| File: | tools/clang/lib/Sema/SemaCoroutine.cpp |
| Warning: | line 86, column 20 Called C++ object pointer is null |
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| 1 | //===-- SemaCoroutine.cpp - Semantic Analysis for Coroutines --------------===// | ||||
| 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 | // | ||||
| 9 | // This file implements semantic analysis for C++ Coroutines. | ||||
| 10 | // | ||||
| 11 | // This file contains references to sections of the Coroutines TS, which | ||||
| 12 | // can be found at http://wg21.link/coroutines. | ||||
| 13 | // | ||||
| 14 | //===----------------------------------------------------------------------===// | ||||
| 15 | |||||
| 16 | #include "CoroutineStmtBuilder.h" | ||||
| 17 | #include "clang/AST/ASTLambda.h" | ||||
| 18 | #include "clang/AST/Decl.h" | ||||
| 19 | #include "clang/AST/ExprCXX.h" | ||||
| 20 | #include "clang/AST/StmtCXX.h" | ||||
| 21 | #include "clang/Lex/Preprocessor.h" | ||||
| 22 | #include "clang/Sema/Initialization.h" | ||||
| 23 | #include "clang/Sema/Overload.h" | ||||
| 24 | #include "clang/Sema/ScopeInfo.h" | ||||
| 25 | #include "clang/Sema/SemaInternal.h" | ||||
| 26 | |||||
| 27 | using namespace clang; | ||||
| 28 | using namespace sema; | ||||
| 29 | |||||
| 30 | static LookupResult lookupMember(Sema &S, const char *Name, CXXRecordDecl *RD, | ||||
| 31 | SourceLocation Loc, bool &Res) { | ||||
| 32 | DeclarationName DN = S.PP.getIdentifierInfo(Name); | ||||
| 33 | LookupResult LR(S, DN, Loc, Sema::LookupMemberName); | ||||
| 34 | // Suppress diagnostics when a private member is selected. The same warnings | ||||
| 35 | // will be produced again when building the call. | ||||
| 36 | LR.suppressDiagnostics(); | ||||
| 37 | Res = S.LookupQualifiedName(LR, RD); | ||||
| 38 | return LR; | ||||
| 39 | } | ||||
| 40 | |||||
| 41 | static bool lookupMember(Sema &S, const char *Name, CXXRecordDecl *RD, | ||||
| 42 | SourceLocation Loc) { | ||||
| 43 | bool Res; | ||||
| 44 | lookupMember(S, Name, RD, Loc, Res); | ||||
| 45 | return Res; | ||||
| 46 | } | ||||
| 47 | |||||
| 48 | /// Look up the std::coroutine_traits<...>::promise_type for the given | ||||
| 49 | /// function type. | ||||
| 50 | static QualType lookupPromiseType(Sema &S, const FunctionDecl *FD, | ||||
| 51 | SourceLocation KwLoc) { | ||||
| 52 | const FunctionProtoType *FnType = FD->getType()->castAs<FunctionProtoType>(); | ||||
| 53 | const SourceLocation FuncLoc = FD->getLocation(); | ||||
| 54 | // FIXME: Cache std::coroutine_traits once we've found it. | ||||
| 55 | NamespaceDecl *StdExp = S.lookupStdExperimentalNamespace(); | ||||
| 56 | if (!StdExp) { | ||||
| 57 | S.Diag(KwLoc, diag::err_implied_coroutine_type_not_found) | ||||
| 58 | << "std::experimental::coroutine_traits"; | ||||
| 59 | return QualType(); | ||||
| 60 | } | ||||
| 61 | |||||
| 62 | ClassTemplateDecl *CoroTraits = S.lookupCoroutineTraits(KwLoc, FuncLoc); | ||||
| 63 | if (!CoroTraits) { | ||||
| 64 | return QualType(); | ||||
| 65 | } | ||||
| 66 | |||||
| 67 | // Form template argument list for coroutine_traits<R, P1, P2, ...> according | ||||
| 68 | // to [dcl.fct.def.coroutine]3 | ||||
| 69 | TemplateArgumentListInfo Args(KwLoc, KwLoc); | ||||
| 70 | auto AddArg = [&](QualType T) { | ||||
| 71 | Args.addArgument(TemplateArgumentLoc( | ||||
| 72 | TemplateArgument(T), S.Context.getTrivialTypeSourceInfo(T, KwLoc))); | ||||
| 73 | }; | ||||
| 74 | AddArg(FnType->getReturnType()); | ||||
| 75 | // If the function is a non-static member function, add the type | ||||
| 76 | // of the implicit object parameter before the formal parameters. | ||||
| 77 | if (auto *MD
| ||||
| 78 | if (MD->isInstance()) { | ||||
| 79 | // [over.match.funcs]4 | ||||
| 80 | // For non-static member functions, the type of the implicit object | ||||
| 81 | // parameter is | ||||
| 82 | // -- "lvalue reference to cv X" for functions declared without a | ||||
| 83 | // ref-qualifier or with the & ref-qualifier | ||||
| 84 | // -- "rvalue reference to cv X" for functions declared with the && | ||||
| 85 | // ref-qualifier | ||||
| 86 | QualType T = MD->getThisType()->getAs<PointerType>()->getPointeeType(); | ||||
| |||||
| 87 | T = FnType->getRefQualifier() == RQ_RValue | ||||
| 88 | ? S.Context.getRValueReferenceType(T) | ||||
| 89 | : S.Context.getLValueReferenceType(T, /*SpelledAsLValue*/ true); | ||||
| 90 | AddArg(T); | ||||
| 91 | } | ||||
| 92 | } | ||||
| 93 | for (QualType T : FnType->getParamTypes()) | ||||
| 94 | AddArg(T); | ||||
| 95 | |||||
| 96 | // Build the template-id. | ||||
| 97 | QualType CoroTrait = | ||||
| 98 | S.CheckTemplateIdType(TemplateName(CoroTraits), KwLoc, Args); | ||||
| 99 | if (CoroTrait.isNull()) | ||||
| 100 | return QualType(); | ||||
| 101 | if (S.RequireCompleteType(KwLoc, CoroTrait, | ||||
| 102 | diag::err_coroutine_type_missing_specialization)) | ||||
| 103 | return QualType(); | ||||
| 104 | |||||
| 105 | auto *RD = CoroTrait->getAsCXXRecordDecl(); | ||||
| 106 | assert(RD && "specialization of class template is not a class?")((RD && "specialization of class template is not a class?" ) ? static_cast<void> (0) : __assert_fail ("RD && \"specialization of class template is not a class?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 106, __PRETTY_FUNCTION__)); | ||||
| 107 | |||||
| 108 | // Look up the ::promise_type member. | ||||
| 109 | LookupResult R(S, &S.PP.getIdentifierTable().get("promise_type"), KwLoc, | ||||
| 110 | Sema::LookupOrdinaryName); | ||||
| 111 | S.LookupQualifiedName(R, RD); | ||||
| 112 | auto *Promise = R.getAsSingle<TypeDecl>(); | ||||
| 113 | if (!Promise) { | ||||
| 114 | S.Diag(FuncLoc, | ||||
| 115 | diag::err_implied_std_coroutine_traits_promise_type_not_found) | ||||
| 116 | << RD; | ||||
| 117 | return QualType(); | ||||
| 118 | } | ||||
| 119 | // The promise type is required to be a class type. | ||||
| 120 | QualType PromiseType = S.Context.getTypeDeclType(Promise); | ||||
| 121 | |||||
| 122 | auto buildElaboratedType = [&]() { | ||||
| 123 | auto *NNS = NestedNameSpecifier::Create(S.Context, nullptr, StdExp); | ||||
| 124 | NNS = NestedNameSpecifier::Create(S.Context, NNS, false, | ||||
| 125 | CoroTrait.getTypePtr()); | ||||
| 126 | return S.Context.getElaboratedType(ETK_None, NNS, PromiseType); | ||||
| 127 | }; | ||||
| 128 | |||||
| 129 | if (!PromiseType->getAsCXXRecordDecl()) { | ||||
| 130 | S.Diag(FuncLoc, | ||||
| 131 | diag::err_implied_std_coroutine_traits_promise_type_not_class) | ||||
| 132 | << buildElaboratedType(); | ||||
| 133 | return QualType(); | ||||
| 134 | } | ||||
| 135 | if (S.RequireCompleteType(FuncLoc, buildElaboratedType(), | ||||
| 136 | diag::err_coroutine_promise_type_incomplete)) | ||||
| 137 | return QualType(); | ||||
| 138 | |||||
| 139 | return PromiseType; | ||||
| 140 | } | ||||
| 141 | |||||
| 142 | /// Look up the std::experimental::coroutine_handle<PromiseType>. | ||||
| 143 | static QualType lookupCoroutineHandleType(Sema &S, QualType PromiseType, | ||||
| 144 | SourceLocation Loc) { | ||||
| 145 | if (PromiseType.isNull()) | ||||
| 146 | return QualType(); | ||||
| 147 | |||||
| 148 | NamespaceDecl *StdExp = S.lookupStdExperimentalNamespace(); | ||||
| 149 | assert(StdExp && "Should already be diagnosed")((StdExp && "Should already be diagnosed") ? static_cast <void> (0) : __assert_fail ("StdExp && \"Should already be diagnosed\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 149, __PRETTY_FUNCTION__)); | ||||
| 150 | |||||
| 151 | LookupResult Result(S, &S.PP.getIdentifierTable().get("coroutine_handle"), | ||||
| 152 | Loc, Sema::LookupOrdinaryName); | ||||
| 153 | if (!S.LookupQualifiedName(Result, StdExp)) { | ||||
| 154 | S.Diag(Loc, diag::err_implied_coroutine_type_not_found) | ||||
| 155 | << "std::experimental::coroutine_handle"; | ||||
| 156 | return QualType(); | ||||
| 157 | } | ||||
| 158 | |||||
| 159 | ClassTemplateDecl *CoroHandle = Result.getAsSingle<ClassTemplateDecl>(); | ||||
| 160 | if (!CoroHandle) { | ||||
| 161 | Result.suppressDiagnostics(); | ||||
| 162 | // We found something weird. Complain about the first thing we found. | ||||
| 163 | NamedDecl *Found = *Result.begin(); | ||||
| 164 | S.Diag(Found->getLocation(), diag::err_malformed_std_coroutine_handle); | ||||
| 165 | return QualType(); | ||||
| 166 | } | ||||
| 167 | |||||
| 168 | // Form template argument list for coroutine_handle<Promise>. | ||||
| 169 | TemplateArgumentListInfo Args(Loc, Loc); | ||||
| 170 | Args.addArgument(TemplateArgumentLoc( | ||||
| 171 | TemplateArgument(PromiseType), | ||||
| 172 | S.Context.getTrivialTypeSourceInfo(PromiseType, Loc))); | ||||
| 173 | |||||
| 174 | // Build the template-id. | ||||
| 175 | QualType CoroHandleType = | ||||
| 176 | S.CheckTemplateIdType(TemplateName(CoroHandle), Loc, Args); | ||||
| 177 | if (CoroHandleType.isNull()) | ||||
| 178 | return QualType(); | ||||
| 179 | if (S.RequireCompleteType(Loc, CoroHandleType, | ||||
| 180 | diag::err_coroutine_type_missing_specialization)) | ||||
| 181 | return QualType(); | ||||
| 182 | |||||
| 183 | return CoroHandleType; | ||||
| 184 | } | ||||
| 185 | |||||
| 186 | static bool isValidCoroutineContext(Sema &S, SourceLocation Loc, | ||||
| 187 | StringRef Keyword) { | ||||
| 188 | // [expr.await]p2 dictates that 'co_await' and 'co_yield' must be used within | ||||
| 189 | // a function body. | ||||
| 190 | // FIXME: This also covers [expr.await]p2: "An await-expression shall not | ||||
| 191 | // appear in a default argument." But the diagnostic QoI here could be | ||||
| 192 | // improved to inform the user that default arguments specifically are not | ||||
| 193 | // allowed. | ||||
| 194 | auto *FD = dyn_cast<FunctionDecl>(S.CurContext); | ||||
| 195 | if (!FD) { | ||||
| 196 | S.Diag(Loc, isa<ObjCMethodDecl>(S.CurContext) | ||||
| 197 | ? diag::err_coroutine_objc_method | ||||
| 198 | : diag::err_coroutine_outside_function) << Keyword; | ||||
| 199 | return false; | ||||
| 200 | } | ||||
| 201 | |||||
| 202 | // An enumeration for mapping the diagnostic type to the correct diagnostic | ||||
| 203 | // selection index. | ||||
| 204 | enum InvalidFuncDiag { | ||||
| 205 | DiagCtor = 0, | ||||
| 206 | DiagDtor, | ||||
| 207 | DiagMain, | ||||
| 208 | DiagConstexpr, | ||||
| 209 | DiagAutoRet, | ||||
| 210 | DiagVarargs, | ||||
| 211 | DiagConsteval, | ||||
| 212 | }; | ||||
| 213 | bool Diagnosed = false; | ||||
| 214 | auto DiagInvalid = [&](InvalidFuncDiag ID) { | ||||
| 215 | S.Diag(Loc, diag::err_coroutine_invalid_func_context) << ID << Keyword; | ||||
| 216 | Diagnosed = true; | ||||
| 217 | return false; | ||||
| 218 | }; | ||||
| 219 | |||||
| 220 | // Diagnose when a constructor, destructor | ||||
| 221 | // or the function 'main' are declared as a coroutine. | ||||
| 222 | auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||
| 223 | // [class.ctor]p11: "A constructor shall not be a coroutine." | ||||
| 224 | if (MD && isa<CXXConstructorDecl>(MD)) | ||||
| 225 | return DiagInvalid(DiagCtor); | ||||
| 226 | // [class.dtor]p17: "A destructor shall not be a coroutine." | ||||
| 227 | else if (MD && isa<CXXDestructorDecl>(MD)) | ||||
| 228 | return DiagInvalid(DiagDtor); | ||||
| 229 | // [basic.start.main]p3: "The function main shall not be a coroutine." | ||||
| 230 | else if (FD->isMain()) | ||||
| 231 | return DiagInvalid(DiagMain); | ||||
| 232 | |||||
| 233 | // Emit a diagnostics for each of the following conditions which is not met. | ||||
| 234 | // [expr.const]p2: "An expression e is a core constant expression unless the | ||||
| 235 | // evaluation of e [...] would evaluate one of the following expressions: | ||||
| 236 | // [...] an await-expression [...] a yield-expression." | ||||
| 237 | if (FD->isConstexpr()) | ||||
| 238 | DiagInvalid(FD->isConsteval() ? DiagConsteval : DiagConstexpr); | ||||
| 239 | // [dcl.spec.auto]p15: "A function declared with a return type that uses a | ||||
| 240 | // placeholder type shall not be a coroutine." | ||||
| 241 | if (FD->getReturnType()->isUndeducedType()) | ||||
| 242 | DiagInvalid(DiagAutoRet); | ||||
| 243 | // [dcl.fct.def.coroutine]p1: "The parameter-declaration-clause of the | ||||
| 244 | // coroutine shall not terminate with an ellipsis that is not part of a | ||||
| 245 | // parameter-declaration." | ||||
| 246 | if (FD->isVariadic()) | ||||
| 247 | DiagInvalid(DiagVarargs); | ||||
| 248 | |||||
| 249 | return !Diagnosed; | ||||
| 250 | } | ||||
| 251 | |||||
| 252 | static ExprResult buildOperatorCoawaitLookupExpr(Sema &SemaRef, Scope *S, | ||||
| 253 | SourceLocation Loc) { | ||||
| 254 | DeclarationName OpName = | ||||
| 255 | SemaRef.Context.DeclarationNames.getCXXOperatorName(OO_Coawait); | ||||
| 256 | LookupResult Operators(SemaRef, OpName, SourceLocation(), | ||||
| 257 | Sema::LookupOperatorName); | ||||
| 258 | SemaRef.LookupName(Operators, S); | ||||
| 259 | |||||
| 260 | assert(!Operators.isAmbiguous() && "Operator lookup cannot be ambiguous")((!Operators.isAmbiguous() && "Operator lookup cannot be ambiguous" ) ? static_cast<void> (0) : __assert_fail ("!Operators.isAmbiguous() && \"Operator lookup cannot be ambiguous\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 260, __PRETTY_FUNCTION__)); | ||||
| 261 | const auto &Functions = Operators.asUnresolvedSet(); | ||||
| 262 | bool IsOverloaded = | ||||
| 263 | Functions.size() > 1 || | ||||
| 264 | (Functions.size() == 1 && isa<FunctionTemplateDecl>(*Functions.begin())); | ||||
| 265 | Expr *CoawaitOp = UnresolvedLookupExpr::Create( | ||||
| 266 | SemaRef.Context, /*NamingClass*/ nullptr, NestedNameSpecifierLoc(), | ||||
| 267 | DeclarationNameInfo(OpName, Loc), /*RequiresADL*/ true, IsOverloaded, | ||||
| 268 | Functions.begin(), Functions.end()); | ||||
| 269 | assert(CoawaitOp)((CoawaitOp) ? static_cast<void> (0) : __assert_fail ("CoawaitOp" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 269, __PRETTY_FUNCTION__)); | ||||
| 270 | return CoawaitOp; | ||||
| 271 | } | ||||
| 272 | |||||
| 273 | /// Build a call to 'operator co_await' if there is a suitable operator for | ||||
| 274 | /// the given expression. | ||||
| 275 | static ExprResult buildOperatorCoawaitCall(Sema &SemaRef, SourceLocation Loc, | ||||
| 276 | Expr *E, | ||||
| 277 | UnresolvedLookupExpr *Lookup) { | ||||
| 278 | UnresolvedSet<16> Functions; | ||||
| 279 | Functions.append(Lookup->decls_begin(), Lookup->decls_end()); | ||||
| 280 | return SemaRef.CreateOverloadedUnaryOp(Loc, UO_Coawait, Functions, E); | ||||
| 281 | } | ||||
| 282 | |||||
| 283 | static ExprResult buildOperatorCoawaitCall(Sema &SemaRef, Scope *S, | ||||
| 284 | SourceLocation Loc, Expr *E) { | ||||
| 285 | ExprResult R = buildOperatorCoawaitLookupExpr(SemaRef, S, Loc); | ||||
| 286 | if (R.isInvalid()) | ||||
| 287 | return ExprError(); | ||||
| 288 | return buildOperatorCoawaitCall(SemaRef, Loc, E, | ||||
| 289 | cast<UnresolvedLookupExpr>(R.get())); | ||||
| 290 | } | ||||
| 291 | |||||
| 292 | static Expr *buildBuiltinCall(Sema &S, SourceLocation Loc, Builtin::ID Id, | ||||
| 293 | MultiExprArg CallArgs) { | ||||
| 294 | StringRef Name = S.Context.BuiltinInfo.getName(Id); | ||||
| 295 | LookupResult R(S, &S.Context.Idents.get(Name), Loc, Sema::LookupOrdinaryName); | ||||
| 296 | S.LookupName(R, S.TUScope, /*AllowBuiltinCreation=*/true); | ||||
| 297 | |||||
| 298 | auto *BuiltInDecl = R.getAsSingle<FunctionDecl>(); | ||||
| 299 | assert(BuiltInDecl && "failed to find builtin declaration")((BuiltInDecl && "failed to find builtin declaration" ) ? static_cast<void> (0) : __assert_fail ("BuiltInDecl && \"failed to find builtin declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 299, __PRETTY_FUNCTION__)); | ||||
| 300 | |||||
| 301 | ExprResult DeclRef = | ||||
| 302 | S.BuildDeclRefExpr(BuiltInDecl, BuiltInDecl->getType(), VK_LValue, Loc); | ||||
| 303 | assert(DeclRef.isUsable() && "Builtin reference cannot fail")((DeclRef.isUsable() && "Builtin reference cannot fail" ) ? static_cast<void> (0) : __assert_fail ("DeclRef.isUsable() && \"Builtin reference cannot fail\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 303, __PRETTY_FUNCTION__)); | ||||
| 304 | |||||
| 305 | ExprResult Call = | ||||
| 306 | S.BuildCallExpr(/*Scope=*/nullptr, DeclRef.get(), Loc, CallArgs, Loc); | ||||
| 307 | |||||
| 308 | assert(!Call.isInvalid() && "Call to builtin cannot fail!")((!Call.isInvalid() && "Call to builtin cannot fail!" ) ? static_cast<void> (0) : __assert_fail ("!Call.isInvalid() && \"Call to builtin cannot fail!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 308, __PRETTY_FUNCTION__)); | ||||
| 309 | return Call.get(); | ||||
| 310 | } | ||||
| 311 | |||||
| 312 | static ExprResult buildCoroutineHandle(Sema &S, QualType PromiseType, | ||||
| 313 | SourceLocation Loc) { | ||||
| 314 | QualType CoroHandleType = lookupCoroutineHandleType(S, PromiseType, Loc); | ||||
| 315 | if (CoroHandleType.isNull()) | ||||
| 316 | return ExprError(); | ||||
| 317 | |||||
| 318 | DeclContext *LookupCtx = S.computeDeclContext(CoroHandleType); | ||||
| 319 | LookupResult Found(S, &S.PP.getIdentifierTable().get("from_address"), Loc, | ||||
| 320 | Sema::LookupOrdinaryName); | ||||
| 321 | if (!S.LookupQualifiedName(Found, LookupCtx)) { | ||||
| 322 | S.Diag(Loc, diag::err_coroutine_handle_missing_member) | ||||
| 323 | << "from_address"; | ||||
| 324 | return ExprError(); | ||||
| 325 | } | ||||
| 326 | |||||
| 327 | Expr *FramePtr = | ||||
| 328 | buildBuiltinCall(S, Loc, Builtin::BI__builtin_coro_frame, {}); | ||||
| 329 | |||||
| 330 | CXXScopeSpec SS; | ||||
| 331 | ExprResult FromAddr = | ||||
| 332 | S.BuildDeclarationNameExpr(SS, Found, /*NeedsADL=*/false); | ||||
| 333 | if (FromAddr.isInvalid()) | ||||
| 334 | return ExprError(); | ||||
| 335 | |||||
| 336 | return S.BuildCallExpr(nullptr, FromAddr.get(), Loc, FramePtr, Loc); | ||||
| 337 | } | ||||
| 338 | |||||
| 339 | struct ReadySuspendResumeResult { | ||||
| 340 | enum AwaitCallType { ACT_Ready, ACT_Suspend, ACT_Resume }; | ||||
| 341 | Expr *Results[3]; | ||||
| 342 | OpaqueValueExpr *OpaqueValue; | ||||
| 343 | bool IsInvalid; | ||||
| 344 | }; | ||||
| 345 | |||||
| 346 | static ExprResult buildMemberCall(Sema &S, Expr *Base, SourceLocation Loc, | ||||
| 347 | StringRef Name, MultiExprArg Args) { | ||||
| 348 | DeclarationNameInfo NameInfo(&S.PP.getIdentifierTable().get(Name), Loc); | ||||
| 349 | |||||
| 350 | // FIXME: Fix BuildMemberReferenceExpr to take a const CXXScopeSpec&. | ||||
| 351 | CXXScopeSpec SS; | ||||
| 352 | ExprResult Result = S.BuildMemberReferenceExpr( | ||||
| 353 | Base, Base->getType(), Loc, /*IsPtr=*/false, SS, | ||||
| 354 | SourceLocation(), nullptr, NameInfo, /*TemplateArgs=*/nullptr, | ||||
| 355 | /*Scope=*/nullptr); | ||||
| 356 | if (Result.isInvalid()) | ||||
| 357 | return ExprError(); | ||||
| 358 | |||||
| 359 | // We meant exactly what we asked for. No need for typo correction. | ||||
| 360 | if (auto *TE = dyn_cast<TypoExpr>(Result.get())) { | ||||
| 361 | S.clearDelayedTypo(TE); | ||||
| 362 | S.Diag(Loc, diag::err_no_member) | ||||
| 363 | << NameInfo.getName() << Base->getType()->getAsCXXRecordDecl() | ||||
| 364 | << Base->getSourceRange(); | ||||
| 365 | return ExprError(); | ||||
| 366 | } | ||||
| 367 | |||||
| 368 | return S.BuildCallExpr(nullptr, Result.get(), Loc, Args, Loc, nullptr); | ||||
| 369 | } | ||||
| 370 | |||||
| 371 | // See if return type is coroutine-handle and if so, invoke builtin coro-resume | ||||
| 372 | // on its address. This is to enable experimental support for coroutine-handle | ||||
| 373 | // returning await_suspend that results in a guaranteed tail call to the target | ||||
| 374 | // coroutine. | ||||
| 375 | static Expr *maybeTailCall(Sema &S, QualType RetType, Expr *E, | ||||
| 376 | SourceLocation Loc) { | ||||
| 377 | if (RetType->isReferenceType()) | ||||
| 378 | return nullptr; | ||||
| 379 | Type const *T = RetType.getTypePtr(); | ||||
| 380 | if (!T->isClassType() && !T->isStructureType()) | ||||
| 381 | return nullptr; | ||||
| 382 | |||||
| 383 | // FIXME: Add convertability check to coroutine_handle<>. Possibly via | ||||
| 384 | // EvaluateBinaryTypeTrait(BTT_IsConvertible, ...) which is at the moment | ||||
| 385 | // a private function in SemaExprCXX.cpp | ||||
| 386 | |||||
| 387 | ExprResult AddressExpr = buildMemberCall(S, E, Loc, "address", None); | ||||
| 388 | if (AddressExpr.isInvalid()) | ||||
| 389 | return nullptr; | ||||
| 390 | |||||
| 391 | Expr *JustAddress = AddressExpr.get(); | ||||
| 392 | // FIXME: Check that the type of AddressExpr is void* | ||||
| 393 | return buildBuiltinCall(S, Loc, Builtin::BI__builtin_coro_resume, | ||||
| 394 | JustAddress); | ||||
| 395 | } | ||||
| 396 | |||||
| 397 | /// Build calls to await_ready, await_suspend, and await_resume for a co_await | ||||
| 398 | /// expression. | ||||
| 399 | static ReadySuspendResumeResult buildCoawaitCalls(Sema &S, VarDecl *CoroPromise, | ||||
| 400 | SourceLocation Loc, Expr *E) { | ||||
| 401 | OpaqueValueExpr *Operand = new (S.Context) | ||||
| 402 | OpaqueValueExpr(Loc, E->getType(), VK_LValue, E->getObjectKind(), E); | ||||
| 403 | |||||
| 404 | // Assume invalid until we see otherwise. | ||||
| 405 | ReadySuspendResumeResult Calls = {{}, Operand, /*IsInvalid=*/true}; | ||||
| 406 | |||||
| 407 | ExprResult CoroHandleRes = buildCoroutineHandle(S, CoroPromise->getType(), Loc); | ||||
| 408 | if (CoroHandleRes.isInvalid()) | ||||
| 409 | return Calls; | ||||
| 410 | Expr *CoroHandle = CoroHandleRes.get(); | ||||
| 411 | |||||
| 412 | const StringRef Funcs[] = {"await_ready", "await_suspend", "await_resume"}; | ||||
| 413 | MultiExprArg Args[] = {None, CoroHandle, None}; | ||||
| 414 | for (size_t I = 0, N = llvm::array_lengthof(Funcs); I != N; ++I) { | ||||
| 415 | ExprResult Result = buildMemberCall(S, Operand, Loc, Funcs[I], Args[I]); | ||||
| 416 | if (Result.isInvalid()) | ||||
| 417 | return Calls; | ||||
| 418 | Calls.Results[I] = Result.get(); | ||||
| 419 | } | ||||
| 420 | |||||
| 421 | // Assume the calls are valid; all further checking should make them invalid. | ||||
| 422 | Calls.IsInvalid = false; | ||||
| 423 | |||||
| 424 | using ACT = ReadySuspendResumeResult::AwaitCallType; | ||||
| 425 | CallExpr *AwaitReady = cast<CallExpr>(Calls.Results[ACT::ACT_Ready]); | ||||
| 426 | if (!AwaitReady->getType()->isDependentType()) { | ||||
| 427 | // [expr.await]p3 [...] | ||||
| 428 | // — await-ready is the expression e.await_ready(), contextually converted | ||||
| 429 | // to bool. | ||||
| 430 | ExprResult Conv = S.PerformContextuallyConvertToBool(AwaitReady); | ||||
| 431 | if (Conv.isInvalid()) { | ||||
| 432 | S.Diag(AwaitReady->getDirectCallee()->getBeginLoc(), | ||||
| 433 | diag::note_await_ready_no_bool_conversion); | ||||
| 434 | S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required) | ||||
| 435 | << AwaitReady->getDirectCallee() << E->getSourceRange(); | ||||
| 436 | Calls.IsInvalid = true; | ||||
| 437 | } | ||||
| 438 | Calls.Results[ACT::ACT_Ready] = Conv.get(); | ||||
| 439 | } | ||||
| 440 | CallExpr *AwaitSuspend = cast<CallExpr>(Calls.Results[ACT::ACT_Suspend]); | ||||
| 441 | if (!AwaitSuspend->getType()->isDependentType()) { | ||||
| 442 | // [expr.await]p3 [...] | ||||
| 443 | // - await-suspend is the expression e.await_suspend(h), which shall be | ||||
| 444 | // a prvalue of type void or bool. | ||||
| 445 | QualType RetType = AwaitSuspend->getCallReturnType(S.Context); | ||||
| 446 | |||||
| 447 | // Experimental support for coroutine_handle returning await_suspend. | ||||
| 448 | if (Expr *TailCallSuspend = maybeTailCall(S, RetType, AwaitSuspend, Loc)) | ||||
| 449 | Calls.Results[ACT::ACT_Suspend] = TailCallSuspend; | ||||
| 450 | else { | ||||
| 451 | // non-class prvalues always have cv-unqualified types | ||||
| 452 | if (RetType->isReferenceType() || | ||||
| 453 | (!RetType->isBooleanType() && !RetType->isVoidType())) { | ||||
| 454 | S.Diag(AwaitSuspend->getCalleeDecl()->getLocation(), | ||||
| 455 | diag::err_await_suspend_invalid_return_type) | ||||
| 456 | << RetType; | ||||
| 457 | S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required) | ||||
| 458 | << AwaitSuspend->getDirectCallee(); | ||||
| 459 | Calls.IsInvalid = true; | ||||
| 460 | } | ||||
| 461 | } | ||||
| 462 | } | ||||
| 463 | |||||
| 464 | return Calls; | ||||
| 465 | } | ||||
| 466 | |||||
| 467 | static ExprResult buildPromiseCall(Sema &S, VarDecl *Promise, | ||||
| 468 | SourceLocation Loc, StringRef Name, | ||||
| 469 | MultiExprArg Args) { | ||||
| 470 | |||||
| 471 | // Form a reference to the promise. | ||||
| 472 | ExprResult PromiseRef = S.BuildDeclRefExpr( | ||||
| 473 | Promise, Promise->getType().getNonReferenceType(), VK_LValue, Loc); | ||||
| 474 | if (PromiseRef.isInvalid()) | ||||
| 475 | return ExprError(); | ||||
| 476 | |||||
| 477 | return buildMemberCall(S, PromiseRef.get(), Loc, Name, Args); | ||||
| 478 | } | ||||
| 479 | |||||
| 480 | VarDecl *Sema::buildCoroutinePromise(SourceLocation Loc) { | ||||
| 481 | assert(isa<FunctionDecl>(CurContext) && "not in a function scope")((isa<FunctionDecl>(CurContext) && "not in a function scope" ) ? static_cast<void> (0) : __assert_fail ("isa<FunctionDecl>(CurContext) && \"not in a function scope\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaCoroutine.cpp" , 481, __PRETTY_FUNCTION__)); | ||||
| 482 | auto *FD = cast<FunctionDecl>(CurContext); | ||||
| 483 | bool IsThisDependentType = [&] { | ||||
| 484 | if (auto *MD = dyn_cast_or_null<CXXMethodDecl>(FD)) | ||||
| 485 | return MD->isInstance() && MD->getThisType()->isDependentType(); | ||||
| 486 | else | ||||
| 487 | return false; | ||||
| 488 | }(); | ||||
| 489 | |||||
| 490 | QualType T = FD->getType()->isDependentType() || IsThisDependentType
|
15.1 | 'IsThisDependentType' is false |
1 | Calling 'Sema::ActOnCoroutineBodyStart' |
| 1 | //===- DeclCXX.h - Classes for representing C++ declarations --*- C++ -*-=====// |
| 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 | // |
| 9 | /// \file |
| 10 | /// Defines the C++ Decl subclasses, other than those for templates |
| 11 | /// (found in DeclTemplate.h) and friends (in DeclFriend.h). |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #ifndef LLVM_CLANG_AST_DECLCXX_H |
| 16 | #define LLVM_CLANG_AST_DECLCXX_H |
| 17 | |
| 18 | #include "clang/AST/ASTContext.h" |
| 19 | #include "clang/AST/ASTUnresolvedSet.h" |
| 20 | #include "clang/AST/Attr.h" |
| 21 | #include "clang/AST/Decl.h" |
| 22 | #include "clang/AST/DeclBase.h" |
| 23 | #include "clang/AST/DeclarationName.h" |
| 24 | #include "clang/AST/Expr.h" |
| 25 | #include "clang/AST/ExternalASTSource.h" |
| 26 | #include "clang/AST/LambdaCapture.h" |
| 27 | #include "clang/AST/NestedNameSpecifier.h" |
| 28 | #include "clang/AST/Redeclarable.h" |
| 29 | #include "clang/AST/Stmt.h" |
| 30 | #include "clang/AST/Type.h" |
| 31 | #include "clang/AST/TypeLoc.h" |
| 32 | #include "clang/AST/UnresolvedSet.h" |
| 33 | #include "clang/Basic/LLVM.h" |
| 34 | #include "clang/Basic/Lambda.h" |
| 35 | #include "clang/Basic/LangOptions.h" |
| 36 | #include "clang/Basic/OperatorKinds.h" |
| 37 | #include "clang/Basic/SourceLocation.h" |
| 38 | #include "clang/Basic/Specifiers.h" |
| 39 | #include "llvm/ADT/ArrayRef.h" |
| 40 | #include "llvm/ADT/DenseMap.h" |
| 41 | #include "llvm/ADT/PointerIntPair.h" |
| 42 | #include "llvm/ADT/PointerUnion.h" |
| 43 | #include "llvm/ADT/STLExtras.h" |
| 44 | #include "llvm/ADT/iterator_range.h" |
| 45 | #include "llvm/BinaryFormat/Dwarf.h" |
| 46 | #include "llvm/Support/Casting.h" |
| 47 | #include "llvm/Support/Compiler.h" |
| 48 | #include "llvm/Support/PointerLikeTypeTraits.h" |
| 49 | #include "llvm/Support/TrailingObjects.h" |
| 50 | #include <cassert> |
| 51 | #include <cstddef> |
| 52 | #include <iterator> |
| 53 | #include <memory> |
| 54 | #include <vector> |
| 55 | |
| 56 | namespace clang { |
| 57 | |
| 58 | class ClassTemplateDecl; |
| 59 | class ConstructorUsingShadowDecl; |
| 60 | class CXXBasePath; |
| 61 | class CXXBasePaths; |
| 62 | class CXXConstructorDecl; |
| 63 | class CXXDestructorDecl; |
| 64 | class CXXFinalOverriderMap; |
| 65 | class CXXIndirectPrimaryBaseSet; |
| 66 | class CXXMethodDecl; |
| 67 | class DecompositionDecl; |
| 68 | class DiagnosticBuilder; |
| 69 | class FriendDecl; |
| 70 | class FunctionTemplateDecl; |
| 71 | class IdentifierInfo; |
| 72 | class MemberSpecializationInfo; |
| 73 | class TemplateDecl; |
| 74 | class TemplateParameterList; |
| 75 | class UsingDecl; |
| 76 | |
| 77 | /// Represents an access specifier followed by colon ':'. |
| 78 | /// |
| 79 | /// An objects of this class represents sugar for the syntactic occurrence |
| 80 | /// of an access specifier followed by a colon in the list of member |
| 81 | /// specifiers of a C++ class definition. |
| 82 | /// |
| 83 | /// Note that they do not represent other uses of access specifiers, |
| 84 | /// such as those occurring in a list of base specifiers. |
| 85 | /// Also note that this class has nothing to do with so-called |
| 86 | /// "access declarations" (C++98 11.3 [class.access.dcl]). |
| 87 | class AccessSpecDecl : public Decl { |
| 88 | /// The location of the ':'. |
| 89 | SourceLocation ColonLoc; |
| 90 | |
| 91 | AccessSpecDecl(AccessSpecifier AS, DeclContext *DC, |
| 92 | SourceLocation ASLoc, SourceLocation ColonLoc) |
| 93 | : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) { |
| 94 | setAccess(AS); |
| 95 | } |
| 96 | |
| 97 | AccessSpecDecl(EmptyShell Empty) : Decl(AccessSpec, Empty) {} |
| 98 | |
| 99 | virtual void anchor(); |
| 100 | |
| 101 | public: |
| 102 | /// The location of the access specifier. |
| 103 | SourceLocation getAccessSpecifierLoc() const { return getLocation(); } |
| 104 | |
| 105 | /// Sets the location of the access specifier. |
| 106 | void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); } |
| 107 | |
| 108 | /// The location of the colon following the access specifier. |
| 109 | SourceLocation getColonLoc() const { return ColonLoc; } |
| 110 | |
| 111 | /// Sets the location of the colon. |
| 112 | void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; } |
| 113 | |
| 114 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 115 | return SourceRange(getAccessSpecifierLoc(), getColonLoc()); |
| 116 | } |
| 117 | |
| 118 | static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS, |
| 119 | DeclContext *DC, SourceLocation ASLoc, |
| 120 | SourceLocation ColonLoc) { |
| 121 | return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc); |
| 122 | } |
| 123 | |
| 124 | static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 125 | |
| 126 | // Implement isa/cast/dyncast/etc. |
| 127 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 128 | static bool classofKind(Kind K) { return K == AccessSpec; } |
| 129 | }; |
| 130 | |
| 131 | /// Represents a base class of a C++ class. |
| 132 | /// |
| 133 | /// Each CXXBaseSpecifier represents a single, direct base class (or |
| 134 | /// struct) of a C++ class (or struct). It specifies the type of that |
| 135 | /// base class, whether it is a virtual or non-virtual base, and what |
| 136 | /// level of access (public, protected, private) is used for the |
| 137 | /// derivation. For example: |
| 138 | /// |
| 139 | /// \code |
| 140 | /// class A { }; |
| 141 | /// class B { }; |
| 142 | /// class C : public virtual A, protected B { }; |
| 143 | /// \endcode |
| 144 | /// |
| 145 | /// In this code, C will have two CXXBaseSpecifiers, one for "public |
| 146 | /// virtual A" and the other for "protected B". |
| 147 | class CXXBaseSpecifier { |
| 148 | /// The source code range that covers the full base |
| 149 | /// specifier, including the "virtual" (if present) and access |
| 150 | /// specifier (if present). |
| 151 | SourceRange Range; |
| 152 | |
| 153 | /// The source location of the ellipsis, if this is a pack |
| 154 | /// expansion. |
| 155 | SourceLocation EllipsisLoc; |
| 156 | |
| 157 | /// Whether this is a virtual base class or not. |
| 158 | unsigned Virtual : 1; |
| 159 | |
| 160 | /// Whether this is the base of a class (true) or of a struct (false). |
| 161 | /// |
| 162 | /// This determines the mapping from the access specifier as written in the |
| 163 | /// source code to the access specifier used for semantic analysis. |
| 164 | unsigned BaseOfClass : 1; |
| 165 | |
| 166 | /// Access specifier as written in the source code (may be AS_none). |
| 167 | /// |
| 168 | /// The actual type of data stored here is an AccessSpecifier, but we use |
| 169 | /// "unsigned" here to work around a VC++ bug. |
| 170 | unsigned Access : 2; |
| 171 | |
| 172 | /// Whether the class contains a using declaration |
| 173 | /// to inherit the named class's constructors. |
| 174 | unsigned InheritConstructors : 1; |
| 175 | |
| 176 | /// The type of the base class. |
| 177 | /// |
| 178 | /// This will be a class or struct (or a typedef of such). The source code |
| 179 | /// range does not include the \c virtual or the access specifier. |
| 180 | TypeSourceInfo *BaseTypeInfo; |
| 181 | |
| 182 | public: |
| 183 | CXXBaseSpecifier() = default; |
| 184 | CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A, |
| 185 | TypeSourceInfo *TInfo, SourceLocation EllipsisLoc) |
| 186 | : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC), |
| 187 | Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) {} |
| 188 | |
| 189 | /// Retrieves the source range that contains the entire base specifier. |
| 190 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
| 191 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
| 192 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
| 193 | |
| 194 | /// Get the location at which the base class type was written. |
| 195 | SourceLocation getBaseTypeLoc() const LLVM_READONLY__attribute__((__pure__)) { |
| 196 | return BaseTypeInfo->getTypeLoc().getBeginLoc(); |
| 197 | } |
| 198 | |
| 199 | /// Determines whether the base class is a virtual base class (or not). |
| 200 | bool isVirtual() const { return Virtual; } |
| 201 | |
| 202 | /// Determine whether this base class is a base of a class declared |
| 203 | /// with the 'class' keyword (vs. one declared with the 'struct' keyword). |
| 204 | bool isBaseOfClass() const { return BaseOfClass; } |
| 205 | |
| 206 | /// Determine whether this base specifier is a pack expansion. |
| 207 | bool isPackExpansion() const { return EllipsisLoc.isValid(); } |
| 208 | |
| 209 | /// Determine whether this base class's constructors get inherited. |
| 210 | bool getInheritConstructors() const { return InheritConstructors; } |
| 211 | |
| 212 | /// Set that this base class's constructors should be inherited. |
| 213 | void setInheritConstructors(bool Inherit = true) { |
| 214 | InheritConstructors = Inherit; |
| 215 | } |
| 216 | |
| 217 | /// For a pack expansion, determine the location of the ellipsis. |
| 218 | SourceLocation getEllipsisLoc() const { |
| 219 | return EllipsisLoc; |
| 220 | } |
| 221 | |
| 222 | /// Returns the access specifier for this base specifier. |
| 223 | /// |
| 224 | /// This is the actual base specifier as used for semantic analysis, so |
| 225 | /// the result can never be AS_none. To retrieve the access specifier as |
| 226 | /// written in the source code, use getAccessSpecifierAsWritten(). |
| 227 | AccessSpecifier getAccessSpecifier() const { |
| 228 | if ((AccessSpecifier)Access == AS_none) |
| 229 | return BaseOfClass? AS_private : AS_public; |
| 230 | else |
| 231 | return (AccessSpecifier)Access; |
| 232 | } |
| 233 | |
| 234 | /// Retrieves the access specifier as written in the source code |
| 235 | /// (which may mean that no access specifier was explicitly written). |
| 236 | /// |
| 237 | /// Use getAccessSpecifier() to retrieve the access specifier for use in |
| 238 | /// semantic analysis. |
| 239 | AccessSpecifier getAccessSpecifierAsWritten() const { |
| 240 | return (AccessSpecifier)Access; |
| 241 | } |
| 242 | |
| 243 | /// Retrieves the type of the base class. |
| 244 | /// |
| 245 | /// This type will always be an unqualified class type. |
| 246 | QualType getType() const { |
| 247 | return BaseTypeInfo->getType().getUnqualifiedType(); |
| 248 | } |
| 249 | |
| 250 | /// Retrieves the type and source location of the base class. |
| 251 | TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; } |
| 252 | }; |
| 253 | |
| 254 | /// Represents a C++ struct/union/class. |
| 255 | class CXXRecordDecl : public RecordDecl { |
| 256 | friend class ASTDeclReader; |
| 257 | friend class ASTDeclWriter; |
| 258 | friend class ASTNodeImporter; |
| 259 | friend class ASTReader; |
| 260 | friend class ASTRecordWriter; |
| 261 | friend class ASTWriter; |
| 262 | friend class DeclContext; |
| 263 | friend class LambdaExpr; |
| 264 | |
| 265 | friend void FunctionDecl::setPure(bool); |
| 266 | friend void TagDecl::startDefinition(); |
| 267 | |
| 268 | /// Values used in DefinitionData fields to represent special members. |
| 269 | enum SpecialMemberFlags { |
| 270 | SMF_DefaultConstructor = 0x1, |
| 271 | SMF_CopyConstructor = 0x2, |
| 272 | SMF_MoveConstructor = 0x4, |
| 273 | SMF_CopyAssignment = 0x8, |
| 274 | SMF_MoveAssignment = 0x10, |
| 275 | SMF_Destructor = 0x20, |
| 276 | SMF_All = 0x3f |
| 277 | }; |
| 278 | |
| 279 | struct DefinitionData { |
| 280 | /// True if this class has any user-declared constructors. |
| 281 | unsigned UserDeclaredConstructor : 1; |
| 282 | |
| 283 | /// The user-declared special members which this class has. |
| 284 | unsigned UserDeclaredSpecialMembers : 6; |
| 285 | |
| 286 | /// True when this class is an aggregate. |
| 287 | unsigned Aggregate : 1; |
| 288 | |
| 289 | /// True when this class is a POD-type. |
| 290 | unsigned PlainOldData : 1; |
| 291 | |
| 292 | /// True when this class is empty for traits purposes, that is: |
| 293 | /// * has no data members other than 0-width bit-fields and empty fields |
| 294 | /// marked [[no_unique_address]] |
| 295 | /// * has no virtual function/base, and |
| 296 | /// * doesn't inherit from a non-empty class. |
| 297 | /// Doesn't take union-ness into account. |
| 298 | unsigned Empty : 1; |
| 299 | |
| 300 | /// True when this class is polymorphic, i.e., has at |
| 301 | /// least one virtual member or derives from a polymorphic class. |
| 302 | unsigned Polymorphic : 1; |
| 303 | |
| 304 | /// True when this class is abstract, i.e., has at least |
| 305 | /// one pure virtual function, (that can come from a base class). |
| 306 | unsigned Abstract : 1; |
| 307 | |
| 308 | /// True when this class is standard-layout, per the applicable |
| 309 | /// language rules (including DRs). |
| 310 | unsigned IsStandardLayout : 1; |
| 311 | |
| 312 | /// True when this class was standard-layout under the C++11 |
| 313 | /// definition. |
| 314 | /// |
| 315 | /// C++11 [class]p7. A standard-layout class is a class that: |
| 316 | /// * has no non-static data members of type non-standard-layout class (or |
| 317 | /// array of such types) or reference, |
| 318 | /// * has no virtual functions (10.3) and no virtual base classes (10.1), |
| 319 | /// * has the same access control (Clause 11) for all non-static data |
| 320 | /// members |
| 321 | /// * has no non-standard-layout base classes, |
| 322 | /// * either has no non-static data members in the most derived class and at |
| 323 | /// most one base class with non-static data members, or has no base |
| 324 | /// classes with non-static data members, and |
| 325 | /// * has no base classes of the same type as the first non-static data |
| 326 | /// member. |
| 327 | unsigned IsCXX11StandardLayout : 1; |
| 328 | |
| 329 | /// True when any base class has any declared non-static data |
| 330 | /// members or bit-fields. |
| 331 | /// This is a helper bit of state used to implement IsStandardLayout more |
| 332 | /// efficiently. |
| 333 | unsigned HasBasesWithFields : 1; |
| 334 | |
| 335 | /// True when any base class has any declared non-static data |
| 336 | /// members. |
| 337 | /// This is a helper bit of state used to implement IsCXX11StandardLayout |
| 338 | /// more efficiently. |
| 339 | unsigned HasBasesWithNonStaticDataMembers : 1; |
| 340 | |
| 341 | /// True when there are private non-static data members. |
| 342 | unsigned HasPrivateFields : 1; |
| 343 | |
| 344 | /// True when there are protected non-static data members. |
| 345 | unsigned HasProtectedFields : 1; |
| 346 | |
| 347 | /// True when there are private non-static data members. |
| 348 | unsigned HasPublicFields : 1; |
| 349 | |
| 350 | /// True if this class (or any subobject) has mutable fields. |
| 351 | unsigned HasMutableFields : 1; |
| 352 | |
| 353 | /// True if this class (or any nested anonymous struct or union) |
| 354 | /// has variant members. |
| 355 | unsigned HasVariantMembers : 1; |
| 356 | |
| 357 | /// True if there no non-field members declared by the user. |
| 358 | unsigned HasOnlyCMembers : 1; |
| 359 | |
| 360 | /// True if any field has an in-class initializer, including those |
| 361 | /// within anonymous unions or structs. |
| 362 | unsigned HasInClassInitializer : 1; |
| 363 | |
| 364 | /// True if any field is of reference type, and does not have an |
| 365 | /// in-class initializer. |
| 366 | /// |
| 367 | /// In this case, value-initialization of this class is illegal in C++98 |
| 368 | /// even if the class has a trivial default constructor. |
| 369 | unsigned HasUninitializedReferenceMember : 1; |
| 370 | |
| 371 | /// True if any non-mutable field whose type doesn't have a user- |
| 372 | /// provided default ctor also doesn't have an in-class initializer. |
| 373 | unsigned HasUninitializedFields : 1; |
| 374 | |
| 375 | /// True if there are any member using-declarations that inherit |
| 376 | /// constructors from a base class. |
| 377 | unsigned HasInheritedConstructor : 1; |
| 378 | |
| 379 | /// True if there are any member using-declarations named |
| 380 | /// 'operator='. |
| 381 | unsigned HasInheritedAssignment : 1; |
| 382 | |
| 383 | /// These flags are \c true if a defaulted corresponding special |
| 384 | /// member can't be fully analyzed without performing overload resolution. |
| 385 | /// @{ |
| 386 | unsigned NeedOverloadResolutionForCopyConstructor : 1; |
| 387 | unsigned NeedOverloadResolutionForMoveConstructor : 1; |
| 388 | unsigned NeedOverloadResolutionForMoveAssignment : 1; |
| 389 | unsigned NeedOverloadResolutionForDestructor : 1; |
| 390 | /// @} |
| 391 | |
| 392 | /// These flags are \c true if an implicit defaulted corresponding |
| 393 | /// special member would be defined as deleted. |
| 394 | /// @{ |
| 395 | unsigned DefaultedCopyConstructorIsDeleted : 1; |
| 396 | unsigned DefaultedMoveConstructorIsDeleted : 1; |
| 397 | unsigned DefaultedMoveAssignmentIsDeleted : 1; |
| 398 | unsigned DefaultedDestructorIsDeleted : 1; |
| 399 | /// @} |
| 400 | |
| 401 | /// The trivial special members which this class has, per |
| 402 | /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25, |
| 403 | /// C++11 [class.dtor]p5, or would have if the member were not suppressed. |
| 404 | /// |
| 405 | /// This excludes any user-declared but not user-provided special members |
| 406 | /// which have been declared but not yet defined. |
| 407 | unsigned HasTrivialSpecialMembers : 6; |
| 408 | |
| 409 | /// These bits keep track of the triviality of special functions for the |
| 410 | /// purpose of calls. Only the bits corresponding to SMF_CopyConstructor, |
| 411 | /// SMF_MoveConstructor, and SMF_Destructor are meaningful here. |
| 412 | unsigned HasTrivialSpecialMembersForCall : 6; |
| 413 | |
| 414 | /// The declared special members of this class which are known to be |
| 415 | /// non-trivial. |
| 416 | /// |
| 417 | /// This excludes any user-declared but not user-provided special members |
| 418 | /// which have been declared but not yet defined, and any implicit special |
| 419 | /// members which have not yet been declared. |
| 420 | unsigned DeclaredNonTrivialSpecialMembers : 6; |
| 421 | |
| 422 | /// These bits keep track of the declared special members that are |
| 423 | /// non-trivial for the purpose of calls. |
| 424 | /// Only the bits corresponding to SMF_CopyConstructor, |
| 425 | /// SMF_MoveConstructor, and SMF_Destructor are meaningful here. |
| 426 | unsigned DeclaredNonTrivialSpecialMembersForCall : 6; |
| 427 | |
| 428 | /// True when this class has a destructor with no semantic effect. |
| 429 | unsigned HasIrrelevantDestructor : 1; |
| 430 | |
| 431 | /// True when this class has at least one user-declared constexpr |
| 432 | /// constructor which is neither the copy nor move constructor. |
| 433 | unsigned HasConstexprNonCopyMoveConstructor : 1; |
| 434 | |
| 435 | /// True if this class has a (possibly implicit) defaulted default |
| 436 | /// constructor. |
| 437 | unsigned HasDefaultedDefaultConstructor : 1; |
| 438 | |
| 439 | /// True if a defaulted default constructor for this class would |
| 440 | /// be constexpr. |
| 441 | unsigned DefaultedDefaultConstructorIsConstexpr : 1; |
| 442 | |
| 443 | /// True if this class has a constexpr default constructor. |
| 444 | /// |
| 445 | /// This is true for either a user-declared constexpr default constructor |
| 446 | /// or an implicitly declared constexpr default constructor. |
| 447 | unsigned HasConstexprDefaultConstructor : 1; |
| 448 | |
| 449 | /// True if a defaulted destructor for this class would be constexpr. |
| 450 | unsigned DefaultedDestructorIsConstexpr : 1; |
| 451 | |
| 452 | /// True when this class contains at least one non-static data |
| 453 | /// member or base class of non-literal or volatile type. |
| 454 | unsigned HasNonLiteralTypeFieldsOrBases : 1; |
| 455 | |
| 456 | /// True when visible conversion functions are already computed |
| 457 | /// and are available. |
| 458 | unsigned ComputedVisibleConversions : 1; |
| 459 | |
| 460 | /// Whether we have a C++11 user-provided default constructor (not |
| 461 | /// explicitly deleted or defaulted). |
| 462 | unsigned UserProvidedDefaultConstructor : 1; |
| 463 | |
| 464 | /// The special members which have been declared for this class, |
| 465 | /// either by the user or implicitly. |
| 466 | unsigned DeclaredSpecialMembers : 6; |
| 467 | |
| 468 | /// Whether an implicit copy constructor could have a const-qualified |
| 469 | /// parameter, for initializing virtual bases and for other subobjects. |
| 470 | unsigned ImplicitCopyConstructorCanHaveConstParamForVBase : 1; |
| 471 | unsigned ImplicitCopyConstructorCanHaveConstParamForNonVBase : 1; |
| 472 | |
| 473 | /// Whether an implicit copy assignment operator would have a |
| 474 | /// const-qualified parameter. |
| 475 | unsigned ImplicitCopyAssignmentHasConstParam : 1; |
| 476 | |
| 477 | /// Whether any declared copy constructor has a const-qualified |
| 478 | /// parameter. |
| 479 | unsigned HasDeclaredCopyConstructorWithConstParam : 1; |
| 480 | |
| 481 | /// Whether any declared copy assignment operator has either a |
| 482 | /// const-qualified reference parameter or a non-reference parameter. |
| 483 | unsigned HasDeclaredCopyAssignmentWithConstParam : 1; |
| 484 | |
| 485 | /// Whether this class describes a C++ lambda. |
| 486 | unsigned IsLambda : 1; |
| 487 | |
| 488 | /// Whether we are currently parsing base specifiers. |
| 489 | unsigned IsParsingBaseSpecifiers : 1; |
| 490 | |
| 491 | unsigned HasODRHash : 1; |
| 492 | |
| 493 | /// A hash of parts of the class to help in ODR checking. |
| 494 | unsigned ODRHash = 0; |
| 495 | |
| 496 | /// The number of base class specifiers in Bases. |
| 497 | unsigned NumBases = 0; |
| 498 | |
| 499 | /// The number of virtual base class specifiers in VBases. |
| 500 | unsigned NumVBases = 0; |
| 501 | |
| 502 | /// Base classes of this class. |
| 503 | /// |
| 504 | /// FIXME: This is wasted space for a union. |
| 505 | LazyCXXBaseSpecifiersPtr Bases; |
| 506 | |
| 507 | /// direct and indirect virtual base classes of this class. |
| 508 | LazyCXXBaseSpecifiersPtr VBases; |
| 509 | |
| 510 | /// The conversion functions of this C++ class (but not its |
| 511 | /// inherited conversion functions). |
| 512 | /// |
| 513 | /// Each of the entries in this overload set is a CXXConversionDecl. |
| 514 | LazyASTUnresolvedSet Conversions; |
| 515 | |
| 516 | /// The conversion functions of this C++ class and all those |
| 517 | /// inherited conversion functions that are visible in this class. |
| 518 | /// |
| 519 | /// Each of the entries in this overload set is a CXXConversionDecl or a |
| 520 | /// FunctionTemplateDecl. |
| 521 | LazyASTUnresolvedSet VisibleConversions; |
| 522 | |
| 523 | /// The declaration which defines this record. |
| 524 | CXXRecordDecl *Definition; |
| 525 | |
| 526 | /// The first friend declaration in this class, or null if there |
| 527 | /// aren't any. |
| 528 | /// |
| 529 | /// This is actually currently stored in reverse order. |
| 530 | LazyDeclPtr FirstFriend; |
| 531 | |
| 532 | DefinitionData(CXXRecordDecl *D); |
| 533 | |
| 534 | /// Retrieve the set of direct base classes. |
| 535 | CXXBaseSpecifier *getBases() const { |
| 536 | if (!Bases.isOffset()) |
| 537 | return Bases.get(nullptr); |
| 538 | return getBasesSlowCase(); |
| 539 | } |
| 540 | |
| 541 | /// Retrieve the set of virtual base classes. |
| 542 | CXXBaseSpecifier *getVBases() const { |
| 543 | if (!VBases.isOffset()) |
| 544 | return VBases.get(nullptr); |
| 545 | return getVBasesSlowCase(); |
| 546 | } |
| 547 | |
| 548 | ArrayRef<CXXBaseSpecifier> bases() const { |
| 549 | return llvm::makeArrayRef(getBases(), NumBases); |
| 550 | } |
| 551 | |
| 552 | ArrayRef<CXXBaseSpecifier> vbases() const { |
| 553 | return llvm::makeArrayRef(getVBases(), NumVBases); |
| 554 | } |
| 555 | |
| 556 | private: |
| 557 | CXXBaseSpecifier *getBasesSlowCase() const; |
| 558 | CXXBaseSpecifier *getVBasesSlowCase() const; |
| 559 | }; |
| 560 | |
| 561 | struct DefinitionData *DefinitionData; |
| 562 | |
| 563 | /// Describes a C++ closure type (generated by a lambda expression). |
| 564 | struct LambdaDefinitionData : public DefinitionData { |
| 565 | using Capture = LambdaCapture; |
| 566 | |
| 567 | /// Whether this lambda is known to be dependent, even if its |
| 568 | /// context isn't dependent. |
| 569 | /// |
| 570 | /// A lambda with a non-dependent context can be dependent if it occurs |
| 571 | /// within the default argument of a function template, because the |
| 572 | /// lambda will have been created with the enclosing context as its |
| 573 | /// declaration context, rather than function. This is an unfortunate |
| 574 | /// artifact of having to parse the default arguments before. |
| 575 | unsigned Dependent : 1; |
| 576 | |
| 577 | /// Whether this lambda is a generic lambda. |
| 578 | unsigned IsGenericLambda : 1; |
| 579 | |
| 580 | /// The Default Capture. |
| 581 | unsigned CaptureDefault : 2; |
| 582 | |
| 583 | /// The number of captures in this lambda is limited 2^NumCaptures. |
| 584 | unsigned NumCaptures : 15; |
| 585 | |
| 586 | /// The number of explicit captures in this lambda. |
| 587 | unsigned NumExplicitCaptures : 13; |
| 588 | |
| 589 | /// The number used to indicate this lambda expression for name |
| 590 | /// mangling in the Itanium C++ ABI. |
| 591 | unsigned ManglingNumber = 0; |
| 592 | |
| 593 | /// The declaration that provides context for this lambda, if the |
| 594 | /// actual DeclContext does not suffice. This is used for lambdas that |
| 595 | /// occur within default arguments of function parameters within the class |
| 596 | /// or within a data member initializer. |
| 597 | LazyDeclPtr ContextDecl; |
| 598 | |
| 599 | /// The list of captures, both explicit and implicit, for this |
| 600 | /// lambda. |
| 601 | Capture *Captures = nullptr; |
| 602 | |
| 603 | /// The type of the call method. |
| 604 | TypeSourceInfo *MethodTyInfo; |
| 605 | |
| 606 | LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info, |
| 607 | bool Dependent, bool IsGeneric, |
| 608 | LambdaCaptureDefault CaptureDefault) |
| 609 | : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric), |
| 610 | CaptureDefault(CaptureDefault), NumCaptures(0), NumExplicitCaptures(0), |
| 611 | MethodTyInfo(Info) { |
| 612 | IsLambda = true; |
| 613 | |
| 614 | // C++1z [expr.prim.lambda]p4: |
| 615 | // This class type is not an aggregate type. |
| 616 | Aggregate = false; |
| 617 | PlainOldData = false; |
| 618 | } |
| 619 | }; |
| 620 | |
| 621 | struct DefinitionData *dataPtr() const { |
| 622 | // Complete the redecl chain (if necessary). |
| 623 | getMostRecentDecl(); |
| 624 | return DefinitionData; |
| 625 | } |
| 626 | |
| 627 | struct DefinitionData &data() const { |
| 628 | auto *DD = dataPtr(); |
| 629 | assert(DD && "queried property of class with no definition")((DD && "queried property of class with no definition" ) ? static_cast<void> (0) : __assert_fail ("DD && \"queried property of class with no definition\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 629, __PRETTY_FUNCTION__)); |
| 630 | return *DD; |
| 631 | } |
| 632 | |
| 633 | struct LambdaDefinitionData &getLambdaData() const { |
| 634 | // No update required: a merged definition cannot change any lambda |
| 635 | // properties. |
| 636 | auto *DD = DefinitionData; |
| 637 | assert(DD && DD->IsLambda && "queried lambda property of non-lambda class")((DD && DD->IsLambda && "queried lambda property of non-lambda class" ) ? static_cast<void> (0) : __assert_fail ("DD && DD->IsLambda && \"queried lambda property of non-lambda class\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 637, __PRETTY_FUNCTION__)); |
| 638 | return static_cast<LambdaDefinitionData&>(*DD); |
| 639 | } |
| 640 | |
| 641 | /// The template or declaration that this declaration |
| 642 | /// describes or was instantiated from, respectively. |
| 643 | /// |
| 644 | /// For non-templates, this value will be null. For record |
| 645 | /// declarations that describe a class template, this will be a |
| 646 | /// pointer to a ClassTemplateDecl. For member |
| 647 | /// classes of class template specializations, this will be the |
| 648 | /// MemberSpecializationInfo referring to the member class that was |
| 649 | /// instantiated or specialized. |
| 650 | llvm::PointerUnion<ClassTemplateDecl *, MemberSpecializationInfo *> |
| 651 | TemplateOrInstantiation; |
| 652 | |
| 653 | /// Called from setBases and addedMember to notify the class that a |
| 654 | /// direct or virtual base class or a member of class type has been added. |
| 655 | void addedClassSubobject(CXXRecordDecl *Base); |
| 656 | |
| 657 | /// Notify the class that member has been added. |
| 658 | /// |
| 659 | /// This routine helps maintain information about the class based on which |
| 660 | /// members have been added. It will be invoked by DeclContext::addDecl() |
| 661 | /// whenever a member is added to this record. |
| 662 | void addedMember(Decl *D); |
| 663 | |
| 664 | void markedVirtualFunctionPure(); |
| 665 | |
| 666 | /// Get the head of our list of friend declarations, possibly |
| 667 | /// deserializing the friends from an external AST source. |
| 668 | FriendDecl *getFirstFriend() const; |
| 669 | |
| 670 | /// Determine whether this class has an empty base class subobject of type X |
| 671 | /// or of one of the types that might be at offset 0 within X (per the C++ |
| 672 | /// "standard layout" rules). |
| 673 | bool hasSubobjectAtOffsetZeroOfEmptyBaseType(ASTContext &Ctx, |
| 674 | const CXXRecordDecl *X); |
| 675 | |
| 676 | protected: |
| 677 | CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC, |
| 678 | SourceLocation StartLoc, SourceLocation IdLoc, |
| 679 | IdentifierInfo *Id, CXXRecordDecl *PrevDecl); |
| 680 | |
| 681 | public: |
| 682 | /// Iterator that traverses the base classes of a class. |
| 683 | using base_class_iterator = CXXBaseSpecifier *; |
| 684 | |
| 685 | /// Iterator that traverses the base classes of a class. |
| 686 | using base_class_const_iterator = const CXXBaseSpecifier *; |
| 687 | |
| 688 | CXXRecordDecl *getCanonicalDecl() override { |
| 689 | return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl()); |
| 690 | } |
| 691 | |
| 692 | const CXXRecordDecl *getCanonicalDecl() const { |
| 693 | return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl(); |
| 694 | } |
| 695 | |
| 696 | CXXRecordDecl *getPreviousDecl() { |
| 697 | return cast_or_null<CXXRecordDecl>( |
| 698 | static_cast<RecordDecl *>(this)->getPreviousDecl()); |
| 699 | } |
| 700 | |
| 701 | const CXXRecordDecl *getPreviousDecl() const { |
| 702 | return const_cast<CXXRecordDecl*>(this)->getPreviousDecl(); |
| 703 | } |
| 704 | |
| 705 | CXXRecordDecl *getMostRecentDecl() { |
| 706 | return cast<CXXRecordDecl>( |
| 707 | static_cast<RecordDecl *>(this)->getMostRecentDecl()); |
| 708 | } |
| 709 | |
| 710 | const CXXRecordDecl *getMostRecentDecl() const { |
| 711 | return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl(); |
| 712 | } |
| 713 | |
| 714 | CXXRecordDecl *getMostRecentNonInjectedDecl() { |
| 715 | CXXRecordDecl *Recent = |
| 716 | static_cast<CXXRecordDecl *>(this)->getMostRecentDecl(); |
| 717 | while (Recent->isInjectedClassName()) { |
| 718 | // FIXME: Does injected class name need to be in the redeclarations chain? |
| 719 | assert(Recent->getPreviousDecl())((Recent->getPreviousDecl()) ? static_cast<void> (0) : __assert_fail ("Recent->getPreviousDecl()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 719, __PRETTY_FUNCTION__)); |
| 720 | Recent = Recent->getPreviousDecl(); |
| 721 | } |
| 722 | return Recent; |
| 723 | } |
| 724 | |
| 725 | const CXXRecordDecl *getMostRecentNonInjectedDecl() const { |
| 726 | return const_cast<CXXRecordDecl*>(this)->getMostRecentNonInjectedDecl(); |
| 727 | } |
| 728 | |
| 729 | CXXRecordDecl *getDefinition() const { |
| 730 | // We only need an update if we don't already know which |
| 731 | // declaration is the definition. |
| 732 | auto *DD = DefinitionData ? DefinitionData : dataPtr(); |
| 733 | return DD ? DD->Definition : nullptr; |
| 734 | } |
| 735 | |
| 736 | bool hasDefinition() const { return DefinitionData || dataPtr(); } |
| 737 | |
| 738 | static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC, |
| 739 | SourceLocation StartLoc, SourceLocation IdLoc, |
| 740 | IdentifierInfo *Id, |
| 741 | CXXRecordDecl *PrevDecl = nullptr, |
| 742 | bool DelayTypeCreation = false); |
| 743 | static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC, |
| 744 | TypeSourceInfo *Info, SourceLocation Loc, |
| 745 | bool DependentLambda, bool IsGeneric, |
| 746 | LambdaCaptureDefault CaptureDefault); |
| 747 | static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID); |
| 748 | |
| 749 | bool isDynamicClass() const { |
| 750 | return data().Polymorphic || data().NumVBases != 0; |
| 751 | } |
| 752 | |
| 753 | /// @returns true if class is dynamic or might be dynamic because the |
| 754 | /// definition is incomplete of dependent. |
| 755 | bool mayBeDynamicClass() const { |
| 756 | return !hasDefinition() || isDynamicClass() || hasAnyDependentBases(); |
| 757 | } |
| 758 | |
| 759 | /// @returns true if class is non dynamic or might be non dynamic because the |
| 760 | /// definition is incomplete of dependent. |
| 761 | bool mayBeNonDynamicClass() const { |
| 762 | return !hasDefinition() || !isDynamicClass() || hasAnyDependentBases(); |
| 763 | } |
| 764 | |
| 765 | void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; } |
| 766 | |
| 767 | bool isParsingBaseSpecifiers() const { |
| 768 | return data().IsParsingBaseSpecifiers; |
| 769 | } |
| 770 | |
| 771 | unsigned getODRHash() const; |
| 772 | |
| 773 | /// Sets the base classes of this struct or class. |
| 774 | void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases); |
| 775 | |
| 776 | /// Retrieves the number of base classes of this class. |
| 777 | unsigned getNumBases() const { return data().NumBases; } |
| 778 | |
| 779 | using base_class_range = llvm::iterator_range<base_class_iterator>; |
| 780 | using base_class_const_range = |
| 781 | llvm::iterator_range<base_class_const_iterator>; |
| 782 | |
| 783 | base_class_range bases() { |
| 784 | return base_class_range(bases_begin(), bases_end()); |
| 785 | } |
| 786 | base_class_const_range bases() const { |
| 787 | return base_class_const_range(bases_begin(), bases_end()); |
| 788 | } |
| 789 | |
| 790 | base_class_iterator bases_begin() { return data().getBases(); } |
| 791 | base_class_const_iterator bases_begin() const { return data().getBases(); } |
| 792 | base_class_iterator bases_end() { return bases_begin() + data().NumBases; } |
| 793 | base_class_const_iterator bases_end() const { |
| 794 | return bases_begin() + data().NumBases; |
| 795 | } |
| 796 | |
| 797 | /// Retrieves the number of virtual base classes of this class. |
| 798 | unsigned getNumVBases() const { return data().NumVBases; } |
| 799 | |
| 800 | base_class_range vbases() { |
| 801 | return base_class_range(vbases_begin(), vbases_end()); |
| 802 | } |
| 803 | base_class_const_range vbases() const { |
| 804 | return base_class_const_range(vbases_begin(), vbases_end()); |
| 805 | } |
| 806 | |
| 807 | base_class_iterator vbases_begin() { return data().getVBases(); } |
| 808 | base_class_const_iterator vbases_begin() const { return data().getVBases(); } |
| 809 | base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; } |
| 810 | base_class_const_iterator vbases_end() const { |
| 811 | return vbases_begin() + data().NumVBases; |
| 812 | } |
| 813 | |
| 814 | /// Determine whether this class has any dependent base classes which |
| 815 | /// are not the current instantiation. |
| 816 | bool hasAnyDependentBases() const; |
| 817 | |
| 818 | /// Iterator access to method members. The method iterator visits |
| 819 | /// all method members of the class, including non-instance methods, |
| 820 | /// special methods, etc. |
| 821 | using method_iterator = specific_decl_iterator<CXXMethodDecl>; |
| 822 | using method_range = |
| 823 | llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>; |
| 824 | |
| 825 | method_range methods() const { |
| 826 | return method_range(method_begin(), method_end()); |
| 827 | } |
| 828 | |
| 829 | /// Method begin iterator. Iterates in the order the methods |
| 830 | /// were declared. |
| 831 | method_iterator method_begin() const { |
| 832 | return method_iterator(decls_begin()); |
| 833 | } |
| 834 | |
| 835 | /// Method past-the-end iterator. |
| 836 | method_iterator method_end() const { |
| 837 | return method_iterator(decls_end()); |
| 838 | } |
| 839 | |
| 840 | /// Iterator access to constructor members. |
| 841 | using ctor_iterator = specific_decl_iterator<CXXConstructorDecl>; |
| 842 | using ctor_range = |
| 843 | llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>; |
| 844 | |
| 845 | ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); } |
| 846 | |
| 847 | ctor_iterator ctor_begin() const { |
| 848 | return ctor_iterator(decls_begin()); |
| 849 | } |
| 850 | |
| 851 | ctor_iterator ctor_end() const { |
| 852 | return ctor_iterator(decls_end()); |
| 853 | } |
| 854 | |
| 855 | /// An iterator over friend declarations. All of these are defined |
| 856 | /// in DeclFriend.h. |
| 857 | class friend_iterator; |
| 858 | using friend_range = llvm::iterator_range<friend_iterator>; |
| 859 | |
| 860 | friend_range friends() const; |
| 861 | friend_iterator friend_begin() const; |
| 862 | friend_iterator friend_end() const; |
| 863 | void pushFriendDecl(FriendDecl *FD); |
| 864 | |
| 865 | /// Determines whether this record has any friends. |
| 866 | bool hasFriends() const { |
| 867 | return data().FirstFriend.isValid(); |
| 868 | } |
| 869 | |
| 870 | /// \c true if a defaulted copy constructor for this class would be |
| 871 | /// deleted. |
| 872 | bool defaultedCopyConstructorIsDeleted() const { |
| 873 | assert((!needsOverloadResolutionForCopyConstructor() ||(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 875, __PRETTY_FUNCTION__)) |
| 874 | (data().DeclaredSpecialMembers & SMF_CopyConstructor)) &&(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 875, __PRETTY_FUNCTION__)) |
| 875 | "this property has not yet been computed by Sema")(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 875, __PRETTY_FUNCTION__)); |
| 876 | return data().DefaultedCopyConstructorIsDeleted; |
| 877 | } |
| 878 | |
| 879 | /// \c true if a defaulted move constructor for this class would be |
| 880 | /// deleted. |
| 881 | bool defaultedMoveConstructorIsDeleted() const { |
| 882 | assert((!needsOverloadResolutionForMoveConstructor() ||(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 884, __PRETTY_FUNCTION__)) |
| 883 | (data().DeclaredSpecialMembers & SMF_MoveConstructor)) &&(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 884, __PRETTY_FUNCTION__)) |
| 884 | "this property has not yet been computed by Sema")(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 884, __PRETTY_FUNCTION__)); |
| 885 | return data().DefaultedMoveConstructorIsDeleted; |
| 886 | } |
| 887 | |
| 888 | /// \c true if a defaulted destructor for this class would be deleted. |
| 889 | bool defaultedDestructorIsDeleted() const { |
| 890 | assert((!needsOverloadResolutionForDestructor() ||(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 892, __PRETTY_FUNCTION__)) |
| 891 | (data().DeclaredSpecialMembers & SMF_Destructor)) &&(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 892, __PRETTY_FUNCTION__)) |
| 892 | "this property has not yet been computed by Sema")(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema" ) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 892, __PRETTY_FUNCTION__)); |
| 893 | return data().DefaultedDestructorIsDeleted; |
| 894 | } |
| 895 | |
| 896 | /// \c true if we know for sure that this class has a single, |
| 897 | /// accessible, unambiguous copy constructor that is not deleted. |
| 898 | bool hasSimpleCopyConstructor() const { |
| 899 | return !hasUserDeclaredCopyConstructor() && |
| 900 | !data().DefaultedCopyConstructorIsDeleted; |
| 901 | } |
| 902 | |
| 903 | /// \c true if we know for sure that this class has a single, |
| 904 | /// accessible, unambiguous move constructor that is not deleted. |
| 905 | bool hasSimpleMoveConstructor() const { |
| 906 | return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() && |
| 907 | !data().DefaultedMoveConstructorIsDeleted; |
| 908 | } |
| 909 | |
| 910 | /// \c true if we know for sure that this class has a single, |
| 911 | /// accessible, unambiguous move assignment operator that is not deleted. |
| 912 | bool hasSimpleMoveAssignment() const { |
| 913 | return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() && |
| 914 | !data().DefaultedMoveAssignmentIsDeleted; |
| 915 | } |
| 916 | |
| 917 | /// \c true if we know for sure that this class has an accessible |
| 918 | /// destructor that is not deleted. |
| 919 | bool hasSimpleDestructor() const { |
| 920 | return !hasUserDeclaredDestructor() && |
| 921 | !data().DefaultedDestructorIsDeleted; |
| 922 | } |
| 923 | |
| 924 | /// Determine whether this class has any default constructors. |
| 925 | bool hasDefaultConstructor() const { |
| 926 | return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) || |
| 927 | needsImplicitDefaultConstructor(); |
| 928 | } |
| 929 | |
| 930 | /// Determine if we need to declare a default constructor for |
| 931 | /// this class. |
| 932 | /// |
| 933 | /// This value is used for lazy creation of default constructors. |
| 934 | bool needsImplicitDefaultConstructor() const { |
| 935 | return !data().UserDeclaredConstructor && |
| 936 | !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) && |
| 937 | (!isLambda() || lambdaIsDefaultConstructibleAndAssignable()); |
| 938 | } |
| 939 | |
| 940 | /// Determine whether this class has any user-declared constructors. |
| 941 | /// |
| 942 | /// When true, a default constructor will not be implicitly declared. |
| 943 | bool hasUserDeclaredConstructor() const { |
| 944 | return data().UserDeclaredConstructor; |
| 945 | } |
| 946 | |
| 947 | /// Whether this class has a user-provided default constructor |
| 948 | /// per C++11. |
| 949 | bool hasUserProvidedDefaultConstructor() const { |
| 950 | return data().UserProvidedDefaultConstructor; |
| 951 | } |
| 952 | |
| 953 | /// Determine whether this class has a user-declared copy constructor. |
| 954 | /// |
| 955 | /// When false, a copy constructor will be implicitly declared. |
| 956 | bool hasUserDeclaredCopyConstructor() const { |
| 957 | return data().UserDeclaredSpecialMembers & SMF_CopyConstructor; |
| 958 | } |
| 959 | |
| 960 | /// Determine whether this class needs an implicit copy |
| 961 | /// constructor to be lazily declared. |
| 962 | bool needsImplicitCopyConstructor() const { |
| 963 | return !(data().DeclaredSpecialMembers & SMF_CopyConstructor); |
| 964 | } |
| 965 | |
| 966 | /// Determine whether we need to eagerly declare a defaulted copy |
| 967 | /// constructor for this class. |
| 968 | bool needsOverloadResolutionForCopyConstructor() const { |
| 969 | // C++17 [class.copy.ctor]p6: |
| 970 | // If the class definition declares a move constructor or move assignment |
| 971 | // operator, the implicitly declared copy constructor is defined as |
| 972 | // deleted. |
| 973 | // In MSVC mode, sometimes a declared move assignment does not delete an |
| 974 | // implicit copy constructor, so defer this choice to Sema. |
| 975 | if (data().UserDeclaredSpecialMembers & |
| 976 | (SMF_MoveConstructor | SMF_MoveAssignment)) |
| 977 | return true; |
| 978 | return data().NeedOverloadResolutionForCopyConstructor; |
| 979 | } |
| 980 | |
| 981 | /// Determine whether an implicit copy constructor for this type |
| 982 | /// would have a parameter with a const-qualified reference type. |
| 983 | bool implicitCopyConstructorHasConstParam() const { |
| 984 | return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase && |
| 985 | (isAbstract() || |
| 986 | data().ImplicitCopyConstructorCanHaveConstParamForVBase); |
| 987 | } |
| 988 | |
| 989 | /// Determine whether this class has a copy constructor with |
| 990 | /// a parameter type which is a reference to a const-qualified type. |
| 991 | bool hasCopyConstructorWithConstParam() const { |
| 992 | return data().HasDeclaredCopyConstructorWithConstParam || |
| 993 | (needsImplicitCopyConstructor() && |
| 994 | implicitCopyConstructorHasConstParam()); |
| 995 | } |
| 996 | |
| 997 | /// Whether this class has a user-declared move constructor or |
| 998 | /// assignment operator. |
| 999 | /// |
| 1000 | /// When false, a move constructor and assignment operator may be |
| 1001 | /// implicitly declared. |
| 1002 | bool hasUserDeclaredMoveOperation() const { |
| 1003 | return data().UserDeclaredSpecialMembers & |
| 1004 | (SMF_MoveConstructor | SMF_MoveAssignment); |
| 1005 | } |
| 1006 | |
| 1007 | /// Determine whether this class has had a move constructor |
| 1008 | /// declared by the user. |
| 1009 | bool hasUserDeclaredMoveConstructor() const { |
| 1010 | return data().UserDeclaredSpecialMembers & SMF_MoveConstructor; |
| 1011 | } |
| 1012 | |
| 1013 | /// Determine whether this class has a move constructor. |
| 1014 | bool hasMoveConstructor() const { |
| 1015 | return (data().DeclaredSpecialMembers & SMF_MoveConstructor) || |
| 1016 | needsImplicitMoveConstructor(); |
| 1017 | } |
| 1018 | |
| 1019 | /// Set that we attempted to declare an implicit copy |
| 1020 | /// constructor, but overload resolution failed so we deleted it. |
| 1021 | void setImplicitCopyConstructorIsDeleted() { |
| 1022 | assert((data().DefaultedCopyConstructorIsDeleted ||(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor ()) && "Copy constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1024, __PRETTY_FUNCTION__)) |
| 1023 | needsOverloadResolutionForCopyConstructor()) &&(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor ()) && "Copy constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1024, __PRETTY_FUNCTION__)) |
| 1024 | "Copy constructor should not be deleted")(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor ()) && "Copy constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1024, __PRETTY_FUNCTION__)); |
| 1025 | data().DefaultedCopyConstructorIsDeleted = true; |
| 1026 | } |
| 1027 | |
| 1028 | /// Set that we attempted to declare an implicit move |
| 1029 | /// constructor, but overload resolution failed so we deleted it. |
| 1030 | void setImplicitMoveConstructorIsDeleted() { |
| 1031 | assert((data().DefaultedMoveConstructorIsDeleted ||(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor ()) && "move constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1033, __PRETTY_FUNCTION__)) |
| 1032 | needsOverloadResolutionForMoveConstructor()) &&(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor ()) && "move constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1033, __PRETTY_FUNCTION__)) |
| 1033 | "move constructor should not be deleted")(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor ()) && "move constructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1033, __PRETTY_FUNCTION__)); |
| 1034 | data().DefaultedMoveConstructorIsDeleted = true; |
| 1035 | } |
| 1036 | |
| 1037 | /// Set that we attempted to declare an implicit destructor, |
| 1038 | /// but overload resolution failed so we deleted it. |
| 1039 | void setImplicitDestructorIsDeleted() { |
| 1040 | assert((data().DefaultedDestructorIsDeleted ||(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor ()) && "destructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1042, __PRETTY_FUNCTION__)) |
| 1041 | needsOverloadResolutionForDestructor()) &&(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor ()) && "destructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1042, __PRETTY_FUNCTION__)) |
| 1042 | "destructor should not be deleted")(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor ()) && "destructor should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1042, __PRETTY_FUNCTION__)); |
| 1043 | data().DefaultedDestructorIsDeleted = true; |
| 1044 | } |
| 1045 | |
| 1046 | /// Determine whether this class should get an implicit move |
| 1047 | /// constructor or if any existing special member function inhibits this. |
| 1048 | bool needsImplicitMoveConstructor() const { |
| 1049 | return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) && |
| 1050 | !hasUserDeclaredCopyConstructor() && |
| 1051 | !hasUserDeclaredCopyAssignment() && |
| 1052 | !hasUserDeclaredMoveAssignment() && |
| 1053 | !hasUserDeclaredDestructor(); |
| 1054 | } |
| 1055 | |
| 1056 | /// Determine whether we need to eagerly declare a defaulted move |
| 1057 | /// constructor for this class. |
| 1058 | bool needsOverloadResolutionForMoveConstructor() const { |
| 1059 | return data().NeedOverloadResolutionForMoveConstructor; |
| 1060 | } |
| 1061 | |
| 1062 | /// Determine whether this class has a user-declared copy assignment |
| 1063 | /// operator. |
| 1064 | /// |
| 1065 | /// When false, a copy assignment operator will be implicitly declared. |
| 1066 | bool hasUserDeclaredCopyAssignment() const { |
| 1067 | return data().UserDeclaredSpecialMembers & SMF_CopyAssignment; |
| 1068 | } |
| 1069 | |
| 1070 | /// Determine whether this class needs an implicit copy |
| 1071 | /// assignment operator to be lazily declared. |
| 1072 | bool needsImplicitCopyAssignment() const { |
| 1073 | return !(data().DeclaredSpecialMembers & SMF_CopyAssignment); |
| 1074 | } |
| 1075 | |
| 1076 | /// Determine whether we need to eagerly declare a defaulted copy |
| 1077 | /// assignment operator for this class. |
| 1078 | bool needsOverloadResolutionForCopyAssignment() const { |
| 1079 | return data().HasMutableFields; |
| 1080 | } |
| 1081 | |
| 1082 | /// Determine whether an implicit copy assignment operator for this |
| 1083 | /// type would have a parameter with a const-qualified reference type. |
| 1084 | bool implicitCopyAssignmentHasConstParam() const { |
| 1085 | return data().ImplicitCopyAssignmentHasConstParam; |
| 1086 | } |
| 1087 | |
| 1088 | /// Determine whether this class has a copy assignment operator with |
| 1089 | /// a parameter type which is a reference to a const-qualified type or is not |
| 1090 | /// a reference. |
| 1091 | bool hasCopyAssignmentWithConstParam() const { |
| 1092 | return data().HasDeclaredCopyAssignmentWithConstParam || |
| 1093 | (needsImplicitCopyAssignment() && |
| 1094 | implicitCopyAssignmentHasConstParam()); |
| 1095 | } |
| 1096 | |
| 1097 | /// Determine whether this class has had a move assignment |
| 1098 | /// declared by the user. |
| 1099 | bool hasUserDeclaredMoveAssignment() const { |
| 1100 | return data().UserDeclaredSpecialMembers & SMF_MoveAssignment; |
| 1101 | } |
| 1102 | |
| 1103 | /// Determine whether this class has a move assignment operator. |
| 1104 | bool hasMoveAssignment() const { |
| 1105 | return (data().DeclaredSpecialMembers & SMF_MoveAssignment) || |
| 1106 | needsImplicitMoveAssignment(); |
| 1107 | } |
| 1108 | |
| 1109 | /// Set that we attempted to declare an implicit move assignment |
| 1110 | /// operator, but overload resolution failed so we deleted it. |
| 1111 | void setImplicitMoveAssignmentIsDeleted() { |
| 1112 | assert((data().DefaultedMoveAssignmentIsDeleted ||(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment ()) && "move assignment should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1114, __PRETTY_FUNCTION__)) |
| 1113 | needsOverloadResolutionForMoveAssignment()) &&(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment ()) && "move assignment should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1114, __PRETTY_FUNCTION__)) |
| 1114 | "move assignment should not be deleted")(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment ()) && "move assignment should not be deleted") ? static_cast <void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1114, __PRETTY_FUNCTION__)); |
| 1115 | data().DefaultedMoveAssignmentIsDeleted = true; |
| 1116 | } |
| 1117 | |
| 1118 | /// Determine whether this class should get an implicit move |
| 1119 | /// assignment operator or if any existing special member function inhibits |
| 1120 | /// this. |
| 1121 | bool needsImplicitMoveAssignment() const { |
| 1122 | return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) && |
| 1123 | !hasUserDeclaredCopyConstructor() && |
| 1124 | !hasUserDeclaredCopyAssignment() && |
| 1125 | !hasUserDeclaredMoveConstructor() && |
| 1126 | !hasUserDeclaredDestructor() && |
| 1127 | (!isLambda() || lambdaIsDefaultConstructibleAndAssignable()); |
| 1128 | } |
| 1129 | |
| 1130 | /// Determine whether we need to eagerly declare a move assignment |
| 1131 | /// operator for this class. |
| 1132 | bool needsOverloadResolutionForMoveAssignment() const { |
| 1133 | return data().NeedOverloadResolutionForMoveAssignment; |
| 1134 | } |
| 1135 | |
| 1136 | /// Determine whether this class has a user-declared destructor. |
| 1137 | /// |
| 1138 | /// When false, a destructor will be implicitly declared. |
| 1139 | bool hasUserDeclaredDestructor() const { |
| 1140 | return data().UserDeclaredSpecialMembers & SMF_Destructor; |
| 1141 | } |
| 1142 | |
| 1143 | /// Determine whether this class needs an implicit destructor to |
| 1144 | /// be lazily declared. |
| 1145 | bool needsImplicitDestructor() const { |
| 1146 | return !(data().DeclaredSpecialMembers & SMF_Destructor); |
| 1147 | } |
| 1148 | |
| 1149 | /// Determine whether we need to eagerly declare a destructor for this |
| 1150 | /// class. |
| 1151 | bool needsOverloadResolutionForDestructor() const { |
| 1152 | return data().NeedOverloadResolutionForDestructor; |
| 1153 | } |
| 1154 | |
| 1155 | /// Determine whether this class describes a lambda function object. |
| 1156 | bool isLambda() const { |
| 1157 | // An update record can't turn a non-lambda into a lambda. |
| 1158 | auto *DD = DefinitionData; |
| 1159 | return DD && DD->IsLambda; |
| 1160 | } |
| 1161 | |
| 1162 | /// Determine whether this class describes a generic |
| 1163 | /// lambda function object (i.e. function call operator is |
| 1164 | /// a template). |
| 1165 | bool isGenericLambda() const; |
| 1166 | |
| 1167 | /// Determine whether this lambda should have an implicit default constructor |
| 1168 | /// and copy and move assignment operators. |
| 1169 | bool lambdaIsDefaultConstructibleAndAssignable() const; |
| 1170 | |
| 1171 | /// Retrieve the lambda call operator of the closure type |
| 1172 | /// if this is a closure type. |
| 1173 | CXXMethodDecl *getLambdaCallOperator() const; |
| 1174 | |
| 1175 | /// Retrieve the dependent lambda call operator of the closure type |
| 1176 | /// if this is a templated closure type. |
| 1177 | FunctionTemplateDecl *getDependentLambdaCallOperator() const; |
| 1178 | |
| 1179 | /// Retrieve the lambda static invoker, the address of which |
| 1180 | /// is returned by the conversion operator, and the body of which |
| 1181 | /// is forwarded to the lambda call operator. |
| 1182 | CXXMethodDecl *getLambdaStaticInvoker() const; |
| 1183 | |
| 1184 | /// Retrieve the generic lambda's template parameter list. |
| 1185 | /// Returns null if the class does not represent a lambda or a generic |
| 1186 | /// lambda. |
| 1187 | TemplateParameterList *getGenericLambdaTemplateParameterList() const; |
| 1188 | |
| 1189 | /// Retrieve the lambda template parameters that were specified explicitly. |
| 1190 | ArrayRef<NamedDecl *> getLambdaExplicitTemplateParameters() const; |
| 1191 | |
| 1192 | LambdaCaptureDefault getLambdaCaptureDefault() const { |
| 1193 | assert(isLambda())((isLambda()) ? static_cast<void> (0) : __assert_fail ( "isLambda()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1193, __PRETTY_FUNCTION__)); |
| 1194 | return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault); |
| 1195 | } |
| 1196 | |
| 1197 | /// For a closure type, retrieve the mapping from captured |
| 1198 | /// variables and \c this to the non-static data members that store the |
| 1199 | /// values or references of the captures. |
| 1200 | /// |
| 1201 | /// \param Captures Will be populated with the mapping from captured |
| 1202 | /// variables to the corresponding fields. |
| 1203 | /// |
| 1204 | /// \param ThisCapture Will be set to the field declaration for the |
| 1205 | /// \c this capture. |
| 1206 | /// |
| 1207 | /// \note No entries will be added for init-captures, as they do not capture |
| 1208 | /// variables. |
| 1209 | void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures, |
| 1210 | FieldDecl *&ThisCapture) const; |
| 1211 | |
| 1212 | using capture_const_iterator = const LambdaCapture *; |
| 1213 | using capture_const_range = llvm::iterator_range<capture_const_iterator>; |
| 1214 | |
| 1215 | capture_const_range captures() const { |
| 1216 | return capture_const_range(captures_begin(), captures_end()); |
| 1217 | } |
| 1218 | |
| 1219 | capture_const_iterator captures_begin() const { |
| 1220 | return isLambda() ? getLambdaData().Captures : nullptr; |
| 1221 | } |
| 1222 | |
| 1223 | capture_const_iterator captures_end() const { |
| 1224 | return isLambda() ? captures_begin() + getLambdaData().NumCaptures |
| 1225 | : nullptr; |
| 1226 | } |
| 1227 | |
| 1228 | using conversion_iterator = UnresolvedSetIterator; |
| 1229 | |
| 1230 | conversion_iterator conversion_begin() const { |
| 1231 | return data().Conversions.get(getASTContext()).begin(); |
| 1232 | } |
| 1233 | |
| 1234 | conversion_iterator conversion_end() const { |
| 1235 | return data().Conversions.get(getASTContext()).end(); |
| 1236 | } |
| 1237 | |
| 1238 | /// Removes a conversion function from this class. The conversion |
| 1239 | /// function must currently be a member of this class. Furthermore, |
| 1240 | /// this class must currently be in the process of being defined. |
| 1241 | void removeConversion(const NamedDecl *Old); |
| 1242 | |
| 1243 | /// Get all conversion functions visible in current class, |
| 1244 | /// including conversion function templates. |
| 1245 | llvm::iterator_range<conversion_iterator> getVisibleConversionFunctions(); |
| 1246 | |
| 1247 | /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]), |
| 1248 | /// which is a class with no user-declared constructors, no private |
| 1249 | /// or protected non-static data members, no base classes, and no virtual |
| 1250 | /// functions (C++ [dcl.init.aggr]p1). |
| 1251 | bool isAggregate() const { return data().Aggregate; } |
| 1252 | |
| 1253 | /// Whether this class has any in-class initializers |
| 1254 | /// for non-static data members (including those in anonymous unions or |
| 1255 | /// structs). |
| 1256 | bool hasInClassInitializer() const { return data().HasInClassInitializer; } |
| 1257 | |
| 1258 | /// Whether this class or any of its subobjects has any members of |
| 1259 | /// reference type which would make value-initialization ill-formed. |
| 1260 | /// |
| 1261 | /// Per C++03 [dcl.init]p5: |
| 1262 | /// - if T is a non-union class type without a user-declared constructor, |
| 1263 | /// then every non-static data member and base-class component of T is |
| 1264 | /// value-initialized [...] A program that calls for [...] |
| 1265 | /// value-initialization of an entity of reference type is ill-formed. |
| 1266 | bool hasUninitializedReferenceMember() const { |
| 1267 | return !isUnion() && !hasUserDeclaredConstructor() && |
| 1268 | data().HasUninitializedReferenceMember; |
| 1269 | } |
| 1270 | |
| 1271 | /// Whether this class is a POD-type (C++ [class]p4) |
| 1272 | /// |
| 1273 | /// For purposes of this function a class is POD if it is an aggregate |
| 1274 | /// that has no non-static non-POD data members, no reference data |
| 1275 | /// members, no user-defined copy assignment operator and no |
| 1276 | /// user-defined destructor. |
| 1277 | /// |
| 1278 | /// Note that this is the C++ TR1 definition of POD. |
| 1279 | bool isPOD() const { return data().PlainOldData; } |
| 1280 | |
| 1281 | /// True if this class is C-like, without C++-specific features, e.g. |
| 1282 | /// it contains only public fields, no bases, tag kind is not 'class', etc. |
| 1283 | bool isCLike() const; |
| 1284 | |
| 1285 | /// Determine whether this is an empty class in the sense of |
| 1286 | /// (C++11 [meta.unary.prop]). |
| 1287 | /// |
| 1288 | /// The CXXRecordDecl is a class type, but not a union type, |
| 1289 | /// with no non-static data members other than bit-fields of length 0, |
| 1290 | /// no virtual member functions, no virtual base classes, |
| 1291 | /// and no base class B for which is_empty<B>::value is false. |
| 1292 | /// |
| 1293 | /// \note This does NOT include a check for union-ness. |
| 1294 | bool isEmpty() const { return data().Empty; } |
| 1295 | |
| 1296 | bool hasPrivateFields() const { |
| 1297 | return data().HasPrivateFields; |
| 1298 | } |
| 1299 | |
| 1300 | bool hasProtectedFields() const { |
| 1301 | return data().HasProtectedFields; |
| 1302 | } |
| 1303 | |
| 1304 | /// Determine whether this class has direct non-static data members. |
| 1305 | bool hasDirectFields() const { |
| 1306 | auto &D = data(); |
| 1307 | return D.HasPublicFields || D.HasProtectedFields || D.HasPrivateFields; |
| 1308 | } |
| 1309 | |
| 1310 | /// Whether this class is polymorphic (C++ [class.virtual]), |
| 1311 | /// which means that the class contains or inherits a virtual function. |
| 1312 | bool isPolymorphic() const { return data().Polymorphic; } |
| 1313 | |
| 1314 | /// Determine whether this class has a pure virtual function. |
| 1315 | /// |
| 1316 | /// The class is is abstract per (C++ [class.abstract]p2) if it declares |
| 1317 | /// a pure virtual function or inherits a pure virtual function that is |
| 1318 | /// not overridden. |
| 1319 | bool isAbstract() const { return data().Abstract; } |
| 1320 | |
| 1321 | /// Determine whether this class is standard-layout per |
| 1322 | /// C++ [class]p7. |
| 1323 | bool isStandardLayout() const { return data().IsStandardLayout; } |
| 1324 | |
| 1325 | /// Determine whether this class was standard-layout per |
| 1326 | /// C++11 [class]p7, specifically using the C++11 rules without any DRs. |
| 1327 | bool isCXX11StandardLayout() const { return data().IsCXX11StandardLayout; } |
| 1328 | |
| 1329 | /// Determine whether this class, or any of its class subobjects, |
| 1330 | /// contains a mutable field. |
| 1331 | bool hasMutableFields() const { return data().HasMutableFields; } |
| 1332 | |
| 1333 | /// Determine whether this class has any variant members. |
| 1334 | bool hasVariantMembers() const { return data().HasVariantMembers; } |
| 1335 | |
| 1336 | /// Determine whether this class has a trivial default constructor |
| 1337 | /// (C++11 [class.ctor]p5). |
| 1338 | bool hasTrivialDefaultConstructor() const { |
| 1339 | return hasDefaultConstructor() && |
| 1340 | (data().HasTrivialSpecialMembers & SMF_DefaultConstructor); |
| 1341 | } |
| 1342 | |
| 1343 | /// Determine whether this class has a non-trivial default constructor |
| 1344 | /// (C++11 [class.ctor]p5). |
| 1345 | bool hasNonTrivialDefaultConstructor() const { |
| 1346 | return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) || |
| 1347 | (needsImplicitDefaultConstructor() && |
| 1348 | !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor)); |
| 1349 | } |
| 1350 | |
| 1351 | /// Determine whether this class has at least one constexpr constructor |
| 1352 | /// other than the copy or move constructors. |
| 1353 | bool hasConstexprNonCopyMoveConstructor() const { |
| 1354 | return data().HasConstexprNonCopyMoveConstructor || |
| 1355 | (needsImplicitDefaultConstructor() && |
| 1356 | defaultedDefaultConstructorIsConstexpr()); |
| 1357 | } |
| 1358 | |
| 1359 | /// Determine whether a defaulted default constructor for this class |
| 1360 | /// would be constexpr. |
| 1361 | bool defaultedDefaultConstructorIsConstexpr() const { |
| 1362 | return data().DefaultedDefaultConstructorIsConstexpr && |
| 1363 | (!isUnion() || hasInClassInitializer() || !hasVariantMembers() || |
| 1364 | getASTContext().getLangOpts().CPlusPlus2a); |
| 1365 | } |
| 1366 | |
| 1367 | /// Determine whether this class has a constexpr default constructor. |
| 1368 | bool hasConstexprDefaultConstructor() const { |
| 1369 | return data().HasConstexprDefaultConstructor || |
| 1370 | (needsImplicitDefaultConstructor() && |
| 1371 | defaultedDefaultConstructorIsConstexpr()); |
| 1372 | } |
| 1373 | |
| 1374 | /// Determine whether this class has a trivial copy constructor |
| 1375 | /// (C++ [class.copy]p6, C++11 [class.copy]p12) |
| 1376 | bool hasTrivialCopyConstructor() const { |
| 1377 | return data().HasTrivialSpecialMembers & SMF_CopyConstructor; |
| 1378 | } |
| 1379 | |
| 1380 | bool hasTrivialCopyConstructorForCall() const { |
| 1381 | return data().HasTrivialSpecialMembersForCall & SMF_CopyConstructor; |
| 1382 | } |
| 1383 | |
| 1384 | /// Determine whether this class has a non-trivial copy constructor |
| 1385 | /// (C++ [class.copy]p6, C++11 [class.copy]p12) |
| 1386 | bool hasNonTrivialCopyConstructor() const { |
| 1387 | return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor || |
| 1388 | !hasTrivialCopyConstructor(); |
| 1389 | } |
| 1390 | |
| 1391 | bool hasNonTrivialCopyConstructorForCall() const { |
| 1392 | return (data().DeclaredNonTrivialSpecialMembersForCall & |
| 1393 | SMF_CopyConstructor) || |
| 1394 | !hasTrivialCopyConstructorForCall(); |
| 1395 | } |
| 1396 | |
| 1397 | /// Determine whether this class has a trivial move constructor |
| 1398 | /// (C++11 [class.copy]p12) |
| 1399 | bool hasTrivialMoveConstructor() const { |
| 1400 | return hasMoveConstructor() && |
| 1401 | (data().HasTrivialSpecialMembers & SMF_MoveConstructor); |
| 1402 | } |
| 1403 | |
| 1404 | bool hasTrivialMoveConstructorForCall() const { |
| 1405 | return hasMoveConstructor() && |
| 1406 | (data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor); |
| 1407 | } |
| 1408 | |
| 1409 | /// Determine whether this class has a non-trivial move constructor |
| 1410 | /// (C++11 [class.copy]p12) |
| 1411 | bool hasNonTrivialMoveConstructor() const { |
| 1412 | return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) || |
| 1413 | (needsImplicitMoveConstructor() && |
| 1414 | !(data().HasTrivialSpecialMembers & SMF_MoveConstructor)); |
| 1415 | } |
| 1416 | |
| 1417 | bool hasNonTrivialMoveConstructorForCall() const { |
| 1418 | return (data().DeclaredNonTrivialSpecialMembersForCall & |
| 1419 | SMF_MoveConstructor) || |
| 1420 | (needsImplicitMoveConstructor() && |
| 1421 | !(data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor)); |
| 1422 | } |
| 1423 | |
| 1424 | /// Determine whether this class has a trivial copy assignment operator |
| 1425 | /// (C++ [class.copy]p11, C++11 [class.copy]p25) |
| 1426 | bool hasTrivialCopyAssignment() const { |
| 1427 | return data().HasTrivialSpecialMembers & SMF_CopyAssignment; |
| 1428 | } |
| 1429 | |
| 1430 | /// Determine whether this class has a non-trivial copy assignment |
| 1431 | /// operator (C++ [class.copy]p11, C++11 [class.copy]p25) |
| 1432 | bool hasNonTrivialCopyAssignment() const { |
| 1433 | return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment || |
| 1434 | !hasTrivialCopyAssignment(); |
| 1435 | } |
| 1436 | |
| 1437 | /// Determine whether this class has a trivial move assignment operator |
| 1438 | /// (C++11 [class.copy]p25) |
| 1439 | bool hasTrivialMoveAssignment() const { |
| 1440 | return hasMoveAssignment() && |
| 1441 | (data().HasTrivialSpecialMembers & SMF_MoveAssignment); |
| 1442 | } |
| 1443 | |
| 1444 | /// Determine whether this class has a non-trivial move assignment |
| 1445 | /// operator (C++11 [class.copy]p25) |
| 1446 | bool hasNonTrivialMoveAssignment() const { |
| 1447 | return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) || |
| 1448 | (needsImplicitMoveAssignment() && |
| 1449 | !(data().HasTrivialSpecialMembers & SMF_MoveAssignment)); |
| 1450 | } |
| 1451 | |
| 1452 | /// Determine whether a defaulted default constructor for this class |
| 1453 | /// would be constexpr. |
| 1454 | bool defaultedDestructorIsConstexpr() const { |
| 1455 | return data().DefaultedDestructorIsConstexpr && |
| 1456 | getASTContext().getLangOpts().CPlusPlus2a; |
| 1457 | } |
| 1458 | |
| 1459 | /// Determine whether this class has a constexpr destructor. |
| 1460 | bool hasConstexprDestructor() const; |
| 1461 | |
| 1462 | /// Determine whether this class has a trivial destructor |
| 1463 | /// (C++ [class.dtor]p3) |
| 1464 | bool hasTrivialDestructor() const { |
| 1465 | return data().HasTrivialSpecialMembers & SMF_Destructor; |
| 1466 | } |
| 1467 | |
| 1468 | bool hasTrivialDestructorForCall() const { |
| 1469 | return data().HasTrivialSpecialMembersForCall & SMF_Destructor; |
| 1470 | } |
| 1471 | |
| 1472 | /// Determine whether this class has a non-trivial destructor |
| 1473 | /// (C++ [class.dtor]p3) |
| 1474 | bool hasNonTrivialDestructor() const { |
| 1475 | return !(data().HasTrivialSpecialMembers & SMF_Destructor); |
| 1476 | } |
| 1477 | |
| 1478 | bool hasNonTrivialDestructorForCall() const { |
| 1479 | return !(data().HasTrivialSpecialMembersForCall & SMF_Destructor); |
| 1480 | } |
| 1481 | |
| 1482 | void setHasTrivialSpecialMemberForCall() { |
| 1483 | data().HasTrivialSpecialMembersForCall = |
| 1484 | (SMF_CopyConstructor | SMF_MoveConstructor | SMF_Destructor); |
| 1485 | } |
| 1486 | |
| 1487 | /// Determine whether declaring a const variable with this type is ok |
| 1488 | /// per core issue 253. |
| 1489 | bool allowConstDefaultInit() const { |
| 1490 | return !data().HasUninitializedFields || |
| 1491 | !(data().HasDefaultedDefaultConstructor || |
| 1492 | needsImplicitDefaultConstructor()); |
| 1493 | } |
| 1494 | |
| 1495 | /// Determine whether this class has a destructor which has no |
| 1496 | /// semantic effect. |
| 1497 | /// |
| 1498 | /// Any such destructor will be trivial, public, defaulted and not deleted, |
| 1499 | /// and will call only irrelevant destructors. |
| 1500 | bool hasIrrelevantDestructor() const { |
| 1501 | return data().HasIrrelevantDestructor; |
| 1502 | } |
| 1503 | |
| 1504 | /// Determine whether this class has a non-literal or/ volatile type |
| 1505 | /// non-static data member or base class. |
| 1506 | bool hasNonLiteralTypeFieldsOrBases() const { |
| 1507 | return data().HasNonLiteralTypeFieldsOrBases; |
| 1508 | } |
| 1509 | |
| 1510 | /// Determine whether this class has a using-declaration that names |
| 1511 | /// a user-declared base class constructor. |
| 1512 | bool hasInheritedConstructor() const { |
| 1513 | return data().HasInheritedConstructor; |
| 1514 | } |
| 1515 | |
| 1516 | /// Determine whether this class has a using-declaration that names |
| 1517 | /// a base class assignment operator. |
| 1518 | bool hasInheritedAssignment() const { |
| 1519 | return data().HasInheritedAssignment; |
| 1520 | } |
| 1521 | |
| 1522 | /// Determine whether this class is considered trivially copyable per |
| 1523 | /// (C++11 [class]p6). |
| 1524 | bool isTriviallyCopyable() const; |
| 1525 | |
| 1526 | /// Determine whether this class is considered trivial. |
| 1527 | /// |
| 1528 | /// C++11 [class]p6: |
| 1529 | /// "A trivial class is a class that has a trivial default constructor and |
| 1530 | /// is trivially copyable." |
| 1531 | bool isTrivial() const { |
| 1532 | return isTriviallyCopyable() && hasTrivialDefaultConstructor(); |
| 1533 | } |
| 1534 | |
| 1535 | /// Determine whether this class is a literal type. |
| 1536 | /// |
| 1537 | /// C++11 [basic.types]p10: |
| 1538 | /// A class type that has all the following properties: |
| 1539 | /// - it has a trivial destructor |
| 1540 | /// - every constructor call and full-expression in the |
| 1541 | /// brace-or-equal-intializers for non-static data members (if any) is |
| 1542 | /// a constant expression. |
| 1543 | /// - it is an aggregate type or has at least one constexpr constructor |
| 1544 | /// or constructor template that is not a copy or move constructor, and |
| 1545 | /// - all of its non-static data members and base classes are of literal |
| 1546 | /// types |
| 1547 | /// |
| 1548 | /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by |
| 1549 | /// treating types with trivial default constructors as literal types. |
| 1550 | /// |
| 1551 | /// Only in C++17 and beyond, are lambdas literal types. |
| 1552 | bool isLiteral() const { |
| 1553 | ASTContext &Ctx = getASTContext(); |
| 1554 | return (Ctx.getLangOpts().CPlusPlus2a ? hasConstexprDestructor() |
| 1555 | : hasTrivialDestructor()) && |
| 1556 | (!isLambda() || Ctx.getLangOpts().CPlusPlus17) && |
| 1557 | !hasNonLiteralTypeFieldsOrBases() && |
| 1558 | (isAggregate() || isLambda() || |
| 1559 | hasConstexprNonCopyMoveConstructor() || |
| 1560 | hasTrivialDefaultConstructor()); |
| 1561 | } |
| 1562 | |
| 1563 | /// If this record is an instantiation of a member class, |
| 1564 | /// retrieves the member class from which it was instantiated. |
| 1565 | /// |
| 1566 | /// This routine will return non-null for (non-templated) member |
| 1567 | /// classes of class templates. For example, given: |
| 1568 | /// |
| 1569 | /// \code |
| 1570 | /// template<typename T> |
| 1571 | /// struct X { |
| 1572 | /// struct A { }; |
| 1573 | /// }; |
| 1574 | /// \endcode |
| 1575 | /// |
| 1576 | /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl |
| 1577 | /// whose parent is the class template specialization X<int>. For |
| 1578 | /// this declaration, getInstantiatedFromMemberClass() will return |
| 1579 | /// the CXXRecordDecl X<T>::A. When a complete definition of |
| 1580 | /// X<int>::A is required, it will be instantiated from the |
| 1581 | /// declaration returned by getInstantiatedFromMemberClass(). |
| 1582 | CXXRecordDecl *getInstantiatedFromMemberClass() const; |
| 1583 | |
| 1584 | /// If this class is an instantiation of a member class of a |
| 1585 | /// class template specialization, retrieves the member specialization |
| 1586 | /// information. |
| 1587 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
| 1588 | |
| 1589 | /// Specify that this record is an instantiation of the |
| 1590 | /// member class \p RD. |
| 1591 | void setInstantiationOfMemberClass(CXXRecordDecl *RD, |
| 1592 | TemplateSpecializationKind TSK); |
| 1593 | |
| 1594 | /// Retrieves the class template that is described by this |
| 1595 | /// class declaration. |
| 1596 | /// |
| 1597 | /// Every class template is represented as a ClassTemplateDecl and a |
| 1598 | /// CXXRecordDecl. The former contains template properties (such as |
| 1599 | /// the template parameter lists) while the latter contains the |
| 1600 | /// actual description of the template's |
| 1601 | /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the |
| 1602 | /// CXXRecordDecl that from a ClassTemplateDecl, while |
| 1603 | /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from |
| 1604 | /// a CXXRecordDecl. |
| 1605 | ClassTemplateDecl *getDescribedClassTemplate() const; |
| 1606 | |
| 1607 | void setDescribedClassTemplate(ClassTemplateDecl *Template); |
| 1608 | |
| 1609 | /// Determine whether this particular class is a specialization or |
| 1610 | /// instantiation of a class template or member class of a class template, |
| 1611 | /// and how it was instantiated or specialized. |
| 1612 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
| 1613 | |
| 1614 | /// Set the kind of specialization or template instantiation this is. |
| 1615 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK); |
| 1616 | |
| 1617 | /// Retrieve the record declaration from which this record could be |
| 1618 | /// instantiated. Returns null if this class is not a template instantiation. |
| 1619 | const CXXRecordDecl *getTemplateInstantiationPattern() const; |
| 1620 | |
| 1621 | CXXRecordDecl *getTemplateInstantiationPattern() { |
| 1622 | return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this) |
| 1623 | ->getTemplateInstantiationPattern()); |
| 1624 | } |
| 1625 | |
| 1626 | /// Returns the destructor decl for this class. |
| 1627 | CXXDestructorDecl *getDestructor() const; |
| 1628 | |
| 1629 | /// Returns true if the class destructor, or any implicitly invoked |
| 1630 | /// destructors are marked noreturn. |
| 1631 | bool isAnyDestructorNoReturn() const; |
| 1632 | |
| 1633 | /// If the class is a local class [class.local], returns |
| 1634 | /// the enclosing function declaration. |
| 1635 | const FunctionDecl *isLocalClass() const { |
| 1636 | if (const auto *RD = dyn_cast<CXXRecordDecl>(getDeclContext())) |
| 1637 | return RD->isLocalClass(); |
| 1638 | |
| 1639 | return dyn_cast<FunctionDecl>(getDeclContext()); |
| 1640 | } |
| 1641 | |
| 1642 | FunctionDecl *isLocalClass() { |
| 1643 | return const_cast<FunctionDecl*>( |
| 1644 | const_cast<const CXXRecordDecl*>(this)->isLocalClass()); |
| 1645 | } |
| 1646 | |
| 1647 | /// Determine whether this dependent class is a current instantiation, |
| 1648 | /// when viewed from within the given context. |
| 1649 | bool isCurrentInstantiation(const DeclContext *CurContext) const; |
| 1650 | |
| 1651 | /// Determine whether this class is derived from the class \p Base. |
| 1652 | /// |
| 1653 | /// This routine only determines whether this class is derived from \p Base, |
| 1654 | /// but does not account for factors that may make a Derived -> Base class |
| 1655 | /// ill-formed, such as private/protected inheritance or multiple, ambiguous |
| 1656 | /// base class subobjects. |
| 1657 | /// |
| 1658 | /// \param Base the base class we are searching for. |
| 1659 | /// |
| 1660 | /// \returns true if this class is derived from Base, false otherwise. |
| 1661 | bool isDerivedFrom(const CXXRecordDecl *Base) const; |
| 1662 | |
| 1663 | /// Determine whether this class is derived from the type \p Base. |
| 1664 | /// |
| 1665 | /// This routine only determines whether this class is derived from \p Base, |
| 1666 | /// but does not account for factors that may make a Derived -> Base class |
| 1667 | /// ill-formed, such as private/protected inheritance or multiple, ambiguous |
| 1668 | /// base class subobjects. |
| 1669 | /// |
| 1670 | /// \param Base the base class we are searching for. |
| 1671 | /// |
| 1672 | /// \param Paths will contain the paths taken from the current class to the |
| 1673 | /// given \p Base class. |
| 1674 | /// |
| 1675 | /// \returns true if this class is derived from \p Base, false otherwise. |
| 1676 | /// |
| 1677 | /// \todo add a separate parameter to configure IsDerivedFrom, rather than |
| 1678 | /// tangling input and output in \p Paths |
| 1679 | bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const; |
| 1680 | |
| 1681 | /// Determine whether this class is virtually derived from |
| 1682 | /// the class \p Base. |
| 1683 | /// |
| 1684 | /// This routine only determines whether this class is virtually |
| 1685 | /// derived from \p Base, but does not account for factors that may |
| 1686 | /// make a Derived -> Base class ill-formed, such as |
| 1687 | /// private/protected inheritance or multiple, ambiguous base class |
| 1688 | /// subobjects. |
| 1689 | /// |
| 1690 | /// \param Base the base class we are searching for. |
| 1691 | /// |
| 1692 | /// \returns true if this class is virtually derived from Base, |
| 1693 | /// false otherwise. |
| 1694 | bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const; |
| 1695 | |
| 1696 | /// Determine whether this class is provably not derived from |
| 1697 | /// the type \p Base. |
| 1698 | bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const; |
| 1699 | |
| 1700 | /// Function type used by forallBases() as a callback. |
| 1701 | /// |
| 1702 | /// \param BaseDefinition the definition of the base class |
| 1703 | /// |
| 1704 | /// \returns true if this base matched the search criteria |
| 1705 | using ForallBasesCallback = |
| 1706 | llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)>; |
| 1707 | |
| 1708 | /// Determines if the given callback holds for all the direct |
| 1709 | /// or indirect base classes of this type. |
| 1710 | /// |
| 1711 | /// The class itself does not count as a base class. This routine |
| 1712 | /// returns false if the class has non-computable base classes. |
| 1713 | /// |
| 1714 | /// \param BaseMatches Callback invoked for each (direct or indirect) base |
| 1715 | /// class of this type, or if \p AllowShortCircuit is true then until a call |
| 1716 | /// returns false. |
| 1717 | /// |
| 1718 | /// \param AllowShortCircuit if false, forces the callback to be called |
| 1719 | /// for every base class, even if a dependent or non-matching base was |
| 1720 | /// found. |
| 1721 | bool forallBases(ForallBasesCallback BaseMatches, |
| 1722 | bool AllowShortCircuit = true) const; |
| 1723 | |
| 1724 | /// Function type used by lookupInBases() to determine whether a |
| 1725 | /// specific base class subobject matches the lookup criteria. |
| 1726 | /// |
| 1727 | /// \param Specifier the base-class specifier that describes the inheritance |
| 1728 | /// from the base class we are trying to match. |
| 1729 | /// |
| 1730 | /// \param Path the current path, from the most-derived class down to the |
| 1731 | /// base named by the \p Specifier. |
| 1732 | /// |
| 1733 | /// \returns true if this base matched the search criteria, false otherwise. |
| 1734 | using BaseMatchesCallback = |
| 1735 | llvm::function_ref<bool(const CXXBaseSpecifier *Specifier, |
| 1736 | CXXBasePath &Path)>; |
| 1737 | |
| 1738 | /// Look for entities within the base classes of this C++ class, |
| 1739 | /// transitively searching all base class subobjects. |
| 1740 | /// |
| 1741 | /// This routine uses the callback function \p BaseMatches to find base |
| 1742 | /// classes meeting some search criteria, walking all base class subobjects |
| 1743 | /// and populating the given \p Paths structure with the paths through the |
| 1744 | /// inheritance hierarchy that resulted in a match. On a successful search, |
| 1745 | /// the \p Paths structure can be queried to retrieve the matching paths and |
| 1746 | /// to determine if there were any ambiguities. |
| 1747 | /// |
| 1748 | /// \param BaseMatches callback function used to determine whether a given |
| 1749 | /// base matches the user-defined search criteria. |
| 1750 | /// |
| 1751 | /// \param Paths used to record the paths from this class to its base class |
| 1752 | /// subobjects that match the search criteria. |
| 1753 | /// |
| 1754 | /// \param LookupInDependent can be set to true to extend the search to |
| 1755 | /// dependent base classes. |
| 1756 | /// |
| 1757 | /// \returns true if there exists any path from this class to a base class |
| 1758 | /// subobject that matches the search criteria. |
| 1759 | bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths, |
| 1760 | bool LookupInDependent = false) const; |
| 1761 | |
| 1762 | /// Base-class lookup callback that determines whether the given |
| 1763 | /// base class specifier refers to a specific class declaration. |
| 1764 | /// |
| 1765 | /// This callback can be used with \c lookupInBases() to determine whether |
| 1766 | /// a given derived class has is a base class subobject of a particular type. |
| 1767 | /// The base record pointer should refer to the canonical CXXRecordDecl of the |
| 1768 | /// base class that we are searching for. |
| 1769 | static bool FindBaseClass(const CXXBaseSpecifier *Specifier, |
| 1770 | CXXBasePath &Path, const CXXRecordDecl *BaseRecord); |
| 1771 | |
| 1772 | /// Base-class lookup callback that determines whether the |
| 1773 | /// given base class specifier refers to a specific class |
| 1774 | /// declaration and describes virtual derivation. |
| 1775 | /// |
| 1776 | /// This callback can be used with \c lookupInBases() to determine |
| 1777 | /// whether a given derived class has is a virtual base class |
| 1778 | /// subobject of a particular type. The base record pointer should |
| 1779 | /// refer to the canonical CXXRecordDecl of the base class that we |
| 1780 | /// are searching for. |
| 1781 | static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier, |
| 1782 | CXXBasePath &Path, |
| 1783 | const CXXRecordDecl *BaseRecord); |
| 1784 | |
| 1785 | /// Base-class lookup callback that determines whether there exists |
| 1786 | /// a tag with the given name. |
| 1787 | /// |
| 1788 | /// This callback can be used with \c lookupInBases() to find tag members |
| 1789 | /// of the given name within a C++ class hierarchy. |
| 1790 | static bool FindTagMember(const CXXBaseSpecifier *Specifier, |
| 1791 | CXXBasePath &Path, DeclarationName Name); |
| 1792 | |
| 1793 | /// Base-class lookup callback that determines whether there exists |
| 1794 | /// a member with the given name. |
| 1795 | /// |
| 1796 | /// This callback can be used with \c lookupInBases() to find members |
| 1797 | /// of the given name within a C++ class hierarchy. |
| 1798 | static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier, |
| 1799 | CXXBasePath &Path, DeclarationName Name); |
| 1800 | |
| 1801 | /// Base-class lookup callback that determines whether there exists |
| 1802 | /// a member with the given name. |
| 1803 | /// |
| 1804 | /// This callback can be used with \c lookupInBases() to find members |
| 1805 | /// of the given name within a C++ class hierarchy, including dependent |
| 1806 | /// classes. |
| 1807 | static bool |
| 1808 | FindOrdinaryMemberInDependentClasses(const CXXBaseSpecifier *Specifier, |
| 1809 | CXXBasePath &Path, DeclarationName Name); |
| 1810 | |
| 1811 | /// Base-class lookup callback that determines whether there exists |
| 1812 | /// an OpenMP declare reduction member with the given name. |
| 1813 | /// |
| 1814 | /// This callback can be used with \c lookupInBases() to find members |
| 1815 | /// of the given name within a C++ class hierarchy. |
| 1816 | static bool FindOMPReductionMember(const CXXBaseSpecifier *Specifier, |
| 1817 | CXXBasePath &Path, DeclarationName Name); |
| 1818 | |
| 1819 | /// Base-class lookup callback that determines whether there exists |
| 1820 | /// an OpenMP declare mapper member with the given name. |
| 1821 | /// |
| 1822 | /// This callback can be used with \c lookupInBases() to find members |
| 1823 | /// of the given name within a C++ class hierarchy. |
| 1824 | static bool FindOMPMapperMember(const CXXBaseSpecifier *Specifier, |
| 1825 | CXXBasePath &Path, DeclarationName Name); |
| 1826 | |
| 1827 | /// Base-class lookup callback that determines whether there exists |
| 1828 | /// a member with the given name that can be used in a nested-name-specifier. |
| 1829 | /// |
| 1830 | /// This callback can be used with \c lookupInBases() to find members of |
| 1831 | /// the given name within a C++ class hierarchy that can occur within |
| 1832 | /// nested-name-specifiers. |
| 1833 | static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier, |
| 1834 | CXXBasePath &Path, |
| 1835 | DeclarationName Name); |
| 1836 | |
| 1837 | /// Retrieve the final overriders for each virtual member |
| 1838 | /// function in the class hierarchy where this class is the |
| 1839 | /// most-derived class in the class hierarchy. |
| 1840 | void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const; |
| 1841 | |
| 1842 | /// Get the indirect primary bases for this class. |
| 1843 | void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const; |
| 1844 | |
| 1845 | /// Performs an imprecise lookup of a dependent name in this class. |
| 1846 | /// |
| 1847 | /// This function does not follow strict semantic rules and should be used |
| 1848 | /// only when lookup rules can be relaxed, e.g. indexing. |
| 1849 | std::vector<const NamedDecl *> |
| 1850 | lookupDependentName(const DeclarationName &Name, |
| 1851 | llvm::function_ref<bool(const NamedDecl *ND)> Filter); |
| 1852 | |
| 1853 | /// Renders and displays an inheritance diagram |
| 1854 | /// for this C++ class and all of its base classes (transitively) using |
| 1855 | /// GraphViz. |
| 1856 | void viewInheritance(ASTContext& Context) const; |
| 1857 | |
| 1858 | /// Calculates the access of a decl that is reached |
| 1859 | /// along a path. |
| 1860 | static AccessSpecifier MergeAccess(AccessSpecifier PathAccess, |
| 1861 | AccessSpecifier DeclAccess) { |
| 1862 | assert(DeclAccess != AS_none)((DeclAccess != AS_none) ? static_cast<void> (0) : __assert_fail ("DeclAccess != AS_none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1862, __PRETTY_FUNCTION__)); |
| 1863 | if (DeclAccess == AS_private) return AS_none; |
| 1864 | return (PathAccess > DeclAccess ? PathAccess : DeclAccess); |
| 1865 | } |
| 1866 | |
| 1867 | /// Indicates that the declaration of a defaulted or deleted special |
| 1868 | /// member function is now complete. |
| 1869 | void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD); |
| 1870 | |
| 1871 | void setTrivialForCallFlags(CXXMethodDecl *MD); |
| 1872 | |
| 1873 | /// Indicates that the definition of this class is now complete. |
| 1874 | void completeDefinition() override; |
| 1875 | |
| 1876 | /// Indicates that the definition of this class is now complete, |
| 1877 | /// and provides a final overrider map to help determine |
| 1878 | /// |
| 1879 | /// \param FinalOverriders The final overrider map for this class, which can |
| 1880 | /// be provided as an optimization for abstract-class checking. If NULL, |
| 1881 | /// final overriders will be computed if they are needed to complete the |
| 1882 | /// definition. |
| 1883 | void completeDefinition(CXXFinalOverriderMap *FinalOverriders); |
| 1884 | |
| 1885 | /// Determine whether this class may end up being abstract, even though |
| 1886 | /// it is not yet known to be abstract. |
| 1887 | /// |
| 1888 | /// \returns true if this class is not known to be abstract but has any |
| 1889 | /// base classes that are abstract. In this case, \c completeDefinition() |
| 1890 | /// will need to compute final overriders to determine whether the class is |
| 1891 | /// actually abstract. |
| 1892 | bool mayBeAbstract() const; |
| 1893 | |
| 1894 | /// If this is the closure type of a lambda expression, retrieve the |
| 1895 | /// number to be used for name mangling in the Itanium C++ ABI. |
| 1896 | /// |
| 1897 | /// Zero indicates that this closure type has internal linkage, so the |
| 1898 | /// mangling number does not matter, while a non-zero value indicates which |
| 1899 | /// lambda expression this is in this particular context. |
| 1900 | unsigned getLambdaManglingNumber() const { |
| 1901 | assert(isLambda() && "Not a lambda closure type!")((isLambda() && "Not a lambda closure type!") ? static_cast <void> (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 1901, __PRETTY_FUNCTION__)); |
| 1902 | return getLambdaData().ManglingNumber; |
| 1903 | } |
| 1904 | |
| 1905 | /// Retrieve the declaration that provides additional context for a |
| 1906 | /// lambda, when the normal declaration context is not specific enough. |
| 1907 | /// |
| 1908 | /// Certain contexts (default arguments of in-class function parameters and |
| 1909 | /// the initializers of data members) have separate name mangling rules for |
| 1910 | /// lambdas within the Itanium C++ ABI. For these cases, this routine provides |
| 1911 | /// the declaration in which the lambda occurs, e.g., the function parameter |
| 1912 | /// or the non-static data member. Otherwise, it returns NULL to imply that |
| 1913 | /// the declaration context suffices. |
| 1914 | Decl *getLambdaContextDecl() const; |
| 1915 | |
| 1916 | /// Set the mangling number and context declaration for a lambda |
| 1917 | /// class. |
| 1918 | void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) { |
| 1919 | getLambdaData().ManglingNumber = ManglingNumber; |
| 1920 | getLambdaData().ContextDecl = ContextDecl; |
| 1921 | } |
| 1922 | |
| 1923 | /// Returns the inheritance model used for this record. |
| 1924 | MSInheritanceAttr::Spelling getMSInheritanceModel() const; |
| 1925 | |
| 1926 | /// Calculate what the inheritance model would be for this class. |
| 1927 | MSInheritanceAttr::Spelling calculateInheritanceModel() const; |
| 1928 | |
| 1929 | /// In the Microsoft C++ ABI, use zero for the field offset of a null data |
| 1930 | /// member pointer if we can guarantee that zero is not a valid field offset, |
| 1931 | /// or if the member pointer has multiple fields. Polymorphic classes have a |
| 1932 | /// vfptr at offset zero, so we can use zero for null. If there are multiple |
| 1933 | /// fields, we can use zero even if it is a valid field offset because |
| 1934 | /// null-ness testing will check the other fields. |
| 1935 | bool nullFieldOffsetIsZero() const { |
| 1936 | return !MSInheritanceAttr::hasOnlyOneField(/*IsMemberFunction=*/false, |
| 1937 | getMSInheritanceModel()) || |
| 1938 | (hasDefinition() && isPolymorphic()); |
| 1939 | } |
| 1940 | |
| 1941 | /// Controls when vtordisps will be emitted if this record is used as a |
| 1942 | /// virtual base. |
| 1943 | MSVtorDispAttr::Mode getMSVtorDispMode() const; |
| 1944 | |
| 1945 | /// Determine whether this lambda expression was known to be dependent |
| 1946 | /// at the time it was created, even if its context does not appear to be |
| 1947 | /// dependent. |
| 1948 | /// |
| 1949 | /// This flag is a workaround for an issue with parsing, where default |
| 1950 | /// arguments are parsed before their enclosing function declarations have |
| 1951 | /// been created. This means that any lambda expressions within those |
| 1952 | /// default arguments will have as their DeclContext the context enclosing |
| 1953 | /// the function declaration, which may be non-dependent even when the |
| 1954 | /// function declaration itself is dependent. This flag indicates when we |
| 1955 | /// know that the lambda is dependent despite that. |
| 1956 | bool isDependentLambda() const { |
| 1957 | return isLambda() && getLambdaData().Dependent; |
| 1958 | } |
| 1959 | |
| 1960 | TypeSourceInfo *getLambdaTypeInfo() const { |
| 1961 | return getLambdaData().MethodTyInfo; |
| 1962 | } |
| 1963 | |
| 1964 | // Determine whether this type is an Interface Like type for |
| 1965 | // __interface inheritance purposes. |
| 1966 | bool isInterfaceLike() const; |
| 1967 | |
| 1968 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 1969 | static bool classofKind(Kind K) { |
| 1970 | return K >= firstCXXRecord && K <= lastCXXRecord; |
| 1971 | } |
| 1972 | }; |
| 1973 | |
| 1974 | /// Store information needed for an explicit specifier. |
| 1975 | /// used by CXXDeductionGuideDecl, CXXConstructorDecl and CXXConversionDecl. |
| 1976 | class ExplicitSpecifier { |
| 1977 | llvm::PointerIntPair<Expr *, 2, ExplicitSpecKind> ExplicitSpec{ |
| 1978 | nullptr, ExplicitSpecKind::ResolvedFalse}; |
| 1979 | |
| 1980 | public: |
| 1981 | ExplicitSpecifier() = default; |
| 1982 | ExplicitSpecifier(Expr *Expression, ExplicitSpecKind Kind) |
| 1983 | : ExplicitSpec(Expression, Kind) {} |
| 1984 | ExplicitSpecKind getKind() const { return ExplicitSpec.getInt(); } |
| 1985 | const Expr *getExpr() const { return ExplicitSpec.getPointer(); } |
| 1986 | Expr *getExpr() { return ExplicitSpec.getPointer(); } |
| 1987 | |
| 1988 | /// Return true if the ExplicitSpecifier isn't defaulted. |
| 1989 | bool isSpecified() const { |
| 1990 | return ExplicitSpec.getInt() != ExplicitSpecKind::ResolvedFalse || |
| 1991 | ExplicitSpec.getPointer(); |
| 1992 | } |
| 1993 | |
| 1994 | /// Check for Equivalence of explicit specifiers. |
| 1995 | /// Return True if the explicit specifier are equivalent false otherwise. |
| 1996 | bool isEquivalent(const ExplicitSpecifier Other) const; |
| 1997 | /// Return true if the explicit specifier is already resolved to be explicit. |
| 1998 | bool isExplicit() const { |
| 1999 | return ExplicitSpec.getInt() == ExplicitSpecKind::ResolvedTrue; |
| 2000 | } |
| 2001 | /// Return true if the ExplicitSpecifier isn't valid. |
| 2002 | /// This state occurs after a substitution failures. |
| 2003 | bool isInvalid() const { |
| 2004 | return ExplicitSpec.getInt() == ExplicitSpecKind::Unresolved && |
| 2005 | !ExplicitSpec.getPointer(); |
| 2006 | } |
| 2007 | void setKind(ExplicitSpecKind Kind) { ExplicitSpec.setInt(Kind); } |
| 2008 | void setExpr(Expr *E) { ExplicitSpec.setPointer(E); } |
| 2009 | // getFromDecl - retrieve the explicit specifier in the given declaration. |
| 2010 | // if the given declaration has no explicit. the returned explicit specifier |
| 2011 | // is defaulted. .isSpecified() will be false. |
| 2012 | static ExplicitSpecifier getFromDecl(FunctionDecl *Function); |
| 2013 | static const ExplicitSpecifier getFromDecl(const FunctionDecl *Function) { |
| 2014 | return getFromDecl(const_cast<FunctionDecl *>(Function)); |
| 2015 | } |
| 2016 | static ExplicitSpecifier Invalid() { |
| 2017 | return ExplicitSpecifier(nullptr, ExplicitSpecKind::Unresolved); |
| 2018 | } |
| 2019 | }; |
| 2020 | |
| 2021 | /// Represents a C++ deduction guide declaration. |
| 2022 | /// |
| 2023 | /// \code |
| 2024 | /// template<typename T> struct A { A(); A(T); }; |
| 2025 | /// A() -> A<int>; |
| 2026 | /// \endcode |
| 2027 | /// |
| 2028 | /// In this example, there will be an explicit deduction guide from the |
| 2029 | /// second line, and implicit deduction guide templates synthesized from |
| 2030 | /// the constructors of \c A. |
| 2031 | class CXXDeductionGuideDecl : public FunctionDecl { |
| 2032 | void anchor() override; |
| 2033 | |
| 2034 | private: |
| 2035 | CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
| 2036 | ExplicitSpecifier ES, |
| 2037 | const DeclarationNameInfo &NameInfo, QualType T, |
| 2038 | TypeSourceInfo *TInfo, SourceLocation EndLocation) |
| 2039 | : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo, |
| 2040 | SC_None, false, CSK_unspecified), |
| 2041 | ExplicitSpec(ES) { |
| 2042 | if (EndLocation.isValid()) |
| 2043 | setRangeEnd(EndLocation); |
| 2044 | setIsCopyDeductionCandidate(false); |
| 2045 | } |
| 2046 | |
| 2047 | ExplicitSpecifier ExplicitSpec; |
| 2048 | void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; } |
| 2049 | |
| 2050 | public: |
| 2051 | friend class ASTDeclReader; |
| 2052 | friend class ASTDeclWriter; |
| 2053 | |
| 2054 | static CXXDeductionGuideDecl * |
| 2055 | Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
| 2056 | ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T, |
| 2057 | TypeSourceInfo *TInfo, SourceLocation EndLocation); |
| 2058 | |
| 2059 | static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 2060 | |
| 2061 | ExplicitSpecifier getExplicitSpecifier() { return ExplicitSpec; } |
| 2062 | const ExplicitSpecifier getExplicitSpecifier() const { return ExplicitSpec; } |
| 2063 | |
| 2064 | /// Return true if the declartion is already resolved to be explicit. |
| 2065 | bool isExplicit() const { return ExplicitSpec.isExplicit(); } |
| 2066 | |
| 2067 | /// Get the template for which this guide performs deduction. |
| 2068 | TemplateDecl *getDeducedTemplate() const { |
| 2069 | return getDeclName().getCXXDeductionGuideTemplate(); |
| 2070 | } |
| 2071 | |
| 2072 | void setIsCopyDeductionCandidate(bool isCDC = true) { |
| 2073 | FunctionDeclBits.IsCopyDeductionCandidate = isCDC; |
| 2074 | } |
| 2075 | |
| 2076 | bool isCopyDeductionCandidate() const { |
| 2077 | return FunctionDeclBits.IsCopyDeductionCandidate; |
| 2078 | } |
| 2079 | |
| 2080 | // Implement isa/cast/dyncast/etc. |
| 2081 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 2082 | static bool classofKind(Kind K) { return K == CXXDeductionGuide; } |
| 2083 | }; |
| 2084 | |
| 2085 | /// Represents a static or instance method of a struct/union/class. |
| 2086 | /// |
| 2087 | /// In the terminology of the C++ Standard, these are the (static and |
| 2088 | /// non-static) member functions, whether virtual or not. |
| 2089 | class CXXMethodDecl : public FunctionDecl { |
| 2090 | void anchor() override; |
| 2091 | |
| 2092 | protected: |
| 2093 | CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD, |
| 2094 | SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, |
| 2095 | QualType T, TypeSourceInfo *TInfo, StorageClass SC, |
| 2096 | bool isInline, ConstexprSpecKind ConstexprKind, |
| 2097 | SourceLocation EndLocation) |
| 2098 | : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, SC, isInline, |
| 2099 | ConstexprKind) { |
| 2100 | if (EndLocation.isValid()) |
| 2101 | setRangeEnd(EndLocation); |
| 2102 | } |
| 2103 | |
| 2104 | public: |
| 2105 | static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD, |
| 2106 | SourceLocation StartLoc, |
| 2107 | const DeclarationNameInfo &NameInfo, QualType T, |
| 2108 | TypeSourceInfo *TInfo, StorageClass SC, |
| 2109 | bool isInline, ConstexprSpecKind ConstexprKind, |
| 2110 | SourceLocation EndLocation); |
| 2111 | |
| 2112 | static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 2113 | |
| 2114 | bool isStatic() const; |
| 2115 | bool isInstance() const { return !isStatic(); } |
| 2116 | |
| 2117 | /// Returns true if the given operator is implicitly static in a record |
| 2118 | /// context. |
| 2119 | static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) { |
| 2120 | // [class.free]p1: |
| 2121 | // Any allocation function for a class T is a static member |
| 2122 | // (even if not explicitly declared static). |
| 2123 | // [class.free]p6 Any deallocation function for a class X is a static member |
| 2124 | // (even if not explicitly declared static). |
| 2125 | return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete || |
| 2126 | OOK == OO_Array_Delete; |
| 2127 | } |
| 2128 | |
| 2129 | bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); } |
| 2130 | bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); } |
| 2131 | |
| 2132 | bool isVirtual() const { |
| 2133 | CXXMethodDecl *CD = const_cast<CXXMethodDecl*>(this)->getCanonicalDecl(); |
| 2134 | |
| 2135 | // Member function is virtual if it is marked explicitly so, or if it is |
| 2136 | // declared in __interface -- then it is automatically pure virtual. |
| 2137 | if (CD->isVirtualAsWritten() || CD->isPure()) |
| 2138 | return true; |
| 2139 | |
| 2140 | return CD->size_overridden_methods() != 0; |
| 2141 | } |
| 2142 | |
| 2143 | /// If it's possible to devirtualize a call to this method, return the called |
| 2144 | /// function. Otherwise, return null. |
| 2145 | |
| 2146 | /// \param Base The object on which this virtual function is called. |
| 2147 | /// \param IsAppleKext True if we are compiling for Apple kext. |
| 2148 | CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, bool IsAppleKext); |
| 2149 | |
| 2150 | const CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, |
| 2151 | bool IsAppleKext) const { |
| 2152 | return const_cast<CXXMethodDecl *>(this)->getDevirtualizedMethod( |
| 2153 | Base, IsAppleKext); |
| 2154 | } |
| 2155 | |
| 2156 | /// Determine whether this is a usual deallocation function (C++ |
| 2157 | /// [basic.stc.dynamic.deallocation]p2), which is an overloaded delete or |
| 2158 | /// delete[] operator with a particular signature. Populates \p PreventedBy |
| 2159 | /// with the declarations of the functions of the same kind if they were the |
| 2160 | /// reason for this function returning false. This is used by |
| 2161 | /// Sema::isUsualDeallocationFunction to reconsider the answer based on the |
| 2162 | /// context. |
| 2163 | bool isUsualDeallocationFunction( |
| 2164 | SmallVectorImpl<const FunctionDecl *> &PreventedBy) const; |
| 2165 | |
| 2166 | /// Determine whether this is a copy-assignment operator, regardless |
| 2167 | /// of whether it was declared implicitly or explicitly. |
| 2168 | bool isCopyAssignmentOperator() const; |
| 2169 | |
| 2170 | /// Determine whether this is a move assignment operator. |
| 2171 | bool isMoveAssignmentOperator() const; |
| 2172 | |
| 2173 | CXXMethodDecl *getCanonicalDecl() override { |
| 2174 | return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl()); |
| 2175 | } |
| 2176 | const CXXMethodDecl *getCanonicalDecl() const { |
| 2177 | return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl(); |
| 2178 | } |
| 2179 | |
| 2180 | CXXMethodDecl *getMostRecentDecl() { |
| 2181 | return cast<CXXMethodDecl>( |
| 2182 | static_cast<FunctionDecl *>(this)->getMostRecentDecl()); |
| 2183 | } |
| 2184 | const CXXMethodDecl *getMostRecentDecl() const { |
| 2185 | return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl(); |
| 2186 | } |
| 2187 | |
| 2188 | /// True if this method is user-declared and was not |
| 2189 | /// deleted or defaulted on its first declaration. |
| 2190 | bool isUserProvided() const { |
| 2191 | auto *DeclAsWritten = this; |
| 2192 | if (auto *Pattern = getTemplateInstantiationPattern()) |
| 2193 | DeclAsWritten = cast<CXXMethodDecl>(Pattern); |
| 2194 | return !(DeclAsWritten->isDeleted() || |
| 2195 | DeclAsWritten->getCanonicalDecl()->isDefaulted()); |
| 2196 | } |
| 2197 | |
| 2198 | void addOverriddenMethod(const CXXMethodDecl *MD); |
| 2199 | |
| 2200 | using method_iterator = const CXXMethodDecl *const *; |
| 2201 | |
| 2202 | method_iterator begin_overridden_methods() const; |
| 2203 | method_iterator end_overridden_methods() const; |
| 2204 | unsigned size_overridden_methods() const; |
| 2205 | |
| 2206 | using overridden_method_range= ASTContext::overridden_method_range; |
| 2207 | |
| 2208 | overridden_method_range overridden_methods() const; |
| 2209 | |
| 2210 | /// Return the parent of this method declaration, which |
| 2211 | /// is the class in which this method is defined. |
| 2212 | const CXXRecordDecl *getParent() const { |
| 2213 | return cast<CXXRecordDecl>(FunctionDecl::getParent()); |
| 2214 | } |
| 2215 | |
| 2216 | /// Return the parent of this method declaration, which |
| 2217 | /// is the class in which this method is defined. |
| 2218 | CXXRecordDecl *getParent() { |
| 2219 | return const_cast<CXXRecordDecl *>( |
| 2220 | cast<CXXRecordDecl>(FunctionDecl::getParent())); |
| 2221 | } |
| 2222 | |
| 2223 | /// Return the type of the \c this pointer. |
| 2224 | /// |
| 2225 | /// Should only be called for instance (i.e., non-static) methods. Note |
| 2226 | /// that for the call operator of a lambda closure type, this returns the |
| 2227 | /// desugared 'this' type (a pointer to the closure type), not the captured |
| 2228 | /// 'this' type. |
| 2229 | QualType getThisType() const; |
| 2230 | |
| 2231 | /// Return the type of the object pointed by \c this. |
| 2232 | /// |
| 2233 | /// See getThisType() for usage restriction. |
| 2234 | QualType getThisObjectType() const; |
| 2235 | |
| 2236 | static QualType getThisType(const FunctionProtoType *FPT, |
| 2237 | const CXXRecordDecl *Decl); |
| 2238 | |
| 2239 | static QualType getThisObjectType(const FunctionProtoType *FPT, |
| 2240 | const CXXRecordDecl *Decl); |
| 2241 | |
| 2242 | Qualifiers getMethodQualifiers() const { |
| 2243 | return getType()->castAs<FunctionProtoType>()->getMethodQuals(); |
| 2244 | } |
| 2245 | |
| 2246 | /// Retrieve the ref-qualifier associated with this method. |
| 2247 | /// |
| 2248 | /// In the following example, \c f() has an lvalue ref-qualifier, \c g() |
| 2249 | /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier. |
| 2250 | /// @code |
| 2251 | /// struct X { |
| 2252 | /// void f() &; |
| 2253 | /// void g() &&; |
| 2254 | /// void h(); |
| 2255 | /// }; |
| 2256 | /// @endcode |
| 2257 | RefQualifierKind getRefQualifier() const { |
| 2258 | return getType()->castAs<FunctionProtoType>()->getRefQualifier(); |
| 2259 | } |
| 2260 | |
| 2261 | bool hasInlineBody() const; |
| 2262 | |
| 2263 | /// Determine whether this is a lambda closure type's static member |
| 2264 | /// function that is used for the result of the lambda's conversion to |
| 2265 | /// function pointer (for a lambda with no captures). |
| 2266 | /// |
| 2267 | /// The function itself, if used, will have a placeholder body that will be |
| 2268 | /// supplied by IR generation to either forward to the function call operator |
| 2269 | /// or clone the function call operator. |
| 2270 | bool isLambdaStaticInvoker() const; |
| 2271 | |
| 2272 | /// Find the method in \p RD that corresponds to this one. |
| 2273 | /// |
| 2274 | /// Find if \p RD or one of the classes it inherits from override this method. |
| 2275 | /// If so, return it. \p RD is assumed to be a subclass of the class defining |
| 2276 | /// this method (or be the class itself), unless \p MayBeBase is set to true. |
| 2277 | CXXMethodDecl * |
| 2278 | getCorrespondingMethodInClass(const CXXRecordDecl *RD, |
| 2279 | bool MayBeBase = false); |
| 2280 | |
| 2281 | const CXXMethodDecl * |
| 2282 | getCorrespondingMethodInClass(const CXXRecordDecl *RD, |
| 2283 | bool MayBeBase = false) const { |
| 2284 | return const_cast<CXXMethodDecl *>(this) |
| 2285 | ->getCorrespondingMethodInClass(RD, MayBeBase); |
| 2286 | } |
| 2287 | |
| 2288 | /// Find if \p RD declares a function that overrides this function, and if so, |
| 2289 | /// return it. Does not search base classes. |
| 2290 | CXXMethodDecl *getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD, |
| 2291 | bool MayBeBase = false); |
| 2292 | const CXXMethodDecl * |
| 2293 | getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD, |
| 2294 | bool MayBeBase = false) const { |
| 2295 | return const_cast<CXXMethodDecl *>(this) |
| 2296 | ->getCorrespondingMethodDeclaredInClass(RD, MayBeBase); |
| 2297 | } |
| 2298 | |
| 2299 | // Implement isa/cast/dyncast/etc. |
| 2300 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 2301 | static bool classofKind(Kind K) { |
| 2302 | return K >= firstCXXMethod && K <= lastCXXMethod; |
| 2303 | } |
| 2304 | }; |
| 2305 | |
| 2306 | /// Represents a C++ base or member initializer. |
| 2307 | /// |
| 2308 | /// This is part of a constructor initializer that |
| 2309 | /// initializes one non-static member variable or one base class. For |
| 2310 | /// example, in the following, both 'A(a)' and 'f(3.14159)' are member |
| 2311 | /// initializers: |
| 2312 | /// |
| 2313 | /// \code |
| 2314 | /// class A { }; |
| 2315 | /// class B : public A { |
| 2316 | /// float f; |
| 2317 | /// public: |
| 2318 | /// B(A& a) : A(a), f(3.14159) { } |
| 2319 | /// }; |
| 2320 | /// \endcode |
| 2321 | class CXXCtorInitializer final { |
| 2322 | /// Either the base class name/delegating constructor type (stored as |
| 2323 | /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field |
| 2324 | /// (IndirectFieldDecl*) being initialized. |
| 2325 | llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *> |
| 2326 | Initializee; |
| 2327 | |
| 2328 | /// The source location for the field name or, for a base initializer |
| 2329 | /// pack expansion, the location of the ellipsis. |
| 2330 | /// |
| 2331 | /// In the case of a delegating |
| 2332 | /// constructor, it will still include the type's source location as the |
| 2333 | /// Initializee points to the CXXConstructorDecl (to allow loop detection). |
| 2334 | SourceLocation MemberOrEllipsisLocation; |
| 2335 | |
| 2336 | /// The argument used to initialize the base or member, which may |
| 2337 | /// end up constructing an object (when multiple arguments are involved). |
| 2338 | Stmt *Init; |
| 2339 | |
| 2340 | /// Location of the left paren of the ctor-initializer. |
| 2341 | SourceLocation LParenLoc; |
| 2342 | |
| 2343 | /// Location of the right paren of the ctor-initializer. |
| 2344 | SourceLocation RParenLoc; |
| 2345 | |
| 2346 | /// If the initializee is a type, whether that type makes this |
| 2347 | /// a delegating initialization. |
| 2348 | unsigned IsDelegating : 1; |
| 2349 | |
| 2350 | /// If the initializer is a base initializer, this keeps track |
| 2351 | /// of whether the base is virtual or not. |
| 2352 | unsigned IsVirtual : 1; |
| 2353 | |
| 2354 | /// Whether or not the initializer is explicitly written |
| 2355 | /// in the sources. |
| 2356 | unsigned IsWritten : 1; |
| 2357 | |
| 2358 | /// If IsWritten is true, then this number keeps track of the textual order |
| 2359 | /// of this initializer in the original sources, counting from 0. |
| 2360 | unsigned SourceOrder : 13; |
| 2361 | |
| 2362 | public: |
| 2363 | /// Creates a new base-class initializer. |
| 2364 | explicit |
| 2365 | CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual, |
| 2366 | SourceLocation L, Expr *Init, SourceLocation R, |
| 2367 | SourceLocation EllipsisLoc); |
| 2368 | |
| 2369 | /// Creates a new member initializer. |
| 2370 | explicit |
| 2371 | CXXCtorInitializer(ASTContext &Context, FieldDecl *Member, |
| 2372 | SourceLocation MemberLoc, SourceLocation L, Expr *Init, |
| 2373 | SourceLocation R); |
| 2374 | |
| 2375 | /// Creates a new anonymous field initializer. |
| 2376 | explicit |
| 2377 | CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member, |
| 2378 | SourceLocation MemberLoc, SourceLocation L, Expr *Init, |
| 2379 | SourceLocation R); |
| 2380 | |
| 2381 | /// Creates a new delegating initializer. |
| 2382 | explicit |
| 2383 | CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, |
| 2384 | SourceLocation L, Expr *Init, SourceLocation R); |
| 2385 | |
| 2386 | /// \return Unique reproducible object identifier. |
| 2387 | int64_t getID(const ASTContext &Context) const; |
| 2388 | |
| 2389 | /// Determine whether this initializer is initializing a base class. |
| 2390 | bool isBaseInitializer() const { |
| 2391 | return Initializee.is<TypeSourceInfo*>() && !IsDelegating; |
| 2392 | } |
| 2393 | |
| 2394 | /// Determine whether this initializer is initializing a non-static |
| 2395 | /// data member. |
| 2396 | bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); } |
| 2397 | |
| 2398 | bool isAnyMemberInitializer() const { |
| 2399 | return isMemberInitializer() || isIndirectMemberInitializer(); |
| 2400 | } |
| 2401 | |
| 2402 | bool isIndirectMemberInitializer() const { |
| 2403 | return Initializee.is<IndirectFieldDecl*>(); |
| 2404 | } |
| 2405 | |
| 2406 | /// Determine whether this initializer is an implicit initializer |
| 2407 | /// generated for a field with an initializer defined on the member |
| 2408 | /// declaration. |
| 2409 | /// |
| 2410 | /// In-class member initializers (also known as "non-static data member |
| 2411 | /// initializations", NSDMIs) were introduced in C++11. |
| 2412 | bool isInClassMemberInitializer() const { |
| 2413 | return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass; |
| 2414 | } |
| 2415 | |
| 2416 | /// Determine whether this initializer is creating a delegating |
| 2417 | /// constructor. |
| 2418 | bool isDelegatingInitializer() const { |
| 2419 | return Initializee.is<TypeSourceInfo*>() && IsDelegating; |
| 2420 | } |
| 2421 | |
| 2422 | /// Determine whether this initializer is a pack expansion. |
| 2423 | bool isPackExpansion() const { |
| 2424 | return isBaseInitializer() && MemberOrEllipsisLocation.isValid(); |
| 2425 | } |
| 2426 | |
| 2427 | // For a pack expansion, returns the location of the ellipsis. |
| 2428 | SourceLocation getEllipsisLoc() const { |
| 2429 | assert(isPackExpansion() && "Initializer is not a pack expansion")((isPackExpansion() && "Initializer is not a pack expansion" ) ? static_cast<void> (0) : __assert_fail ("isPackExpansion() && \"Initializer is not a pack expansion\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2429, __PRETTY_FUNCTION__)); |
| 2430 | return MemberOrEllipsisLocation; |
| 2431 | } |
| 2432 | |
| 2433 | /// If this is a base class initializer, returns the type of the |
| 2434 | /// base class with location information. Otherwise, returns an NULL |
| 2435 | /// type location. |
| 2436 | TypeLoc getBaseClassLoc() const; |
| 2437 | |
| 2438 | /// If this is a base class initializer, returns the type of the base class. |
| 2439 | /// Otherwise, returns null. |
| 2440 | const Type *getBaseClass() const; |
| 2441 | |
| 2442 | /// Returns whether the base is virtual or not. |
| 2443 | bool isBaseVirtual() const { |
| 2444 | assert(isBaseInitializer() && "Must call this on base initializer!")((isBaseInitializer() && "Must call this on base initializer!" ) ? static_cast<void> (0) : __assert_fail ("isBaseInitializer() && \"Must call this on base initializer!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2444, __PRETTY_FUNCTION__)); |
| 2445 | |
| 2446 | return IsVirtual; |
| 2447 | } |
| 2448 | |
| 2449 | /// Returns the declarator information for a base class or delegating |
| 2450 | /// initializer. |
| 2451 | TypeSourceInfo *getTypeSourceInfo() const { |
| 2452 | return Initializee.dyn_cast<TypeSourceInfo *>(); |
| 2453 | } |
| 2454 | |
| 2455 | /// If this is a member initializer, returns the declaration of the |
| 2456 | /// non-static data member being initialized. Otherwise, returns null. |
| 2457 | FieldDecl *getMember() const { |
| 2458 | if (isMemberInitializer()) |
| 2459 | return Initializee.get<FieldDecl*>(); |
| 2460 | return nullptr; |
| 2461 | } |
| 2462 | |
| 2463 | FieldDecl *getAnyMember() const { |
| 2464 | if (isMemberInitializer()) |
| 2465 | return Initializee.get<FieldDecl*>(); |
| 2466 | if (isIndirectMemberInitializer()) |
| 2467 | return Initializee.get<IndirectFieldDecl*>()->getAnonField(); |
| 2468 | return nullptr; |
| 2469 | } |
| 2470 | |
| 2471 | IndirectFieldDecl *getIndirectMember() const { |
| 2472 | if (isIndirectMemberInitializer()) |
| 2473 | return Initializee.get<IndirectFieldDecl*>(); |
| 2474 | return nullptr; |
| 2475 | } |
| 2476 | |
| 2477 | SourceLocation getMemberLocation() const { |
| 2478 | return MemberOrEllipsisLocation; |
| 2479 | } |
| 2480 | |
| 2481 | /// Determine the source location of the initializer. |
| 2482 | SourceLocation getSourceLocation() const; |
| 2483 | |
| 2484 | /// Determine the source range covering the entire initializer. |
| 2485 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)); |
| 2486 | |
| 2487 | /// Determine whether this initializer is explicitly written |
| 2488 | /// in the source code. |
| 2489 | bool isWritten() const { return IsWritten; } |
| 2490 | |
| 2491 | /// Return the source position of the initializer, counting from 0. |
| 2492 | /// If the initializer was implicit, -1 is returned. |
| 2493 | int getSourceOrder() const { |
| 2494 | return IsWritten ? static_cast<int>(SourceOrder) : -1; |
| 2495 | } |
| 2496 | |
| 2497 | /// Set the source order of this initializer. |
| 2498 | /// |
| 2499 | /// This can only be called once for each initializer; it cannot be called |
| 2500 | /// on an initializer having a positive number of (implicit) array indices. |
| 2501 | /// |
| 2502 | /// This assumes that the initializer was written in the source code, and |
| 2503 | /// ensures that isWritten() returns true. |
| 2504 | void setSourceOrder(int Pos) { |
| 2505 | assert(!IsWritten &&((!IsWritten && "setSourceOrder() used on implicit initializer" ) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2506, __PRETTY_FUNCTION__)) |
| 2506 | "setSourceOrder() used on implicit initializer")((!IsWritten && "setSourceOrder() used on implicit initializer" ) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2506, __PRETTY_FUNCTION__)); |
| 2507 | assert(SourceOrder == 0 &&((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer" ) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2508, __PRETTY_FUNCTION__)) |
| 2508 | "calling twice setSourceOrder() on the same initializer")((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer" ) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2508, __PRETTY_FUNCTION__)); |
| 2509 | assert(Pos >= 0 &&((Pos >= 0 && "setSourceOrder() used to make an initializer implicit" ) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2510, __PRETTY_FUNCTION__)) |
| 2510 | "setSourceOrder() used to make an initializer implicit")((Pos >= 0 && "setSourceOrder() used to make an initializer implicit" ) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2510, __PRETTY_FUNCTION__)); |
| 2511 | IsWritten = true; |
| 2512 | SourceOrder = static_cast<unsigned>(Pos); |
| 2513 | } |
| 2514 | |
| 2515 | SourceLocation getLParenLoc() const { return LParenLoc; } |
| 2516 | SourceLocation getRParenLoc() const { return RParenLoc; } |
| 2517 | |
| 2518 | /// Get the initializer. |
| 2519 | Expr *getInit() const { return static_cast<Expr *>(Init); } |
| 2520 | }; |
| 2521 | |
| 2522 | /// Description of a constructor that was inherited from a base class. |
| 2523 | class InheritedConstructor { |
| 2524 | ConstructorUsingShadowDecl *Shadow = nullptr; |
| 2525 | CXXConstructorDecl *BaseCtor = nullptr; |
| 2526 | |
| 2527 | public: |
| 2528 | InheritedConstructor() = default; |
| 2529 | InheritedConstructor(ConstructorUsingShadowDecl *Shadow, |
| 2530 | CXXConstructorDecl *BaseCtor) |
| 2531 | : Shadow(Shadow), BaseCtor(BaseCtor) {} |
| 2532 | |
| 2533 | explicit operator bool() const { return Shadow; } |
| 2534 | |
| 2535 | ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; } |
| 2536 | CXXConstructorDecl *getConstructor() const { return BaseCtor; } |
| 2537 | }; |
| 2538 | |
| 2539 | /// Represents a C++ constructor within a class. |
| 2540 | /// |
| 2541 | /// For example: |
| 2542 | /// |
| 2543 | /// \code |
| 2544 | /// class X { |
| 2545 | /// public: |
| 2546 | /// explicit X(int); // represented by a CXXConstructorDecl. |
| 2547 | /// }; |
| 2548 | /// \endcode |
| 2549 | class CXXConstructorDecl final |
| 2550 | : public CXXMethodDecl, |
| 2551 | private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor, |
| 2552 | ExplicitSpecifier> { |
| 2553 | // This class stores some data in DeclContext::CXXConstructorDeclBits |
| 2554 | // to save some space. Use the provided accessors to access it. |
| 2555 | |
| 2556 | /// \name Support for base and member initializers. |
| 2557 | /// \{ |
| 2558 | /// The arguments used to initialize the base or member. |
| 2559 | LazyCXXCtorInitializersPtr CtorInitializers; |
| 2560 | |
| 2561 | CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
| 2562 | const DeclarationNameInfo &NameInfo, QualType T, |
| 2563 | TypeSourceInfo *TInfo, ExplicitSpecifier ES, bool isInline, |
| 2564 | bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind, |
| 2565 | InheritedConstructor Inherited); |
| 2566 | |
| 2567 | void anchor() override; |
| 2568 | |
| 2569 | size_t numTrailingObjects(OverloadToken<InheritedConstructor>) const { |
| 2570 | return CXXConstructorDeclBits.IsInheritingConstructor; |
| 2571 | } |
| 2572 | size_t numTrailingObjects(OverloadToken<ExplicitSpecifier>) const { |
| 2573 | return CXXConstructorDeclBits.HasTrailingExplicitSpecifier; |
| 2574 | } |
| 2575 | |
| 2576 | ExplicitSpecifier getExplicitSpecifierInternal() const { |
| 2577 | if (CXXConstructorDeclBits.HasTrailingExplicitSpecifier) |
| 2578 | return *getTrailingObjects<ExplicitSpecifier>(); |
| 2579 | return ExplicitSpecifier( |
| 2580 | nullptr, CXXConstructorDeclBits.IsSimpleExplicit |
| 2581 | ? ExplicitSpecKind::ResolvedTrue |
| 2582 | : ExplicitSpecKind::ResolvedFalse); |
| 2583 | } |
| 2584 | |
| 2585 | void setExplicitSpecifier(ExplicitSpecifier ES) { |
| 2586 | assert((!ES.getExpr() ||(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier ) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2589, __PRETTY_FUNCTION__)) |
| 2587 | CXXConstructorDeclBits.HasTrailingExplicitSpecifier) &&(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier ) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2589, __PRETTY_FUNCTION__)) |
| 2588 | "cannot set this explicit specifier. no trail-allocated space for "(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier ) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2589, __PRETTY_FUNCTION__)) |
| 2589 | "explicit")(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier ) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2589, __PRETTY_FUNCTION__)); |
| 2590 | if (ES.getExpr()) |
| 2591 | *getCanonicalDecl()->getTrailingObjects<ExplicitSpecifier>() = ES; |
| 2592 | else |
| 2593 | CXXConstructorDeclBits.IsSimpleExplicit = ES.isExplicit(); |
| 2594 | } |
| 2595 | |
| 2596 | enum TraillingAllocKind { |
| 2597 | TAKInheritsConstructor = 1, |
| 2598 | TAKHasTailExplicit = 1 << 1, |
| 2599 | }; |
| 2600 | |
| 2601 | uint64_t getTraillingAllocKind() const { |
| 2602 | return numTrailingObjects(OverloadToken<InheritedConstructor>()) | |
| 2603 | (numTrailingObjects(OverloadToken<ExplicitSpecifier>()) << 1); |
| 2604 | } |
| 2605 | |
| 2606 | public: |
| 2607 | friend class ASTDeclReader; |
| 2608 | friend class ASTDeclWriter; |
| 2609 | friend TrailingObjects; |
| 2610 | |
| 2611 | static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
| 2612 | uint64_t AllocKind); |
| 2613 | static CXXConstructorDecl * |
| 2614 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
| 2615 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
| 2616 | ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared, |
| 2617 | ConstexprSpecKind ConstexprKind, |
| 2618 | InheritedConstructor Inherited = InheritedConstructor()); |
| 2619 | |
| 2620 | ExplicitSpecifier getExplicitSpecifier() { |
| 2621 | return getCanonicalDecl()->getExplicitSpecifierInternal(); |
| 2622 | } |
| 2623 | const ExplicitSpecifier getExplicitSpecifier() const { |
| 2624 | return getCanonicalDecl()->getExplicitSpecifierInternal(); |
| 2625 | } |
| 2626 | |
| 2627 | /// Return true if the declartion is already resolved to be explicit. |
| 2628 | bool isExplicit() const { return getExplicitSpecifier().isExplicit(); } |
| 2629 | |
| 2630 | /// Iterates through the member/base initializer list. |
| 2631 | using init_iterator = CXXCtorInitializer **; |
| 2632 | |
| 2633 | /// Iterates through the member/base initializer list. |
| 2634 | using init_const_iterator = CXXCtorInitializer *const *; |
| 2635 | |
| 2636 | using init_range = llvm::iterator_range<init_iterator>; |
| 2637 | using init_const_range = llvm::iterator_range<init_const_iterator>; |
| 2638 | |
| 2639 | init_range inits() { return init_range(init_begin(), init_end()); } |
| 2640 | init_const_range inits() const { |
| 2641 | return init_const_range(init_begin(), init_end()); |
| 2642 | } |
| 2643 | |
| 2644 | /// Retrieve an iterator to the first initializer. |
| 2645 | init_iterator init_begin() { |
| 2646 | const auto *ConstThis = this; |
| 2647 | return const_cast<init_iterator>(ConstThis->init_begin()); |
| 2648 | } |
| 2649 | |
| 2650 | /// Retrieve an iterator to the first initializer. |
| 2651 | init_const_iterator init_begin() const; |
| 2652 | |
| 2653 | /// Retrieve an iterator past the last initializer. |
| 2654 | init_iterator init_end() { |
| 2655 | return init_begin() + getNumCtorInitializers(); |
| 2656 | } |
| 2657 | |
| 2658 | /// Retrieve an iterator past the last initializer. |
| 2659 | init_const_iterator init_end() const { |
| 2660 | return init_begin() + getNumCtorInitializers(); |
| 2661 | } |
| 2662 | |
| 2663 | using init_reverse_iterator = std::reverse_iterator<init_iterator>; |
| 2664 | using init_const_reverse_iterator = |
| 2665 | std::reverse_iterator<init_const_iterator>; |
| 2666 | |
| 2667 | init_reverse_iterator init_rbegin() { |
| 2668 | return init_reverse_iterator(init_end()); |
| 2669 | } |
| 2670 | init_const_reverse_iterator init_rbegin() const { |
| 2671 | return init_const_reverse_iterator(init_end()); |
| 2672 | } |
| 2673 | |
| 2674 | init_reverse_iterator init_rend() { |
| 2675 | return init_reverse_iterator(init_begin()); |
| 2676 | } |
| 2677 | init_const_reverse_iterator init_rend() const { |
| 2678 | return init_const_reverse_iterator(init_begin()); |
| 2679 | } |
| 2680 | |
| 2681 | /// Determine the number of arguments used to initialize the member |
| 2682 | /// or base. |
| 2683 | unsigned getNumCtorInitializers() const { |
| 2684 | return CXXConstructorDeclBits.NumCtorInitializers; |
| 2685 | } |
| 2686 | |
| 2687 | void setNumCtorInitializers(unsigned numCtorInitializers) { |
| 2688 | CXXConstructorDeclBits.NumCtorInitializers = numCtorInitializers; |
| 2689 | // This assert added because NumCtorInitializers is stored |
| 2690 | // in CXXConstructorDeclBits as a bitfield and its width has |
| 2691 | // been shrunk from 32 bits to fit into CXXConstructorDeclBitfields. |
| 2692 | assert(CXXConstructorDeclBits.NumCtorInitializers ==((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && "NumCtorInitializers overflow!") ? static_cast< void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2693, __PRETTY_FUNCTION__)) |
| 2693 | numCtorInitializers && "NumCtorInitializers overflow!")((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && "NumCtorInitializers overflow!") ? static_cast< void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2693, __PRETTY_FUNCTION__)); |
| 2694 | } |
| 2695 | |
| 2696 | void setCtorInitializers(CXXCtorInitializer **Initializers) { |
| 2697 | CtorInitializers = Initializers; |
| 2698 | } |
| 2699 | |
| 2700 | /// Determine whether this constructor is a delegating constructor. |
| 2701 | bool isDelegatingConstructor() const { |
| 2702 | return (getNumCtorInitializers() == 1) && |
| 2703 | init_begin()[0]->isDelegatingInitializer(); |
| 2704 | } |
| 2705 | |
| 2706 | /// When this constructor delegates to another, retrieve the target. |
| 2707 | CXXConstructorDecl *getTargetConstructor() const; |
| 2708 | |
| 2709 | /// Whether this constructor is a default |
| 2710 | /// constructor (C++ [class.ctor]p5), which can be used to |
| 2711 | /// default-initialize a class of this type. |
| 2712 | bool isDefaultConstructor() const; |
| 2713 | |
| 2714 | /// Whether this constructor is a copy constructor (C++ [class.copy]p2, |
| 2715 | /// which can be used to copy the class. |
| 2716 | /// |
| 2717 | /// \p TypeQuals will be set to the qualifiers on the |
| 2718 | /// argument type. For example, \p TypeQuals would be set to \c |
| 2719 | /// Qualifiers::Const for the following copy constructor: |
| 2720 | /// |
| 2721 | /// \code |
| 2722 | /// class X { |
| 2723 | /// public: |
| 2724 | /// X(const X&); |
| 2725 | /// }; |
| 2726 | /// \endcode |
| 2727 | bool isCopyConstructor(unsigned &TypeQuals) const; |
| 2728 | |
| 2729 | /// Whether this constructor is a copy |
| 2730 | /// constructor (C++ [class.copy]p2, which can be used to copy the |
| 2731 | /// class. |
| 2732 | bool isCopyConstructor() const { |
| 2733 | unsigned TypeQuals = 0; |
| 2734 | return isCopyConstructor(TypeQuals); |
| 2735 | } |
| 2736 | |
| 2737 | /// Determine whether this constructor is a move constructor |
| 2738 | /// (C++11 [class.copy]p3), which can be used to move values of the class. |
| 2739 | /// |
| 2740 | /// \param TypeQuals If this constructor is a move constructor, will be set |
| 2741 | /// to the type qualifiers on the referent of the first parameter's type. |
| 2742 | bool isMoveConstructor(unsigned &TypeQuals) const; |
| 2743 | |
| 2744 | /// Determine whether this constructor is a move constructor |
| 2745 | /// (C++11 [class.copy]p3), which can be used to move values of the class. |
| 2746 | bool isMoveConstructor() const { |
| 2747 | unsigned TypeQuals = 0; |
| 2748 | return isMoveConstructor(TypeQuals); |
| 2749 | } |
| 2750 | |
| 2751 | /// Determine whether this is a copy or move constructor. |
| 2752 | /// |
| 2753 | /// \param TypeQuals Will be set to the type qualifiers on the reference |
| 2754 | /// parameter, if in fact this is a copy or move constructor. |
| 2755 | bool isCopyOrMoveConstructor(unsigned &TypeQuals) const; |
| 2756 | |
| 2757 | /// Determine whether this a copy or move constructor. |
| 2758 | bool isCopyOrMoveConstructor() const { |
| 2759 | unsigned Quals; |
| 2760 | return isCopyOrMoveConstructor(Quals); |
| 2761 | } |
| 2762 | |
| 2763 | /// Whether this constructor is a |
| 2764 | /// converting constructor (C++ [class.conv.ctor]), which can be |
| 2765 | /// used for user-defined conversions. |
| 2766 | bool isConvertingConstructor(bool AllowExplicit) const; |
| 2767 | |
| 2768 | /// Determine whether this is a member template specialization that |
| 2769 | /// would copy the object to itself. Such constructors are never used to copy |
| 2770 | /// an object. |
| 2771 | bool isSpecializationCopyingObject() const; |
| 2772 | |
| 2773 | /// Determine whether this is an implicit constructor synthesized to |
| 2774 | /// model a call to a constructor inherited from a base class. |
| 2775 | bool isInheritingConstructor() const { |
| 2776 | return CXXConstructorDeclBits.IsInheritingConstructor; |
| 2777 | } |
| 2778 | |
| 2779 | /// State that this is an implicit constructor synthesized to |
| 2780 | /// model a call to a constructor inherited from a base class. |
| 2781 | void setInheritingConstructor(bool isIC = true) { |
| 2782 | CXXConstructorDeclBits.IsInheritingConstructor = isIC; |
| 2783 | } |
| 2784 | |
| 2785 | /// Get the constructor that this inheriting constructor is based on. |
| 2786 | InheritedConstructor getInheritedConstructor() const { |
| 2787 | return isInheritingConstructor() ? |
| 2788 | *getTrailingObjects<InheritedConstructor>() : InheritedConstructor(); |
| 2789 | } |
| 2790 | |
| 2791 | CXXConstructorDecl *getCanonicalDecl() override { |
| 2792 | return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl()); |
| 2793 | } |
| 2794 | const CXXConstructorDecl *getCanonicalDecl() const { |
| 2795 | return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl(); |
| 2796 | } |
| 2797 | |
| 2798 | // Implement isa/cast/dyncast/etc. |
| 2799 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 2800 | static bool classofKind(Kind K) { return K == CXXConstructor; } |
| 2801 | }; |
| 2802 | |
| 2803 | /// Represents a C++ destructor within a class. |
| 2804 | /// |
| 2805 | /// For example: |
| 2806 | /// |
| 2807 | /// \code |
| 2808 | /// class X { |
| 2809 | /// public: |
| 2810 | /// ~X(); // represented by a CXXDestructorDecl. |
| 2811 | /// }; |
| 2812 | /// \endcode |
| 2813 | class CXXDestructorDecl : public CXXMethodDecl { |
| 2814 | friend class ASTDeclReader; |
| 2815 | friend class ASTDeclWriter; |
| 2816 | |
| 2817 | // FIXME: Don't allocate storage for these except in the first declaration |
| 2818 | // of a virtual destructor. |
| 2819 | FunctionDecl *OperatorDelete = nullptr; |
| 2820 | Expr *OperatorDeleteThisArg = nullptr; |
| 2821 | |
| 2822 | CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
| 2823 | const DeclarationNameInfo &NameInfo, QualType T, |
| 2824 | TypeSourceInfo *TInfo, bool isInline, |
| 2825 | bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind) |
| 2826 | : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo, |
| 2827 | SC_None, isInline, ConstexprKind, SourceLocation()) { |
| 2828 | setImplicit(isImplicitlyDeclared); |
| 2829 | } |
| 2830 | |
| 2831 | void anchor() override; |
| 2832 | |
| 2833 | public: |
| 2834 | static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD, |
| 2835 | SourceLocation StartLoc, |
| 2836 | const DeclarationNameInfo &NameInfo, |
| 2837 | QualType T, TypeSourceInfo *TInfo, |
| 2838 | bool isInline, bool isImplicitlyDeclared, |
| 2839 | ConstexprSpecKind ConstexprKind); |
| 2840 | static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID); |
| 2841 | |
| 2842 | void setOperatorDelete(FunctionDecl *OD, Expr *ThisArg); |
| 2843 | |
| 2844 | const FunctionDecl *getOperatorDelete() const { |
| 2845 | return getCanonicalDecl()->OperatorDelete; |
| 2846 | } |
| 2847 | |
| 2848 | Expr *getOperatorDeleteThisArg() const { |
| 2849 | return getCanonicalDecl()->OperatorDeleteThisArg; |
| 2850 | } |
| 2851 | |
| 2852 | CXXDestructorDecl *getCanonicalDecl() override { |
| 2853 | return cast<CXXDestructorDecl>(FunctionDecl::getCanonicalDecl()); |
| 2854 | } |
| 2855 | const CXXDestructorDecl *getCanonicalDecl() const { |
| 2856 | return const_cast<CXXDestructorDecl*>(this)->getCanonicalDecl(); |
| 2857 | } |
| 2858 | |
| 2859 | // Implement isa/cast/dyncast/etc. |
| 2860 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 2861 | static bool classofKind(Kind K) { return K == CXXDestructor; } |
| 2862 | }; |
| 2863 | |
| 2864 | /// Represents a C++ conversion function within a class. |
| 2865 | /// |
| 2866 | /// For example: |
| 2867 | /// |
| 2868 | /// \code |
| 2869 | /// class X { |
| 2870 | /// public: |
| 2871 | /// operator bool(); |
| 2872 | /// }; |
| 2873 | /// \endcode |
| 2874 | class CXXConversionDecl : public CXXMethodDecl { |
| 2875 | CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
| 2876 | const DeclarationNameInfo &NameInfo, QualType T, |
| 2877 | TypeSourceInfo *TInfo, bool isInline, ExplicitSpecifier ES, |
| 2878 | ConstexprSpecKind ConstexprKind, SourceLocation EndLocation) |
| 2879 | : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo, |
| 2880 | SC_None, isInline, ConstexprKind, EndLocation), |
| 2881 | ExplicitSpec(ES) {} |
| 2882 | void anchor() override; |
| 2883 | |
| 2884 | ExplicitSpecifier ExplicitSpec; |
| 2885 | |
| 2886 | void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; } |
| 2887 | |
| 2888 | public: |
| 2889 | friend class ASTDeclReader; |
| 2890 | friend class ASTDeclWriter; |
| 2891 | |
| 2892 | static CXXConversionDecl * |
| 2893 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
| 2894 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
| 2895 | bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind, |
| 2896 | SourceLocation EndLocation); |
| 2897 | static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 2898 | |
| 2899 | ExplicitSpecifier getExplicitSpecifier() { |
| 2900 | return getCanonicalDecl()->ExplicitSpec; |
| 2901 | } |
| 2902 | |
| 2903 | const ExplicitSpecifier getExplicitSpecifier() const { |
| 2904 | return getCanonicalDecl()->ExplicitSpec; |
| 2905 | } |
| 2906 | |
| 2907 | /// Return true if the declartion is already resolved to be explicit. |
| 2908 | bool isExplicit() const { return getExplicitSpecifier().isExplicit(); } |
| 2909 | |
| 2910 | /// Returns the type that this conversion function is converting to. |
| 2911 | QualType getConversionType() const { |
| 2912 | return getType()->castAs<FunctionType>()->getReturnType(); |
| 2913 | } |
| 2914 | |
| 2915 | /// Determine whether this conversion function is a conversion from |
| 2916 | /// a lambda closure type to a block pointer. |
| 2917 | bool isLambdaToBlockPointerConversion() const; |
| 2918 | |
| 2919 | CXXConversionDecl *getCanonicalDecl() override { |
| 2920 | return cast<CXXConversionDecl>(FunctionDecl::getCanonicalDecl()); |
| 2921 | } |
| 2922 | const CXXConversionDecl *getCanonicalDecl() const { |
| 2923 | return const_cast<CXXConversionDecl*>(this)->getCanonicalDecl(); |
| 2924 | } |
| 2925 | |
| 2926 | // Implement isa/cast/dyncast/etc. |
| 2927 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 2928 | static bool classofKind(Kind K) { return K == CXXConversion; } |
| 2929 | }; |
| 2930 | |
| 2931 | /// Represents a linkage specification. |
| 2932 | /// |
| 2933 | /// For example: |
| 2934 | /// \code |
| 2935 | /// extern "C" void foo(); |
| 2936 | /// \endcode |
| 2937 | class LinkageSpecDecl : public Decl, public DeclContext { |
| 2938 | virtual void anchor(); |
| 2939 | // This class stores some data in DeclContext::LinkageSpecDeclBits to save |
| 2940 | // some space. Use the provided accessors to access it. |
| 2941 | public: |
| 2942 | /// Represents the language in a linkage specification. |
| 2943 | /// |
| 2944 | /// The values are part of the serialization ABI for |
| 2945 | /// ASTs and cannot be changed without altering that ABI. To help |
| 2946 | /// ensure a stable ABI for this, we choose the DW_LANG_ encodings |
| 2947 | /// from the dwarf standard. |
| 2948 | enum LanguageIDs { |
| 2949 | lang_c = llvm::dwarf::DW_LANG_C, |
| 2950 | lang_cxx = llvm::dwarf::DW_LANG_C_plus_plus, |
| 2951 | lang_cxx_11 = llvm::dwarf::DW_LANG_C_plus_plus_11, |
| 2952 | lang_cxx_14 = llvm::dwarf::DW_LANG_C_plus_plus_14 |
| 2953 | }; |
| 2954 | |
| 2955 | private: |
| 2956 | /// The source location for the extern keyword. |
| 2957 | SourceLocation ExternLoc; |
| 2958 | |
| 2959 | /// The source location for the right brace (if valid). |
| 2960 | SourceLocation RBraceLoc; |
| 2961 | |
| 2962 | LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc, |
| 2963 | SourceLocation LangLoc, LanguageIDs lang, bool HasBraces); |
| 2964 | |
| 2965 | public: |
| 2966 | static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC, |
| 2967 | SourceLocation ExternLoc, |
| 2968 | SourceLocation LangLoc, LanguageIDs Lang, |
| 2969 | bool HasBraces); |
| 2970 | static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 2971 | |
| 2972 | /// Return the language specified by this linkage specification. |
| 2973 | LanguageIDs getLanguage() const { |
| 2974 | return static_cast<LanguageIDs>(LinkageSpecDeclBits.Language); |
| 2975 | } |
| 2976 | |
| 2977 | /// Set the language specified by this linkage specification. |
| 2978 | void setLanguage(LanguageIDs L) { LinkageSpecDeclBits.Language = L; } |
| 2979 | |
| 2980 | /// Determines whether this linkage specification had braces in |
| 2981 | /// its syntactic form. |
| 2982 | bool hasBraces() const { |
| 2983 | assert(!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces)((!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces) ? static_cast <void> (0) : __assert_fail ("!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 2983, __PRETTY_FUNCTION__)); |
| 2984 | return LinkageSpecDeclBits.HasBraces; |
| 2985 | } |
| 2986 | |
| 2987 | SourceLocation getExternLoc() const { return ExternLoc; } |
| 2988 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
| 2989 | void setExternLoc(SourceLocation L) { ExternLoc = L; } |
| 2990 | void setRBraceLoc(SourceLocation L) { |
| 2991 | RBraceLoc = L; |
| 2992 | LinkageSpecDeclBits.HasBraces = RBraceLoc.isValid(); |
| 2993 | } |
| 2994 | |
| 2995 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
| 2996 | if (hasBraces()) |
| 2997 | return getRBraceLoc(); |
| 2998 | // No braces: get the end location of the (only) declaration in context |
| 2999 | // (if present). |
| 3000 | return decls_empty() ? getLocation() : decls_begin()->getEndLoc(); |
| 3001 | } |
| 3002 | |
| 3003 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 3004 | return SourceRange(ExternLoc, getEndLoc()); |
| 3005 | } |
| 3006 | |
| 3007 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3008 | static bool classofKind(Kind K) { return K == LinkageSpec; } |
| 3009 | |
| 3010 | static DeclContext *castToDeclContext(const LinkageSpecDecl *D) { |
| 3011 | return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D)); |
| 3012 | } |
| 3013 | |
| 3014 | static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) { |
| 3015 | return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC)); |
| 3016 | } |
| 3017 | }; |
| 3018 | |
| 3019 | /// Represents C++ using-directive. |
| 3020 | /// |
| 3021 | /// For example: |
| 3022 | /// \code |
| 3023 | /// using namespace std; |
| 3024 | /// \endcode |
| 3025 | /// |
| 3026 | /// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide |
| 3027 | /// artificial names for all using-directives in order to store |
| 3028 | /// them in DeclContext effectively. |
| 3029 | class UsingDirectiveDecl : public NamedDecl { |
| 3030 | /// The location of the \c using keyword. |
| 3031 | SourceLocation UsingLoc; |
| 3032 | |
| 3033 | /// The location of the \c namespace keyword. |
| 3034 | SourceLocation NamespaceLoc; |
| 3035 | |
| 3036 | /// The nested-name-specifier that precedes the namespace. |
| 3037 | NestedNameSpecifierLoc QualifierLoc; |
| 3038 | |
| 3039 | /// The namespace nominated by this using-directive. |
| 3040 | NamedDecl *NominatedNamespace; |
| 3041 | |
| 3042 | /// Enclosing context containing both using-directive and nominated |
| 3043 | /// namespace. |
| 3044 | DeclContext *CommonAncestor; |
| 3045 | |
| 3046 | UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc, |
| 3047 | SourceLocation NamespcLoc, |
| 3048 | NestedNameSpecifierLoc QualifierLoc, |
| 3049 | SourceLocation IdentLoc, |
| 3050 | NamedDecl *Nominated, |
| 3051 | DeclContext *CommonAncestor) |
| 3052 | : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc), |
| 3053 | NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc), |
| 3054 | NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) {} |
| 3055 | |
| 3056 | /// Returns special DeclarationName used by using-directives. |
| 3057 | /// |
| 3058 | /// This is only used by DeclContext for storing UsingDirectiveDecls in |
| 3059 | /// its lookup structure. |
| 3060 | static DeclarationName getName() { |
| 3061 | return DeclarationName::getUsingDirectiveName(); |
| 3062 | } |
| 3063 | |
| 3064 | void anchor() override; |
| 3065 | |
| 3066 | public: |
| 3067 | friend class ASTDeclReader; |
| 3068 | |
| 3069 | // Friend for getUsingDirectiveName. |
| 3070 | friend class DeclContext; |
| 3071 | |
| 3072 | /// Retrieve the nested-name-specifier that qualifies the |
| 3073 | /// name of the namespace, with source-location information. |
| 3074 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
| 3075 | |
| 3076 | /// Retrieve the nested-name-specifier that qualifies the |
| 3077 | /// name of the namespace. |
| 3078 | NestedNameSpecifier *getQualifier() const { |
| 3079 | return QualifierLoc.getNestedNameSpecifier(); |
| 3080 | } |
| 3081 | |
| 3082 | NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; } |
| 3083 | const NamedDecl *getNominatedNamespaceAsWritten() const { |
| 3084 | return NominatedNamespace; |
| 3085 | } |
| 3086 | |
| 3087 | /// Returns the namespace nominated by this using-directive. |
| 3088 | NamespaceDecl *getNominatedNamespace(); |
| 3089 | |
| 3090 | const NamespaceDecl *getNominatedNamespace() const { |
| 3091 | return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace(); |
| 3092 | } |
| 3093 | |
| 3094 | /// Returns the common ancestor context of this using-directive and |
| 3095 | /// its nominated namespace. |
| 3096 | DeclContext *getCommonAncestor() { return CommonAncestor; } |
| 3097 | const DeclContext *getCommonAncestor() const { return CommonAncestor; } |
| 3098 | |
| 3099 | /// Return the location of the \c using keyword. |
| 3100 | SourceLocation getUsingLoc() const { return UsingLoc; } |
| 3101 | |
| 3102 | // FIXME: Could omit 'Key' in name. |
| 3103 | /// Returns the location of the \c namespace keyword. |
| 3104 | SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; } |
| 3105 | |
| 3106 | /// Returns the location of this using declaration's identifier. |
| 3107 | SourceLocation getIdentLocation() const { return getLocation(); } |
| 3108 | |
| 3109 | static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC, |
| 3110 | SourceLocation UsingLoc, |
| 3111 | SourceLocation NamespaceLoc, |
| 3112 | NestedNameSpecifierLoc QualifierLoc, |
| 3113 | SourceLocation IdentLoc, |
| 3114 | NamedDecl *Nominated, |
| 3115 | DeclContext *CommonAncestor); |
| 3116 | static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3117 | |
| 3118 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 3119 | return SourceRange(UsingLoc, getLocation()); |
| 3120 | } |
| 3121 | |
| 3122 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3123 | static bool classofKind(Kind K) { return K == UsingDirective; } |
| 3124 | }; |
| 3125 | |
| 3126 | /// Represents a C++ namespace alias. |
| 3127 | /// |
| 3128 | /// For example: |
| 3129 | /// |
| 3130 | /// \code |
| 3131 | /// namespace Foo = Bar; |
| 3132 | /// \endcode |
| 3133 | class NamespaceAliasDecl : public NamedDecl, |
| 3134 | public Redeclarable<NamespaceAliasDecl> { |
| 3135 | friend class ASTDeclReader; |
| 3136 | |
| 3137 | /// The location of the \c namespace keyword. |
| 3138 | SourceLocation NamespaceLoc; |
| 3139 | |
| 3140 | /// The location of the namespace's identifier. |
| 3141 | /// |
| 3142 | /// This is accessed by TargetNameLoc. |
| 3143 | SourceLocation IdentLoc; |
| 3144 | |
| 3145 | /// The nested-name-specifier that precedes the namespace. |
| 3146 | NestedNameSpecifierLoc QualifierLoc; |
| 3147 | |
| 3148 | /// The Decl that this alias points to, either a NamespaceDecl or |
| 3149 | /// a NamespaceAliasDecl. |
| 3150 | NamedDecl *Namespace; |
| 3151 | |
| 3152 | NamespaceAliasDecl(ASTContext &C, DeclContext *DC, |
| 3153 | SourceLocation NamespaceLoc, SourceLocation AliasLoc, |
| 3154 | IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc, |
| 3155 | SourceLocation IdentLoc, NamedDecl *Namespace) |
| 3156 | : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C), |
| 3157 | NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc), |
| 3158 | QualifierLoc(QualifierLoc), Namespace(Namespace) {} |
| 3159 | |
| 3160 | void anchor() override; |
| 3161 | |
| 3162 | using redeclarable_base = Redeclarable<NamespaceAliasDecl>; |
| 3163 | |
| 3164 | NamespaceAliasDecl *getNextRedeclarationImpl() override; |
| 3165 | NamespaceAliasDecl *getPreviousDeclImpl() override; |
| 3166 | NamespaceAliasDecl *getMostRecentDeclImpl() override; |
| 3167 | |
| 3168 | public: |
| 3169 | static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC, |
| 3170 | SourceLocation NamespaceLoc, |
| 3171 | SourceLocation AliasLoc, |
| 3172 | IdentifierInfo *Alias, |
| 3173 | NestedNameSpecifierLoc QualifierLoc, |
| 3174 | SourceLocation IdentLoc, |
| 3175 | NamedDecl *Namespace); |
| 3176 | |
| 3177 | static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3178 | |
| 3179 | using redecl_range = redeclarable_base::redecl_range; |
| 3180 | using redecl_iterator = redeclarable_base::redecl_iterator; |
| 3181 | |
| 3182 | using redeclarable_base::redecls_begin; |
| 3183 | using redeclarable_base::redecls_end; |
| 3184 | using redeclarable_base::redecls; |
| 3185 | using redeclarable_base::getPreviousDecl; |
| 3186 | using redeclarable_base::getMostRecentDecl; |
| 3187 | |
| 3188 | NamespaceAliasDecl *getCanonicalDecl() override { |
| 3189 | return getFirstDecl(); |
| 3190 | } |
| 3191 | const NamespaceAliasDecl *getCanonicalDecl() const { |
| 3192 | return getFirstDecl(); |
| 3193 | } |
| 3194 | |
| 3195 | /// Retrieve the nested-name-specifier that qualifies the |
| 3196 | /// name of the namespace, with source-location information. |
| 3197 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
| 3198 | |
| 3199 | /// Retrieve the nested-name-specifier that qualifies the |
| 3200 | /// name of the namespace. |
| 3201 | NestedNameSpecifier *getQualifier() const { |
| 3202 | return QualifierLoc.getNestedNameSpecifier(); |
| 3203 | } |
| 3204 | |
| 3205 | /// Retrieve the namespace declaration aliased by this directive. |
| 3206 | NamespaceDecl *getNamespace() { |
| 3207 | if (auto *AD = dyn_cast<NamespaceAliasDecl>(Namespace)) |
| 3208 | return AD->getNamespace(); |
| 3209 | |
| 3210 | return cast<NamespaceDecl>(Namespace); |
| 3211 | } |
| 3212 | |
| 3213 | const NamespaceDecl *getNamespace() const { |
| 3214 | return const_cast<NamespaceAliasDecl *>(this)->getNamespace(); |
| 3215 | } |
| 3216 | |
| 3217 | /// Returns the location of the alias name, i.e. 'foo' in |
| 3218 | /// "namespace foo = ns::bar;". |
| 3219 | SourceLocation getAliasLoc() const { return getLocation(); } |
| 3220 | |
| 3221 | /// Returns the location of the \c namespace keyword. |
| 3222 | SourceLocation getNamespaceLoc() const { return NamespaceLoc; } |
| 3223 | |
| 3224 | /// Returns the location of the identifier in the named namespace. |
| 3225 | SourceLocation getTargetNameLoc() const { return IdentLoc; } |
| 3226 | |
| 3227 | /// Retrieve the namespace that this alias refers to, which |
| 3228 | /// may either be a NamespaceDecl or a NamespaceAliasDecl. |
| 3229 | NamedDecl *getAliasedNamespace() const { return Namespace; } |
| 3230 | |
| 3231 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 3232 | return SourceRange(NamespaceLoc, IdentLoc); |
| 3233 | } |
| 3234 | |
| 3235 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3236 | static bool classofKind(Kind K) { return K == NamespaceAlias; } |
| 3237 | }; |
| 3238 | |
| 3239 | /// Represents a shadow declaration introduced into a scope by a |
| 3240 | /// (resolved) using declaration. |
| 3241 | /// |
| 3242 | /// For example, |
| 3243 | /// \code |
| 3244 | /// namespace A { |
| 3245 | /// void foo(); |
| 3246 | /// } |
| 3247 | /// namespace B { |
| 3248 | /// using A::foo; // <- a UsingDecl |
| 3249 | /// // Also creates a UsingShadowDecl for A::foo() in B |
| 3250 | /// } |
| 3251 | /// \endcode |
| 3252 | class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> { |
| 3253 | friend class UsingDecl; |
| 3254 | |
| 3255 | /// The referenced declaration. |
| 3256 | NamedDecl *Underlying = nullptr; |
| 3257 | |
| 3258 | /// The using declaration which introduced this decl or the next using |
| 3259 | /// shadow declaration contained in the aforementioned using declaration. |
| 3260 | NamedDecl *UsingOrNextShadow = nullptr; |
| 3261 | |
| 3262 | void anchor() override; |
| 3263 | |
| 3264 | using redeclarable_base = Redeclarable<UsingShadowDecl>; |
| 3265 | |
| 3266 | UsingShadowDecl *getNextRedeclarationImpl() override { |
| 3267 | return getNextRedeclaration(); |
| 3268 | } |
| 3269 | |
| 3270 | UsingShadowDecl *getPreviousDeclImpl() override { |
| 3271 | return getPreviousDecl(); |
| 3272 | } |
| 3273 | |
| 3274 | UsingShadowDecl *getMostRecentDeclImpl() override { |
| 3275 | return getMostRecentDecl(); |
| 3276 | } |
| 3277 | |
| 3278 | protected: |
| 3279 | UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC, SourceLocation Loc, |
| 3280 | UsingDecl *Using, NamedDecl *Target); |
| 3281 | UsingShadowDecl(Kind K, ASTContext &C, EmptyShell); |
| 3282 | |
| 3283 | public: |
| 3284 | friend class ASTDeclReader; |
| 3285 | friend class ASTDeclWriter; |
| 3286 | |
| 3287 | static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC, |
| 3288 | SourceLocation Loc, UsingDecl *Using, |
| 3289 | NamedDecl *Target) { |
| 3290 | return new (C, DC) UsingShadowDecl(UsingShadow, C, DC, Loc, Using, Target); |
| 3291 | } |
| 3292 | |
| 3293 | static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3294 | |
| 3295 | using redecl_range = redeclarable_base::redecl_range; |
| 3296 | using redecl_iterator = redeclarable_base::redecl_iterator; |
| 3297 | |
| 3298 | using redeclarable_base::redecls_begin; |
| 3299 | using redeclarable_base::redecls_end; |
| 3300 | using redeclarable_base::redecls; |
| 3301 | using redeclarable_base::getPreviousDecl; |
| 3302 | using redeclarable_base::getMostRecentDecl; |
| 3303 | using redeclarable_base::isFirstDecl; |
| 3304 | |
| 3305 | UsingShadowDecl *getCanonicalDecl() override { |
| 3306 | return getFirstDecl(); |
| 3307 | } |
| 3308 | const UsingShadowDecl *getCanonicalDecl() const { |
| 3309 | return getFirstDecl(); |
| 3310 | } |
| 3311 | |
| 3312 | /// Gets the underlying declaration which has been brought into the |
| 3313 | /// local scope. |
| 3314 | NamedDecl *getTargetDecl() const { return Underlying; } |
| 3315 | |
| 3316 | /// Sets the underlying declaration which has been brought into the |
| 3317 | /// local scope. |
| 3318 | void setTargetDecl(NamedDecl *ND) { |
| 3319 | assert(ND && "Target decl is null!")((ND && "Target decl is null!") ? static_cast<void > (0) : __assert_fail ("ND && \"Target decl is null!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h" , 3319, __PRETTY_FUNCTION__)); |
| 3320 | Underlying = ND; |
| 3321 | // A UsingShadowDecl is never a friend or local extern declaration, even |
| 3322 | // if it is a shadow declaration for one. |
| 3323 | IdentifierNamespace = |
| 3324 | ND->getIdentifierNamespace() & |
| 3325 | ~(IDNS_OrdinaryFriend | IDNS_TagFriend | IDNS_LocalExtern); |
| 3326 | } |
| 3327 | |
| 3328 | /// Gets the using declaration to which this declaration is tied. |
| 3329 | UsingDecl *getUsingDecl() const; |
| 3330 | |
| 3331 | /// The next using shadow declaration contained in the shadow decl |
| 3332 | /// chain of the using declaration which introduced this decl. |
| 3333 | UsingShadowDecl *getNextUsingShadowDecl() const { |
| 3334 | return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow); |
| 3335 | } |
| 3336 | |
| 3337 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3338 | static bool classofKind(Kind K) { |
| 3339 | return K == Decl::UsingShadow || K == Decl::ConstructorUsingShadow; |
| 3340 | } |
| 3341 | }; |
| 3342 | |
| 3343 | /// Represents a shadow constructor declaration introduced into a |
| 3344 | /// class by a C++11 using-declaration that names a constructor. |
| 3345 | /// |
| 3346 | /// For example: |
| 3347 | /// \code |
| 3348 | /// struct Base { Base(int); }; |
| 3349 | /// struct Derived { |
| 3350 | /// using Base::Base; // creates a UsingDecl and a ConstructorUsingShadowDecl |
| 3351 | /// }; |
| 3352 | /// \endcode |
| 3353 | class ConstructorUsingShadowDecl final : public UsingShadowDecl { |
| 3354 | /// If this constructor using declaration inherted the constructor |
| 3355 | /// from an indirect base class, this is the ConstructorUsingShadowDecl |
| 3356 | /// in the named direct base class from which the declaration was inherited. |
| 3357 | ConstructorUsingShadowDecl *NominatedBaseClassShadowDecl = nullptr; |
| 3358 | |
| 3359 | /// If this constructor using declaration inherted the constructor |
| 3360 | /// from an indirect base class, this is the ConstructorUsingShadowDecl |
| 3361 | /// that will be used to construct the unique direct or virtual base class |
| 3362 | /// that receives the constructor arguments. |
| 3363 | ConstructorUsingShadowDecl *ConstructedBaseClassShadowDecl = nullptr; |
| 3364 | |
| 3365 | /// \c true if the constructor ultimately named by this using shadow |
| 3366 | /// declaration is within a virtual base class subobject of the class that |
| 3367 | /// contains this declaration. |
| 3368 | unsigned IsVirtual : 1; |
| 3369 | |
| 3370 | ConstructorUsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc, |
| 3371 | UsingDecl *Using, NamedDecl *Target, |
| 3372 | bool TargetInVirtualBase) |
| 3373 | : UsingShadowDecl(ConstructorUsingShadow, C, DC, Loc, Using, |
| 3374 | Target->getUnderlyingDecl()), |
| 3375 | NominatedBaseClassShadowDecl( |
| 3376 | dyn_cast<ConstructorUsingShadowDecl>(Target)), |
| 3377 | ConstructedBaseClassShadowDecl(NominatedBaseClassShadowDecl), |
| 3378 | IsVirtual(TargetInVirtualBase) { |
| 3379 | // If we found a constructor that chains to a constructor for a virtual |
| 3380 | // base, we should directly call that virtual base constructor instead. |
| 3381 | // FIXME: This logic belongs in Sema. |
| 3382 | if (NominatedBaseClassShadowDecl && |
| 3383 | NominatedBaseClassShadowDecl->constructsVirtualBase()) { |
| 3384 | ConstructedBaseClassShadowDecl = |
| 3385 | NominatedBaseClassShadowDecl->ConstructedBaseClassShadowDecl; |
| 3386 | IsVirtual = true; |
| 3387 | } |
| 3388 | } |
| 3389 | |
| 3390 | ConstructorUsingShadowDecl(ASTContext &C, EmptyShell Empty) |
| 3391 | : UsingShadowDecl(ConstructorUsingShadow, C, Empty), IsVirtual(false) {} |
| 3392 | |
| 3393 | void anchor() override; |
| 3394 | |
| 3395 | public: |
| 3396 | friend class ASTDeclReader; |
| 3397 | friend class ASTDeclWriter; |
| 3398 | |
| 3399 | static ConstructorUsingShadowDecl *Create(ASTContext &C, DeclContext *DC, |
| 3400 | SourceLocation Loc, |
| 3401 | UsingDecl *Using, NamedDecl *Target, |
| 3402 | bool IsVirtual); |
| 3403 | static ConstructorUsingShadowDecl *CreateDeserialized(ASTContext &C, |
| 3404 | unsigned ID); |
| 3405 | |
| 3406 | /// Returns the parent of this using shadow declaration, which |
| 3407 | /// is the class in which this is declared. |
| 3408 | //@{ |
| 3409 | const CXXRecordDecl *getParent() const { |
| 3410 | return cast<CXXRecordDecl>(getDeclContext()); |
| 3411 | } |
| 3412 | CXXRecordDecl *getParent() { |
| 3413 | return cast<CXXRecordDecl>(getDeclContext()); |
| 3414 | } |
| 3415 | //@} |
| 3416 | |
| 3417 | /// Get the inheriting constructor declaration for the direct base |
| 3418 | /// class from which this using shadow declaration was inherited, if there is |
| 3419 | /// one. This can be different for each redeclaration of the same shadow decl. |
| 3420 | ConstructorUsingShadowDecl *getNominatedBaseClassShadowDecl() const { |
| 3421 | return NominatedBaseClassShadowDecl; |
| 3422 | } |
| 3423 | |
| 3424 | /// Get the inheriting constructor declaration for the base class |
| 3425 | /// for which we don't have an explicit initializer, if there is one. |
| 3426 | ConstructorUsingShadowDecl *getConstructedBaseClassShadowDecl() const { |
| 3427 | return ConstructedBaseClassShadowDecl; |
| 3428 | } |
| 3429 | |
| 3430 | /// Get the base class that was named in the using declaration. This |
| 3431 | /// can be different for each redeclaration of this same shadow decl. |
| 3432 | CXXRecordDecl *getNominatedBaseClass() const; |
| 3433 | |
| 3434 | /// Get the base class whose constructor or constructor shadow |
| 3435 | /// declaration is passed the constructor arguments. |
| 3436 | CXXRecordDecl *getConstructedBaseClass() const { |
| 3437 | return cast<CXXRecordDecl>((ConstructedBaseClassShadowDecl |
| 3438 | ? ConstructedBaseClassShadowDecl |
| 3439 | : getTargetDecl()) |
| 3440 | ->getDeclContext()); |
| 3441 | } |
| 3442 | |
| 3443 | /// Returns \c true if the constructed base class is a virtual base |
| 3444 | /// class subobject of this declaration's class. |
| 3445 | bool constructsVirtualBase() const { |
| 3446 | return IsVirtual; |
| 3447 | } |
| 3448 | |
| 3449 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3450 | static bool classofKind(Kind K) { return K == ConstructorUsingShadow; } |
| 3451 | }; |
| 3452 | |
| 3453 | /// Represents a C++ using-declaration. |
| 3454 | /// |
| 3455 | /// For example: |
| 3456 | /// \code |
| 3457 | /// using someNameSpace::someIdentifier; |
| 3458 | /// \endcode |
| 3459 | class UsingDecl : public NamedDecl, public Mergeable<UsingDecl> { |
| 3460 | /// The source location of the 'using' keyword itself. |
| 3461 | SourceLocation UsingLocation; |
| 3462 | |
| 3463 | /// The nested-name-specifier that precedes the name. |
| 3464 | NestedNameSpecifierLoc QualifierLoc; |
| 3465 | |
| 3466 | /// Provides source/type location info for the declaration name |
| 3467 | /// embedded in the ValueDecl base class. |
| 3468 | DeclarationNameLoc DNLoc; |
| 3469 | |
| 3470 | /// The first shadow declaration of the shadow decl chain associated |
| 3471 | /// with this using declaration. |
| 3472 | /// |
| 3473 | /// The bool member of the pair store whether this decl has the \c typename |
| 3474 | /// keyword. |
| 3475 | llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow; |
| 3476 | |
| 3477 | UsingDecl(DeclContext *DC, SourceLocation UL, |
| 3478 | NestedNameSpecifierLoc QualifierLoc, |
| 3479 | const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword) |
| 3480 | : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()), |
| 3481 | UsingLocation(UL), QualifierLoc(QualifierLoc), |
| 3482 | DNLoc(NameInfo.getInfo()), FirstUsingShadow(nullptr, HasTypenameKeyword) { |
| 3483 | } |
| 3484 | |
| 3485 | void anchor() override; |
| 3486 | |
| 3487 | public: |
| 3488 | friend class ASTDeclReader; |
| 3489 | friend class ASTDeclWriter; |
| 3490 | |
| 3491 | /// Return the source location of the 'using' keyword. |
| 3492 | SourceLocation getUsingLoc() const { return UsingLocation; } |
| 3493 | |
| 3494 | /// Set the source location of the 'using' keyword. |
| 3495 | void setUsingLoc(SourceLocation L) { UsingLocation = L; } |
| 3496 | |
| 3497 | /// Retrieve the nested-name-specifier that qualifies the name, |
| 3498 | /// with source-location information. |
| 3499 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
| 3500 | |
| 3501 | /// Retrieve the nested-name-specifier that qualifies the name. |
| 3502 | NestedNameSpecifier *getQualifier() const { |
| 3503 | return QualifierLoc.getNestedNameSpecifier(); |
| 3504 | } |
| 3505 | |
| 3506 | DeclarationNameInfo getNameInfo() const { |
| 3507 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
| 3508 | } |
| 3509 | |
| 3510 | /// Return true if it is a C++03 access declaration (no 'using'). |
| 3511 | bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } |
| 3512 | |
| 3513 | /// Return true if the using declaration has 'typename'. |
| 3514 | bool hasTypename() const { return FirstUsingShadow.getInt(); } |
| 3515 | |
| 3516 | /// Sets whether the using declaration has 'typename'. |
| 3517 | void setTypename(bool TN) { FirstUsingShadow.setInt(TN); } |
| 3518 | |
| 3519 | /// Iterates through the using shadow declarations associated with |
| 3520 | /// this using declaration. |
| 3521 | class shadow_iterator { |
| 3522 | /// The current using shadow declaration. |
| 3523 | UsingShadowDecl *Current = nullptr; |
| 3524 | |
| 3525 | public: |
| 3526 | using value_type = UsingShadowDecl *; |
| 3527 | using reference = UsingShadowDecl *; |
| 3528 | using pointer = UsingShadowDecl *; |
| 3529 | using iterator_category = std::forward_iterator_tag; |
| 3530 | using difference_type = std::ptrdiff_t; |
| 3531 | |
| 3532 | shadow_iterator() = default; |
| 3533 | explicit shadow_iterator(UsingShadowDecl *C) : Current(C) {} |
| 3534 | |
| 3535 | reference operator*() const { return Current; } |
| 3536 | pointer operator->() const { return Current; } |
| 3537 | |
| 3538 | shadow_iterator& operator++() { |
| 3539 | Current = Current->getNextUsingShadowDecl(); |
| 3540 | return *this; |
| 3541 | } |
| 3542 | |
| 3543 | shadow_iterator operator++(int) { |
| 3544 | shadow_iterator tmp(*this); |
| 3545 | ++(*this); |
| 3546 | return tmp; |
| 3547 | } |
| 3548 | |
| 3549 | friend bool operator==(shadow_iterator x, shadow_iterator y) { |
| 3550 | return x.Current == y.Current; |
| 3551 | } |
| 3552 | friend bool operator!=(shadow_iterator x, shadow_iterator y) { |
| 3553 | return x.Current != y.Current; |
| 3554 | } |
| 3555 | }; |
| 3556 | |
| 3557 | using shadow_range = llvm::iterator_range<shadow_iterator>; |
| 3558 | |
| 3559 | shadow_range shadows() const { |
| 3560 | return shadow_range(shadow_begin(), shadow_end()); |
| 3561 | } |
| 3562 | |
| 3563 | shadow_iterator shadow_begin() const { |
| 3564 | return shadow_iterator(FirstUsingShadow.getPointer()); |
| 3565 | } |
| 3566 | |
| 3567 | shadow_iterator shadow_end() const { return shadow_iterator(); } |
| 3568 | |
| 3569 | /// Return the number of shadowed declarations associated with this |
| 3570 | /// using declaration. |
| 3571 | unsigned shadow_size() const { |
| 3572 | return std::distance(shadow_begin(), shadow_end()); |
| 3573 | } |
| 3574 | |
| 3575 | void addShadowDecl(UsingShadowDecl *S); |
| 3576 | void removeShadowDecl(UsingShadowDecl *S); |
| 3577 | |
| 3578 | static UsingDecl *Create(ASTContext &C, DeclContext *DC, |
| 3579 | SourceLocation UsingL, |
| 3580 | NestedNameSpecifierLoc QualifierLoc, |
| 3581 | const DeclarationNameInfo &NameInfo, |
| 3582 | bool HasTypenameKeyword); |
| 3583 | |
| 3584 | static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3585 | |
| 3586 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
| 3587 | |
| 3588 | /// Retrieves the canonical declaration of this declaration. |
| 3589 | UsingDecl *getCanonicalDecl() override { return getFirstDecl(); } |
| 3590 | const UsingDecl *getCanonicalDecl() const { return getFirstDecl(); } |
| 3591 | |
| 3592 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3593 | static bool classofKind(Kind K) { return K == Using; } |
| 3594 | }; |
| 3595 | |
| 3596 | /// Represents a pack of using declarations that a single |
| 3597 | /// using-declarator pack-expanded into. |
| 3598 | /// |
| 3599 | /// \code |
| 3600 | /// template<typename ...T> struct X : T... { |
| 3601 | /// using T::operator()...; |
| 3602 | /// using T::operator T...; |
| 3603 | /// }; |
| 3604 | /// \endcode |
| 3605 | /// |
| 3606 | /// In the second case above, the UsingPackDecl will have the name |
| 3607 | /// 'operator T' (which contains an unexpanded pack), but the individual |
| 3608 | /// UsingDecls and UsingShadowDecls will have more reasonable names. |
| 3609 | class UsingPackDecl final |
| 3610 | : public NamedDecl, public Mergeable<UsingPackDecl>, |
| 3611 | private llvm::TrailingObjects<UsingPackDecl, NamedDecl *> { |
| 3612 | /// The UnresolvedUsingValueDecl or UnresolvedUsingTypenameDecl from |
| 3613 | /// which this waas instantiated. |
| 3614 | NamedDecl *InstantiatedFrom; |
| 3615 | |
| 3616 | /// The number of using-declarations created by this pack expansion. |
| 3617 | unsigned NumExpansions; |
| 3618 | |
| 3619 | UsingPackDecl(DeclContext *DC, NamedDecl *InstantiatedFrom, |
| 3620 | ArrayRef<NamedDecl *> UsingDecls) |
| 3621 | : NamedDecl(UsingPack, DC, |
| 3622 | InstantiatedFrom ? InstantiatedFrom->getLocation() |
| 3623 | : SourceLocation(), |
| 3624 | InstantiatedFrom ? InstantiatedFrom->getDeclName() |
| 3625 | : DeclarationName()), |
| 3626 | InstantiatedFrom(InstantiatedFrom), NumExpansions(UsingDecls.size()) { |
| 3627 | std::uninitialized_copy(UsingDecls.begin(), UsingDecls.end(), |
| 3628 | getTrailingObjects<NamedDecl *>()); |
| 3629 | } |
| 3630 | |
| 3631 | void anchor() override; |
| 3632 | |
| 3633 | public: |
| 3634 | friend class ASTDeclReader; |
| 3635 | friend class ASTDeclWriter; |
| 3636 | friend TrailingObjects; |
| 3637 | |
| 3638 | /// Get the using declaration from which this was instantiated. This will |
| 3639 | /// always be an UnresolvedUsingValueDecl or an UnresolvedUsingTypenameDecl |
| 3640 | /// that is a pack expansion. |
| 3641 | NamedDecl *getInstantiatedFromUsingDecl() const { return InstantiatedFrom; } |
| 3642 | |
| 3643 | /// Get the set of using declarations that this pack expanded into. Note that |
| 3644 | /// some of these may still be unresolved. |
| 3645 | ArrayRef<NamedDecl *> expansions() const { |
| 3646 | return llvm::makeArrayRef(getTrailingObjects<NamedDecl *>(), NumExpansions); |
| 3647 | } |
| 3648 | |
| 3649 | static UsingPackDecl *Create(ASTContext &C, DeclContext *DC, |
| 3650 | NamedDecl *InstantiatedFrom, |
| 3651 | ArrayRef<NamedDecl *> UsingDecls); |
| 3652 | |
| 3653 | static UsingPackDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
| 3654 | unsigned NumExpansions); |
| 3655 | |
| 3656 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 3657 | return InstantiatedFrom->getSourceRange(); |
| 3658 | } |
| 3659 | |
| 3660 | UsingPackDecl *getCanonicalDecl() override { return getFirstDecl(); } |
| 3661 | const UsingPackDecl *getCanonicalDecl() const { return getFirstDecl(); } |
| 3662 | |
| 3663 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3664 | static bool classofKind(Kind K) { return K == UsingPack; } |
| 3665 | }; |
| 3666 | |
| 3667 | /// Represents a dependent using declaration which was not marked with |
| 3668 | /// \c typename. |
| 3669 | /// |
| 3670 | /// Unlike non-dependent using declarations, these *only* bring through |
| 3671 | /// non-types; otherwise they would break two-phase lookup. |
| 3672 | /// |
| 3673 | /// \code |
| 3674 | /// template \<class T> class A : public Base<T> { |
| 3675 | /// using Base<T>::foo; |
| 3676 | /// }; |
| 3677 | /// \endcode |
| 3678 | class UnresolvedUsingValueDecl : public ValueDecl, |
| 3679 | public Mergeable<UnresolvedUsingValueDecl> { |
| 3680 | /// The source location of the 'using' keyword |
| 3681 | SourceLocation UsingLocation; |
| 3682 | |
| 3683 | /// If this is a pack expansion, the location of the '...'. |
| 3684 | SourceLocation EllipsisLoc; |
| 3685 | |
| 3686 | /// The nested-name-specifier that precedes the name. |
| 3687 | NestedNameSpecifierLoc QualifierLoc; |
| 3688 | |
| 3689 | /// Provides source/type location info for the declaration name |
| 3690 | /// embedded in the ValueDecl base class. |
| 3691 | DeclarationNameLoc DNLoc; |
| 3692 | |
| 3693 | UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty, |
| 3694 | SourceLocation UsingLoc, |
| 3695 | NestedNameSpecifierLoc QualifierLoc, |
| 3696 | const DeclarationNameInfo &NameInfo, |
| 3697 | SourceLocation EllipsisLoc) |
| 3698 | : ValueDecl(UnresolvedUsingValue, DC, |
| 3699 | NameInfo.getLoc(), NameInfo.getName(), Ty), |
| 3700 | UsingLocation(UsingLoc), EllipsisLoc(EllipsisLoc), |
| 3701 | QualifierLoc(QualifierLoc), DNLoc(NameInfo.getInfo()) {} |
| 3702 | |
| 3703 | void anchor() override; |
| 3704 | |
| 3705 | public: |
| 3706 | friend class ASTDeclReader; |
| 3707 | friend class ASTDeclWriter; |
| 3708 | |
| 3709 | /// Returns the source location of the 'using' keyword. |
| 3710 | SourceLocation getUsingLoc() const { return UsingLocation; } |
| 3711 | |
| 3712 | /// Set the source location of the 'using' keyword. |
| 3713 | void setUsingLoc(SourceLocation L) { UsingLocation = L; } |
| 3714 | |
| 3715 | /// Return true if it is a C++03 access declaration (no 'using'). |
| 3716 | bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } |
| 3717 | |
| 3718 | /// Retrieve the nested-name-specifier that qualifies the name, |
| 3719 | /// with source-location information. |
| 3720 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
| 3721 | |
| 3722 | /// Retrieve the nested-name-specifier that qualifies the name. |
| 3723 | NestedNameSpecifier *getQualifier() const { |
| 3724 | return QualifierLoc.getNestedNameSpecifier(); |
| 3725 | } |
| 3726 | |
| 3727 | DeclarationNameInfo getNameInfo() const { |
| 3728 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
| 3729 | } |
| 3730 | |
| 3731 | /// Determine whether this is a pack expansion. |
| 3732 | bool isPackExpansion() const { |
| 3733 | return EllipsisLoc.isValid(); |
| 3734 | } |
| 3735 | |
| 3736 | /// Get the location of the ellipsis if this is a pack expansion. |
| 3737 | SourceLocation getEllipsisLoc() const { |
| 3738 | return EllipsisLoc; |
| 3739 | } |
| 3740 | |
| 3741 | static UnresolvedUsingValueDecl * |
| 3742 | Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, |
| 3743 | NestedNameSpecifierLoc QualifierLoc, |
| 3744 | const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc); |
| 3745 | |
| 3746 | static UnresolvedUsingValueDecl * |
| 3747 | CreateDeserialized(ASTContext &C, unsigned ID); |
| 3748 | |
| 3749 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
| 3750 | |
| 3751 | /// Retrieves the canonical declaration of this declaration. |
| 3752 | UnresolvedUsingValueDecl *getCanonicalDecl() override { |
| 3753 | return getFirstDecl(); |
| 3754 | } |
| 3755 | const UnresolvedUsingValueDecl *getCanonicalDecl() const { |
| 3756 | return getFirstDecl(); |
| 3757 | } |
| 3758 | |
| 3759 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3760 | static bool classofKind(Kind K) { return K == UnresolvedUsingValue; } |
| 3761 | }; |
| 3762 | |
| 3763 | /// Represents a dependent using declaration which was marked with |
| 3764 | /// \c typename. |
| 3765 | /// |
| 3766 | /// \code |
| 3767 | /// template \<class T> class A : public Base<T> { |
| 3768 | /// using typename Base<T>::foo; |
| 3769 | /// }; |
| 3770 | /// \endcode |
| 3771 | /// |
| 3772 | /// The type associated with an unresolved using typename decl is |
| 3773 | /// currently always a typename type. |
| 3774 | class UnresolvedUsingTypenameDecl |
| 3775 | : public TypeDecl, |
| 3776 | public Mergeable<UnresolvedUsingTypenameDecl> { |
| 3777 | friend class ASTDeclReader; |
| 3778 | |
| 3779 | /// The source location of the 'typename' keyword |
| 3780 | SourceLocation TypenameLocation; |
| 3781 | |
| 3782 | /// If this is a pack expansion, the location of the '...'. |
| 3783 | SourceLocation EllipsisLoc; |
| 3784 | |
| 3785 | /// The nested-name-specifier that precedes the name. |
| 3786 | NestedNameSpecifierLoc QualifierLoc; |
| 3787 | |
| 3788 | UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc, |
| 3789 | SourceLocation TypenameLoc, |
| 3790 | NestedNameSpecifierLoc QualifierLoc, |
| 3791 | SourceLocation TargetNameLoc, |
| 3792 | IdentifierInfo *TargetName, |
| 3793 | SourceLocation EllipsisLoc) |
| 3794 | : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName, |
| 3795 | UsingLoc), |
| 3796 | TypenameLocation(TypenameLoc), EllipsisLoc(EllipsisLoc), |
| 3797 | QualifierLoc(QualifierLoc) {} |
| 3798 | |
| 3799 | void anchor() override; |
| 3800 | |
| 3801 | public: |
| 3802 | /// Returns the source location of the 'using' keyword. |
| 3803 | SourceLocation getUsingLoc() const { return getBeginLoc(); } |
| 3804 | |
| 3805 | /// Returns the source location of the 'typename' keyword. |
| 3806 | SourceLocation getTypenameLoc() const { return TypenameLocation; } |
| 3807 | |
| 3808 | /// Retrieve the nested-name-specifier that qualifies the name, |
| 3809 | /// with source-location information. |
| 3810 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
| 3811 | |
| 3812 | /// Retrieve the nested-name-specifier that qualifies the name. |
| 3813 | NestedNameSpecifier *getQualifier() const { |
| 3814 | return QualifierLoc.getNestedNameSpecifier(); |
| 3815 | } |
| 3816 | |
| 3817 | DeclarationNameInfo getNameInfo() const { |
| 3818 | return DeclarationNameInfo(getDeclName(), getLocation()); |
| 3819 | } |
| 3820 | |
| 3821 | /// Determine whether this is a pack expansion. |
| 3822 | bool isPackExpansion() const { |
| 3823 | return EllipsisLoc.isValid(); |
| 3824 | } |
| 3825 | |
| 3826 | /// Get the location of the ellipsis if this is a pack expansion. |
| 3827 | SourceLocation getEllipsisLoc() const { |
| 3828 | return EllipsisLoc; |
| 3829 | } |
| 3830 | |
| 3831 | static UnresolvedUsingTypenameDecl * |
| 3832 | Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, |
| 3833 | SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc, |
| 3834 | SourceLocation TargetNameLoc, DeclarationName TargetName, |
| 3835 | SourceLocation EllipsisLoc); |
| 3836 | |
| 3837 | static UnresolvedUsingTypenameDecl * |
| 3838 | CreateDeserialized(ASTContext &C, unsigned ID); |
| 3839 | |
| 3840 | /// Retrieves the canonical declaration of this declaration. |
| 3841 | UnresolvedUsingTypenameDecl *getCanonicalDecl() override { |
| 3842 | return getFirstDecl(); |
| 3843 | } |
| 3844 | const UnresolvedUsingTypenameDecl *getCanonicalDecl() const { |
| 3845 | return getFirstDecl(); |
| 3846 | } |
| 3847 | |
| 3848 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3849 | static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; } |
| 3850 | }; |
| 3851 | |
| 3852 | /// Represents a C++11 static_assert declaration. |
| 3853 | class StaticAssertDecl : public Decl { |
| 3854 | llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed; |
| 3855 | StringLiteral *Message; |
| 3856 | SourceLocation RParenLoc; |
| 3857 | |
| 3858 | StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc, |
| 3859 | Expr *AssertExpr, StringLiteral *Message, |
| 3860 | SourceLocation RParenLoc, bool Failed) |
| 3861 | : Decl(StaticAssert, DC, StaticAssertLoc), |
| 3862 | AssertExprAndFailed(AssertExpr, Failed), Message(Message), |
| 3863 | RParenLoc(RParenLoc) {} |
| 3864 | |
| 3865 | virtual void anchor(); |
| 3866 | |
| 3867 | public: |
| 3868 | friend class ASTDeclReader; |
| 3869 | |
| 3870 | static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC, |
| 3871 | SourceLocation StaticAssertLoc, |
| 3872 | Expr *AssertExpr, StringLiteral *Message, |
| 3873 | SourceLocation RParenLoc, bool Failed); |
| 3874 | static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3875 | |
| 3876 | Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); } |
| 3877 | const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); } |
| 3878 | |
| 3879 | StringLiteral *getMessage() { return Message; } |
| 3880 | const StringLiteral *getMessage() const { return Message; } |
| 3881 | |
| 3882 | bool isFailed() const { return AssertExprAndFailed.getInt(); } |
| 3883 | |
| 3884 | SourceLocation getRParenLoc() const { return RParenLoc; } |
| 3885 | |
| 3886 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
| 3887 | return SourceRange(getLocation(), getRParenLoc()); |
| 3888 | } |
| 3889 | |
| 3890 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3891 | static bool classofKind(Kind K) { return K == StaticAssert; } |
| 3892 | }; |
| 3893 | |
| 3894 | /// A binding in a decomposition declaration. For instance, given: |
| 3895 | /// |
| 3896 | /// int n[3]; |
| 3897 | /// auto &[a, b, c] = n; |
| 3898 | /// |
| 3899 | /// a, b, and c are BindingDecls, whose bindings are the expressions |
| 3900 | /// x[0], x[1], and x[2] respectively, where x is the implicit |
| 3901 | /// DecompositionDecl of type 'int (&)[3]'. |
| 3902 | class BindingDecl : public ValueDecl { |
| 3903 | /// The declaration that this binding binds to part of. |
| 3904 | LazyDeclPtr Decomp; |
| 3905 | /// The binding represented by this declaration. References to this |
| 3906 | /// declaration are effectively equivalent to this expression (except |
| 3907 | /// that it is only evaluated once at the point of declaration of the |
| 3908 | /// binding). |
| 3909 | Expr *Binding = nullptr; |
| 3910 | |
| 3911 | BindingDecl(DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id) |
| 3912 | : ValueDecl(Decl::Binding, DC, IdLoc, Id, QualType()) {} |
| 3913 | |
| 3914 | void anchor() override; |
| 3915 | |
| 3916 | public: |
| 3917 | friend class ASTDeclReader; |
| 3918 | |
| 3919 | static BindingDecl *Create(ASTContext &C, DeclContext *DC, |
| 3920 | SourceLocation IdLoc, IdentifierInfo *Id); |
| 3921 | static BindingDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 3922 | |
| 3923 | /// Get the expression to which this declaration is bound. This may be null |
| 3924 | /// in two different cases: while parsing the initializer for the |
| 3925 | /// decomposition declaration, and when the initializer is type-dependent. |
| 3926 | Expr *getBinding() const { return Binding; } |
| 3927 | |
| 3928 | /// Get the decomposition declaration that this binding represents a |
| 3929 | /// decomposition of. |
| 3930 | ValueDecl *getDecomposedDecl() const; |
| 3931 | |
| 3932 | /// Get the variable (if any) that holds the value of evaluating the binding. |
| 3933 | /// Only present for user-defined bindings for tuple-like types. |
| 3934 | VarDecl *getHoldingVar() const; |
| 3935 | |
| 3936 | /// Set the binding for this BindingDecl, along with its declared type (which |
| 3937 | /// should be a possibly-cv-qualified form of the type of the binding, or a |
| 3938 | /// reference to such a type). |
| 3939 | void setBinding(QualType DeclaredType, Expr *Binding) { |
| 3940 | setType(DeclaredType); |
| 3941 | this->Binding = Binding; |
| 3942 | } |
| 3943 | |
| 3944 | /// Set the decomposed variable for this BindingDecl. |
| 3945 | void setDecomposedDecl(ValueDecl *Decomposed) { Decomp = Decomposed; } |
| 3946 | |
| 3947 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 3948 | static bool classofKind(Kind K) { return K == Decl::Binding; } |
| 3949 | }; |
| 3950 | |
| 3951 | /// A decomposition declaration. For instance, given: |
| 3952 | /// |
| 3953 | /// int n[3]; |
| 3954 | /// auto &[a, b, c] = n; |
| 3955 | /// |
| 3956 | /// the second line declares a DecompositionDecl of type 'int (&)[3]', and |
| 3957 | /// three BindingDecls (named a, b, and c). An instance of this class is always |
| 3958 | /// unnamed, but behaves in almost all other respects like a VarDecl. |
| 3959 | class DecompositionDecl final |
| 3960 | : public VarDecl, |
| 3961 | private llvm::TrailingObjects<DecompositionDecl, BindingDecl *> { |
| 3962 | /// The number of BindingDecl*s following this object. |
| 3963 | unsigned NumBindings; |
| 3964 | |
| 3965 | DecompositionDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
| 3966 | SourceLocation LSquareLoc, QualType T, |
| 3967 | TypeSourceInfo *TInfo, StorageClass SC, |
| 3968 | ArrayRef<BindingDecl *> Bindings) |
| 3969 | : VarDecl(Decomposition, C, DC, StartLoc, LSquareLoc, nullptr, T, TInfo, |
| 3970 | SC), |
| 3971 | NumBindings(Bindings.size()) { |
| 3972 | std::uninitialized_copy(Bindings.begin(), Bindings.end(), |
| 3973 | getTrailingObjects<BindingDecl *>()); |
| 3974 | for (auto *B : Bindings) |
| 3975 | B->setDecomposedDecl(this); |
| 3976 | } |
| 3977 | |
| 3978 | void anchor() override; |
| 3979 | |
| 3980 | public: |
| 3981 | friend class ASTDeclReader; |
| 3982 | friend TrailingObjects; |
| 3983 | |
| 3984 | static DecompositionDecl *Create(ASTContext &C, DeclContext *DC, |
| 3985 | SourceLocation StartLoc, |
| 3986 | SourceLocation LSquareLoc, |
| 3987 | QualType T, TypeSourceInfo *TInfo, |
| 3988 | StorageClass S, |
| 3989 | ArrayRef<BindingDecl *> Bindings); |
| 3990 | static DecompositionDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
| 3991 | unsigned NumBindings); |
| 3992 | |
| 3993 | ArrayRef<BindingDecl *> bindings() const { |
| 3994 | return llvm::makeArrayRef(getTrailingObjects<BindingDecl *>(), NumBindings); |
| 3995 | } |
| 3996 | |
| 3997 | void printName(raw_ostream &os) const override; |
| 3998 | |
| 3999 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
| 4000 | static bool classofKind(Kind K) { return K == Decomposition; } |
| 4001 | }; |
| 4002 | |
| 4003 | /// An instance of this class represents the declaration of a property |
| 4004 | /// member. This is a Microsoft extension to C++, first introduced in |
| 4005 | /// Visual Studio .NET 2003 as a parallel to similar features in C# |
| 4006 | /// and Managed C++. |
| 4007 | /// |
| 4008 | /// A property must always be a non-static class member. |
| 4009 | /// |
| 4010 | /// A property member superficially resembles a non-static data |
| 4011 | /// member, except preceded by a property attribute: |
| 4012 | /// __declspec(property(get=GetX, put=PutX)) int x; |
| 4013 | /// Either (but not both) of the 'get' and 'put' names may be omitted. |
| 4014 | /// |
| 4015 | /// A reference to a property is always an lvalue. If the lvalue |
| 4016 | /// undergoes lvalue-to-rvalue conversion, then a getter name is |
| 4017 | /// required, and that member is called with no arguments. |
| 4018 | /// If the lvalue is assigned into, then a setter name is required, |
| 4019 | /// and that member is called with one argument, the value assigned. |
| 4020 | /// Both operations are potentially overloaded. Compound assignments |
| 4021 | /// are permitted, as are the increment and decrement operators. |
| 4022 | /// |
| 4023 | /// The getter and putter methods are permitted to be overloaded, |
| 4024 | /// although their return and parameter types are subject to certain |
| 4025 | /// restrictions according to the type of the property. |
| 4026 | /// |
| 4027 | /// A property declared using an incomplete array type may |
| 4028 | /// additionally be subscripted, adding extra parameters to the getter |
| 4029 | /// and putter methods. |
| 4030 | class MSPropertyDecl : public DeclaratorDecl { |
| 4031 | IdentifierInfo *GetterId, *SetterId; |
| 4032 | |
| 4033 | MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N, |
| 4034 | QualType T, TypeSourceInfo *TInfo, SourceLocation StartL, |
| 4035 | IdentifierInfo *Getter, IdentifierInfo *Setter) |
| 4036 | : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL), |
| 4037 | GetterId(Getter), SetterId(Setter) {} |
| 4038 | |
| 4039 | void anchor() override; |
| 4040 | public: |
| 4041 | friend class ASTDeclReader; |
| 4042 | |
| 4043 | static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC, |
| 4044 | SourceLocation L, DeclarationName N, QualType T, |
| 4045 | TypeSourceInfo *TInfo, SourceLocation StartL, |
| 4046 | IdentifierInfo *Getter, IdentifierInfo *Setter); |
| 4047 | static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
| 4048 | |
| 4049 | static bool classof(const Decl *D) { return D->getKind() == MSProperty; } |
| 4050 | |
| 4051 | bool hasGetter() const { return GetterId != nullptr; } |
| 4052 | IdentifierInfo* getGetterId() const { return GetterId; } |
| 4053 | bool hasSetter() const { return SetterId != nullptr; } |
| 4054 | IdentifierInfo* getSetterId() const { return SetterId; } |
| 4055 | }; |
| 4056 | |
| 4057 | /// Insertion operator for diagnostics. This allows sending an AccessSpecifier |
| 4058 | /// into a diagnostic with <<. |
| 4059 | const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, |
| 4060 | AccessSpecifier AS); |
| 4061 | |
| 4062 | const PartialDiagnostic &operator<<(const PartialDiagnostic &DB, |
| 4063 | AccessSpecifier AS); |
| 4064 | |
| 4065 | } // namespace clang |
| 4066 | |
| 4067 | #endif // LLVM_CLANG_AST_DECLCXX_H |