| File: | clang/lib/Sema/SemaTemplateInstantiateDecl.cpp |
| Warning: | line 436, column 9 Value stored to 'E' during its initialization is never read |
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| 1 | //===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/ |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | //===----------------------------------------------------------------------===/ |
| 7 | // |
| 8 | // This file implements C++ template instantiation for declarations. |
| 9 | // |
| 10 | //===----------------------------------------------------------------------===/ |
| 11 | |
| 12 | #include "clang/AST/ASTConsumer.h" |
| 13 | #include "clang/AST/ASTContext.h" |
| 14 | #include "clang/AST/ASTMutationListener.h" |
| 15 | #include "clang/AST/DeclTemplate.h" |
| 16 | #include "clang/AST/DeclVisitor.h" |
| 17 | #include "clang/AST/DependentDiagnostic.h" |
| 18 | #include "clang/AST/Expr.h" |
| 19 | #include "clang/AST/ExprCXX.h" |
| 20 | #include "clang/AST/PrettyDeclStackTrace.h" |
| 21 | #include "clang/AST/TypeLoc.h" |
| 22 | #include "clang/Basic/SourceManager.h" |
| 23 | #include "clang/Basic/TargetInfo.h" |
| 24 | #include "clang/Sema/Initialization.h" |
| 25 | #include "clang/Sema/Lookup.h" |
| 26 | #include "clang/Sema/SemaInternal.h" |
| 27 | #include "clang/Sema/Template.h" |
| 28 | #include "clang/Sema/TemplateInstCallback.h" |
| 29 | #include "llvm/Support/TimeProfiler.h" |
| 30 | |
| 31 | using namespace clang; |
| 32 | |
| 33 | static bool isDeclWithinFunction(const Decl *D) { |
| 34 | const DeclContext *DC = D->getDeclContext(); |
| 35 | if (DC->isFunctionOrMethod()) |
| 36 | return true; |
| 37 | |
| 38 | if (DC->isRecord()) |
| 39 | return cast<CXXRecordDecl>(DC)->isLocalClass(); |
| 40 | |
| 41 | return false; |
| 42 | } |
| 43 | |
| 44 | template<typename DeclT> |
| 45 | static bool SubstQualifier(Sema &SemaRef, const DeclT *OldDecl, DeclT *NewDecl, |
| 46 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 47 | if (!OldDecl->getQualifierLoc()) |
| 48 | return false; |
| 49 | |
| 50 | assert((NewDecl->getFriendObjectKind() ||(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)) |
| 51 | !OldDecl->getLexicalDeclContext()->isDependentContext()) &&(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)) |
| 52 | "non-friend with qualified name defined in dependent context")(((NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext ()->isDependentContext()) && "non-friend with qualified name defined in dependent context" ) ? static_cast<void> (0) : __assert_fail ("(NewDecl->getFriendObjectKind() || !OldDecl->getLexicalDeclContext()->isDependentContext()) && \"non-friend with qualified name defined in dependent context\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 52, __PRETTY_FUNCTION__)); |
| 53 | Sema::ContextRAII SavedContext( |
| 54 | SemaRef, |
| 55 | const_cast<DeclContext *>(NewDecl->getFriendObjectKind() |
| 56 | ? NewDecl->getLexicalDeclContext() |
| 57 | : OldDecl->getLexicalDeclContext())); |
| 58 | |
| 59 | NestedNameSpecifierLoc NewQualifierLoc |
| 60 | = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(), |
| 61 | TemplateArgs); |
| 62 | |
| 63 | if (!NewQualifierLoc) |
| 64 | return true; |
| 65 | |
| 66 | NewDecl->setQualifierInfo(NewQualifierLoc); |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl, |
| 71 | DeclaratorDecl *NewDecl) { |
| 72 | return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs); |
| 73 | } |
| 74 | |
| 75 | bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl, |
| 76 | TagDecl *NewDecl) { |
| 77 | return ::SubstQualifier(SemaRef, OldDecl, NewDecl, TemplateArgs); |
| 78 | } |
| 79 | |
| 80 | // Include attribute instantiation code. |
| 81 | #include "clang/Sema/AttrTemplateInstantiate.inc" |
| 82 | |
| 83 | static void instantiateDependentAlignedAttr( |
| 84 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 85 | const AlignedAttr *Aligned, Decl *New, bool IsPackExpansion) { |
| 86 | if (Aligned->isAlignmentExpr()) { |
| 87 | // The alignment expression is a constant expression. |
| 88 | EnterExpressionEvaluationContext Unevaluated( |
| 89 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 90 | ExprResult Result = S.SubstExpr(Aligned->getAlignmentExpr(), TemplateArgs); |
| 91 | if (!Result.isInvalid()) |
| 92 | S.AddAlignedAttr(New, *Aligned, Result.getAs<Expr>(), IsPackExpansion); |
| 93 | } else { |
| 94 | TypeSourceInfo *Result = S.SubstType(Aligned->getAlignmentType(), |
| 95 | TemplateArgs, Aligned->getLocation(), |
| 96 | DeclarationName()); |
| 97 | if (Result) |
| 98 | S.AddAlignedAttr(New, *Aligned, Result, IsPackExpansion); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | static void instantiateDependentAlignedAttr( |
| 103 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 104 | const AlignedAttr *Aligned, Decl *New) { |
| 105 | if (!Aligned->isPackExpansion()) { |
| 106 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false); |
| 107 | return; |
| 108 | } |
| 109 | |
| 110 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| 111 | if (Aligned->isAlignmentExpr()) |
| 112 | S.collectUnexpandedParameterPacks(Aligned->getAlignmentExpr(), |
| 113 | Unexpanded); |
| 114 | else |
| 115 | S.collectUnexpandedParameterPacks(Aligned->getAlignmentType()->getTypeLoc(), |
| 116 | Unexpanded); |
| 117 | assert(!Unexpanded.empty() && "Pack expansion without parameter packs?")((!Unexpanded.empty() && "Pack expansion without parameter packs?" ) ? static_cast<void> (0) : __assert_fail ("!Unexpanded.empty() && \"Pack expansion without parameter packs?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 117, __PRETTY_FUNCTION__)); |
| 118 | |
| 119 | // Determine whether we can expand this attribute pack yet. |
| 120 | bool Expand = true, RetainExpansion = false; |
| 121 | Optional<unsigned> NumExpansions; |
| 122 | // FIXME: Use the actual location of the ellipsis. |
| 123 | SourceLocation EllipsisLoc = Aligned->getLocation(); |
| 124 | if (S.CheckParameterPacksForExpansion(EllipsisLoc, Aligned->getRange(), |
| 125 | Unexpanded, TemplateArgs, Expand, |
| 126 | RetainExpansion, NumExpansions)) |
| 127 | return; |
| 128 | |
| 129 | if (!Expand) { |
| 130 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, -1); |
| 131 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, true); |
| 132 | } else { |
| 133 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
| 134 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, I); |
| 135 | instantiateDependentAlignedAttr(S, TemplateArgs, Aligned, New, false); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | static void instantiateDependentAssumeAlignedAttr( |
| 141 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 142 | const AssumeAlignedAttr *Aligned, Decl *New) { |
| 143 | // The alignment expression is a constant expression. |
| 144 | EnterExpressionEvaluationContext Unevaluated( |
| 145 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 146 | |
| 147 | Expr *E, *OE = nullptr; |
| 148 | ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs); |
| 149 | if (Result.isInvalid()) |
| 150 | return; |
| 151 | E = Result.getAs<Expr>(); |
| 152 | |
| 153 | if (Aligned->getOffset()) { |
| 154 | Result = S.SubstExpr(Aligned->getOffset(), TemplateArgs); |
| 155 | if (Result.isInvalid()) |
| 156 | return; |
| 157 | OE = Result.getAs<Expr>(); |
| 158 | } |
| 159 | |
| 160 | S.AddAssumeAlignedAttr(New, *Aligned, E, OE); |
| 161 | } |
| 162 | |
| 163 | static void instantiateDependentAlignValueAttr( |
| 164 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 165 | const AlignValueAttr *Aligned, Decl *New) { |
| 166 | // The alignment expression is a constant expression. |
| 167 | EnterExpressionEvaluationContext Unevaluated( |
| 168 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 169 | ExprResult Result = S.SubstExpr(Aligned->getAlignment(), TemplateArgs); |
| 170 | if (!Result.isInvalid()) |
| 171 | S.AddAlignValueAttr(New, *Aligned, Result.getAs<Expr>()); |
| 172 | } |
| 173 | |
| 174 | static void instantiateDependentAllocAlignAttr( |
| 175 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 176 | const AllocAlignAttr *Align, Decl *New) { |
| 177 | Expr *Param = IntegerLiteral::Create( |
| 178 | S.getASTContext(), |
| 179 | llvm::APInt(64, Align->getParamIndex().getSourceIndex()), |
| 180 | S.getASTContext().UnsignedLongLongTy, Align->getLocation()); |
| 181 | S.AddAllocAlignAttr(New, *Align, Param); |
| 182 | } |
| 183 | |
| 184 | static void instantiateDependentAnnotationAttr( |
| 185 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 186 | const AnnotateAttr *Attr, Decl *New) { |
| 187 | EnterExpressionEvaluationContext Unevaluated( |
| 188 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 189 | SmallVector<Expr *, 4> Args; |
| 190 | Args.reserve(Attr->args_size()); |
| 191 | for (auto *E : Attr->args()) { |
| 192 | ExprResult Result = S.SubstExpr(E, TemplateArgs); |
| 193 | if (!Result.isUsable()) |
| 194 | return; |
| 195 | Args.push_back(Result.get()); |
| 196 | } |
| 197 | S.AddAnnotationAttr(New, *Attr, Attr->getAnnotation(), Args); |
| 198 | } |
| 199 | |
| 200 | static Expr *instantiateDependentFunctionAttrCondition( |
| 201 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 202 | const Attr *A, Expr *OldCond, const Decl *Tmpl, FunctionDecl *New) { |
| 203 | Expr *Cond = nullptr; |
| 204 | { |
| 205 | Sema::ContextRAII SwitchContext(S, New); |
| 206 | EnterExpressionEvaluationContext Unevaluated( |
| 207 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 208 | ExprResult Result = S.SubstExpr(OldCond, TemplateArgs); |
| 209 | if (Result.isInvalid()) |
| 210 | return nullptr; |
| 211 | Cond = Result.getAs<Expr>(); |
| 212 | } |
| 213 | if (!Cond->isTypeDependent()) { |
| 214 | ExprResult Converted = S.PerformContextuallyConvertToBool(Cond); |
| 215 | if (Converted.isInvalid()) |
| 216 | return nullptr; |
| 217 | Cond = Converted.get(); |
| 218 | } |
| 219 | |
| 220 | SmallVector<PartialDiagnosticAt, 8> Diags; |
| 221 | if (OldCond->isValueDependent() && !Cond->isValueDependent() && |
| 222 | !Expr::isPotentialConstantExprUnevaluated(Cond, New, Diags)) { |
| 223 | S.Diag(A->getLocation(), diag::err_attr_cond_never_constant_expr) << A; |
| 224 | for (const auto &P : Diags) |
| 225 | S.Diag(P.first, P.second); |
| 226 | return nullptr; |
| 227 | } |
| 228 | return Cond; |
| 229 | } |
| 230 | |
| 231 | static void instantiateDependentEnableIfAttr( |
| 232 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 233 | const EnableIfAttr *EIA, const Decl *Tmpl, FunctionDecl *New) { |
| 234 | Expr *Cond = instantiateDependentFunctionAttrCondition( |
| 235 | S, TemplateArgs, EIA, EIA->getCond(), Tmpl, New); |
| 236 | |
| 237 | if (Cond) |
| 238 | New->addAttr(new (S.getASTContext()) EnableIfAttr(S.getASTContext(), *EIA, |
| 239 | Cond, EIA->getMessage())); |
| 240 | } |
| 241 | |
| 242 | static void instantiateDependentDiagnoseIfAttr( |
| 243 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 244 | const DiagnoseIfAttr *DIA, const Decl *Tmpl, FunctionDecl *New) { |
| 245 | Expr *Cond = instantiateDependentFunctionAttrCondition( |
| 246 | S, TemplateArgs, DIA, DIA->getCond(), Tmpl, New); |
| 247 | |
| 248 | if (Cond) |
| 249 | New->addAttr(new (S.getASTContext()) DiagnoseIfAttr( |
| 250 | S.getASTContext(), *DIA, Cond, DIA->getMessage(), |
| 251 | DIA->getDiagnosticType(), DIA->getArgDependent(), New)); |
| 252 | } |
| 253 | |
| 254 | // Constructs and adds to New a new instance of CUDALaunchBoundsAttr using |
| 255 | // template A as the base and arguments from TemplateArgs. |
| 256 | static void instantiateDependentCUDALaunchBoundsAttr( |
| 257 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 258 | const CUDALaunchBoundsAttr &Attr, Decl *New) { |
| 259 | // The alignment expression is a constant expression. |
| 260 | EnterExpressionEvaluationContext Unevaluated( |
| 261 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 262 | |
| 263 | ExprResult Result = S.SubstExpr(Attr.getMaxThreads(), TemplateArgs); |
| 264 | if (Result.isInvalid()) |
| 265 | return; |
| 266 | Expr *MaxThreads = Result.getAs<Expr>(); |
| 267 | |
| 268 | Expr *MinBlocks = nullptr; |
| 269 | if (Attr.getMinBlocks()) { |
| 270 | Result = S.SubstExpr(Attr.getMinBlocks(), TemplateArgs); |
| 271 | if (Result.isInvalid()) |
| 272 | return; |
| 273 | MinBlocks = Result.getAs<Expr>(); |
| 274 | } |
| 275 | |
| 276 | S.AddLaunchBoundsAttr(New, Attr, MaxThreads, MinBlocks); |
| 277 | } |
| 278 | |
| 279 | static void |
| 280 | instantiateDependentModeAttr(Sema &S, |
| 281 | const MultiLevelTemplateArgumentList &TemplateArgs, |
| 282 | const ModeAttr &Attr, Decl *New) { |
| 283 | S.AddModeAttr(New, Attr, Attr.getMode(), |
| 284 | /*InInstantiation=*/true); |
| 285 | } |
| 286 | |
| 287 | /// Instantiation of 'declare simd' attribute and its arguments. |
| 288 | static void instantiateOMPDeclareSimdDeclAttr( |
| 289 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 290 | const OMPDeclareSimdDeclAttr &Attr, Decl *New) { |
| 291 | // Allow 'this' in clauses with varlists. |
| 292 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New)) |
| 293 | New = FTD->getTemplatedDecl(); |
| 294 | auto *FD = cast<FunctionDecl>(New); |
| 295 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext()); |
| 296 | SmallVector<Expr *, 4> Uniforms, Aligneds, Alignments, Linears, Steps; |
| 297 | SmallVector<unsigned, 4> LinModifiers; |
| 298 | |
| 299 | auto SubstExpr = [&](Expr *E) -> ExprResult { |
| 300 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) |
| 301 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) { |
| 302 | Sema::ContextRAII SavedContext(S, FD); |
| 303 | LocalInstantiationScope Local(S); |
| 304 | if (FD->getNumParams() > PVD->getFunctionScopeIndex()) |
| 305 | Local.InstantiatedLocal( |
| 306 | PVD, FD->getParamDecl(PVD->getFunctionScopeIndex())); |
| 307 | return S.SubstExpr(E, TemplateArgs); |
| 308 | } |
| 309 | Sema::CXXThisScopeRAII ThisScope(S, ThisContext, Qualifiers(), |
| 310 | FD->isCXXInstanceMember()); |
| 311 | return S.SubstExpr(E, TemplateArgs); |
| 312 | }; |
| 313 | |
| 314 | // Substitute a single OpenMP clause, which is a potentially-evaluated |
| 315 | // full-expression. |
| 316 | auto Subst = [&](Expr *E) -> ExprResult { |
| 317 | EnterExpressionEvaluationContext Evaluated( |
| 318 | S, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| 319 | ExprResult Res = SubstExpr(E); |
| 320 | if (Res.isInvalid()) |
| 321 | return Res; |
| 322 | return S.ActOnFinishFullExpr(Res.get(), false); |
| 323 | }; |
| 324 | |
| 325 | ExprResult Simdlen; |
| 326 | if (auto *E = Attr.getSimdlen()) |
| 327 | Simdlen = Subst(E); |
| 328 | |
| 329 | if (Attr.uniforms_size() > 0) { |
| 330 | for(auto *E : Attr.uniforms()) { |
| 331 | ExprResult Inst = Subst(E); |
| 332 | if (Inst.isInvalid()) |
| 333 | continue; |
| 334 | Uniforms.push_back(Inst.get()); |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | auto AI = Attr.alignments_begin(); |
| 339 | for (auto *E : Attr.aligneds()) { |
| 340 | ExprResult Inst = Subst(E); |
| 341 | if (Inst.isInvalid()) |
| 342 | continue; |
| 343 | Aligneds.push_back(Inst.get()); |
| 344 | Inst = ExprEmpty(); |
| 345 | if (*AI) |
| 346 | Inst = S.SubstExpr(*AI, TemplateArgs); |
| 347 | Alignments.push_back(Inst.get()); |
| 348 | ++AI; |
| 349 | } |
| 350 | |
| 351 | auto SI = Attr.steps_begin(); |
| 352 | for (auto *E : Attr.linears()) { |
| 353 | ExprResult Inst = Subst(E); |
| 354 | if (Inst.isInvalid()) |
| 355 | continue; |
| 356 | Linears.push_back(Inst.get()); |
| 357 | Inst = ExprEmpty(); |
| 358 | if (*SI) |
| 359 | Inst = S.SubstExpr(*SI, TemplateArgs); |
| 360 | Steps.push_back(Inst.get()); |
| 361 | ++SI; |
| 362 | } |
| 363 | LinModifiers.append(Attr.modifiers_begin(), Attr.modifiers_end()); |
| 364 | (void)S.ActOnOpenMPDeclareSimdDirective( |
| 365 | S.ConvertDeclToDeclGroup(New), Attr.getBranchState(), Simdlen.get(), |
| 366 | Uniforms, Aligneds, Alignments, Linears, LinModifiers, Steps, |
| 367 | Attr.getRange()); |
| 368 | } |
| 369 | |
| 370 | /// Instantiation of 'declare variant' attribute and its arguments. |
| 371 | static void instantiateOMPDeclareVariantAttr( |
| 372 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 373 | const OMPDeclareVariantAttr &Attr, Decl *New) { |
| 374 | // Allow 'this' in clauses with varlists. |
| 375 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(New)) |
| 376 | New = FTD->getTemplatedDecl(); |
| 377 | auto *FD = cast<FunctionDecl>(New); |
| 378 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(FD->getDeclContext()); |
| 379 | |
| 380 | auto &&SubstExpr = [FD, ThisContext, &S, &TemplateArgs](Expr *E) { |
| 381 | if (auto *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) |
| 382 | if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl())) { |
| 383 | Sema::ContextRAII SavedContext(S, FD); |
| 384 | LocalInstantiationScope Local(S); |
| 385 | if (FD->getNumParams() > PVD->getFunctionScopeIndex()) |
| 386 | Local.InstantiatedLocal( |
| 387 | PVD, FD->getParamDecl(PVD->getFunctionScopeIndex())); |
| 388 | return S.SubstExpr(E, TemplateArgs); |
| 389 | } |
| 390 | Sema::CXXThisScopeRAII ThisScope(S, ThisContext, Qualifiers(), |
| 391 | FD->isCXXInstanceMember()); |
| 392 | return S.SubstExpr(E, TemplateArgs); |
| 393 | }; |
| 394 | |
| 395 | // Substitute a single OpenMP clause, which is a potentially-evaluated |
| 396 | // full-expression. |
| 397 | auto &&Subst = [&SubstExpr, &S](Expr *E) { |
| 398 | EnterExpressionEvaluationContext Evaluated( |
| 399 | S, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| 400 | ExprResult Res = SubstExpr(E); |
| 401 | if (Res.isInvalid()) |
| 402 | return Res; |
| 403 | return S.ActOnFinishFullExpr(Res.get(), false); |
| 404 | }; |
| 405 | |
| 406 | ExprResult VariantFuncRef; |
| 407 | if (Expr *E = Attr.getVariantFuncRef()) { |
| 408 | // Do not mark function as is used to prevent its emission if this is the |
| 409 | // only place where it is used. |
| 410 | EnterExpressionEvaluationContext Unevaluated( |
| 411 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 412 | VariantFuncRef = Subst(E); |
| 413 | } |
| 414 | |
| 415 | // Copy the template version of the OMPTraitInfo and run substitute on all |
| 416 | // score and condition expressiosn. |
| 417 | OMPTraitInfo &TI = S.getASTContext().getNewOMPTraitInfo(); |
| 418 | TI = *Attr.getTraitInfos(); |
| 419 | |
| 420 | // Try to substitute template parameters in score and condition expressions. |
| 421 | auto SubstScoreOrConditionExpr = [&S, Subst](Expr *&E, bool) { |
| 422 | if (E) { |
| 423 | EnterExpressionEvaluationContext Unevaluated( |
| 424 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 425 | ExprResult ER = Subst(E); |
| 426 | if (ER.isUsable()) |
| 427 | E = ER.get(); |
| 428 | else |
| 429 | return true; |
| 430 | } |
| 431 | return false; |
| 432 | }; |
| 433 | if (TI.anyScoreOrCondition(SubstScoreOrConditionExpr)) |
| 434 | return; |
| 435 | |
| 436 | Expr *E = VariantFuncRef.get(); |
Value stored to 'E' during its initialization is never read | |
| 437 | // Check function/variant ref for `omp declare variant` but not for `omp |
| 438 | // begin declare variant` (which use implicit attributes). |
| 439 | Optional<std::pair<FunctionDecl *, Expr *>> DeclVarData = |
| 440 | S.checkOpenMPDeclareVariantFunction(S.ConvertDeclToDeclGroup(New), |
| 441 | VariantFuncRef.get(), TI, |
| 442 | Attr.getRange()); |
| 443 | |
| 444 | if (!DeclVarData) |
| 445 | return; |
| 446 | |
| 447 | E = DeclVarData.getValue().second; |
| 448 | FD = DeclVarData.getValue().first; |
| 449 | |
| 450 | if (auto *VariantDRE = dyn_cast<DeclRefExpr>(E->IgnoreParenImpCasts())) { |
| 451 | if (auto *VariantFD = dyn_cast<FunctionDecl>(VariantDRE->getDecl())) { |
| 452 | if (auto *VariantFTD = VariantFD->getDescribedFunctionTemplate()) { |
| 453 | if (!VariantFTD->isThisDeclarationADefinition()) |
| 454 | return; |
| 455 | Sema::TentativeAnalysisScope Trap(S); |
| 456 | const TemplateArgumentList *TAL = TemplateArgumentList::CreateCopy( |
| 457 | S.Context, TemplateArgs.getInnermost()); |
| 458 | |
| 459 | auto *SubstFD = S.InstantiateFunctionDeclaration(VariantFTD, TAL, |
| 460 | New->getLocation()); |
| 461 | if (!SubstFD) |
| 462 | return; |
| 463 | QualType NewType = S.Context.mergeFunctionTypes( |
| 464 | SubstFD->getType(), FD->getType(), |
| 465 | /* OfBlockPointer */ false, |
| 466 | /* Unqualified */ false, /* AllowCXX */ true); |
| 467 | if (NewType.isNull()) |
| 468 | return; |
| 469 | S.InstantiateFunctionDefinition( |
| 470 | New->getLocation(), SubstFD, /* Recursive */ true, |
| 471 | /* DefinitionRequired */ false, /* AtEndOfTU */ false); |
| 472 | SubstFD->setInstantiationIsPending(!SubstFD->isDefined()); |
| 473 | E = DeclRefExpr::Create(S.Context, NestedNameSpecifierLoc(), |
| 474 | SourceLocation(), SubstFD, |
| 475 | /* RefersToEnclosingVariableOrCapture */ false, |
| 476 | /* NameLoc */ SubstFD->getLocation(), |
| 477 | SubstFD->getType(), ExprValueKind::VK_RValue); |
| 478 | } |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | S.ActOnOpenMPDeclareVariantDirective(FD, E, TI, Attr.getRange()); |
| 483 | } |
| 484 | |
| 485 | static void instantiateDependentAMDGPUFlatWorkGroupSizeAttr( |
| 486 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 487 | const AMDGPUFlatWorkGroupSizeAttr &Attr, Decl *New) { |
| 488 | // Both min and max expression are constant expressions. |
| 489 | EnterExpressionEvaluationContext Unevaluated( |
| 490 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 491 | |
| 492 | ExprResult Result = S.SubstExpr(Attr.getMin(), TemplateArgs); |
| 493 | if (Result.isInvalid()) |
| 494 | return; |
| 495 | Expr *MinExpr = Result.getAs<Expr>(); |
| 496 | |
| 497 | Result = S.SubstExpr(Attr.getMax(), TemplateArgs); |
| 498 | if (Result.isInvalid()) |
| 499 | return; |
| 500 | Expr *MaxExpr = Result.getAs<Expr>(); |
| 501 | |
| 502 | S.addAMDGPUFlatWorkGroupSizeAttr(New, Attr, MinExpr, MaxExpr); |
| 503 | } |
| 504 | |
| 505 | static ExplicitSpecifier |
| 506 | instantiateExplicitSpecifier(Sema &S, |
| 507 | const MultiLevelTemplateArgumentList &TemplateArgs, |
| 508 | ExplicitSpecifier ES, FunctionDecl *New) { |
| 509 | if (!ES.getExpr()) |
| 510 | return ES; |
| 511 | Expr *OldCond = ES.getExpr(); |
| 512 | Expr *Cond = nullptr; |
| 513 | { |
| 514 | EnterExpressionEvaluationContext Unevaluated( |
| 515 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 516 | ExprResult SubstResult = S.SubstExpr(OldCond, TemplateArgs); |
| 517 | if (SubstResult.isInvalid()) { |
| 518 | return ExplicitSpecifier::Invalid(); |
| 519 | } |
| 520 | Cond = SubstResult.get(); |
| 521 | } |
| 522 | ExplicitSpecifier Result(Cond, ES.getKind()); |
| 523 | if (!Cond->isTypeDependent()) |
| 524 | S.tryResolveExplicitSpecifier(Result); |
| 525 | return Result; |
| 526 | } |
| 527 | |
| 528 | static void instantiateDependentAMDGPUWavesPerEUAttr( |
| 529 | Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs, |
| 530 | const AMDGPUWavesPerEUAttr &Attr, Decl *New) { |
| 531 | // Both min and max expression are constant expressions. |
| 532 | EnterExpressionEvaluationContext Unevaluated( |
| 533 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 534 | |
| 535 | ExprResult Result = S.SubstExpr(Attr.getMin(), TemplateArgs); |
| 536 | if (Result.isInvalid()) |
| 537 | return; |
| 538 | Expr *MinExpr = Result.getAs<Expr>(); |
| 539 | |
| 540 | Expr *MaxExpr = nullptr; |
| 541 | if (auto Max = Attr.getMax()) { |
| 542 | Result = S.SubstExpr(Max, TemplateArgs); |
| 543 | if (Result.isInvalid()) |
| 544 | return; |
| 545 | MaxExpr = Result.getAs<Expr>(); |
| 546 | } |
| 547 | |
| 548 | S.addAMDGPUWavesPerEUAttr(New, Attr, MinExpr, MaxExpr); |
| 549 | } |
| 550 | |
| 551 | /// Determine whether the attribute A might be relevent to the declaration D. |
| 552 | /// If not, we can skip instantiating it. The attribute may or may not have |
| 553 | /// been instantiated yet. |
| 554 | static bool isRelevantAttr(Sema &S, const Decl *D, const Attr *A) { |
| 555 | // 'preferred_name' is only relevant to the matching specialization of the |
| 556 | // template. |
| 557 | if (const auto *PNA = dyn_cast<PreferredNameAttr>(A)) { |
| 558 | QualType T = PNA->getTypedefType(); |
| 559 | const auto *RD = cast<CXXRecordDecl>(D); |
| 560 | if (!T->isDependentType() && !RD->isDependentContext() && |
| 561 | !declaresSameEntity(T->getAsCXXRecordDecl(), RD)) |
| 562 | return false; |
| 563 | for (const auto *ExistingPNA : D->specific_attrs<PreferredNameAttr>()) |
| 564 | if (S.Context.hasSameType(ExistingPNA->getTypedefType(), |
| 565 | PNA->getTypedefType())) |
| 566 | return false; |
| 567 | return true; |
| 568 | } |
| 569 | |
| 570 | return true; |
| 571 | } |
| 572 | |
| 573 | void Sema::InstantiateAttrsForDecl( |
| 574 | const MultiLevelTemplateArgumentList &TemplateArgs, const Decl *Tmpl, |
| 575 | Decl *New, LateInstantiatedAttrVec *LateAttrs, |
| 576 | LocalInstantiationScope *OuterMostScope) { |
| 577 | if (NamedDecl *ND = dyn_cast<NamedDecl>(New)) { |
| 578 | // FIXME: This function is called multiple times for the same template |
| 579 | // specialization. We should only instantiate attributes that were added |
| 580 | // since the previous instantiation. |
| 581 | for (const auto *TmplAttr : Tmpl->attrs()) { |
| 582 | if (!isRelevantAttr(*this, New, TmplAttr)) |
| 583 | continue; |
| 584 | |
| 585 | // FIXME: If any of the special case versions from InstantiateAttrs become |
| 586 | // applicable to template declaration, we'll need to add them here. |
| 587 | CXXThisScopeRAII ThisScope( |
| 588 | *this, dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()), |
| 589 | Qualifiers(), ND->isCXXInstanceMember()); |
| 590 | |
| 591 | Attr *NewAttr = sema::instantiateTemplateAttributeForDecl( |
| 592 | TmplAttr, Context, *this, TemplateArgs); |
| 593 | if (NewAttr && isRelevantAttr(*this, New, NewAttr)) |
| 594 | New->addAttr(NewAttr); |
| 595 | } |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | static Sema::RetainOwnershipKind |
| 600 | attrToRetainOwnershipKind(const Attr *A) { |
| 601 | switch (A->getKind()) { |
| 602 | case clang::attr::CFConsumed: |
| 603 | return Sema::RetainOwnershipKind::CF; |
| 604 | case clang::attr::OSConsumed: |
| 605 | return Sema::RetainOwnershipKind::OS; |
| 606 | case clang::attr::NSConsumed: |
| 607 | return Sema::RetainOwnershipKind::NS; |
| 608 | default: |
| 609 | llvm_unreachable("Wrong argument supplied")::llvm::llvm_unreachable_internal("Wrong argument supplied", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 609); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, |
| 614 | const Decl *Tmpl, Decl *New, |
| 615 | LateInstantiatedAttrVec *LateAttrs, |
| 616 | LocalInstantiationScope *OuterMostScope) { |
| 617 | for (const auto *TmplAttr : Tmpl->attrs()) { |
| 618 | if (!isRelevantAttr(*this, New, TmplAttr)) |
| 619 | continue; |
| 620 | |
| 621 | // FIXME: This should be generalized to more than just the AlignedAttr. |
| 622 | const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr); |
| 623 | if (Aligned && Aligned->isAlignmentDependent()) { |
| 624 | instantiateDependentAlignedAttr(*this, TemplateArgs, Aligned, New); |
| 625 | continue; |
| 626 | } |
| 627 | |
| 628 | if (const auto *AssumeAligned = dyn_cast<AssumeAlignedAttr>(TmplAttr)) { |
| 629 | instantiateDependentAssumeAlignedAttr(*this, TemplateArgs, AssumeAligned, New); |
| 630 | continue; |
| 631 | } |
| 632 | |
| 633 | if (const auto *AlignValue = dyn_cast<AlignValueAttr>(TmplAttr)) { |
| 634 | instantiateDependentAlignValueAttr(*this, TemplateArgs, AlignValue, New); |
| 635 | continue; |
| 636 | } |
| 637 | |
| 638 | if (const auto *AllocAlign = dyn_cast<AllocAlignAttr>(TmplAttr)) { |
| 639 | instantiateDependentAllocAlignAttr(*this, TemplateArgs, AllocAlign, New); |
| 640 | continue; |
| 641 | } |
| 642 | |
| 643 | if (const auto *Annotate = dyn_cast<AnnotateAttr>(TmplAttr)) { |
| 644 | instantiateDependentAnnotationAttr(*this, TemplateArgs, Annotate, New); |
| 645 | continue; |
| 646 | } |
| 647 | |
| 648 | if (const auto *EnableIf = dyn_cast<EnableIfAttr>(TmplAttr)) { |
| 649 | instantiateDependentEnableIfAttr(*this, TemplateArgs, EnableIf, Tmpl, |
| 650 | cast<FunctionDecl>(New)); |
| 651 | continue; |
| 652 | } |
| 653 | |
| 654 | if (const auto *DiagnoseIf = dyn_cast<DiagnoseIfAttr>(TmplAttr)) { |
| 655 | instantiateDependentDiagnoseIfAttr(*this, TemplateArgs, DiagnoseIf, Tmpl, |
| 656 | cast<FunctionDecl>(New)); |
| 657 | continue; |
| 658 | } |
| 659 | |
| 660 | if (const auto *CUDALaunchBounds = |
| 661 | dyn_cast<CUDALaunchBoundsAttr>(TmplAttr)) { |
| 662 | instantiateDependentCUDALaunchBoundsAttr(*this, TemplateArgs, |
| 663 | *CUDALaunchBounds, New); |
| 664 | continue; |
| 665 | } |
| 666 | |
| 667 | if (const auto *Mode = dyn_cast<ModeAttr>(TmplAttr)) { |
| 668 | instantiateDependentModeAttr(*this, TemplateArgs, *Mode, New); |
| 669 | continue; |
| 670 | } |
| 671 | |
| 672 | if (const auto *OMPAttr = dyn_cast<OMPDeclareSimdDeclAttr>(TmplAttr)) { |
| 673 | instantiateOMPDeclareSimdDeclAttr(*this, TemplateArgs, *OMPAttr, New); |
| 674 | continue; |
| 675 | } |
| 676 | |
| 677 | if (const auto *OMPAttr = dyn_cast<OMPDeclareVariantAttr>(TmplAttr)) { |
| 678 | instantiateOMPDeclareVariantAttr(*this, TemplateArgs, *OMPAttr, New); |
| 679 | continue; |
| 680 | } |
| 681 | |
| 682 | if (const auto *AMDGPUFlatWorkGroupSize = |
| 683 | dyn_cast<AMDGPUFlatWorkGroupSizeAttr>(TmplAttr)) { |
| 684 | instantiateDependentAMDGPUFlatWorkGroupSizeAttr( |
| 685 | *this, TemplateArgs, *AMDGPUFlatWorkGroupSize, New); |
| 686 | } |
| 687 | |
| 688 | if (const auto *AMDGPUFlatWorkGroupSize = |
| 689 | dyn_cast<AMDGPUWavesPerEUAttr>(TmplAttr)) { |
| 690 | instantiateDependentAMDGPUWavesPerEUAttr(*this, TemplateArgs, |
| 691 | *AMDGPUFlatWorkGroupSize, New); |
| 692 | } |
| 693 | |
| 694 | // Existing DLL attribute on the instantiation takes precedence. |
| 695 | if (TmplAttr->getKind() == attr::DLLExport || |
| 696 | TmplAttr->getKind() == attr::DLLImport) { |
| 697 | if (New->hasAttr<DLLExportAttr>() || New->hasAttr<DLLImportAttr>()) { |
| 698 | continue; |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | if (const auto *ABIAttr = dyn_cast<ParameterABIAttr>(TmplAttr)) { |
| 703 | AddParameterABIAttr(New, *ABIAttr, ABIAttr->getABI()); |
| 704 | continue; |
| 705 | } |
| 706 | |
| 707 | if (isa<NSConsumedAttr>(TmplAttr) || isa<OSConsumedAttr>(TmplAttr) || |
| 708 | isa<CFConsumedAttr>(TmplAttr)) { |
| 709 | AddXConsumedAttr(New, *TmplAttr, attrToRetainOwnershipKind(TmplAttr), |
| 710 | /*template instantiation=*/true); |
| 711 | continue; |
| 712 | } |
| 713 | |
| 714 | if (auto *A = dyn_cast<PointerAttr>(TmplAttr)) { |
| 715 | if (!New->hasAttr<PointerAttr>()) |
| 716 | New->addAttr(A->clone(Context)); |
| 717 | continue; |
| 718 | } |
| 719 | |
| 720 | if (auto *A = dyn_cast<OwnerAttr>(TmplAttr)) { |
| 721 | if (!New->hasAttr<OwnerAttr>()) |
| 722 | New->addAttr(A->clone(Context)); |
| 723 | continue; |
| 724 | } |
| 725 | |
| 726 | assert(!TmplAttr->isPackExpansion())((!TmplAttr->isPackExpansion()) ? static_cast<void> ( 0) : __assert_fail ("!TmplAttr->isPackExpansion()", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 726, __PRETTY_FUNCTION__)); |
| 727 | if (TmplAttr->isLateParsed() && LateAttrs) { |
| 728 | // Late parsed attributes must be instantiated and attached after the |
| 729 | // enclosing class has been instantiated. See Sema::InstantiateClass. |
| 730 | LocalInstantiationScope *Saved = nullptr; |
| 731 | if (CurrentInstantiationScope) |
| 732 | Saved = CurrentInstantiationScope->cloneScopes(OuterMostScope); |
| 733 | LateAttrs->push_back(LateInstantiatedAttribute(TmplAttr, Saved, New)); |
| 734 | } else { |
| 735 | // Allow 'this' within late-parsed attributes. |
| 736 | auto *ND = cast<NamedDecl>(New); |
| 737 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()); |
| 738 | CXXThisScopeRAII ThisScope(*this, ThisContext, Qualifiers(), |
| 739 | ND->isCXXInstanceMember()); |
| 740 | |
| 741 | Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context, |
| 742 | *this, TemplateArgs); |
| 743 | if (NewAttr && isRelevantAttr(*this, New, TmplAttr)) |
| 744 | New->addAttr(NewAttr); |
| 745 | } |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /// In the MS ABI, we need to instantiate default arguments of dllexported |
| 750 | /// default constructors along with the constructor definition. This allows IR |
| 751 | /// gen to emit a constructor closure which calls the default constructor with |
| 752 | /// its default arguments. |
| 753 | void Sema::InstantiateDefaultCtorDefaultArgs(CXXConstructorDecl *Ctor) { |
| 754 | assert(Context.getTargetInfo().getCXXABI().isMicrosoft() &&((Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()) ? static_cast<void> ( 0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 755, __PRETTY_FUNCTION__)) |
| 755 | Ctor->isDefaultConstructor())((Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()) ? static_cast<void> ( 0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && Ctor->isDefaultConstructor()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 755, __PRETTY_FUNCTION__)); |
| 756 | unsigned NumParams = Ctor->getNumParams(); |
| 757 | if (NumParams == 0) |
| 758 | return; |
| 759 | DLLExportAttr *Attr = Ctor->getAttr<DLLExportAttr>(); |
| 760 | if (!Attr) |
| 761 | return; |
| 762 | for (unsigned I = 0; I != NumParams; ++I) { |
| 763 | (void)CheckCXXDefaultArgExpr(Attr->getLocation(), Ctor, |
| 764 | Ctor->getParamDecl(I)); |
| 765 | DiscardCleanupsInEvaluationContext(); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | /// Get the previous declaration of a declaration for the purposes of template |
| 770 | /// instantiation. If this finds a previous declaration, then the previous |
| 771 | /// declaration of the instantiation of D should be an instantiation of the |
| 772 | /// result of this function. |
| 773 | template<typename DeclT> |
| 774 | static DeclT *getPreviousDeclForInstantiation(DeclT *D) { |
| 775 | DeclT *Result = D->getPreviousDecl(); |
| 776 | |
| 777 | // If the declaration is within a class, and the previous declaration was |
| 778 | // merged from a different definition of that class, then we don't have a |
| 779 | // previous declaration for the purpose of template instantiation. |
| 780 | if (Result && isa<CXXRecordDecl>(D->getDeclContext()) && |
| 781 | D->getLexicalDeclContext() != Result->getLexicalDeclContext()) |
| 782 | return nullptr; |
| 783 | |
| 784 | return Result; |
| 785 | } |
| 786 | |
| 787 | Decl * |
| 788 | TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) { |
| 789 | llvm_unreachable("Translation units cannot be instantiated")::llvm::llvm_unreachable_internal("Translation units cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 789); |
| 790 | } |
| 791 | |
| 792 | Decl * |
| 793 | TemplateDeclInstantiator::VisitPragmaCommentDecl(PragmaCommentDecl *D) { |
| 794 | llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 794); |
| 795 | } |
| 796 | |
| 797 | Decl *TemplateDeclInstantiator::VisitPragmaDetectMismatchDecl( |
| 798 | PragmaDetectMismatchDecl *D) { |
| 799 | llvm_unreachable("pragma comment cannot be instantiated")::llvm::llvm_unreachable_internal("pragma comment cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 799); |
| 800 | } |
| 801 | |
| 802 | Decl * |
| 803 | TemplateDeclInstantiator::VisitExternCContextDecl(ExternCContextDecl *D) { |
| 804 | llvm_unreachable("extern \"C\" context cannot be instantiated")::llvm::llvm_unreachable_internal("extern \"C\" context cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 804); |
| 805 | } |
| 806 | |
| 807 | Decl *TemplateDeclInstantiator::VisitMSGuidDecl(MSGuidDecl *D) { |
| 808 | llvm_unreachable("GUID declaration cannot be instantiated")::llvm::llvm_unreachable_internal("GUID declaration cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 808); |
| 809 | } |
| 810 | |
| 811 | Decl *TemplateDeclInstantiator::VisitTemplateParamObjectDecl( |
| 812 | TemplateParamObjectDecl *D) { |
| 813 | llvm_unreachable("template parameter objects cannot be instantiated")::llvm::llvm_unreachable_internal("template parameter objects cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 813); |
| 814 | } |
| 815 | |
| 816 | Decl * |
| 817 | TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) { |
| 818 | LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
| 819 | D->getIdentifier()); |
| 820 | Owner->addDecl(Inst); |
| 821 | return Inst; |
| 822 | } |
| 823 | |
| 824 | Decl * |
| 825 | TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) { |
| 826 | llvm_unreachable("Namespaces cannot be instantiated")::llvm::llvm_unreachable_internal("Namespaces cannot be instantiated" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 826); |
| 827 | } |
| 828 | |
| 829 | Decl * |
| 830 | TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) { |
| 831 | NamespaceAliasDecl *Inst |
| 832 | = NamespaceAliasDecl::Create(SemaRef.Context, Owner, |
| 833 | D->getNamespaceLoc(), |
| 834 | D->getAliasLoc(), |
| 835 | D->getIdentifier(), |
| 836 | D->getQualifierLoc(), |
| 837 | D->getTargetNameLoc(), |
| 838 | D->getNamespace()); |
| 839 | Owner->addDecl(Inst); |
| 840 | return Inst; |
| 841 | } |
| 842 | |
| 843 | Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D, |
| 844 | bool IsTypeAlias) { |
| 845 | bool Invalid = false; |
| 846 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
| 847 | if (DI->getType()->isInstantiationDependentType() || |
| 848 | DI->getType()->isVariablyModifiedType()) { |
| 849 | DI = SemaRef.SubstType(DI, TemplateArgs, |
| 850 | D->getLocation(), D->getDeclName()); |
| 851 | if (!DI) { |
| 852 | Invalid = true; |
| 853 | DI = SemaRef.Context.getTrivialTypeSourceInfo(SemaRef.Context.IntTy); |
| 854 | } |
| 855 | } else { |
| 856 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
| 857 | } |
| 858 | |
| 859 | // HACK: g++ has a bug where it gets the value kind of ?: wrong. |
| 860 | // libstdc++ relies upon this bug in its implementation of common_type. |
| 861 | // If we happen to be processing that implementation, fake up the g++ ?: |
| 862 | // semantics. See LWG issue 2141 for more information on the bug. |
| 863 | const DecltypeType *DT = DI->getType()->getAs<DecltypeType>(); |
| 864 | CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext()); |
| 865 | if (DT && RD && isa<ConditionalOperator>(DT->getUnderlyingExpr()) && |
| 866 | DT->isReferenceType() && |
| 867 | RD->getEnclosingNamespaceContext() == SemaRef.getStdNamespace() && |
| 868 | RD->getIdentifier() && RD->getIdentifier()->isStr("common_type") && |
| 869 | D->getIdentifier() && D->getIdentifier()->isStr("type") && |
| 870 | SemaRef.getSourceManager().isInSystemHeader(D->getBeginLoc())) |
| 871 | // Fold it to the (non-reference) type which g++ would have produced. |
| 872 | DI = SemaRef.Context.getTrivialTypeSourceInfo( |
| 873 | DI->getType().getNonReferenceType()); |
| 874 | |
| 875 | // Create the new typedef |
| 876 | TypedefNameDecl *Typedef; |
| 877 | if (IsTypeAlias) |
| 878 | Typedef = TypeAliasDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
| 879 | D->getLocation(), D->getIdentifier(), DI); |
| 880 | else |
| 881 | Typedef = TypedefDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
| 882 | D->getLocation(), D->getIdentifier(), DI); |
| 883 | if (Invalid) |
| 884 | Typedef->setInvalidDecl(); |
| 885 | |
| 886 | // If the old typedef was the name for linkage purposes of an anonymous |
| 887 | // tag decl, re-establish that relationship for the new typedef. |
| 888 | if (const TagType *oldTagType = D->getUnderlyingType()->getAs<TagType>()) { |
| 889 | TagDecl *oldTag = oldTagType->getDecl(); |
| 890 | if (oldTag->getTypedefNameForAnonDecl() == D && !Invalid) { |
| 891 | TagDecl *newTag = DI->getType()->castAs<TagType>()->getDecl(); |
| 892 | assert(!newTag->hasNameForLinkage())((!newTag->hasNameForLinkage()) ? static_cast<void> ( 0) : __assert_fail ("!newTag->hasNameForLinkage()", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 892, __PRETTY_FUNCTION__)); |
| 893 | newTag->setTypedefNameForAnonDecl(Typedef); |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | if (TypedefNameDecl *Prev = getPreviousDeclForInstantiation(D)) { |
| 898 | NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(D->getLocation(), Prev, |
| 899 | TemplateArgs); |
| 900 | if (!InstPrev) |
| 901 | return nullptr; |
| 902 | |
| 903 | TypedefNameDecl *InstPrevTypedef = cast<TypedefNameDecl>(InstPrev); |
| 904 | |
| 905 | // If the typedef types are not identical, reject them. |
| 906 | SemaRef.isIncompatibleTypedef(InstPrevTypedef, Typedef); |
| 907 | |
| 908 | Typedef->setPreviousDecl(InstPrevTypedef); |
| 909 | } |
| 910 | |
| 911 | SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef); |
| 912 | |
| 913 | if (D->getUnderlyingType()->getAs<DependentNameType>()) |
| 914 | SemaRef.inferGslPointerAttribute(Typedef); |
| 915 | |
| 916 | Typedef->setAccess(D->getAccess()); |
| 917 | |
| 918 | return Typedef; |
| 919 | } |
| 920 | |
| 921 | Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) { |
| 922 | Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false); |
| 923 | if (Typedef) |
| 924 | Owner->addDecl(Typedef); |
| 925 | return Typedef; |
| 926 | } |
| 927 | |
| 928 | Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) { |
| 929 | Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true); |
| 930 | if (Typedef) |
| 931 | Owner->addDecl(Typedef); |
| 932 | return Typedef; |
| 933 | } |
| 934 | |
| 935 | Decl * |
| 936 | TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) { |
| 937 | // Create a local instantiation scope for this type alias template, which |
| 938 | // will contain the instantiations of the template parameters. |
| 939 | LocalInstantiationScope Scope(SemaRef); |
| 940 | |
| 941 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
| 942 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 943 | if (!InstParams) |
| 944 | return nullptr; |
| 945 | |
| 946 | TypeAliasDecl *Pattern = D->getTemplatedDecl(); |
| 947 | |
| 948 | TypeAliasTemplateDecl *PrevAliasTemplate = nullptr; |
| 949 | if (getPreviousDeclForInstantiation<TypedefNameDecl>(Pattern)) { |
| 950 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
| 951 | if (!Found.empty()) { |
| 952 | PrevAliasTemplate = dyn_cast<TypeAliasTemplateDecl>(Found.front()); |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | TypeAliasDecl *AliasInst = cast_or_null<TypeAliasDecl>( |
| 957 | InstantiateTypedefNameDecl(Pattern, /*IsTypeAlias=*/true)); |
| 958 | if (!AliasInst) |
| 959 | return nullptr; |
| 960 | |
| 961 | TypeAliasTemplateDecl *Inst |
| 962 | = TypeAliasTemplateDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
| 963 | D->getDeclName(), InstParams, AliasInst); |
| 964 | AliasInst->setDescribedAliasTemplate(Inst); |
| 965 | if (PrevAliasTemplate) |
| 966 | Inst->setPreviousDecl(PrevAliasTemplate); |
| 967 | |
| 968 | Inst->setAccess(D->getAccess()); |
| 969 | |
| 970 | if (!PrevAliasTemplate) |
| 971 | Inst->setInstantiatedFromMemberTemplate(D); |
| 972 | |
| 973 | Owner->addDecl(Inst); |
| 974 | |
| 975 | return Inst; |
| 976 | } |
| 977 | |
| 978 | Decl *TemplateDeclInstantiator::VisitBindingDecl(BindingDecl *D) { |
| 979 | auto *NewBD = BindingDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
| 980 | D->getIdentifier()); |
| 981 | NewBD->setReferenced(D->isReferenced()); |
| 982 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewBD); |
| 983 | return NewBD; |
| 984 | } |
| 985 | |
| 986 | Decl *TemplateDeclInstantiator::VisitDecompositionDecl(DecompositionDecl *D) { |
| 987 | // Transform the bindings first. |
| 988 | SmallVector<BindingDecl*, 16> NewBindings; |
| 989 | for (auto *OldBD : D->bindings()) |
| 990 | NewBindings.push_back(cast<BindingDecl>(VisitBindingDecl(OldBD))); |
| 991 | ArrayRef<BindingDecl*> NewBindingArray = NewBindings; |
| 992 | |
| 993 | auto *NewDD = cast_or_null<DecompositionDecl>( |
| 994 | VisitVarDecl(D, /*InstantiatingVarTemplate=*/false, &NewBindingArray)); |
| 995 | |
| 996 | if (!NewDD || NewDD->isInvalidDecl()) |
| 997 | for (auto *NewBD : NewBindings) |
| 998 | NewBD->setInvalidDecl(); |
| 999 | |
| 1000 | return NewDD; |
| 1001 | } |
| 1002 | |
| 1003 | Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) { |
| 1004 | return VisitVarDecl(D, /*InstantiatingVarTemplate=*/false); |
| 1005 | } |
| 1006 | |
| 1007 | Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D, |
| 1008 | bool InstantiatingVarTemplate, |
| 1009 | ArrayRef<BindingDecl*> *Bindings) { |
| 1010 | |
| 1011 | // Do substitution on the type of the declaration |
| 1012 | TypeSourceInfo *DI = SemaRef.SubstType( |
| 1013 | D->getTypeSourceInfo(), TemplateArgs, D->getTypeSpecStartLoc(), |
| 1014 | D->getDeclName(), /*AllowDeducedTST*/true); |
| 1015 | if (!DI) |
| 1016 | return nullptr; |
| 1017 | |
| 1018 | if (DI->getType()->isFunctionType()) { |
| 1019 | SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function) |
| 1020 | << D->isStaticDataMember() << DI->getType(); |
| 1021 | return nullptr; |
| 1022 | } |
| 1023 | |
| 1024 | DeclContext *DC = Owner; |
| 1025 | if (D->isLocalExternDecl()) |
| 1026 | SemaRef.adjustContextForLocalExternDecl(DC); |
| 1027 | |
| 1028 | // Build the instantiated declaration. |
| 1029 | VarDecl *Var; |
| 1030 | if (Bindings) |
| 1031 | Var = DecompositionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(), |
| 1032 | D->getLocation(), DI->getType(), DI, |
| 1033 | D->getStorageClass(), *Bindings); |
| 1034 | else |
| 1035 | Var = VarDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(), |
| 1036 | D->getLocation(), D->getIdentifier(), DI->getType(), |
| 1037 | DI, D->getStorageClass()); |
| 1038 | |
| 1039 | // In ARC, infer 'retaining' for variables of retainable type. |
| 1040 | if (SemaRef.getLangOpts().ObjCAutoRefCount && |
| 1041 | SemaRef.inferObjCARCLifetime(Var)) |
| 1042 | Var->setInvalidDecl(); |
| 1043 | |
| 1044 | if (SemaRef.getLangOpts().OpenCL) |
| 1045 | SemaRef.deduceOpenCLAddressSpace(Var); |
| 1046 | |
| 1047 | // Substitute the nested name specifier, if any. |
| 1048 | if (SubstQualifier(D, Var)) |
| 1049 | return nullptr; |
| 1050 | |
| 1051 | SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner, |
| 1052 | StartingScope, InstantiatingVarTemplate); |
| 1053 | |
| 1054 | if (D->isNRVOVariable()) { |
| 1055 | QualType ReturnType = cast<FunctionDecl>(DC)->getReturnType(); |
| 1056 | if (SemaRef.isCopyElisionCandidate(ReturnType, Var, Sema::CES_Strict)) |
| 1057 | Var->setNRVOVariable(true); |
| 1058 | } |
| 1059 | |
| 1060 | Var->setImplicit(D->isImplicit()); |
| 1061 | |
| 1062 | if (Var->isStaticLocal()) |
| 1063 | SemaRef.CheckStaticLocalForDllExport(Var); |
| 1064 | |
| 1065 | return Var; |
| 1066 | } |
| 1067 | |
| 1068 | Decl *TemplateDeclInstantiator::VisitAccessSpecDecl(AccessSpecDecl *D) { |
| 1069 | AccessSpecDecl* AD |
| 1070 | = AccessSpecDecl::Create(SemaRef.Context, D->getAccess(), Owner, |
| 1071 | D->getAccessSpecifierLoc(), D->getColonLoc()); |
| 1072 | Owner->addHiddenDecl(AD); |
| 1073 | return AD; |
| 1074 | } |
| 1075 | |
| 1076 | Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) { |
| 1077 | bool Invalid = false; |
| 1078 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
| 1079 | if (DI->getType()->isInstantiationDependentType() || |
| 1080 | DI->getType()->isVariablyModifiedType()) { |
| 1081 | DI = SemaRef.SubstType(DI, TemplateArgs, |
| 1082 | D->getLocation(), D->getDeclName()); |
| 1083 | if (!DI) { |
| 1084 | DI = D->getTypeSourceInfo(); |
| 1085 | Invalid = true; |
| 1086 | } else if (DI->getType()->isFunctionType()) { |
| 1087 | // C++ [temp.arg.type]p3: |
| 1088 | // If a declaration acquires a function type through a type |
| 1089 | // dependent on a template-parameter and this causes a |
| 1090 | // declaration that does not use the syntactic form of a |
| 1091 | // function declarator to have function type, the program is |
| 1092 | // ill-formed. |
| 1093 | SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function) |
| 1094 | << DI->getType(); |
| 1095 | Invalid = true; |
| 1096 | } |
| 1097 | } else { |
| 1098 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
| 1099 | } |
| 1100 | |
| 1101 | Expr *BitWidth = D->getBitWidth(); |
| 1102 | if (Invalid) |
| 1103 | BitWidth = nullptr; |
| 1104 | else if (BitWidth) { |
| 1105 | // The bit-width expression is a constant expression. |
| 1106 | EnterExpressionEvaluationContext Unevaluated( |
| 1107 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 1108 | |
| 1109 | ExprResult InstantiatedBitWidth |
| 1110 | = SemaRef.SubstExpr(BitWidth, TemplateArgs); |
| 1111 | if (InstantiatedBitWidth.isInvalid()) { |
| 1112 | Invalid = true; |
| 1113 | BitWidth = nullptr; |
| 1114 | } else |
| 1115 | BitWidth = InstantiatedBitWidth.getAs<Expr>(); |
| 1116 | } |
| 1117 | |
| 1118 | FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(), |
| 1119 | DI->getType(), DI, |
| 1120 | cast<RecordDecl>(Owner), |
| 1121 | D->getLocation(), |
| 1122 | D->isMutable(), |
| 1123 | BitWidth, |
| 1124 | D->getInClassInitStyle(), |
| 1125 | D->getInnerLocStart(), |
| 1126 | D->getAccess(), |
| 1127 | nullptr); |
| 1128 | if (!Field) { |
| 1129 | cast<Decl>(Owner)->setInvalidDecl(); |
| 1130 | return nullptr; |
| 1131 | } |
| 1132 | |
| 1133 | SemaRef.InstantiateAttrs(TemplateArgs, D, Field, LateAttrs, StartingScope); |
| 1134 | |
| 1135 | if (Field->hasAttrs()) |
| 1136 | SemaRef.CheckAlignasUnderalignment(Field); |
| 1137 | |
| 1138 | if (Invalid) |
| 1139 | Field->setInvalidDecl(); |
| 1140 | |
| 1141 | if (!Field->getDeclName()) { |
| 1142 | // Keep track of where this decl came from. |
| 1143 | SemaRef.Context.setInstantiatedFromUnnamedFieldDecl(Field, D); |
| 1144 | } |
| 1145 | if (CXXRecordDecl *Parent= dyn_cast<CXXRecordDecl>(Field->getDeclContext())) { |
| 1146 | if (Parent->isAnonymousStructOrUnion() && |
| 1147 | Parent->getRedeclContext()->isFunctionOrMethod()) |
| 1148 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Field); |
| 1149 | } |
| 1150 | |
| 1151 | Field->setImplicit(D->isImplicit()); |
| 1152 | Field->setAccess(D->getAccess()); |
| 1153 | Owner->addDecl(Field); |
| 1154 | |
| 1155 | return Field; |
| 1156 | } |
| 1157 | |
| 1158 | Decl *TemplateDeclInstantiator::VisitMSPropertyDecl(MSPropertyDecl *D) { |
| 1159 | bool Invalid = false; |
| 1160 | TypeSourceInfo *DI = D->getTypeSourceInfo(); |
| 1161 | |
| 1162 | if (DI->getType()->isVariablyModifiedType()) { |
| 1163 | SemaRef.Diag(D->getLocation(), diag::err_property_is_variably_modified) |
| 1164 | << D; |
| 1165 | Invalid = true; |
| 1166 | } else if (DI->getType()->isInstantiationDependentType()) { |
| 1167 | DI = SemaRef.SubstType(DI, TemplateArgs, |
| 1168 | D->getLocation(), D->getDeclName()); |
| 1169 | if (!DI) { |
| 1170 | DI = D->getTypeSourceInfo(); |
| 1171 | Invalid = true; |
| 1172 | } else if (DI->getType()->isFunctionType()) { |
| 1173 | // C++ [temp.arg.type]p3: |
| 1174 | // If a declaration acquires a function type through a type |
| 1175 | // dependent on a template-parameter and this causes a |
| 1176 | // declaration that does not use the syntactic form of a |
| 1177 | // function declarator to have function type, the program is |
| 1178 | // ill-formed. |
| 1179 | SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function) |
| 1180 | << DI->getType(); |
| 1181 | Invalid = true; |
| 1182 | } |
| 1183 | } else { |
| 1184 | SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType()); |
| 1185 | } |
| 1186 | |
| 1187 | MSPropertyDecl *Property = MSPropertyDecl::Create( |
| 1188 | SemaRef.Context, Owner, D->getLocation(), D->getDeclName(), DI->getType(), |
| 1189 | DI, D->getBeginLoc(), D->getGetterId(), D->getSetterId()); |
| 1190 | |
| 1191 | SemaRef.InstantiateAttrs(TemplateArgs, D, Property, LateAttrs, |
| 1192 | StartingScope); |
| 1193 | |
| 1194 | if (Invalid) |
| 1195 | Property->setInvalidDecl(); |
| 1196 | |
| 1197 | Property->setAccess(D->getAccess()); |
| 1198 | Owner->addDecl(Property); |
| 1199 | |
| 1200 | return Property; |
| 1201 | } |
| 1202 | |
| 1203 | Decl *TemplateDeclInstantiator::VisitIndirectFieldDecl(IndirectFieldDecl *D) { |
| 1204 | NamedDecl **NamedChain = |
| 1205 | new (SemaRef.Context)NamedDecl*[D->getChainingSize()]; |
| 1206 | |
| 1207 | int i = 0; |
| 1208 | for (auto *PI : D->chain()) { |
| 1209 | NamedDecl *Next = SemaRef.FindInstantiatedDecl(D->getLocation(), PI, |
| 1210 | TemplateArgs); |
| 1211 | if (!Next) |
| 1212 | return nullptr; |
| 1213 | |
| 1214 | NamedChain[i++] = Next; |
| 1215 | } |
| 1216 | |
| 1217 | QualType T = cast<FieldDecl>(NamedChain[i-1])->getType(); |
| 1218 | IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create( |
| 1219 | SemaRef.Context, Owner, D->getLocation(), D->getIdentifier(), T, |
| 1220 | {NamedChain, D->getChainingSize()}); |
| 1221 | |
| 1222 | for (const auto *Attr : D->attrs()) |
| 1223 | IndirectField->addAttr(Attr->clone(SemaRef.Context)); |
| 1224 | |
| 1225 | IndirectField->setImplicit(D->isImplicit()); |
| 1226 | IndirectField->setAccess(D->getAccess()); |
| 1227 | Owner->addDecl(IndirectField); |
| 1228 | return IndirectField; |
| 1229 | } |
| 1230 | |
| 1231 | Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) { |
| 1232 | // Handle friend type expressions by simply substituting template |
| 1233 | // parameters into the pattern type and checking the result. |
| 1234 | if (TypeSourceInfo *Ty = D->getFriendType()) { |
| 1235 | TypeSourceInfo *InstTy; |
| 1236 | // If this is an unsupported friend, don't bother substituting template |
| 1237 | // arguments into it. The actual type referred to won't be used by any |
| 1238 | // parts of Clang, and may not be valid for instantiating. Just use the |
| 1239 | // same info for the instantiated friend. |
| 1240 | if (D->isUnsupportedFriend()) { |
| 1241 | InstTy = Ty; |
| 1242 | } else { |
| 1243 | InstTy = SemaRef.SubstType(Ty, TemplateArgs, |
| 1244 | D->getLocation(), DeclarationName()); |
| 1245 | } |
| 1246 | if (!InstTy) |
| 1247 | return nullptr; |
| 1248 | |
| 1249 | FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getBeginLoc(), |
| 1250 | D->getFriendLoc(), InstTy); |
| 1251 | if (!FD) |
| 1252 | return nullptr; |
| 1253 | |
| 1254 | FD->setAccess(AS_public); |
| 1255 | FD->setUnsupportedFriend(D->isUnsupportedFriend()); |
| 1256 | Owner->addDecl(FD); |
| 1257 | return FD; |
| 1258 | } |
| 1259 | |
| 1260 | NamedDecl *ND = D->getFriendDecl(); |
| 1261 | assert(ND && "friend decl must be a decl or a type!")((ND && "friend decl must be a decl or a type!") ? static_cast <void> (0) : __assert_fail ("ND && \"friend decl must be a decl or a type!\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1261, __PRETTY_FUNCTION__)); |
| 1262 | |
| 1263 | // All of the Visit implementations for the various potential friend |
| 1264 | // declarations have to be carefully written to work for friend |
| 1265 | // objects, with the most important detail being that the target |
| 1266 | // decl should almost certainly not be placed in Owner. |
| 1267 | Decl *NewND = Visit(ND); |
| 1268 | if (!NewND) return nullptr; |
| 1269 | |
| 1270 | FriendDecl *FD = |
| 1271 | FriendDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
| 1272 | cast<NamedDecl>(NewND), D->getFriendLoc()); |
| 1273 | FD->setAccess(AS_public); |
| 1274 | FD->setUnsupportedFriend(D->isUnsupportedFriend()); |
| 1275 | Owner->addDecl(FD); |
| 1276 | return FD; |
| 1277 | } |
| 1278 | |
| 1279 | Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) { |
| 1280 | Expr *AssertExpr = D->getAssertExpr(); |
| 1281 | |
| 1282 | // The expression in a static assertion is a constant expression. |
| 1283 | EnterExpressionEvaluationContext Unevaluated( |
| 1284 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 1285 | |
| 1286 | ExprResult InstantiatedAssertExpr |
| 1287 | = SemaRef.SubstExpr(AssertExpr, TemplateArgs); |
| 1288 | if (InstantiatedAssertExpr.isInvalid()) |
| 1289 | return nullptr; |
| 1290 | |
| 1291 | return SemaRef.BuildStaticAssertDeclaration(D->getLocation(), |
| 1292 | InstantiatedAssertExpr.get(), |
| 1293 | D->getMessage(), |
| 1294 | D->getRParenLoc(), |
| 1295 | D->isFailed()); |
| 1296 | } |
| 1297 | |
| 1298 | Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) { |
| 1299 | EnumDecl *PrevDecl = nullptr; |
| 1300 | if (EnumDecl *PatternPrev = getPreviousDeclForInstantiation(D)) { |
| 1301 | NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(), |
| 1302 | PatternPrev, |
| 1303 | TemplateArgs); |
| 1304 | if (!Prev) return nullptr; |
| 1305 | PrevDecl = cast<EnumDecl>(Prev); |
| 1306 | } |
| 1307 | |
| 1308 | EnumDecl *Enum = |
| 1309 | EnumDecl::Create(SemaRef.Context, Owner, D->getBeginLoc(), |
| 1310 | D->getLocation(), D->getIdentifier(), PrevDecl, |
| 1311 | D->isScoped(), D->isScopedUsingClassTag(), D->isFixed()); |
| 1312 | if (D->isFixed()) { |
| 1313 | if (TypeSourceInfo *TI = D->getIntegerTypeSourceInfo()) { |
| 1314 | // If we have type source information for the underlying type, it means it |
| 1315 | // has been explicitly set by the user. Perform substitution on it before |
| 1316 | // moving on. |
| 1317 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
| 1318 | TypeSourceInfo *NewTI = SemaRef.SubstType(TI, TemplateArgs, UnderlyingLoc, |
| 1319 | DeclarationName()); |
| 1320 | if (!NewTI || SemaRef.CheckEnumUnderlyingType(NewTI)) |
| 1321 | Enum->setIntegerType(SemaRef.Context.IntTy); |
| 1322 | else |
| 1323 | Enum->setIntegerTypeSourceInfo(NewTI); |
| 1324 | } else { |
| 1325 | assert(!D->getIntegerType()->isDependentType()((!D->getIntegerType()->isDependentType() && "Dependent type without type source info" ) ? static_cast<void> (0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1326, __PRETTY_FUNCTION__)) |
| 1326 | && "Dependent type without type source info")((!D->getIntegerType()->isDependentType() && "Dependent type without type source info" ) ? static_cast<void> (0) : __assert_fail ("!D->getIntegerType()->isDependentType() && \"Dependent type without type source info\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1326, __PRETTY_FUNCTION__)); |
| 1327 | Enum->setIntegerType(D->getIntegerType()); |
| 1328 | } |
| 1329 | } |
| 1330 | |
| 1331 | SemaRef.InstantiateAttrs(TemplateArgs, D, Enum); |
| 1332 | |
| 1333 | Enum->setInstantiationOfMemberEnum(D, TSK_ImplicitInstantiation); |
| 1334 | Enum->setAccess(D->getAccess()); |
| 1335 | // Forward the mangling number from the template to the instantiated decl. |
| 1336 | SemaRef.Context.setManglingNumber(Enum, SemaRef.Context.getManglingNumber(D)); |
| 1337 | // See if the old tag was defined along with a declarator. |
| 1338 | // If it did, mark the new tag as being associated with that declarator. |
| 1339 | if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D)) |
| 1340 | SemaRef.Context.addDeclaratorForUnnamedTagDecl(Enum, DD); |
| 1341 | // See if the old tag was defined along with a typedef. |
| 1342 | // If it did, mark the new tag as being associated with that typedef. |
| 1343 | if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D)) |
| 1344 | SemaRef.Context.addTypedefNameForUnnamedTagDecl(Enum, TND); |
| 1345 | if (SubstQualifier(D, Enum)) return nullptr; |
| 1346 | Owner->addDecl(Enum); |
| 1347 | |
| 1348 | EnumDecl *Def = D->getDefinition(); |
| 1349 | if (Def && Def != D) { |
| 1350 | // If this is an out-of-line definition of an enum member template, check |
| 1351 | // that the underlying types match in the instantiation of both |
| 1352 | // declarations. |
| 1353 | if (TypeSourceInfo *TI = Def->getIntegerTypeSourceInfo()) { |
| 1354 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
| 1355 | QualType DefnUnderlying = |
| 1356 | SemaRef.SubstType(TI->getType(), TemplateArgs, |
| 1357 | UnderlyingLoc, DeclarationName()); |
| 1358 | SemaRef.CheckEnumRedeclaration(Def->getLocation(), Def->isScoped(), |
| 1359 | DefnUnderlying, /*IsFixed=*/true, Enum); |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | // C++11 [temp.inst]p1: The implicit instantiation of a class template |
| 1364 | // specialization causes the implicit instantiation of the declarations, but |
| 1365 | // not the definitions of scoped member enumerations. |
| 1366 | // |
| 1367 | // DR1484 clarifies that enumeration definitions inside of a template |
| 1368 | // declaration aren't considered entities that can be separately instantiated |
| 1369 | // from the rest of the entity they are declared inside of. |
| 1370 | if (isDeclWithinFunction(D) ? D == Def : Def && !Enum->isScoped()) { |
| 1371 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Enum); |
| 1372 | InstantiateEnumDefinition(Enum, Def); |
| 1373 | } |
| 1374 | |
| 1375 | return Enum; |
| 1376 | } |
| 1377 | |
| 1378 | void TemplateDeclInstantiator::InstantiateEnumDefinition( |
| 1379 | EnumDecl *Enum, EnumDecl *Pattern) { |
| 1380 | Enum->startDefinition(); |
| 1381 | |
| 1382 | // Update the location to refer to the definition. |
| 1383 | Enum->setLocation(Pattern->getLocation()); |
| 1384 | |
| 1385 | SmallVector<Decl*, 4> Enumerators; |
| 1386 | |
| 1387 | EnumConstantDecl *LastEnumConst = nullptr; |
| 1388 | for (auto *EC : Pattern->enumerators()) { |
| 1389 | // The specified value for the enumerator. |
| 1390 | ExprResult Value((Expr *)nullptr); |
| 1391 | if (Expr *UninstValue = EC->getInitExpr()) { |
| 1392 | // The enumerator's value expression is a constant expression. |
| 1393 | EnterExpressionEvaluationContext Unevaluated( |
| 1394 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 1395 | |
| 1396 | Value = SemaRef.SubstExpr(UninstValue, TemplateArgs); |
| 1397 | } |
| 1398 | |
| 1399 | // Drop the initial value and continue. |
| 1400 | bool isInvalid = false; |
| 1401 | if (Value.isInvalid()) { |
| 1402 | Value = nullptr; |
| 1403 | isInvalid = true; |
| 1404 | } |
| 1405 | |
| 1406 | EnumConstantDecl *EnumConst |
| 1407 | = SemaRef.CheckEnumConstant(Enum, LastEnumConst, |
| 1408 | EC->getLocation(), EC->getIdentifier(), |
| 1409 | Value.get()); |
| 1410 | |
| 1411 | if (isInvalid) { |
| 1412 | if (EnumConst) |
| 1413 | EnumConst->setInvalidDecl(); |
| 1414 | Enum->setInvalidDecl(); |
| 1415 | } |
| 1416 | |
| 1417 | if (EnumConst) { |
| 1418 | SemaRef.InstantiateAttrs(TemplateArgs, EC, EnumConst); |
| 1419 | |
| 1420 | EnumConst->setAccess(Enum->getAccess()); |
| 1421 | Enum->addDecl(EnumConst); |
| 1422 | Enumerators.push_back(EnumConst); |
| 1423 | LastEnumConst = EnumConst; |
| 1424 | |
| 1425 | if (Pattern->getDeclContext()->isFunctionOrMethod() && |
| 1426 | !Enum->isScoped()) { |
| 1427 | // If the enumeration is within a function or method, record the enum |
| 1428 | // constant as a local. |
| 1429 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(EC, EnumConst); |
| 1430 | } |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | SemaRef.ActOnEnumBody(Enum->getLocation(), Enum->getBraceRange(), Enum, |
| 1435 | Enumerators, nullptr, ParsedAttributesView()); |
| 1436 | } |
| 1437 | |
| 1438 | Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) { |
| 1439 | llvm_unreachable("EnumConstantDecls can only occur within EnumDecls.")::llvm::llvm_unreachable_internal("EnumConstantDecls can only occur within EnumDecls." , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1439); |
| 1440 | } |
| 1441 | |
| 1442 | Decl * |
| 1443 | TemplateDeclInstantiator::VisitBuiltinTemplateDecl(BuiltinTemplateDecl *D) { |
| 1444 | llvm_unreachable("BuiltinTemplateDecls cannot be instantiated.")::llvm::llvm_unreachable_internal("BuiltinTemplateDecls cannot be instantiated." , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1444); |
| 1445 | } |
| 1446 | |
| 1447 | Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) { |
| 1448 | bool isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
| 1449 | |
| 1450 | // Create a local instantiation scope for this class template, which |
| 1451 | // will contain the instantiations of the template parameters. |
| 1452 | LocalInstantiationScope Scope(SemaRef); |
| 1453 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
| 1454 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 1455 | if (!InstParams) |
| 1456 | return nullptr; |
| 1457 | |
| 1458 | CXXRecordDecl *Pattern = D->getTemplatedDecl(); |
| 1459 | |
| 1460 | // Instantiate the qualifier. We have to do this first in case |
| 1461 | // we're a friend declaration, because if we are then we need to put |
| 1462 | // the new declaration in the appropriate context. |
| 1463 | NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc(); |
| 1464 | if (QualifierLoc) { |
| 1465 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
| 1466 | TemplateArgs); |
| 1467 | if (!QualifierLoc) |
| 1468 | return nullptr; |
| 1469 | } |
| 1470 | |
| 1471 | CXXRecordDecl *PrevDecl = nullptr; |
| 1472 | ClassTemplateDecl *PrevClassTemplate = nullptr; |
| 1473 | |
| 1474 | if (!isFriend && getPreviousDeclForInstantiation(Pattern)) { |
| 1475 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
| 1476 | if (!Found.empty()) { |
| 1477 | PrevClassTemplate = dyn_cast<ClassTemplateDecl>(Found.front()); |
| 1478 | if (PrevClassTemplate) |
| 1479 | PrevDecl = PrevClassTemplate->getTemplatedDecl(); |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | // If this isn't a friend, then it's a member template, in which |
| 1484 | // case we just want to build the instantiation in the |
| 1485 | // specialization. If it is a friend, we want to build it in |
| 1486 | // the appropriate context. |
| 1487 | DeclContext *DC = Owner; |
| 1488 | if (isFriend) { |
| 1489 | if (QualifierLoc) { |
| 1490 | CXXScopeSpec SS; |
| 1491 | SS.Adopt(QualifierLoc); |
| 1492 | DC = SemaRef.computeDeclContext(SS); |
| 1493 | if (!DC) return nullptr; |
| 1494 | } else { |
| 1495 | DC = SemaRef.FindInstantiatedContext(Pattern->getLocation(), |
| 1496 | Pattern->getDeclContext(), |
| 1497 | TemplateArgs); |
| 1498 | } |
| 1499 | |
| 1500 | // Look for a previous declaration of the template in the owning |
| 1501 | // context. |
| 1502 | LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(), |
| 1503 | Sema::LookupOrdinaryName, |
| 1504 | SemaRef.forRedeclarationInCurContext()); |
| 1505 | SemaRef.LookupQualifiedName(R, DC); |
| 1506 | |
| 1507 | if (R.isSingleResult()) { |
| 1508 | PrevClassTemplate = R.getAsSingle<ClassTemplateDecl>(); |
| 1509 | if (PrevClassTemplate) |
| 1510 | PrevDecl = PrevClassTemplate->getTemplatedDecl(); |
| 1511 | } |
| 1512 | |
| 1513 | if (!PrevClassTemplate && QualifierLoc) { |
| 1514 | SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope) |
| 1515 | << D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC |
| 1516 | << QualifierLoc.getSourceRange(); |
| 1517 | return nullptr; |
| 1518 | } |
| 1519 | |
| 1520 | bool AdoptedPreviousTemplateParams = false; |
| 1521 | if (PrevClassTemplate) { |
| 1522 | bool Complain = true; |
| 1523 | |
| 1524 | // HACK: libstdc++ 4.2.1 contains an ill-formed friend class |
| 1525 | // template for struct std::tr1::__detail::_Map_base, where the |
| 1526 | // template parameters of the friend declaration don't match the |
| 1527 | // template parameters of the original declaration. In this one |
| 1528 | // case, we don't complain about the ill-formed friend |
| 1529 | // declaration. |
| 1530 | if (isFriend && Pattern->getIdentifier() && |
| 1531 | Pattern->getIdentifier()->isStr("_Map_base") && |
| 1532 | DC->isNamespace() && |
| 1533 | cast<NamespaceDecl>(DC)->getIdentifier() && |
| 1534 | cast<NamespaceDecl>(DC)->getIdentifier()->isStr("__detail")) { |
| 1535 | DeclContext *DCParent = DC->getParent(); |
| 1536 | if (DCParent->isNamespace() && |
| 1537 | cast<NamespaceDecl>(DCParent)->getIdentifier() && |
| 1538 | cast<NamespaceDecl>(DCParent)->getIdentifier()->isStr("tr1")) { |
| 1539 | if (cast<Decl>(DCParent)->isInStdNamespace()) |
| 1540 | Complain = false; |
| 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | TemplateParameterList *PrevParams |
| 1545 | = PrevClassTemplate->getMostRecentDecl()->getTemplateParameters(); |
| 1546 | |
| 1547 | // Make sure the parameter lists match. |
| 1548 | if (!SemaRef.TemplateParameterListsAreEqual(InstParams, PrevParams, |
| 1549 | Complain, |
| 1550 | Sema::TPL_TemplateMatch)) { |
| 1551 | if (Complain) |
| 1552 | return nullptr; |
| 1553 | |
| 1554 | AdoptedPreviousTemplateParams = true; |
| 1555 | InstParams = PrevParams; |
| 1556 | } |
| 1557 | |
| 1558 | // Do some additional validation, then merge default arguments |
| 1559 | // from the existing declarations. |
| 1560 | if (!AdoptedPreviousTemplateParams && |
| 1561 | SemaRef.CheckTemplateParameterList(InstParams, PrevParams, |
| 1562 | Sema::TPC_ClassTemplate)) |
| 1563 | return nullptr; |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | CXXRecordDecl *RecordInst = CXXRecordDecl::Create( |
| 1568 | SemaRef.Context, Pattern->getTagKind(), DC, Pattern->getBeginLoc(), |
| 1569 | Pattern->getLocation(), Pattern->getIdentifier(), PrevDecl, |
| 1570 | /*DelayTypeCreation=*/true); |
| 1571 | |
| 1572 | if (QualifierLoc) |
| 1573 | RecordInst->setQualifierInfo(QualifierLoc); |
| 1574 | |
| 1575 | SemaRef.InstantiateAttrsForDecl(TemplateArgs, Pattern, RecordInst, LateAttrs, |
| 1576 | StartingScope); |
| 1577 | |
| 1578 | ClassTemplateDecl *Inst |
| 1579 | = ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(), |
| 1580 | D->getIdentifier(), InstParams, RecordInst); |
| 1581 | assert(!(isFriend && Owner->isDependentContext()))((!(isFriend && Owner->isDependentContext())) ? static_cast <void> (0) : __assert_fail ("!(isFriend && Owner->isDependentContext())" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1581, __PRETTY_FUNCTION__)); |
| 1582 | Inst->setPreviousDecl(PrevClassTemplate); |
| 1583 | |
| 1584 | RecordInst->setDescribedClassTemplate(Inst); |
| 1585 | |
| 1586 | if (isFriend) { |
| 1587 | if (PrevClassTemplate) |
| 1588 | Inst->setAccess(PrevClassTemplate->getAccess()); |
| 1589 | else |
| 1590 | Inst->setAccess(D->getAccess()); |
| 1591 | |
| 1592 | Inst->setObjectOfFriendDecl(); |
| 1593 | // TODO: do we want to track the instantiation progeny of this |
| 1594 | // friend target decl? |
| 1595 | } else { |
| 1596 | Inst->setAccess(D->getAccess()); |
| 1597 | if (!PrevClassTemplate) |
| 1598 | Inst->setInstantiatedFromMemberTemplate(D); |
| 1599 | } |
| 1600 | |
| 1601 | // Trigger creation of the type for the instantiation. |
| 1602 | SemaRef.Context.getInjectedClassNameType(RecordInst, |
| 1603 | Inst->getInjectedClassNameSpecialization()); |
| 1604 | |
| 1605 | // Finish handling of friends. |
| 1606 | if (isFriend) { |
| 1607 | DC->makeDeclVisibleInContext(Inst); |
| 1608 | Inst->setLexicalDeclContext(Owner); |
| 1609 | RecordInst->setLexicalDeclContext(Owner); |
| 1610 | return Inst; |
| 1611 | } |
| 1612 | |
| 1613 | if (D->isOutOfLine()) { |
| 1614 | Inst->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 1615 | RecordInst->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 1616 | } |
| 1617 | |
| 1618 | Owner->addDecl(Inst); |
| 1619 | |
| 1620 | if (!PrevClassTemplate) { |
| 1621 | // Queue up any out-of-line partial specializations of this member |
| 1622 | // class template; the client will force their instantiation once |
| 1623 | // the enclosing class has been instantiated. |
| 1624 | SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
| 1625 | D->getPartialSpecializations(PartialSpecs); |
| 1626 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) |
| 1627 | if (PartialSpecs[I]->getFirstDecl()->isOutOfLine()) |
| 1628 | OutOfLinePartialSpecs.push_back(std::make_pair(Inst, PartialSpecs[I])); |
| 1629 | } |
| 1630 | |
| 1631 | return Inst; |
| 1632 | } |
| 1633 | |
| 1634 | Decl * |
| 1635 | TemplateDeclInstantiator::VisitClassTemplatePartialSpecializationDecl( |
| 1636 | ClassTemplatePartialSpecializationDecl *D) { |
| 1637 | ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate(); |
| 1638 | |
| 1639 | // Lookup the already-instantiated declaration in the instantiation |
| 1640 | // of the class template and return that. |
| 1641 | DeclContext::lookup_result Found |
| 1642 | = Owner->lookup(ClassTemplate->getDeclName()); |
| 1643 | if (Found.empty()) |
| 1644 | return nullptr; |
| 1645 | |
| 1646 | ClassTemplateDecl *InstClassTemplate |
| 1647 | = dyn_cast<ClassTemplateDecl>(Found.front()); |
| 1648 | if (!InstClassTemplate) |
| 1649 | return nullptr; |
| 1650 | |
| 1651 | if (ClassTemplatePartialSpecializationDecl *Result |
| 1652 | = InstClassTemplate->findPartialSpecInstantiatedFromMember(D)) |
| 1653 | return Result; |
| 1654 | |
| 1655 | return InstantiateClassTemplatePartialSpecialization(InstClassTemplate, D); |
| 1656 | } |
| 1657 | |
| 1658 | Decl *TemplateDeclInstantiator::VisitVarTemplateDecl(VarTemplateDecl *D) { |
| 1659 | assert(D->getTemplatedDecl()->isStaticDataMember() &&((D->getTemplatedDecl()->isStaticDataMember() && "Only static data member templates are allowed.") ? static_cast <void> (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1660, __PRETTY_FUNCTION__)) |
| 1660 | "Only static data member templates are allowed.")((D->getTemplatedDecl()->isStaticDataMember() && "Only static data member templates are allowed.") ? static_cast <void> (0) : __assert_fail ("D->getTemplatedDecl()->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1660, __PRETTY_FUNCTION__)); |
| 1661 | |
| 1662 | // Create a local instantiation scope for this variable template, which |
| 1663 | // will contain the instantiations of the template parameters. |
| 1664 | LocalInstantiationScope Scope(SemaRef); |
| 1665 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
| 1666 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 1667 | if (!InstParams) |
| 1668 | return nullptr; |
| 1669 | |
| 1670 | VarDecl *Pattern = D->getTemplatedDecl(); |
| 1671 | VarTemplateDecl *PrevVarTemplate = nullptr; |
| 1672 | |
| 1673 | if (getPreviousDeclForInstantiation(Pattern)) { |
| 1674 | DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName()); |
| 1675 | if (!Found.empty()) |
| 1676 | PrevVarTemplate = dyn_cast<VarTemplateDecl>(Found.front()); |
| 1677 | } |
| 1678 | |
| 1679 | VarDecl *VarInst = |
| 1680 | cast_or_null<VarDecl>(VisitVarDecl(Pattern, |
| 1681 | /*InstantiatingVarTemplate=*/true)); |
| 1682 | if (!VarInst) return nullptr; |
| 1683 | |
| 1684 | DeclContext *DC = Owner; |
| 1685 | |
| 1686 | VarTemplateDecl *Inst = VarTemplateDecl::Create( |
| 1687 | SemaRef.Context, DC, D->getLocation(), D->getIdentifier(), InstParams, |
| 1688 | VarInst); |
| 1689 | VarInst->setDescribedVarTemplate(Inst); |
| 1690 | Inst->setPreviousDecl(PrevVarTemplate); |
| 1691 | |
| 1692 | Inst->setAccess(D->getAccess()); |
| 1693 | if (!PrevVarTemplate) |
| 1694 | Inst->setInstantiatedFromMemberTemplate(D); |
| 1695 | |
| 1696 | if (D->isOutOfLine()) { |
| 1697 | Inst->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 1698 | VarInst->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 1699 | } |
| 1700 | |
| 1701 | Owner->addDecl(Inst); |
| 1702 | |
| 1703 | if (!PrevVarTemplate) { |
| 1704 | // Queue up any out-of-line partial specializations of this member |
| 1705 | // variable template; the client will force their instantiation once |
| 1706 | // the enclosing class has been instantiated. |
| 1707 | SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
| 1708 | D->getPartialSpecializations(PartialSpecs); |
| 1709 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) |
| 1710 | if (PartialSpecs[I]->getFirstDecl()->isOutOfLine()) |
| 1711 | OutOfLineVarPartialSpecs.push_back( |
| 1712 | std::make_pair(Inst, PartialSpecs[I])); |
| 1713 | } |
| 1714 | |
| 1715 | return Inst; |
| 1716 | } |
| 1717 | |
| 1718 | Decl *TemplateDeclInstantiator::VisitVarTemplatePartialSpecializationDecl( |
| 1719 | VarTemplatePartialSpecializationDecl *D) { |
| 1720 | assert(D->isStaticDataMember() &&((D->isStaticDataMember() && "Only static data member templates are allowed." ) ? static_cast<void> (0) : __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1721, __PRETTY_FUNCTION__)) |
| 1721 | "Only static data member templates are allowed.")((D->isStaticDataMember() && "Only static data member templates are allowed." ) ? static_cast<void> (0) : __assert_fail ("D->isStaticDataMember() && \"Only static data member templates are allowed.\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1721, __PRETTY_FUNCTION__)); |
| 1722 | |
| 1723 | VarTemplateDecl *VarTemplate = D->getSpecializedTemplate(); |
| 1724 | |
| 1725 | // Lookup the already-instantiated declaration and return that. |
| 1726 | DeclContext::lookup_result Found = Owner->lookup(VarTemplate->getDeclName()); |
| 1727 | assert(!Found.empty() && "Instantiation found nothing?")((!Found.empty() && "Instantiation found nothing?") ? static_cast<void> (0) : __assert_fail ("!Found.empty() && \"Instantiation found nothing?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1727, __PRETTY_FUNCTION__)); |
| 1728 | |
| 1729 | VarTemplateDecl *InstVarTemplate = dyn_cast<VarTemplateDecl>(Found.front()); |
| 1730 | assert(InstVarTemplate && "Instantiation did not find a variable template?")((InstVarTemplate && "Instantiation did not find a variable template?" ) ? static_cast<void> (0) : __assert_fail ("InstVarTemplate && \"Instantiation did not find a variable template?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1730, __PRETTY_FUNCTION__)); |
| 1731 | |
| 1732 | if (VarTemplatePartialSpecializationDecl *Result = |
| 1733 | InstVarTemplate->findPartialSpecInstantiatedFromMember(D)) |
| 1734 | return Result; |
| 1735 | |
| 1736 | return InstantiateVarTemplatePartialSpecialization(InstVarTemplate, D); |
| 1737 | } |
| 1738 | |
| 1739 | Decl * |
| 1740 | TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) { |
| 1741 | // Create a local instantiation scope for this function template, which |
| 1742 | // will contain the instantiations of the template parameters and then get |
| 1743 | // merged with the local instantiation scope for the function template |
| 1744 | // itself. |
| 1745 | LocalInstantiationScope Scope(SemaRef); |
| 1746 | |
| 1747 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
| 1748 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 1749 | if (!InstParams) |
| 1750 | return nullptr; |
| 1751 | |
| 1752 | FunctionDecl *Instantiated = nullptr; |
| 1753 | if (CXXMethodDecl *DMethod = dyn_cast<CXXMethodDecl>(D->getTemplatedDecl())) |
| 1754 | Instantiated = cast_or_null<FunctionDecl>(VisitCXXMethodDecl(DMethod, |
| 1755 | InstParams)); |
| 1756 | else |
| 1757 | Instantiated = cast_or_null<FunctionDecl>(VisitFunctionDecl( |
| 1758 | D->getTemplatedDecl(), |
| 1759 | InstParams)); |
| 1760 | |
| 1761 | if (!Instantiated) |
| 1762 | return nullptr; |
| 1763 | |
| 1764 | // Link the instantiated function template declaration to the function |
| 1765 | // template from which it was instantiated. |
| 1766 | FunctionTemplateDecl *InstTemplate |
| 1767 | = Instantiated->getDescribedFunctionTemplate(); |
| 1768 | InstTemplate->setAccess(D->getAccess()); |
| 1769 | assert(InstTemplate &&((InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!" ) ? static_cast<void> (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1770, __PRETTY_FUNCTION__)) |
| 1770 | "VisitFunctionDecl/CXXMethodDecl didn't create a template!")((InstTemplate && "VisitFunctionDecl/CXXMethodDecl didn't create a template!" ) ? static_cast<void> (0) : __assert_fail ("InstTemplate && \"VisitFunctionDecl/CXXMethodDecl didn't create a template!\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 1770, __PRETTY_FUNCTION__)); |
| 1771 | |
| 1772 | bool isFriend = (InstTemplate->getFriendObjectKind() != Decl::FOK_None); |
| 1773 | |
| 1774 | // Link the instantiation back to the pattern *unless* this is a |
| 1775 | // non-definition friend declaration. |
| 1776 | if (!InstTemplate->getInstantiatedFromMemberTemplate() && |
| 1777 | !(isFriend && !D->getTemplatedDecl()->isThisDeclarationADefinition())) |
| 1778 | InstTemplate->setInstantiatedFromMemberTemplate(D); |
| 1779 | |
| 1780 | // Make declarations visible in the appropriate context. |
| 1781 | if (!isFriend) { |
| 1782 | Owner->addDecl(InstTemplate); |
| 1783 | } else if (InstTemplate->getDeclContext()->isRecord() && |
| 1784 | !getPreviousDeclForInstantiation(D)) { |
| 1785 | SemaRef.CheckFriendAccess(InstTemplate); |
| 1786 | } |
| 1787 | |
| 1788 | return InstTemplate; |
| 1789 | } |
| 1790 | |
| 1791 | Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) { |
| 1792 | CXXRecordDecl *PrevDecl = nullptr; |
| 1793 | if (D->isInjectedClassName()) |
| 1794 | PrevDecl = cast<CXXRecordDecl>(Owner); |
| 1795 | else if (CXXRecordDecl *PatternPrev = getPreviousDeclForInstantiation(D)) { |
| 1796 | NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(), |
| 1797 | PatternPrev, |
| 1798 | TemplateArgs); |
| 1799 | if (!Prev) return nullptr; |
| 1800 | PrevDecl = cast<CXXRecordDecl>(Prev); |
| 1801 | } |
| 1802 | |
| 1803 | CXXRecordDecl *Record = CXXRecordDecl::Create( |
| 1804 | SemaRef.Context, D->getTagKind(), Owner, D->getBeginLoc(), |
| 1805 | D->getLocation(), D->getIdentifier(), PrevDecl); |
| 1806 | |
| 1807 | // Substitute the nested name specifier, if any. |
| 1808 | if (SubstQualifier(D, Record)) |
| 1809 | return nullptr; |
| 1810 | |
| 1811 | SemaRef.InstantiateAttrsForDecl(TemplateArgs, D, Record, LateAttrs, |
| 1812 | StartingScope); |
| 1813 | |
| 1814 | Record->setImplicit(D->isImplicit()); |
| 1815 | // FIXME: Check against AS_none is an ugly hack to work around the issue that |
| 1816 | // the tag decls introduced by friend class declarations don't have an access |
| 1817 | // specifier. Remove once this area of the code gets sorted out. |
| 1818 | if (D->getAccess() != AS_none) |
| 1819 | Record->setAccess(D->getAccess()); |
| 1820 | if (!D->isInjectedClassName()) |
| 1821 | Record->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation); |
| 1822 | |
| 1823 | // If the original function was part of a friend declaration, |
| 1824 | // inherit its namespace state. |
| 1825 | if (D->getFriendObjectKind()) |
| 1826 | Record->setObjectOfFriendDecl(); |
| 1827 | |
| 1828 | // Make sure that anonymous structs and unions are recorded. |
| 1829 | if (D->isAnonymousStructOrUnion()) |
| 1830 | Record->setAnonymousStructOrUnion(true); |
| 1831 | |
| 1832 | if (D->isLocalClass()) |
| 1833 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Record); |
| 1834 | |
| 1835 | // Forward the mangling number from the template to the instantiated decl. |
| 1836 | SemaRef.Context.setManglingNumber(Record, |
| 1837 | SemaRef.Context.getManglingNumber(D)); |
| 1838 | |
| 1839 | // See if the old tag was defined along with a declarator. |
| 1840 | // If it did, mark the new tag as being associated with that declarator. |
| 1841 | if (DeclaratorDecl *DD = SemaRef.Context.getDeclaratorForUnnamedTagDecl(D)) |
| 1842 | SemaRef.Context.addDeclaratorForUnnamedTagDecl(Record, DD); |
| 1843 | |
| 1844 | // See if the old tag was defined along with a typedef. |
| 1845 | // If it did, mark the new tag as being associated with that typedef. |
| 1846 | if (TypedefNameDecl *TND = SemaRef.Context.getTypedefNameForUnnamedTagDecl(D)) |
| 1847 | SemaRef.Context.addTypedefNameForUnnamedTagDecl(Record, TND); |
| 1848 | |
| 1849 | Owner->addDecl(Record); |
| 1850 | |
| 1851 | // DR1484 clarifies that the members of a local class are instantiated as part |
| 1852 | // of the instantiation of their enclosing entity. |
| 1853 | if (D->isCompleteDefinition() && D->isLocalClass()) { |
| 1854 | Sema::LocalEagerInstantiationScope LocalInstantiations(SemaRef); |
| 1855 | |
| 1856 | SemaRef.InstantiateClass(D->getLocation(), Record, D, TemplateArgs, |
| 1857 | TSK_ImplicitInstantiation, |
| 1858 | /*Complain=*/true); |
| 1859 | |
| 1860 | // For nested local classes, we will instantiate the members when we |
| 1861 | // reach the end of the outermost (non-nested) local class. |
| 1862 | if (!D->isCXXClassMember()) |
| 1863 | SemaRef.InstantiateClassMembers(D->getLocation(), Record, TemplateArgs, |
| 1864 | TSK_ImplicitInstantiation); |
| 1865 | |
| 1866 | // This class may have local implicit instantiations that need to be |
| 1867 | // performed within this scope. |
| 1868 | LocalInstantiations.perform(); |
| 1869 | } |
| 1870 | |
| 1871 | SemaRef.DiagnoseUnusedNestedTypedefs(Record); |
| 1872 | |
| 1873 | return Record; |
| 1874 | } |
| 1875 | |
| 1876 | /// Adjust the given function type for an instantiation of the |
| 1877 | /// given declaration, to cope with modifications to the function's type that |
| 1878 | /// aren't reflected in the type-source information. |
| 1879 | /// |
| 1880 | /// \param D The declaration we're instantiating. |
| 1881 | /// \param TInfo The already-instantiated type. |
| 1882 | static QualType adjustFunctionTypeForInstantiation(ASTContext &Context, |
| 1883 | FunctionDecl *D, |
| 1884 | TypeSourceInfo *TInfo) { |
| 1885 | const FunctionProtoType *OrigFunc |
| 1886 | = D->getType()->castAs<FunctionProtoType>(); |
| 1887 | const FunctionProtoType *NewFunc |
| 1888 | = TInfo->getType()->castAs<FunctionProtoType>(); |
| 1889 | if (OrigFunc->getExtInfo() == NewFunc->getExtInfo()) |
| 1890 | return TInfo->getType(); |
| 1891 | |
| 1892 | FunctionProtoType::ExtProtoInfo NewEPI = NewFunc->getExtProtoInfo(); |
| 1893 | NewEPI.ExtInfo = OrigFunc->getExtInfo(); |
| 1894 | return Context.getFunctionType(NewFunc->getReturnType(), |
| 1895 | NewFunc->getParamTypes(), NewEPI); |
| 1896 | } |
| 1897 | |
| 1898 | /// Normal class members are of more specific types and therefore |
| 1899 | /// don't make it here. This function serves three purposes: |
| 1900 | /// 1) instantiating function templates |
| 1901 | /// 2) substituting friend declarations |
| 1902 | /// 3) substituting deduction guide declarations for nested class templates |
| 1903 | Decl *TemplateDeclInstantiator::VisitFunctionDecl( |
| 1904 | FunctionDecl *D, TemplateParameterList *TemplateParams, |
| 1905 | RewriteKind FunctionRewriteKind) { |
| 1906 | // Check whether there is already a function template specialization for |
| 1907 | // this declaration. |
| 1908 | FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate(); |
| 1909 | if (FunctionTemplate && !TemplateParams) { |
| 1910 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
| 1911 | |
| 1912 | void *InsertPos = nullptr; |
| 1913 | FunctionDecl *SpecFunc |
| 1914 | = FunctionTemplate->findSpecialization(Innermost, InsertPos); |
| 1915 | |
| 1916 | // If we already have a function template specialization, return it. |
| 1917 | if (SpecFunc) |
| 1918 | return SpecFunc; |
| 1919 | } |
| 1920 | |
| 1921 | bool isFriend; |
| 1922 | if (FunctionTemplate) |
| 1923 | isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None); |
| 1924 | else |
| 1925 | isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
| 1926 | |
| 1927 | bool MergeWithParentScope = (TemplateParams != nullptr) || |
| 1928 | Owner->isFunctionOrMethod() || |
| 1929 | !(isa<Decl>(Owner) && |
| 1930 | cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod()); |
| 1931 | LocalInstantiationScope Scope(SemaRef, MergeWithParentScope); |
| 1932 | |
| 1933 | ExplicitSpecifier InstantiatedExplicitSpecifier; |
| 1934 | if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D)) { |
| 1935 | InstantiatedExplicitSpecifier = instantiateExplicitSpecifier( |
| 1936 | SemaRef, TemplateArgs, DGuide->getExplicitSpecifier(), DGuide); |
| 1937 | if (InstantiatedExplicitSpecifier.isInvalid()) |
| 1938 | return nullptr; |
| 1939 | } |
| 1940 | |
| 1941 | SmallVector<ParmVarDecl *, 4> Params; |
| 1942 | TypeSourceInfo *TInfo = SubstFunctionType(D, Params); |
| 1943 | if (!TInfo) |
| 1944 | return nullptr; |
| 1945 | QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo); |
| 1946 | |
| 1947 | if (TemplateParams && TemplateParams->size()) { |
| 1948 | auto *LastParam = |
| 1949 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->asArray().back()); |
| 1950 | if (LastParam && LastParam->isImplicit() && |
| 1951 | LastParam->hasTypeConstraint()) { |
| 1952 | // In abbreviated templates, the type-constraints of invented template |
| 1953 | // type parameters are instantiated with the function type, invalidating |
| 1954 | // the TemplateParameterList which relied on the template type parameter |
| 1955 | // not having a type constraint. Recreate the TemplateParameterList with |
| 1956 | // the updated parameter list. |
| 1957 | TemplateParams = TemplateParameterList::Create( |
| 1958 | SemaRef.Context, TemplateParams->getTemplateLoc(), |
| 1959 | TemplateParams->getLAngleLoc(), TemplateParams->asArray(), |
| 1960 | TemplateParams->getRAngleLoc(), TemplateParams->getRequiresClause()); |
| 1961 | } |
| 1962 | } |
| 1963 | |
| 1964 | NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc(); |
| 1965 | if (QualifierLoc) { |
| 1966 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
| 1967 | TemplateArgs); |
| 1968 | if (!QualifierLoc) |
| 1969 | return nullptr; |
| 1970 | } |
| 1971 | |
| 1972 | // FIXME: Concepts: Do not substitute into constraint expressions |
| 1973 | Expr *TrailingRequiresClause = D->getTrailingRequiresClause(); |
| 1974 | if (TrailingRequiresClause) { |
| 1975 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 1976 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
| 1977 | ExprResult SubstRC = SemaRef.SubstExpr(TrailingRequiresClause, |
| 1978 | TemplateArgs); |
| 1979 | if (SubstRC.isInvalid()) |
| 1980 | return nullptr; |
| 1981 | TrailingRequiresClause = SubstRC.get(); |
| 1982 | if (!SemaRef.CheckConstraintExpression(TrailingRequiresClause)) |
| 1983 | return nullptr; |
| 1984 | } |
| 1985 | |
| 1986 | // If we're instantiating a local function declaration, put the result |
| 1987 | // in the enclosing namespace; otherwise we need to find the instantiated |
| 1988 | // context. |
| 1989 | DeclContext *DC; |
| 1990 | if (D->isLocalExternDecl()) { |
| 1991 | DC = Owner; |
| 1992 | SemaRef.adjustContextForLocalExternDecl(DC); |
| 1993 | } else if (isFriend && QualifierLoc) { |
| 1994 | CXXScopeSpec SS; |
| 1995 | SS.Adopt(QualifierLoc); |
| 1996 | DC = SemaRef.computeDeclContext(SS); |
| 1997 | if (!DC) return nullptr; |
| 1998 | } else { |
| 1999 | DC = SemaRef.FindInstantiatedContext(D->getLocation(), D->getDeclContext(), |
| 2000 | TemplateArgs); |
| 2001 | } |
| 2002 | |
| 2003 | DeclarationNameInfo NameInfo |
| 2004 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
| 2005 | |
| 2006 | if (FunctionRewriteKind != RewriteKind::None) |
| 2007 | adjustForRewrite(FunctionRewriteKind, D, T, TInfo, NameInfo); |
| 2008 | |
| 2009 | FunctionDecl *Function; |
| 2010 | if (auto *DGuide = dyn_cast<CXXDeductionGuideDecl>(D)) { |
| 2011 | Function = CXXDeductionGuideDecl::Create( |
| 2012 | SemaRef.Context, DC, D->getInnerLocStart(), |
| 2013 | InstantiatedExplicitSpecifier, NameInfo, T, TInfo, |
| 2014 | D->getSourceRange().getEnd()); |
| 2015 | if (DGuide->isCopyDeductionCandidate()) |
| 2016 | cast<CXXDeductionGuideDecl>(Function)->setIsCopyDeductionCandidate(); |
| 2017 | Function->setAccess(D->getAccess()); |
| 2018 | } else { |
| 2019 | Function = FunctionDecl::Create( |
| 2020 | SemaRef.Context, DC, D->getInnerLocStart(), NameInfo, T, TInfo, |
| 2021 | D->getCanonicalDecl()->getStorageClass(), D->isInlineSpecified(), |
| 2022 | D->hasWrittenPrototype(), D->getConstexprKind(), |
| 2023 | TrailingRequiresClause); |
| 2024 | Function->setRangeEnd(D->getSourceRange().getEnd()); |
| 2025 | } |
| 2026 | |
| 2027 | if (D->isInlined()) |
| 2028 | Function->setImplicitlyInline(); |
| 2029 | |
| 2030 | if (QualifierLoc) |
| 2031 | Function->setQualifierInfo(QualifierLoc); |
| 2032 | |
| 2033 | if (D->isLocalExternDecl()) |
| 2034 | Function->setLocalExternDecl(); |
| 2035 | |
| 2036 | DeclContext *LexicalDC = Owner; |
| 2037 | if (!isFriend && D->isOutOfLine() && !D->isLocalExternDecl()) { |
| 2038 | assert(D->getDeclContext()->isFileContext())((D->getDeclContext()->isFileContext()) ? static_cast< void> (0) : __assert_fail ("D->getDeclContext()->isFileContext()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2038, __PRETTY_FUNCTION__)); |
| 2039 | LexicalDC = D->getDeclContext(); |
| 2040 | } |
| 2041 | |
| 2042 | Function->setLexicalDeclContext(LexicalDC); |
| 2043 | |
| 2044 | // Attach the parameters |
| 2045 | for (unsigned P = 0; P < Params.size(); ++P) |
| 2046 | if (Params[P]) |
| 2047 | Params[P]->setOwningFunction(Function); |
| 2048 | Function->setParams(Params); |
| 2049 | |
| 2050 | if (TrailingRequiresClause) |
| 2051 | Function->setTrailingRequiresClause(TrailingRequiresClause); |
| 2052 | |
| 2053 | if (TemplateParams) { |
| 2054 | // Our resulting instantiation is actually a function template, since we |
| 2055 | // are substituting only the outer template parameters. For example, given |
| 2056 | // |
| 2057 | // template<typename T> |
| 2058 | // struct X { |
| 2059 | // template<typename U> friend void f(T, U); |
| 2060 | // }; |
| 2061 | // |
| 2062 | // X<int> x; |
| 2063 | // |
| 2064 | // We are instantiating the friend function template "f" within X<int>, |
| 2065 | // which means substituting int for T, but leaving "f" as a friend function |
| 2066 | // template. |
| 2067 | // Build the function template itself. |
| 2068 | FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, DC, |
| 2069 | Function->getLocation(), |
| 2070 | Function->getDeclName(), |
| 2071 | TemplateParams, Function); |
| 2072 | Function->setDescribedFunctionTemplate(FunctionTemplate); |
| 2073 | |
| 2074 | FunctionTemplate->setLexicalDeclContext(LexicalDC); |
| 2075 | |
| 2076 | if (isFriend && D->isThisDeclarationADefinition()) { |
| 2077 | FunctionTemplate->setInstantiatedFromMemberTemplate( |
| 2078 | D->getDescribedFunctionTemplate()); |
| 2079 | } |
| 2080 | } else if (FunctionTemplate) { |
| 2081 | // Record this function template specialization. |
| 2082 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
| 2083 | Function->setFunctionTemplateSpecialization(FunctionTemplate, |
| 2084 | TemplateArgumentList::CreateCopy(SemaRef.Context, |
| 2085 | Innermost), |
| 2086 | /*InsertPos=*/nullptr); |
| 2087 | } else if (isFriend && D->isThisDeclarationADefinition()) { |
| 2088 | // Do not connect the friend to the template unless it's actually a |
| 2089 | // definition. We don't want non-template functions to be marked as being |
| 2090 | // template instantiations. |
| 2091 | Function->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation); |
| 2092 | } |
| 2093 | |
| 2094 | if (isFriend) { |
| 2095 | Function->setObjectOfFriendDecl(); |
| 2096 | if (FunctionTemplateDecl *FT = Function->getDescribedFunctionTemplate()) |
| 2097 | FT->setObjectOfFriendDecl(); |
| 2098 | } |
| 2099 | |
| 2100 | if (InitFunctionInstantiation(Function, D)) |
| 2101 | Function->setInvalidDecl(); |
| 2102 | |
| 2103 | bool IsExplicitSpecialization = false; |
| 2104 | |
| 2105 | LookupResult Previous( |
| 2106 | SemaRef, Function->getDeclName(), SourceLocation(), |
| 2107 | D->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage |
| 2108 | : Sema::LookupOrdinaryName, |
| 2109 | D->isLocalExternDecl() ? Sema::ForExternalRedeclaration |
| 2110 | : SemaRef.forRedeclarationInCurContext()); |
| 2111 | |
| 2112 | if (DependentFunctionTemplateSpecializationInfo *Info |
| 2113 | = D->getDependentSpecializationInfo()) { |
| 2114 | assert(isFriend && "non-friend has dependent specialization info?")((isFriend && "non-friend has dependent specialization info?" ) ? static_cast<void> (0) : __assert_fail ("isFriend && \"non-friend has dependent specialization info?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2114, __PRETTY_FUNCTION__)); |
| 2115 | |
| 2116 | // Instantiate the explicit template arguments. |
| 2117 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
| 2118 | Info->getRAngleLoc()); |
| 2119 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
| 2120 | ExplicitArgs, TemplateArgs)) |
| 2121 | return nullptr; |
| 2122 | |
| 2123 | // Map the candidate templates to their instantiations. |
| 2124 | for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) { |
| 2125 | Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(), |
| 2126 | Info->getTemplate(I), |
| 2127 | TemplateArgs); |
| 2128 | if (!Temp) return nullptr; |
| 2129 | |
| 2130 | Previous.addDecl(cast<FunctionTemplateDecl>(Temp)); |
| 2131 | } |
| 2132 | |
| 2133 | if (SemaRef.CheckFunctionTemplateSpecialization(Function, |
| 2134 | &ExplicitArgs, |
| 2135 | Previous)) |
| 2136 | Function->setInvalidDecl(); |
| 2137 | |
| 2138 | IsExplicitSpecialization = true; |
| 2139 | } else if (const ASTTemplateArgumentListInfo *Info = |
| 2140 | D->getTemplateSpecializationArgsAsWritten()) { |
| 2141 | // The name of this function was written as a template-id. |
| 2142 | SemaRef.LookupQualifiedName(Previous, DC); |
| 2143 | |
| 2144 | // Instantiate the explicit template arguments. |
| 2145 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
| 2146 | Info->getRAngleLoc()); |
| 2147 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
| 2148 | ExplicitArgs, TemplateArgs)) |
| 2149 | return nullptr; |
| 2150 | |
| 2151 | if (SemaRef.CheckFunctionTemplateSpecialization(Function, |
| 2152 | &ExplicitArgs, |
| 2153 | Previous)) |
| 2154 | Function->setInvalidDecl(); |
| 2155 | |
| 2156 | IsExplicitSpecialization = true; |
| 2157 | } else if (TemplateParams || !FunctionTemplate) { |
| 2158 | // Look only into the namespace where the friend would be declared to |
| 2159 | // find a previous declaration. This is the innermost enclosing namespace, |
| 2160 | // as described in ActOnFriendFunctionDecl. |
| 2161 | SemaRef.LookupQualifiedName(Previous, DC->getRedeclContext()); |
| 2162 | |
| 2163 | // In C++, the previous declaration we find might be a tag type |
| 2164 | // (class or enum). In this case, the new declaration will hide the |
| 2165 | // tag type. Note that this does does not apply if we're declaring a |
| 2166 | // typedef (C++ [dcl.typedef]p4). |
| 2167 | if (Previous.isSingleTagDecl()) |
| 2168 | Previous.clear(); |
| 2169 | |
| 2170 | // Filter out previous declarations that don't match the scope. The only |
| 2171 | // effect this has is to remove declarations found in inline namespaces |
| 2172 | // for friend declarations with unqualified names. |
| 2173 | SemaRef.FilterLookupForScope(Previous, DC, /*Scope*/ nullptr, |
| 2174 | /*ConsiderLinkage*/ true, |
| 2175 | QualifierLoc.hasQualifier()); |
| 2176 | } |
| 2177 | |
| 2178 | SemaRef.CheckFunctionDeclaration(/*Scope*/ nullptr, Function, Previous, |
| 2179 | IsExplicitSpecialization); |
| 2180 | |
| 2181 | // Check the template parameter list against the previous declaration. The |
| 2182 | // goal here is to pick up default arguments added since the friend was |
| 2183 | // declared; we know the template parameter lists match, since otherwise |
| 2184 | // we would not have picked this template as the previous declaration. |
| 2185 | if (isFriend && TemplateParams && FunctionTemplate->getPreviousDecl()) { |
| 2186 | SemaRef.CheckTemplateParameterList( |
| 2187 | TemplateParams, |
| 2188 | FunctionTemplate->getPreviousDecl()->getTemplateParameters(), |
| 2189 | Function->isThisDeclarationADefinition() |
| 2190 | ? Sema::TPC_FriendFunctionTemplateDefinition |
| 2191 | : Sema::TPC_FriendFunctionTemplate); |
| 2192 | } |
| 2193 | |
| 2194 | // If we're introducing a friend definition after the first use, trigger |
| 2195 | // instantiation. |
| 2196 | // FIXME: If this is a friend function template definition, we should check |
| 2197 | // to see if any specializations have been used. |
| 2198 | if (isFriend && D->isThisDeclarationADefinition() && Function->isUsed(false)) { |
| 2199 | if (MemberSpecializationInfo *MSInfo = |
| 2200 | Function->getMemberSpecializationInfo()) { |
| 2201 | if (MSInfo->getPointOfInstantiation().isInvalid()) { |
| 2202 | SourceLocation Loc = D->getLocation(); // FIXME |
| 2203 | MSInfo->setPointOfInstantiation(Loc); |
| 2204 | SemaRef.PendingLocalImplicitInstantiations.push_back( |
| 2205 | std::make_pair(Function, Loc)); |
| 2206 | } |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | if (D->isExplicitlyDefaulted()) { |
| 2211 | if (SubstDefaultedFunction(Function, D)) |
| 2212 | return nullptr; |
| 2213 | } |
| 2214 | if (D->isDeleted()) |
| 2215 | SemaRef.SetDeclDeleted(Function, D->getLocation()); |
| 2216 | |
| 2217 | NamedDecl *PrincipalDecl = |
| 2218 | (TemplateParams ? cast<NamedDecl>(FunctionTemplate) : Function); |
| 2219 | |
| 2220 | // If this declaration lives in a different context from its lexical context, |
| 2221 | // add it to the corresponding lookup table. |
| 2222 | if (isFriend || |
| 2223 | (Function->isLocalExternDecl() && !Function->getPreviousDecl())) |
| 2224 | DC->makeDeclVisibleInContext(PrincipalDecl); |
| 2225 | |
| 2226 | if (Function->isOverloadedOperator() && !DC->isRecord() && |
| 2227 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) |
| 2228 | PrincipalDecl->setNonMemberOperator(); |
| 2229 | |
| 2230 | return Function; |
| 2231 | } |
| 2232 | |
| 2233 | Decl *TemplateDeclInstantiator::VisitCXXMethodDecl( |
| 2234 | CXXMethodDecl *D, TemplateParameterList *TemplateParams, |
| 2235 | Optional<const ASTTemplateArgumentListInfo *> ClassScopeSpecializationArgs, |
| 2236 | RewriteKind FunctionRewriteKind) { |
| 2237 | FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate(); |
| 2238 | if (FunctionTemplate && !TemplateParams) { |
| 2239 | // We are creating a function template specialization from a function |
| 2240 | // template. Check whether there is already a function template |
| 2241 | // specialization for this particular set of template arguments. |
| 2242 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
| 2243 | |
| 2244 | void *InsertPos = nullptr; |
| 2245 | FunctionDecl *SpecFunc |
| 2246 | = FunctionTemplate->findSpecialization(Innermost, InsertPos); |
| 2247 | |
| 2248 | // If we already have a function template specialization, return it. |
| 2249 | if (SpecFunc) |
| 2250 | return SpecFunc; |
| 2251 | } |
| 2252 | |
| 2253 | bool isFriend; |
| 2254 | if (FunctionTemplate) |
| 2255 | isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None); |
| 2256 | else |
| 2257 | isFriend = (D->getFriendObjectKind() != Decl::FOK_None); |
| 2258 | |
| 2259 | bool MergeWithParentScope = (TemplateParams != nullptr) || |
| 2260 | !(isa<Decl>(Owner) && |
| 2261 | cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod()); |
| 2262 | LocalInstantiationScope Scope(SemaRef, MergeWithParentScope); |
| 2263 | |
| 2264 | // Instantiate enclosing template arguments for friends. |
| 2265 | SmallVector<TemplateParameterList *, 4> TempParamLists; |
| 2266 | unsigned NumTempParamLists = 0; |
| 2267 | if (isFriend && (NumTempParamLists = D->getNumTemplateParameterLists())) { |
| 2268 | TempParamLists.resize(NumTempParamLists); |
| 2269 | for (unsigned I = 0; I != NumTempParamLists; ++I) { |
| 2270 | TemplateParameterList *TempParams = D->getTemplateParameterList(I); |
| 2271 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 2272 | if (!InstParams) |
| 2273 | return nullptr; |
| 2274 | TempParamLists[I] = InstParams; |
| 2275 | } |
| 2276 | } |
| 2277 | |
| 2278 | ExplicitSpecifier InstantiatedExplicitSpecifier = |
| 2279 | instantiateExplicitSpecifier(SemaRef, TemplateArgs, |
| 2280 | ExplicitSpecifier::getFromDecl(D), D); |
| 2281 | if (InstantiatedExplicitSpecifier.isInvalid()) |
| 2282 | return nullptr; |
| 2283 | |
| 2284 | SmallVector<ParmVarDecl *, 4> Params; |
| 2285 | TypeSourceInfo *TInfo = SubstFunctionType(D, Params); |
| 2286 | if (!TInfo) |
| 2287 | return nullptr; |
| 2288 | QualType T = adjustFunctionTypeForInstantiation(SemaRef.Context, D, TInfo); |
| 2289 | |
| 2290 | if (TemplateParams && TemplateParams->size()) { |
| 2291 | auto *LastParam = |
| 2292 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->asArray().back()); |
| 2293 | if (LastParam && LastParam->isImplicit() && |
| 2294 | LastParam->hasTypeConstraint()) { |
| 2295 | // In abbreviated templates, the type-constraints of invented template |
| 2296 | // type parameters are instantiated with the function type, invalidating |
| 2297 | // the TemplateParameterList which relied on the template type parameter |
| 2298 | // not having a type constraint. Recreate the TemplateParameterList with |
| 2299 | // the updated parameter list. |
| 2300 | TemplateParams = TemplateParameterList::Create( |
| 2301 | SemaRef.Context, TemplateParams->getTemplateLoc(), |
| 2302 | TemplateParams->getLAngleLoc(), TemplateParams->asArray(), |
| 2303 | TemplateParams->getRAngleLoc(), TemplateParams->getRequiresClause()); |
| 2304 | } |
| 2305 | } |
| 2306 | |
| 2307 | NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc(); |
| 2308 | if (QualifierLoc) { |
| 2309 | QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, |
| 2310 | TemplateArgs); |
| 2311 | if (!QualifierLoc) |
| 2312 | return nullptr; |
| 2313 | } |
| 2314 | |
| 2315 | // FIXME: Concepts: Do not substitute into constraint expressions |
| 2316 | Expr *TrailingRequiresClause = D->getTrailingRequiresClause(); |
| 2317 | if (TrailingRequiresClause) { |
| 2318 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 2319 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
| 2320 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
| 2321 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, |
| 2322 | D->getMethodQualifiers(), ThisContext); |
| 2323 | ExprResult SubstRC = SemaRef.SubstExpr(TrailingRequiresClause, |
| 2324 | TemplateArgs); |
| 2325 | if (SubstRC.isInvalid()) |
| 2326 | return nullptr; |
| 2327 | TrailingRequiresClause = SubstRC.get(); |
| 2328 | if (!SemaRef.CheckConstraintExpression(TrailingRequiresClause)) |
| 2329 | return nullptr; |
| 2330 | } |
| 2331 | |
| 2332 | DeclContext *DC = Owner; |
| 2333 | if (isFriend) { |
| 2334 | if (QualifierLoc) { |
| 2335 | CXXScopeSpec SS; |
| 2336 | SS.Adopt(QualifierLoc); |
| 2337 | DC = SemaRef.computeDeclContext(SS); |
| 2338 | |
| 2339 | if (DC && SemaRef.RequireCompleteDeclContext(SS, DC)) |
| 2340 | return nullptr; |
| 2341 | } else { |
| 2342 | DC = SemaRef.FindInstantiatedContext(D->getLocation(), |
| 2343 | D->getDeclContext(), |
| 2344 | TemplateArgs); |
| 2345 | } |
| 2346 | if (!DC) return nullptr; |
| 2347 | } |
| 2348 | |
| 2349 | DeclarationNameInfo NameInfo |
| 2350 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
| 2351 | |
| 2352 | if (FunctionRewriteKind != RewriteKind::None) |
| 2353 | adjustForRewrite(FunctionRewriteKind, D, T, TInfo, NameInfo); |
| 2354 | |
| 2355 | // Build the instantiated method declaration. |
| 2356 | CXXRecordDecl *Record = cast<CXXRecordDecl>(DC); |
| 2357 | CXXMethodDecl *Method = nullptr; |
| 2358 | |
| 2359 | SourceLocation StartLoc = D->getInnerLocStart(); |
| 2360 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) { |
| 2361 | Method = CXXConstructorDecl::Create( |
| 2362 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
| 2363 | InstantiatedExplicitSpecifier, Constructor->isInlineSpecified(), false, |
| 2364 | Constructor->getConstexprKind(), InheritedConstructor(), |
| 2365 | TrailingRequiresClause); |
| 2366 | Method->setRangeEnd(Constructor->getEndLoc()); |
| 2367 | } else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(D)) { |
| 2368 | Method = CXXDestructorDecl::Create( |
| 2369 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
| 2370 | Destructor->isInlineSpecified(), false, Destructor->getConstexprKind(), |
| 2371 | TrailingRequiresClause); |
| 2372 | Method->setRangeEnd(Destructor->getEndLoc()); |
| 2373 | } else if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) { |
| 2374 | Method = CXXConversionDecl::Create( |
| 2375 | SemaRef.Context, Record, StartLoc, NameInfo, T, TInfo, |
| 2376 | Conversion->isInlineSpecified(), InstantiatedExplicitSpecifier, |
| 2377 | Conversion->getConstexprKind(), Conversion->getEndLoc(), |
| 2378 | TrailingRequiresClause); |
| 2379 | } else { |
| 2380 | StorageClass SC = D->isStatic() ? SC_Static : SC_None; |
| 2381 | Method = CXXMethodDecl::Create(SemaRef.Context, Record, StartLoc, NameInfo, |
| 2382 | T, TInfo, SC, D->isInlineSpecified(), |
| 2383 | D->getConstexprKind(), D->getEndLoc(), |
| 2384 | TrailingRequiresClause); |
| 2385 | } |
| 2386 | |
| 2387 | if (D->isInlined()) |
| 2388 | Method->setImplicitlyInline(); |
| 2389 | |
| 2390 | if (QualifierLoc) |
| 2391 | Method->setQualifierInfo(QualifierLoc); |
| 2392 | |
| 2393 | if (TemplateParams) { |
| 2394 | // Our resulting instantiation is actually a function template, since we |
| 2395 | // are substituting only the outer template parameters. For example, given |
| 2396 | // |
| 2397 | // template<typename T> |
| 2398 | // struct X { |
| 2399 | // template<typename U> void f(T, U); |
| 2400 | // }; |
| 2401 | // |
| 2402 | // X<int> x; |
| 2403 | // |
| 2404 | // We are instantiating the member template "f" within X<int>, which means |
| 2405 | // substituting int for T, but leaving "f" as a member function template. |
| 2406 | // Build the function template itself. |
| 2407 | FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, Record, |
| 2408 | Method->getLocation(), |
| 2409 | Method->getDeclName(), |
| 2410 | TemplateParams, Method); |
| 2411 | if (isFriend) { |
| 2412 | FunctionTemplate->setLexicalDeclContext(Owner); |
| 2413 | FunctionTemplate->setObjectOfFriendDecl(); |
| 2414 | } else if (D->isOutOfLine()) |
| 2415 | FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 2416 | Method->setDescribedFunctionTemplate(FunctionTemplate); |
| 2417 | } else if (FunctionTemplate) { |
| 2418 | // Record this function template specialization. |
| 2419 | ArrayRef<TemplateArgument> Innermost = TemplateArgs.getInnermost(); |
| 2420 | Method->setFunctionTemplateSpecialization(FunctionTemplate, |
| 2421 | TemplateArgumentList::CreateCopy(SemaRef.Context, |
| 2422 | Innermost), |
| 2423 | /*InsertPos=*/nullptr); |
| 2424 | } else if (!isFriend) { |
| 2425 | // Record that this is an instantiation of a member function. |
| 2426 | Method->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation); |
| 2427 | } |
| 2428 | |
| 2429 | // If we are instantiating a member function defined |
| 2430 | // out-of-line, the instantiation will have the same lexical |
| 2431 | // context (which will be a namespace scope) as the template. |
| 2432 | if (isFriend) { |
| 2433 | if (NumTempParamLists) |
| 2434 | Method->setTemplateParameterListsInfo( |
| 2435 | SemaRef.Context, |
| 2436 | llvm::makeArrayRef(TempParamLists.data(), NumTempParamLists)); |
| 2437 | |
| 2438 | Method->setLexicalDeclContext(Owner); |
| 2439 | Method->setObjectOfFriendDecl(); |
| 2440 | } else if (D->isOutOfLine()) |
| 2441 | Method->setLexicalDeclContext(D->getLexicalDeclContext()); |
| 2442 | |
| 2443 | // Attach the parameters |
| 2444 | for (unsigned P = 0; P < Params.size(); ++P) |
| 2445 | Params[P]->setOwningFunction(Method); |
| 2446 | Method->setParams(Params); |
| 2447 | |
| 2448 | if (InitMethodInstantiation(Method, D)) |
| 2449 | Method->setInvalidDecl(); |
| 2450 | |
| 2451 | LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName, |
| 2452 | Sema::ForExternalRedeclaration); |
| 2453 | |
| 2454 | bool IsExplicitSpecialization = false; |
| 2455 | |
| 2456 | // If the name of this function was written as a template-id, instantiate |
| 2457 | // the explicit template arguments. |
| 2458 | if (DependentFunctionTemplateSpecializationInfo *Info |
| 2459 | = D->getDependentSpecializationInfo()) { |
| 2460 | assert(isFriend && "non-friend has dependent specialization info?")((isFriend && "non-friend has dependent specialization info?" ) ? static_cast<void> (0) : __assert_fail ("isFriend && \"non-friend has dependent specialization info?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2460, __PRETTY_FUNCTION__)); |
| 2461 | |
| 2462 | // Instantiate the explicit template arguments. |
| 2463 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
| 2464 | Info->getRAngleLoc()); |
| 2465 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
| 2466 | ExplicitArgs, TemplateArgs)) |
| 2467 | return nullptr; |
| 2468 | |
| 2469 | // Map the candidate templates to their instantiations. |
| 2470 | for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) { |
| 2471 | Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(), |
| 2472 | Info->getTemplate(I), |
| 2473 | TemplateArgs); |
| 2474 | if (!Temp) return nullptr; |
| 2475 | |
| 2476 | Previous.addDecl(cast<FunctionTemplateDecl>(Temp)); |
| 2477 | } |
| 2478 | |
| 2479 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, |
| 2480 | &ExplicitArgs, |
| 2481 | Previous)) |
| 2482 | Method->setInvalidDecl(); |
| 2483 | |
| 2484 | IsExplicitSpecialization = true; |
| 2485 | } else if (const ASTTemplateArgumentListInfo *Info = |
| 2486 | ClassScopeSpecializationArgs.getValueOr( |
| 2487 | D->getTemplateSpecializationArgsAsWritten())) { |
| 2488 | SemaRef.LookupQualifiedName(Previous, DC); |
| 2489 | |
| 2490 | TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(), |
| 2491 | Info->getRAngleLoc()); |
| 2492 | if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(), |
| 2493 | ExplicitArgs, TemplateArgs)) |
| 2494 | return nullptr; |
| 2495 | |
| 2496 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, |
| 2497 | &ExplicitArgs, |
| 2498 | Previous)) |
| 2499 | Method->setInvalidDecl(); |
| 2500 | |
| 2501 | IsExplicitSpecialization = true; |
| 2502 | } else if (ClassScopeSpecializationArgs) { |
| 2503 | // Class-scope explicit specialization written without explicit template |
| 2504 | // arguments. |
| 2505 | SemaRef.LookupQualifiedName(Previous, DC); |
| 2506 | if (SemaRef.CheckFunctionTemplateSpecialization(Method, nullptr, Previous)) |
| 2507 | Method->setInvalidDecl(); |
| 2508 | |
| 2509 | IsExplicitSpecialization = true; |
| 2510 | } else if (!FunctionTemplate || TemplateParams || isFriend) { |
| 2511 | SemaRef.LookupQualifiedName(Previous, Record); |
| 2512 | |
| 2513 | // In C++, the previous declaration we find might be a tag type |
| 2514 | // (class or enum). In this case, the new declaration will hide the |
| 2515 | // tag type. Note that this does does not apply if we're declaring a |
| 2516 | // typedef (C++ [dcl.typedef]p4). |
| 2517 | if (Previous.isSingleTagDecl()) |
| 2518 | Previous.clear(); |
| 2519 | } |
| 2520 | |
| 2521 | SemaRef.CheckFunctionDeclaration(nullptr, Method, Previous, |
| 2522 | IsExplicitSpecialization); |
| 2523 | |
| 2524 | if (D->isPure()) |
| 2525 | SemaRef.CheckPureMethod(Method, SourceRange()); |
| 2526 | |
| 2527 | // Propagate access. For a non-friend declaration, the access is |
| 2528 | // whatever we're propagating from. For a friend, it should be the |
| 2529 | // previous declaration we just found. |
| 2530 | if (isFriend && Method->getPreviousDecl()) |
| 2531 | Method->setAccess(Method->getPreviousDecl()->getAccess()); |
| 2532 | else |
| 2533 | Method->setAccess(D->getAccess()); |
| 2534 | if (FunctionTemplate) |
| 2535 | FunctionTemplate->setAccess(Method->getAccess()); |
| 2536 | |
| 2537 | SemaRef.CheckOverrideControl(Method); |
| 2538 | |
| 2539 | // If a function is defined as defaulted or deleted, mark it as such now. |
| 2540 | if (D->isExplicitlyDefaulted()) { |
| 2541 | if (SubstDefaultedFunction(Method, D)) |
| 2542 | return nullptr; |
| 2543 | } |
| 2544 | if (D->isDeletedAsWritten()) |
| 2545 | SemaRef.SetDeclDeleted(Method, Method->getLocation()); |
| 2546 | |
| 2547 | // If this is an explicit specialization, mark the implicitly-instantiated |
| 2548 | // template specialization as being an explicit specialization too. |
| 2549 | // FIXME: Is this necessary? |
| 2550 | if (IsExplicitSpecialization && !isFriend) |
| 2551 | SemaRef.CompleteMemberSpecialization(Method, Previous); |
| 2552 | |
| 2553 | // If there's a function template, let our caller handle it. |
| 2554 | if (FunctionTemplate) { |
| 2555 | // do nothing |
| 2556 | |
| 2557 | // Don't hide a (potentially) valid declaration with an invalid one. |
| 2558 | } else if (Method->isInvalidDecl() && !Previous.empty()) { |
| 2559 | // do nothing |
| 2560 | |
| 2561 | // Otherwise, check access to friends and make them visible. |
| 2562 | } else if (isFriend) { |
| 2563 | // We only need to re-check access for methods which we didn't |
| 2564 | // manage to match during parsing. |
| 2565 | if (!D->getPreviousDecl()) |
| 2566 | SemaRef.CheckFriendAccess(Method); |
| 2567 | |
| 2568 | Record->makeDeclVisibleInContext(Method); |
| 2569 | |
| 2570 | // Otherwise, add the declaration. We don't need to do this for |
| 2571 | // class-scope specializations because we'll have matched them with |
| 2572 | // the appropriate template. |
| 2573 | } else { |
| 2574 | Owner->addDecl(Method); |
| 2575 | } |
| 2576 | |
| 2577 | // PR17480: Honor the used attribute to instantiate member function |
| 2578 | // definitions |
| 2579 | if (Method->hasAttr<UsedAttr>()) { |
| 2580 | if (const auto *A = dyn_cast<CXXRecordDecl>(Owner)) { |
| 2581 | SourceLocation Loc; |
| 2582 | if (const MemberSpecializationInfo *MSInfo = |
| 2583 | A->getMemberSpecializationInfo()) |
| 2584 | Loc = MSInfo->getPointOfInstantiation(); |
| 2585 | else if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(A)) |
| 2586 | Loc = Spec->getPointOfInstantiation(); |
| 2587 | SemaRef.MarkFunctionReferenced(Loc, Method); |
| 2588 | } |
| 2589 | } |
| 2590 | |
| 2591 | return Method; |
| 2592 | } |
| 2593 | |
| 2594 | Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) { |
| 2595 | return VisitCXXMethodDecl(D); |
| 2596 | } |
| 2597 | |
| 2598 | Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) { |
| 2599 | return VisitCXXMethodDecl(D); |
| 2600 | } |
| 2601 | |
| 2602 | Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) { |
| 2603 | return VisitCXXMethodDecl(D); |
| 2604 | } |
| 2605 | |
| 2606 | Decl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) { |
| 2607 | return SemaRef.SubstParmVarDecl(D, TemplateArgs, /*indexAdjustment*/ 0, None, |
| 2608 | /*ExpectParameterPack=*/ false); |
| 2609 | } |
| 2610 | |
| 2611 | Decl *TemplateDeclInstantiator::VisitTemplateTypeParmDecl( |
| 2612 | TemplateTypeParmDecl *D) { |
| 2613 | // TODO: don't always clone when decls are refcounted. |
| 2614 | assert(D->getTypeForDecl()->isTemplateTypeParmType())((D->getTypeForDecl()->isTemplateTypeParmType()) ? static_cast <void> (0) : __assert_fail ("D->getTypeForDecl()->isTemplateTypeParmType()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2614, __PRETTY_FUNCTION__)); |
| 2615 | |
| 2616 | Optional<unsigned> NumExpanded; |
| 2617 | |
| 2618 | if (const TypeConstraint *TC = D->getTypeConstraint()) { |
| 2619 | if (D->isPackExpansion() && !D->isExpandedParameterPack()) { |
| 2620 | assert(TC->getTemplateArgsAsWritten() &&((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)) |
| 2621 | "type parameter can only be an expansion when explicit arguments "((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)) |
| 2622 | "are specified")((TC->getTemplateArgsAsWritten() && "type parameter can only be an expansion when explicit arguments " "are specified") ? static_cast<void> (0) : __assert_fail ("TC->getTemplateArgsAsWritten() && \"type parameter can only be an expansion when explicit arguments \" \"are specified\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 2622, __PRETTY_FUNCTION__)); |
| 2623 | // The template type parameter pack's type is a pack expansion of types. |
| 2624 | // Determine whether we need to expand this parameter pack into separate |
| 2625 | // types. |
| 2626 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| 2627 | for (auto &ArgLoc : TC->getTemplateArgsAsWritten()->arguments()) |
| 2628 | SemaRef.collectUnexpandedParameterPacks(ArgLoc, Unexpanded); |
| 2629 | |
| 2630 | // Determine whether the set of unexpanded parameter packs can and should |
| 2631 | // be expanded. |
| 2632 | bool Expand = true; |
| 2633 | bool RetainExpansion = false; |
| 2634 | if (SemaRef.CheckParameterPacksForExpansion( |
| 2635 | cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint()) |
| 2636 | ->getEllipsisLoc(), |
| 2637 | SourceRange(TC->getConceptNameLoc(), |
| 2638 | TC->hasExplicitTemplateArgs() ? |
| 2639 | TC->getTemplateArgsAsWritten()->getRAngleLoc() : |
| 2640 | TC->getConceptNameInfo().getEndLoc()), |
| 2641 | Unexpanded, TemplateArgs, Expand, RetainExpansion, NumExpanded)) |
| 2642 | return nullptr; |
| 2643 | } |
| 2644 | } |
| 2645 | |
| 2646 | TemplateTypeParmDecl *Inst = TemplateTypeParmDecl::Create( |
| 2647 | SemaRef.Context, Owner, D->getBeginLoc(), D->getLocation(), |
| 2648 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), D->getIndex(), |
| 2649 | D->getIdentifier(), D->wasDeclaredWithTypename(), D->isParameterPack(), |
| 2650 | D->hasTypeConstraint(), NumExpanded); |
| 2651 | |
| 2652 | Inst->setAccess(AS_public); |
| 2653 | Inst->setImplicit(D->isImplicit()); |
| 2654 | if (auto *TC = D->getTypeConstraint()) { |
| 2655 | if (!D->isImplicit()) { |
| 2656 | // Invented template parameter type constraints will be instantiated with |
| 2657 | // the corresponding auto-typed parameter as it might reference other |
| 2658 | // parameters. |
| 2659 | |
| 2660 | // TODO: Concepts: do not instantiate the constraint (delayed constraint |
| 2661 | // substitution) |
| 2662 | const ASTTemplateArgumentListInfo *TemplArgInfo |
| 2663 | = TC->getTemplateArgsAsWritten(); |
| 2664 | TemplateArgumentListInfo InstArgs; |
| 2665 | |
| 2666 | if (TemplArgInfo) { |
| 2667 | InstArgs.setLAngleLoc(TemplArgInfo->LAngleLoc); |
| 2668 | InstArgs.setRAngleLoc(TemplArgInfo->RAngleLoc); |
| 2669 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
| 2670 | TemplArgInfo->NumTemplateArgs, |
| 2671 | InstArgs, TemplateArgs)) |
| 2672 | return nullptr; |
| 2673 | } |
| 2674 | if (SemaRef.AttachTypeConstraint( |
| 2675 | TC->getNestedNameSpecifierLoc(), TC->getConceptNameInfo(), |
| 2676 | TC->getNamedConcept(), &InstArgs, Inst, |
| 2677 | D->isParameterPack() |
| 2678 | ? cast<CXXFoldExpr>(TC->getImmediatelyDeclaredConstraint()) |
| 2679 | ->getEllipsisLoc() |
| 2680 | : SourceLocation())) |
| 2681 | return nullptr; |
| 2682 | } |
| 2683 | } |
| 2684 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
| 2685 | TypeSourceInfo *InstantiatedDefaultArg = |
| 2686 | SemaRef.SubstType(D->getDefaultArgumentInfo(), TemplateArgs, |
| 2687 | D->getDefaultArgumentLoc(), D->getDeclName()); |
| 2688 | if (InstantiatedDefaultArg) |
| 2689 | Inst->setDefaultArgument(InstantiatedDefaultArg); |
| 2690 | } |
| 2691 | |
| 2692 | // Introduce this template parameter's instantiation into the instantiation |
| 2693 | // scope. |
| 2694 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
| 2695 | |
| 2696 | return Inst; |
| 2697 | } |
| 2698 | |
| 2699 | Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl( |
| 2700 | NonTypeTemplateParmDecl *D) { |
| 2701 | // Substitute into the type of the non-type template parameter. |
| 2702 | TypeLoc TL = D->getTypeSourceInfo()->getTypeLoc(); |
| 2703 | SmallVector<TypeSourceInfo *, 4> ExpandedParameterPackTypesAsWritten; |
| 2704 | SmallVector<QualType, 4> ExpandedParameterPackTypes; |
| 2705 | bool IsExpandedParameterPack = false; |
| 2706 | TypeSourceInfo *DI; |
| 2707 | QualType T; |
| 2708 | bool Invalid = false; |
| 2709 | |
| 2710 | if (D->isExpandedParameterPack()) { |
| 2711 | // The non-type template parameter pack is an already-expanded pack |
| 2712 | // expansion of types. Substitute into each of the expanded types. |
| 2713 | ExpandedParameterPackTypes.reserve(D->getNumExpansionTypes()); |
| 2714 | ExpandedParameterPackTypesAsWritten.reserve(D->getNumExpansionTypes()); |
| 2715 | for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) { |
| 2716 | TypeSourceInfo *NewDI = |
| 2717 | SemaRef.SubstType(D->getExpansionTypeSourceInfo(I), TemplateArgs, |
| 2718 | D->getLocation(), D->getDeclName()); |
| 2719 | if (!NewDI) |
| 2720 | return nullptr; |
| 2721 | |
| 2722 | QualType NewT = |
| 2723 | SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation()); |
| 2724 | if (NewT.isNull()) |
| 2725 | return nullptr; |
| 2726 | |
| 2727 | ExpandedParameterPackTypesAsWritten.push_back(NewDI); |
| 2728 | ExpandedParameterPackTypes.push_back(NewT); |
| 2729 | } |
| 2730 | |
| 2731 | IsExpandedParameterPack = true; |
| 2732 | DI = D->getTypeSourceInfo(); |
| 2733 | T = DI->getType(); |
| 2734 | } else if (D->isPackExpansion()) { |
| 2735 | // The non-type template parameter pack's type is a pack expansion of types. |
| 2736 | // Determine whether we need to expand this parameter pack into separate |
| 2737 | // types. |
| 2738 | PackExpansionTypeLoc Expansion = TL.castAs<PackExpansionTypeLoc>(); |
| 2739 | TypeLoc Pattern = Expansion.getPatternLoc(); |
| 2740 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| 2741 | SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded); |
| 2742 | |
| 2743 | // Determine whether the set of unexpanded parameter packs can and should |
| 2744 | // be expanded. |
| 2745 | bool Expand = true; |
| 2746 | bool RetainExpansion = false; |
| 2747 | Optional<unsigned> OrigNumExpansions |
| 2748 | = Expansion.getTypePtr()->getNumExpansions(); |
| 2749 | Optional<unsigned> NumExpansions = OrigNumExpansions; |
| 2750 | if (SemaRef.CheckParameterPacksForExpansion(Expansion.getEllipsisLoc(), |
| 2751 | Pattern.getSourceRange(), |
| 2752 | Unexpanded, |
| 2753 | TemplateArgs, |
| 2754 | Expand, RetainExpansion, |
| 2755 | NumExpansions)) |
| 2756 | return nullptr; |
| 2757 | |
| 2758 | if (Expand) { |
| 2759 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
| 2760 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
| 2761 | TypeSourceInfo *NewDI = SemaRef.SubstType(Pattern, TemplateArgs, |
| 2762 | D->getLocation(), |
| 2763 | D->getDeclName()); |
| 2764 | if (!NewDI) |
| 2765 | return nullptr; |
| 2766 | |
| 2767 | QualType NewT = |
| 2768 | SemaRef.CheckNonTypeTemplateParameterType(NewDI, D->getLocation()); |
| 2769 | if (NewT.isNull()) |
| 2770 | return nullptr; |
| 2771 | |
| 2772 | ExpandedParameterPackTypesAsWritten.push_back(NewDI); |
| 2773 | ExpandedParameterPackTypes.push_back(NewT); |
| 2774 | } |
| 2775 | |
| 2776 | // Note that we have an expanded parameter pack. The "type" of this |
| 2777 | // expanded parameter pack is the original expansion type, but callers |
| 2778 | // will end up using the expanded parameter pack types for type-checking. |
| 2779 | IsExpandedParameterPack = true; |
| 2780 | DI = D->getTypeSourceInfo(); |
| 2781 | T = DI->getType(); |
| 2782 | } else { |
| 2783 | // We cannot fully expand the pack expansion now, so substitute into the |
| 2784 | // pattern and create a new pack expansion type. |
| 2785 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
| 2786 | TypeSourceInfo *NewPattern = SemaRef.SubstType(Pattern, TemplateArgs, |
| 2787 | D->getLocation(), |
| 2788 | D->getDeclName()); |
| 2789 | if (!NewPattern) |
| 2790 | return nullptr; |
| 2791 | |
| 2792 | SemaRef.CheckNonTypeTemplateParameterType(NewPattern, D->getLocation()); |
| 2793 | DI = SemaRef.CheckPackExpansion(NewPattern, Expansion.getEllipsisLoc(), |
| 2794 | NumExpansions); |
| 2795 | if (!DI) |
| 2796 | return nullptr; |
| 2797 | |
| 2798 | T = DI->getType(); |
| 2799 | } |
| 2800 | } else { |
| 2801 | // Simple case: substitution into a parameter that is not a parameter pack. |
| 2802 | DI = SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs, |
| 2803 | D->getLocation(), D->getDeclName()); |
| 2804 | if (!DI) |
| 2805 | return nullptr; |
| 2806 | |
| 2807 | // Check that this type is acceptable for a non-type template parameter. |
| 2808 | T = SemaRef.CheckNonTypeTemplateParameterType(DI, D->getLocation()); |
| 2809 | if (T.isNull()) { |
| 2810 | T = SemaRef.Context.IntTy; |
| 2811 | Invalid = true; |
| 2812 | } |
| 2813 | } |
| 2814 | |
| 2815 | NonTypeTemplateParmDecl *Param; |
| 2816 | if (IsExpandedParameterPack) |
| 2817 | Param = NonTypeTemplateParmDecl::Create( |
| 2818 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
| 2819 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
| 2820 | D->getPosition(), D->getIdentifier(), T, DI, ExpandedParameterPackTypes, |
| 2821 | ExpandedParameterPackTypesAsWritten); |
| 2822 | else |
| 2823 | Param = NonTypeTemplateParmDecl::Create( |
| 2824 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
| 2825 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
| 2826 | D->getPosition(), D->getIdentifier(), T, D->isParameterPack(), DI); |
| 2827 | |
| 2828 | if (AutoTypeLoc AutoLoc = DI->getTypeLoc().getContainedAutoTypeLoc()) |
| 2829 | if (AutoLoc.isConstrained()) |
| 2830 | if (SemaRef.AttachTypeConstraint( |
| 2831 | AutoLoc, Param, |
| 2832 | IsExpandedParameterPack |
| 2833 | ? DI->getTypeLoc().getAs<PackExpansionTypeLoc>() |
| 2834 | .getEllipsisLoc() |
| 2835 | : SourceLocation())) |
| 2836 | Invalid = true; |
| 2837 | |
| 2838 | Param->setAccess(AS_public); |
| 2839 | Param->setImplicit(D->isImplicit()); |
| 2840 | if (Invalid) |
| 2841 | Param->setInvalidDecl(); |
| 2842 | |
| 2843 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
| 2844 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 2845 | SemaRef, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 2846 | ExprResult Value = SemaRef.SubstExpr(D->getDefaultArgument(), TemplateArgs); |
| 2847 | if (!Value.isInvalid()) |
| 2848 | Param->setDefaultArgument(Value.get()); |
| 2849 | } |
| 2850 | |
| 2851 | // Introduce this template parameter's instantiation into the instantiation |
| 2852 | // scope. |
| 2853 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param); |
| 2854 | return Param; |
| 2855 | } |
| 2856 | |
| 2857 | static void collectUnexpandedParameterPacks( |
| 2858 | Sema &S, |
| 2859 | TemplateParameterList *Params, |
| 2860 | SmallVectorImpl<UnexpandedParameterPack> &Unexpanded) { |
| 2861 | for (const auto &P : *Params) { |
| 2862 | if (P->isTemplateParameterPack()) |
| 2863 | continue; |
| 2864 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) |
| 2865 | S.collectUnexpandedParameterPacks(NTTP->getTypeSourceInfo()->getTypeLoc(), |
| 2866 | Unexpanded); |
| 2867 | if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(P)) |
| 2868 | collectUnexpandedParameterPacks(S, TTP->getTemplateParameters(), |
| 2869 | Unexpanded); |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | Decl * |
| 2874 | TemplateDeclInstantiator::VisitTemplateTemplateParmDecl( |
| 2875 | TemplateTemplateParmDecl *D) { |
| 2876 | // Instantiate the template parameter list of the template template parameter. |
| 2877 | TemplateParameterList *TempParams = D->getTemplateParameters(); |
| 2878 | TemplateParameterList *InstParams; |
| 2879 | SmallVector<TemplateParameterList*, 8> ExpandedParams; |
| 2880 | |
| 2881 | bool IsExpandedParameterPack = false; |
| 2882 | |
| 2883 | if (D->isExpandedParameterPack()) { |
| 2884 | // The template template parameter pack is an already-expanded pack |
| 2885 | // expansion of template parameters. Substitute into each of the expanded |
| 2886 | // parameters. |
| 2887 | ExpandedParams.reserve(D->getNumExpansionTemplateParameters()); |
| 2888 | for (unsigned I = 0, N = D->getNumExpansionTemplateParameters(); |
| 2889 | I != N; ++I) { |
| 2890 | LocalInstantiationScope Scope(SemaRef); |
| 2891 | TemplateParameterList *Expansion = |
| 2892 | SubstTemplateParams(D->getExpansionTemplateParameters(I)); |
| 2893 | if (!Expansion) |
| 2894 | return nullptr; |
| 2895 | ExpandedParams.push_back(Expansion); |
| 2896 | } |
| 2897 | |
| 2898 | IsExpandedParameterPack = true; |
| 2899 | InstParams = TempParams; |
| 2900 | } else if (D->isPackExpansion()) { |
| 2901 | // The template template parameter pack expands to a pack of template |
| 2902 | // template parameters. Determine whether we need to expand this parameter |
| 2903 | // pack into separate parameters. |
| 2904 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| 2905 | collectUnexpandedParameterPacks(SemaRef, D->getTemplateParameters(), |
| 2906 | Unexpanded); |
| 2907 | |
| 2908 | // Determine whether the set of unexpanded parameter packs can and should |
| 2909 | // be expanded. |
| 2910 | bool Expand = true; |
| 2911 | bool RetainExpansion = false; |
| 2912 | Optional<unsigned> NumExpansions; |
| 2913 | if (SemaRef.CheckParameterPacksForExpansion(D->getLocation(), |
| 2914 | TempParams->getSourceRange(), |
| 2915 | Unexpanded, |
| 2916 | TemplateArgs, |
| 2917 | Expand, RetainExpansion, |
| 2918 | NumExpansions)) |
| 2919 | return nullptr; |
| 2920 | |
| 2921 | if (Expand) { |
| 2922 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
| 2923 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
| 2924 | LocalInstantiationScope Scope(SemaRef); |
| 2925 | TemplateParameterList *Expansion = SubstTemplateParams(TempParams); |
| 2926 | if (!Expansion) |
| 2927 | return nullptr; |
| 2928 | ExpandedParams.push_back(Expansion); |
| 2929 | } |
| 2930 | |
| 2931 | // Note that we have an expanded parameter pack. The "type" of this |
| 2932 | // expanded parameter pack is the original expansion type, but callers |
| 2933 | // will end up using the expanded parameter pack types for type-checking. |
| 2934 | IsExpandedParameterPack = true; |
| 2935 | InstParams = TempParams; |
| 2936 | } else { |
| 2937 | // We cannot fully expand the pack expansion now, so just substitute |
| 2938 | // into the pattern. |
| 2939 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
| 2940 | |
| 2941 | LocalInstantiationScope Scope(SemaRef); |
| 2942 | InstParams = SubstTemplateParams(TempParams); |
| 2943 | if (!InstParams) |
| 2944 | return nullptr; |
| 2945 | } |
| 2946 | } else { |
| 2947 | // Perform the actual substitution of template parameters within a new, |
| 2948 | // local instantiation scope. |
| 2949 | LocalInstantiationScope Scope(SemaRef); |
| 2950 | InstParams = SubstTemplateParams(TempParams); |
| 2951 | if (!InstParams) |
| 2952 | return nullptr; |
| 2953 | } |
| 2954 | |
| 2955 | // Build the template template parameter. |
| 2956 | TemplateTemplateParmDecl *Param; |
| 2957 | if (IsExpandedParameterPack) |
| 2958 | Param = TemplateTemplateParmDecl::Create( |
| 2959 | SemaRef.Context, Owner, D->getLocation(), |
| 2960 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
| 2961 | D->getPosition(), D->getIdentifier(), InstParams, ExpandedParams); |
| 2962 | else |
| 2963 | Param = TemplateTemplateParmDecl::Create( |
| 2964 | SemaRef.Context, Owner, D->getLocation(), |
| 2965 | D->getDepth() - TemplateArgs.getNumSubstitutedLevels(), |
| 2966 | D->getPosition(), D->isParameterPack(), D->getIdentifier(), InstParams); |
| 2967 | if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { |
| 2968 | NestedNameSpecifierLoc QualifierLoc = |
| 2969 | D->getDefaultArgument().getTemplateQualifierLoc(); |
| 2970 | QualifierLoc = |
| 2971 | SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgs); |
| 2972 | TemplateName TName = SemaRef.SubstTemplateName( |
| 2973 | QualifierLoc, D->getDefaultArgument().getArgument().getAsTemplate(), |
| 2974 | D->getDefaultArgument().getTemplateNameLoc(), TemplateArgs); |
| 2975 | if (!TName.isNull()) |
| 2976 | Param->setDefaultArgument( |
| 2977 | SemaRef.Context, |
| 2978 | TemplateArgumentLoc(SemaRef.Context, TemplateArgument(TName), |
| 2979 | D->getDefaultArgument().getTemplateQualifierLoc(), |
| 2980 | D->getDefaultArgument().getTemplateNameLoc())); |
| 2981 | } |
| 2982 | Param->setAccess(AS_public); |
| 2983 | Param->setImplicit(D->isImplicit()); |
| 2984 | |
| 2985 | // Introduce this template parameter's instantiation into the instantiation |
| 2986 | // scope. |
| 2987 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param); |
| 2988 | |
| 2989 | return Param; |
| 2990 | } |
| 2991 | |
| 2992 | Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) { |
| 2993 | // Using directives are never dependent (and never contain any types or |
| 2994 | // expressions), so they require no explicit instantiation work. |
| 2995 | |
| 2996 | UsingDirectiveDecl *Inst |
| 2997 | = UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(), |
| 2998 | D->getNamespaceKeyLocation(), |
| 2999 | D->getQualifierLoc(), |
| 3000 | D->getIdentLocation(), |
| 3001 | D->getNominatedNamespace(), |
| 3002 | D->getCommonAncestor()); |
| 3003 | |
| 3004 | // Add the using directive to its declaration context |
| 3005 | // only if this is not a function or method. |
| 3006 | if (!Owner->isFunctionOrMethod()) |
| 3007 | Owner->addDecl(Inst); |
| 3008 | |
| 3009 | return Inst; |
| 3010 | } |
| 3011 | |
| 3012 | Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) { |
| 3013 | |
| 3014 | // The nested name specifier may be dependent, for example |
| 3015 | // template <typename T> struct t { |
| 3016 | // struct s1 { T f1(); }; |
| 3017 | // struct s2 : s1 { using s1::f1; }; |
| 3018 | // }; |
| 3019 | // template struct t<int>; |
| 3020 | // Here, in using s1::f1, s1 refers to t<T>::s1; |
| 3021 | // we need to substitute for t<int>::s1. |
| 3022 | NestedNameSpecifierLoc QualifierLoc |
| 3023 | = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), |
| 3024 | TemplateArgs); |
| 3025 | if (!QualifierLoc) |
| 3026 | return nullptr; |
| 3027 | |
| 3028 | // For an inheriting constructor declaration, the name of the using |
| 3029 | // declaration is the name of a constructor in this class, not in the |
| 3030 | // base class. |
| 3031 | DeclarationNameInfo NameInfo = D->getNameInfo(); |
| 3032 | if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName) |
| 3033 | if (auto *RD = dyn_cast<CXXRecordDecl>(SemaRef.CurContext)) |
| 3034 | NameInfo.setName(SemaRef.Context.DeclarationNames.getCXXConstructorName( |
| 3035 | SemaRef.Context.getCanonicalType(SemaRef.Context.getRecordType(RD)))); |
| 3036 | |
| 3037 | // We only need to do redeclaration lookups if we're in a class |
| 3038 | // scope (in fact, it's not really even possible in non-class |
| 3039 | // scopes). |
| 3040 | bool CheckRedeclaration = Owner->isRecord(); |
| 3041 | |
| 3042 | LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName, |
| 3043 | Sema::ForVisibleRedeclaration); |
| 3044 | |
| 3045 | UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner, |
| 3046 | D->getUsingLoc(), |
| 3047 | QualifierLoc, |
| 3048 | NameInfo, |
| 3049 | D->hasTypename()); |
| 3050 | |
| 3051 | CXXScopeSpec SS; |
| 3052 | SS.Adopt(QualifierLoc); |
| 3053 | if (CheckRedeclaration) { |
| 3054 | Prev.setHideTags(false); |
| 3055 | SemaRef.LookupQualifiedName(Prev, Owner); |
| 3056 | |
| 3057 | // Check for invalid redeclarations. |
| 3058 | if (SemaRef.CheckUsingDeclRedeclaration(D->getUsingLoc(), |
| 3059 | D->hasTypename(), SS, |
| 3060 | D->getLocation(), Prev)) |
| 3061 | NewUD->setInvalidDecl(); |
| 3062 | |
| 3063 | } |
| 3064 | |
| 3065 | if (!NewUD->isInvalidDecl() && |
| 3066 | SemaRef.CheckUsingDeclQualifier(D->getUsingLoc(), D->hasTypename(), |
| 3067 | SS, NameInfo, D->getLocation())) |
| 3068 | NewUD->setInvalidDecl(); |
| 3069 | |
| 3070 | SemaRef.Context.setInstantiatedFromUsingDecl(NewUD, D); |
| 3071 | NewUD->setAccess(D->getAccess()); |
| 3072 | Owner->addDecl(NewUD); |
| 3073 | |
| 3074 | // Don't process the shadow decls for an invalid decl. |
| 3075 | if (NewUD->isInvalidDecl()) |
| 3076 | return NewUD; |
| 3077 | |
| 3078 | if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName) |
| 3079 | SemaRef.CheckInheritingConstructorUsingDecl(NewUD); |
| 3080 | |
| 3081 | bool isFunctionScope = Owner->isFunctionOrMethod(); |
| 3082 | |
| 3083 | // Process the shadow decls. |
| 3084 | for (auto *Shadow : D->shadows()) { |
| 3085 | // FIXME: UsingShadowDecl doesn't preserve its immediate target, so |
| 3086 | // reconstruct it in the case where it matters. |
| 3087 | NamedDecl *OldTarget = Shadow->getTargetDecl(); |
| 3088 | if (auto *CUSD = dyn_cast<ConstructorUsingShadowDecl>(Shadow)) |
| 3089 | if (auto *BaseShadow = CUSD->getNominatedBaseClassShadowDecl()) |
| 3090 | OldTarget = BaseShadow; |
| 3091 | |
| 3092 | NamedDecl *InstTarget = |
| 3093 | cast_or_null<NamedDecl>(SemaRef.FindInstantiatedDecl( |
| 3094 | Shadow->getLocation(), OldTarget, TemplateArgs)); |
| 3095 | if (!InstTarget) |
| 3096 | return nullptr; |
| 3097 | |
| 3098 | UsingShadowDecl *PrevDecl = nullptr; |
| 3099 | if (CheckRedeclaration) { |
| 3100 | if (SemaRef.CheckUsingShadowDecl(NewUD, InstTarget, Prev, PrevDecl)) |
| 3101 | continue; |
| 3102 | } else if (UsingShadowDecl *OldPrev = |
| 3103 | getPreviousDeclForInstantiation(Shadow)) { |
| 3104 | PrevDecl = cast_or_null<UsingShadowDecl>(SemaRef.FindInstantiatedDecl( |
| 3105 | Shadow->getLocation(), OldPrev, TemplateArgs)); |
| 3106 | } |
| 3107 | |
| 3108 | UsingShadowDecl *InstShadow = |
| 3109 | SemaRef.BuildUsingShadowDecl(/*Scope*/nullptr, NewUD, InstTarget, |
| 3110 | PrevDecl); |
| 3111 | SemaRef.Context.setInstantiatedFromUsingShadowDecl(InstShadow, Shadow); |
| 3112 | |
| 3113 | if (isFunctionScope) |
| 3114 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(Shadow, InstShadow); |
| 3115 | } |
| 3116 | |
| 3117 | return NewUD; |
| 3118 | } |
| 3119 | |
| 3120 | Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) { |
| 3121 | // Ignore these; we handle them in bulk when processing the UsingDecl. |
| 3122 | return nullptr; |
| 3123 | } |
| 3124 | |
| 3125 | Decl *TemplateDeclInstantiator::VisitConstructorUsingShadowDecl( |
| 3126 | ConstructorUsingShadowDecl *D) { |
| 3127 | // Ignore these; we handle them in bulk when processing the UsingDecl. |
| 3128 | return nullptr; |
| 3129 | } |
| 3130 | |
| 3131 | template <typename T> |
| 3132 | Decl *TemplateDeclInstantiator::instantiateUnresolvedUsingDecl( |
| 3133 | T *D, bool InstantiatingPackElement) { |
| 3134 | // If this is a pack expansion, expand it now. |
| 3135 | if (D->isPackExpansion() && !InstantiatingPackElement) { |
| 3136 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| 3137 | SemaRef.collectUnexpandedParameterPacks(D->getQualifierLoc(), Unexpanded); |
| 3138 | SemaRef.collectUnexpandedParameterPacks(D->getNameInfo(), Unexpanded); |
| 3139 | |
| 3140 | // Determine whether the set of unexpanded parameter packs can and should |
| 3141 | // be expanded. |
| 3142 | bool Expand = true; |
| 3143 | bool RetainExpansion = false; |
| 3144 | Optional<unsigned> NumExpansions; |
| 3145 | if (SemaRef.CheckParameterPacksForExpansion( |
| 3146 | D->getEllipsisLoc(), D->getSourceRange(), Unexpanded, TemplateArgs, |
| 3147 | Expand, RetainExpansion, NumExpansions)) |
| 3148 | return nullptr; |
| 3149 | |
| 3150 | // This declaration cannot appear within a function template signature, |
| 3151 | // so we can't have a partial argument list for a parameter pack. |
| 3152 | assert(!RetainExpansion &&((!RetainExpansion && "should never need to retain an expansion for UsingPackDecl" ) ? static_cast<void> (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3153, __PRETTY_FUNCTION__)) |
| 3153 | "should never need to retain an expansion for UsingPackDecl")((!RetainExpansion && "should never need to retain an expansion for UsingPackDecl" ) ? static_cast<void> (0) : __assert_fail ("!RetainExpansion && \"should never need to retain an expansion for UsingPackDecl\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3153, __PRETTY_FUNCTION__)); |
| 3154 | |
| 3155 | if (!Expand) { |
| 3156 | // We cannot fully expand the pack expansion now, so substitute into the |
| 3157 | // pattern and create a new pack expansion. |
| 3158 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1); |
| 3159 | return instantiateUnresolvedUsingDecl(D, true); |
| 3160 | } |
| 3161 | |
| 3162 | // Within a function, we don't have any normal way to check for conflicts |
| 3163 | // between shadow declarations from different using declarations in the |
| 3164 | // same pack expansion, but this is always ill-formed because all expansions |
| 3165 | // must produce (conflicting) enumerators. |
| 3166 | // |
| 3167 | // Sadly we can't just reject this in the template definition because it |
| 3168 | // could be valid if the pack is empty or has exactly one expansion. |
| 3169 | if (D->getDeclContext()->isFunctionOrMethod() && *NumExpansions > 1) { |
| 3170 | SemaRef.Diag(D->getEllipsisLoc(), |
| 3171 | diag::err_using_decl_redeclaration_expansion); |
| 3172 | return nullptr; |
| 3173 | } |
| 3174 | |
| 3175 | // Instantiate the slices of this pack and build a UsingPackDecl. |
| 3176 | SmallVector<NamedDecl*, 8> Expansions; |
| 3177 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
| 3178 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I); |
| 3179 | Decl *Slice = instantiateUnresolvedUsingDecl(D, true); |
| 3180 | if (!Slice) |
| 3181 | return nullptr; |
| 3182 | // Note that we can still get unresolved using declarations here, if we |
| 3183 | // had arguments for all packs but the pattern also contained other |
| 3184 | // template arguments (this only happens during partial substitution, eg |
| 3185 | // into the body of a generic lambda in a function template). |
| 3186 | Expansions.push_back(cast<NamedDecl>(Slice)); |
| 3187 | } |
| 3188 | |
| 3189 | auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions); |
| 3190 | if (isDeclWithinFunction(D)) |
| 3191 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD); |
| 3192 | return NewD; |
| 3193 | } |
| 3194 | |
| 3195 | UnresolvedUsingTypenameDecl *TD = dyn_cast<UnresolvedUsingTypenameDecl>(D); |
| 3196 | SourceLocation TypenameLoc = TD ? TD->getTypenameLoc() : SourceLocation(); |
| 3197 | |
| 3198 | NestedNameSpecifierLoc QualifierLoc |
| 3199 | = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), |
| 3200 | TemplateArgs); |
| 3201 | if (!QualifierLoc) |
| 3202 | return nullptr; |
| 3203 | |
| 3204 | CXXScopeSpec SS; |
| 3205 | SS.Adopt(QualifierLoc); |
| 3206 | |
| 3207 | DeclarationNameInfo NameInfo |
| 3208 | = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs); |
| 3209 | |
| 3210 | // Produce a pack expansion only if we're not instantiating a particular |
| 3211 | // slice of a pack expansion. |
| 3212 | bool InstantiatingSlice = D->getEllipsisLoc().isValid() && |
| 3213 | SemaRef.ArgumentPackSubstitutionIndex != -1; |
| 3214 | SourceLocation EllipsisLoc = |
| 3215 | InstantiatingSlice ? SourceLocation() : D->getEllipsisLoc(); |
| 3216 | |
| 3217 | NamedDecl *UD = SemaRef.BuildUsingDeclaration( |
| 3218 | /*Scope*/ nullptr, D->getAccess(), D->getUsingLoc(), |
| 3219 | /*HasTypename*/ TD, TypenameLoc, SS, NameInfo, EllipsisLoc, |
| 3220 | ParsedAttributesView(), |
| 3221 | /*IsInstantiation*/ true); |
| 3222 | if (UD) |
| 3223 | SemaRef.Context.setInstantiatedFromUsingDecl(UD, D); |
| 3224 | |
| 3225 | return UD; |
| 3226 | } |
| 3227 | |
| 3228 | Decl *TemplateDeclInstantiator::VisitUnresolvedUsingTypenameDecl( |
| 3229 | UnresolvedUsingTypenameDecl *D) { |
| 3230 | return instantiateUnresolvedUsingDecl(D); |
| 3231 | } |
| 3232 | |
| 3233 | Decl *TemplateDeclInstantiator::VisitUnresolvedUsingValueDecl( |
| 3234 | UnresolvedUsingValueDecl *D) { |
| 3235 | return instantiateUnresolvedUsingDecl(D); |
| 3236 | } |
| 3237 | |
| 3238 | Decl *TemplateDeclInstantiator::VisitUsingPackDecl(UsingPackDecl *D) { |
| 3239 | SmallVector<NamedDecl*, 8> Expansions; |
| 3240 | for (auto *UD : D->expansions()) { |
| 3241 | if (NamedDecl *NewUD = |
| 3242 | SemaRef.FindInstantiatedDecl(D->getLocation(), UD, TemplateArgs)) |
| 3243 | Expansions.push_back(NewUD); |
| 3244 | else |
| 3245 | return nullptr; |
| 3246 | } |
| 3247 | |
| 3248 | auto *NewD = SemaRef.BuildUsingPackDecl(D, Expansions); |
| 3249 | if (isDeclWithinFunction(D)) |
| 3250 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewD); |
| 3251 | return NewD; |
| 3252 | } |
| 3253 | |
| 3254 | Decl *TemplateDeclInstantiator::VisitClassScopeFunctionSpecializationDecl( |
| 3255 | ClassScopeFunctionSpecializationDecl *Decl) { |
| 3256 | CXXMethodDecl *OldFD = Decl->getSpecialization(); |
| 3257 | return cast_or_null<CXXMethodDecl>( |
| 3258 | VisitCXXMethodDecl(OldFD, nullptr, Decl->getTemplateArgsAsWritten())); |
| 3259 | } |
| 3260 | |
| 3261 | Decl *TemplateDeclInstantiator::VisitOMPThreadPrivateDecl( |
| 3262 | OMPThreadPrivateDecl *D) { |
| 3263 | SmallVector<Expr *, 5> Vars; |
| 3264 | for (auto *I : D->varlists()) { |
| 3265 | Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get(); |
| 3266 | assert(isa<DeclRefExpr>(Var) && "threadprivate arg is not a DeclRefExpr")((isa<DeclRefExpr>(Var) && "threadprivate arg is not a DeclRefExpr" ) ? static_cast<void> (0) : __assert_fail ("isa<DeclRefExpr>(Var) && \"threadprivate arg is not a DeclRefExpr\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3266, __PRETTY_FUNCTION__)); |
| 3267 | Vars.push_back(Var); |
| 3268 | } |
| 3269 | |
| 3270 | OMPThreadPrivateDecl *TD = |
| 3271 | SemaRef.CheckOMPThreadPrivateDecl(D->getLocation(), Vars); |
| 3272 | |
| 3273 | TD->setAccess(AS_public); |
| 3274 | Owner->addDecl(TD); |
| 3275 | |
| 3276 | return TD; |
| 3277 | } |
| 3278 | |
| 3279 | Decl *TemplateDeclInstantiator::VisitOMPAllocateDecl(OMPAllocateDecl *D) { |
| 3280 | SmallVector<Expr *, 5> Vars; |
| 3281 | for (auto *I : D->varlists()) { |
| 3282 | Expr *Var = SemaRef.SubstExpr(I, TemplateArgs).get(); |
| 3283 | assert(isa<DeclRefExpr>(Var) && "allocate arg is not a DeclRefExpr")((isa<DeclRefExpr>(Var) && "allocate arg is not a DeclRefExpr" ) ? static_cast<void> (0) : __assert_fail ("isa<DeclRefExpr>(Var) && \"allocate arg is not a DeclRefExpr\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3283, __PRETTY_FUNCTION__)); |
| 3284 | Vars.push_back(Var); |
| 3285 | } |
| 3286 | SmallVector<OMPClause *, 4> Clauses; |
| 3287 | // Copy map clauses from the original mapper. |
| 3288 | for (OMPClause *C : D->clauselists()) { |
| 3289 | auto *AC = cast<OMPAllocatorClause>(C); |
| 3290 | ExprResult NewE = SemaRef.SubstExpr(AC->getAllocator(), TemplateArgs); |
| 3291 | if (!NewE.isUsable()) |
| 3292 | continue; |
| 3293 | OMPClause *IC = SemaRef.ActOnOpenMPAllocatorClause( |
| 3294 | NewE.get(), AC->getBeginLoc(), AC->getLParenLoc(), AC->getEndLoc()); |
| 3295 | Clauses.push_back(IC); |
| 3296 | } |
| 3297 | |
| 3298 | Sema::DeclGroupPtrTy Res = SemaRef.ActOnOpenMPAllocateDirective( |
| 3299 | D->getLocation(), Vars, Clauses, Owner); |
| 3300 | if (Res.get().isNull()) |
| 3301 | return nullptr; |
| 3302 | return Res.get().getSingleDecl(); |
| 3303 | } |
| 3304 | |
| 3305 | Decl *TemplateDeclInstantiator::VisitOMPRequiresDecl(OMPRequiresDecl *D) { |
| 3306 | llvm_unreachable(::llvm::llvm_unreachable_internal("Requires directive cannot be instantiated within a dependent context" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3307) |
| 3307 | "Requires directive cannot be instantiated within a dependent context")::llvm::llvm_unreachable_internal("Requires directive cannot be instantiated within a dependent context" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3307); |
| 3308 | } |
| 3309 | |
| 3310 | Decl *TemplateDeclInstantiator::VisitOMPDeclareReductionDecl( |
| 3311 | OMPDeclareReductionDecl *D) { |
| 3312 | // Instantiate type and check if it is allowed. |
| 3313 | const bool RequiresInstantiation = |
| 3314 | D->getType()->isDependentType() || |
| 3315 | D->getType()->isInstantiationDependentType() || |
| 3316 | D->getType()->containsUnexpandedParameterPack(); |
| 3317 | QualType SubstReductionType; |
| 3318 | if (RequiresInstantiation) { |
| 3319 | SubstReductionType = SemaRef.ActOnOpenMPDeclareReductionType( |
| 3320 | D->getLocation(), |
| 3321 | ParsedType::make(SemaRef.SubstType( |
| 3322 | D->getType(), TemplateArgs, D->getLocation(), DeclarationName()))); |
| 3323 | } else { |
| 3324 | SubstReductionType = D->getType(); |
| 3325 | } |
| 3326 | if (SubstReductionType.isNull()) |
| 3327 | return nullptr; |
| 3328 | Expr *Combiner = D->getCombiner(); |
| 3329 | Expr *Init = D->getInitializer(); |
| 3330 | bool IsCorrect = true; |
| 3331 | // Create instantiated copy. |
| 3332 | std::pair<QualType, SourceLocation> ReductionTypes[] = { |
| 3333 | std::make_pair(SubstReductionType, D->getLocation())}; |
| 3334 | auto *PrevDeclInScope = D->getPrevDeclInScope(); |
| 3335 | if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) { |
| 3336 | PrevDeclInScope = cast<OMPDeclareReductionDecl>( |
| 3337 | SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope) |
| 3338 | ->get<Decl *>()); |
| 3339 | } |
| 3340 | auto DRD = SemaRef.ActOnOpenMPDeclareReductionDirectiveStart( |
| 3341 | /*S=*/nullptr, Owner, D->getDeclName(), ReductionTypes, D->getAccess(), |
| 3342 | PrevDeclInScope); |
| 3343 | auto *NewDRD = cast<OMPDeclareReductionDecl>(DRD.get().getSingleDecl()); |
| 3344 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDRD); |
| 3345 | Expr *SubstCombiner = nullptr; |
| 3346 | Expr *SubstInitializer = nullptr; |
| 3347 | // Combiners instantiation sequence. |
| 3348 | if (Combiner) { |
| 3349 | SemaRef.ActOnOpenMPDeclareReductionCombinerStart( |
| 3350 | /*S=*/nullptr, NewDRD); |
| 3351 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
| 3352 | cast<DeclRefExpr>(D->getCombinerIn())->getDecl(), |
| 3353 | cast<DeclRefExpr>(NewDRD->getCombinerIn())->getDecl()); |
| 3354 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
| 3355 | cast<DeclRefExpr>(D->getCombinerOut())->getDecl(), |
| 3356 | cast<DeclRefExpr>(NewDRD->getCombinerOut())->getDecl()); |
| 3357 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
| 3358 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, Qualifiers(), |
| 3359 | ThisContext); |
| 3360 | SubstCombiner = SemaRef.SubstExpr(Combiner, TemplateArgs).get(); |
| 3361 | SemaRef.ActOnOpenMPDeclareReductionCombinerEnd(NewDRD, SubstCombiner); |
| 3362 | } |
| 3363 | // Initializers instantiation sequence. |
| 3364 | if (Init) { |
| 3365 | VarDecl *OmpPrivParm = SemaRef.ActOnOpenMPDeclareReductionInitializerStart( |
| 3366 | /*S=*/nullptr, NewDRD); |
| 3367 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
| 3368 | cast<DeclRefExpr>(D->getInitOrig())->getDecl(), |
| 3369 | cast<DeclRefExpr>(NewDRD->getInitOrig())->getDecl()); |
| 3370 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
| 3371 | cast<DeclRefExpr>(D->getInitPriv())->getDecl(), |
| 3372 | cast<DeclRefExpr>(NewDRD->getInitPriv())->getDecl()); |
| 3373 | if (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit) { |
| 3374 | SubstInitializer = SemaRef.SubstExpr(Init, TemplateArgs).get(); |
| 3375 | } else { |
| 3376 | auto *OldPrivParm = |
| 3377 | cast<VarDecl>(cast<DeclRefExpr>(D->getInitPriv())->getDecl()); |
| 3378 | IsCorrect = IsCorrect && OldPrivParm->hasInit(); |
| 3379 | if (IsCorrect) |
| 3380 | SemaRef.InstantiateVariableInitializer(OmpPrivParm, OldPrivParm, |
| 3381 | TemplateArgs); |
| 3382 | } |
| 3383 | SemaRef.ActOnOpenMPDeclareReductionInitializerEnd(NewDRD, SubstInitializer, |
| 3384 | OmpPrivParm); |
| 3385 | } |
| 3386 | IsCorrect = IsCorrect && SubstCombiner && |
| 3387 | (!Init || |
| 3388 | (D->getInitializerKind() == OMPDeclareReductionDecl::CallInit && |
| 3389 | SubstInitializer) || |
| 3390 | (D->getInitializerKind() != OMPDeclareReductionDecl::CallInit && |
| 3391 | !SubstInitializer)); |
| 3392 | |
| 3393 | (void)SemaRef.ActOnOpenMPDeclareReductionDirectiveEnd( |
| 3394 | /*S=*/nullptr, DRD, IsCorrect && !D->isInvalidDecl()); |
| 3395 | |
| 3396 | return NewDRD; |
| 3397 | } |
| 3398 | |
| 3399 | Decl * |
| 3400 | TemplateDeclInstantiator::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) { |
| 3401 | // Instantiate type and check if it is allowed. |
| 3402 | const bool RequiresInstantiation = |
| 3403 | D->getType()->isDependentType() || |
| 3404 | D->getType()->isInstantiationDependentType() || |
| 3405 | D->getType()->containsUnexpandedParameterPack(); |
| 3406 | QualType SubstMapperTy; |
| 3407 | DeclarationName VN = D->getVarName(); |
| 3408 | if (RequiresInstantiation) { |
| 3409 | SubstMapperTy = SemaRef.ActOnOpenMPDeclareMapperType( |
| 3410 | D->getLocation(), |
| 3411 | ParsedType::make(SemaRef.SubstType(D->getType(), TemplateArgs, |
| 3412 | D->getLocation(), VN))); |
| 3413 | } else { |
| 3414 | SubstMapperTy = D->getType(); |
| 3415 | } |
| 3416 | if (SubstMapperTy.isNull()) |
| 3417 | return nullptr; |
| 3418 | // Create an instantiated copy of mapper. |
| 3419 | auto *PrevDeclInScope = D->getPrevDeclInScope(); |
| 3420 | if (PrevDeclInScope && !PrevDeclInScope->isInvalidDecl()) { |
| 3421 | PrevDeclInScope = cast<OMPDeclareMapperDecl>( |
| 3422 | SemaRef.CurrentInstantiationScope->findInstantiationOf(PrevDeclInScope) |
| 3423 | ->get<Decl *>()); |
| 3424 | } |
| 3425 | bool IsCorrect = true; |
| 3426 | SmallVector<OMPClause *, 6> Clauses; |
| 3427 | // Instantiate the mapper variable. |
| 3428 | DeclarationNameInfo DirName; |
| 3429 | SemaRef.StartOpenMPDSABlock(llvm::omp::OMPD_declare_mapper, DirName, |
| 3430 | /*S=*/nullptr, |
| 3431 | (*D->clauselist_begin())->getBeginLoc()); |
| 3432 | ExprResult MapperVarRef = SemaRef.ActOnOpenMPDeclareMapperDirectiveVarDecl( |
| 3433 | /*S=*/nullptr, SubstMapperTy, D->getLocation(), VN); |
| 3434 | SemaRef.CurrentInstantiationScope->InstantiatedLocal( |
| 3435 | cast<DeclRefExpr>(D->getMapperVarRef())->getDecl(), |
| 3436 | cast<DeclRefExpr>(MapperVarRef.get())->getDecl()); |
| 3437 | auto *ThisContext = dyn_cast_or_null<CXXRecordDecl>(Owner); |
| 3438 | Sema::CXXThisScopeRAII ThisScope(SemaRef, ThisContext, Qualifiers(), |
| 3439 | ThisContext); |
| 3440 | // Instantiate map clauses. |
| 3441 | for (OMPClause *C : D->clauselists()) { |
| 3442 | auto *OldC = cast<OMPMapClause>(C); |
| 3443 | SmallVector<Expr *, 4> NewVars; |
| 3444 | for (Expr *OE : OldC->varlists()) { |
| 3445 | Expr *NE = SemaRef.SubstExpr(OE, TemplateArgs).get(); |
| 3446 | if (!NE) { |
| 3447 | IsCorrect = false; |
| 3448 | break; |
| 3449 | } |
| 3450 | NewVars.push_back(NE); |
| 3451 | } |
| 3452 | if (!IsCorrect) |
| 3453 | break; |
| 3454 | NestedNameSpecifierLoc NewQualifierLoc = |
| 3455 | SemaRef.SubstNestedNameSpecifierLoc(OldC->getMapperQualifierLoc(), |
| 3456 | TemplateArgs); |
| 3457 | CXXScopeSpec SS; |
| 3458 | SS.Adopt(NewQualifierLoc); |
| 3459 | DeclarationNameInfo NewNameInfo = |
| 3460 | SemaRef.SubstDeclarationNameInfo(OldC->getMapperIdInfo(), TemplateArgs); |
| 3461 | OMPVarListLocTy Locs(OldC->getBeginLoc(), OldC->getLParenLoc(), |
| 3462 | OldC->getEndLoc()); |
| 3463 | OMPClause *NewC = SemaRef.ActOnOpenMPMapClause( |
| 3464 | OldC->getMapTypeModifiers(), OldC->getMapTypeModifiersLoc(), SS, |
| 3465 | NewNameInfo, OldC->getMapType(), OldC->isImplicitMapType(), |
| 3466 | OldC->getMapLoc(), OldC->getColonLoc(), NewVars, Locs); |
| 3467 | Clauses.push_back(NewC); |
| 3468 | } |
| 3469 | SemaRef.EndOpenMPDSABlock(nullptr); |
| 3470 | if (!IsCorrect) |
| 3471 | return nullptr; |
| 3472 | Sema::DeclGroupPtrTy DG = SemaRef.ActOnOpenMPDeclareMapperDirective( |
| 3473 | /*S=*/nullptr, Owner, D->getDeclName(), SubstMapperTy, D->getLocation(), |
| 3474 | VN, D->getAccess(), MapperVarRef.get(), Clauses, PrevDeclInScope); |
| 3475 | Decl *NewDMD = DG.get().getSingleDecl(); |
| 3476 | SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, NewDMD); |
| 3477 | return NewDMD; |
| 3478 | } |
| 3479 | |
| 3480 | Decl *TemplateDeclInstantiator::VisitOMPCapturedExprDecl( |
| 3481 | OMPCapturedExprDecl * /*D*/) { |
| 3482 | llvm_unreachable("Should not be met in templates")::llvm::llvm_unreachable_internal("Should not be met in templates" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3482); |
| 3483 | } |
| 3484 | |
| 3485 | Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D) { |
| 3486 | return VisitFunctionDecl(D, nullptr); |
| 3487 | } |
| 3488 | |
| 3489 | Decl * |
| 3490 | TemplateDeclInstantiator::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) { |
| 3491 | Decl *Inst = VisitFunctionDecl(D, nullptr); |
| 3492 | if (Inst && !D->getDescribedFunctionTemplate()) |
| 3493 | Owner->addDecl(Inst); |
| 3494 | return Inst; |
| 3495 | } |
| 3496 | |
| 3497 | Decl *TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D) { |
| 3498 | return VisitCXXMethodDecl(D, nullptr); |
| 3499 | } |
| 3500 | |
| 3501 | Decl *TemplateDeclInstantiator::VisitRecordDecl(RecordDecl *D) { |
| 3502 | llvm_unreachable("There are only CXXRecordDecls in C++")::llvm::llvm_unreachable_internal("There are only CXXRecordDecls in C++" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3502); |
| 3503 | } |
| 3504 | |
| 3505 | Decl * |
| 3506 | TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl( |
| 3507 | ClassTemplateSpecializationDecl *D) { |
| 3508 | // As a MS extension, we permit class-scope explicit specialization |
| 3509 | // of member class templates. |
| 3510 | ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate(); |
| 3511 | assert(ClassTemplate->getDeclContext()->isRecord() &&((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
| 3512 | D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization &&((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
| 3513 | "can only instantiate an explicit specialization "((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)) |
| 3514 | "for a member class template")((ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && "can only instantiate an explicit specialization " "for a member class template") ? static_cast<void> (0) : __assert_fail ("ClassTemplate->getDeclContext()->isRecord() && D->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && \"can only instantiate an explicit specialization \" \"for a member class template\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3514, __PRETTY_FUNCTION__)); |
| 3515 | |
| 3516 | // Lookup the already-instantiated declaration in the instantiation |
| 3517 | // of the class template. |
| 3518 | ClassTemplateDecl *InstClassTemplate = |
| 3519 | cast_or_null<ClassTemplateDecl>(SemaRef.FindInstantiatedDecl( |
| 3520 | D->getLocation(), ClassTemplate, TemplateArgs)); |
| 3521 | if (!InstClassTemplate) |
| 3522 | return nullptr; |
| 3523 | |
| 3524 | // Substitute into the template arguments of the class template explicit |
| 3525 | // specialization. |
| 3526 | TemplateSpecializationTypeLoc Loc = D->getTypeAsWritten()->getTypeLoc(). |
| 3527 | castAs<TemplateSpecializationTypeLoc>(); |
| 3528 | TemplateArgumentListInfo InstTemplateArgs(Loc.getLAngleLoc(), |
| 3529 | Loc.getRAngleLoc()); |
| 3530 | SmallVector<TemplateArgumentLoc, 4> ArgLocs; |
| 3531 | for (unsigned I = 0; I != Loc.getNumArgs(); ++I) |
| 3532 | ArgLocs.push_back(Loc.getArgLoc(I)); |
| 3533 | if (SemaRef.Subst(ArgLocs.data(), ArgLocs.size(), |
| 3534 | InstTemplateArgs, TemplateArgs)) |
| 3535 | return nullptr; |
| 3536 | |
| 3537 | // Check that the template argument list is well-formed for this |
| 3538 | // class template. |
| 3539 | SmallVector<TemplateArgument, 4> Converted; |
| 3540 | if (SemaRef.CheckTemplateArgumentList(InstClassTemplate, |
| 3541 | D->getLocation(), |
| 3542 | InstTemplateArgs, |
| 3543 | false, |
| 3544 | Converted, |
| 3545 | /*UpdateArgsWithConversion=*/true)) |
| 3546 | return nullptr; |
| 3547 | |
| 3548 | // Figure out where to insert this class template explicit specialization |
| 3549 | // in the member template's set of class template explicit specializations. |
| 3550 | void *InsertPos = nullptr; |
| 3551 | ClassTemplateSpecializationDecl *PrevDecl = |
| 3552 | InstClassTemplate->findSpecialization(Converted, InsertPos); |
| 3553 | |
| 3554 | // Check whether we've already seen a conflicting instantiation of this |
| 3555 | // declaration (for instance, if there was a prior implicit instantiation). |
| 3556 | bool Ignored; |
| 3557 | if (PrevDecl && |
| 3558 | SemaRef.CheckSpecializationInstantiationRedecl(D->getLocation(), |
| 3559 | D->getSpecializationKind(), |
| 3560 | PrevDecl, |
| 3561 | PrevDecl->getSpecializationKind(), |
| 3562 | PrevDecl->getPointOfInstantiation(), |
| 3563 | Ignored)) |
| 3564 | return nullptr; |
| 3565 | |
| 3566 | // If PrevDecl was a definition and D is also a definition, diagnose. |
| 3567 | // This happens in cases like: |
| 3568 | // |
| 3569 | // template<typename T, typename U> |
| 3570 | // struct Outer { |
| 3571 | // template<typename X> struct Inner; |
| 3572 | // template<> struct Inner<T> {}; |
| 3573 | // template<> struct Inner<U> {}; |
| 3574 | // }; |
| 3575 | // |
| 3576 | // Outer<int, int> outer; // error: the explicit specializations of Inner |
| 3577 | // // have the same signature. |
| 3578 | if (PrevDecl && PrevDecl->getDefinition() && |
| 3579 | D->isThisDeclarationADefinition()) { |
| 3580 | SemaRef.Diag(D->getLocation(), diag::err_redefinition) << PrevDecl; |
| 3581 | SemaRef.Diag(PrevDecl->getDefinition()->getLocation(), |
| 3582 | diag::note_previous_definition); |
| 3583 | return nullptr; |
| 3584 | } |
| 3585 | |
| 3586 | // Create the class template partial specialization declaration. |
| 3587 | ClassTemplateSpecializationDecl *InstD = |
| 3588 | ClassTemplateSpecializationDecl::Create( |
| 3589 | SemaRef.Context, D->getTagKind(), Owner, D->getBeginLoc(), |
| 3590 | D->getLocation(), InstClassTemplate, Converted, PrevDecl); |
| 3591 | |
| 3592 | // Add this partial specialization to the set of class template partial |
| 3593 | // specializations. |
| 3594 | if (!PrevDecl) |
| 3595 | InstClassTemplate->AddSpecialization(InstD, InsertPos); |
| 3596 | |
| 3597 | // Substitute the nested name specifier, if any. |
| 3598 | if (SubstQualifier(D, InstD)) |
| 3599 | return nullptr; |
| 3600 | |
| 3601 | // Build the canonical type that describes the converted template |
| 3602 | // arguments of the class template explicit specialization. |
| 3603 | QualType CanonType = SemaRef.Context.getTemplateSpecializationType( |
| 3604 | TemplateName(InstClassTemplate), Converted, |
| 3605 | SemaRef.Context.getRecordType(InstD)); |
| 3606 | |
| 3607 | // Build the fully-sugared type for this class template |
| 3608 | // specialization as the user wrote in the specialization |
| 3609 | // itself. This means that we'll pretty-print the type retrieved |
| 3610 | // from the specialization's declaration the way that the user |
| 3611 | // actually wrote the specialization, rather than formatting the |
| 3612 | // name based on the "canonical" representation used to store the |
| 3613 | // template arguments in the specialization. |
| 3614 | TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo( |
| 3615 | TemplateName(InstClassTemplate), D->getLocation(), InstTemplateArgs, |
| 3616 | CanonType); |
| 3617 | |
| 3618 | InstD->setAccess(D->getAccess()); |
| 3619 | InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation); |
| 3620 | InstD->setSpecializationKind(D->getSpecializationKind()); |
| 3621 | InstD->setTypeAsWritten(WrittenTy); |
| 3622 | InstD->setExternLoc(D->getExternLoc()); |
| 3623 | InstD->setTemplateKeywordLoc(D->getTemplateKeywordLoc()); |
| 3624 | |
| 3625 | Owner->addDecl(InstD); |
| 3626 | |
| 3627 | // Instantiate the members of the class-scope explicit specialization eagerly. |
| 3628 | // We don't have support for lazy instantiation of an explicit specialization |
| 3629 | // yet, and MSVC eagerly instantiates in this case. |
| 3630 | // FIXME: This is wrong in standard C++. |
| 3631 | if (D->isThisDeclarationADefinition() && |
| 3632 | SemaRef.InstantiateClass(D->getLocation(), InstD, D, TemplateArgs, |
| 3633 | TSK_ImplicitInstantiation, |
| 3634 | /*Complain=*/true)) |
| 3635 | return nullptr; |
| 3636 | |
| 3637 | return InstD; |
| 3638 | } |
| 3639 | |
| 3640 | Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl( |
| 3641 | VarTemplateSpecializationDecl *D) { |
| 3642 | |
| 3643 | TemplateArgumentListInfo VarTemplateArgsInfo; |
| 3644 | VarTemplateDecl *VarTemplate = D->getSpecializedTemplate(); |
| 3645 | assert(VarTemplate &&((VarTemplate && "A template specialization without specialized template?" ) ? static_cast<void> (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3646, __PRETTY_FUNCTION__)) |
| 3646 | "A template specialization without specialized template?")((VarTemplate && "A template specialization without specialized template?" ) ? static_cast<void> (0) : __assert_fail ("VarTemplate && \"A template specialization without specialized template?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3646, __PRETTY_FUNCTION__)); |
| 3647 | |
| 3648 | VarTemplateDecl *InstVarTemplate = |
| 3649 | cast_or_null<VarTemplateDecl>(SemaRef.FindInstantiatedDecl( |
| 3650 | D->getLocation(), VarTemplate, TemplateArgs)); |
| 3651 | if (!InstVarTemplate) |
| 3652 | return nullptr; |
| 3653 | |
| 3654 | // Substitute the current template arguments. |
| 3655 | const TemplateArgumentListInfo &TemplateArgsInfo = D->getTemplateArgsInfo(); |
| 3656 | VarTemplateArgsInfo.setLAngleLoc(TemplateArgsInfo.getLAngleLoc()); |
| 3657 | VarTemplateArgsInfo.setRAngleLoc(TemplateArgsInfo.getRAngleLoc()); |
| 3658 | |
| 3659 | if (SemaRef.Subst(TemplateArgsInfo.getArgumentArray(), |
| 3660 | TemplateArgsInfo.size(), VarTemplateArgsInfo, TemplateArgs)) |
| 3661 | return nullptr; |
| 3662 | |
| 3663 | // Check that the template argument list is well-formed for this template. |
| 3664 | SmallVector<TemplateArgument, 4> Converted; |
| 3665 | if (SemaRef.CheckTemplateArgumentList(InstVarTemplate, D->getLocation(), |
| 3666 | VarTemplateArgsInfo, false, Converted, |
| 3667 | /*UpdateArgsWithConversion=*/true)) |
| 3668 | return nullptr; |
| 3669 | |
| 3670 | // Check whether we've already seen a declaration of this specialization. |
| 3671 | void *InsertPos = nullptr; |
| 3672 | VarTemplateSpecializationDecl *PrevDecl = |
| 3673 | InstVarTemplate->findSpecialization(Converted, InsertPos); |
| 3674 | |
| 3675 | // Check whether we've already seen a conflicting instantiation of this |
| 3676 | // declaration (for instance, if there was a prior implicit instantiation). |
| 3677 | bool Ignored; |
| 3678 | if (PrevDecl && SemaRef.CheckSpecializationInstantiationRedecl( |
| 3679 | D->getLocation(), D->getSpecializationKind(), PrevDecl, |
| 3680 | PrevDecl->getSpecializationKind(), |
| 3681 | PrevDecl->getPointOfInstantiation(), Ignored)) |
| 3682 | return nullptr; |
| 3683 | |
| 3684 | return VisitVarTemplateSpecializationDecl( |
| 3685 | InstVarTemplate, D, VarTemplateArgsInfo, Converted, PrevDecl); |
| 3686 | } |
| 3687 | |
| 3688 | Decl *TemplateDeclInstantiator::VisitVarTemplateSpecializationDecl( |
| 3689 | VarTemplateDecl *VarTemplate, VarDecl *D, |
| 3690 | const TemplateArgumentListInfo &TemplateArgsInfo, |
| 3691 | ArrayRef<TemplateArgument> Converted, |
| 3692 | VarTemplateSpecializationDecl *PrevDecl) { |
| 3693 | |
| 3694 | // Do substitution on the type of the declaration |
| 3695 | TypeSourceInfo *DI = |
| 3696 | SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs, |
| 3697 | D->getTypeSpecStartLoc(), D->getDeclName()); |
| 3698 | if (!DI) |
| 3699 | return nullptr; |
| 3700 | |
| 3701 | if (DI->getType()->isFunctionType()) { |
| 3702 | SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function) |
| 3703 | << D->isStaticDataMember() << DI->getType(); |
| 3704 | return nullptr; |
| 3705 | } |
| 3706 | |
| 3707 | // Build the instantiated declaration |
| 3708 | VarTemplateSpecializationDecl *Var = VarTemplateSpecializationDecl::Create( |
| 3709 | SemaRef.Context, Owner, D->getInnerLocStart(), D->getLocation(), |
| 3710 | VarTemplate, DI->getType(), DI, D->getStorageClass(), Converted); |
| 3711 | Var->setTemplateArgsInfo(TemplateArgsInfo); |
| 3712 | if (!PrevDecl) { |
| 3713 | void *InsertPos = nullptr; |
| 3714 | VarTemplate->findSpecialization(Converted, InsertPos); |
| 3715 | VarTemplate->AddSpecialization(Var, InsertPos); |
| 3716 | } |
| 3717 | |
| 3718 | if (SemaRef.getLangOpts().OpenCL) |
| 3719 | SemaRef.deduceOpenCLAddressSpace(Var); |
| 3720 | |
| 3721 | // Substitute the nested name specifier, if any. |
| 3722 | if (SubstQualifier(D, Var)) |
| 3723 | return nullptr; |
| 3724 | |
| 3725 | SemaRef.BuildVariableInstantiation(Var, D, TemplateArgs, LateAttrs, Owner, |
| 3726 | StartingScope, false, PrevDecl); |
| 3727 | |
| 3728 | return Var; |
| 3729 | } |
| 3730 | |
| 3731 | Decl *TemplateDeclInstantiator::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) { |
| 3732 | llvm_unreachable("@defs is not supported in Objective-C++")::llvm::llvm_unreachable_internal("@defs is not supported in Objective-C++" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3732); |
| 3733 | } |
| 3734 | |
| 3735 | Decl *TemplateDeclInstantiator::VisitFriendTemplateDecl(FriendTemplateDecl *D) { |
| 3736 | // FIXME: We need to be able to instantiate FriendTemplateDecls. |
| 3737 | unsigned DiagID = SemaRef.getDiagnostics().getCustomDiagID( |
| 3738 | DiagnosticsEngine::Error, |
| 3739 | "cannot instantiate %0 yet"); |
| 3740 | SemaRef.Diag(D->getLocation(), DiagID) |
| 3741 | << D->getDeclKindName(); |
| 3742 | |
| 3743 | return nullptr; |
| 3744 | } |
| 3745 | |
| 3746 | Decl *TemplateDeclInstantiator::VisitConceptDecl(ConceptDecl *D) { |
| 3747 | llvm_unreachable("Concept definitions cannot reside inside a template")::llvm::llvm_unreachable_internal("Concept definitions cannot reside inside a template" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3747); |
| 3748 | } |
| 3749 | |
| 3750 | Decl * |
| 3751 | TemplateDeclInstantiator::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) { |
| 3752 | return RequiresExprBodyDecl::Create(SemaRef.Context, D->getDeclContext(), |
| 3753 | D->getBeginLoc()); |
| 3754 | } |
| 3755 | |
| 3756 | Decl *TemplateDeclInstantiator::VisitDecl(Decl *D) { |
| 3757 | llvm_unreachable("Unexpected decl")::llvm::llvm_unreachable_internal("Unexpected decl", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3757); |
| 3758 | } |
| 3759 | |
| 3760 | Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner, |
| 3761 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 3762 | TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs); |
| 3763 | if (D->isInvalidDecl()) |
| 3764 | return nullptr; |
| 3765 | |
| 3766 | Decl *SubstD; |
| 3767 | runWithSufficientStackSpace(D->getLocation(), [&] { |
| 3768 | SubstD = Instantiator.Visit(D); |
| 3769 | }); |
| 3770 | return SubstD; |
| 3771 | } |
| 3772 | |
| 3773 | void TemplateDeclInstantiator::adjustForRewrite(RewriteKind RK, |
| 3774 | FunctionDecl *Orig, QualType &T, |
| 3775 | TypeSourceInfo *&TInfo, |
| 3776 | DeclarationNameInfo &NameInfo) { |
| 3777 | assert(RK == RewriteKind::RewriteSpaceshipAsEqualEqual)((RK == RewriteKind::RewriteSpaceshipAsEqualEqual) ? static_cast <void> (0) : __assert_fail ("RK == RewriteKind::RewriteSpaceshipAsEqualEqual" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3777, __PRETTY_FUNCTION__)); |
| 3778 | |
| 3779 | // C++2a [class.compare.default]p3: |
| 3780 | // the return type is replaced with bool |
| 3781 | auto *FPT = T->castAs<FunctionProtoType>(); |
| 3782 | T = SemaRef.Context.getFunctionType( |
| 3783 | SemaRef.Context.BoolTy, FPT->getParamTypes(), FPT->getExtProtoInfo()); |
| 3784 | |
| 3785 | // Update the return type in the source info too. The most straightforward |
| 3786 | // way is to create new TypeSourceInfo for the new type. Use the location of |
| 3787 | // the '= default' as the location of the new type. |
| 3788 | // |
| 3789 | // FIXME: Set the correct return type when we initially transform the type, |
| 3790 | // rather than delaying it to now. |
| 3791 | TypeSourceInfo *NewTInfo = |
| 3792 | SemaRef.Context.getTrivialTypeSourceInfo(T, Orig->getEndLoc()); |
| 3793 | auto OldLoc = TInfo->getTypeLoc().getAsAdjusted<FunctionProtoTypeLoc>(); |
| 3794 | assert(OldLoc && "type of function is not a function type?")((OldLoc && "type of function is not a function type?" ) ? static_cast<void> (0) : __assert_fail ("OldLoc && \"type of function is not a function type?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3794, __PRETTY_FUNCTION__)); |
| 3795 | auto NewLoc = NewTInfo->getTypeLoc().castAs<FunctionProtoTypeLoc>(); |
| 3796 | for (unsigned I = 0, N = OldLoc.getNumParams(); I != N; ++I) |
| 3797 | NewLoc.setParam(I, OldLoc.getParam(I)); |
| 3798 | TInfo = NewTInfo; |
| 3799 | |
| 3800 | // and the declarator-id is replaced with operator== |
| 3801 | NameInfo.setName( |
| 3802 | SemaRef.Context.DeclarationNames.getCXXOperatorName(OO_EqualEqual)); |
| 3803 | } |
| 3804 | |
| 3805 | FunctionDecl *Sema::SubstSpaceshipAsEqualEqual(CXXRecordDecl *RD, |
| 3806 | FunctionDecl *Spaceship) { |
| 3807 | if (Spaceship->isInvalidDecl()) |
| 3808 | return nullptr; |
| 3809 | |
| 3810 | // C++2a [class.compare.default]p3: |
| 3811 | // an == operator function is declared implicitly [...] with the same |
| 3812 | // access and function-definition and in the same class scope as the |
| 3813 | // three-way comparison operator function |
| 3814 | MultiLevelTemplateArgumentList NoTemplateArgs; |
| 3815 | NoTemplateArgs.setKind(TemplateSubstitutionKind::Rewrite); |
| 3816 | NoTemplateArgs.addOuterRetainedLevels(RD->getTemplateDepth()); |
| 3817 | TemplateDeclInstantiator Instantiator(*this, RD, NoTemplateArgs); |
| 3818 | Decl *R; |
| 3819 | if (auto *MD = dyn_cast<CXXMethodDecl>(Spaceship)) { |
| 3820 | R = Instantiator.VisitCXXMethodDecl( |
| 3821 | MD, nullptr, None, |
| 3822 | TemplateDeclInstantiator::RewriteKind::RewriteSpaceshipAsEqualEqual); |
| 3823 | } else { |
| 3824 | assert(Spaceship->getFriendObjectKind() &&((Spaceship->getFriendObjectKind() && "defaulted spaceship is neither a member nor a friend" ) ? static_cast<void> (0) : __assert_fail ("Spaceship->getFriendObjectKind() && \"defaulted spaceship is neither a member nor a friend\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3825, __PRETTY_FUNCTION__)) |
| 3825 | "defaulted spaceship is neither a member nor a friend")((Spaceship->getFriendObjectKind() && "defaulted spaceship is neither a member nor a friend" ) ? static_cast<void> (0) : __assert_fail ("Spaceship->getFriendObjectKind() && \"defaulted spaceship is neither a member nor a friend\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 3825, __PRETTY_FUNCTION__)); |
| 3826 | |
| 3827 | R = Instantiator.VisitFunctionDecl( |
| 3828 | Spaceship, nullptr, |
| 3829 | TemplateDeclInstantiator::RewriteKind::RewriteSpaceshipAsEqualEqual); |
| 3830 | if (!R) |
| 3831 | return nullptr; |
| 3832 | |
| 3833 | FriendDecl *FD = |
| 3834 | FriendDecl::Create(Context, RD, Spaceship->getLocation(), |
| 3835 | cast<NamedDecl>(R), Spaceship->getBeginLoc()); |
| 3836 | FD->setAccess(AS_public); |
| 3837 | RD->addDecl(FD); |
| 3838 | } |
| 3839 | return cast_or_null<FunctionDecl>(R); |
| 3840 | } |
| 3841 | |
| 3842 | /// Instantiates a nested template parameter list in the current |
| 3843 | /// instantiation context. |
| 3844 | /// |
| 3845 | /// \param L The parameter list to instantiate |
| 3846 | /// |
| 3847 | /// \returns NULL if there was an error |
| 3848 | TemplateParameterList * |
| 3849 | TemplateDeclInstantiator::SubstTemplateParams(TemplateParameterList *L) { |
| 3850 | // Get errors for all the parameters before bailing out. |
| 3851 | bool Invalid = false; |
| 3852 | |
| 3853 | unsigned N = L->size(); |
| 3854 | typedef SmallVector<NamedDecl *, 8> ParamVector; |
| 3855 | ParamVector Params; |
| 3856 | Params.reserve(N); |
| 3857 | for (auto &P : *L) { |
| 3858 | NamedDecl *D = cast_or_null<NamedDecl>(Visit(P)); |
| 3859 | Params.push_back(D); |
| 3860 | Invalid = Invalid || !D || D->isInvalidDecl(); |
| 3861 | } |
| 3862 | |
| 3863 | // Clean up if we had an error. |
| 3864 | if (Invalid) |
| 3865 | return nullptr; |
| 3866 | |
| 3867 | // FIXME: Concepts: Substitution into requires clause should only happen when |
| 3868 | // checking satisfaction. |
| 3869 | Expr *InstRequiresClause = nullptr; |
| 3870 | if (Expr *E = L->getRequiresClause()) { |
| 3871 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 3872 | SemaRef, Sema::ExpressionEvaluationContext::Unevaluated); |
| 3873 | ExprResult Res = SemaRef.SubstExpr(E, TemplateArgs); |
| 3874 | if (Res.isInvalid() || !Res.isUsable()) { |
| 3875 | return nullptr; |
| 3876 | } |
| 3877 | InstRequiresClause = Res.get(); |
| 3878 | } |
| 3879 | |
| 3880 | TemplateParameterList *InstL |
| 3881 | = TemplateParameterList::Create(SemaRef.Context, L->getTemplateLoc(), |
| 3882 | L->getLAngleLoc(), Params, |
| 3883 | L->getRAngleLoc(), InstRequiresClause); |
| 3884 | return InstL; |
| 3885 | } |
| 3886 | |
| 3887 | TemplateParameterList * |
| 3888 | Sema::SubstTemplateParams(TemplateParameterList *Params, DeclContext *Owner, |
| 3889 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 3890 | TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs); |
| 3891 | return Instantiator.SubstTemplateParams(Params); |
| 3892 | } |
| 3893 | |
| 3894 | /// Instantiate the declaration of a class template partial |
| 3895 | /// specialization. |
| 3896 | /// |
| 3897 | /// \param ClassTemplate the (instantiated) class template that is partially |
| 3898 | // specialized by the instantiation of \p PartialSpec. |
| 3899 | /// |
| 3900 | /// \param PartialSpec the (uninstantiated) class template partial |
| 3901 | /// specialization that we are instantiating. |
| 3902 | /// |
| 3903 | /// \returns The instantiated partial specialization, if successful; otherwise, |
| 3904 | /// NULL to indicate an error. |
| 3905 | ClassTemplatePartialSpecializationDecl * |
| 3906 | TemplateDeclInstantiator::InstantiateClassTemplatePartialSpecialization( |
| 3907 | ClassTemplateDecl *ClassTemplate, |
| 3908 | ClassTemplatePartialSpecializationDecl *PartialSpec) { |
| 3909 | // Create a local instantiation scope for this class template partial |
| 3910 | // specialization, which will contain the instantiations of the template |
| 3911 | // parameters. |
| 3912 | LocalInstantiationScope Scope(SemaRef); |
| 3913 | |
| 3914 | // Substitute into the template parameters of the class template partial |
| 3915 | // specialization. |
| 3916 | TemplateParameterList *TempParams = PartialSpec->getTemplateParameters(); |
| 3917 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 3918 | if (!InstParams) |
| 3919 | return nullptr; |
| 3920 | |
| 3921 | // Substitute into the template arguments of the class template partial |
| 3922 | // specialization. |
| 3923 | const ASTTemplateArgumentListInfo *TemplArgInfo |
| 3924 | = PartialSpec->getTemplateArgsAsWritten(); |
| 3925 | TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc, |
| 3926 | TemplArgInfo->RAngleLoc); |
| 3927 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
| 3928 | TemplArgInfo->NumTemplateArgs, |
| 3929 | InstTemplateArgs, TemplateArgs)) |
| 3930 | return nullptr; |
| 3931 | |
| 3932 | // Check that the template argument list is well-formed for this |
| 3933 | // class template. |
| 3934 | SmallVector<TemplateArgument, 4> Converted; |
| 3935 | if (SemaRef.CheckTemplateArgumentList(ClassTemplate, |
| 3936 | PartialSpec->getLocation(), |
| 3937 | InstTemplateArgs, |
| 3938 | false, |
| 3939 | Converted)) |
| 3940 | return nullptr; |
| 3941 | |
| 3942 | // Check these arguments are valid for a template partial specialization. |
| 3943 | if (SemaRef.CheckTemplatePartialSpecializationArgs( |
| 3944 | PartialSpec->getLocation(), ClassTemplate, InstTemplateArgs.size(), |
| 3945 | Converted)) |
| 3946 | return nullptr; |
| 3947 | |
| 3948 | // Figure out where to insert this class template partial specialization |
| 3949 | // in the member template's set of class template partial specializations. |
| 3950 | void *InsertPos = nullptr; |
| 3951 | ClassTemplateSpecializationDecl *PrevDecl |
| 3952 | = ClassTemplate->findPartialSpecialization(Converted, InstParams, |
| 3953 | InsertPos); |
| 3954 | |
| 3955 | // Build the canonical type that describes the converted template |
| 3956 | // arguments of the class template partial specialization. |
| 3957 | QualType CanonType |
| 3958 | = SemaRef.Context.getTemplateSpecializationType(TemplateName(ClassTemplate), |
| 3959 | Converted); |
| 3960 | |
| 3961 | // Build the fully-sugared type for this class template |
| 3962 | // specialization as the user wrote in the specialization |
| 3963 | // itself. This means that we'll pretty-print the type retrieved |
| 3964 | // from the specialization's declaration the way that the user |
| 3965 | // actually wrote the specialization, rather than formatting the |
| 3966 | // name based on the "canonical" representation used to store the |
| 3967 | // template arguments in the specialization. |
| 3968 | TypeSourceInfo *WrittenTy |
| 3969 | = SemaRef.Context.getTemplateSpecializationTypeInfo( |
| 3970 | TemplateName(ClassTemplate), |
| 3971 | PartialSpec->getLocation(), |
| 3972 | InstTemplateArgs, |
| 3973 | CanonType); |
| 3974 | |
| 3975 | if (PrevDecl) { |
| 3976 | // We've already seen a partial specialization with the same template |
| 3977 | // parameters and template arguments. This can happen, for example, when |
| 3978 | // substituting the outer template arguments ends up causing two |
| 3979 | // class template partial specializations of a member class template |
| 3980 | // to have identical forms, e.g., |
| 3981 | // |
| 3982 | // template<typename T, typename U> |
| 3983 | // struct Outer { |
| 3984 | // template<typename X, typename Y> struct Inner; |
| 3985 | // template<typename Y> struct Inner<T, Y>; |
| 3986 | // template<typename Y> struct Inner<U, Y>; |
| 3987 | // }; |
| 3988 | // |
| 3989 | // Outer<int, int> outer; // error: the partial specializations of Inner |
| 3990 | // // have the same signature. |
| 3991 | SemaRef.Diag(PartialSpec->getLocation(), diag::err_partial_spec_redeclared) |
| 3992 | << WrittenTy->getType(); |
| 3993 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_prev_partial_spec_here) |
| 3994 | << SemaRef.Context.getTypeDeclType(PrevDecl); |
| 3995 | return nullptr; |
| 3996 | } |
| 3997 | |
| 3998 | |
| 3999 | // Create the class template partial specialization declaration. |
| 4000 | ClassTemplatePartialSpecializationDecl *InstPartialSpec = |
| 4001 | ClassTemplatePartialSpecializationDecl::Create( |
| 4002 | SemaRef.Context, PartialSpec->getTagKind(), Owner, |
| 4003 | PartialSpec->getBeginLoc(), PartialSpec->getLocation(), InstParams, |
| 4004 | ClassTemplate, Converted, InstTemplateArgs, CanonType, nullptr); |
| 4005 | // Substitute the nested name specifier, if any. |
| 4006 | if (SubstQualifier(PartialSpec, InstPartialSpec)) |
| 4007 | return nullptr; |
| 4008 | |
| 4009 | InstPartialSpec->setInstantiatedFromMember(PartialSpec); |
| 4010 | InstPartialSpec->setTypeAsWritten(WrittenTy); |
| 4011 | |
| 4012 | // Check the completed partial specialization. |
| 4013 | SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec); |
| 4014 | |
| 4015 | // Add this partial specialization to the set of class template partial |
| 4016 | // specializations. |
| 4017 | ClassTemplate->AddPartialSpecialization(InstPartialSpec, |
| 4018 | /*InsertPos=*/nullptr); |
| 4019 | return InstPartialSpec; |
| 4020 | } |
| 4021 | |
| 4022 | /// Instantiate the declaration of a variable template partial |
| 4023 | /// specialization. |
| 4024 | /// |
| 4025 | /// \param VarTemplate the (instantiated) variable template that is partially |
| 4026 | /// specialized by the instantiation of \p PartialSpec. |
| 4027 | /// |
| 4028 | /// \param PartialSpec the (uninstantiated) variable template partial |
| 4029 | /// specialization that we are instantiating. |
| 4030 | /// |
| 4031 | /// \returns The instantiated partial specialization, if successful; otherwise, |
| 4032 | /// NULL to indicate an error. |
| 4033 | VarTemplatePartialSpecializationDecl * |
| 4034 | TemplateDeclInstantiator::InstantiateVarTemplatePartialSpecialization( |
| 4035 | VarTemplateDecl *VarTemplate, |
| 4036 | VarTemplatePartialSpecializationDecl *PartialSpec) { |
| 4037 | // Create a local instantiation scope for this variable template partial |
| 4038 | // specialization, which will contain the instantiations of the template |
| 4039 | // parameters. |
| 4040 | LocalInstantiationScope Scope(SemaRef); |
| 4041 | |
| 4042 | // Substitute into the template parameters of the variable template partial |
| 4043 | // specialization. |
| 4044 | TemplateParameterList *TempParams = PartialSpec->getTemplateParameters(); |
| 4045 | TemplateParameterList *InstParams = SubstTemplateParams(TempParams); |
| 4046 | if (!InstParams) |
| 4047 | return nullptr; |
| 4048 | |
| 4049 | // Substitute into the template arguments of the variable template partial |
| 4050 | // specialization. |
| 4051 | const ASTTemplateArgumentListInfo *TemplArgInfo |
| 4052 | = PartialSpec->getTemplateArgsAsWritten(); |
| 4053 | TemplateArgumentListInfo InstTemplateArgs(TemplArgInfo->LAngleLoc, |
| 4054 | TemplArgInfo->RAngleLoc); |
| 4055 | if (SemaRef.Subst(TemplArgInfo->getTemplateArgs(), |
| 4056 | TemplArgInfo->NumTemplateArgs, |
| 4057 | InstTemplateArgs, TemplateArgs)) |
| 4058 | return nullptr; |
| 4059 | |
| 4060 | // Check that the template argument list is well-formed for this |
| 4061 | // class template. |
| 4062 | SmallVector<TemplateArgument, 4> Converted; |
| 4063 | if (SemaRef.CheckTemplateArgumentList(VarTemplate, PartialSpec->getLocation(), |
| 4064 | InstTemplateArgs, false, Converted)) |
| 4065 | return nullptr; |
| 4066 | |
| 4067 | // Check these arguments are valid for a template partial specialization. |
| 4068 | if (SemaRef.CheckTemplatePartialSpecializationArgs( |
| 4069 | PartialSpec->getLocation(), VarTemplate, InstTemplateArgs.size(), |
| 4070 | Converted)) |
| 4071 | return nullptr; |
| 4072 | |
| 4073 | // Figure out where to insert this variable template partial specialization |
| 4074 | // in the member template's set of variable template partial specializations. |
| 4075 | void *InsertPos = nullptr; |
| 4076 | VarTemplateSpecializationDecl *PrevDecl = |
| 4077 | VarTemplate->findPartialSpecialization(Converted, InstParams, InsertPos); |
| 4078 | |
| 4079 | // Build the canonical type that describes the converted template |
| 4080 | // arguments of the variable template partial specialization. |
| 4081 | QualType CanonType = SemaRef.Context.getTemplateSpecializationType( |
| 4082 | TemplateName(VarTemplate), Converted); |
| 4083 | |
| 4084 | // Build the fully-sugared type for this variable template |
| 4085 | // specialization as the user wrote in the specialization |
| 4086 | // itself. This means that we'll pretty-print the type retrieved |
| 4087 | // from the specialization's declaration the way that the user |
| 4088 | // actually wrote the specialization, rather than formatting the |
| 4089 | // name based on the "canonical" representation used to store the |
| 4090 | // template arguments in the specialization. |
| 4091 | TypeSourceInfo *WrittenTy = SemaRef.Context.getTemplateSpecializationTypeInfo( |
| 4092 | TemplateName(VarTemplate), PartialSpec->getLocation(), InstTemplateArgs, |
| 4093 | CanonType); |
| 4094 | |
| 4095 | if (PrevDecl) { |
| 4096 | // We've already seen a partial specialization with the same template |
| 4097 | // parameters and template arguments. This can happen, for example, when |
| 4098 | // substituting the outer template arguments ends up causing two |
| 4099 | // variable template partial specializations of a member variable template |
| 4100 | // to have identical forms, e.g., |
| 4101 | // |
| 4102 | // template<typename T, typename U> |
| 4103 | // struct Outer { |
| 4104 | // template<typename X, typename Y> pair<X,Y> p; |
| 4105 | // template<typename Y> pair<T, Y> p; |
| 4106 | // template<typename Y> pair<U, Y> p; |
| 4107 | // }; |
| 4108 | // |
| 4109 | // Outer<int, int> outer; // error: the partial specializations of Inner |
| 4110 | // // have the same signature. |
| 4111 | SemaRef.Diag(PartialSpec->getLocation(), |
| 4112 | diag::err_var_partial_spec_redeclared) |
| 4113 | << WrittenTy->getType(); |
| 4114 | SemaRef.Diag(PrevDecl->getLocation(), |
| 4115 | diag::note_var_prev_partial_spec_here); |
| 4116 | return nullptr; |
| 4117 | } |
| 4118 | |
| 4119 | // Do substitution on the type of the declaration |
| 4120 | TypeSourceInfo *DI = SemaRef.SubstType( |
| 4121 | PartialSpec->getTypeSourceInfo(), TemplateArgs, |
| 4122 | PartialSpec->getTypeSpecStartLoc(), PartialSpec->getDeclName()); |
| 4123 | if (!DI) |
| 4124 | return nullptr; |
| 4125 | |
| 4126 | if (DI->getType()->isFunctionType()) { |
| 4127 | SemaRef.Diag(PartialSpec->getLocation(), |
| 4128 | diag::err_variable_instantiates_to_function) |
| 4129 | << PartialSpec->isStaticDataMember() << DI->getType(); |
| 4130 | return nullptr; |
| 4131 | } |
| 4132 | |
| 4133 | // Create the variable template partial specialization declaration. |
| 4134 | VarTemplatePartialSpecializationDecl *InstPartialSpec = |
| 4135 | VarTemplatePartialSpecializationDecl::Create( |
| 4136 | SemaRef.Context, Owner, PartialSpec->getInnerLocStart(), |
| 4137 | PartialSpec->getLocation(), InstParams, VarTemplate, DI->getType(), |
| 4138 | DI, PartialSpec->getStorageClass(), Converted, InstTemplateArgs); |
| 4139 | |
| 4140 | // Substitute the nested name specifier, if any. |
| 4141 | if (SubstQualifier(PartialSpec, InstPartialSpec)) |
| 4142 | return nullptr; |
| 4143 | |
| 4144 | InstPartialSpec->setInstantiatedFromMember(PartialSpec); |
| 4145 | InstPartialSpec->setTypeAsWritten(WrittenTy); |
| 4146 | |
| 4147 | // Check the completed partial specialization. |
| 4148 | SemaRef.CheckTemplatePartialSpecialization(InstPartialSpec); |
| 4149 | |
| 4150 | // Add this partial specialization to the set of variable template partial |
| 4151 | // specializations. The instantiation of the initializer is not necessary. |
| 4152 | VarTemplate->AddPartialSpecialization(InstPartialSpec, /*InsertPos=*/nullptr); |
| 4153 | |
| 4154 | SemaRef.BuildVariableInstantiation(InstPartialSpec, PartialSpec, TemplateArgs, |
| 4155 | LateAttrs, Owner, StartingScope); |
| 4156 | |
| 4157 | return InstPartialSpec; |
| 4158 | } |
| 4159 | |
| 4160 | TypeSourceInfo* |
| 4161 | TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D, |
| 4162 | SmallVectorImpl<ParmVarDecl *> &Params) { |
| 4163 | TypeSourceInfo *OldTInfo = D->getTypeSourceInfo(); |
| 4164 | assert(OldTInfo && "substituting function without type source info")((OldTInfo && "substituting function without type source info" ) ? static_cast<void> (0) : __assert_fail ("OldTInfo && \"substituting function without type source info\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4164, __PRETTY_FUNCTION__)); |
| 4165 | assert(Params.empty() && "parameter vector is non-empty at start")((Params.empty() && "parameter vector is non-empty at start" ) ? static_cast<void> (0) : __assert_fail ("Params.empty() && \"parameter vector is non-empty at start\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4165, __PRETTY_FUNCTION__)); |
| 4166 | |
| 4167 | CXXRecordDecl *ThisContext = nullptr; |
| 4168 | Qualifiers ThisTypeQuals; |
| 4169 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { |
| 4170 | ThisContext = cast<CXXRecordDecl>(Owner); |
| 4171 | ThisTypeQuals = Method->getMethodQualifiers(); |
| 4172 | } |
| 4173 | |
| 4174 | TypeSourceInfo *NewTInfo |
| 4175 | = SemaRef.SubstFunctionDeclType(OldTInfo, TemplateArgs, |
| 4176 | D->getTypeSpecStartLoc(), |
| 4177 | D->getDeclName(), |
| 4178 | ThisContext, ThisTypeQuals); |
| 4179 | if (!NewTInfo) |
| 4180 | return nullptr; |
| 4181 | |
| 4182 | TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens(); |
| 4183 | if (FunctionProtoTypeLoc OldProtoLoc = OldTL.getAs<FunctionProtoTypeLoc>()) { |
| 4184 | if (NewTInfo != OldTInfo) { |
| 4185 | // Get parameters from the new type info. |
| 4186 | TypeLoc NewTL = NewTInfo->getTypeLoc().IgnoreParens(); |
| 4187 | FunctionProtoTypeLoc NewProtoLoc = NewTL.castAs<FunctionProtoTypeLoc>(); |
| 4188 | unsigned NewIdx = 0; |
| 4189 | for (unsigned OldIdx = 0, NumOldParams = OldProtoLoc.getNumParams(); |
| 4190 | OldIdx != NumOldParams; ++OldIdx) { |
| 4191 | ParmVarDecl *OldParam = OldProtoLoc.getParam(OldIdx); |
| 4192 | LocalInstantiationScope *Scope = SemaRef.CurrentInstantiationScope; |
| 4193 | |
| 4194 | Optional<unsigned> NumArgumentsInExpansion; |
| 4195 | if (OldParam->isParameterPack()) |
| 4196 | NumArgumentsInExpansion = |
| 4197 | SemaRef.getNumArgumentsInExpansion(OldParam->getType(), |
| 4198 | TemplateArgs); |
| 4199 | if (!NumArgumentsInExpansion) { |
| 4200 | // Simple case: normal parameter, or a parameter pack that's |
| 4201 | // instantiated to a (still-dependent) parameter pack. |
| 4202 | ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++); |
| 4203 | Params.push_back(NewParam); |
| 4204 | Scope->InstantiatedLocal(OldParam, NewParam); |
| 4205 | } else { |
| 4206 | // Parameter pack expansion: make the instantiation an argument pack. |
| 4207 | Scope->MakeInstantiatedLocalArgPack(OldParam); |
| 4208 | for (unsigned I = 0; I != *NumArgumentsInExpansion; ++I) { |
| 4209 | ParmVarDecl *NewParam = NewProtoLoc.getParam(NewIdx++); |
| 4210 | Params.push_back(NewParam); |
| 4211 | Scope->InstantiatedLocalPackArg(OldParam, NewParam); |
| 4212 | } |
| 4213 | } |
| 4214 | } |
| 4215 | } else { |
| 4216 | // The function type itself was not dependent and therefore no |
| 4217 | // substitution occurred. However, we still need to instantiate |
| 4218 | // the function parameters themselves. |
| 4219 | const FunctionProtoType *OldProto = |
| 4220 | cast<FunctionProtoType>(OldProtoLoc.getType()); |
| 4221 | for (unsigned i = 0, i_end = OldProtoLoc.getNumParams(); i != i_end; |
| 4222 | ++i) { |
| 4223 | ParmVarDecl *OldParam = OldProtoLoc.getParam(i); |
| 4224 | if (!OldParam) { |
| 4225 | Params.push_back(SemaRef.BuildParmVarDeclForTypedef( |
| 4226 | D, D->getLocation(), OldProto->getParamType(i))); |
| 4227 | continue; |
| 4228 | } |
| 4229 | |
| 4230 | ParmVarDecl *Parm = |
| 4231 | cast_or_null<ParmVarDecl>(VisitParmVarDecl(OldParam)); |
| 4232 | if (!Parm) |
| 4233 | return nullptr; |
| 4234 | Params.push_back(Parm); |
| 4235 | } |
| 4236 | } |
| 4237 | } else { |
| 4238 | // If the type of this function, after ignoring parentheses, is not |
| 4239 | // *directly* a function type, then we're instantiating a function that |
| 4240 | // was declared via a typedef or with attributes, e.g., |
| 4241 | // |
| 4242 | // typedef int functype(int, int); |
| 4243 | // functype func; |
| 4244 | // int __cdecl meth(int, int); |
| 4245 | // |
| 4246 | // In this case, we'll just go instantiate the ParmVarDecls that we |
| 4247 | // synthesized in the method declaration. |
| 4248 | SmallVector<QualType, 4> ParamTypes; |
| 4249 | Sema::ExtParameterInfoBuilder ExtParamInfos; |
| 4250 | if (SemaRef.SubstParmTypes(D->getLocation(), D->parameters(), nullptr, |
| 4251 | TemplateArgs, ParamTypes, &Params, |
| 4252 | ExtParamInfos)) |
| 4253 | return nullptr; |
| 4254 | } |
| 4255 | |
| 4256 | return NewTInfo; |
| 4257 | } |
| 4258 | |
| 4259 | /// Introduce the instantiated function parameters into the local |
| 4260 | /// instantiation scope, and set the parameter names to those used |
| 4261 | /// in the template. |
| 4262 | static bool addInstantiatedParametersToScope(Sema &S, FunctionDecl *Function, |
| 4263 | const FunctionDecl *PatternDecl, |
| 4264 | LocalInstantiationScope &Scope, |
| 4265 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 4266 | unsigned FParamIdx = 0; |
| 4267 | for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I) { |
| 4268 | const ParmVarDecl *PatternParam = PatternDecl->getParamDecl(I); |
| 4269 | if (!PatternParam->isParameterPack()) { |
| 4270 | // Simple case: not a parameter pack. |
| 4271 | assert(FParamIdx < Function->getNumParams())((FParamIdx < Function->getNumParams()) ? static_cast< void> (0) : __assert_fail ("FParamIdx < Function->getNumParams()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4271, __PRETTY_FUNCTION__)); |
| 4272 | ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx); |
| 4273 | FunctionParam->setDeclName(PatternParam->getDeclName()); |
| 4274 | // If the parameter's type is not dependent, update it to match the type |
| 4275 | // in the pattern. They can differ in top-level cv-qualifiers, and we want |
| 4276 | // the pattern's type here. If the type is dependent, they can't differ, |
| 4277 | // per core issue 1668. Substitute into the type from the pattern, in case |
| 4278 | // it's instantiation-dependent. |
| 4279 | // FIXME: Updating the type to work around this is at best fragile. |
| 4280 | if (!PatternDecl->getType()->isDependentType()) { |
| 4281 | QualType T = S.SubstType(PatternParam->getType(), TemplateArgs, |
| 4282 | FunctionParam->getLocation(), |
| 4283 | FunctionParam->getDeclName()); |
| 4284 | if (T.isNull()) |
| 4285 | return true; |
| 4286 | FunctionParam->setType(T); |
| 4287 | } |
| 4288 | |
| 4289 | Scope.InstantiatedLocal(PatternParam, FunctionParam); |
| 4290 | ++FParamIdx; |
| 4291 | continue; |
| 4292 | } |
| 4293 | |
| 4294 | // Expand the parameter pack. |
| 4295 | Scope.MakeInstantiatedLocalArgPack(PatternParam); |
| 4296 | Optional<unsigned> NumArgumentsInExpansion |
| 4297 | = S.getNumArgumentsInExpansion(PatternParam->getType(), TemplateArgs); |
| 4298 | if (NumArgumentsInExpansion) { |
| 4299 | QualType PatternType = |
| 4300 | PatternParam->getType()->castAs<PackExpansionType>()->getPattern(); |
| 4301 | for (unsigned Arg = 0; Arg < *NumArgumentsInExpansion; ++Arg) { |
| 4302 | ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx); |
| 4303 | FunctionParam->setDeclName(PatternParam->getDeclName()); |
| 4304 | if (!PatternDecl->getType()->isDependentType()) { |
| 4305 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(S, Arg); |
| 4306 | QualType T = S.SubstType(PatternType, TemplateArgs, |
| 4307 | FunctionParam->getLocation(), |
| 4308 | FunctionParam->getDeclName()); |
| 4309 | if (T.isNull()) |
| 4310 | return true; |
| 4311 | FunctionParam->setType(T); |
| 4312 | } |
| 4313 | |
| 4314 | Scope.InstantiatedLocalPackArg(PatternParam, FunctionParam); |
| 4315 | ++FParamIdx; |
| 4316 | } |
| 4317 | } |
| 4318 | } |
| 4319 | |
| 4320 | return false; |
| 4321 | } |
| 4322 | |
| 4323 | bool Sema::InstantiateDefaultArgument(SourceLocation CallLoc, FunctionDecl *FD, |
| 4324 | ParmVarDecl *Param) { |
| 4325 | assert(Param->hasUninstantiatedDefaultArg())((Param->hasUninstantiatedDefaultArg()) ? static_cast<void > (0) : __assert_fail ("Param->hasUninstantiatedDefaultArg()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4325, __PRETTY_FUNCTION__)); |
| 4326 | Expr *UninstExpr = Param->getUninstantiatedDefaultArg(); |
| 4327 | |
| 4328 | EnterExpressionEvaluationContext EvalContext( |
| 4329 | *this, ExpressionEvaluationContext::PotentiallyEvaluated, Param); |
| 4330 | |
| 4331 | // Instantiate the expression. |
| 4332 | // |
| 4333 | // FIXME: Pass in a correct Pattern argument, otherwise |
| 4334 | // getTemplateInstantiationArgs uses the lexical context of FD, e.g. |
| 4335 | // |
| 4336 | // template<typename T> |
| 4337 | // struct A { |
| 4338 | // static int FooImpl(); |
| 4339 | // |
| 4340 | // template<typename Tp> |
| 4341 | // // bug: default argument A<T>::FooImpl() is evaluated with 2-level |
| 4342 | // // template argument list [[T], [Tp]], should be [[Tp]]. |
| 4343 | // friend A<Tp> Foo(int a); |
| 4344 | // }; |
| 4345 | // |
| 4346 | // template<typename T> |
| 4347 | // A<T> Foo(int a = A<T>::FooImpl()); |
| 4348 | MultiLevelTemplateArgumentList TemplateArgs |
| 4349 | = getTemplateInstantiationArgs(FD, nullptr, /*RelativeToPrimary=*/true); |
| 4350 | |
| 4351 | InstantiatingTemplate Inst(*this, CallLoc, Param, |
| 4352 | TemplateArgs.getInnermost()); |
| 4353 | if (Inst.isInvalid()) |
| 4354 | return true; |
| 4355 | if (Inst.isAlreadyInstantiating()) { |
| 4356 | Diag(Param->getBeginLoc(), diag::err_recursive_default_argument) << FD; |
| 4357 | Param->setInvalidDecl(); |
| 4358 | return true; |
| 4359 | } |
| 4360 | |
| 4361 | ExprResult Result; |
| 4362 | { |
| 4363 | // C++ [dcl.fct.default]p5: |
| 4364 | // The names in the [default argument] expression are bound, and |
| 4365 | // the semantic constraints are checked, at the point where the |
| 4366 | // default argument expression appears. |
| 4367 | ContextRAII SavedContext(*this, FD); |
| 4368 | LocalInstantiationScope Local(*this); |
| 4369 | |
| 4370 | FunctionDecl *Pattern = FD->getTemplateInstantiationPattern( |
| 4371 | /*ForDefinition*/ false); |
| 4372 | if (addInstantiatedParametersToScope(*this, FD, Pattern, Local, |
| 4373 | TemplateArgs)) |
| 4374 | return true; |
| 4375 | |
| 4376 | runWithSufficientStackSpace(CallLoc, [&] { |
| 4377 | Result = SubstInitializer(UninstExpr, TemplateArgs, |
| 4378 | /*DirectInit*/false); |
| 4379 | }); |
| 4380 | } |
| 4381 | if (Result.isInvalid()) |
| 4382 | return true; |
| 4383 | |
| 4384 | // Check the expression as an initializer for the parameter. |
| 4385 | InitializedEntity Entity |
| 4386 | = InitializedEntity::InitializeParameter(Context, Param); |
| 4387 | InitializationKind Kind = InitializationKind::CreateCopy( |
| 4388 | Param->getLocation(), |
| 4389 | /*FIXME:EqualLoc*/ UninstExpr->getBeginLoc()); |
| 4390 | Expr *ResultE = Result.getAs<Expr>(); |
| 4391 | |
| 4392 | InitializationSequence InitSeq(*this, Entity, Kind, ResultE); |
| 4393 | Result = InitSeq.Perform(*this, Entity, Kind, ResultE); |
| 4394 | if (Result.isInvalid()) |
| 4395 | return true; |
| 4396 | |
| 4397 | Result = |
| 4398 | ActOnFinishFullExpr(Result.getAs<Expr>(), Param->getOuterLocStart(), |
| 4399 | /*DiscardedValue*/ false); |
| 4400 | if (Result.isInvalid()) |
| 4401 | return true; |
| 4402 | |
| 4403 | // Remember the instantiated default argument. |
| 4404 | Param->setDefaultArg(Result.getAs<Expr>()); |
| 4405 | if (ASTMutationListener *L = getASTMutationListener()) |
| 4406 | L->DefaultArgumentInstantiated(Param); |
| 4407 | |
| 4408 | return false; |
| 4409 | } |
| 4410 | |
| 4411 | void Sema::InstantiateExceptionSpec(SourceLocation PointOfInstantiation, |
| 4412 | FunctionDecl *Decl) { |
| 4413 | const FunctionProtoType *Proto = Decl->getType()->castAs<FunctionProtoType>(); |
| 4414 | if (Proto->getExceptionSpecType() != EST_Uninstantiated) |
| 4415 | return; |
| 4416 | |
| 4417 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Decl, |
| 4418 | InstantiatingTemplate::ExceptionSpecification()); |
| 4419 | if (Inst.isInvalid()) { |
| 4420 | // We hit the instantiation depth limit. Clear the exception specification |
| 4421 | // so that our callers don't have to cope with EST_Uninstantiated. |
| 4422 | UpdateExceptionSpec(Decl, EST_None); |
| 4423 | return; |
| 4424 | } |
| 4425 | if (Inst.isAlreadyInstantiating()) { |
| 4426 | // This exception specification indirectly depends on itself. Reject. |
| 4427 | // FIXME: Corresponding rule in the standard? |
| 4428 | Diag(PointOfInstantiation, diag::err_exception_spec_cycle) << Decl; |
| 4429 | UpdateExceptionSpec(Decl, EST_None); |
| 4430 | return; |
| 4431 | } |
| 4432 | |
| 4433 | // Enter the scope of this instantiation. We don't use |
| 4434 | // PushDeclContext because we don't have a scope. |
| 4435 | Sema::ContextRAII savedContext(*this, Decl); |
| 4436 | LocalInstantiationScope Scope(*this); |
| 4437 | |
| 4438 | MultiLevelTemplateArgumentList TemplateArgs = |
| 4439 | getTemplateInstantiationArgs(Decl, nullptr, /*RelativeToPrimary*/true); |
| 4440 | |
| 4441 | // FIXME: We can't use getTemplateInstantiationPattern(false) in general |
| 4442 | // here, because for a non-defining friend declaration in a class template, |
| 4443 | // we don't store enough information to map back to the friend declaration in |
| 4444 | // the template. |
| 4445 | FunctionDecl *Template = Proto->getExceptionSpecTemplate(); |
| 4446 | if (addInstantiatedParametersToScope(*this, Decl, Template, Scope, |
| 4447 | TemplateArgs)) { |
| 4448 | UpdateExceptionSpec(Decl, EST_None); |
| 4449 | return; |
| 4450 | } |
| 4451 | |
| 4452 | SubstExceptionSpec(Decl, Template->getType()->castAs<FunctionProtoType>(), |
| 4453 | TemplateArgs); |
| 4454 | } |
| 4455 | |
| 4456 | bool Sema::CheckInstantiatedFunctionTemplateConstraints( |
| 4457 | SourceLocation PointOfInstantiation, FunctionDecl *Decl, |
| 4458 | ArrayRef<TemplateArgument> TemplateArgs, |
| 4459 | ConstraintSatisfaction &Satisfaction) { |
| 4460 | // In most cases we're not going to have constraints, so check for that first. |
| 4461 | FunctionTemplateDecl *Template = Decl->getPrimaryTemplate(); |
| 4462 | // Note - code synthesis context for the constraints check is created |
| 4463 | // inside CheckConstraintsSatisfaction. |
| 4464 | SmallVector<const Expr *, 3> TemplateAC; |
| 4465 | Template->getAssociatedConstraints(TemplateAC); |
| 4466 | if (TemplateAC.empty()) { |
| 4467 | Satisfaction.IsSatisfied = true; |
| 4468 | return false; |
| 4469 | } |
| 4470 | |
| 4471 | // Enter the scope of this instantiation. We don't use |
| 4472 | // PushDeclContext because we don't have a scope. |
| 4473 | Sema::ContextRAII savedContext(*this, Decl); |
| 4474 | LocalInstantiationScope Scope(*this); |
| 4475 | |
| 4476 | // If this is not an explicit specialization - we need to get the instantiated |
| 4477 | // version of the template arguments and add them to scope for the |
| 4478 | // substitution. |
| 4479 | if (Decl->isTemplateInstantiation()) { |
| 4480 | InstantiatingTemplate Inst(*this, Decl->getPointOfInstantiation(), |
| 4481 | InstantiatingTemplate::ConstraintsCheck{}, Decl->getPrimaryTemplate(), |
| 4482 | TemplateArgs, SourceRange()); |
| 4483 | if (Inst.isInvalid()) |
| 4484 | return true; |
| 4485 | MultiLevelTemplateArgumentList MLTAL( |
| 4486 | *Decl->getTemplateSpecializationArgs()); |
| 4487 | if (addInstantiatedParametersToScope( |
| 4488 | *this, Decl, Decl->getPrimaryTemplate()->getTemplatedDecl(), |
| 4489 | Scope, MLTAL)) |
| 4490 | return true; |
| 4491 | } |
| 4492 | Qualifiers ThisQuals; |
| 4493 | CXXRecordDecl *Record = nullptr; |
| 4494 | if (auto *Method = dyn_cast<CXXMethodDecl>(Decl)) { |
| 4495 | ThisQuals = Method->getMethodQualifiers(); |
| 4496 | Record = Method->getParent(); |
| 4497 | } |
| 4498 | CXXThisScopeRAII ThisScope(*this, Record, ThisQuals, Record != nullptr); |
| 4499 | return CheckConstraintSatisfaction(Template, TemplateAC, TemplateArgs, |
| 4500 | PointOfInstantiation, Satisfaction); |
| 4501 | } |
| 4502 | |
| 4503 | /// Initializes the common fields of an instantiation function |
| 4504 | /// declaration (New) from the corresponding fields of its template (Tmpl). |
| 4505 | /// |
| 4506 | /// \returns true if there was an error |
| 4507 | bool |
| 4508 | TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New, |
| 4509 | FunctionDecl *Tmpl) { |
| 4510 | New->setImplicit(Tmpl->isImplicit()); |
| 4511 | |
| 4512 | // Forward the mangling number from the template to the instantiated decl. |
| 4513 | SemaRef.Context.setManglingNumber(New, |
| 4514 | SemaRef.Context.getManglingNumber(Tmpl)); |
| 4515 | |
| 4516 | // If we are performing substituting explicitly-specified template arguments |
| 4517 | // or deduced template arguments into a function template and we reach this |
| 4518 | // point, we are now past the point where SFINAE applies and have committed |
| 4519 | // to keeping the new function template specialization. We therefore |
| 4520 | // convert the active template instantiation for the function template |
| 4521 | // into a template instantiation for this specific function template |
| 4522 | // specialization, which is not a SFINAE context, so that we diagnose any |
| 4523 | // further errors in the declaration itself. |
| 4524 | // |
| 4525 | // FIXME: This is a hack. |
| 4526 | typedef Sema::CodeSynthesisContext ActiveInstType; |
| 4527 | ActiveInstType &ActiveInst = SemaRef.CodeSynthesisContexts.back(); |
| 4528 | if (ActiveInst.Kind == ActiveInstType::ExplicitTemplateArgumentSubstitution || |
| 4529 | ActiveInst.Kind == ActiveInstType::DeducedTemplateArgumentSubstitution) { |
| 4530 | if (FunctionTemplateDecl *FunTmpl |
| 4531 | = dyn_cast<FunctionTemplateDecl>(ActiveInst.Entity)) { |
| 4532 | assert(FunTmpl->getTemplatedDecl() == Tmpl &&((FunTmpl->getTemplatedDecl() == Tmpl && "Deduction from the wrong function template?" ) ? static_cast<void> (0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4533, __PRETTY_FUNCTION__)) |
| 4533 | "Deduction from the wrong function template?")((FunTmpl->getTemplatedDecl() == Tmpl && "Deduction from the wrong function template?" ) ? static_cast<void> (0) : __assert_fail ("FunTmpl->getTemplatedDecl() == Tmpl && \"Deduction from the wrong function template?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4533, __PRETTY_FUNCTION__)); |
| 4534 | (void) FunTmpl; |
| 4535 | SemaRef.InstantiatingSpecializations.erase( |
| 4536 | {ActiveInst.Entity->getCanonicalDecl(), ActiveInst.Kind}); |
| 4537 | atTemplateEnd(SemaRef.TemplateInstCallbacks, SemaRef, ActiveInst); |
| 4538 | ActiveInst.Kind = ActiveInstType::TemplateInstantiation; |
| 4539 | ActiveInst.Entity = New; |
| 4540 | atTemplateBegin(SemaRef.TemplateInstCallbacks, SemaRef, ActiveInst); |
| 4541 | } |
| 4542 | } |
| 4543 | |
| 4544 | const FunctionProtoType *Proto = Tmpl->getType()->getAs<FunctionProtoType>(); |
| 4545 | assert(Proto && "Function template without prototype?")((Proto && "Function template without prototype?") ? static_cast <void> (0) : __assert_fail ("Proto && \"Function template without prototype?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4545, __PRETTY_FUNCTION__)); |
| 4546 | |
| 4547 | if (Proto->hasExceptionSpec() || Proto->getNoReturnAttr()) { |
| 4548 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); |
| 4549 | |
| 4550 | // DR1330: In C++11, defer instantiation of a non-trivial |
| 4551 | // exception specification. |
| 4552 | // DR1484: Local classes and their members are instantiated along with the |
| 4553 | // containing function. |
| 4554 | if (SemaRef.getLangOpts().CPlusPlus11 && |
| 4555 | EPI.ExceptionSpec.Type != EST_None && |
| 4556 | EPI.ExceptionSpec.Type != EST_DynamicNone && |
| 4557 | EPI.ExceptionSpec.Type != EST_BasicNoexcept && |
| 4558 | !Tmpl->isInLocalScopeForInstantiation()) { |
| 4559 | FunctionDecl *ExceptionSpecTemplate = Tmpl; |
| 4560 | if (EPI.ExceptionSpec.Type == EST_Uninstantiated) |
| 4561 | ExceptionSpecTemplate = EPI.ExceptionSpec.SourceTemplate; |
| 4562 | ExceptionSpecificationType NewEST = EST_Uninstantiated; |
| 4563 | if (EPI.ExceptionSpec.Type == EST_Unevaluated) |
| 4564 | NewEST = EST_Unevaluated; |
| 4565 | |
| 4566 | // Mark the function has having an uninstantiated exception specification. |
| 4567 | const FunctionProtoType *NewProto |
| 4568 | = New->getType()->getAs<FunctionProtoType>(); |
| 4569 | assert(NewProto && "Template instantiation without function prototype?")((NewProto && "Template instantiation without function prototype?" ) ? static_cast<void> (0) : __assert_fail ("NewProto && \"Template instantiation without function prototype?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4569, __PRETTY_FUNCTION__)); |
| 4570 | EPI = NewProto->getExtProtoInfo(); |
| 4571 | EPI.ExceptionSpec.Type = NewEST; |
| 4572 | EPI.ExceptionSpec.SourceDecl = New; |
| 4573 | EPI.ExceptionSpec.SourceTemplate = ExceptionSpecTemplate; |
| 4574 | New->setType(SemaRef.Context.getFunctionType( |
| 4575 | NewProto->getReturnType(), NewProto->getParamTypes(), EPI)); |
| 4576 | } else { |
| 4577 | Sema::ContextRAII SwitchContext(SemaRef, New); |
| 4578 | SemaRef.SubstExceptionSpec(New, Proto, TemplateArgs); |
| 4579 | } |
| 4580 | } |
| 4581 | |
| 4582 | // Get the definition. Leaves the variable unchanged if undefined. |
| 4583 | const FunctionDecl *Definition = Tmpl; |
| 4584 | Tmpl->isDefined(Definition); |
| 4585 | |
| 4586 | SemaRef.InstantiateAttrs(TemplateArgs, Definition, New, |
| 4587 | LateAttrs, StartingScope); |
| 4588 | |
| 4589 | return false; |
| 4590 | } |
| 4591 | |
| 4592 | /// Initializes common fields of an instantiated method |
| 4593 | /// declaration (New) from the corresponding fields of its template |
| 4594 | /// (Tmpl). |
| 4595 | /// |
| 4596 | /// \returns true if there was an error |
| 4597 | bool |
| 4598 | TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New, |
| 4599 | CXXMethodDecl *Tmpl) { |
| 4600 | if (InitFunctionInstantiation(New, Tmpl)) |
| 4601 | return true; |
| 4602 | |
| 4603 | if (isa<CXXDestructorDecl>(New) && SemaRef.getLangOpts().CPlusPlus11) |
| 4604 | SemaRef.AdjustDestructorExceptionSpec(cast<CXXDestructorDecl>(New)); |
| 4605 | |
| 4606 | New->setAccess(Tmpl->getAccess()); |
| 4607 | if (Tmpl->isVirtualAsWritten()) |
| 4608 | New->setVirtualAsWritten(true); |
| 4609 | |
| 4610 | // FIXME: New needs a pointer to Tmpl |
| 4611 | return false; |
| 4612 | } |
| 4613 | |
| 4614 | bool TemplateDeclInstantiator::SubstDefaultedFunction(FunctionDecl *New, |
| 4615 | FunctionDecl *Tmpl) { |
| 4616 | // Transfer across any unqualified lookups. |
| 4617 | if (auto *DFI = Tmpl->getDefaultedFunctionInfo()) { |
| 4618 | SmallVector<DeclAccessPair, 32> Lookups; |
| 4619 | Lookups.reserve(DFI->getUnqualifiedLookups().size()); |
| 4620 | bool AnyChanged = false; |
| 4621 | for (DeclAccessPair DA : DFI->getUnqualifiedLookups()) { |
| 4622 | NamedDecl *D = SemaRef.FindInstantiatedDecl(New->getLocation(), |
| 4623 | DA.getDecl(), TemplateArgs); |
| 4624 | if (!D) |
| 4625 | return true; |
| 4626 | AnyChanged |= (D != DA.getDecl()); |
| 4627 | Lookups.push_back(DeclAccessPair::make(D, DA.getAccess())); |
| 4628 | } |
| 4629 | |
| 4630 | // It's unlikely that substitution will change any declarations. Don't |
| 4631 | // store an unnecessary copy in that case. |
| 4632 | New->setDefaultedFunctionInfo( |
| 4633 | AnyChanged ? FunctionDecl::DefaultedFunctionInfo::Create( |
| 4634 | SemaRef.Context, Lookups) |
| 4635 | : DFI); |
| 4636 | } |
| 4637 | |
| 4638 | SemaRef.SetDeclDefaulted(New, Tmpl->getLocation()); |
| 4639 | return false; |
| 4640 | } |
| 4641 | |
| 4642 | /// Instantiate (or find existing instantiation of) a function template with a |
| 4643 | /// given set of template arguments. |
| 4644 | /// |
| 4645 | /// Usually this should not be used, and template argument deduction should be |
| 4646 | /// used in its place. |
| 4647 | FunctionDecl * |
| 4648 | Sema::InstantiateFunctionDeclaration(FunctionTemplateDecl *FTD, |
| 4649 | const TemplateArgumentList *Args, |
| 4650 | SourceLocation Loc) { |
| 4651 | FunctionDecl *FD = FTD->getTemplatedDecl(); |
| 4652 | |
| 4653 | sema::TemplateDeductionInfo Info(Loc); |
| 4654 | InstantiatingTemplate Inst( |
| 4655 | *this, Loc, FTD, Args->asArray(), |
| 4656 | CodeSynthesisContext::ExplicitTemplateArgumentSubstitution, Info); |
| 4657 | if (Inst.isInvalid()) |
| 4658 | return nullptr; |
| 4659 | |
| 4660 | ContextRAII SavedContext(*this, FD); |
| 4661 | MultiLevelTemplateArgumentList MArgs(*Args); |
| 4662 | |
| 4663 | return cast_or_null<FunctionDecl>(SubstDecl(FD, FD->getParent(), MArgs)); |
| 4664 | } |
| 4665 | |
| 4666 | /// Instantiate the definition of the given function from its |
| 4667 | /// template. |
| 4668 | /// |
| 4669 | /// \param PointOfInstantiation the point at which the instantiation was |
| 4670 | /// required. Note that this is not precisely a "point of instantiation" |
| 4671 | /// for the function, but it's close. |
| 4672 | /// |
| 4673 | /// \param Function the already-instantiated declaration of a |
| 4674 | /// function template specialization or member function of a class template |
| 4675 | /// specialization. |
| 4676 | /// |
| 4677 | /// \param Recursive if true, recursively instantiates any functions that |
| 4678 | /// are required by this instantiation. |
| 4679 | /// |
| 4680 | /// \param DefinitionRequired if true, then we are performing an explicit |
| 4681 | /// instantiation where the body of the function is required. Complain if |
| 4682 | /// there is no such body. |
| 4683 | void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, |
| 4684 | FunctionDecl *Function, |
| 4685 | bool Recursive, |
| 4686 | bool DefinitionRequired, |
| 4687 | bool AtEndOfTU) { |
| 4688 | if (Function->isInvalidDecl() || isa<CXXDeductionGuideDecl>(Function)) |
| 4689 | return; |
| 4690 | |
| 4691 | // Never instantiate an explicit specialization except if it is a class scope |
| 4692 | // explicit specialization. |
| 4693 | TemplateSpecializationKind TSK = |
| 4694 | Function->getTemplateSpecializationKindForInstantiation(); |
| 4695 | if (TSK == TSK_ExplicitSpecialization) |
| 4696 | return; |
| 4697 | |
| 4698 | // Don't instantiate a definition if we already have one. |
| 4699 | const FunctionDecl *ExistingDefn = nullptr; |
| 4700 | if (Function->isDefined(ExistingDefn, |
| 4701 | /*CheckForPendingFriendDefinition=*/true)) { |
| 4702 | if (ExistingDefn->isThisDeclarationADefinition()) |
| 4703 | return; |
| 4704 | |
| 4705 | // If we're asked to instantiate a function whose body comes from an |
| 4706 | // instantiated friend declaration, attach the instantiated body to the |
| 4707 | // corresponding declaration of the function. |
| 4708 | assert(ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition())((ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition ()) ? static_cast<void> (0) : __assert_fail ("ExistingDefn->isThisDeclarationInstantiatedFromAFriendDefinition()" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4708, __PRETTY_FUNCTION__)); |
| 4709 | Function = const_cast<FunctionDecl*>(ExistingDefn); |
| 4710 | } |
| 4711 | |
| 4712 | // Find the function body that we'll be substituting. |
| 4713 | const FunctionDecl *PatternDecl = Function->getTemplateInstantiationPattern(); |
| 4714 | assert(PatternDecl && "instantiating a non-template")((PatternDecl && "instantiating a non-template") ? static_cast <void> (0) : __assert_fail ("PatternDecl && \"instantiating a non-template\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4714, __PRETTY_FUNCTION__)); |
| 4715 | |
| 4716 | const FunctionDecl *PatternDef = PatternDecl->getDefinition(); |
| 4717 | Stmt *Pattern = nullptr; |
| 4718 | if (PatternDef) { |
| 4719 | Pattern = PatternDef->getBody(PatternDef); |
| 4720 | PatternDecl = PatternDef; |
| 4721 | if (PatternDef->willHaveBody()) |
| 4722 | PatternDef = nullptr; |
| 4723 | } |
| 4724 | |
| 4725 | // FIXME: We need to track the instantiation stack in order to know which |
| 4726 | // definitions should be visible within this instantiation. |
| 4727 | if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Function, |
| 4728 | Function->getInstantiatedFromMemberFunction(), |
| 4729 | PatternDecl, PatternDef, TSK, |
| 4730 | /*Complain*/DefinitionRequired)) { |
| 4731 | if (DefinitionRequired) |
| 4732 | Function->setInvalidDecl(); |
| 4733 | else if (TSK == TSK_ExplicitInstantiationDefinition) { |
| 4734 | // Try again at the end of the translation unit (at which point a |
| 4735 | // definition will be required). |
| 4736 | assert(!Recursive)((!Recursive) ? static_cast<void> (0) : __assert_fail ( "!Recursive", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4736, __PRETTY_FUNCTION__)); |
| 4737 | Function->setInstantiationIsPending(true); |
| 4738 | PendingInstantiations.push_back( |
| 4739 | std::make_pair(Function, PointOfInstantiation)); |
| 4740 | } else if (TSK == TSK_ImplicitInstantiation) { |
| 4741 | if (AtEndOfTU && !getDiagnostics().hasErrorOccurred() && |
| 4742 | !getSourceManager().isInSystemHeader(PatternDecl->getBeginLoc())) { |
| 4743 | Diag(PointOfInstantiation, diag::warn_func_template_missing) |
| 4744 | << Function; |
| 4745 | Diag(PatternDecl->getLocation(), diag::note_forward_template_decl); |
| 4746 | if (getLangOpts().CPlusPlus11) |
| 4747 | Diag(PointOfInstantiation, diag::note_inst_declaration_hint) |
| 4748 | << Function; |
| 4749 | } |
| 4750 | } |
| 4751 | |
| 4752 | return; |
| 4753 | } |
| 4754 | |
| 4755 | // Postpone late parsed template instantiations. |
| 4756 | if (PatternDecl->isLateTemplateParsed() && |
| 4757 | !LateTemplateParser) { |
| 4758 | Function->setInstantiationIsPending(true); |
| 4759 | LateParsedInstantiations.push_back( |
| 4760 | std::make_pair(Function, PointOfInstantiation)); |
| 4761 | return; |
| 4762 | } |
| 4763 | |
| 4764 | llvm::TimeTraceScope TimeScope("InstantiateFunction", [&]() { |
| 4765 | std::string Name; |
| 4766 | llvm::raw_string_ostream OS(Name); |
| 4767 | Function->getNameForDiagnostic(OS, getPrintingPolicy(), |
| 4768 | /*Qualified=*/true); |
| 4769 | return Name; |
| 4770 | }); |
| 4771 | |
| 4772 | // If we're performing recursive template instantiation, create our own |
| 4773 | // queue of pending implicit instantiations that we will instantiate later, |
| 4774 | // while we're still within our own instantiation context. |
| 4775 | // This has to happen before LateTemplateParser below is called, so that |
| 4776 | // it marks vtables used in late parsed templates as used. |
| 4777 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
| 4778 | /*Enabled=*/Recursive); |
| 4779 | LocalEagerInstantiationScope LocalInstantiations(*this); |
| 4780 | |
| 4781 | // Call the LateTemplateParser callback if there is a need to late parse |
| 4782 | // a templated function definition. |
| 4783 | if (!Pattern && PatternDecl->isLateTemplateParsed() && |
| 4784 | LateTemplateParser) { |
| 4785 | // FIXME: Optimize to allow individual templates to be deserialized. |
| 4786 | if (PatternDecl->isFromASTFile()) |
| 4787 | ExternalSource->ReadLateParsedTemplates(LateParsedTemplateMap); |
| 4788 | |
| 4789 | auto LPTIter = LateParsedTemplateMap.find(PatternDecl); |
| 4790 | assert(LPTIter != LateParsedTemplateMap.end() &&((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate" ) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4791, __PRETTY_FUNCTION__)) |
| 4791 | "missing LateParsedTemplate")((LPTIter != LateParsedTemplateMap.end() && "missing LateParsedTemplate" ) ? static_cast<void> (0) : __assert_fail ("LPTIter != LateParsedTemplateMap.end() && \"missing LateParsedTemplate\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4791, __PRETTY_FUNCTION__)); |
| 4792 | LateTemplateParser(OpaqueParser, *LPTIter->second); |
| 4793 | Pattern = PatternDecl->getBody(PatternDecl); |
| 4794 | } |
| 4795 | |
| 4796 | // Note, we should never try to instantiate a deleted function template. |
| 4797 | assert((Pattern || PatternDecl->isDefaulted() ||(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4799, __PRETTY_FUNCTION__)) |
| 4798 | PatternDecl->hasSkippedBody()) &&(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4799, __PRETTY_FUNCTION__)) |
| 4799 | "unexpected kind of function template definition")(((Pattern || PatternDecl->isDefaulted() || PatternDecl-> hasSkippedBody()) && "unexpected kind of function template definition" ) ? static_cast<void> (0) : __assert_fail ("(Pattern || PatternDecl->isDefaulted() || PatternDecl->hasSkippedBody()) && \"unexpected kind of function template definition\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4799, __PRETTY_FUNCTION__)); |
| 4800 | |
| 4801 | // C++1y [temp.explicit]p10: |
| 4802 | // Except for inline functions, declarations with types deduced from their |
| 4803 | // initializer or return value, and class template specializations, other |
| 4804 | // explicit instantiation declarations have the effect of suppressing the |
| 4805 | // implicit instantiation of the entity to which they refer. |
| 4806 | if (TSK == TSK_ExplicitInstantiationDeclaration && |
| 4807 | !PatternDecl->isInlined() && |
| 4808 | !PatternDecl->getReturnType()->getContainedAutoType()) |
| 4809 | return; |
| 4810 | |
| 4811 | if (PatternDecl->isInlined()) { |
| 4812 | // Function, and all later redeclarations of it (from imported modules, |
| 4813 | // for instance), are now implicitly inline. |
| 4814 | for (auto *D = Function->getMostRecentDecl(); /**/; |
| 4815 | D = D->getPreviousDecl()) { |
| 4816 | D->setImplicitlyInline(); |
| 4817 | if (D == Function) |
| 4818 | break; |
| 4819 | } |
| 4820 | } |
| 4821 | |
| 4822 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Function); |
| 4823 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
| 4824 | return; |
| 4825 | PrettyDeclStackTraceEntry CrashInfo(Context, Function, SourceLocation(), |
| 4826 | "instantiating function definition"); |
| 4827 | |
| 4828 | // The instantiation is visible here, even if it was first declared in an |
| 4829 | // unimported module. |
| 4830 | Function->setVisibleDespiteOwningModule(); |
| 4831 | |
| 4832 | // Copy the inner loc start from the pattern. |
| 4833 | Function->setInnerLocStart(PatternDecl->getInnerLocStart()); |
| 4834 | |
| 4835 | EnterExpressionEvaluationContext EvalContext( |
| 4836 | *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| 4837 | |
| 4838 | // Introduce a new scope where local variable instantiations will be |
| 4839 | // recorded, unless we're actually a member function within a local |
| 4840 | // class, in which case we need to merge our results with the parent |
| 4841 | // scope (of the enclosing function). |
| 4842 | bool MergeWithParentScope = false; |
| 4843 | if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Function->getDeclContext())) |
| 4844 | MergeWithParentScope = Rec->isLocalClass(); |
| 4845 | |
| 4846 | LocalInstantiationScope Scope(*this, MergeWithParentScope); |
| 4847 | |
| 4848 | if (PatternDecl->isDefaulted()) |
| 4849 | SetDeclDefaulted(Function, PatternDecl->getLocation()); |
| 4850 | else { |
| 4851 | MultiLevelTemplateArgumentList TemplateArgs = |
| 4852 | getTemplateInstantiationArgs(Function, nullptr, false, PatternDecl); |
| 4853 | |
| 4854 | // Substitute into the qualifier; we can get a substitution failure here |
| 4855 | // through evil use of alias templates. |
| 4856 | // FIXME: Is CurContext correct for this? Should we go to the (instantiation |
| 4857 | // of the) lexical context of the pattern? |
| 4858 | SubstQualifier(*this, PatternDecl, Function, TemplateArgs); |
| 4859 | |
| 4860 | ActOnStartOfFunctionDef(nullptr, Function); |
| 4861 | |
| 4862 | // Enter the scope of this instantiation. We don't use |
| 4863 | // PushDeclContext because we don't have a scope. |
| 4864 | Sema::ContextRAII savedContext(*this, Function); |
| 4865 | |
| 4866 | if (addInstantiatedParametersToScope(*this, Function, PatternDecl, Scope, |
| 4867 | TemplateArgs)) |
| 4868 | return; |
| 4869 | |
| 4870 | StmtResult Body; |
| 4871 | if (PatternDecl->hasSkippedBody()) { |
| 4872 | ActOnSkippedFunctionBody(Function); |
| 4873 | Body = nullptr; |
| 4874 | } else { |
| 4875 | if (CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(Function)) { |
| 4876 | // If this is a constructor, instantiate the member initializers. |
| 4877 | InstantiateMemInitializers(Ctor, cast<CXXConstructorDecl>(PatternDecl), |
| 4878 | TemplateArgs); |
| 4879 | |
| 4880 | // If this is an MS ABI dllexport default constructor, instantiate any |
| 4881 | // default arguments. |
| 4882 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && |
| 4883 | Ctor->isDefaultConstructor()) { |
| 4884 | InstantiateDefaultCtorDefaultArgs(Ctor); |
| 4885 | } |
| 4886 | } |
| 4887 | |
| 4888 | // Instantiate the function body. |
| 4889 | Body = SubstStmt(Pattern, TemplateArgs); |
| 4890 | |
| 4891 | if (Body.isInvalid()) |
| 4892 | Function->setInvalidDecl(); |
| 4893 | } |
| 4894 | // FIXME: finishing the function body while in an expression evaluation |
| 4895 | // context seems wrong. Investigate more. |
| 4896 | ActOnFinishFunctionBody(Function, Body.get(), /*IsInstantiation=*/true); |
| 4897 | |
| 4898 | PerformDependentDiagnostics(PatternDecl, TemplateArgs); |
| 4899 | |
| 4900 | if (auto *Listener = getASTMutationListener()) |
| 4901 | Listener->FunctionDefinitionInstantiated(Function); |
| 4902 | |
| 4903 | savedContext.pop(); |
| 4904 | } |
| 4905 | |
| 4906 | DeclGroupRef DG(Function); |
| 4907 | Consumer.HandleTopLevelDecl(DG); |
| 4908 | |
| 4909 | // This class may have local implicit instantiations that need to be |
| 4910 | // instantiation within this scope. |
| 4911 | LocalInstantiations.perform(); |
| 4912 | Scope.Exit(); |
| 4913 | GlobalInstantiations.perform(); |
| 4914 | } |
| 4915 | |
| 4916 | VarTemplateSpecializationDecl *Sema::BuildVarTemplateInstantiation( |
| 4917 | VarTemplateDecl *VarTemplate, VarDecl *FromVar, |
| 4918 | const TemplateArgumentList &TemplateArgList, |
| 4919 | const TemplateArgumentListInfo &TemplateArgsInfo, |
| 4920 | SmallVectorImpl<TemplateArgument> &Converted, |
| 4921 | SourceLocation PointOfInstantiation, |
| 4922 | LateInstantiatedAttrVec *LateAttrs, |
| 4923 | LocalInstantiationScope *StartingScope) { |
| 4924 | if (FromVar->isInvalidDecl()) |
| 4925 | return nullptr; |
| 4926 | |
| 4927 | InstantiatingTemplate Inst(*this, PointOfInstantiation, FromVar); |
| 4928 | if (Inst.isInvalid()) |
| 4929 | return nullptr; |
| 4930 | |
| 4931 | MultiLevelTemplateArgumentList TemplateArgLists; |
| 4932 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgList); |
| 4933 | |
| 4934 | // Instantiate the first declaration of the variable template: for a partial |
| 4935 | // specialization of a static data member template, the first declaration may |
| 4936 | // or may not be the declaration in the class; if it's in the class, we want |
| 4937 | // to instantiate a member in the class (a declaration), and if it's outside, |
| 4938 | // we want to instantiate a definition. |
| 4939 | // |
| 4940 | // If we're instantiating an explicitly-specialized member template or member |
| 4941 | // partial specialization, don't do this. The member specialization completely |
| 4942 | // replaces the original declaration in this case. |
| 4943 | bool IsMemberSpec = false; |
| 4944 | if (VarTemplatePartialSpecializationDecl *PartialSpec = |
| 4945 | dyn_cast<VarTemplatePartialSpecializationDecl>(FromVar)) |
| 4946 | IsMemberSpec = PartialSpec->isMemberSpecialization(); |
| 4947 | else if (VarTemplateDecl *FromTemplate = FromVar->getDescribedVarTemplate()) |
| 4948 | IsMemberSpec = FromTemplate->isMemberSpecialization(); |
| 4949 | if (!IsMemberSpec) |
| 4950 | FromVar = FromVar->getFirstDecl(); |
| 4951 | |
| 4952 | MultiLevelTemplateArgumentList MultiLevelList(TemplateArgList); |
| 4953 | TemplateDeclInstantiator Instantiator(*this, FromVar->getDeclContext(), |
| 4954 | MultiLevelList); |
| 4955 | |
| 4956 | // TODO: Set LateAttrs and StartingScope ... |
| 4957 | |
| 4958 | return cast_or_null<VarTemplateSpecializationDecl>( |
| 4959 | Instantiator.VisitVarTemplateSpecializationDecl( |
| 4960 | VarTemplate, FromVar, TemplateArgsInfo, Converted)); |
| 4961 | } |
| 4962 | |
| 4963 | /// Instantiates a variable template specialization by completing it |
| 4964 | /// with appropriate type information and initializer. |
| 4965 | VarTemplateSpecializationDecl *Sema::CompleteVarTemplateSpecializationDecl( |
| 4966 | VarTemplateSpecializationDecl *VarSpec, VarDecl *PatternDecl, |
| 4967 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 4968 | assert(PatternDecl->isThisDeclarationADefinition() &&((PatternDecl->isThisDeclarationADefinition() && "don't have a definition to instantiate from" ) ? static_cast<void> (0) : __assert_fail ("PatternDecl->isThisDeclarationADefinition() && \"don't have a definition to instantiate from\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4969, __PRETTY_FUNCTION__)) |
| 4969 | "don't have a definition to instantiate from")((PatternDecl->isThisDeclarationADefinition() && "don't have a definition to instantiate from" ) ? static_cast<void> (0) : __assert_fail ("PatternDecl->isThisDeclarationADefinition() && \"don't have a definition to instantiate from\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 4969, __PRETTY_FUNCTION__)); |
| 4970 | |
| 4971 | // Do substitution on the type of the declaration |
| 4972 | TypeSourceInfo *DI = |
| 4973 | SubstType(PatternDecl->getTypeSourceInfo(), TemplateArgs, |
| 4974 | PatternDecl->getTypeSpecStartLoc(), PatternDecl->getDeclName()); |
| 4975 | if (!DI) |
| 4976 | return nullptr; |
| 4977 | |
| 4978 | // Update the type of this variable template specialization. |
| 4979 | VarSpec->setType(DI->getType()); |
| 4980 | |
| 4981 | // Convert the declaration into a definition now. |
| 4982 | VarSpec->setCompleteDefinition(); |
| 4983 | |
| 4984 | // Instantiate the initializer. |
| 4985 | InstantiateVariableInitializer(VarSpec, PatternDecl, TemplateArgs); |
| 4986 | |
| 4987 | if (getLangOpts().OpenCL) |
| 4988 | deduceOpenCLAddressSpace(VarSpec); |
| 4989 | |
| 4990 | return VarSpec; |
| 4991 | } |
| 4992 | |
| 4993 | /// BuildVariableInstantiation - Used after a new variable has been created. |
| 4994 | /// Sets basic variable data and decides whether to postpone the |
| 4995 | /// variable instantiation. |
| 4996 | void Sema::BuildVariableInstantiation( |
| 4997 | VarDecl *NewVar, VarDecl *OldVar, |
| 4998 | const MultiLevelTemplateArgumentList &TemplateArgs, |
| 4999 | LateInstantiatedAttrVec *LateAttrs, DeclContext *Owner, |
| 5000 | LocalInstantiationScope *StartingScope, |
| 5001 | bool InstantiatingVarTemplate, |
| 5002 | VarTemplateSpecializationDecl *PrevDeclForVarTemplateSpecialization) { |
| 5003 | // Instantiating a partial specialization to produce a partial |
| 5004 | // specialization. |
| 5005 | bool InstantiatingVarTemplatePartialSpec = |
| 5006 | isa<VarTemplatePartialSpecializationDecl>(OldVar) && |
| 5007 | isa<VarTemplatePartialSpecializationDecl>(NewVar); |
| 5008 | // Instantiating from a variable template (or partial specialization) to |
| 5009 | // produce a variable template specialization. |
| 5010 | bool InstantiatingSpecFromTemplate = |
| 5011 | isa<VarTemplateSpecializationDecl>(NewVar) && |
| 5012 | (OldVar->getDescribedVarTemplate() || |
| 5013 | isa<VarTemplatePartialSpecializationDecl>(OldVar)); |
| 5014 | |
| 5015 | // If we are instantiating a local extern declaration, the |
| 5016 | // instantiation belongs lexically to the containing function. |
| 5017 | // If we are instantiating a static data member defined |
| 5018 | // out-of-line, the instantiation will have the same lexical |
| 5019 | // context (which will be a namespace scope) as the template. |
| 5020 | if (OldVar->isLocalExternDecl()) { |
| 5021 | NewVar->setLocalExternDecl(); |
| 5022 | NewVar->setLexicalDeclContext(Owner); |
| 5023 | } else if (OldVar->isOutOfLine()) |
| 5024 | NewVar->setLexicalDeclContext(OldVar->getLexicalDeclContext()); |
| 5025 | NewVar->setTSCSpec(OldVar->getTSCSpec()); |
| 5026 | NewVar->setInitStyle(OldVar->getInitStyle()); |
| 5027 | NewVar->setCXXForRangeDecl(OldVar->isCXXForRangeDecl()); |
| 5028 | NewVar->setObjCForDecl(OldVar->isObjCForDecl()); |
| 5029 | NewVar->setConstexpr(OldVar->isConstexpr()); |
| 5030 | MaybeAddCUDAConstantAttr(NewVar); |
| 5031 | NewVar->setInitCapture(OldVar->isInitCapture()); |
| 5032 | NewVar->setPreviousDeclInSameBlockScope( |
| 5033 | OldVar->isPreviousDeclInSameBlockScope()); |
| 5034 | NewVar->setAccess(OldVar->getAccess()); |
| 5035 | |
| 5036 | if (!OldVar->isStaticDataMember()) { |
| 5037 | if (OldVar->isUsed(false)) |
| 5038 | NewVar->setIsUsed(); |
| 5039 | NewVar->setReferenced(OldVar->isReferenced()); |
| 5040 | } |
| 5041 | |
| 5042 | InstantiateAttrs(TemplateArgs, OldVar, NewVar, LateAttrs, StartingScope); |
| 5043 | |
| 5044 | LookupResult Previous( |
| 5045 | *this, NewVar->getDeclName(), NewVar->getLocation(), |
| 5046 | NewVar->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage |
| 5047 | : Sema::LookupOrdinaryName, |
| 5048 | NewVar->isLocalExternDecl() ? Sema::ForExternalRedeclaration |
| 5049 | : forRedeclarationInCurContext()); |
| 5050 | |
| 5051 | if (NewVar->isLocalExternDecl() && OldVar->getPreviousDecl() && |
| 5052 | (!OldVar->getPreviousDecl()->getDeclContext()->isDependentContext() || |
| 5053 | OldVar->getPreviousDecl()->getDeclContext()==OldVar->getDeclContext())) { |
| 5054 | // We have a previous declaration. Use that one, so we merge with the |
| 5055 | // right type. |
| 5056 | if (NamedDecl *NewPrev = FindInstantiatedDecl( |
| 5057 | NewVar->getLocation(), OldVar->getPreviousDecl(), TemplateArgs)) |
| 5058 | Previous.addDecl(NewPrev); |
| 5059 | } else if (!isa<VarTemplateSpecializationDecl>(NewVar) && |
| 5060 | OldVar->hasLinkage()) { |
| 5061 | LookupQualifiedName(Previous, NewVar->getDeclContext(), false); |
| 5062 | } else if (PrevDeclForVarTemplateSpecialization) { |
| 5063 | Previous.addDecl(PrevDeclForVarTemplateSpecialization); |
| 5064 | } |
| 5065 | CheckVariableDeclaration(NewVar, Previous); |
| 5066 | |
| 5067 | if (!InstantiatingVarTemplate) { |
| 5068 | NewVar->getLexicalDeclContext()->addHiddenDecl(NewVar); |
| 5069 | if (!NewVar->isLocalExternDecl() || !NewVar->getPreviousDecl()) |
| 5070 | NewVar->getDeclContext()->makeDeclVisibleInContext(NewVar); |
| 5071 | } |
| 5072 | |
| 5073 | if (!OldVar->isOutOfLine()) { |
| 5074 | if (NewVar->getDeclContext()->isFunctionOrMethod()) |
| 5075 | CurrentInstantiationScope->InstantiatedLocal(OldVar, NewVar); |
| 5076 | } |
| 5077 | |
| 5078 | // Link instantiations of static data members back to the template from |
| 5079 | // which they were instantiated. |
| 5080 | // |
| 5081 | // Don't do this when instantiating a template (we link the template itself |
| 5082 | // back in that case) nor when instantiating a static data member template |
| 5083 | // (that's not a member specialization). |
| 5084 | if (NewVar->isStaticDataMember() && !InstantiatingVarTemplate && |
| 5085 | !InstantiatingSpecFromTemplate) |
| 5086 | NewVar->setInstantiationOfStaticDataMember(OldVar, |
| 5087 | TSK_ImplicitInstantiation); |
| 5088 | |
| 5089 | // If the pattern is an (in-class) explicit specialization, then the result |
| 5090 | // is also an explicit specialization. |
| 5091 | if (VarTemplateSpecializationDecl *OldVTSD = |
| 5092 | dyn_cast<VarTemplateSpecializationDecl>(OldVar)) { |
| 5093 | if (OldVTSD->getSpecializationKind() == TSK_ExplicitSpecialization && |
| 5094 | !isa<VarTemplatePartialSpecializationDecl>(OldVTSD)) |
| 5095 | cast<VarTemplateSpecializationDecl>(NewVar)->setSpecializationKind( |
| 5096 | TSK_ExplicitSpecialization); |
| 5097 | } |
| 5098 | |
| 5099 | // Forward the mangling number from the template to the instantiated decl. |
| 5100 | Context.setManglingNumber(NewVar, Context.getManglingNumber(OldVar)); |
| 5101 | Context.setStaticLocalNumber(NewVar, Context.getStaticLocalNumber(OldVar)); |
| 5102 | |
| 5103 | // Figure out whether to eagerly instantiate the initializer. |
| 5104 | if (InstantiatingVarTemplate || InstantiatingVarTemplatePartialSpec) { |
| 5105 | // We're producing a template. Don't instantiate the initializer yet. |
| 5106 | } else if (NewVar->getType()->isUndeducedType()) { |
| 5107 | // We need the type to complete the declaration of the variable. |
| 5108 | InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs); |
| 5109 | } else if (InstantiatingSpecFromTemplate || |
| 5110 | (OldVar->isInline() && OldVar->isThisDeclarationADefinition() && |
| 5111 | !NewVar->isThisDeclarationADefinition())) { |
| 5112 | // Delay instantiation of the initializer for variable template |
| 5113 | // specializations or inline static data members until a definition of the |
| 5114 | // variable is needed. |
| 5115 | } else { |
| 5116 | InstantiateVariableInitializer(NewVar, OldVar, TemplateArgs); |
| 5117 | } |
| 5118 | |
| 5119 | // Diagnose unused local variables with dependent types, where the diagnostic |
| 5120 | // will have been deferred. |
| 5121 | if (!NewVar->isInvalidDecl() && |
| 5122 | NewVar->getDeclContext()->isFunctionOrMethod() && |
| 5123 | OldVar->getType()->isDependentType()) |
| 5124 | DiagnoseUnusedDecl(NewVar); |
| 5125 | } |
| 5126 | |
| 5127 | /// Instantiate the initializer of a variable. |
| 5128 | void Sema::InstantiateVariableInitializer( |
| 5129 | VarDecl *Var, VarDecl *OldVar, |
| 5130 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 5131 | if (ASTMutationListener *L = getASTContext().getASTMutationListener()) |
| 5132 | L->VariableDefinitionInstantiated(Var); |
| 5133 | |
| 5134 | // We propagate the 'inline' flag with the initializer, because it |
| 5135 | // would otherwise imply that the variable is a definition for a |
| 5136 | // non-static data member. |
| 5137 | if (OldVar->isInlineSpecified()) |
| 5138 | Var->setInlineSpecified(); |
| 5139 | else if (OldVar->isInline()) |
| 5140 | Var->setImplicitlyInline(); |
| 5141 | |
| 5142 | if (OldVar->getInit()) { |
| 5143 | EnterExpressionEvaluationContext Evaluated( |
| 5144 | *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated, Var); |
| 5145 | |
| 5146 | // Instantiate the initializer. |
| 5147 | ExprResult Init; |
| 5148 | |
| 5149 | { |
| 5150 | ContextRAII SwitchContext(*this, Var->getDeclContext()); |
| 5151 | Init = SubstInitializer(OldVar->getInit(), TemplateArgs, |
| 5152 | OldVar->getInitStyle() == VarDecl::CallInit); |
| 5153 | } |
| 5154 | |
| 5155 | if (!Init.isInvalid()) { |
| 5156 | Expr *InitExpr = Init.get(); |
| 5157 | |
| 5158 | if (Var->hasAttr<DLLImportAttr>() && |
| 5159 | (!InitExpr || |
| 5160 | !InitExpr->isConstantInitializer(getASTContext(), false))) { |
| 5161 | // Do not dynamically initialize dllimport variables. |
| 5162 | } else if (InitExpr) { |
| 5163 | bool DirectInit = OldVar->isDirectInit(); |
| 5164 | AddInitializerToDecl(Var, InitExpr, DirectInit); |
| 5165 | } else |
| 5166 | ActOnUninitializedDecl(Var); |
| 5167 | } else { |
| 5168 | // FIXME: Not too happy about invalidating the declaration |
| 5169 | // because of a bogus initializer. |
| 5170 | Var->setInvalidDecl(); |
| 5171 | } |
| 5172 | } else { |
| 5173 | // `inline` variables are a definition and declaration all in one; we won't |
| 5174 | // pick up an initializer from anywhere else. |
| 5175 | if (Var->isStaticDataMember() && !Var->isInline()) { |
| 5176 | if (!Var->isOutOfLine()) |
| 5177 | return; |
| 5178 | |
| 5179 | // If the declaration inside the class had an initializer, don't add |
| 5180 | // another one to the out-of-line definition. |
| 5181 | if (OldVar->getFirstDecl()->hasInit()) |
| 5182 | return; |
| 5183 | } |
| 5184 | |
| 5185 | // We'll add an initializer to a for-range declaration later. |
| 5186 | if (Var->isCXXForRangeDecl() || Var->isObjCForDecl()) |
| 5187 | return; |
| 5188 | |
| 5189 | ActOnUninitializedDecl(Var); |
| 5190 | } |
| 5191 | |
| 5192 | if (getLangOpts().CUDA) |
| 5193 | checkAllowedCUDAInitializer(Var); |
| 5194 | } |
| 5195 | |
| 5196 | /// Instantiate the definition of the given variable from its |
| 5197 | /// template. |
| 5198 | /// |
| 5199 | /// \param PointOfInstantiation the point at which the instantiation was |
| 5200 | /// required. Note that this is not precisely a "point of instantiation" |
| 5201 | /// for the variable, but it's close. |
| 5202 | /// |
| 5203 | /// \param Var the already-instantiated declaration of a templated variable. |
| 5204 | /// |
| 5205 | /// \param Recursive if true, recursively instantiates any functions that |
| 5206 | /// are required by this instantiation. |
| 5207 | /// |
| 5208 | /// \param DefinitionRequired if true, then we are performing an explicit |
| 5209 | /// instantiation where a definition of the variable is required. Complain |
| 5210 | /// if there is no such definition. |
| 5211 | void Sema::InstantiateVariableDefinition(SourceLocation PointOfInstantiation, |
| 5212 | VarDecl *Var, bool Recursive, |
| 5213 | bool DefinitionRequired, bool AtEndOfTU) { |
| 5214 | if (Var->isInvalidDecl()) |
| 5215 | return; |
| 5216 | |
| 5217 | // Never instantiate an explicitly-specialized entity. |
| 5218 | TemplateSpecializationKind TSK = |
| 5219 | Var->getTemplateSpecializationKindForInstantiation(); |
| 5220 | if (TSK == TSK_ExplicitSpecialization) |
| 5221 | return; |
| 5222 | |
| 5223 | // Find the pattern and the arguments to substitute into it. |
| 5224 | VarDecl *PatternDecl = Var->getTemplateInstantiationPattern(); |
| 5225 | assert(PatternDecl && "no pattern for templated variable")((PatternDecl && "no pattern for templated variable") ? static_cast<void> (0) : __assert_fail ("PatternDecl && \"no pattern for templated variable\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5225, __PRETTY_FUNCTION__)); |
| 5226 | MultiLevelTemplateArgumentList TemplateArgs = |
| 5227 | getTemplateInstantiationArgs(Var); |
| 5228 | |
| 5229 | VarTemplateSpecializationDecl *VarSpec = |
| 5230 | dyn_cast<VarTemplateSpecializationDecl>(Var); |
| 5231 | if (VarSpec) { |
| 5232 | // If this is a static data member template, there might be an |
| 5233 | // uninstantiated initializer on the declaration. If so, instantiate |
| 5234 | // it now. |
| 5235 | // |
| 5236 | // FIXME: This largely duplicates what we would do below. The difference |
| 5237 | // is that along this path we may instantiate an initializer from an |
| 5238 | // in-class declaration of the template and instantiate the definition |
| 5239 | // from a separate out-of-class definition. |
| 5240 | if (PatternDecl->isStaticDataMember() && |
| 5241 | (PatternDecl = PatternDecl->getFirstDecl())->hasInit() && |
| 5242 | !Var->hasInit()) { |
| 5243 | // FIXME: Factor out the duplicated instantiation context setup/tear down |
| 5244 | // code here. |
| 5245 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Var); |
| 5246 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
| 5247 | return; |
| 5248 | PrettyDeclStackTraceEntry CrashInfo(Context, Var, SourceLocation(), |
| 5249 | "instantiating variable initializer"); |
| 5250 | |
| 5251 | // The instantiation is visible here, even if it was first declared in an |
| 5252 | // unimported module. |
| 5253 | Var->setVisibleDespiteOwningModule(); |
| 5254 | |
| 5255 | // If we're performing recursive template instantiation, create our own |
| 5256 | // queue of pending implicit instantiations that we will instantiate |
| 5257 | // later, while we're still within our own instantiation context. |
| 5258 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
| 5259 | /*Enabled=*/Recursive); |
| 5260 | LocalInstantiationScope Local(*this); |
| 5261 | LocalEagerInstantiationScope LocalInstantiations(*this); |
| 5262 | |
| 5263 | // Enter the scope of this instantiation. We don't use |
| 5264 | // PushDeclContext because we don't have a scope. |
| 5265 | ContextRAII PreviousContext(*this, Var->getDeclContext()); |
| 5266 | InstantiateVariableInitializer(Var, PatternDecl, TemplateArgs); |
| 5267 | PreviousContext.pop(); |
| 5268 | |
| 5269 | // This variable may have local implicit instantiations that need to be |
| 5270 | // instantiated within this scope. |
| 5271 | LocalInstantiations.perform(); |
| 5272 | Local.Exit(); |
| 5273 | GlobalInstantiations.perform(); |
| 5274 | } |
| 5275 | } else { |
| 5276 | assert(Var->isStaticDataMember() && PatternDecl->isStaticDataMember() &&((Var->isStaticDataMember() && PatternDecl->isStaticDataMember () && "not a static data member?") ? static_cast<void > (0) : __assert_fail ("Var->isStaticDataMember() && PatternDecl->isStaticDataMember() && \"not a static data member?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5277, __PRETTY_FUNCTION__)) |
| 5277 | "not a static data member?")((Var->isStaticDataMember() && PatternDecl->isStaticDataMember () && "not a static data member?") ? static_cast<void > (0) : __assert_fail ("Var->isStaticDataMember() && PatternDecl->isStaticDataMember() && \"not a static data member?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5277, __PRETTY_FUNCTION__)); |
| 5278 | } |
| 5279 | |
| 5280 | VarDecl *Def = PatternDecl->getDefinition(getASTContext()); |
| 5281 | |
| 5282 | // If we don't have a definition of the variable template, we won't perform |
| 5283 | // any instantiation. Rather, we rely on the user to instantiate this |
| 5284 | // definition (or provide a specialization for it) in another translation |
| 5285 | // unit. |
| 5286 | if (!Def && !DefinitionRequired) { |
| 5287 | if (TSK == TSK_ExplicitInstantiationDefinition) { |
| 5288 | PendingInstantiations.push_back( |
| 5289 | std::make_pair(Var, PointOfInstantiation)); |
| 5290 | } else if (TSK == TSK_ImplicitInstantiation) { |
| 5291 | // Warn about missing definition at the end of translation unit. |
| 5292 | if (AtEndOfTU && !getDiagnostics().hasErrorOccurred() && |
| 5293 | !getSourceManager().isInSystemHeader(PatternDecl->getBeginLoc())) { |
| 5294 | Diag(PointOfInstantiation, diag::warn_var_template_missing) |
| 5295 | << Var; |
| 5296 | Diag(PatternDecl->getLocation(), diag::note_forward_template_decl); |
| 5297 | if (getLangOpts().CPlusPlus11) |
| 5298 | Diag(PointOfInstantiation, diag::note_inst_declaration_hint) << Var; |
| 5299 | } |
| 5300 | return; |
| 5301 | } |
| 5302 | } |
| 5303 | |
| 5304 | // FIXME: We need to track the instantiation stack in order to know which |
| 5305 | // definitions should be visible within this instantiation. |
| 5306 | // FIXME: Produce diagnostics when Var->getInstantiatedFromStaticDataMember(). |
| 5307 | if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Var, |
| 5308 | /*InstantiatedFromMember*/false, |
| 5309 | PatternDecl, Def, TSK, |
| 5310 | /*Complain*/DefinitionRequired)) |
| 5311 | return; |
| 5312 | |
| 5313 | // C++11 [temp.explicit]p10: |
| 5314 | // Except for inline functions, const variables of literal types, variables |
| 5315 | // of reference types, [...] explicit instantiation declarations |
| 5316 | // have the effect of suppressing the implicit instantiation of the entity |
| 5317 | // to which they refer. |
| 5318 | // |
| 5319 | // FIXME: That's not exactly the same as "might be usable in constant |
| 5320 | // expressions", which only allows constexpr variables and const integral |
| 5321 | // types, not arbitrary const literal types. |
| 5322 | if (TSK == TSK_ExplicitInstantiationDeclaration && |
| 5323 | !Var->mightBeUsableInConstantExpressions(getASTContext())) |
| 5324 | return; |
| 5325 | |
| 5326 | // Make sure to pass the instantiated variable to the consumer at the end. |
| 5327 | struct PassToConsumerRAII { |
| 5328 | ASTConsumer &Consumer; |
| 5329 | VarDecl *Var; |
| 5330 | |
| 5331 | PassToConsumerRAII(ASTConsumer &Consumer, VarDecl *Var) |
| 5332 | : Consumer(Consumer), Var(Var) { } |
| 5333 | |
| 5334 | ~PassToConsumerRAII() { |
| 5335 | Consumer.HandleCXXStaticMemberVarInstantiation(Var); |
| 5336 | } |
| 5337 | } PassToConsumerRAII(Consumer, Var); |
| 5338 | |
| 5339 | // If we already have a definition, we're done. |
| 5340 | if (VarDecl *Def = Var->getDefinition()) { |
| 5341 | // We may be explicitly instantiating something we've already implicitly |
| 5342 | // instantiated. |
| 5343 | Def->setTemplateSpecializationKind(Var->getTemplateSpecializationKind(), |
| 5344 | PointOfInstantiation); |
| 5345 | return; |
| 5346 | } |
| 5347 | |
| 5348 | InstantiatingTemplate Inst(*this, PointOfInstantiation, Var); |
| 5349 | if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
| 5350 | return; |
| 5351 | PrettyDeclStackTraceEntry CrashInfo(Context, Var, SourceLocation(), |
| 5352 | "instantiating variable definition"); |
| 5353 | |
| 5354 | // If we're performing recursive template instantiation, create our own |
| 5355 | // queue of pending implicit instantiations that we will instantiate later, |
| 5356 | // while we're still within our own instantiation context. |
| 5357 | GlobalEagerInstantiationScope GlobalInstantiations(*this, |
| 5358 | /*Enabled=*/Recursive); |
| 5359 | |
| 5360 | // Enter the scope of this instantiation. We don't use |
| 5361 | // PushDeclContext because we don't have a scope. |
| 5362 | ContextRAII PreviousContext(*this, Var->getDeclContext()); |
| 5363 | LocalInstantiationScope Local(*this); |
| 5364 | |
| 5365 | LocalEagerInstantiationScope LocalInstantiations(*this); |
| 5366 | |
| 5367 | VarDecl *OldVar = Var; |
| 5368 | if (Def->isStaticDataMember() && !Def->isOutOfLine()) { |
| 5369 | // We're instantiating an inline static data member whose definition was |
| 5370 | // provided inside the class. |
| 5371 | InstantiateVariableInitializer(Var, Def, TemplateArgs); |
| 5372 | } else if (!VarSpec) { |
| 5373 | Var = cast_or_null<VarDecl>(SubstDecl(Def, Var->getDeclContext(), |
| 5374 | TemplateArgs)); |
| 5375 | } else if (Var->isStaticDataMember() && |
| 5376 | Var->getLexicalDeclContext()->isRecord()) { |
| 5377 | // We need to instantiate the definition of a static data member template, |
| 5378 | // and all we have is the in-class declaration of it. Instantiate a separate |
| 5379 | // declaration of the definition. |
| 5380 | TemplateDeclInstantiator Instantiator(*this, Var->getDeclContext(), |
| 5381 | TemplateArgs); |
| 5382 | Var = cast_or_null<VarDecl>(Instantiator.VisitVarTemplateSpecializationDecl( |
| 5383 | VarSpec->getSpecializedTemplate(), Def, VarSpec->getTemplateArgsInfo(), |
| 5384 | VarSpec->getTemplateArgs().asArray(), VarSpec)); |
| 5385 | if (Var) { |
| 5386 | llvm::PointerUnion<VarTemplateDecl *, |
| 5387 | VarTemplatePartialSpecializationDecl *> PatternPtr = |
| 5388 | VarSpec->getSpecializedTemplateOrPartial(); |
| 5389 | if (VarTemplatePartialSpecializationDecl *Partial = |
| 5390 | PatternPtr.dyn_cast<VarTemplatePartialSpecializationDecl *>()) |
| 5391 | cast<VarTemplateSpecializationDecl>(Var)->setInstantiationOf( |
| 5392 | Partial, &VarSpec->getTemplateInstantiationArgs()); |
| 5393 | |
| 5394 | // Attach the initializer. |
| 5395 | InstantiateVariableInitializer(Var, Def, TemplateArgs); |
| 5396 | } |
| 5397 | } else |
| 5398 | // Complete the existing variable's definition with an appropriately |
| 5399 | // substituted type and initializer. |
| 5400 | Var = CompleteVarTemplateSpecializationDecl(VarSpec, Def, TemplateArgs); |
| 5401 | |
| 5402 | PreviousContext.pop(); |
| 5403 | |
| 5404 | if (Var) { |
| 5405 | PassToConsumerRAII.Var = Var; |
| 5406 | Var->setTemplateSpecializationKind(OldVar->getTemplateSpecializationKind(), |
| 5407 | OldVar->getPointOfInstantiation()); |
| 5408 | } |
| 5409 | |
| 5410 | // This variable may have local implicit instantiations that need to be |
| 5411 | // instantiated within this scope. |
| 5412 | LocalInstantiations.perform(); |
| 5413 | Local.Exit(); |
| 5414 | GlobalInstantiations.perform(); |
| 5415 | } |
| 5416 | |
| 5417 | void |
| 5418 | Sema::InstantiateMemInitializers(CXXConstructorDecl *New, |
| 5419 | const CXXConstructorDecl *Tmpl, |
| 5420 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 5421 | |
| 5422 | SmallVector<CXXCtorInitializer*, 4> NewInits; |
| 5423 | bool AnyErrors = Tmpl->isInvalidDecl(); |
| 5424 | |
| 5425 | // Instantiate all the initializers. |
| 5426 | for (const auto *Init : Tmpl->inits()) { |
| 5427 | // Only instantiate written initializers, let Sema re-construct implicit |
| 5428 | // ones. |
| 5429 | if (!Init->isWritten()) |
| 5430 | continue; |
| 5431 | |
| 5432 | SourceLocation EllipsisLoc; |
| 5433 | |
| 5434 | if (Init->isPackExpansion()) { |
| 5435 | // This is a pack expansion. We should expand it now. |
| 5436 | TypeLoc BaseTL = Init->getTypeSourceInfo()->getTypeLoc(); |
| 5437 | SmallVector<UnexpandedParameterPack, 4> Unexpanded; |
| 5438 | collectUnexpandedParameterPacks(BaseTL, Unexpanded); |
| 5439 | collectUnexpandedParameterPacks(Init->getInit(), Unexpanded); |
| 5440 | bool ShouldExpand = false; |
| 5441 | bool RetainExpansion = false; |
| 5442 | Optional<unsigned> NumExpansions; |
| 5443 | if (CheckParameterPacksForExpansion(Init->getEllipsisLoc(), |
| 5444 | BaseTL.getSourceRange(), |
| 5445 | Unexpanded, |
| 5446 | TemplateArgs, ShouldExpand, |
| 5447 | RetainExpansion, |
| 5448 | NumExpansions)) { |
| 5449 | AnyErrors = true; |
| 5450 | New->setInvalidDecl(); |
| 5451 | continue; |
| 5452 | } |
| 5453 | assert(ShouldExpand && "Partial instantiation of base initializer?")((ShouldExpand && "Partial instantiation of base initializer?" ) ? static_cast<void> (0) : __assert_fail ("ShouldExpand && \"Partial instantiation of base initializer?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5453, __PRETTY_FUNCTION__)); |
| 5454 | |
| 5455 | // Loop over all of the arguments in the argument pack(s), |
| 5456 | for (unsigned I = 0; I != *NumExpansions; ++I) { |
| 5457 | Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I); |
| 5458 | |
| 5459 | // Instantiate the initializer. |
| 5460 | ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs, |
| 5461 | /*CXXDirectInit=*/true); |
| 5462 | if (TempInit.isInvalid()) { |
| 5463 | AnyErrors = true; |
| 5464 | break; |
| 5465 | } |
| 5466 | |
| 5467 | // Instantiate the base type. |
| 5468 | TypeSourceInfo *BaseTInfo = SubstType(Init->getTypeSourceInfo(), |
| 5469 | TemplateArgs, |
| 5470 | Init->getSourceLocation(), |
| 5471 | New->getDeclName()); |
| 5472 | if (!BaseTInfo) { |
| 5473 | AnyErrors = true; |
| 5474 | break; |
| 5475 | } |
| 5476 | |
| 5477 | // Build the initializer. |
| 5478 | MemInitResult NewInit = BuildBaseInitializer(BaseTInfo->getType(), |
| 5479 | BaseTInfo, TempInit.get(), |
| 5480 | New->getParent(), |
| 5481 | SourceLocation()); |
| 5482 | if (NewInit.isInvalid()) { |
| 5483 | AnyErrors = true; |
| 5484 | break; |
| 5485 | } |
| 5486 | |
| 5487 | NewInits.push_back(NewInit.get()); |
| 5488 | } |
| 5489 | |
| 5490 | continue; |
| 5491 | } |
| 5492 | |
| 5493 | // Instantiate the initializer. |
| 5494 | ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs, |
| 5495 | /*CXXDirectInit=*/true); |
| 5496 | if (TempInit.isInvalid()) { |
| 5497 | AnyErrors = true; |
| 5498 | continue; |
| 5499 | } |
| 5500 | |
| 5501 | MemInitResult NewInit; |
| 5502 | if (Init->isDelegatingInitializer() || Init->isBaseInitializer()) { |
| 5503 | TypeSourceInfo *TInfo = SubstType(Init->getTypeSourceInfo(), |
| 5504 | TemplateArgs, |
| 5505 | Init->getSourceLocation(), |
| 5506 | New->getDeclName()); |
| 5507 | if (!TInfo) { |
| 5508 | AnyErrors = true; |
| 5509 | New->setInvalidDecl(); |
| 5510 | continue; |
| 5511 | } |
| 5512 | |
| 5513 | if (Init->isBaseInitializer()) |
| 5514 | NewInit = BuildBaseInitializer(TInfo->getType(), TInfo, TempInit.get(), |
| 5515 | New->getParent(), EllipsisLoc); |
| 5516 | else |
| 5517 | NewInit = BuildDelegatingInitializer(TInfo, TempInit.get(), |
| 5518 | cast<CXXRecordDecl>(CurContext->getParent())); |
| 5519 | } else if (Init->isMemberInitializer()) { |
| 5520 | FieldDecl *Member = cast_or_null<FieldDecl>(FindInstantiatedDecl( |
| 5521 | Init->getMemberLocation(), |
| 5522 | Init->getMember(), |
| 5523 | TemplateArgs)); |
| 5524 | if (!Member) { |
| 5525 | AnyErrors = true; |
| 5526 | New->setInvalidDecl(); |
| 5527 | continue; |
| 5528 | } |
| 5529 | |
| 5530 | NewInit = BuildMemberInitializer(Member, TempInit.get(), |
| 5531 | Init->getSourceLocation()); |
| 5532 | } else if (Init->isIndirectMemberInitializer()) { |
| 5533 | IndirectFieldDecl *IndirectMember = |
| 5534 | cast_or_null<IndirectFieldDecl>(FindInstantiatedDecl( |
| 5535 | Init->getMemberLocation(), |
| 5536 | Init->getIndirectMember(), TemplateArgs)); |
| 5537 | |
| 5538 | if (!IndirectMember) { |
| 5539 | AnyErrors = true; |
| 5540 | New->setInvalidDecl(); |
| 5541 | continue; |
| 5542 | } |
| 5543 | |
| 5544 | NewInit = BuildMemberInitializer(IndirectMember, TempInit.get(), |
| 5545 | Init->getSourceLocation()); |
| 5546 | } |
| 5547 | |
| 5548 | if (NewInit.isInvalid()) { |
| 5549 | AnyErrors = true; |
| 5550 | New->setInvalidDecl(); |
| 5551 | } else { |
| 5552 | NewInits.push_back(NewInit.get()); |
| 5553 | } |
| 5554 | } |
| 5555 | |
| 5556 | // Assign all the initializers to the new constructor. |
| 5557 | ActOnMemInitializers(New, |
| 5558 | /*FIXME: ColonLoc */ |
| 5559 | SourceLocation(), |
| 5560 | NewInits, |
| 5561 | AnyErrors); |
| 5562 | } |
| 5563 | |
| 5564 | // TODO: this could be templated if the various decl types used the |
| 5565 | // same method name. |
| 5566 | static bool isInstantiationOf(ClassTemplateDecl *Pattern, |
| 5567 | ClassTemplateDecl *Instance) { |
| 5568 | Pattern = Pattern->getCanonicalDecl(); |
| 5569 | |
| 5570 | do { |
| 5571 | Instance = Instance->getCanonicalDecl(); |
| 5572 | if (Pattern == Instance) return true; |
| 5573 | Instance = Instance->getInstantiatedFromMemberTemplate(); |
| 5574 | } while (Instance); |
| 5575 | |
| 5576 | return false; |
| 5577 | } |
| 5578 | |
| 5579 | static bool isInstantiationOf(FunctionTemplateDecl *Pattern, |
| 5580 | FunctionTemplateDecl *Instance) { |
| 5581 | Pattern = Pattern->getCanonicalDecl(); |
| 5582 | |
| 5583 | do { |
| 5584 | Instance = Instance->getCanonicalDecl(); |
| 5585 | if (Pattern == Instance) return true; |
| 5586 | Instance = Instance->getInstantiatedFromMemberTemplate(); |
| 5587 | } while (Instance); |
| 5588 | |
| 5589 | return false; |
| 5590 | } |
| 5591 | |
| 5592 | static bool |
| 5593 | isInstantiationOf(ClassTemplatePartialSpecializationDecl *Pattern, |
| 5594 | ClassTemplatePartialSpecializationDecl *Instance) { |
| 5595 | Pattern |
| 5596 | = cast<ClassTemplatePartialSpecializationDecl>(Pattern->getCanonicalDecl()); |
| 5597 | do { |
| 5598 | Instance = cast<ClassTemplatePartialSpecializationDecl>( |
| 5599 | Instance->getCanonicalDecl()); |
| 5600 | if (Pattern == Instance) |
| 5601 | return true; |
| 5602 | Instance = Instance->getInstantiatedFromMember(); |
| 5603 | } while (Instance); |
| 5604 | |
| 5605 | return false; |
| 5606 | } |
| 5607 | |
| 5608 | static bool isInstantiationOf(CXXRecordDecl *Pattern, |
| 5609 | CXXRecordDecl *Instance) { |
| 5610 | Pattern = Pattern->getCanonicalDecl(); |
| 5611 | |
| 5612 | do { |
| 5613 | Instance = Instance->getCanonicalDecl(); |
| 5614 | if (Pattern == Instance) return true; |
| 5615 | Instance = Instance->getInstantiatedFromMemberClass(); |
| 5616 | } while (Instance); |
| 5617 | |
| 5618 | return false; |
| 5619 | } |
| 5620 | |
| 5621 | static bool isInstantiationOf(FunctionDecl *Pattern, |
| 5622 | FunctionDecl *Instance) { |
| 5623 | Pattern = Pattern->getCanonicalDecl(); |
| 5624 | |
| 5625 | do { |
| 5626 | Instance = Instance->getCanonicalDecl(); |
| 5627 | if (Pattern == Instance) return true; |
| 5628 | Instance = Instance->getInstantiatedFromMemberFunction(); |
| 5629 | } while (Instance); |
| 5630 | |
| 5631 | return false; |
| 5632 | } |
| 5633 | |
| 5634 | static bool isInstantiationOf(EnumDecl *Pattern, |
| 5635 | EnumDecl *Instance) { |
| 5636 | Pattern = Pattern->getCanonicalDecl(); |
| 5637 | |
| 5638 | do { |
| 5639 | Instance = Instance->getCanonicalDecl(); |
| 5640 | if (Pattern == Instance) return true; |
| 5641 | Instance = Instance->getInstantiatedFromMemberEnum(); |
| 5642 | } while (Instance); |
| 5643 | |
| 5644 | return false; |
| 5645 | } |
| 5646 | |
| 5647 | static bool isInstantiationOf(UsingShadowDecl *Pattern, |
| 5648 | UsingShadowDecl *Instance, |
| 5649 | ASTContext &C) { |
| 5650 | return declaresSameEntity(C.getInstantiatedFromUsingShadowDecl(Instance), |
| 5651 | Pattern); |
| 5652 | } |
| 5653 | |
| 5654 | static bool isInstantiationOf(UsingDecl *Pattern, UsingDecl *Instance, |
| 5655 | ASTContext &C) { |
| 5656 | return declaresSameEntity(C.getInstantiatedFromUsingDecl(Instance), Pattern); |
| 5657 | } |
| 5658 | |
| 5659 | template<typename T> |
| 5660 | static bool isInstantiationOfUnresolvedUsingDecl(T *Pattern, Decl *Other, |
| 5661 | ASTContext &Ctx) { |
| 5662 | // An unresolved using declaration can instantiate to an unresolved using |
| 5663 | // declaration, or to a using declaration or a using declaration pack. |
| 5664 | // |
| 5665 | // Multiple declarations can claim to be instantiated from an unresolved |
| 5666 | // using declaration if it's a pack expansion. We want the UsingPackDecl |
| 5667 | // in that case, not the individual UsingDecls within the pack. |
| 5668 | bool OtherIsPackExpansion; |
| 5669 | NamedDecl *OtherFrom; |
| 5670 | if (auto *OtherUUD = dyn_cast<T>(Other)) { |
| 5671 | OtherIsPackExpansion = OtherUUD->isPackExpansion(); |
| 5672 | OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUUD); |
| 5673 | } else if (auto *OtherUPD = dyn_cast<UsingPackDecl>(Other)) { |
| 5674 | OtherIsPackExpansion = true; |
| 5675 | OtherFrom = OtherUPD->getInstantiatedFromUsingDecl(); |
| 5676 | } else if (auto *OtherUD = dyn_cast<UsingDecl>(Other)) { |
| 5677 | OtherIsPackExpansion = false; |
| 5678 | OtherFrom = Ctx.getInstantiatedFromUsingDecl(OtherUD); |
| 5679 | } else { |
| 5680 | return false; |
| 5681 | } |
| 5682 | return Pattern->isPackExpansion() == OtherIsPackExpansion && |
| 5683 | declaresSameEntity(OtherFrom, Pattern); |
| 5684 | } |
| 5685 | |
| 5686 | static bool isInstantiationOfStaticDataMember(VarDecl *Pattern, |
| 5687 | VarDecl *Instance) { |
| 5688 | assert(Instance->isStaticDataMember())((Instance->isStaticDataMember()) ? static_cast<void> (0) : __assert_fail ("Instance->isStaticDataMember()", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5688, __PRETTY_FUNCTION__)); |
| 5689 | |
| 5690 | Pattern = Pattern->getCanonicalDecl(); |
| 5691 | |
| 5692 | do { |
| 5693 | Instance = Instance->getCanonicalDecl(); |
| 5694 | if (Pattern == Instance) return true; |
| 5695 | Instance = Instance->getInstantiatedFromStaticDataMember(); |
| 5696 | } while (Instance); |
| 5697 | |
| 5698 | return false; |
| 5699 | } |
| 5700 | |
| 5701 | // Other is the prospective instantiation |
| 5702 | // D is the prospective pattern |
| 5703 | static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) { |
| 5704 | if (auto *UUD = dyn_cast<UnresolvedUsingTypenameDecl>(D)) |
| 5705 | return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx); |
| 5706 | |
| 5707 | if (auto *UUD = dyn_cast<UnresolvedUsingValueDecl>(D)) |
| 5708 | return isInstantiationOfUnresolvedUsingDecl(UUD, Other, Ctx); |
| 5709 | |
| 5710 | if (D->getKind() != Other->getKind()) |
| 5711 | return false; |
| 5712 | |
| 5713 | if (auto *Record = dyn_cast<CXXRecordDecl>(Other)) |
| 5714 | return isInstantiationOf(cast<CXXRecordDecl>(D), Record); |
| 5715 | |
| 5716 | if (auto *Function = dyn_cast<FunctionDecl>(Other)) |
| 5717 | return isInstantiationOf(cast<FunctionDecl>(D), Function); |
| 5718 | |
| 5719 | if (auto *Enum = dyn_cast<EnumDecl>(Other)) |
| 5720 | return isInstantiationOf(cast<EnumDecl>(D), Enum); |
| 5721 | |
| 5722 | if (auto *Var = dyn_cast<VarDecl>(Other)) |
| 5723 | if (Var->isStaticDataMember()) |
| 5724 | return isInstantiationOfStaticDataMember(cast<VarDecl>(D), Var); |
| 5725 | |
| 5726 | if (auto *Temp = dyn_cast<ClassTemplateDecl>(Other)) |
| 5727 | return isInstantiationOf(cast<ClassTemplateDecl>(D), Temp); |
| 5728 | |
| 5729 | if (auto *Temp = dyn_cast<FunctionTemplateDecl>(Other)) |
| 5730 | return isInstantiationOf(cast<FunctionTemplateDecl>(D), Temp); |
| 5731 | |
| 5732 | if (auto *PartialSpec = |
| 5733 | dyn_cast<ClassTemplatePartialSpecializationDecl>(Other)) |
| 5734 | return isInstantiationOf(cast<ClassTemplatePartialSpecializationDecl>(D), |
| 5735 | PartialSpec); |
| 5736 | |
| 5737 | if (auto *Field = dyn_cast<FieldDecl>(Other)) { |
| 5738 | if (!Field->getDeclName()) { |
| 5739 | // This is an unnamed field. |
| 5740 | return declaresSameEntity(Ctx.getInstantiatedFromUnnamedFieldDecl(Field), |
| 5741 | cast<FieldDecl>(D)); |
| 5742 | } |
| 5743 | } |
| 5744 | |
| 5745 | if (auto *Using = dyn_cast<UsingDecl>(Other)) |
| 5746 | return isInstantiationOf(cast<UsingDecl>(D), Using, Ctx); |
| 5747 | |
| 5748 | if (auto *Shadow = dyn_cast<UsingShadowDecl>(Other)) |
| 5749 | return isInstantiationOf(cast<UsingShadowDecl>(D), Shadow, Ctx); |
| 5750 | |
| 5751 | return D->getDeclName() && |
| 5752 | D->getDeclName() == cast<NamedDecl>(Other)->getDeclName(); |
| 5753 | } |
| 5754 | |
| 5755 | template<typename ForwardIterator> |
| 5756 | static NamedDecl *findInstantiationOf(ASTContext &Ctx, |
| 5757 | NamedDecl *D, |
| 5758 | ForwardIterator first, |
| 5759 | ForwardIterator last) { |
| 5760 | for (; first != last; ++first) |
| 5761 | if (isInstantiationOf(Ctx, D, *first)) |
| 5762 | return cast<NamedDecl>(*first); |
| 5763 | |
| 5764 | return nullptr; |
| 5765 | } |
| 5766 | |
| 5767 | /// Finds the instantiation of the given declaration context |
| 5768 | /// within the current instantiation. |
| 5769 | /// |
| 5770 | /// \returns NULL if there was an error |
| 5771 | DeclContext *Sema::FindInstantiatedContext(SourceLocation Loc, DeclContext* DC, |
| 5772 | const MultiLevelTemplateArgumentList &TemplateArgs) { |
| 5773 | if (NamedDecl *D = dyn_cast<NamedDecl>(DC)) { |
| 5774 | Decl* ID = FindInstantiatedDecl(Loc, D, TemplateArgs, true); |
| 5775 | return cast_or_null<DeclContext>(ID); |
| 5776 | } else return DC; |
| 5777 | } |
| 5778 | |
| 5779 | /// Determine whether the given context is dependent on template parameters at |
| 5780 | /// level \p Level or below. |
| 5781 | /// |
| 5782 | /// Sometimes we only substitute an inner set of template arguments and leave |
| 5783 | /// the outer templates alone. In such cases, contexts dependent only on the |
| 5784 | /// outer levels are not effectively dependent. |
| 5785 | static bool isDependentContextAtLevel(DeclContext *DC, unsigned Level) { |
| 5786 | if (!DC->isDependentContext()) |
| 5787 | return false; |
| 5788 | if (!Level) |
| 5789 | return true; |
| 5790 | return cast<Decl>(DC)->getTemplateDepth() > Level; |
| 5791 | } |
| 5792 | |
| 5793 | /// Find the instantiation of the given declaration within the |
| 5794 | /// current instantiation. |
| 5795 | /// |
| 5796 | /// This routine is intended to be used when \p D is a declaration |
| 5797 | /// referenced from within a template, that needs to mapped into the |
| 5798 | /// corresponding declaration within an instantiation. For example, |
| 5799 | /// given: |
| 5800 | /// |
| 5801 | /// \code |
| 5802 | /// template<typename T> |
| 5803 | /// struct X { |
| 5804 | /// enum Kind { |
| 5805 | /// KnownValue = sizeof(T) |
| 5806 | /// }; |
| 5807 | /// |
| 5808 | /// bool getKind() const { return KnownValue; } |
| 5809 | /// }; |
| 5810 | /// |
| 5811 | /// template struct X<int>; |
| 5812 | /// \endcode |
| 5813 | /// |
| 5814 | /// In the instantiation of X<int>::getKind(), we need to map the \p |
| 5815 | /// EnumConstantDecl for \p KnownValue (which refers to |
| 5816 | /// X<T>::<Kind>::KnownValue) to its instantiation (X<int>::<Kind>::KnownValue). |
| 5817 | /// \p FindInstantiatedDecl performs this mapping from within the instantiation |
| 5818 | /// of X<int>. |
| 5819 | NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, |
| 5820 | const MultiLevelTemplateArgumentList &TemplateArgs, |
| 5821 | bool FindingInstantiatedContext) { |
| 5822 | DeclContext *ParentDC = D->getDeclContext(); |
| 5823 | // Determine whether our parent context depends on any of the tempalte |
| 5824 | // arguments we're currently substituting. |
| 5825 | bool ParentDependsOnArgs = isDependentContextAtLevel( |
| 5826 | ParentDC, TemplateArgs.getNumRetainedOuterLevels()); |
| 5827 | // FIXME: Parmeters of pointer to functions (y below) that are themselves |
| 5828 | // parameters (p below) can have their ParentDC set to the translation-unit |
| 5829 | // - thus we can not consistently check if the ParentDC of such a parameter |
| 5830 | // is Dependent or/and a FunctionOrMethod. |
| 5831 | // For e.g. this code, during Template argument deduction tries to |
| 5832 | // find an instantiated decl for (T y) when the ParentDC for y is |
| 5833 | // the translation unit. |
| 5834 | // e.g. template <class T> void Foo(auto (*p)(T y) -> decltype(y())) {} |
| 5835 | // float baz(float(*)()) { return 0.0; } |
| 5836 | // Foo(baz); |
| 5837 | // The better fix here is perhaps to ensure that a ParmVarDecl, by the time |
| 5838 | // it gets here, always has a FunctionOrMethod as its ParentDC?? |
| 5839 | // For now: |
| 5840 | // - as long as we have a ParmVarDecl whose parent is non-dependent and |
| 5841 | // whose type is not instantiation dependent, do nothing to the decl |
| 5842 | // - otherwise find its instantiated decl. |
| 5843 | if (isa<ParmVarDecl>(D) && !ParentDependsOnArgs && |
| 5844 | !cast<ParmVarDecl>(D)->getType()->isInstantiationDependentType()) |
| 5845 | return D; |
| 5846 | if (isa<ParmVarDecl>(D) || isa<NonTypeTemplateParmDecl>(D) || |
| 5847 | isa<TemplateTypeParmDecl>(D) || isa<TemplateTemplateParmDecl>(D) || |
| 5848 | (ParentDependsOnArgs && (ParentDC->isFunctionOrMethod() || |
| 5849 | isa<OMPDeclareReductionDecl>(ParentDC) || |
| 5850 | isa<OMPDeclareMapperDecl>(ParentDC))) || |
| 5851 | (isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda())) { |
| 5852 | // D is a local of some kind. Look into the map of local |
| 5853 | // declarations to their instantiations. |
| 5854 | if (CurrentInstantiationScope) { |
| 5855 | if (auto Found = CurrentInstantiationScope->findInstantiationOf(D)) { |
| 5856 | if (Decl *FD = Found->dyn_cast<Decl *>()) |
| 5857 | return cast<NamedDecl>(FD); |
| 5858 | |
| 5859 | int PackIdx = ArgumentPackSubstitutionIndex; |
| 5860 | assert(PackIdx != -1 &&((PackIdx != -1 && "found declaration pack but not pack expanding" ) ? static_cast<void> (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5861, __PRETTY_FUNCTION__)) |
| 5861 | "found declaration pack but not pack expanding")((PackIdx != -1 && "found declaration pack but not pack expanding" ) ? static_cast<void> (0) : __assert_fail ("PackIdx != -1 && \"found declaration pack but not pack expanding\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5861, __PRETTY_FUNCTION__)); |
| 5862 | typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack; |
| 5863 | return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]); |
| 5864 | } |
| 5865 | } |
| 5866 | |
| 5867 | // If we're performing a partial substitution during template argument |
| 5868 | // deduction, we may not have values for template parameters yet. They |
| 5869 | // just map to themselves. |
| 5870 | if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) || |
| 5871 | isa<TemplateTemplateParmDecl>(D)) |
| 5872 | return D; |
| 5873 | |
| 5874 | if (D->isInvalidDecl()) |
| 5875 | return nullptr; |
| 5876 | |
| 5877 | // Normally this function only searches for already instantiated declaration |
| 5878 | // however we have to make an exclusion for local types used before |
| 5879 | // definition as in the code: |
| 5880 | // |
| 5881 | // template<typename T> void f1() { |
| 5882 | // void g1(struct x1); |
| 5883 | // struct x1 {}; |
| 5884 | // } |
| 5885 | // |
| 5886 | // In this case instantiation of the type of 'g1' requires definition of |
| 5887 | // 'x1', which is defined later. Error recovery may produce an enum used |
| 5888 | // before definition. In these cases we need to instantiate relevant |
| 5889 | // declarations here. |
| 5890 | bool NeedInstantiate = false; |
| 5891 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) |
| 5892 | NeedInstantiate = RD->isLocalClass(); |
| 5893 | else if (isa<TypedefNameDecl>(D) && |
| 5894 | isa<CXXDeductionGuideDecl>(D->getDeclContext())) |
| 5895 | NeedInstantiate = true; |
| 5896 | else |
| 5897 | NeedInstantiate = isa<EnumDecl>(D); |
| 5898 | if (NeedInstantiate) { |
| 5899 | Decl *Inst = SubstDecl(D, CurContext, TemplateArgs); |
| 5900 | CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
| 5901 | return cast<TypeDecl>(Inst); |
| 5902 | } |
| 5903 | |
| 5904 | // If we didn't find the decl, then we must have a label decl that hasn't |
| 5905 | // been found yet. Lazily instantiate it and return it now. |
| 5906 | assert(isa<LabelDecl>(D))((isa<LabelDecl>(D)) ? static_cast<void> (0) : __assert_fail ("isa<LabelDecl>(D)", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5906, __PRETTY_FUNCTION__)); |
| 5907 | |
| 5908 | Decl *Inst = SubstDecl(D, CurContext, TemplateArgs); |
| 5909 | assert(Inst && "Failed to instantiate label??")((Inst && "Failed to instantiate label??") ? static_cast <void> (0) : __assert_fail ("Inst && \"Failed to instantiate label??\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5909, __PRETTY_FUNCTION__)); |
| 5910 | |
| 5911 | CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
| 5912 | return cast<LabelDecl>(Inst); |
| 5913 | } |
| 5914 | |
| 5915 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { |
| 5916 | if (!Record->isDependentContext()) |
| 5917 | return D; |
| 5918 | |
| 5919 | // Determine whether this record is the "templated" declaration describing |
| 5920 | // a class template or class template partial specialization. |
| 5921 | ClassTemplateDecl *ClassTemplate = Record->getDescribedClassTemplate(); |
| 5922 | if (ClassTemplate) |
| 5923 | ClassTemplate = ClassTemplate->getCanonicalDecl(); |
| 5924 | else if (ClassTemplatePartialSpecializationDecl *PartialSpec |
| 5925 | = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record)) |
| 5926 | ClassTemplate = PartialSpec->getSpecializedTemplate()->getCanonicalDecl(); |
| 5927 | |
| 5928 | // Walk the current context to find either the record or an instantiation of |
| 5929 | // it. |
| 5930 | DeclContext *DC = CurContext; |
| 5931 | while (!DC->isFileContext()) { |
| 5932 | // If we're performing substitution while we're inside the template |
| 5933 | // definition, we'll find our own context. We're done. |
| 5934 | if (DC->Equals(Record)) |
| 5935 | return Record; |
| 5936 | |
| 5937 | if (CXXRecordDecl *InstRecord = dyn_cast<CXXRecordDecl>(DC)) { |
| 5938 | // Check whether we're in the process of instantiating a class template |
| 5939 | // specialization of the template we're mapping. |
| 5940 | if (ClassTemplateSpecializationDecl *InstSpec |
| 5941 | = dyn_cast<ClassTemplateSpecializationDecl>(InstRecord)){ |
| 5942 | ClassTemplateDecl *SpecTemplate = InstSpec->getSpecializedTemplate(); |
| 5943 | if (ClassTemplate && isInstantiationOf(ClassTemplate, SpecTemplate)) |
| 5944 | return InstRecord; |
| 5945 | } |
| 5946 | |
| 5947 | // Check whether we're in the process of instantiating a member class. |
| 5948 | if (isInstantiationOf(Record, InstRecord)) |
| 5949 | return InstRecord; |
| 5950 | } |
| 5951 | |
| 5952 | // Move to the outer template scope. |
| 5953 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) { |
| 5954 | if (FD->getFriendObjectKind() && FD->getDeclContext()->isFileContext()){ |
| 5955 | DC = FD->getLexicalDeclContext(); |
| 5956 | continue; |
| 5957 | } |
| 5958 | // An implicit deduction guide acts as if it's within the class template |
| 5959 | // specialization described by its name and first N template params. |
| 5960 | auto *Guide = dyn_cast<CXXDeductionGuideDecl>(FD); |
| 5961 | if (Guide && Guide->isImplicit()) { |
| 5962 | TemplateDecl *TD = Guide->getDeducedTemplate(); |
| 5963 | // Convert the arguments to an "as-written" list. |
| 5964 | TemplateArgumentListInfo Args(Loc, Loc); |
| 5965 | for (TemplateArgument Arg : TemplateArgs.getInnermost().take_front( |
| 5966 | TD->getTemplateParameters()->size())) { |
| 5967 | ArrayRef<TemplateArgument> Unpacked(Arg); |
| 5968 | if (Arg.getKind() == TemplateArgument::Pack) |
| 5969 | Unpacked = Arg.pack_elements(); |
| 5970 | for (TemplateArgument UnpackedArg : Unpacked) |
| 5971 | Args.addArgument( |
| 5972 | getTrivialTemplateArgumentLoc(UnpackedArg, QualType(), Loc)); |
| 5973 | } |
| 5974 | QualType T = CheckTemplateIdType(TemplateName(TD), Loc, Args); |
| 5975 | if (T.isNull()) |
| 5976 | return nullptr; |
| 5977 | auto *SubstRecord = T->getAsCXXRecordDecl(); |
| 5978 | assert(SubstRecord && "class template id not a class type?")((SubstRecord && "class template id not a class type?" ) ? static_cast<void> (0) : __assert_fail ("SubstRecord && \"class template id not a class type?\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 5978, __PRETTY_FUNCTION__)); |
| 5979 | // Check that this template-id names the primary template and not a |
| 5980 | // partial or explicit specialization. (In the latter cases, it's |
| 5981 | // meaningless to attempt to find an instantiation of D within the |
| 5982 | // specialization.) |
| 5983 | // FIXME: The standard doesn't say what should happen here. |
| 5984 | if (FindingInstantiatedContext && |
| 5985 | usesPartialOrExplicitSpecialization( |
| 5986 | Loc, cast<ClassTemplateSpecializationDecl>(SubstRecord))) { |
| 5987 | Diag(Loc, diag::err_specialization_not_primary_template) |
| 5988 | << T << (SubstRecord->getTemplateSpecializationKind() == |
| 5989 | TSK_ExplicitSpecialization); |
| 5990 | return nullptr; |
| 5991 | } |
| 5992 | DC = SubstRecord; |
| 5993 | continue; |
| 5994 | } |
| 5995 | } |
| 5996 | |
| 5997 | DC = DC->getParent(); |
| 5998 | } |
| 5999 | |
| 6000 | // Fall through to deal with other dependent record types (e.g., |
| 6001 | // anonymous unions in class templates). |
| 6002 | } |
| 6003 | |
| 6004 | if (!ParentDependsOnArgs) |
| 6005 | return D; |
| 6006 | |
| 6007 | ParentDC = FindInstantiatedContext(Loc, ParentDC, TemplateArgs); |
| 6008 | if (!ParentDC) |
| 6009 | return nullptr; |
| 6010 | |
| 6011 | if (ParentDC != D->getDeclContext()) { |
| 6012 | // We performed some kind of instantiation in the parent context, |
| 6013 | // so now we need to look into the instantiated parent context to |
| 6014 | // find the instantiation of the declaration D. |
| 6015 | |
| 6016 | // If our context used to be dependent, we may need to instantiate |
| 6017 | // it before performing lookup into that context. |
| 6018 | bool IsBeingInstantiated = false; |
| 6019 | if (CXXRecordDecl *Spec = dyn_cast<CXXRecordDecl>(ParentDC)) { |
| 6020 | if (!Spec->isDependentContext()) { |
| 6021 | QualType T = Context.getTypeDeclType(Spec); |
| 6022 | const RecordType *Tag = T->getAs<RecordType>(); |
| 6023 | assert(Tag && "type of non-dependent record is not a RecordType")((Tag && "type of non-dependent record is not a RecordType" ) ? static_cast<void> (0) : __assert_fail ("Tag && \"type of non-dependent record is not a RecordType\"" , "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp" , 6023, __PRETTY_FUNCTION__)); |
| 6024 | if (Tag->isBeingDefined()) |
| 6025 | IsBeingInstantiated = true; |
| 6026 | if (!Tag->isBeingDefined() && |
| 6027 | RequireCompleteType(Loc, T, diag::err_incomplete_type)) |
| 6028 | return nullptr; |
| 6029 | |
| 6030 | ParentDC = Tag->getDecl(); |
| 6031 | } |
| 6032 | } |
| 6033 | |
| 6034 | NamedDecl *Result = nullptr; |
| 6035 | // FIXME: If the name is a dependent name, this lookup won't necessarily |
| 6036 | // find it. Does that ever matter? |
| 6037 | if (auto Name = D->getDeclName()) { |
| 6038 | DeclarationNameInfo NameInfo(Name, D->getLocation()); |
| 6039 | DeclarationNameInfo NewNameInfo = |
| 6040 | SubstDeclarationNameInfo(NameInfo, TemplateArgs); |
| 6041 | Name = NewNameInfo.getName(); |
| 6042 | if (!Name) |
| 6043 | return nullptr; |
| 6044 | DeclContext::lookup_result Found = ParentDC->lookup(Name); |
| 6045 | |
| 6046 | Result = findInstantiationOf(Context, D, Found.begin(), Found.end()); |
| 6047 | } else { |
| 6048 | // Since we don't have a name for the entity we're looking for, |
| 6049 | // our only option is to walk through all of the declarations to |
| 6050 | // find that name. This will occur in a few cases: |
| 6051 | // |
| 6052 | // - anonymous struct/union within a template |
| 6053 | // - unnamed class/struct/union/enum within a template |
| 6054 | // |
| 6055 | // FIXME: Find a better way to find these instantiations! |
| 6056 | Result = findInstantiationOf(Context, D, |
| 6057 | ParentDC->decls_begin(), |
| 6058 | ParentDC->decls_end()); |
| 6059 | } |
| 6060 | |
| 6061 | if (!Result) { |