| File: | clang/include/clang/AST/ExprCXX.h |
| Warning: | line 4695, column 18 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/Basic/Builtins.h" | ||||||||||
| 22 | #include "clang/Lex/Preprocessor.h" | ||||||||||
| 23 | #include "clang/Sema/Initialization.h" | ||||||||||
| 24 | #include "clang/Sema/Overload.h" | ||||||||||
| 25 | #include "clang/Sema/ScopeInfo.h" | ||||||||||
| 26 | #include "clang/Sema/SemaInternal.h" | ||||||||||
| 27 | #include "llvm/ADT/SmallSet.h" | ||||||||||
| 28 | |||||||||||
| 29 | using namespace clang; | ||||||||||
| 30 | using namespace sema; | ||||||||||
| 31 | |||||||||||
| 32 | static LookupResult lookupMember(Sema &S, const char *Name, CXXRecordDecl *RD, | ||||||||||
| 33 | SourceLocation Loc, bool &Res) { | ||||||||||
| 34 | DeclarationName DN = S.PP.getIdentifierInfo(Name); | ||||||||||
| 35 | LookupResult LR(S, DN, Loc, Sema::LookupMemberName); | ||||||||||
| 36 | // Suppress diagnostics when a private member is selected. The same warnings | ||||||||||
| 37 | // will be produced again when building the call. | ||||||||||
| 38 | LR.suppressDiagnostics(); | ||||||||||
| 39 | Res = S.LookupQualifiedName(LR, RD); | ||||||||||
| 40 | return LR; | ||||||||||
| 41 | } | ||||||||||
| 42 | |||||||||||
| 43 | static bool lookupMember(Sema &S, const char *Name, CXXRecordDecl *RD, | ||||||||||
| 44 | SourceLocation Loc) { | ||||||||||
| 45 | bool Res; | ||||||||||
| 46 | lookupMember(S, Name, RD, Loc, Res); | ||||||||||
| 47 | return Res; | ||||||||||
| 48 | } | ||||||||||
| 49 | |||||||||||
| 50 | /// Look up the std::coroutine_traits<...>::promise_type for the given | ||||||||||
| 51 | /// function type. | ||||||||||
| 52 | static QualType lookupPromiseType(Sema &S, const FunctionDecl *FD, | ||||||||||
| 53 | SourceLocation KwLoc) { | ||||||||||
| 54 | const FunctionProtoType *FnType = FD->getType()->castAs<FunctionProtoType>(); | ||||||||||
| 55 | const SourceLocation FuncLoc = FD->getLocation(); | ||||||||||
| 56 | // FIXME: Cache std::coroutine_traits once we've found it. | ||||||||||
| 57 | NamespaceDecl *StdExp = S.lookupStdExperimentalNamespace(); | ||||||||||
| 58 | if (!StdExp) { | ||||||||||
| 59 | S.Diag(KwLoc, diag::err_implied_coroutine_type_not_found) | ||||||||||
| 60 | << "std::experimental::coroutine_traits"; | ||||||||||
| 61 | return QualType(); | ||||||||||
| 62 | } | ||||||||||
| 63 | |||||||||||
| 64 | ClassTemplateDecl *CoroTraits = S.lookupCoroutineTraits(KwLoc, FuncLoc); | ||||||||||
| 65 | if (!CoroTraits) { | ||||||||||
| 66 | return QualType(); | ||||||||||
| 67 | } | ||||||||||
| 68 | |||||||||||
| 69 | // Form template argument list for coroutine_traits<R, P1, P2, ...> according | ||||||||||
| 70 | // to [dcl.fct.def.coroutine]3 | ||||||||||
| 71 | TemplateArgumentListInfo Args(KwLoc, KwLoc); | ||||||||||
| 72 | auto AddArg = [&](QualType T) { | ||||||||||
| 73 | Args.addArgument(TemplateArgumentLoc( | ||||||||||
| 74 | TemplateArgument(T), S.Context.getTrivialTypeSourceInfo(T, KwLoc))); | ||||||||||
| 75 | }; | ||||||||||
| 76 | AddArg(FnType->getReturnType()); | ||||||||||
| 77 | // If the function is a non-static member function, add the type | ||||||||||
| 78 | // of the implicit object parameter before the formal parameters. | ||||||||||
| 79 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||||||
| 80 | if (MD->isInstance()) { | ||||||||||
| 81 | // [over.match.funcs]4 | ||||||||||
| 82 | // For non-static member functions, the type of the implicit object | ||||||||||
| 83 | // parameter is | ||||||||||
| 84 | // -- "lvalue reference to cv X" for functions declared without a | ||||||||||
| 85 | // ref-qualifier or with the & ref-qualifier | ||||||||||
| 86 | // -- "rvalue reference to cv X" for functions declared with the && | ||||||||||
| 87 | // ref-qualifier | ||||||||||
| 88 | QualType T = MD->getThisType()->castAs<PointerType>()->getPointeeType(); | ||||||||||
| 89 | T = FnType->getRefQualifier() == RQ_RValue | ||||||||||
| 90 | ? S.Context.getRValueReferenceType(T) | ||||||||||
| 91 | : S.Context.getLValueReferenceType(T, /*SpelledAsLValue*/ true); | ||||||||||
| 92 | AddArg(T); | ||||||||||
| 93 | } | ||||||||||
| 94 | } | ||||||||||
| 95 | for (QualType T : FnType->getParamTypes()) | ||||||||||
| 96 | AddArg(T); | ||||||||||
| 97 | |||||||||||
| 98 | // Build the template-id. | ||||||||||
| 99 | QualType CoroTrait = | ||||||||||
| 100 | S.CheckTemplateIdType(TemplateName(CoroTraits), KwLoc, Args); | ||||||||||
| 101 | if (CoroTrait.isNull()) | ||||||||||
| 102 | return QualType(); | ||||||||||
| 103 | if (S.RequireCompleteType(KwLoc, CoroTrait, | ||||||||||
| 104 | diag::err_coroutine_type_missing_specialization)) | ||||||||||
| 105 | return QualType(); | ||||||||||
| 106 | |||||||||||
| 107 | auto *RD = CoroTrait->getAsCXXRecordDecl(); | ||||||||||
| 108 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 108, __PRETTY_FUNCTION__)); | ||||||||||
| 109 | |||||||||||
| 110 | // Look up the ::promise_type member. | ||||||||||
| 111 | LookupResult R(S, &S.PP.getIdentifierTable().get("promise_type"), KwLoc, | ||||||||||
| 112 | Sema::LookupOrdinaryName); | ||||||||||
| 113 | S.LookupQualifiedName(R, RD); | ||||||||||
| 114 | auto *Promise = R.getAsSingle<TypeDecl>(); | ||||||||||
| 115 | if (!Promise) { | ||||||||||
| 116 | S.Diag(FuncLoc, | ||||||||||
| 117 | diag::err_implied_std_coroutine_traits_promise_type_not_found) | ||||||||||
| 118 | << RD; | ||||||||||
| 119 | return QualType(); | ||||||||||
| 120 | } | ||||||||||
| 121 | // The promise type is required to be a class type. | ||||||||||
| 122 | QualType PromiseType = S.Context.getTypeDeclType(Promise); | ||||||||||
| 123 | |||||||||||
| 124 | auto buildElaboratedType = [&]() { | ||||||||||
| 125 | auto *NNS = NestedNameSpecifier::Create(S.Context, nullptr, StdExp); | ||||||||||
| 126 | NNS = NestedNameSpecifier::Create(S.Context, NNS, false, | ||||||||||
| 127 | CoroTrait.getTypePtr()); | ||||||||||
| 128 | return S.Context.getElaboratedType(ETK_None, NNS, PromiseType); | ||||||||||
| 129 | }; | ||||||||||
| 130 | |||||||||||
| 131 | if (!PromiseType->getAsCXXRecordDecl()) { | ||||||||||
| 132 | S.Diag(FuncLoc, | ||||||||||
| 133 | diag::err_implied_std_coroutine_traits_promise_type_not_class) | ||||||||||
| 134 | << buildElaboratedType(); | ||||||||||
| 135 | return QualType(); | ||||||||||
| 136 | } | ||||||||||
| 137 | if (S.RequireCompleteType(FuncLoc, buildElaboratedType(), | ||||||||||
| 138 | diag::err_coroutine_promise_type_incomplete)) | ||||||||||
| 139 | return QualType(); | ||||||||||
| 140 | |||||||||||
| 141 | return PromiseType; | ||||||||||
| 142 | } | ||||||||||
| 143 | |||||||||||
| 144 | /// Look up the std::experimental::coroutine_handle<PromiseType>. | ||||||||||
| 145 | static QualType lookupCoroutineHandleType(Sema &S, QualType PromiseType, | ||||||||||
| 146 | SourceLocation Loc) { | ||||||||||
| 147 | if (PromiseType.isNull()) | ||||||||||
| 148 | return QualType(); | ||||||||||
| 149 | |||||||||||
| 150 | NamespaceDecl *StdExp = S.lookupStdExperimentalNamespace(); | ||||||||||
| 151 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 151, __PRETTY_FUNCTION__)); | ||||||||||
| 152 | |||||||||||
| 153 | LookupResult Result(S, &S.PP.getIdentifierTable().get("coroutine_handle"), | ||||||||||
| 154 | Loc, Sema::LookupOrdinaryName); | ||||||||||
| 155 | if (!S.LookupQualifiedName(Result, StdExp)) { | ||||||||||
| 156 | S.Diag(Loc, diag::err_implied_coroutine_type_not_found) | ||||||||||
| 157 | << "std::experimental::coroutine_handle"; | ||||||||||
| 158 | return QualType(); | ||||||||||
| 159 | } | ||||||||||
| 160 | |||||||||||
| 161 | ClassTemplateDecl *CoroHandle = Result.getAsSingle<ClassTemplateDecl>(); | ||||||||||
| 162 | if (!CoroHandle) { | ||||||||||
| 163 | Result.suppressDiagnostics(); | ||||||||||
| 164 | // We found something weird. Complain about the first thing we found. | ||||||||||
| 165 | NamedDecl *Found = *Result.begin(); | ||||||||||
| 166 | S.Diag(Found->getLocation(), diag::err_malformed_std_coroutine_handle); | ||||||||||
| 167 | return QualType(); | ||||||||||
| 168 | } | ||||||||||
| 169 | |||||||||||
| 170 | // Form template argument list for coroutine_handle<Promise>. | ||||||||||
| 171 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||||||
| 172 | Args.addArgument(TemplateArgumentLoc( | ||||||||||
| 173 | TemplateArgument(PromiseType), | ||||||||||
| 174 | S.Context.getTrivialTypeSourceInfo(PromiseType, Loc))); | ||||||||||
| 175 | |||||||||||
| 176 | // Build the template-id. | ||||||||||
| 177 | QualType CoroHandleType = | ||||||||||
| 178 | S.CheckTemplateIdType(TemplateName(CoroHandle), Loc, Args); | ||||||||||
| 179 | if (CoroHandleType.isNull()) | ||||||||||
| 180 | return QualType(); | ||||||||||
| 181 | if (S.RequireCompleteType(Loc, CoroHandleType, | ||||||||||
| 182 | diag::err_coroutine_type_missing_specialization)) | ||||||||||
| 183 | return QualType(); | ||||||||||
| 184 | |||||||||||
| 185 | return CoroHandleType; | ||||||||||
| 186 | } | ||||||||||
| 187 | |||||||||||
| 188 | static bool isValidCoroutineContext(Sema &S, SourceLocation Loc, | ||||||||||
| 189 | StringRef Keyword) { | ||||||||||
| 190 | // [expr.await]p2 dictates that 'co_await' and 'co_yield' must be used within | ||||||||||
| 191 | // a function body. | ||||||||||
| 192 | // FIXME: This also covers [expr.await]p2: "An await-expression shall not | ||||||||||
| 193 | // appear in a default argument." But the diagnostic QoI here could be | ||||||||||
| 194 | // improved to inform the user that default arguments specifically are not | ||||||||||
| 195 | // allowed. | ||||||||||
| 196 | auto *FD = dyn_cast<FunctionDecl>(S.CurContext); | ||||||||||
| 197 | if (!FD
| ||||||||||
| 198 | S.Diag(Loc, isa<ObjCMethodDecl>(S.CurContext) | ||||||||||
| 199 | ? diag::err_coroutine_objc_method | ||||||||||
| 200 | : diag::err_coroutine_outside_function) << Keyword; | ||||||||||
| 201 | return false; | ||||||||||
| 202 | } | ||||||||||
| 203 | |||||||||||
| 204 | // An enumeration for mapping the diagnostic type to the correct diagnostic | ||||||||||
| 205 | // selection index. | ||||||||||
| 206 | enum InvalidFuncDiag { | ||||||||||
| 207 | DiagCtor = 0, | ||||||||||
| 208 | DiagDtor, | ||||||||||
| 209 | DiagMain, | ||||||||||
| 210 | DiagConstexpr, | ||||||||||
| 211 | DiagAutoRet, | ||||||||||
| 212 | DiagVarargs, | ||||||||||
| 213 | DiagConsteval, | ||||||||||
| 214 | }; | ||||||||||
| 215 | bool Diagnosed = false; | ||||||||||
| 216 | auto DiagInvalid = [&](InvalidFuncDiag ID) { | ||||||||||
| 217 | S.Diag(Loc, diag::err_coroutine_invalid_func_context) << ID << Keyword; | ||||||||||
| 218 | Diagnosed = true; | ||||||||||
| 219 | return false; | ||||||||||
| 220 | }; | ||||||||||
| 221 | |||||||||||
| 222 | // Diagnose when a constructor, destructor | ||||||||||
| 223 | // or the function 'main' are declared as a coroutine. | ||||||||||
| 224 | auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||||||
| 225 | // [class.ctor]p11: "A constructor shall not be a coroutine." | ||||||||||
| 226 | if (MD
| ||||||||||
| 227 | return DiagInvalid(DiagCtor); | ||||||||||
| 228 | // [class.dtor]p17: "A destructor shall not be a coroutine." | ||||||||||
| 229 | else if (MD
| ||||||||||
| 230 | return DiagInvalid(DiagDtor); | ||||||||||
| 231 | // [basic.start.main]p3: "The function main shall not be a coroutine." | ||||||||||
| 232 | else if (FD->isMain()) | ||||||||||
| 233 | return DiagInvalid(DiagMain); | ||||||||||
| 234 | |||||||||||
| 235 | // Emit a diagnostics for each of the following conditions which is not met. | ||||||||||
| 236 | // [expr.const]p2: "An expression e is a core constant expression unless the | ||||||||||
| 237 | // evaluation of e [...] would evaluate one of the following expressions: | ||||||||||
| 238 | // [...] an await-expression [...] a yield-expression." | ||||||||||
| 239 | if (FD->isConstexpr()) | ||||||||||
| 240 | DiagInvalid(FD->isConsteval() ? DiagConsteval : DiagConstexpr); | ||||||||||
| 241 | // [dcl.spec.auto]p15: "A function declared with a return type that uses a | ||||||||||
| 242 | // placeholder type shall not be a coroutine." | ||||||||||
| 243 | if (FD->getReturnType()->isUndeducedType()) | ||||||||||
| 244 | DiagInvalid(DiagAutoRet); | ||||||||||
| 245 | // [dcl.fct.def.coroutine]p1: "The parameter-declaration-clause of the | ||||||||||
| 246 | // coroutine shall not terminate with an ellipsis that is not part of a | ||||||||||
| 247 | // parameter-declaration." | ||||||||||
| 248 | if (FD->isVariadic()) | ||||||||||
| 249 | DiagInvalid(DiagVarargs); | ||||||||||
| 250 | |||||||||||
| 251 | return !Diagnosed; | ||||||||||
| 252 | } | ||||||||||
| 253 | |||||||||||
| 254 | static ExprResult buildOperatorCoawaitLookupExpr(Sema &SemaRef, Scope *S, | ||||||||||
| 255 | SourceLocation Loc) { | ||||||||||
| 256 | DeclarationName OpName = | ||||||||||
| 257 | SemaRef.Context.DeclarationNames.getCXXOperatorName(OO_Coawait); | ||||||||||
| 258 | LookupResult Operators(SemaRef, OpName, SourceLocation(), | ||||||||||
| 259 | Sema::LookupOperatorName); | ||||||||||
| 260 | SemaRef.LookupName(Operators, S); | ||||||||||
| 261 | |||||||||||
| 262 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 262, __PRETTY_FUNCTION__)); | ||||||||||
| 263 | const auto &Functions = Operators.asUnresolvedSet(); | ||||||||||
| 264 | bool IsOverloaded = | ||||||||||
| 265 | Functions.size() > 1 || | ||||||||||
| 266 | (Functions.size() == 1 && isa<FunctionTemplateDecl>(*Functions.begin())); | ||||||||||
| 267 | Expr *CoawaitOp = UnresolvedLookupExpr::Create( | ||||||||||
| 268 | SemaRef.Context, /*NamingClass*/ nullptr, NestedNameSpecifierLoc(), | ||||||||||
| 269 | DeclarationNameInfo(OpName, Loc), /*RequiresADL*/ true, IsOverloaded, | ||||||||||
| 270 | Functions.begin(), Functions.end()); | ||||||||||
| 271 | assert(CoawaitOp)((CoawaitOp) ? static_cast<void> (0) : __assert_fail ("CoawaitOp" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 271, __PRETTY_FUNCTION__)); | ||||||||||
| 272 | return CoawaitOp; | ||||||||||
| 273 | } | ||||||||||
| 274 | |||||||||||
| 275 | /// Build a call to 'operator co_await' if there is a suitable operator for | ||||||||||
| 276 | /// the given expression. | ||||||||||
| 277 | static ExprResult buildOperatorCoawaitCall(Sema &SemaRef, SourceLocation Loc, | ||||||||||
| 278 | Expr *E, | ||||||||||
| 279 | UnresolvedLookupExpr *Lookup) { | ||||||||||
| 280 | UnresolvedSet<16> Functions; | ||||||||||
| 281 | Functions.append(Lookup->decls_begin(), Lookup->decls_end()); | ||||||||||
| 282 | return SemaRef.CreateOverloadedUnaryOp(Loc, UO_Coawait, Functions, E); | ||||||||||
| 283 | } | ||||||||||
| 284 | |||||||||||
| 285 | static ExprResult buildOperatorCoawaitCall(Sema &SemaRef, Scope *S, | ||||||||||
| 286 | SourceLocation Loc, Expr *E) { | ||||||||||
| 287 | ExprResult R = buildOperatorCoawaitLookupExpr(SemaRef, S, Loc); | ||||||||||
| 288 | if (R.isInvalid()) | ||||||||||
| 289 | return ExprError(); | ||||||||||
| 290 | return buildOperatorCoawaitCall(SemaRef, Loc, E, | ||||||||||
| 291 | cast<UnresolvedLookupExpr>(R.get())); | ||||||||||
| 292 | } | ||||||||||
| 293 | |||||||||||
| 294 | static Expr *buildBuiltinCall(Sema &S, SourceLocation Loc, Builtin::ID Id, | ||||||||||
| 295 | MultiExprArg CallArgs) { | ||||||||||
| 296 | StringRef Name = S.Context.BuiltinInfo.getName(Id); | ||||||||||
| 297 | LookupResult R(S, &S.Context.Idents.get(Name), Loc, Sema::LookupOrdinaryName); | ||||||||||
| 298 | S.LookupName(R, S.TUScope, /*AllowBuiltinCreation=*/true); | ||||||||||
| 299 | |||||||||||
| 300 | auto *BuiltInDecl = R.getAsSingle<FunctionDecl>(); | ||||||||||
| 301 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 301, __PRETTY_FUNCTION__)); | ||||||||||
| 302 | |||||||||||
| 303 | ExprResult DeclRef = | ||||||||||
| 304 | S.BuildDeclRefExpr(BuiltInDecl, BuiltInDecl->getType(), VK_LValue, Loc); | ||||||||||
| 305 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 305, __PRETTY_FUNCTION__)); | ||||||||||
| 306 | |||||||||||
| 307 | ExprResult Call = | ||||||||||
| 308 | S.BuildCallExpr(/*Scope=*/nullptr, DeclRef.get(), Loc, CallArgs, Loc); | ||||||||||
| 309 | |||||||||||
| 310 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 310, __PRETTY_FUNCTION__)); | ||||||||||
| 311 | return Call.get(); | ||||||||||
| 312 | } | ||||||||||
| 313 | |||||||||||
| 314 | static ExprResult buildCoroutineHandle(Sema &S, QualType PromiseType, | ||||||||||
| 315 | SourceLocation Loc) { | ||||||||||
| 316 | QualType CoroHandleType = lookupCoroutineHandleType(S, PromiseType, Loc); | ||||||||||
| 317 | if (CoroHandleType.isNull()) | ||||||||||
| 318 | return ExprError(); | ||||||||||
| 319 | |||||||||||
| 320 | DeclContext *LookupCtx = S.computeDeclContext(CoroHandleType); | ||||||||||
| 321 | LookupResult Found(S, &S.PP.getIdentifierTable().get("from_address"), Loc, | ||||||||||
| 322 | Sema::LookupOrdinaryName); | ||||||||||
| 323 | if (!S.LookupQualifiedName(Found, LookupCtx)) { | ||||||||||
| 324 | S.Diag(Loc, diag::err_coroutine_handle_missing_member) | ||||||||||
| 325 | << "from_address"; | ||||||||||
| 326 | return ExprError(); | ||||||||||
| 327 | } | ||||||||||
| 328 | |||||||||||
| 329 | Expr *FramePtr = | ||||||||||
| 330 | buildBuiltinCall(S, Loc, Builtin::BI__builtin_coro_frame, {}); | ||||||||||
| 331 | |||||||||||
| 332 | CXXScopeSpec SS; | ||||||||||
| 333 | ExprResult FromAddr = | ||||||||||
| 334 | S.BuildDeclarationNameExpr(SS, Found, /*NeedsADL=*/false); | ||||||||||
| 335 | if (FromAddr.isInvalid()) | ||||||||||
| 336 | return ExprError(); | ||||||||||
| 337 | |||||||||||
| 338 | return S.BuildCallExpr(nullptr, FromAddr.get(), Loc, FramePtr, Loc); | ||||||||||
| 339 | } | ||||||||||
| 340 | |||||||||||
| 341 | struct ReadySuspendResumeResult { | ||||||||||
| 342 | enum AwaitCallType { ACT_Ready, ACT_Suspend, ACT_Resume }; | ||||||||||
| 343 | Expr *Results[3]; | ||||||||||
| 344 | OpaqueValueExpr *OpaqueValue; | ||||||||||
| 345 | bool IsInvalid; | ||||||||||
| 346 | }; | ||||||||||
| 347 | |||||||||||
| 348 | static ExprResult buildMemberCall(Sema &S, Expr *Base, SourceLocation Loc, | ||||||||||
| 349 | StringRef Name, MultiExprArg Args) { | ||||||||||
| 350 | DeclarationNameInfo NameInfo(&S.PP.getIdentifierTable().get(Name), Loc); | ||||||||||
| 351 | |||||||||||
| 352 | // FIXME: Fix BuildMemberReferenceExpr to take a const CXXScopeSpec&. | ||||||||||
| 353 | CXXScopeSpec SS; | ||||||||||
| 354 | ExprResult Result = S.BuildMemberReferenceExpr( | ||||||||||
| 355 | Base, Base->getType(), Loc, /*IsPtr=*/false, SS, | ||||||||||
| 356 | SourceLocation(), nullptr, NameInfo, /*TemplateArgs=*/nullptr, | ||||||||||
| 357 | /*Scope=*/nullptr); | ||||||||||
| 358 | if (Result.isInvalid()) | ||||||||||
| 359 | return ExprError(); | ||||||||||
| 360 | |||||||||||
| 361 | // We meant exactly what we asked for. No need for typo correction. | ||||||||||
| 362 | if (auto *TE = dyn_cast<TypoExpr>(Result.get())) { | ||||||||||
| 363 | S.clearDelayedTypo(TE); | ||||||||||
| 364 | S.Diag(Loc, diag::err_no_member) | ||||||||||
| 365 | << NameInfo.getName() << Base->getType()->getAsCXXRecordDecl() | ||||||||||
| 366 | << Base->getSourceRange(); | ||||||||||
| 367 | return ExprError(); | ||||||||||
| 368 | } | ||||||||||
| 369 | |||||||||||
| 370 | return S.BuildCallExpr(nullptr, Result.get(), Loc, Args, Loc, nullptr); | ||||||||||
| 371 | } | ||||||||||
| 372 | |||||||||||
| 373 | // See if return type is coroutine-handle and if so, invoke builtin coro-resume | ||||||||||
| 374 | // on its address. This is to enable experimental support for coroutine-handle | ||||||||||
| 375 | // returning await_suspend that results in a guaranteed tail call to the target | ||||||||||
| 376 | // coroutine. | ||||||||||
| 377 | static Expr *maybeTailCall(Sema &S, QualType RetType, Expr *E, | ||||||||||
| 378 | SourceLocation Loc) { | ||||||||||
| 379 | if (RetType->isReferenceType()) | ||||||||||
| 380 | return nullptr; | ||||||||||
| 381 | Type const *T = RetType.getTypePtr(); | ||||||||||
| 382 | if (!T->isClassType() && !T->isStructureType()) | ||||||||||
| 383 | return nullptr; | ||||||||||
| 384 | |||||||||||
| 385 | // FIXME: Add convertability check to coroutine_handle<>. Possibly via | ||||||||||
| 386 | // EvaluateBinaryTypeTrait(BTT_IsConvertible, ...) which is at the moment | ||||||||||
| 387 | // a private function in SemaExprCXX.cpp | ||||||||||
| 388 | |||||||||||
| 389 | ExprResult AddressExpr = buildMemberCall(S, E, Loc, "address", None); | ||||||||||
| 390 | if (AddressExpr.isInvalid()) | ||||||||||
| 391 | return nullptr; | ||||||||||
| 392 | |||||||||||
| 393 | Expr *JustAddress = AddressExpr.get(); | ||||||||||
| 394 | |||||||||||
| 395 | // Check that the type of AddressExpr is void* | ||||||||||
| 396 | if (!JustAddress->getType().getTypePtr()->isVoidPointerType()) | ||||||||||
| 397 | S.Diag(cast<CallExpr>(JustAddress)->getCalleeDecl()->getLocation(), | ||||||||||
| 398 | diag::warn_coroutine_handle_address_invalid_return_type) | ||||||||||
| 399 | << JustAddress->getType(); | ||||||||||
| 400 | |||||||||||
| 401 | // Clean up temporary objects so that they don't live across suspension points | ||||||||||
| 402 | // unnecessarily. We choose to clean up before the call to | ||||||||||
| 403 | // __builtin_coro_resume so that the cleanup code are not inserted in-between | ||||||||||
| 404 | // the resume call and return instruction, which would interfere with the | ||||||||||
| 405 | // musttail call contract. | ||||||||||
| 406 | JustAddress = S.MaybeCreateExprWithCleanups(JustAddress); | ||||||||||
| 407 | return buildBuiltinCall(S, Loc, Builtin::BI__builtin_coro_resume, | ||||||||||
| 408 | JustAddress); | ||||||||||
| 409 | } | ||||||||||
| 410 | |||||||||||
| 411 | /// Build calls to await_ready, await_suspend, and await_resume for a co_await | ||||||||||
| 412 | /// expression. | ||||||||||
| 413 | /// The generated AST tries to clean up temporary objects as early as | ||||||||||
| 414 | /// possible so that they don't live across suspension points if possible. | ||||||||||
| 415 | /// Having temporary objects living across suspension points unnecessarily can | ||||||||||
| 416 | /// lead to large frame size, and also lead to memory corruptions if the | ||||||||||
| 417 | /// coroutine frame is destroyed after coming back from suspension. This is done | ||||||||||
| 418 | /// by wrapping both the await_ready call and the await_suspend call with | ||||||||||
| 419 | /// ExprWithCleanups. In the end of this function, we also need to explicitly | ||||||||||
| 420 | /// set cleanup state so that the CoawaitExpr is also wrapped with an | ||||||||||
| 421 | /// ExprWithCleanups to clean up the awaiter associated with the co_await | ||||||||||
| 422 | /// expression. | ||||||||||
| 423 | static ReadySuspendResumeResult buildCoawaitCalls(Sema &S, VarDecl *CoroPromise, | ||||||||||
| 424 | SourceLocation Loc, Expr *E) { | ||||||||||
| 425 | OpaqueValueExpr *Operand = new (S.Context) | ||||||||||
| 426 | OpaqueValueExpr(Loc, E->getType(), VK_LValue, E->getObjectKind(), E); | ||||||||||
| 427 | |||||||||||
| 428 | // Assume valid until we see otherwise. | ||||||||||
| 429 | // Further operations are responsible for setting IsInalid to true. | ||||||||||
| 430 | ReadySuspendResumeResult Calls = {{}, Operand, /*IsInvalid=*/false}; | ||||||||||
| 431 | |||||||||||
| 432 | using ACT = ReadySuspendResumeResult::AwaitCallType; | ||||||||||
| 433 | |||||||||||
| 434 | auto BuildSubExpr = [&](ACT CallType, StringRef Func, | ||||||||||
| 435 | MultiExprArg Arg) -> Expr * { | ||||||||||
| 436 | ExprResult Result = buildMemberCall(S, Operand, Loc, Func, Arg); | ||||||||||
| 437 | if (Result.isInvalid()) { | ||||||||||
| 438 | Calls.IsInvalid = true; | ||||||||||
| 439 | return nullptr; | ||||||||||
| 440 | } | ||||||||||
| 441 | Calls.Results[CallType] = Result.get(); | ||||||||||
| 442 | return Result.get(); | ||||||||||
| 443 | }; | ||||||||||
| 444 | |||||||||||
| 445 | CallExpr *AwaitReady = | ||||||||||
| 446 | cast_or_null<CallExpr>(BuildSubExpr(ACT::ACT_Ready, "await_ready", None)); | ||||||||||
| 447 | if (!AwaitReady
| ||||||||||
| 448 | return Calls; | ||||||||||
| 449 | if (!AwaitReady->getType()->isDependentType()) { | ||||||||||
| 450 | // [expr.await]p3 [...] | ||||||||||
| 451 | // — await-ready is the expression e.await_ready(), contextually converted | ||||||||||
| 452 | // to bool. | ||||||||||
| 453 | ExprResult Conv = S.PerformContextuallyConvertToBool(AwaitReady); | ||||||||||
| 454 | if (Conv.isInvalid()) { | ||||||||||
| 455 | S.Diag(AwaitReady->getDirectCallee()->getBeginLoc(), | ||||||||||
| 456 | diag::note_await_ready_no_bool_conversion); | ||||||||||
| 457 | S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required) | ||||||||||
| 458 | << AwaitReady->getDirectCallee() << E->getSourceRange(); | ||||||||||
| 459 | Calls.IsInvalid = true; | ||||||||||
| 460 | } else | ||||||||||
| 461 | Calls.Results[ACT::ACT_Ready] = S.MaybeCreateExprWithCleanups(Conv.get()); | ||||||||||
| 462 | } | ||||||||||
| 463 | |||||||||||
| 464 | ExprResult CoroHandleRes = | ||||||||||
| 465 | buildCoroutineHandle(S, CoroPromise->getType(), Loc); | ||||||||||
| 466 | if (CoroHandleRes.isInvalid()) { | ||||||||||
| 467 | Calls.IsInvalid = true; | ||||||||||
| 468 | return Calls; | ||||||||||
| 469 | } | ||||||||||
| 470 | Expr *CoroHandle = CoroHandleRes.get(); | ||||||||||
| 471 | CallExpr *AwaitSuspend = cast_or_null<CallExpr>( | ||||||||||
| 472 | BuildSubExpr(ACT::ACT_Suspend, "await_suspend", CoroHandle)); | ||||||||||
| 473 | if (!AwaitSuspend) | ||||||||||
| 474 | return Calls; | ||||||||||
| 475 | if (!AwaitSuspend->getType()->isDependentType()) { | ||||||||||
| 476 | // [expr.await]p3 [...] | ||||||||||
| 477 | // - await-suspend is the expression e.await_suspend(h), which shall be | ||||||||||
| 478 | // a prvalue of type void, bool, or std::coroutine_handle<Z> for some | ||||||||||
| 479 | // type Z. | ||||||||||
| 480 | QualType RetType = AwaitSuspend->getCallReturnType(S.Context); | ||||||||||
| 481 | |||||||||||
| 482 | // Experimental support for coroutine_handle returning await_suspend. | ||||||||||
| 483 | if (Expr *TailCallSuspend = | ||||||||||
| 484 | maybeTailCall(S, RetType, AwaitSuspend, Loc)) | ||||||||||
| 485 | // Note that we don't wrap the expression with ExprWithCleanups here | ||||||||||
| 486 | // because that might interfere with tailcall contract (e.g. inserting | ||||||||||
| 487 | // clean up instructions in-between tailcall and return). Instead | ||||||||||
| 488 | // ExprWithCleanups is wrapped within maybeTailCall() prior to the resume | ||||||||||
| 489 | // call. | ||||||||||
| 490 | Calls.Results[ACT::ACT_Suspend] = TailCallSuspend; | ||||||||||
| 491 | else { | ||||||||||
| 492 | // non-class prvalues always have cv-unqualified types | ||||||||||
| 493 | if (RetType->isReferenceType() || | ||||||||||
| 494 | (!RetType->isBooleanType() && !RetType->isVoidType())) { | ||||||||||
| 495 | S.Diag(AwaitSuspend->getCalleeDecl()->getLocation(), | ||||||||||
| 496 | diag::err_await_suspend_invalid_return_type) | ||||||||||
| 497 | << RetType; | ||||||||||
| 498 | S.Diag(Loc, diag::note_coroutine_promise_call_implicitly_required) | ||||||||||
| 499 | << AwaitSuspend->getDirectCallee(); | ||||||||||
| 500 | Calls.IsInvalid = true; | ||||||||||
| 501 | } else | ||||||||||
| 502 | Calls.Results[ACT::ACT_Suspend] = | ||||||||||
| 503 | S.MaybeCreateExprWithCleanups(AwaitSuspend); | ||||||||||
| 504 | } | ||||||||||
| 505 | } | ||||||||||
| 506 | |||||||||||
| 507 | BuildSubExpr(ACT::ACT_Resume, "await_resume", None); | ||||||||||
| 508 | |||||||||||
| 509 | // Make sure the awaiter object gets a chance to be cleaned up. | ||||||||||
| 510 | S.Cleanup.setExprNeedsCleanups(true); | ||||||||||
| 511 | |||||||||||
| 512 | return Calls; | ||||||||||
| 513 | } | ||||||||||
| 514 | |||||||||||
| 515 | static ExprResult buildPromiseCall(Sema &S, VarDecl *Promise, | ||||||||||
| 516 | SourceLocation Loc, StringRef Name, | ||||||||||
| 517 | MultiExprArg Args) { | ||||||||||
| 518 | |||||||||||
| 519 | // Form a reference to the promise. | ||||||||||
| 520 | ExprResult PromiseRef = S.BuildDeclRefExpr( | ||||||||||
| 521 | Promise, Promise->getType().getNonReferenceType(), VK_LValue, Loc); | ||||||||||
| 522 | if (PromiseRef.isInvalid()) | ||||||||||
| 523 | return ExprError(); | ||||||||||
| 524 | |||||||||||
| 525 | return buildMemberCall(S, PromiseRef.get(), Loc, Name, Args); | ||||||||||
| 526 | } | ||||||||||
| 527 | |||||||||||
| 528 | VarDecl *Sema::buildCoroutinePromise(SourceLocation Loc) { | ||||||||||
| 529 | 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-13~++20210413100635+64c24f493e5f/clang/lib/Sema/SemaCoroutine.cpp" , 529, __PRETTY_FUNCTION__)); | ||||||||||
| 530 | auto *FD = cast<FunctionDecl>(CurContext); | ||||||||||
| 531 | bool IsThisDependentType = [&] { | ||||||||||
| 532 | if (auto *MD = dyn_cast_or_null<CXXMethodDecl>(FD)) | ||||||||||
| 533 | return MD->isInstance() && MD->getThisType()->isDependentType(); | ||||||||||
| 534 | else | ||||||||||
| 535 | return false; | ||||||||||
| 536 | }(); | ||||||||||
| 537 | |||||||||||
| 538 | QualType T = FD->getType()->isDependentType() || IsThisDependentType
|
45.1 | 'IsThisDependentType' is false |
57.1 | 'MD' is null |
57.1 | 'MD' is null |
57.1 | 'MD' is null |
57.1 | 'MD' is null |
57.1 | 'MD' is null |
65.1 | Field 'CoroutinePromise' is non-null |
65.1 | Field 'CoroutinePromise' is non-null |
65.1 | Field 'CoroutinePromise' is non-null |
65.1 | Field 'CoroutinePromise' is non-null |
65.1 | Field 'CoroutinePromise' is non-null |
1 | Taking false branch |
68.1 | 'Coroutine' is non-null |
68.1 | 'Coroutine' is non-null |
68.1 | 'Coroutine' is non-null |
68.1 | 'Coroutine' is non-null |
68.1 | 'Coroutine' is non-null |
85.1 | Field 'IsInvalid' is false |
85.1 | Field 'IsInvalid' is false |
85.1 | Field 'IsInvalid' is false |
85.1 | Field 'IsInvalid' is false |
85.1 | Field 'IsInvalid' is false |
| 1 | //===--- Sema.h - Semantic Analysis & AST Building --------------*- 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 | // This file defines the Sema class, which performs semantic analysis and |
| 10 | // builds ASTs. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_CLANG_SEMA_SEMA_H |
| 15 | #define LLVM_CLANG_SEMA_SEMA_H |
| 16 | |
| 17 | #include "clang/AST/ASTConcept.h" |
| 18 | #include "clang/AST/ASTFwd.h" |
| 19 | #include "clang/AST/Attr.h" |
| 20 | #include "clang/AST/Availability.h" |
| 21 | #include "clang/AST/ComparisonCategories.h" |
| 22 | #include "clang/AST/DeclTemplate.h" |
| 23 | #include "clang/AST/DeclarationName.h" |
| 24 | #include "clang/AST/Expr.h" |
| 25 | #include "clang/AST/ExprCXX.h" |
| 26 | #include "clang/AST/ExprConcepts.h" |
| 27 | #include "clang/AST/ExprObjC.h" |
| 28 | #include "clang/AST/ExprOpenMP.h" |
| 29 | #include "clang/AST/ExternalASTSource.h" |
| 30 | #include "clang/AST/LocInfoType.h" |
| 31 | #include "clang/AST/MangleNumberingContext.h" |
| 32 | #include "clang/AST/NSAPI.h" |
| 33 | #include "clang/AST/PrettyPrinter.h" |
| 34 | #include "clang/AST/StmtCXX.h" |
| 35 | #include "clang/AST/TypeLoc.h" |
| 36 | #include "clang/AST/TypeOrdering.h" |
| 37 | #include "clang/Basic/BitmaskEnum.h" |
| 38 | #include "clang/Basic/ExpressionTraits.h" |
| 39 | #include "clang/Basic/Module.h" |
| 40 | #include "clang/Basic/OpenCLOptions.h" |
| 41 | #include "clang/Basic/OpenMPKinds.h" |
| 42 | #include "clang/Basic/PragmaKinds.h" |
| 43 | #include "clang/Basic/Specifiers.h" |
| 44 | #include "clang/Basic/TemplateKinds.h" |
| 45 | #include "clang/Basic/TypeTraits.h" |
| 46 | #include "clang/Sema/AnalysisBasedWarnings.h" |
| 47 | #include "clang/Sema/CleanupInfo.h" |
| 48 | #include "clang/Sema/DeclSpec.h" |
| 49 | #include "clang/Sema/ExternalSemaSource.h" |
| 50 | #include "clang/Sema/IdentifierResolver.h" |
| 51 | #include "clang/Sema/ObjCMethodList.h" |
| 52 | #include "clang/Sema/Ownership.h" |
| 53 | #include "clang/Sema/Scope.h" |
| 54 | #include "clang/Sema/SemaConcept.h" |
| 55 | #include "clang/Sema/TypoCorrection.h" |
| 56 | #include "clang/Sema/Weak.h" |
| 57 | #include "llvm/ADT/ArrayRef.h" |
| 58 | #include "llvm/ADT/Optional.h" |
| 59 | #include "llvm/ADT/SetVector.h" |
| 60 | #include "llvm/ADT/SmallBitVector.h" |
| 61 | #include "llvm/ADT/SmallPtrSet.h" |
| 62 | #include "llvm/ADT/SmallSet.h" |
| 63 | #include "llvm/ADT/SmallVector.h" |
| 64 | #include "llvm/ADT/TinyPtrVector.h" |
| 65 | #include "llvm/Frontend/OpenMP/OMPConstants.h" |
| 66 | #include <deque> |
| 67 | #include <memory> |
| 68 | #include <string> |
| 69 | #include <tuple> |
| 70 | #include <vector> |
| 71 | |
| 72 | namespace llvm { |
| 73 | class APSInt; |
| 74 | template <typename ValueT> struct DenseMapInfo; |
| 75 | template <typename ValueT, typename ValueInfoT> class DenseSet; |
| 76 | class SmallBitVector; |
| 77 | struct InlineAsmIdentifierInfo; |
| 78 | } |
| 79 | |
| 80 | namespace clang { |
| 81 | class ADLResult; |
| 82 | class ASTConsumer; |
| 83 | class ASTContext; |
| 84 | class ASTMutationListener; |
| 85 | class ASTReader; |
| 86 | class ASTWriter; |
| 87 | class ArrayType; |
| 88 | class ParsedAttr; |
| 89 | class BindingDecl; |
| 90 | class BlockDecl; |
| 91 | class CapturedDecl; |
| 92 | class CXXBasePath; |
| 93 | class CXXBasePaths; |
| 94 | class CXXBindTemporaryExpr; |
| 95 | typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; |
| 96 | class CXXConstructorDecl; |
| 97 | class CXXConversionDecl; |
| 98 | class CXXDeleteExpr; |
| 99 | class CXXDestructorDecl; |
| 100 | class CXXFieldCollector; |
| 101 | class CXXMemberCallExpr; |
| 102 | class CXXMethodDecl; |
| 103 | class CXXScopeSpec; |
| 104 | class CXXTemporary; |
| 105 | class CXXTryStmt; |
| 106 | class CallExpr; |
| 107 | class ClassTemplateDecl; |
| 108 | class ClassTemplatePartialSpecializationDecl; |
| 109 | class ClassTemplateSpecializationDecl; |
| 110 | class VarTemplatePartialSpecializationDecl; |
| 111 | class CodeCompleteConsumer; |
| 112 | class CodeCompletionAllocator; |
| 113 | class CodeCompletionTUInfo; |
| 114 | class CodeCompletionResult; |
| 115 | class CoroutineBodyStmt; |
| 116 | class Decl; |
| 117 | class DeclAccessPair; |
| 118 | class DeclContext; |
| 119 | class DeclRefExpr; |
| 120 | class DeclaratorDecl; |
| 121 | class DeducedTemplateArgument; |
| 122 | class DependentDiagnostic; |
| 123 | class DesignatedInitExpr; |
| 124 | class Designation; |
| 125 | class EnableIfAttr; |
| 126 | class EnumConstantDecl; |
| 127 | class Expr; |
| 128 | class ExtVectorType; |
| 129 | class FormatAttr; |
| 130 | class FriendDecl; |
| 131 | class FunctionDecl; |
| 132 | class FunctionProtoType; |
| 133 | class FunctionTemplateDecl; |
| 134 | class ImplicitConversionSequence; |
| 135 | typedef MutableArrayRef<ImplicitConversionSequence> ConversionSequenceList; |
| 136 | class InitListExpr; |
| 137 | class InitializationKind; |
| 138 | class InitializationSequence; |
| 139 | class InitializedEntity; |
| 140 | class IntegerLiteral; |
| 141 | class LabelStmt; |
| 142 | class LambdaExpr; |
| 143 | class LangOptions; |
| 144 | class LocalInstantiationScope; |
| 145 | class LookupResult; |
| 146 | class MacroInfo; |
| 147 | typedef ArrayRef<std::pair<IdentifierInfo *, SourceLocation>> ModuleIdPath; |
| 148 | class ModuleLoader; |
| 149 | class MultiLevelTemplateArgumentList; |
| 150 | class NamedDecl; |
| 151 | class ObjCCategoryDecl; |
| 152 | class ObjCCategoryImplDecl; |
| 153 | class ObjCCompatibleAliasDecl; |
| 154 | class ObjCContainerDecl; |
| 155 | class ObjCImplDecl; |
| 156 | class ObjCImplementationDecl; |
| 157 | class ObjCInterfaceDecl; |
| 158 | class ObjCIvarDecl; |
| 159 | template <class T> class ObjCList; |
| 160 | class ObjCMessageExpr; |
| 161 | class ObjCMethodDecl; |
| 162 | class ObjCPropertyDecl; |
| 163 | class ObjCProtocolDecl; |
| 164 | class OMPThreadPrivateDecl; |
| 165 | class OMPRequiresDecl; |
| 166 | class OMPDeclareReductionDecl; |
| 167 | class OMPDeclareSimdDecl; |
| 168 | class OMPClause; |
| 169 | struct OMPVarListLocTy; |
| 170 | struct OverloadCandidate; |
| 171 | enum class OverloadCandidateParamOrder : char; |
| 172 | enum OverloadCandidateRewriteKind : unsigned; |
| 173 | class OverloadCandidateSet; |
| 174 | class OverloadExpr; |
| 175 | class ParenListExpr; |
| 176 | class ParmVarDecl; |
| 177 | class Preprocessor; |
| 178 | class PseudoDestructorTypeStorage; |
| 179 | class PseudoObjectExpr; |
| 180 | class QualType; |
| 181 | class StandardConversionSequence; |
| 182 | class Stmt; |
| 183 | class StringLiteral; |
| 184 | class SwitchStmt; |
| 185 | class TemplateArgument; |
| 186 | class TemplateArgumentList; |
| 187 | class TemplateArgumentLoc; |
| 188 | class TemplateDecl; |
| 189 | class TemplateInstantiationCallback; |
| 190 | class TemplateParameterList; |
| 191 | class TemplatePartialOrderingContext; |
| 192 | class TemplateTemplateParmDecl; |
| 193 | class Token; |
| 194 | class TypeAliasDecl; |
| 195 | class TypedefDecl; |
| 196 | class TypedefNameDecl; |
| 197 | class TypeLoc; |
| 198 | class TypoCorrectionConsumer; |
| 199 | class UnqualifiedId; |
| 200 | class UnresolvedLookupExpr; |
| 201 | class UnresolvedMemberExpr; |
| 202 | class UnresolvedSetImpl; |
| 203 | class UnresolvedSetIterator; |
| 204 | class UsingDecl; |
| 205 | class UsingShadowDecl; |
| 206 | class ValueDecl; |
| 207 | class VarDecl; |
| 208 | class VarTemplateSpecializationDecl; |
| 209 | class VisibilityAttr; |
| 210 | class VisibleDeclConsumer; |
| 211 | class IndirectFieldDecl; |
| 212 | struct DeductionFailureInfo; |
| 213 | class TemplateSpecCandidateSet; |
| 214 | |
| 215 | namespace sema { |
| 216 | class AccessedEntity; |
| 217 | class BlockScopeInfo; |
| 218 | class Capture; |
| 219 | class CapturedRegionScopeInfo; |
| 220 | class CapturingScopeInfo; |
| 221 | class CompoundScopeInfo; |
| 222 | class DelayedDiagnostic; |
| 223 | class DelayedDiagnosticPool; |
| 224 | class FunctionScopeInfo; |
| 225 | class LambdaScopeInfo; |
| 226 | class PossiblyUnreachableDiag; |
| 227 | class SemaPPCallbacks; |
| 228 | class TemplateDeductionInfo; |
| 229 | } |
| 230 | |
| 231 | namespace threadSafety { |
| 232 | class BeforeSet; |
| 233 | void threadSafetyCleanup(BeforeSet* Cache); |
| 234 | } |
| 235 | |
| 236 | // FIXME: No way to easily map from TemplateTypeParmTypes to |
| 237 | // TemplateTypeParmDecls, so we have this horrible PointerUnion. |
| 238 | typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, |
| 239 | SourceLocation> UnexpandedParameterPack; |
| 240 | |
| 241 | /// Describes whether we've seen any nullability information for the given |
| 242 | /// file. |
| 243 | struct FileNullability { |
| 244 | /// The first pointer declarator (of any pointer kind) in the file that does |
| 245 | /// not have a corresponding nullability annotation. |
| 246 | SourceLocation PointerLoc; |
| 247 | |
| 248 | /// The end location for the first pointer declarator in the file. Used for |
| 249 | /// placing fix-its. |
| 250 | SourceLocation PointerEndLoc; |
| 251 | |
| 252 | /// Which kind of pointer declarator we saw. |
| 253 | uint8_t PointerKind; |
| 254 | |
| 255 | /// Whether we saw any type nullability annotations in the given file. |
| 256 | bool SawTypeNullability = false; |
| 257 | }; |
| 258 | |
| 259 | /// A mapping from file IDs to a record of whether we've seen nullability |
| 260 | /// information in that file. |
| 261 | class FileNullabilityMap { |
| 262 | /// A mapping from file IDs to the nullability information for each file ID. |
| 263 | llvm::DenseMap<FileID, FileNullability> Map; |
| 264 | |
| 265 | /// A single-element cache based on the file ID. |
| 266 | struct { |
| 267 | FileID File; |
| 268 | FileNullability Nullability; |
| 269 | } Cache; |
| 270 | |
| 271 | public: |
| 272 | FileNullability &operator[](FileID file) { |
| 273 | // Check the single-element cache. |
| 274 | if (file == Cache.File) |
| 275 | return Cache.Nullability; |
| 276 | |
| 277 | // It's not in the single-element cache; flush the cache if we have one. |
| 278 | if (!Cache.File.isInvalid()) { |
| 279 | Map[Cache.File] = Cache.Nullability; |
| 280 | } |
| 281 | |
| 282 | // Pull this entry into the cache. |
| 283 | Cache.File = file; |
| 284 | Cache.Nullability = Map[file]; |
| 285 | return Cache.Nullability; |
| 286 | } |
| 287 | }; |
| 288 | |
| 289 | /// Tracks expected type during expression parsing, for use in code completion. |
| 290 | /// The type is tied to a particular token, all functions that update or consume |
| 291 | /// the type take a start location of the token they are looking at as a |
| 292 | /// parameter. This avoids updating the type on hot paths in the parser. |
| 293 | class PreferredTypeBuilder { |
| 294 | public: |
| 295 | PreferredTypeBuilder(bool Enabled) : Enabled(Enabled) {} |
| 296 | |
| 297 | void enterCondition(Sema &S, SourceLocation Tok); |
| 298 | void enterReturn(Sema &S, SourceLocation Tok); |
| 299 | void enterVariableInit(SourceLocation Tok, Decl *D); |
| 300 | /// Handles e.g. BaseType{ .D = Tok... |
| 301 | void enterDesignatedInitializer(SourceLocation Tok, QualType BaseType, |
| 302 | const Designation &D); |
| 303 | /// Computing a type for the function argument may require running |
| 304 | /// overloading, so we postpone its computation until it is actually needed. |
| 305 | /// |
| 306 | /// Clients should be very careful when using this funciton, as it stores a |
| 307 | /// function_ref, clients should make sure all calls to get() with the same |
| 308 | /// location happen while function_ref is alive. |
| 309 | /// |
| 310 | /// The callback should also emit signature help as a side-effect, but only |
| 311 | /// if the completion point has been reached. |
| 312 | void enterFunctionArgument(SourceLocation Tok, |
| 313 | llvm::function_ref<QualType()> ComputeType); |
| 314 | |
| 315 | void enterParenExpr(SourceLocation Tok, SourceLocation LParLoc); |
| 316 | void enterUnary(Sema &S, SourceLocation Tok, tok::TokenKind OpKind, |
| 317 | SourceLocation OpLoc); |
| 318 | void enterBinary(Sema &S, SourceLocation Tok, Expr *LHS, tok::TokenKind Op); |
| 319 | void enterMemAccess(Sema &S, SourceLocation Tok, Expr *Base); |
| 320 | void enterSubscript(Sema &S, SourceLocation Tok, Expr *LHS); |
| 321 | /// Handles all type casts, including C-style cast, C++ casts, etc. |
| 322 | void enterTypeCast(SourceLocation Tok, QualType CastType); |
| 323 | |
| 324 | /// Get the expected type associated with this location, if any. |
| 325 | /// |
| 326 | /// If the location is a function argument, determining the expected type |
| 327 | /// involves considering all function overloads and the arguments so far. |
| 328 | /// In this case, signature help for these function overloads will be reported |
| 329 | /// as a side-effect (only if the completion point has been reached). |
| 330 | QualType get(SourceLocation Tok) const { |
| 331 | if (!Enabled || Tok != ExpectedLoc) |
| 332 | return QualType(); |
| 333 | if (!Type.isNull()) |
| 334 | return Type; |
| 335 | if (ComputeType) |
| 336 | return ComputeType(); |
| 337 | return QualType(); |
| 338 | } |
| 339 | |
| 340 | private: |
| 341 | bool Enabled; |
| 342 | /// Start position of a token for which we store expected type. |
| 343 | SourceLocation ExpectedLoc; |
| 344 | /// Expected type for a token starting at ExpectedLoc. |
| 345 | QualType Type; |
| 346 | /// A function to compute expected type at ExpectedLoc. It is only considered |
| 347 | /// if Type is null. |
| 348 | llvm::function_ref<QualType()> ComputeType; |
| 349 | }; |
| 350 | |
| 351 | /// Sema - This implements semantic analysis and AST building for C. |
| 352 | class Sema final { |
| 353 | Sema(const Sema &) = delete; |
| 354 | void operator=(const Sema &) = delete; |
| 355 | |
| 356 | /// A key method to reduce duplicate debug info from Sema. |
| 357 | virtual void anchor(); |
| 358 | |
| 359 | ///Source of additional semantic information. |
| 360 | ExternalSemaSource *ExternalSource; |
| 361 | |
| 362 | ///Whether Sema has generated a multiplexer and has to delete it. |
| 363 | bool isMultiplexExternalSource; |
| 364 | |
| 365 | static bool mightHaveNonExternalLinkage(const DeclaratorDecl *FD); |
| 366 | |
| 367 | bool isVisibleSlow(const NamedDecl *D); |
| 368 | |
| 369 | /// Determine whether two declarations should be linked together, given that |
| 370 | /// the old declaration might not be visible and the new declaration might |
| 371 | /// not have external linkage. |
| 372 | bool shouldLinkPossiblyHiddenDecl(const NamedDecl *Old, |
| 373 | const NamedDecl *New) { |
| 374 | if (isVisible(Old)) |
| 375 | return true; |
| 376 | // See comment in below overload for why it's safe to compute the linkage |
| 377 | // of the new declaration here. |
| 378 | if (New->isExternallyDeclarable()) { |
| 379 | assert(Old->isExternallyDeclarable() &&((Old->isExternallyDeclarable() && "should not have found a non-externally-declarable previous decl" ) ? static_cast<void> (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 380, __PRETTY_FUNCTION__)) |
| 380 | "should not have found a non-externally-declarable previous decl")((Old->isExternallyDeclarable() && "should not have found a non-externally-declarable previous decl" ) ? static_cast<void> (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 380, __PRETTY_FUNCTION__)); |
| 381 | return true; |
| 382 | } |
| 383 | return false; |
| 384 | } |
| 385 | bool shouldLinkPossiblyHiddenDecl(LookupResult &Old, const NamedDecl *New); |
| 386 | |
| 387 | void setupImplicitSpecialMemberType(CXXMethodDecl *SpecialMem, |
| 388 | QualType ResultTy, |
| 389 | ArrayRef<QualType> Args); |
| 390 | |
| 391 | public: |
| 392 | /// The maximum alignment, same as in llvm::Value. We duplicate them here |
| 393 | /// because that allows us not to duplicate the constants in clang code, |
| 394 | /// which we must to since we can't directly use the llvm constants. |
| 395 | /// The value is verified against llvm here: lib/CodeGen/CGDecl.cpp |
| 396 | /// |
| 397 | /// This is the greatest alignment value supported by load, store, and alloca |
| 398 | /// instructions, and global values. |
| 399 | static const unsigned MaxAlignmentExponent = 29; |
| 400 | static const unsigned MaximumAlignment = 1u << MaxAlignmentExponent; |
| 401 | |
| 402 | typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; |
| 403 | typedef OpaquePtr<TemplateName> TemplateTy; |
| 404 | typedef OpaquePtr<QualType> TypeTy; |
| 405 | |
| 406 | OpenCLOptions OpenCLFeatures; |
| 407 | FPOptions CurFPFeatures; |
| 408 | |
| 409 | const LangOptions &LangOpts; |
| 410 | Preprocessor &PP; |
| 411 | ASTContext &Context; |
| 412 | ASTConsumer &Consumer; |
| 413 | DiagnosticsEngine &Diags; |
| 414 | SourceManager &SourceMgr; |
| 415 | |
| 416 | /// Flag indicating whether or not to collect detailed statistics. |
| 417 | bool CollectStats; |
| 418 | |
| 419 | /// Code-completion consumer. |
| 420 | CodeCompleteConsumer *CodeCompleter; |
| 421 | |
| 422 | /// CurContext - This is the current declaration context of parsing. |
| 423 | DeclContext *CurContext; |
| 424 | |
| 425 | /// Generally null except when we temporarily switch decl contexts, |
| 426 | /// like in \see ActOnObjCTemporaryExitContainerContext. |
| 427 | DeclContext *OriginalLexicalContext; |
| 428 | |
| 429 | /// VAListTagName - The declaration name corresponding to __va_list_tag. |
| 430 | /// This is used as part of a hack to omit that class from ADL results. |
| 431 | DeclarationName VAListTagName; |
| 432 | |
| 433 | bool MSStructPragmaOn; // True when \#pragma ms_struct on |
| 434 | |
| 435 | /// Controls member pointer representation format under the MS ABI. |
| 436 | LangOptions::PragmaMSPointersToMembersKind |
| 437 | MSPointerToMemberRepresentationMethod; |
| 438 | |
| 439 | /// Stack of active SEH __finally scopes. Can be empty. |
| 440 | SmallVector<Scope*, 2> CurrentSEHFinally; |
| 441 | |
| 442 | /// Source location for newly created implicit MSInheritanceAttrs |
| 443 | SourceLocation ImplicitMSInheritanceAttrLoc; |
| 444 | |
| 445 | /// Holds TypoExprs that are created from `createDelayedTypo`. This is used by |
| 446 | /// `TransformTypos` in order to keep track of any TypoExprs that are created |
| 447 | /// recursively during typo correction and wipe them away if the correction |
| 448 | /// fails. |
| 449 | llvm::SmallVector<TypoExpr *, 2> TypoExprs; |
| 450 | |
| 451 | /// pragma clang section kind |
| 452 | enum PragmaClangSectionKind { |
| 453 | PCSK_Invalid = 0, |
| 454 | PCSK_BSS = 1, |
| 455 | PCSK_Data = 2, |
| 456 | PCSK_Rodata = 3, |
| 457 | PCSK_Text = 4, |
| 458 | PCSK_Relro = 5 |
| 459 | }; |
| 460 | |
| 461 | enum PragmaClangSectionAction { |
| 462 | PCSA_Set = 0, |
| 463 | PCSA_Clear = 1 |
| 464 | }; |
| 465 | |
| 466 | struct PragmaClangSection { |
| 467 | std::string SectionName; |
| 468 | bool Valid = false; |
| 469 | SourceLocation PragmaLocation; |
| 470 | }; |
| 471 | |
| 472 | PragmaClangSection PragmaClangBSSSection; |
| 473 | PragmaClangSection PragmaClangDataSection; |
| 474 | PragmaClangSection PragmaClangRodataSection; |
| 475 | PragmaClangSection PragmaClangRelroSection; |
| 476 | PragmaClangSection PragmaClangTextSection; |
| 477 | |
| 478 | enum PragmaMsStackAction { |
| 479 | PSK_Reset = 0x0, // #pragma () |
| 480 | PSK_Set = 0x1, // #pragma (value) |
| 481 | PSK_Push = 0x2, // #pragma (push[, id]) |
| 482 | PSK_Pop = 0x4, // #pragma (pop[, id]) |
| 483 | PSK_Show = 0x8, // #pragma (show) -- only for "pack"! |
| 484 | PSK_Push_Set = PSK_Push | PSK_Set, // #pragma (push[, id], value) |
| 485 | PSK_Pop_Set = PSK_Pop | PSK_Set, // #pragma (pop[, id], value) |
| 486 | }; |
| 487 | |
| 488 | // #pragma pack and align. |
| 489 | class AlignPackInfo { |
| 490 | public: |
| 491 | // `Native` represents default align mode, which may vary based on the |
| 492 | // platform. |
| 493 | enum Mode : unsigned char { Native, Natural, Packed, Mac68k }; |
| 494 | |
| 495 | // #pragma pack info constructor |
| 496 | AlignPackInfo(AlignPackInfo::Mode M, unsigned Num, bool IsXL) |
| 497 | : PackAttr(true), AlignMode(M), PackNumber(Num), XLStack(IsXL) { |
| 498 | assert(Num == PackNumber && "The pack number has been truncated.")((Num == PackNumber && "The pack number has been truncated." ) ? static_cast<void> (0) : __assert_fail ("Num == PackNumber && \"The pack number has been truncated.\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 498, __PRETTY_FUNCTION__)); |
| 499 | } |
| 500 | |
| 501 | // #pragma align info constructor |
| 502 | AlignPackInfo(AlignPackInfo::Mode M, bool IsXL) |
| 503 | : PackAttr(false), AlignMode(M), |
| 504 | PackNumber(M == Packed ? 1 : UninitPackVal), XLStack(IsXL) {} |
| 505 | |
| 506 | explicit AlignPackInfo(bool IsXL) : AlignPackInfo(Native, IsXL) {} |
| 507 | |
| 508 | AlignPackInfo() : AlignPackInfo(Native, false) {} |
| 509 | |
| 510 | // When a AlignPackInfo itself cannot be used, this returns an 32-bit |
| 511 | // integer encoding for it. This should only be passed to |
| 512 | // AlignPackInfo::getFromRawEncoding, it should not be inspected directly. |
| 513 | static uint32_t getRawEncoding(const AlignPackInfo &Info) { |
| 514 | std::uint32_t Encoding{}; |
| 515 | if (Info.IsXLStack()) |
| 516 | Encoding |= IsXLMask; |
| 517 | |
| 518 | Encoding |= static_cast<uint32_t>(Info.getAlignMode()) << 1; |
| 519 | |
| 520 | if (Info.IsPackAttr()) |
| 521 | Encoding |= PackAttrMask; |
| 522 | |
| 523 | Encoding |= static_cast<uint32_t>(Info.getPackNumber()) << 4; |
| 524 | |
| 525 | return Encoding; |
| 526 | } |
| 527 | |
| 528 | static AlignPackInfo getFromRawEncoding(unsigned Encoding) { |
| 529 | bool IsXL = static_cast<bool>(Encoding & IsXLMask); |
| 530 | AlignPackInfo::Mode M = |
| 531 | static_cast<AlignPackInfo::Mode>((Encoding & AlignModeMask) >> 1); |
| 532 | int PackNumber = (Encoding & PackNumMask) >> 4; |
| 533 | |
| 534 | if (Encoding & PackAttrMask) |
| 535 | return AlignPackInfo(M, PackNumber, IsXL); |
| 536 | |
| 537 | return AlignPackInfo(M, IsXL); |
| 538 | } |
| 539 | |
| 540 | bool IsPackAttr() const { return PackAttr; } |
| 541 | |
| 542 | bool IsAlignAttr() const { return !PackAttr; } |
| 543 | |
| 544 | Mode getAlignMode() const { return AlignMode; } |
| 545 | |
| 546 | unsigned getPackNumber() const { return PackNumber; } |
| 547 | |
| 548 | bool IsPackSet() const { |
| 549 | // #pragma align, #pragma pack(), and #pragma pack(0) do not set the pack |
| 550 | // attriute on a decl. |
| 551 | return PackNumber != UninitPackVal && PackNumber != 0; |
| 552 | } |
| 553 | |
| 554 | bool IsXLStack() const { return XLStack; } |
| 555 | |
| 556 | bool operator==(const AlignPackInfo &Info) const { |
| 557 | return std::tie(AlignMode, PackNumber, PackAttr, XLStack) == |
| 558 | std::tie(Info.AlignMode, Info.PackNumber, Info.PackAttr, |
| 559 | Info.XLStack); |
| 560 | } |
| 561 | |
| 562 | bool operator!=(const AlignPackInfo &Info) const { |
| 563 | return !(*this == Info); |
| 564 | } |
| 565 | |
| 566 | private: |
| 567 | /// \brief True if this is a pragma pack attribute, |
| 568 | /// not a pragma align attribute. |
| 569 | bool PackAttr; |
| 570 | |
| 571 | /// \brief The alignment mode that is in effect. |
| 572 | Mode AlignMode; |
| 573 | |
| 574 | /// \brief The pack number of the stack. |
| 575 | unsigned char PackNumber; |
| 576 | |
| 577 | /// \brief True if it is a XL #pragma align/pack stack. |
| 578 | bool XLStack; |
| 579 | |
| 580 | /// \brief Uninitialized pack value. |
| 581 | static constexpr unsigned char UninitPackVal = -1; |
| 582 | |
| 583 | // Masks to encode and decode an AlignPackInfo. |
| 584 | static constexpr uint32_t IsXLMask{0x0000'0001}; |
| 585 | static constexpr uint32_t AlignModeMask{0x0000'0006}; |
| 586 | static constexpr uint32_t PackAttrMask{0x00000'0008}; |
| 587 | static constexpr uint32_t PackNumMask{0x0000'01F0}; |
| 588 | }; |
| 589 | |
| 590 | template<typename ValueType> |
| 591 | struct PragmaStack { |
| 592 | struct Slot { |
| 593 | llvm::StringRef StackSlotLabel; |
| 594 | ValueType Value; |
| 595 | SourceLocation PragmaLocation; |
| 596 | SourceLocation PragmaPushLocation; |
| 597 | Slot(llvm::StringRef StackSlotLabel, ValueType Value, |
| 598 | SourceLocation PragmaLocation, SourceLocation PragmaPushLocation) |
| 599 | : StackSlotLabel(StackSlotLabel), Value(Value), |
| 600 | PragmaLocation(PragmaLocation), |
| 601 | PragmaPushLocation(PragmaPushLocation) {} |
| 602 | }; |
| 603 | |
| 604 | void Act(SourceLocation PragmaLocation, PragmaMsStackAction Action, |
| 605 | llvm::StringRef StackSlotLabel, ValueType Value) { |
| 606 | if (Action == PSK_Reset) { |
| 607 | CurrentValue = DefaultValue; |
| 608 | CurrentPragmaLocation = PragmaLocation; |
| 609 | return; |
| 610 | } |
| 611 | if (Action & PSK_Push) |
| 612 | Stack.emplace_back(StackSlotLabel, CurrentValue, CurrentPragmaLocation, |
| 613 | PragmaLocation); |
| 614 | else if (Action & PSK_Pop) { |
| 615 | if (!StackSlotLabel.empty()) { |
| 616 | // If we've got a label, try to find it and jump there. |
| 617 | auto I = llvm::find_if(llvm::reverse(Stack), [&](const Slot &x) { |
| 618 | return x.StackSlotLabel == StackSlotLabel; |
| 619 | }); |
| 620 | // If we found the label so pop from there. |
| 621 | if (I != Stack.rend()) { |
| 622 | CurrentValue = I->Value; |
| 623 | CurrentPragmaLocation = I->PragmaLocation; |
| 624 | Stack.erase(std::prev(I.base()), Stack.end()); |
| 625 | } |
| 626 | } else if (!Stack.empty()) { |
| 627 | // We do not have a label, just pop the last entry. |
| 628 | CurrentValue = Stack.back().Value; |
| 629 | CurrentPragmaLocation = Stack.back().PragmaLocation; |
| 630 | Stack.pop_back(); |
| 631 | } |
| 632 | } |
| 633 | if (Action & PSK_Set) { |
| 634 | CurrentValue = Value; |
| 635 | CurrentPragmaLocation = PragmaLocation; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | // MSVC seems to add artificial slots to #pragma stacks on entering a C++ |
| 640 | // method body to restore the stacks on exit, so it works like this: |
| 641 | // |
| 642 | // struct S { |
| 643 | // #pragma <name>(push, InternalPragmaSlot, <current_pragma_value>) |
| 644 | // void Method {} |
| 645 | // #pragma <name>(pop, InternalPragmaSlot) |
| 646 | // }; |
| 647 | // |
| 648 | // It works even with #pragma vtordisp, although MSVC doesn't support |
| 649 | // #pragma vtordisp(push [, id], n) |
| 650 | // syntax. |
| 651 | // |
| 652 | // Push / pop a named sentinel slot. |
| 653 | void SentinelAction(PragmaMsStackAction Action, StringRef Label) { |
| 654 | assert((Action == PSK_Push || Action == PSK_Pop) &&(((Action == PSK_Push || Action == PSK_Pop) && "Can only push / pop #pragma stack sentinels!" ) ? static_cast<void> (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 655, __PRETTY_FUNCTION__)) |
| 655 | "Can only push / pop #pragma stack sentinels!")(((Action == PSK_Push || Action == PSK_Pop) && "Can only push / pop #pragma stack sentinels!" ) ? static_cast<void> (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 655, __PRETTY_FUNCTION__)); |
| 656 | Act(CurrentPragmaLocation, Action, Label, CurrentValue); |
| 657 | } |
| 658 | |
| 659 | // Constructors. |
| 660 | explicit PragmaStack(const ValueType &Default) |
| 661 | : DefaultValue(Default), CurrentValue(Default) {} |
| 662 | |
| 663 | bool hasValue() const { return CurrentValue != DefaultValue; } |
| 664 | |
| 665 | SmallVector<Slot, 2> Stack; |
| 666 | ValueType DefaultValue; // Value used for PSK_Reset action. |
| 667 | ValueType CurrentValue; |
| 668 | SourceLocation CurrentPragmaLocation; |
| 669 | }; |
| 670 | // FIXME: We should serialize / deserialize these if they occur in a PCH (but |
| 671 | // we shouldn't do so if they're in a module). |
| 672 | |
| 673 | /// Whether to insert vtordisps prior to virtual bases in the Microsoft |
| 674 | /// C++ ABI. Possible values are 0, 1, and 2, which mean: |
| 675 | /// |
| 676 | /// 0: Suppress all vtordisps |
| 677 | /// 1: Insert vtordisps in the presence of vbase overrides and non-trivial |
| 678 | /// structors |
| 679 | /// 2: Always insert vtordisps to support RTTI on partially constructed |
| 680 | /// objects |
| 681 | PragmaStack<MSVtorDispMode> VtorDispStack; |
| 682 | PragmaStack<AlignPackInfo> AlignPackStack; |
| 683 | // The current #pragma align/pack values and locations at each #include. |
| 684 | struct AlignPackIncludeState { |
| 685 | AlignPackInfo CurrentValue; |
| 686 | SourceLocation CurrentPragmaLocation; |
| 687 | bool HasNonDefaultValue, ShouldWarnOnInclude; |
| 688 | }; |
| 689 | SmallVector<AlignPackIncludeState, 8> AlignPackIncludeStack; |
| 690 | // Segment #pragmas. |
| 691 | PragmaStack<StringLiteral *> DataSegStack; |
| 692 | PragmaStack<StringLiteral *> BSSSegStack; |
| 693 | PragmaStack<StringLiteral *> ConstSegStack; |
| 694 | PragmaStack<StringLiteral *> CodeSegStack; |
| 695 | |
| 696 | // This stack tracks the current state of Sema.CurFPFeatures. |
| 697 | PragmaStack<FPOptionsOverride> FpPragmaStack; |
| 698 | FPOptionsOverride CurFPFeatureOverrides() { |
| 699 | FPOptionsOverride result; |
| 700 | if (!FpPragmaStack.hasValue()) { |
| 701 | result = FPOptionsOverride(); |
| 702 | } else { |
| 703 | result = FpPragmaStack.CurrentValue; |
| 704 | } |
| 705 | return result; |
| 706 | } |
| 707 | |
| 708 | // RAII object to push / pop sentinel slots for all MS #pragma stacks. |
| 709 | // Actions should be performed only if we enter / exit a C++ method body. |
| 710 | class PragmaStackSentinelRAII { |
| 711 | public: |
| 712 | PragmaStackSentinelRAII(Sema &S, StringRef SlotLabel, bool ShouldAct); |
| 713 | ~PragmaStackSentinelRAII(); |
| 714 | |
| 715 | private: |
| 716 | Sema &S; |
| 717 | StringRef SlotLabel; |
| 718 | bool ShouldAct; |
| 719 | }; |
| 720 | |
| 721 | /// A mapping that describes the nullability we've seen in each header file. |
| 722 | FileNullabilityMap NullabilityMap; |
| 723 | |
| 724 | /// Last section used with #pragma init_seg. |
| 725 | StringLiteral *CurInitSeg; |
| 726 | SourceLocation CurInitSegLoc; |
| 727 | |
| 728 | /// VisContext - Manages the stack for \#pragma GCC visibility. |
| 729 | void *VisContext; // Really a "PragmaVisStack*" |
| 730 | |
| 731 | /// This an attribute introduced by \#pragma clang attribute. |
| 732 | struct PragmaAttributeEntry { |
| 733 | SourceLocation Loc; |
| 734 | ParsedAttr *Attribute; |
| 735 | SmallVector<attr::SubjectMatchRule, 4> MatchRules; |
| 736 | bool IsUsed; |
| 737 | }; |
| 738 | |
| 739 | /// A push'd group of PragmaAttributeEntries. |
| 740 | struct PragmaAttributeGroup { |
| 741 | /// The location of the push attribute. |
| 742 | SourceLocation Loc; |
| 743 | /// The namespace of this push group. |
| 744 | const IdentifierInfo *Namespace; |
| 745 | SmallVector<PragmaAttributeEntry, 2> Entries; |
| 746 | }; |
| 747 | |
| 748 | SmallVector<PragmaAttributeGroup, 2> PragmaAttributeStack; |
| 749 | |
| 750 | /// The declaration that is currently receiving an attribute from the |
| 751 | /// #pragma attribute stack. |
| 752 | const Decl *PragmaAttributeCurrentTargetDecl; |
| 753 | |
| 754 | /// This represents the last location of a "#pragma clang optimize off" |
| 755 | /// directive if such a directive has not been closed by an "on" yet. If |
| 756 | /// optimizations are currently "on", this is set to an invalid location. |
| 757 | SourceLocation OptimizeOffPragmaLocation; |
| 758 | |
| 759 | /// Flag indicating if Sema is building a recovery call expression. |
| 760 | /// |
| 761 | /// This flag is used to avoid building recovery call expressions |
| 762 | /// if Sema is already doing so, which would cause infinite recursions. |
| 763 | bool IsBuildingRecoveryCallExpr; |
| 764 | |
| 765 | /// Used to control the generation of ExprWithCleanups. |
| 766 | CleanupInfo Cleanup; |
| 767 | |
| 768 | /// ExprCleanupObjects - This is the stack of objects requiring |
| 769 | /// cleanup that are created by the current full expression. |
| 770 | SmallVector<ExprWithCleanups::CleanupObject, 8> ExprCleanupObjects; |
| 771 | |
| 772 | /// Store a set of either DeclRefExprs or MemberExprs that contain a reference |
| 773 | /// to a variable (constant) that may or may not be odr-used in this Expr, and |
| 774 | /// we won't know until all lvalue-to-rvalue and discarded value conversions |
| 775 | /// have been applied to all subexpressions of the enclosing full expression. |
| 776 | /// This is cleared at the end of each full expression. |
| 777 | using MaybeODRUseExprSet = llvm::SetVector<Expr *, SmallVector<Expr *, 4>, |
| 778 | llvm::SmallPtrSet<Expr *, 4>>; |
| 779 | MaybeODRUseExprSet MaybeODRUseExprs; |
| 780 | |
| 781 | std::unique_ptr<sema::FunctionScopeInfo> CachedFunctionScope; |
| 782 | |
| 783 | /// Stack containing information about each of the nested |
| 784 | /// function, block, and method scopes that are currently active. |
| 785 | SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; |
| 786 | |
| 787 | /// The index of the first FunctionScope that corresponds to the current |
| 788 | /// context. |
| 789 | unsigned FunctionScopesStart = 0; |
| 790 | |
| 791 | ArrayRef<sema::FunctionScopeInfo*> getFunctionScopes() const { |
| 792 | return llvm::makeArrayRef(FunctionScopes.begin() + FunctionScopesStart, |
| 793 | FunctionScopes.end()); |
| 794 | } |
| 795 | |
| 796 | /// Stack containing information needed when in C++2a an 'auto' is encountered |
| 797 | /// in a function declaration parameter type specifier in order to invent a |
| 798 | /// corresponding template parameter in the enclosing abbreviated function |
| 799 | /// template. This information is also present in LambdaScopeInfo, stored in |
| 800 | /// the FunctionScopes stack. |
| 801 | SmallVector<InventedTemplateParameterInfo, 4> InventedParameterInfos; |
| 802 | |
| 803 | /// The index of the first InventedParameterInfo that refers to the current |
| 804 | /// context. |
| 805 | unsigned InventedParameterInfosStart = 0; |
| 806 | |
| 807 | ArrayRef<InventedTemplateParameterInfo> getInventedParameterInfos() const { |
| 808 | return llvm::makeArrayRef(InventedParameterInfos.begin() + |
| 809 | InventedParameterInfosStart, |
| 810 | InventedParameterInfos.end()); |
| 811 | } |
| 812 | |
| 813 | typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, |
| 814 | &ExternalSemaSource::ReadExtVectorDecls, 2, 2> |
| 815 | ExtVectorDeclsType; |
| 816 | |
| 817 | /// ExtVectorDecls - This is a list all the extended vector types. This allows |
| 818 | /// us to associate a raw vector type with one of the ext_vector type names. |
| 819 | /// This is only necessary for issuing pretty diagnostics. |
| 820 | ExtVectorDeclsType ExtVectorDecls; |
| 821 | |
| 822 | /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. |
| 823 | std::unique_ptr<CXXFieldCollector> FieldCollector; |
| 824 | |
| 825 | typedef llvm::SmallSetVector<NamedDecl *, 16> NamedDeclSetType; |
| 826 | |
| 827 | /// Set containing all declared private fields that are not used. |
| 828 | NamedDeclSetType UnusedPrivateFields; |
| 829 | |
| 830 | /// Set containing all typedefs that are likely unused. |
| 831 | llvm::SmallSetVector<const TypedefNameDecl *, 4> |
| 832 | UnusedLocalTypedefNameCandidates; |
| 833 | |
| 834 | /// Delete-expressions to be analyzed at the end of translation unit |
| 835 | /// |
| 836 | /// This list contains class members, and locations of delete-expressions |
| 837 | /// that could not be proven as to whether they mismatch with new-expression |
| 838 | /// used in initializer of the field. |
| 839 | typedef std::pair<SourceLocation, bool> DeleteExprLoc; |
| 840 | typedef llvm::SmallVector<DeleteExprLoc, 4> DeleteLocs; |
| 841 | llvm::MapVector<FieldDecl *, DeleteLocs> DeleteExprs; |
| 842 | |
| 843 | typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; |
| 844 | |
| 845 | /// PureVirtualClassDiagSet - a set of class declarations which we have |
| 846 | /// emitted a list of pure virtual functions. Used to prevent emitting the |
| 847 | /// same list more than once. |
| 848 | std::unique_ptr<RecordDeclSetTy> PureVirtualClassDiagSet; |
| 849 | |
| 850 | /// ParsingInitForAutoVars - a set of declarations with auto types for which |
| 851 | /// we are currently parsing the initializer. |
| 852 | llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; |
| 853 | |
| 854 | /// Look for a locally scoped extern "C" declaration by the given name. |
| 855 | NamedDecl *findLocallyScopedExternCDecl(DeclarationName Name); |
| 856 | |
| 857 | typedef LazyVector<VarDecl *, ExternalSemaSource, |
| 858 | &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> |
| 859 | TentativeDefinitionsType; |
| 860 | |
| 861 | /// All the tentative definitions encountered in the TU. |
| 862 | TentativeDefinitionsType TentativeDefinitions; |
| 863 | |
| 864 | /// All the external declarations encoutered and used in the TU. |
| 865 | SmallVector<VarDecl *, 4> ExternalDeclarations; |
| 866 | |
| 867 | typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, |
| 868 | &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> |
| 869 | UnusedFileScopedDeclsType; |
| 870 | |
| 871 | /// The set of file scoped decls seen so far that have not been used |
| 872 | /// and must warn if not used. Only contains the first declaration. |
| 873 | UnusedFileScopedDeclsType UnusedFileScopedDecls; |
| 874 | |
| 875 | typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, |
| 876 | &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> |
| 877 | DelegatingCtorDeclsType; |
| 878 | |
| 879 | /// All the delegating constructors seen so far in the file, used for |
| 880 | /// cycle detection at the end of the TU. |
| 881 | DelegatingCtorDeclsType DelegatingCtorDecls; |
| 882 | |
| 883 | /// All the overriding functions seen during a class definition |
| 884 | /// that had their exception spec checks delayed, plus the overridden |
| 885 | /// function. |
| 886 | SmallVector<std::pair<const CXXMethodDecl*, const CXXMethodDecl*>, 2> |
| 887 | DelayedOverridingExceptionSpecChecks; |
| 888 | |
| 889 | /// All the function redeclarations seen during a class definition that had |
| 890 | /// their exception spec checks delayed, plus the prior declaration they |
| 891 | /// should be checked against. Except during error recovery, the new decl |
| 892 | /// should always be a friend declaration, as that's the only valid way to |
| 893 | /// redeclare a special member before its class is complete. |
| 894 | SmallVector<std::pair<FunctionDecl*, FunctionDecl*>, 2> |
| 895 | DelayedEquivalentExceptionSpecChecks; |
| 896 | |
| 897 | typedef llvm::MapVector<const FunctionDecl *, |
| 898 | std::unique_ptr<LateParsedTemplate>> |
| 899 | LateParsedTemplateMapT; |
| 900 | LateParsedTemplateMapT LateParsedTemplateMap; |
| 901 | |
| 902 | /// Callback to the parser to parse templated functions when needed. |
| 903 | typedef void LateTemplateParserCB(void *P, LateParsedTemplate &LPT); |
| 904 | typedef void LateTemplateParserCleanupCB(void *P); |
| 905 | LateTemplateParserCB *LateTemplateParser; |
| 906 | LateTemplateParserCleanupCB *LateTemplateParserCleanup; |
| 907 | void *OpaqueParser; |
| 908 | |
| 909 | void SetLateTemplateParser(LateTemplateParserCB *LTP, |
| 910 | LateTemplateParserCleanupCB *LTPCleanup, |
| 911 | void *P) { |
| 912 | LateTemplateParser = LTP; |
| 913 | LateTemplateParserCleanup = LTPCleanup; |
| 914 | OpaqueParser = P; |
| 915 | } |
| 916 | |
| 917 | class DelayedDiagnostics; |
| 918 | |
| 919 | class DelayedDiagnosticsState { |
| 920 | sema::DelayedDiagnosticPool *SavedPool; |
| 921 | friend class Sema::DelayedDiagnostics; |
| 922 | }; |
| 923 | typedef DelayedDiagnosticsState ParsingDeclState; |
| 924 | typedef DelayedDiagnosticsState ProcessingContextState; |
| 925 | |
| 926 | /// A class which encapsulates the logic for delaying diagnostics |
| 927 | /// during parsing and other processing. |
| 928 | class DelayedDiagnostics { |
| 929 | /// The current pool of diagnostics into which delayed |
| 930 | /// diagnostics should go. |
| 931 | sema::DelayedDiagnosticPool *CurPool; |
| 932 | |
| 933 | public: |
| 934 | DelayedDiagnostics() : CurPool(nullptr) {} |
| 935 | |
| 936 | /// Adds a delayed diagnostic. |
| 937 | void add(const sema::DelayedDiagnostic &diag); // in DelayedDiagnostic.h |
| 938 | |
| 939 | /// Determines whether diagnostics should be delayed. |
| 940 | bool shouldDelayDiagnostics() { return CurPool != nullptr; } |
| 941 | |
| 942 | /// Returns the current delayed-diagnostics pool. |
| 943 | sema::DelayedDiagnosticPool *getCurrentPool() const { |
| 944 | return CurPool; |
| 945 | } |
| 946 | |
| 947 | /// Enter a new scope. Access and deprecation diagnostics will be |
| 948 | /// collected in this pool. |
| 949 | DelayedDiagnosticsState push(sema::DelayedDiagnosticPool &pool) { |
| 950 | DelayedDiagnosticsState state; |
| 951 | state.SavedPool = CurPool; |
| 952 | CurPool = &pool; |
| 953 | return state; |
| 954 | } |
| 955 | |
| 956 | /// Leave a delayed-diagnostic state that was previously pushed. |
| 957 | /// Do not emit any of the diagnostics. This is performed as part |
| 958 | /// of the bookkeeping of popping a pool "properly". |
| 959 | void popWithoutEmitting(DelayedDiagnosticsState state) { |
| 960 | CurPool = state.SavedPool; |
| 961 | } |
| 962 | |
| 963 | /// Enter a new scope where access and deprecation diagnostics are |
| 964 | /// not delayed. |
| 965 | DelayedDiagnosticsState pushUndelayed() { |
| 966 | DelayedDiagnosticsState state; |
| 967 | state.SavedPool = CurPool; |
| 968 | CurPool = nullptr; |
| 969 | return state; |
| 970 | } |
| 971 | |
| 972 | /// Undo a previous pushUndelayed(). |
| 973 | void popUndelayed(DelayedDiagnosticsState state) { |
| 974 | assert(CurPool == nullptr)((CurPool == nullptr) ? static_cast<void> (0) : __assert_fail ("CurPool == nullptr", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 974, __PRETTY_FUNCTION__)); |
| 975 | CurPool = state.SavedPool; |
| 976 | } |
| 977 | } DelayedDiagnostics; |
| 978 | |
| 979 | /// A RAII object to temporarily push a declaration context. |
| 980 | class ContextRAII { |
| 981 | private: |
| 982 | Sema &S; |
| 983 | DeclContext *SavedContext; |
| 984 | ProcessingContextState SavedContextState; |
| 985 | QualType SavedCXXThisTypeOverride; |
| 986 | unsigned SavedFunctionScopesStart; |
| 987 | unsigned SavedInventedParameterInfosStart; |
| 988 | |
| 989 | public: |
| 990 | ContextRAII(Sema &S, DeclContext *ContextToPush, bool NewThisContext = true) |
| 991 | : S(S), SavedContext(S.CurContext), |
| 992 | SavedContextState(S.DelayedDiagnostics.pushUndelayed()), |
| 993 | SavedCXXThisTypeOverride(S.CXXThisTypeOverride), |
| 994 | SavedFunctionScopesStart(S.FunctionScopesStart), |
| 995 | SavedInventedParameterInfosStart(S.InventedParameterInfosStart) |
| 996 | { |
| 997 | assert(ContextToPush && "pushing null context")((ContextToPush && "pushing null context") ? static_cast <void> (0) : __assert_fail ("ContextToPush && \"pushing null context\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 997, __PRETTY_FUNCTION__)); |
| 998 | S.CurContext = ContextToPush; |
| 999 | if (NewThisContext) |
| 1000 | S.CXXThisTypeOverride = QualType(); |
| 1001 | // Any saved FunctionScopes do not refer to this context. |
| 1002 | S.FunctionScopesStart = S.FunctionScopes.size(); |
| 1003 | S.InventedParameterInfosStart = S.InventedParameterInfos.size(); |
| 1004 | } |
| 1005 | |
| 1006 | void pop() { |
| 1007 | if (!SavedContext) return; |
| 1008 | S.CurContext = SavedContext; |
| 1009 | S.DelayedDiagnostics.popUndelayed(SavedContextState); |
| 1010 | S.CXXThisTypeOverride = SavedCXXThisTypeOverride; |
| 1011 | S.FunctionScopesStart = SavedFunctionScopesStart; |
| 1012 | S.InventedParameterInfosStart = SavedInventedParameterInfosStart; |
| 1013 | SavedContext = nullptr; |
| 1014 | } |
| 1015 | |
| 1016 | ~ContextRAII() { |
| 1017 | pop(); |
| 1018 | } |
| 1019 | }; |
| 1020 | |
| 1021 | /// Whether the AST is currently being rebuilt to correct immediate |
| 1022 | /// invocations. Immediate invocation candidates and references to consteval |
| 1023 | /// functions aren't tracked when this is set. |
| 1024 | bool RebuildingImmediateInvocation = false; |
| 1025 | |
| 1026 | /// Used to change context to isConstantEvaluated without pushing a heavy |
| 1027 | /// ExpressionEvaluationContextRecord object. |
| 1028 | bool isConstantEvaluatedOverride; |
| 1029 | |
| 1030 | bool isConstantEvaluated() { |
| 1031 | return ExprEvalContexts.back().isConstantEvaluated() || |
| 1032 | isConstantEvaluatedOverride; |
| 1033 | } |
| 1034 | |
| 1035 | /// RAII object to handle the state changes required to synthesize |
| 1036 | /// a function body. |
| 1037 | class SynthesizedFunctionScope { |
| 1038 | Sema &S; |
| 1039 | Sema::ContextRAII SavedContext; |
| 1040 | bool PushedCodeSynthesisContext = false; |
| 1041 | |
| 1042 | public: |
| 1043 | SynthesizedFunctionScope(Sema &S, DeclContext *DC) |
| 1044 | : S(S), SavedContext(S, DC) { |
| 1045 | S.PushFunctionScope(); |
| 1046 | S.PushExpressionEvaluationContext( |
| 1047 | Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| 1048 | if (auto *FD = dyn_cast<FunctionDecl>(DC)) |
| 1049 | FD->setWillHaveBody(true); |
| 1050 | else |
| 1051 | assert(isa<ObjCMethodDecl>(DC))((isa<ObjCMethodDecl>(DC)) ? static_cast<void> (0 ) : __assert_fail ("isa<ObjCMethodDecl>(DC)", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 1051, __PRETTY_FUNCTION__)); |
| 1052 | } |
| 1053 | |
| 1054 | void addContextNote(SourceLocation UseLoc) { |
| 1055 | assert(!PushedCodeSynthesisContext)((!PushedCodeSynthesisContext) ? static_cast<void> (0) : __assert_fail ("!PushedCodeSynthesisContext", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 1055, __PRETTY_FUNCTION__)); |
| 1056 | |
| 1057 | Sema::CodeSynthesisContext Ctx; |
| 1058 | Ctx.Kind = Sema::CodeSynthesisContext::DefiningSynthesizedFunction; |
| 1059 | Ctx.PointOfInstantiation = UseLoc; |
| 1060 | Ctx.Entity = cast<Decl>(S.CurContext); |
| 1061 | S.pushCodeSynthesisContext(Ctx); |
| 1062 | |
| 1063 | PushedCodeSynthesisContext = true; |
| 1064 | } |
| 1065 | |
| 1066 | ~SynthesizedFunctionScope() { |
| 1067 | if (PushedCodeSynthesisContext) |
| 1068 | S.popCodeSynthesisContext(); |
| 1069 | if (auto *FD = dyn_cast<FunctionDecl>(S.CurContext)) |
| 1070 | FD->setWillHaveBody(false); |
| 1071 | S.PopExpressionEvaluationContext(); |
| 1072 | S.PopFunctionScopeInfo(); |
| 1073 | } |
| 1074 | }; |
| 1075 | |
| 1076 | /// WeakUndeclaredIdentifiers - Identifiers contained in |
| 1077 | /// \#pragma weak before declared. rare. may alias another |
| 1078 | /// identifier, declared or undeclared |
| 1079 | llvm::MapVector<IdentifierInfo *, WeakInfo> WeakUndeclaredIdentifiers; |
| 1080 | |
| 1081 | /// ExtnameUndeclaredIdentifiers - Identifiers contained in |
| 1082 | /// \#pragma redefine_extname before declared. Used in Solaris system headers |
| 1083 | /// to define functions that occur in multiple standards to call the version |
| 1084 | /// in the currently selected standard. |
| 1085 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; |
| 1086 | |
| 1087 | |
| 1088 | /// Load weak undeclared identifiers from the external source. |
| 1089 | void LoadExternalWeakUndeclaredIdentifiers(); |
| 1090 | |
| 1091 | /// WeakTopLevelDecl - Translation-unit scoped declarations generated by |
| 1092 | /// \#pragma weak during processing of other Decls. |
| 1093 | /// I couldn't figure out a clean way to generate these in-line, so |
| 1094 | /// we store them here and handle separately -- which is a hack. |
| 1095 | /// It would be best to refactor this. |
| 1096 | SmallVector<Decl*,2> WeakTopLevelDecl; |
| 1097 | |
| 1098 | IdentifierResolver IdResolver; |
| 1099 | |
| 1100 | /// Translation Unit Scope - useful to Objective-C actions that need |
| 1101 | /// to lookup file scope declarations in the "ordinary" C decl namespace. |
| 1102 | /// For example, user-defined classes, built-in "id" type, etc. |
| 1103 | Scope *TUScope; |
| 1104 | |
| 1105 | /// The C++ "std" namespace, where the standard library resides. |
| 1106 | LazyDeclPtr StdNamespace; |
| 1107 | |
| 1108 | /// The C++ "std::bad_alloc" class, which is defined by the C++ |
| 1109 | /// standard library. |
| 1110 | LazyDeclPtr StdBadAlloc; |
| 1111 | |
| 1112 | /// The C++ "std::align_val_t" enum class, which is defined by the C++ |
| 1113 | /// standard library. |
| 1114 | LazyDeclPtr StdAlignValT; |
| 1115 | |
| 1116 | /// The C++ "std::experimental" namespace, where the experimental parts |
| 1117 | /// of the standard library resides. |
| 1118 | NamespaceDecl *StdExperimentalNamespaceCache; |
| 1119 | |
| 1120 | /// The C++ "std::initializer_list" template, which is defined in |
| 1121 | /// \<initializer_list>. |
| 1122 | ClassTemplateDecl *StdInitializerList; |
| 1123 | |
| 1124 | /// The C++ "std::coroutine_traits" template, which is defined in |
| 1125 | /// \<coroutine_traits> |
| 1126 | ClassTemplateDecl *StdCoroutineTraitsCache; |
| 1127 | |
| 1128 | /// The C++ "type_info" declaration, which is defined in \<typeinfo>. |
| 1129 | RecordDecl *CXXTypeInfoDecl; |
| 1130 | |
| 1131 | /// The MSVC "_GUID" struct, which is defined in MSVC header files. |
| 1132 | RecordDecl *MSVCGuidDecl; |
| 1133 | |
| 1134 | /// Caches identifiers/selectors for NSFoundation APIs. |
| 1135 | std::unique_ptr<NSAPI> NSAPIObj; |
| 1136 | |
| 1137 | /// The declaration of the Objective-C NSNumber class. |
| 1138 | ObjCInterfaceDecl *NSNumberDecl; |
| 1139 | |
| 1140 | /// The declaration of the Objective-C NSValue class. |
| 1141 | ObjCInterfaceDecl *NSValueDecl; |
| 1142 | |
| 1143 | /// Pointer to NSNumber type (NSNumber *). |
| 1144 | QualType NSNumberPointer; |
| 1145 | |
| 1146 | /// Pointer to NSValue type (NSValue *). |
| 1147 | QualType NSValuePointer; |
| 1148 | |
| 1149 | /// The Objective-C NSNumber methods used to create NSNumber literals. |
| 1150 | ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; |
| 1151 | |
| 1152 | /// The declaration of the Objective-C NSString class. |
| 1153 | ObjCInterfaceDecl *NSStringDecl; |
| 1154 | |
| 1155 | /// Pointer to NSString type (NSString *). |
| 1156 | QualType NSStringPointer; |
| 1157 | |
| 1158 | /// The declaration of the stringWithUTF8String: method. |
| 1159 | ObjCMethodDecl *StringWithUTF8StringMethod; |
| 1160 | |
| 1161 | /// The declaration of the valueWithBytes:objCType: method. |
| 1162 | ObjCMethodDecl *ValueWithBytesObjCTypeMethod; |
| 1163 | |
| 1164 | /// The declaration of the Objective-C NSArray class. |
| 1165 | ObjCInterfaceDecl *NSArrayDecl; |
| 1166 | |
| 1167 | /// The declaration of the arrayWithObjects:count: method. |
| 1168 | ObjCMethodDecl *ArrayWithObjectsMethod; |
| 1169 | |
| 1170 | /// The declaration of the Objective-C NSDictionary class. |
| 1171 | ObjCInterfaceDecl *NSDictionaryDecl; |
| 1172 | |
| 1173 | /// The declaration of the dictionaryWithObjects:forKeys:count: method. |
| 1174 | ObjCMethodDecl *DictionaryWithObjectsMethod; |
| 1175 | |
| 1176 | /// id<NSCopying> type. |
| 1177 | QualType QIDNSCopying; |
| 1178 | |
| 1179 | /// will hold 'respondsToSelector:' |
| 1180 | Selector RespondsToSelectorSel; |
| 1181 | |
| 1182 | /// A flag to remember whether the implicit forms of operator new and delete |
| 1183 | /// have been declared. |
| 1184 | bool GlobalNewDeleteDeclared; |
| 1185 | |
| 1186 | /// Describes how the expressions currently being parsed are |
| 1187 | /// evaluated at run-time, if at all. |
| 1188 | enum class ExpressionEvaluationContext { |
| 1189 | /// The current expression and its subexpressions occur within an |
| 1190 | /// unevaluated operand (C++11 [expr]p7), such as the subexpression of |
| 1191 | /// \c sizeof, where the type of the expression may be significant but |
| 1192 | /// no code will be generated to evaluate the value of the expression at |
| 1193 | /// run time. |
| 1194 | Unevaluated, |
| 1195 | |
| 1196 | /// The current expression occurs within a braced-init-list within |
| 1197 | /// an unevaluated operand. This is mostly like a regular unevaluated |
| 1198 | /// context, except that we still instantiate constexpr functions that are |
| 1199 | /// referenced here so that we can perform narrowing checks correctly. |
| 1200 | UnevaluatedList, |
| 1201 | |
| 1202 | /// The current expression occurs within a discarded statement. |
| 1203 | /// This behaves largely similarly to an unevaluated operand in preventing |
| 1204 | /// definitions from being required, but not in other ways. |
| 1205 | DiscardedStatement, |
| 1206 | |
| 1207 | /// The current expression occurs within an unevaluated |
| 1208 | /// operand that unconditionally permits abstract references to |
| 1209 | /// fields, such as a SIZE operator in MS-style inline assembly. |
| 1210 | UnevaluatedAbstract, |
| 1211 | |
| 1212 | /// The current context is "potentially evaluated" in C++11 terms, |
| 1213 | /// but the expression is evaluated at compile-time (like the values of |
| 1214 | /// cases in a switch statement). |
| 1215 | ConstantEvaluated, |
| 1216 | |
| 1217 | /// The current expression is potentially evaluated at run time, |
| 1218 | /// which means that code may be generated to evaluate the value of the |
| 1219 | /// expression at run time. |
| 1220 | PotentiallyEvaluated, |
| 1221 | |
| 1222 | /// The current expression is potentially evaluated, but any |
| 1223 | /// declarations referenced inside that expression are only used if |
| 1224 | /// in fact the current expression is used. |
| 1225 | /// |
| 1226 | /// This value is used when parsing default function arguments, for which |
| 1227 | /// we would like to provide diagnostics (e.g., passing non-POD arguments |
| 1228 | /// through varargs) but do not want to mark declarations as "referenced" |
| 1229 | /// until the default argument is used. |
| 1230 | PotentiallyEvaluatedIfUsed |
| 1231 | }; |
| 1232 | |
| 1233 | using ImmediateInvocationCandidate = llvm::PointerIntPair<ConstantExpr *, 1>; |
| 1234 | |
| 1235 | /// Data structure used to record current or nested |
| 1236 | /// expression evaluation contexts. |
| 1237 | struct ExpressionEvaluationContextRecord { |
| 1238 | /// The expression evaluation context. |
| 1239 | ExpressionEvaluationContext Context; |
| 1240 | |
| 1241 | /// Whether the enclosing context needed a cleanup. |
| 1242 | CleanupInfo ParentCleanup; |
| 1243 | |
| 1244 | /// The number of active cleanup objects when we entered |
| 1245 | /// this expression evaluation context. |
| 1246 | unsigned NumCleanupObjects; |
| 1247 | |
| 1248 | /// The number of typos encountered during this expression evaluation |
| 1249 | /// context (i.e. the number of TypoExprs created). |
| 1250 | unsigned NumTypos; |
| 1251 | |
| 1252 | MaybeODRUseExprSet SavedMaybeODRUseExprs; |
| 1253 | |
| 1254 | /// The lambdas that are present within this context, if it |
| 1255 | /// is indeed an unevaluated context. |
| 1256 | SmallVector<LambdaExpr *, 2> Lambdas; |
| 1257 | |
| 1258 | /// The declaration that provides context for lambda expressions |
| 1259 | /// and block literals if the normal declaration context does not |
| 1260 | /// suffice, e.g., in a default function argument. |
| 1261 | Decl *ManglingContextDecl; |
| 1262 | |
| 1263 | /// If we are processing a decltype type, a set of call expressions |
| 1264 | /// for which we have deferred checking the completeness of the return type. |
| 1265 | SmallVector<CallExpr *, 8> DelayedDecltypeCalls; |
| 1266 | |
| 1267 | /// If we are processing a decltype type, a set of temporary binding |
| 1268 | /// expressions for which we have deferred checking the destructor. |
| 1269 | SmallVector<CXXBindTemporaryExpr *, 8> DelayedDecltypeBinds; |
| 1270 | |
| 1271 | llvm::SmallPtrSet<const Expr *, 8> PossibleDerefs; |
| 1272 | |
| 1273 | /// Expressions appearing as the LHS of a volatile assignment in this |
| 1274 | /// context. We produce a warning for these when popping the context if |
| 1275 | /// they are not discarded-value expressions nor unevaluated operands. |
| 1276 | SmallVector<Expr*, 2> VolatileAssignmentLHSs; |
| 1277 | |
| 1278 | /// Set of candidates for starting an immediate invocation. |
| 1279 | llvm::SmallVector<ImmediateInvocationCandidate, 4> ImmediateInvocationCandidates; |
| 1280 | |
| 1281 | /// Set of DeclRefExprs referencing a consteval function when used in a |
| 1282 | /// context not already known to be immediately invoked. |
| 1283 | llvm::SmallPtrSet<DeclRefExpr *, 4> ReferenceToConsteval; |
| 1284 | |
| 1285 | /// \brief Describes whether we are in an expression constext which we have |
| 1286 | /// to handle differently. |
| 1287 | enum ExpressionKind { |
| 1288 | EK_Decltype, EK_TemplateArgument, EK_Other |
| 1289 | } ExprContext; |
| 1290 | |
| 1291 | ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, |
| 1292 | unsigned NumCleanupObjects, |
| 1293 | CleanupInfo ParentCleanup, |
| 1294 | Decl *ManglingContextDecl, |
| 1295 | ExpressionKind ExprContext) |
| 1296 | : Context(Context), ParentCleanup(ParentCleanup), |
| 1297 | NumCleanupObjects(NumCleanupObjects), NumTypos(0), |
| 1298 | ManglingContextDecl(ManglingContextDecl), ExprContext(ExprContext) {} |
| 1299 | |
| 1300 | bool isUnevaluated() const { |
| 1301 | return Context == ExpressionEvaluationContext::Unevaluated || |
| 1302 | Context == ExpressionEvaluationContext::UnevaluatedAbstract || |
| 1303 | Context == ExpressionEvaluationContext::UnevaluatedList; |
| 1304 | } |
| 1305 | bool isConstantEvaluated() const { |
| 1306 | return Context == ExpressionEvaluationContext::ConstantEvaluated; |
| 1307 | } |
| 1308 | }; |
| 1309 | |
| 1310 | /// A stack of expression evaluation contexts. |
| 1311 | SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; |
| 1312 | |
| 1313 | /// Emit a warning for all pending noderef expressions that we recorded. |
| 1314 | void WarnOnPendingNoDerefs(ExpressionEvaluationContextRecord &Rec); |
| 1315 | |
| 1316 | /// Compute the mangling number context for a lambda expression or |
| 1317 | /// block literal. Also return the extra mangling decl if any. |
| 1318 | /// |
| 1319 | /// \param DC - The DeclContext containing the lambda expression or |
| 1320 | /// block literal. |
| 1321 | std::tuple<MangleNumberingContext *, Decl *> |
| 1322 | getCurrentMangleNumberContext(const DeclContext *DC); |
| 1323 | |
| 1324 | |
| 1325 | /// SpecialMemberOverloadResult - The overloading result for a special member |
| 1326 | /// function. |
| 1327 | /// |
| 1328 | /// This is basically a wrapper around PointerIntPair. The lowest bits of the |
| 1329 | /// integer are used to determine whether overload resolution succeeded. |
| 1330 | class SpecialMemberOverloadResult { |
| 1331 | public: |
| 1332 | enum Kind { |
| 1333 | NoMemberOrDeleted, |
| 1334 | Ambiguous, |
| 1335 | Success |
| 1336 | }; |
| 1337 | |
| 1338 | private: |
| 1339 | llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; |
| 1340 | |
| 1341 | public: |
| 1342 | SpecialMemberOverloadResult() : Pair() {} |
| 1343 | SpecialMemberOverloadResult(CXXMethodDecl *MD) |
| 1344 | : Pair(MD, MD->isDeleted() ? NoMemberOrDeleted : Success) {} |
| 1345 | |
| 1346 | CXXMethodDecl *getMethod() const { return Pair.getPointer(); } |
| 1347 | void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } |
| 1348 | |
| 1349 | Kind getKind() const { return static_cast<Kind>(Pair.getInt()); } |
| 1350 | void setKind(Kind K) { Pair.setInt(K); } |
| 1351 | }; |
| 1352 | |
| 1353 | class SpecialMemberOverloadResultEntry |
| 1354 | : public llvm::FastFoldingSetNode, |
| 1355 | public SpecialMemberOverloadResult { |
| 1356 | public: |
| 1357 | SpecialMemberOverloadResultEntry(const llvm::FoldingSetNodeID &ID) |
| 1358 | : FastFoldingSetNode(ID) |
| 1359 | {} |
| 1360 | }; |
| 1361 | |
| 1362 | /// A cache of special member function overload resolution results |
| 1363 | /// for C++ records. |
| 1364 | llvm::FoldingSet<SpecialMemberOverloadResultEntry> SpecialMemberCache; |
| 1365 | |
| 1366 | /// A cache of the flags available in enumerations with the flag_bits |
| 1367 | /// attribute. |
| 1368 | mutable llvm::DenseMap<const EnumDecl*, llvm::APInt> FlagBitsCache; |
| 1369 | |
| 1370 | /// The kind of translation unit we are processing. |
| 1371 | /// |
| 1372 | /// When we're processing a complete translation unit, Sema will perform |
| 1373 | /// end-of-translation-unit semantic tasks (such as creating |
| 1374 | /// initializers for tentative definitions in C) once parsing has |
| 1375 | /// completed. Modules and precompiled headers perform different kinds of |
| 1376 | /// checks. |
| 1377 | TranslationUnitKind TUKind; |
| 1378 | |
| 1379 | llvm::BumpPtrAllocator BumpAlloc; |
| 1380 | |
| 1381 | /// The number of SFINAE diagnostics that have been trapped. |
| 1382 | unsigned NumSFINAEErrors; |
| 1383 | |
| 1384 | typedef llvm::DenseMap<ParmVarDecl *, llvm::TinyPtrVector<ParmVarDecl *>> |
| 1385 | UnparsedDefaultArgInstantiationsMap; |
| 1386 | |
| 1387 | /// A mapping from parameters with unparsed default arguments to the |
| 1388 | /// set of instantiations of each parameter. |
| 1389 | /// |
| 1390 | /// This mapping is a temporary data structure used when parsing |
| 1391 | /// nested class templates or nested classes of class templates, |
| 1392 | /// where we might end up instantiating an inner class before the |
| 1393 | /// default arguments of its methods have been parsed. |
| 1394 | UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; |
| 1395 | |
| 1396 | // Contains the locations of the beginning of unparsed default |
| 1397 | // argument locations. |
| 1398 | llvm::DenseMap<ParmVarDecl *, SourceLocation> UnparsedDefaultArgLocs; |
| 1399 | |
| 1400 | /// UndefinedInternals - all the used, undefined objects which require a |
| 1401 | /// definition in this translation unit. |
| 1402 | llvm::MapVector<NamedDecl *, SourceLocation> UndefinedButUsed; |
| 1403 | |
| 1404 | /// Determine if VD, which must be a variable or function, is an external |
| 1405 | /// symbol that nonetheless can't be referenced from outside this translation |
| 1406 | /// unit because its type has no linkage and it's not extern "C". |
| 1407 | bool isExternalWithNoLinkageType(ValueDecl *VD); |
| 1408 | |
| 1409 | /// Obtain a sorted list of functions that are undefined but ODR-used. |
| 1410 | void getUndefinedButUsed( |
| 1411 | SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined); |
| 1412 | |
| 1413 | /// Retrieves list of suspicious delete-expressions that will be checked at |
| 1414 | /// the end of translation unit. |
| 1415 | const llvm::MapVector<FieldDecl *, DeleteLocs> & |
| 1416 | getMismatchingDeleteExpressions() const; |
| 1417 | |
| 1418 | typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; |
| 1419 | typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; |
| 1420 | |
| 1421 | /// Method Pool - allows efficient lookup when typechecking messages to "id". |
| 1422 | /// We need to maintain a list, since selectors can have differing signatures |
| 1423 | /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% |
| 1424 | /// of selectors are "overloaded"). |
| 1425 | /// At the head of the list it is recorded whether there were 0, 1, or >= 2 |
| 1426 | /// methods inside categories with a particular selector. |
| 1427 | GlobalMethodPool MethodPool; |
| 1428 | |
| 1429 | /// Method selectors used in a \@selector expression. Used for implementation |
| 1430 | /// of -Wselector. |
| 1431 | llvm::MapVector<Selector, SourceLocation> ReferencedSelectors; |
| 1432 | |
| 1433 | /// List of SourceLocations where 'self' is implicitly retained inside a |
| 1434 | /// block. |
| 1435 | llvm::SmallVector<std::pair<SourceLocation, const BlockDecl *>, 1> |
| 1436 | ImplicitlyRetainedSelfLocs; |
| 1437 | |
| 1438 | /// Kinds of C++ special members. |
| 1439 | enum CXXSpecialMember { |
| 1440 | CXXDefaultConstructor, |
| 1441 | CXXCopyConstructor, |
| 1442 | CXXMoveConstructor, |
| 1443 | CXXCopyAssignment, |
| 1444 | CXXMoveAssignment, |
| 1445 | CXXDestructor, |
| 1446 | CXXInvalid |
| 1447 | }; |
| 1448 | |
| 1449 | typedef llvm::PointerIntPair<CXXRecordDecl *, 3, CXXSpecialMember> |
| 1450 | SpecialMemberDecl; |
| 1451 | |
| 1452 | /// The C++ special members which we are currently in the process of |
| 1453 | /// declaring. If this process recursively triggers the declaration of the |
| 1454 | /// same special member, we should act as if it is not yet declared. |
| 1455 | llvm::SmallPtrSet<SpecialMemberDecl, 4> SpecialMembersBeingDeclared; |
| 1456 | |
| 1457 | /// Kinds of defaulted comparison operator functions. |
| 1458 | enum class DefaultedComparisonKind : unsigned char { |
| 1459 | /// This is not a defaultable comparison operator. |
| 1460 | None, |
| 1461 | /// This is an operator== that should be implemented as a series of |
| 1462 | /// subobject comparisons. |
| 1463 | Equal, |
| 1464 | /// This is an operator<=> that should be implemented as a series of |
| 1465 | /// subobject comparisons. |
| 1466 | ThreeWay, |
| 1467 | /// This is an operator!= that should be implemented as a rewrite in terms |
| 1468 | /// of a == comparison. |
| 1469 | NotEqual, |
| 1470 | /// This is an <, <=, >, or >= that should be implemented as a rewrite in |
| 1471 | /// terms of a <=> comparison. |
| 1472 | Relational, |
| 1473 | }; |
| 1474 | |
| 1475 | /// The function definitions which were renamed as part of typo-correction |
| 1476 | /// to match their respective declarations. We want to keep track of them |
| 1477 | /// to ensure that we don't emit a "redefinition" error if we encounter a |
| 1478 | /// correctly named definition after the renamed definition. |
| 1479 | llvm::SmallPtrSet<const NamedDecl *, 4> TypoCorrectedFunctionDefinitions; |
| 1480 | |
| 1481 | /// Stack of types that correspond to the parameter entities that are |
| 1482 | /// currently being copy-initialized. Can be empty. |
| 1483 | llvm::SmallVector<QualType, 4> CurrentParameterCopyTypes; |
| 1484 | |
| 1485 | void ReadMethodPool(Selector Sel); |
| 1486 | void updateOutOfDateSelector(Selector Sel); |
| 1487 | |
| 1488 | /// Private Helper predicate to check for 'self'. |
| 1489 | bool isSelfExpr(Expr *RExpr); |
| 1490 | bool isSelfExpr(Expr *RExpr, const ObjCMethodDecl *Method); |
| 1491 | |
| 1492 | /// Cause the active diagnostic on the DiagosticsEngine to be |
| 1493 | /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and |
| 1494 | /// should not be used elsewhere. |
| 1495 | void EmitCurrentDiagnostic(unsigned DiagID); |
| 1496 | |
| 1497 | /// Records and restores the CurFPFeatures state on entry/exit of compound |
| 1498 | /// statements. |
| 1499 | class FPFeaturesStateRAII { |
| 1500 | public: |
| 1501 | FPFeaturesStateRAII(Sema &S) : S(S), OldFPFeaturesState(S.CurFPFeatures) { |
| 1502 | OldOverrides = S.FpPragmaStack.CurrentValue; |
| 1503 | } |
| 1504 | ~FPFeaturesStateRAII() { |
| 1505 | S.CurFPFeatures = OldFPFeaturesState; |
| 1506 | S.FpPragmaStack.CurrentValue = OldOverrides; |
| 1507 | } |
| 1508 | FPOptionsOverride getOverrides() { return OldOverrides; } |
| 1509 | |
| 1510 | private: |
| 1511 | Sema& S; |
| 1512 | FPOptions OldFPFeaturesState; |
| 1513 | FPOptionsOverride OldOverrides; |
| 1514 | }; |
| 1515 | |
| 1516 | void addImplicitTypedef(StringRef Name, QualType T); |
| 1517 | |
| 1518 | bool WarnedStackExhausted = false; |
| 1519 | |
| 1520 | public: |
| 1521 | Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, |
| 1522 | TranslationUnitKind TUKind = TU_Complete, |
| 1523 | CodeCompleteConsumer *CompletionConsumer = nullptr); |
| 1524 | ~Sema(); |
| 1525 | |
| 1526 | /// Perform initialization that occurs after the parser has been |
| 1527 | /// initialized but before it parses anything. |
| 1528 | void Initialize(); |
| 1529 | |
| 1530 | const LangOptions &getLangOpts() const { return LangOpts; } |
| 1531 | OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } |
| 1532 | FPOptions &getCurFPFeatures() { return CurFPFeatures; } |
| 1533 | |
| 1534 | DiagnosticsEngine &getDiagnostics() const { return Diags; } |
| 1535 | SourceManager &getSourceManager() const { return SourceMgr; } |
| 1536 | Preprocessor &getPreprocessor() const { return PP; } |
| 1537 | ASTContext &getASTContext() const { return Context; } |
| 1538 | ASTConsumer &getASTConsumer() const { return Consumer; } |
| 1539 | ASTMutationListener *getASTMutationListener() const; |
| 1540 | ExternalSemaSource* getExternalSource() const { return ExternalSource; } |
| 1541 | |
| 1542 | ///Registers an external source. If an external source already exists, |
| 1543 | /// creates a multiplex external source and appends to it. |
| 1544 | /// |
| 1545 | ///\param[in] E - A non-null external sema source. |
| 1546 | /// |
| 1547 | void addExternalSource(ExternalSemaSource *E); |
| 1548 | |
| 1549 | void PrintStats() const; |
| 1550 | |
| 1551 | /// Warn that the stack is nearly exhausted. |
| 1552 | void warnStackExhausted(SourceLocation Loc); |
| 1553 | |
| 1554 | /// Run some code with "sufficient" stack space. (Currently, at least 256K is |
| 1555 | /// guaranteed). Produces a warning if we're low on stack space and allocates |
| 1556 | /// more in that case. Use this in code that may recurse deeply (for example, |
| 1557 | /// in template instantiation) to avoid stack overflow. |
| 1558 | void runWithSufficientStackSpace(SourceLocation Loc, |
| 1559 | llvm::function_ref<void()> Fn); |
| 1560 | |
| 1561 | /// Helper class that creates diagnostics with optional |
| 1562 | /// template instantiation stacks. |
| 1563 | /// |
| 1564 | /// This class provides a wrapper around the basic DiagnosticBuilder |
| 1565 | /// class that emits diagnostics. ImmediateDiagBuilder is |
| 1566 | /// responsible for emitting the diagnostic (as DiagnosticBuilder |
| 1567 | /// does) and, if the diagnostic comes from inside a template |
| 1568 | /// instantiation, printing the template instantiation stack as |
| 1569 | /// well. |
| 1570 | class ImmediateDiagBuilder : public DiagnosticBuilder { |
| 1571 | Sema &SemaRef; |
| 1572 | unsigned DiagID; |
| 1573 | |
| 1574 | public: |
| 1575 | ImmediateDiagBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) |
| 1576 | : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) {} |
| 1577 | ImmediateDiagBuilder(DiagnosticBuilder &&DB, Sema &SemaRef, unsigned DiagID) |
| 1578 | : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) {} |
| 1579 | |
| 1580 | // This is a cunning lie. DiagnosticBuilder actually performs move |
| 1581 | // construction in its copy constructor (but due to varied uses, it's not |
| 1582 | // possible to conveniently express this as actual move construction). So |
| 1583 | // the default copy ctor here is fine, because the base class disables the |
| 1584 | // source anyway, so the user-defined ~ImmediateDiagBuilder is a safe no-op |
| 1585 | // in that case anwyay. |
| 1586 | ImmediateDiagBuilder(const ImmediateDiagBuilder &) = default; |
| 1587 | |
| 1588 | ~ImmediateDiagBuilder() { |
| 1589 | // If we aren't active, there is nothing to do. |
| 1590 | if (!isActive()) return; |
| 1591 | |
| 1592 | // Otherwise, we need to emit the diagnostic. First clear the diagnostic |
| 1593 | // builder itself so it won't emit the diagnostic in its own destructor. |
| 1594 | // |
| 1595 | // This seems wasteful, in that as written the DiagnosticBuilder dtor will |
| 1596 | // do its own needless checks to see if the diagnostic needs to be |
| 1597 | // emitted. However, because we take care to ensure that the builder |
| 1598 | // objects never escape, a sufficiently smart compiler will be able to |
| 1599 | // eliminate that code. |
| 1600 | Clear(); |
| 1601 | |
| 1602 | // Dispatch to Sema to emit the diagnostic. |
| 1603 | SemaRef.EmitCurrentDiagnostic(DiagID); |
| 1604 | } |
| 1605 | |
| 1606 | /// Teach operator<< to produce an object of the correct type. |
| 1607 | template <typename T> |
| 1608 | friend const ImmediateDiagBuilder & |
| 1609 | operator<<(const ImmediateDiagBuilder &Diag, const T &Value) { |
| 1610 | const DiagnosticBuilder &BaseDiag = Diag; |
| 1611 | BaseDiag << Value; |
| 1612 | return Diag; |
| 1613 | } |
| 1614 | |
| 1615 | // It is necessary to limit this to rvalue reference to avoid calling this |
| 1616 | // function with a bitfield lvalue argument since non-const reference to |
| 1617 | // bitfield is not allowed. |
| 1618 | template <typename T, typename = typename std::enable_if< |
| 1619 | !std::is_lvalue_reference<T>::value>::type> |
| 1620 | const ImmediateDiagBuilder &operator<<(T &&V) const { |
| 1621 | const DiagnosticBuilder &BaseDiag = *this; |
| 1622 | BaseDiag << std::move(V); |
| 1623 | return *this; |
| 1624 | } |
| 1625 | }; |
| 1626 | |
| 1627 | /// A generic diagnostic builder for errors which may or may not be deferred. |
| 1628 | /// |
| 1629 | /// In CUDA, there exist constructs (e.g. variable-length arrays, try/catch) |
| 1630 | /// which are not allowed to appear inside __device__ functions and are |
| 1631 | /// allowed to appear in __host__ __device__ functions only if the host+device |
| 1632 | /// function is never codegen'ed. |
| 1633 | /// |
| 1634 | /// To handle this, we use the notion of "deferred diagnostics", where we |
| 1635 | /// attach a diagnostic to a FunctionDecl that's emitted iff it's codegen'ed. |
| 1636 | /// |
| 1637 | /// This class lets you emit either a regular diagnostic, a deferred |
| 1638 | /// diagnostic, or no diagnostic at all, according to an argument you pass to |
| 1639 | /// its constructor, thus simplifying the process of creating these "maybe |
| 1640 | /// deferred" diagnostics. |
| 1641 | class SemaDiagnosticBuilder { |
| 1642 | public: |
| 1643 | enum Kind { |
| 1644 | /// Emit no diagnostics. |
| 1645 | K_Nop, |
| 1646 | /// Emit the diagnostic immediately (i.e., behave like Sema::Diag()). |
| 1647 | K_Immediate, |
| 1648 | /// Emit the diagnostic immediately, and, if it's a warning or error, also |
| 1649 | /// emit a call stack showing how this function can be reached by an a |
| 1650 | /// priori known-emitted function. |
| 1651 | K_ImmediateWithCallStack, |
| 1652 | /// Create a deferred diagnostic, which is emitted only if the function |
| 1653 | /// it's attached to is codegen'ed. Also emit a call stack as with |
| 1654 | /// K_ImmediateWithCallStack. |
| 1655 | K_Deferred |
| 1656 | }; |
| 1657 | |
| 1658 | SemaDiagnosticBuilder(Kind K, SourceLocation Loc, unsigned DiagID, |
| 1659 | FunctionDecl *Fn, Sema &S); |
| 1660 | SemaDiagnosticBuilder(SemaDiagnosticBuilder &&D); |
| 1661 | SemaDiagnosticBuilder(const SemaDiagnosticBuilder &) = default; |
| 1662 | ~SemaDiagnosticBuilder(); |
| 1663 | |
| 1664 | bool isImmediate() const { return ImmediateDiag.hasValue(); } |
| 1665 | |
| 1666 | /// Convertible to bool: True if we immediately emitted an error, false if |
| 1667 | /// we didn't emit an error or we created a deferred error. |
| 1668 | /// |
| 1669 | /// Example usage: |
| 1670 | /// |
| 1671 | /// if (SemaDiagnosticBuilder(...) << foo << bar) |
| 1672 | /// return ExprError(); |
| 1673 | /// |
| 1674 | /// But see CUDADiagIfDeviceCode() and CUDADiagIfHostCode() -- you probably |
| 1675 | /// want to use these instead of creating a SemaDiagnosticBuilder yourself. |
| 1676 | operator bool() const { return isImmediate(); } |
| 1677 | |
| 1678 | template <typename T> |
| 1679 | friend const SemaDiagnosticBuilder & |
| 1680 | operator<<(const SemaDiagnosticBuilder &Diag, const T &Value) { |
| 1681 | if (Diag.ImmediateDiag.hasValue()) |
| 1682 | *Diag.ImmediateDiag << Value; |
| 1683 | else if (Diag.PartialDiagId.hasValue()) |
| 1684 | Diag.S.DeviceDeferredDiags[Diag.Fn][*Diag.PartialDiagId].second |
| 1685 | << Value; |
| 1686 | return Diag; |
| 1687 | } |
| 1688 | |
| 1689 | // It is necessary to limit this to rvalue reference to avoid calling this |
| 1690 | // function with a bitfield lvalue argument since non-const reference to |
| 1691 | // bitfield is not allowed. |
| 1692 | template <typename T, typename = typename std::enable_if< |
| 1693 | !std::is_lvalue_reference<T>::value>::type> |
| 1694 | const SemaDiagnosticBuilder &operator<<(T &&V) const { |
| 1695 | if (ImmediateDiag.hasValue()) |
| 1696 | *ImmediateDiag << std::move(V); |
| 1697 | else if (PartialDiagId.hasValue()) |
| 1698 | S.DeviceDeferredDiags[Fn][*PartialDiagId].second << std::move(V); |
| 1699 | return *this; |
| 1700 | } |
| 1701 | |
| 1702 | friend const SemaDiagnosticBuilder & |
| 1703 | operator<<(const SemaDiagnosticBuilder &Diag, const PartialDiagnostic &PD) { |
| 1704 | if (Diag.ImmediateDiag.hasValue()) |
| 1705 | PD.Emit(*Diag.ImmediateDiag); |
| 1706 | else if (Diag.PartialDiagId.hasValue()) |
| 1707 | Diag.S.DeviceDeferredDiags[Diag.Fn][*Diag.PartialDiagId].second = PD; |
| 1708 | return Diag; |
| 1709 | } |
| 1710 | |
| 1711 | void AddFixItHint(const FixItHint &Hint) const { |
| 1712 | if (ImmediateDiag.hasValue()) |
| 1713 | ImmediateDiag->AddFixItHint(Hint); |
| 1714 | else if (PartialDiagId.hasValue()) |
| 1715 | S.DeviceDeferredDiags[Fn][*PartialDiagId].second.AddFixItHint(Hint); |
| 1716 | } |
| 1717 | |
| 1718 | friend ExprResult ExprError(const SemaDiagnosticBuilder &) { |
| 1719 | return ExprError(); |
| 1720 | } |
| 1721 | friend StmtResult StmtError(const SemaDiagnosticBuilder &) { |
| 1722 | return StmtError(); |
| 1723 | } |
| 1724 | operator ExprResult() const { return ExprError(); } |
| 1725 | operator StmtResult() const { return StmtError(); } |
| 1726 | operator TypeResult() const { return TypeError(); } |
| 1727 | operator DeclResult() const { return DeclResult(true); } |
| 1728 | operator MemInitResult() const { return MemInitResult(true); } |
| 1729 | |
| 1730 | private: |
| 1731 | Sema &S; |
| 1732 | SourceLocation Loc; |
| 1733 | unsigned DiagID; |
| 1734 | FunctionDecl *Fn; |
| 1735 | bool ShowCallStack; |
| 1736 | |
| 1737 | // Invariant: At most one of these Optionals has a value. |
| 1738 | // FIXME: Switch these to a Variant once that exists. |
| 1739 | llvm::Optional<ImmediateDiagBuilder> ImmediateDiag; |
| 1740 | llvm::Optional<unsigned> PartialDiagId; |
| 1741 | }; |
| 1742 | |
| 1743 | /// Is the last error level diagnostic immediate. This is used to determined |
| 1744 | /// whether the next info diagnostic should be immediate. |
| 1745 | bool IsLastErrorImmediate = true; |
| 1746 | |
| 1747 | /// Emit a diagnostic. |
| 1748 | SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID, |
| 1749 | bool DeferHint = false); |
| 1750 | |
| 1751 | /// Emit a partial diagnostic. |
| 1752 | SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic &PD, |
| 1753 | bool DeferHint = false); |
| 1754 | |
| 1755 | /// Build a partial diagnostic. |
| 1756 | PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h |
| 1757 | |
| 1758 | /// Whether uncompilable error has occurred. This includes error happens |
| 1759 | /// in deferred diagnostics. |
| 1760 | bool hasUncompilableErrorOccurred() const; |
| 1761 | |
| 1762 | bool findMacroSpelling(SourceLocation &loc, StringRef name); |
| 1763 | |
| 1764 | /// Get a string to suggest for zero-initialization of a type. |
| 1765 | std::string |
| 1766 | getFixItZeroInitializerForType(QualType T, SourceLocation Loc) const; |
| 1767 | std::string getFixItZeroLiteralForType(QualType T, SourceLocation Loc) const; |
| 1768 | |
| 1769 | /// Calls \c Lexer::getLocForEndOfToken() |
| 1770 | SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0); |
| 1771 | |
| 1772 | /// Retrieve the module loader associated with the preprocessor. |
| 1773 | ModuleLoader &getModuleLoader() const; |
| 1774 | |
| 1775 | /// Invent a new identifier for parameters of abbreviated templates. |
| 1776 | IdentifierInfo * |
| 1777 | InventAbbreviatedTemplateParameterTypeName(IdentifierInfo *ParamName, |
| 1778 | unsigned Index); |
| 1779 | |
| 1780 | void emitAndClearUnusedLocalTypedefWarnings(); |
| 1781 | |
| 1782 | private: |
| 1783 | /// Function or variable declarations to be checked for whether the deferred |
| 1784 | /// diagnostics should be emitted. |
| 1785 | SmallVector<Decl *, 4> DeclsToCheckForDeferredDiags; |
| 1786 | |
| 1787 | public: |
| 1788 | // Emit all deferred diagnostics. |
| 1789 | void emitDeferredDiags(); |
| 1790 | |
| 1791 | enum TUFragmentKind { |
| 1792 | /// The global module fragment, between 'module;' and a module-declaration. |
| 1793 | Global, |
| 1794 | /// A normal translation unit fragment. For a non-module unit, this is the |
| 1795 | /// entire translation unit. Otherwise, it runs from the module-declaration |
| 1796 | /// to the private-module-fragment (if any) or the end of the TU (if not). |
| 1797 | Normal, |
| 1798 | /// The private module fragment, between 'module :private;' and the end of |
| 1799 | /// the translation unit. |
| 1800 | Private |
| 1801 | }; |
| 1802 | |
| 1803 | void ActOnStartOfTranslationUnit(); |
| 1804 | void ActOnEndOfTranslationUnit(); |
| 1805 | void ActOnEndOfTranslationUnitFragment(TUFragmentKind Kind); |
| 1806 | |
| 1807 | void CheckDelegatingCtorCycles(); |
| 1808 | |
| 1809 | Scope *getScopeForContext(DeclContext *Ctx); |
| 1810 | |
| 1811 | void PushFunctionScope(); |
| 1812 | void PushBlockScope(Scope *BlockScope, BlockDecl *Block); |
| 1813 | sema::LambdaScopeInfo *PushLambdaScope(); |
| 1814 | |
| 1815 | /// This is used to inform Sema what the current TemplateParameterDepth |
| 1816 | /// is during Parsing. Currently it is used to pass on the depth |
| 1817 | /// when parsing generic lambda 'auto' parameters. |
| 1818 | void RecordParsingTemplateParameterDepth(unsigned Depth); |
| 1819 | |
| 1820 | void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD, |
| 1821 | RecordDecl *RD, CapturedRegionKind K, |
| 1822 | unsigned OpenMPCaptureLevel = 0); |
| 1823 | |
| 1824 | /// Custom deleter to allow FunctionScopeInfos to be kept alive for a short |
| 1825 | /// time after they've been popped. |
| 1826 | class PoppedFunctionScopeDeleter { |
| 1827 | Sema *Self; |
| 1828 | |
| 1829 | public: |
| 1830 | explicit PoppedFunctionScopeDeleter(Sema *Self) : Self(Self) {} |
| 1831 | void operator()(sema::FunctionScopeInfo *Scope) const; |
| 1832 | }; |
| 1833 | |
| 1834 | using PoppedFunctionScopePtr = |
| 1835 | std::unique_ptr<sema::FunctionScopeInfo, PoppedFunctionScopeDeleter>; |
| 1836 | |
| 1837 | PoppedFunctionScopePtr |
| 1838 | PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP = nullptr, |
| 1839 | const Decl *D = nullptr, |
| 1840 | QualType BlockType = QualType()); |
| 1841 | |
| 1842 | sema::FunctionScopeInfo *getCurFunction() const { |
| 1843 | return FunctionScopes.empty() ? nullptr : FunctionScopes.back(); |
| 1844 | } |
| 1845 | |
| 1846 | sema::FunctionScopeInfo *getEnclosingFunction() const; |
| 1847 | |
| 1848 | void setFunctionHasBranchIntoScope(); |
| 1849 | void setFunctionHasBranchProtectedScope(); |
| 1850 | void setFunctionHasIndirectGoto(); |
| 1851 | |
| 1852 | void PushCompoundScope(bool IsStmtExpr); |
| 1853 | void PopCompoundScope(); |
| 1854 | |
| 1855 | sema::CompoundScopeInfo &getCurCompoundScope() const; |
| 1856 | |
| 1857 | bool hasAnyUnrecoverableErrorsInThisFunction() const; |
| 1858 | |
| 1859 | /// Retrieve the current block, if any. |
| 1860 | sema::BlockScopeInfo *getCurBlock(); |
| 1861 | |
| 1862 | /// Get the innermost lambda enclosing the current location, if any. This |
| 1863 | /// looks through intervening non-lambda scopes such as local functions and |
| 1864 | /// blocks. |
| 1865 | sema::LambdaScopeInfo *getEnclosingLambda() const; |
| 1866 | |
| 1867 | /// Retrieve the current lambda scope info, if any. |
| 1868 | /// \param IgnoreNonLambdaCapturingScope true if should find the top-most |
| 1869 | /// lambda scope info ignoring all inner capturing scopes that are not |
| 1870 | /// lambda scopes. |
| 1871 | sema::LambdaScopeInfo * |
| 1872 | getCurLambda(bool IgnoreNonLambdaCapturingScope = false); |
| 1873 | |
| 1874 | /// Retrieve the current generic lambda info, if any. |
| 1875 | sema::LambdaScopeInfo *getCurGenericLambda(); |
| 1876 | |
| 1877 | /// Retrieve the current captured region, if any. |
| 1878 | sema::CapturedRegionScopeInfo *getCurCapturedRegion(); |
| 1879 | |
| 1880 | /// WeakTopLevelDeclDecls - access to \#pragma weak-generated Decls |
| 1881 | SmallVectorImpl<Decl *> &WeakTopLevelDecls() { return WeakTopLevelDecl; } |
| 1882 | |
| 1883 | /// Called before parsing a function declarator belonging to a function |
| 1884 | /// declaration. |
| 1885 | void ActOnStartFunctionDeclarationDeclarator(Declarator &D, |
| 1886 | unsigned TemplateParameterDepth); |
| 1887 | |
| 1888 | /// Called after parsing a function declarator belonging to a function |
| 1889 | /// declaration. |
| 1890 | void ActOnFinishFunctionDeclarationDeclarator(Declarator &D); |
| 1891 | |
| 1892 | void ActOnComment(SourceRange Comment); |
| 1893 | |
| 1894 | //===--------------------------------------------------------------------===// |
| 1895 | // Type Analysis / Processing: SemaType.cpp. |
| 1896 | // |
| 1897 | |
| 1898 | QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs, |
| 1899 | const DeclSpec *DS = nullptr); |
| 1900 | QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVRA, |
| 1901 | const DeclSpec *DS = nullptr); |
| 1902 | QualType BuildPointerType(QualType T, |
| 1903 | SourceLocation Loc, DeclarationName Entity); |
| 1904 | QualType BuildReferenceType(QualType T, bool LValueRef, |
| 1905 | SourceLocation Loc, DeclarationName Entity); |
| 1906 | QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, |
| 1907 | Expr *ArraySize, unsigned Quals, |
| 1908 | SourceRange Brackets, DeclarationName Entity); |
| 1909 | QualType BuildVectorType(QualType T, Expr *VecSize, SourceLocation AttrLoc); |
| 1910 | QualType BuildExtVectorType(QualType T, Expr *ArraySize, |
| 1911 | SourceLocation AttrLoc); |
| 1912 | QualType BuildMatrixType(QualType T, Expr *NumRows, Expr *NumColumns, |
| 1913 | SourceLocation AttrLoc); |
| 1914 | |
| 1915 | QualType BuildAddressSpaceAttr(QualType &T, LangAS ASIdx, Expr *AddrSpace, |
| 1916 | SourceLocation AttrLoc); |
| 1917 | |
| 1918 | /// Same as above, but constructs the AddressSpace index if not provided. |
| 1919 | QualType BuildAddressSpaceAttr(QualType &T, Expr *AddrSpace, |
| 1920 | SourceLocation AttrLoc); |
| 1921 | |
| 1922 | bool CheckQualifiedFunctionForTypeId(QualType T, SourceLocation Loc); |
| 1923 | |
| 1924 | bool CheckFunctionReturnType(QualType T, SourceLocation Loc); |
| 1925 | |
| 1926 | /// Build a function type. |
| 1927 | /// |
| 1928 | /// This routine checks the function type according to C++ rules and |
| 1929 | /// under the assumption that the result type and parameter types have |
| 1930 | /// just been instantiated from a template. It therefore duplicates |
| 1931 | /// some of the behavior of GetTypeForDeclarator, but in a much |
| 1932 | /// simpler form that is only suitable for this narrow use case. |
| 1933 | /// |
| 1934 | /// \param T The return type of the function. |
| 1935 | /// |
| 1936 | /// \param ParamTypes The parameter types of the function. This array |
| 1937 | /// will be modified to account for adjustments to the types of the |
| 1938 | /// function parameters. |
| 1939 | /// |
| 1940 | /// \param Loc The location of the entity whose type involves this |
| 1941 | /// function type or, if there is no such entity, the location of the |
| 1942 | /// type that will have function type. |
| 1943 | /// |
| 1944 | /// \param Entity The name of the entity that involves the function |
| 1945 | /// type, if known. |
| 1946 | /// |
| 1947 | /// \param EPI Extra information about the function type. Usually this will |
| 1948 | /// be taken from an existing function with the same prototype. |
| 1949 | /// |
| 1950 | /// \returns A suitable function type, if there are no errors. The |
| 1951 | /// unqualified type will always be a FunctionProtoType. |
| 1952 | /// Otherwise, returns a NULL type. |
| 1953 | QualType BuildFunctionType(QualType T, |
| 1954 | MutableArrayRef<QualType> ParamTypes, |
| 1955 | SourceLocation Loc, DeclarationName Entity, |
| 1956 | const FunctionProtoType::ExtProtoInfo &EPI); |
| 1957 | |
| 1958 | QualType BuildMemberPointerType(QualType T, QualType Class, |
| 1959 | SourceLocation Loc, |
| 1960 | DeclarationName Entity); |
| 1961 | QualType BuildBlockPointerType(QualType T, |
| 1962 | SourceLocation Loc, DeclarationName Entity); |
| 1963 | QualType BuildParenType(QualType T); |
| 1964 | QualType BuildAtomicType(QualType T, SourceLocation Loc); |
| 1965 | QualType BuildReadPipeType(QualType T, |
| 1966 | SourceLocation Loc); |
| 1967 | QualType BuildWritePipeType(QualType T, |
| 1968 | SourceLocation Loc); |
| 1969 | QualType BuildExtIntType(bool IsUnsigned, Expr *BitWidth, SourceLocation Loc); |
| 1970 | |
| 1971 | TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); |
| 1972 | TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); |
| 1973 | |
| 1974 | /// Package the given type and TSI into a ParsedType. |
| 1975 | ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); |
| 1976 | DeclarationNameInfo GetNameForDeclarator(Declarator &D); |
| 1977 | DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); |
| 1978 | static QualType GetTypeFromParser(ParsedType Ty, |
| 1979 | TypeSourceInfo **TInfo = nullptr); |
| 1980 | CanThrowResult canThrow(const Stmt *E); |
| 1981 | /// Determine whether the callee of a particular function call can throw. |
| 1982 | /// E, D and Loc are all optional. |
| 1983 | static CanThrowResult canCalleeThrow(Sema &S, const Expr *E, const Decl *D, |
| 1984 | SourceLocation Loc = SourceLocation()); |
| 1985 | const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc, |
| 1986 | const FunctionProtoType *FPT); |
| 1987 | void UpdateExceptionSpec(FunctionDecl *FD, |
| 1988 | const FunctionProtoType::ExceptionSpecInfo &ESI); |
| 1989 | bool CheckSpecifiedExceptionType(QualType &T, SourceRange Range); |
| 1990 | bool CheckDistantExceptionSpec(QualType T); |
| 1991 | bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); |
| 1992 | bool CheckEquivalentExceptionSpec( |
| 1993 | const FunctionProtoType *Old, SourceLocation OldLoc, |
| 1994 | const FunctionProtoType *New, SourceLocation NewLoc); |
| 1995 | bool CheckEquivalentExceptionSpec( |
| 1996 | const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, |
| 1997 | const FunctionProtoType *Old, SourceLocation OldLoc, |
| 1998 | const FunctionProtoType *New, SourceLocation NewLoc); |
| 1999 | bool handlerCanCatch(QualType HandlerType, QualType ExceptionType); |
| 2000 | bool CheckExceptionSpecSubset(const PartialDiagnostic &DiagID, |
| 2001 | const PartialDiagnostic &NestedDiagID, |
| 2002 | const PartialDiagnostic &NoteID, |
| 2003 | const PartialDiagnostic &NoThrowDiagID, |
| 2004 | const FunctionProtoType *Superset, |
| 2005 | SourceLocation SuperLoc, |
| 2006 | const FunctionProtoType *Subset, |
| 2007 | SourceLocation SubLoc); |
| 2008 | bool CheckParamExceptionSpec(const PartialDiagnostic &NestedDiagID, |
| 2009 | const PartialDiagnostic &NoteID, |
| 2010 | const FunctionProtoType *Target, |
| 2011 | SourceLocation TargetLoc, |
| 2012 | const FunctionProtoType *Source, |
| 2013 | SourceLocation SourceLoc); |
| 2014 | |
| 2015 | TypeResult ActOnTypeName(Scope *S, Declarator &D); |
| 2016 | |
| 2017 | /// The parser has parsed the context-sensitive type 'instancetype' |
| 2018 | /// in an Objective-C message declaration. Return the appropriate type. |
| 2019 | ParsedType ActOnObjCInstanceType(SourceLocation Loc); |
| 2020 | |
| 2021 | /// Abstract class used to diagnose incomplete types. |
| 2022 | struct TypeDiagnoser { |
| 2023 | TypeDiagnoser() {} |
| 2024 | |
| 2025 | virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0; |
| 2026 | virtual ~TypeDiagnoser() {} |
| 2027 | }; |
| 2028 | |
| 2029 | static int getPrintable(int I) { return I; } |
| 2030 | static unsigned getPrintable(unsigned I) { return I; } |
| 2031 | static bool getPrintable(bool B) { return B; } |
| 2032 | static const char * getPrintable(const char *S) { return S; } |
| 2033 | static StringRef getPrintable(StringRef S) { return S; } |
| 2034 | static const std::string &getPrintable(const std::string &S) { return S; } |
| 2035 | static const IdentifierInfo *getPrintable(const IdentifierInfo *II) { |
| 2036 | return II; |
| 2037 | } |
| 2038 | static DeclarationName getPrintable(DeclarationName N) { return N; } |
| 2039 | static QualType getPrintable(QualType T) { return T; } |
| 2040 | static SourceRange getPrintable(SourceRange R) { return R; } |
| 2041 | static SourceRange getPrintable(SourceLocation L) { return L; } |
| 2042 | static SourceRange getPrintable(const Expr *E) { return E->getSourceRange(); } |
| 2043 | static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();} |
| 2044 | |
| 2045 | template <typename... Ts> class BoundTypeDiagnoser : public TypeDiagnoser { |
| 2046 | protected: |
| 2047 | unsigned DiagID; |
| 2048 | std::tuple<const Ts &...> Args; |
| 2049 | |
| 2050 | template <std::size_t... Is> |
| 2051 | void emit(const SemaDiagnosticBuilder &DB, |
| 2052 | std::index_sequence<Is...>) const { |
| 2053 | // Apply all tuple elements to the builder in order. |
| 2054 | bool Dummy[] = {false, (DB << getPrintable(std::get<Is>(Args)))...}; |
| 2055 | (void)Dummy; |
| 2056 | } |
| 2057 | |
| 2058 | public: |
| 2059 | BoundTypeDiagnoser(unsigned DiagID, const Ts &...Args) |
| 2060 | : TypeDiagnoser(), DiagID(DiagID), Args(Args...) { |
| 2061 | assert(DiagID != 0 && "no diagnostic for type diagnoser")((DiagID != 0 && "no diagnostic for type diagnoser") ? static_cast<void> (0) : __assert_fail ("DiagID != 0 && \"no diagnostic for type diagnoser\"" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2061, __PRETTY_FUNCTION__)); |
| 2062 | } |
| 2063 | |
| 2064 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { |
| 2065 | const SemaDiagnosticBuilder &DB = S.Diag(Loc, DiagID); |
| 2066 | emit(DB, std::index_sequence_for<Ts...>()); |
| 2067 | DB << T; |
| 2068 | } |
| 2069 | }; |
| 2070 | |
| 2071 | /// Do a check to make sure \p Name looks like a legal argument for the |
| 2072 | /// swift_name attribute applied to decl \p D. Raise a diagnostic if the name |
| 2073 | /// is invalid for the given declaration. |
| 2074 | /// |
| 2075 | /// \p AL is used to provide caret diagnostics in case of a malformed name. |
| 2076 | /// |
| 2077 | /// \returns true if the name is a valid swift name for \p D, false otherwise. |
| 2078 | bool DiagnoseSwiftName(Decl *D, StringRef Name, SourceLocation Loc, |
| 2079 | const ParsedAttr &AL, bool IsAsync); |
| 2080 | |
| 2081 | /// A derivative of BoundTypeDiagnoser for which the diagnostic's type |
| 2082 | /// parameter is preceded by a 0/1 enum that is 1 if the type is sizeless. |
| 2083 | /// For example, a diagnostic with no other parameters would generally have |
| 2084 | /// the form "...%select{incomplete|sizeless}0 type %1...". |
| 2085 | template <typename... Ts> |
| 2086 | class SizelessTypeDiagnoser : public BoundTypeDiagnoser<Ts...> { |
| 2087 | public: |
| 2088 | SizelessTypeDiagnoser(unsigned DiagID, const Ts &... Args) |
| 2089 | : BoundTypeDiagnoser<Ts...>(DiagID, Args...) {} |
| 2090 | |
| 2091 | void diagnose(Sema &S, SourceLocation Loc, QualType T) override { |
| 2092 | const SemaDiagnosticBuilder &DB = S.Diag(Loc, this->DiagID); |
| 2093 | this->emit(DB, std::index_sequence_for<Ts...>()); |
| 2094 | DB << T->isSizelessType() << T; |
| 2095 | } |
| 2096 | }; |
| 2097 | |
| 2098 | enum class CompleteTypeKind { |
| 2099 | /// Apply the normal rules for complete types. In particular, |
| 2100 | /// treat all sizeless types as incomplete. |
| 2101 | Normal, |
| 2102 | |
| 2103 | /// Relax the normal rules for complete types so that they include |
| 2104 | /// sizeless built-in types. |
| 2105 | AcceptSizeless, |
| 2106 | |
| 2107 | // FIXME: Eventually we should flip the default to Normal and opt in |
| 2108 | // to AcceptSizeless rather than opt out of it. |
| 2109 | Default = AcceptSizeless |
| 2110 | }; |
| 2111 | |
| 2112 | private: |
| 2113 | /// Methods for marking which expressions involve dereferencing a pointer |
| 2114 | /// marked with the 'noderef' attribute. Expressions are checked bottom up as |
| 2115 | /// they are parsed, meaning that a noderef pointer may not be accessed. For |
| 2116 | /// example, in `&*p` where `p` is a noderef pointer, we will first parse the |
| 2117 | /// `*p`, but need to check that `address of` is called on it. This requires |
| 2118 | /// keeping a container of all pending expressions and checking if the address |
| 2119 | /// of them are eventually taken. |
| 2120 | void CheckSubscriptAccessOfNoDeref(const ArraySubscriptExpr *E); |
| 2121 | void CheckAddressOfNoDeref(const Expr *E); |
| 2122 | void CheckMemberAccessOfNoDeref(const MemberExpr *E); |
| 2123 | |
| 2124 | bool RequireCompleteTypeImpl(SourceLocation Loc, QualType T, |
| 2125 | CompleteTypeKind Kind, TypeDiagnoser *Diagnoser); |
| 2126 | |
| 2127 | struct ModuleScope { |
| 2128 | SourceLocation BeginLoc; |
| 2129 | clang::Module *Module = nullptr; |
| 2130 | bool ModuleInterface = false; |
| 2131 | bool ImplicitGlobalModuleFragment = false; |
| 2132 | VisibleModuleSet OuterVisibleModules; |
| 2133 | }; |
| 2134 | /// The modules we're currently parsing. |
| 2135 | llvm::SmallVector<ModuleScope, 16> ModuleScopes; |
| 2136 | |
| 2137 | /// Namespace definitions that we will export when they finish. |
| 2138 | llvm::SmallPtrSet<const NamespaceDecl*, 8> DeferredExportedNamespaces; |
| 2139 | |
| 2140 | /// Get the module whose scope we are currently within. |
| 2141 | Module *getCurrentModule() const { |
| 2142 | return ModuleScopes.empty() ? nullptr : ModuleScopes.back().Module; |
| 2143 | } |
| 2144 | |
| 2145 | VisibleModuleSet VisibleModules; |
| 2146 | |
| 2147 | public: |
| 2148 | /// Get the module owning an entity. |
| 2149 | Module *getOwningModule(const Decl *Entity) { |
| 2150 | return Entity->getOwningModule(); |
| 2151 | } |
| 2152 | |
| 2153 | /// Make a merged definition of an existing hidden definition \p ND |
| 2154 | /// visible at the specified location. |
| 2155 | void makeMergedDefinitionVisible(NamedDecl *ND); |
| 2156 | |
| 2157 | bool isModuleVisible(const Module *M, bool ModulePrivate = false); |
| 2158 | |
| 2159 | // When loading a non-modular PCH files, this is used to restore module |
| 2160 | // visibility. |
| 2161 | void makeModuleVisible(Module *Mod, SourceLocation ImportLoc) { |
| 2162 | VisibleModules.setVisible(Mod, ImportLoc); |
| 2163 | } |
| 2164 | |
| 2165 | /// Determine whether a declaration is visible to name lookup. |
| 2166 | bool isVisible(const NamedDecl *D) { |
| 2167 | return D->isUnconditionallyVisible() || isVisibleSlow(D); |
| 2168 | } |
| 2169 | |
| 2170 | /// Determine whether any declaration of an entity is visible. |
| 2171 | bool |
| 2172 | hasVisibleDeclaration(const NamedDecl *D, |
| 2173 | llvm::SmallVectorImpl<Module *> *Modules = nullptr) { |
| 2174 | return isVisible(D) || hasVisibleDeclarationSlow(D, Modules); |
| 2175 | } |
| 2176 | bool hasVisibleDeclarationSlow(const NamedDecl *D, |
| 2177 | llvm::SmallVectorImpl<Module *> *Modules); |
| 2178 | |
| 2179 | bool hasVisibleMergedDefinition(NamedDecl *Def); |
| 2180 | bool hasMergedDefinitionInCurrentModule(NamedDecl *Def); |
| 2181 | |
| 2182 | /// Determine if \p D and \p Suggested have a structurally compatible |
| 2183 | /// layout as described in C11 6.2.7/1. |
| 2184 | bool hasStructuralCompatLayout(Decl *D, Decl *Suggested); |
| 2185 | |
| 2186 | /// Determine if \p D has a visible definition. If not, suggest a declaration |
| 2187 | /// that should be made visible to expose the definition. |
| 2188 | bool hasVisibleDefinition(NamedDecl *D, NamedDecl **Suggested, |
| 2189 | bool OnlyNeedComplete = false); |
| 2190 | bool hasVisibleDefinition(const NamedDecl *D) { |
| 2191 | NamedDecl *Hidden; |
| 2192 | return hasVisibleDefinition(const_cast<NamedDecl*>(D), &Hidden); |
| 2193 | } |
| 2194 | |
| 2195 | /// Determine if the template parameter \p D has a visible default argument. |
| 2196 | bool |
| 2197 | hasVisibleDefaultArgument(const NamedDecl *D, |
| 2198 | llvm::SmallVectorImpl<Module *> *Modules = nullptr); |
| 2199 | |
| 2200 | /// Determine if there is a visible declaration of \p D that is an explicit |
| 2201 | /// specialization declaration for a specialization of a template. (For a |
| 2202 | /// member specialization, use hasVisibleMemberSpecialization.) |
| 2203 | bool hasVisibleExplicitSpecialization( |
| 2204 | const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr); |
| 2205 | |
| 2206 | /// Determine if there is a visible declaration of \p D that is a member |
| 2207 | /// specialization declaration (as opposed to an instantiated declaration). |
| 2208 | bool hasVisibleMemberSpecialization( |
| 2209 | const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr); |
| 2210 | |
| 2211 | /// Determine if \p A and \p B are equivalent internal linkage declarations |
| 2212 | /// from different modules, and thus an ambiguity error can be downgraded to |
| 2213 | /// an extension warning. |
| 2214 | bool isEquivalentInternalLinkageDeclaration(const NamedDecl *A, |
| 2215 | const NamedDecl *B); |
| 2216 | void diagnoseEquivalentInternalLinkageDeclarations( |
| 2217 | SourceLocation Loc, const NamedDecl *D, |
| 2218 | ArrayRef<const NamedDecl *> Equiv); |
| 2219 | |
| 2220 | bool isUsualDeallocationFunction(const CXXMethodDecl *FD); |
| 2221 | |
| 2222 | bool isCompleteType(SourceLocation Loc, QualType T, |
| 2223 | CompleteTypeKind Kind = CompleteTypeKind::Default) { |
| 2224 | return !RequireCompleteTypeImpl(Loc, T, Kind, nullptr); |
| 2225 | } |
| 2226 | bool RequireCompleteType(SourceLocation Loc, QualType T, |
| 2227 | CompleteTypeKind Kind, TypeDiagnoser &Diagnoser); |
| 2228 | bool RequireCompleteType(SourceLocation Loc, QualType T, |
| 2229 | CompleteTypeKind Kind, unsigned DiagID); |
| 2230 | |
| 2231 | bool RequireCompleteType(SourceLocation Loc, QualType T, |
| 2232 | TypeDiagnoser &Diagnoser) { |
| 2233 | return RequireCompleteType(Loc, T, CompleteTypeKind::Default, Diagnoser); |
| 2234 | } |
| 2235 | bool RequireCompleteType(SourceLocation Loc, QualType T, unsigned DiagID) { |
| 2236 | return RequireCompleteType(Loc, T, CompleteTypeKind::Default, DiagID); |
| 2237 | } |
| 2238 | |
| 2239 | template <typename... Ts> |
| 2240 | bool RequireCompleteType(SourceLocation Loc, QualType T, unsigned DiagID, |
| 2241 | const Ts &...Args) { |
| 2242 | BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...); |
| 2243 | return RequireCompleteType(Loc, T, Diagnoser); |
| 2244 | } |
| 2245 | |
| 2246 | template <typename... Ts> |
| 2247 | bool RequireCompleteSizedType(SourceLocation Loc, QualType T, unsigned DiagID, |
| 2248 | const Ts &... Args) { |
| 2249 | SizelessTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...); |
| 2250 | return RequireCompleteType(Loc, T, CompleteTypeKind::Normal, Diagnoser); |
| 2251 | } |
| 2252 | |
| 2253 | /// Get the type of expression E, triggering instantiation to complete the |
| 2254 | /// type if necessary -- that is, if the expression refers to a templated |
| 2255 | /// static data member of incomplete array type. |
| 2256 | /// |
| 2257 | /// May still return an incomplete type if instantiation was not possible or |
| 2258 | /// if the type is incomplete for a different reason. Use |
| 2259 | /// RequireCompleteExprType instead if a diagnostic is expected for an |
| 2260 | /// incomplete expression type. |
| 2261 | QualType getCompletedType(Expr *E); |
| 2262 | |
| 2263 | void completeExprArrayBound(Expr *E); |
| 2264 | bool RequireCompleteExprType(Expr *E, CompleteTypeKind Kind, |
| 2265 | TypeDiagnoser &Diagnoser); |
| 2266 | bool RequireCompleteExprType(Expr *E, unsigned DiagID); |
| 2267 | |
| 2268 | template <typename... Ts> |
| 2269 | bool RequireCompleteExprType(Expr *E, unsigned DiagID, const Ts &...Args) { |
| 2270 | BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...); |
| 2271 | return RequireCompleteExprType(E, CompleteTypeKind::Default, Diagnoser); |
| 2272 | } |
| 2273 | |
| 2274 | template <typename... Ts> |
| 2275 | bool RequireCompleteSizedExprType(Expr *E, unsigned DiagID, |
| 2276 | const Ts &... Args) { |
| 2277 | SizelessTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...); |
| 2278 | return RequireCompleteExprType(E, CompleteTypeKind::Normal, Diagnoser); |
| 2279 | } |
| 2280 | |
| 2281 | bool RequireLiteralType(SourceLocation Loc, QualType T, |
| 2282 | TypeDiagnoser &Diagnoser); |
| 2283 | bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID); |
| 2284 | |
| 2285 | template <typename... Ts> |
| 2286 | bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID, |
| 2287 | const Ts &...Args) { |
| 2288 | BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...); |
| 2289 | return RequireLiteralType(Loc, T, Diagnoser); |
| 2290 | } |
| 2291 | |
| 2292 | QualType getElaboratedType(ElaboratedTypeKeyword Keyword, |
| 2293 | const CXXScopeSpec &SS, QualType T, |
| 2294 | TagDecl *OwnedTagDecl = nullptr); |
| 2295 | |
| 2296 | QualType getDecltypeForParenthesizedExpr(Expr *E); |
| 2297 | QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); |
| 2298 | /// If AsUnevaluated is false, E is treated as though it were an evaluated |
| 2299 | /// context, such as when building a type for decltype(auto). |
| 2300 | QualType BuildDecltypeType(Expr *E, SourceLocation Loc, |
| 2301 | bool AsUnevaluated = true); |
| 2302 | QualType BuildUnaryTransformType(QualType BaseType, |
| 2303 | UnaryTransformType::UTTKind UKind, |
| 2304 | SourceLocation Loc); |
| 2305 | |
| 2306 | //===--------------------------------------------------------------------===// |
| 2307 | // Symbol table / Decl tracking callbacks: SemaDecl.cpp. |
| 2308 | // |
| 2309 | |
| 2310 | struct SkipBodyInfo { |
| 2311 | SkipBodyInfo() |
| 2312 | : ShouldSkip(false), CheckSameAsPrevious(false), Previous(nullptr), |
| 2313 | New(nullptr) {} |
| 2314 | bool ShouldSkip; |
| 2315 | bool CheckSameAsPrevious; |
| 2316 | NamedDecl *Previous; |
| 2317 | NamedDecl *New; |
| 2318 | }; |
| 2319 | |
| 2320 | DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = nullptr); |
| 2321 | |
| 2322 | void DiagnoseUseOfUnimplementedSelectors(); |
| 2323 | |
| 2324 | bool isSimpleTypeSpecifier(tok::TokenKind Kind) const; |
| 2325 | |
| 2326 | ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, |
| 2327 | Scope *S, CXXScopeSpec *SS = nullptr, |
| 2328 | bool isClassName = false, bool HasTrailingDot = false, |
| 2329 | ParsedType ObjectType = nullptr, |
| 2330 | bool IsCtorOrDtorName = false, |
| 2331 | bool WantNontrivialTypeSourceInfo = false, |
| 2332 | bool IsClassTemplateDeductionContext = true, |
| 2333 | IdentifierInfo **CorrectedII = nullptr); |
| 2334 | TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); |
| 2335 | bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); |
| 2336 | void DiagnoseUnknownTypeName(IdentifierInfo *&II, |
| 2337 | SourceLocation IILoc, |
| 2338 | Scope *S, |
| 2339 | CXXScopeSpec *SS, |
| 2340 | ParsedType &SuggestedType, |
| 2341 | bool IsTemplateName = false); |
| 2342 | |
| 2343 | /// Attempt to behave like MSVC in situations where lookup of an unqualified |
| 2344 | /// type name has failed in a dependent context. In these situations, we |
| 2345 | /// automatically form a DependentTypeName that will retry lookup in a related |
| 2346 | /// scope during instantiation. |
| 2347 | ParsedType ActOnMSVCUnknownTypeName(const IdentifierInfo &II, |
| 2348 | SourceLocation NameLoc, |
| 2349 | bool IsTemplateTypeArg); |
| 2350 | |
| 2351 | /// Describes the result of the name lookup and resolution performed |
| 2352 | /// by \c ClassifyName(). |
| 2353 | enum NameClassificationKind { |
| 2354 | /// This name is not a type or template in this context, but might be |
| 2355 | /// something else. |
| 2356 | NC_Unknown, |
| 2357 | /// Classification failed; an error has been produced. |
| 2358 | NC_Error, |
| 2359 | /// The name has been typo-corrected to a keyword. |
| 2360 | NC_Keyword, |
| 2361 | /// The name was classified as a type. |
| 2362 | NC_Type, |
| 2363 | /// The name was classified as a specific non-type, non-template |
| 2364 | /// declaration. ActOnNameClassifiedAsNonType should be called to |
| 2365 | /// convert the declaration to an expression. |
| 2366 | NC_NonType, |
| 2367 | /// The name was classified as an ADL-only function name. |
| 2368 | /// ActOnNameClassifiedAsUndeclaredNonType should be called to convert the |
| 2369 | /// result to an expression. |
| 2370 | NC_UndeclaredNonType, |
| 2371 | /// The name denotes a member of a dependent type that could not be |
| 2372 | /// resolved. ActOnNameClassifiedAsDependentNonType should be called to |
| 2373 | /// convert the result to an expression. |
| 2374 | NC_DependentNonType, |
| 2375 | /// The name was classified as an overload set, and an expression |
| 2376 | /// representing that overload set has been formed. |
| 2377 | /// ActOnNameClassifiedAsOverloadSet should be called to form a suitable |
| 2378 | /// expression referencing the overload set. |
| 2379 | NC_OverloadSet, |
| 2380 | /// The name was classified as a template whose specializations are types. |
| 2381 | NC_TypeTemplate, |
| 2382 | /// The name was classified as a variable template name. |
| 2383 | NC_VarTemplate, |
| 2384 | /// The name was classified as a function template name. |
| 2385 | NC_FunctionTemplate, |
| 2386 | /// The name was classified as an ADL-only function template name. |
| 2387 | NC_UndeclaredTemplate, |
| 2388 | /// The name was classified as a concept name. |
| 2389 | NC_Concept, |
| 2390 | }; |
| 2391 | |
| 2392 | class NameClassification { |
| 2393 | NameClassificationKind Kind; |
| 2394 | union { |
| 2395 | ExprResult Expr; |
| 2396 | NamedDecl *NonTypeDecl; |
| 2397 | TemplateName Template; |
| 2398 | ParsedType Type; |
| 2399 | }; |
| 2400 | |
| 2401 | explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} |
| 2402 | |
| 2403 | public: |
| 2404 | NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} |
| 2405 | |
| 2406 | NameClassification(const IdentifierInfo *Keyword) : Kind(NC_Keyword) {} |
| 2407 | |
| 2408 | static NameClassification Error() { |
| 2409 | return NameClassification(NC_Error); |
| 2410 | } |
| 2411 | |
| 2412 | static NameClassification Unknown() { |
| 2413 | return NameClassification(NC_Unknown); |
| 2414 | } |
| 2415 | |
| 2416 | static NameClassification OverloadSet(ExprResult E) { |
| 2417 | NameClassification Result(NC_OverloadSet); |
| 2418 | Result.Expr = E; |
| 2419 | return Result; |
| 2420 | } |
| 2421 | |
| 2422 | static NameClassification NonType(NamedDecl *D) { |
| 2423 | NameClassification Result(NC_NonType); |
| 2424 | Result.NonTypeDecl = D; |
| 2425 | return Result; |
| 2426 | } |
| 2427 | |
| 2428 | static NameClassification UndeclaredNonType() { |
| 2429 | return NameClassification(NC_UndeclaredNonType); |
| 2430 | } |
| 2431 | |
| 2432 | static NameClassification DependentNonType() { |
| 2433 | return NameClassification(NC_DependentNonType); |
| 2434 | } |
| 2435 | |
| 2436 | static NameClassification TypeTemplate(TemplateName Name) { |
| 2437 | NameClassification Result(NC_TypeTemplate); |
| 2438 | Result.Template = Name; |
| 2439 | return Result; |
| 2440 | } |
| 2441 | |
| 2442 | static NameClassification VarTemplate(TemplateName Name) { |
| 2443 | NameClassification Result(NC_VarTemplate); |
| 2444 | Result.Template = Name; |
| 2445 | return Result; |
| 2446 | } |
| 2447 | |
| 2448 | static NameClassification FunctionTemplate(TemplateName Name) { |
| 2449 | NameClassification Result(NC_FunctionTemplate); |
| 2450 | Result.Template = Name; |
| 2451 | return Result; |
| 2452 | } |
| 2453 | |
| 2454 | static NameClassification Concept(TemplateName Name) { |
| 2455 | NameClassification Result(NC_Concept); |
| 2456 | Result.Template = Name; |
| 2457 | return Result; |
| 2458 | } |
| 2459 | |
| 2460 | static NameClassification UndeclaredTemplate(TemplateName Name) { |
| 2461 | NameClassification Result(NC_UndeclaredTemplate); |
| 2462 | Result.Template = Name; |
| 2463 | return Result; |
| 2464 | } |
| 2465 | |
| 2466 | NameClassificationKind getKind() const { return Kind; } |
| 2467 | |
| 2468 | ExprResult getExpression() const { |
| 2469 | assert(Kind == NC_OverloadSet)((Kind == NC_OverloadSet) ? static_cast<void> (0) : __assert_fail ("Kind == NC_OverloadSet", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2469, __PRETTY_FUNCTION__)); |
| 2470 | return Expr; |
| 2471 | } |
| 2472 | |
| 2473 | ParsedType getType() const { |
| 2474 | assert(Kind == NC_Type)((Kind == NC_Type) ? static_cast<void> (0) : __assert_fail ("Kind == NC_Type", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2474, __PRETTY_FUNCTION__)); |
| 2475 | return Type; |
| 2476 | } |
| 2477 | |
| 2478 | NamedDecl *getNonTypeDecl() const { |
| 2479 | assert(Kind == NC_NonType)((Kind == NC_NonType) ? static_cast<void> (0) : __assert_fail ("Kind == NC_NonType", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2479, __PRETTY_FUNCTION__)); |
| 2480 | return NonTypeDecl; |
| 2481 | } |
| 2482 | |
| 2483 | TemplateName getTemplateName() const { |
| 2484 | assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate ||((Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate ) ? static_cast<void> (0) : __assert_fail ("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2486, __PRETTY_FUNCTION__)) |
| 2485 | Kind == NC_VarTemplate || Kind == NC_Concept ||((Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate ) ? static_cast<void> (0) : __assert_fail ("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2486, __PRETTY_FUNCTION__)) |
| 2486 | Kind == NC_UndeclaredTemplate)((Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate ) ? static_cast<void> (0) : __assert_fail ("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate || Kind == NC_Concept || Kind == NC_UndeclaredTemplate" , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2486, __PRETTY_FUNCTION__)); |
| 2487 | return Template; |
| 2488 | } |
| 2489 | |
| 2490 | TemplateNameKind getTemplateNameKind() const { |
| 2491 | switch (Kind) { |
| 2492 | case NC_TypeTemplate: |
| 2493 | return TNK_Type_template; |
| 2494 | case NC_FunctionTemplate: |
| 2495 | return TNK_Function_template; |
| 2496 | case NC_VarTemplate: |
| 2497 | return TNK_Var_template; |
| 2498 | case NC_Concept: |
| 2499 | return TNK_Concept_template; |
| 2500 | case NC_UndeclaredTemplate: |
| 2501 | return TNK_Undeclared_template; |
| 2502 | default: |
| 2503 | llvm_unreachable("unsupported name classification.")::llvm::llvm_unreachable_internal("unsupported name classification." , "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/clang/include/clang/Sema/Sema.h" , 2503); |
| 2504 | } |
| 2505 | } |
| 2506 | }; |
| 2507 | |
| 2508 | /// Perform name lookup on the given name, classifying it based on |
| 2509 | /// the results of name lookup and the following token. |
| 2510 | /// |
| 2511 | /// This routine is used by the parser to resolve identifiers and help direct |
| 2512 | /// parsing. When the identifier cannot be found, this routine will attempt |
| 2513 | /// to correct the typo and classify based on the resulting name. |
| 2514 | /// |
| 2515 | /// \param S The scope in which we're performing name lookup. |
| 2516 | /// |
| 2517 | /// \param SS The nested-name-specifier that precedes the name. |
| 2518 | /// |
| 2519 | /// \param Name The identifier. If typo correction finds an alternative name, |
| 2520 | /// this pointer parameter will be updated accordingly. |
| 2521 | /// |
| 2522 | /// \param NameLoc The location of the identifier. |
| 2523 | /// |
| 2524 | /// \param NextToken The token following the identifier. Used to help |
| 2525 | /// disambiguate the name. |
| 2526 | /// |
| 2527 | /// \param CCC The correction callback, if typo correction is desired. |
| 2528 | NameClassification ClassifyName(Scope *S, CXXScopeSpec &SS, |
| 2529 | IdentifierInfo *&Name, SourceLocation NameLoc, |
| 2530 | const Token &NextToken, |
| 2531 | CorrectionCandidateCallback *CCC = nullptr); |
| 2532 | |
| 2533 | /// Act on the result of classifying a name as an undeclared (ADL-only) |
| 2534 | /// non-type declaration. |
| 2535 | ExprResult ActOnNameClassifiedAsUndeclaredNonType(IdentifierInfo *Name, |
| 2536 | SourceLocation NameLoc); |
| 2537 | /// Act on the result of classifying a name as an undeclared member of a |
| 2538 | /// dependent base class. |
| 2539 | ExprResult ActOnNameClassifiedAsDependentNonType(const CXXScopeSpec &SS, |
| 2540 | IdentifierInfo *Name, |
| 2541 | SourceLocation NameLoc, |
| 2542 | bool IsAddressOfOperand); |
| 2543 | /// Act on the result of classifying a name as a specific non-type |
| 2544 | /// declaration. |
| 2545 | ExprResult ActOnNameClassifiedAsNonType(Scope *S, const CXXScopeSpec &SS, |
| 2546 | NamedDecl *Found, |
| 2547 | SourceLocation NameLoc, |
| 2548 | const Token &NextToken); |
| 2549 | /// Act on the result of classifying a name as an overload set. |
| 2550 | ExprResult ActOnNameClassifiedAsOverloadSet(Scope *S, Expr *OverloadSet); |
| 2551 | |
| 2552 | /// Describes the detailed kind of a template name. Used in diagnostics. |
| 2553 | enum class TemplateNameKindForDiagnostics { |
| 2554 | ClassTemplate, |
| 2555 | FunctionTemplate, |
| 2556 | VarTemplate, |
| 2557 | AliasTemplate, |
| 2558 | TemplateTemplateParam, |
| 2559 | Concept, |
| 2560 | DependentTemplate |
| 2561 | }; |
| 2562 | TemplateNameKindForDiagnostics |
| 2563 | getTemplateNameKindForDiagnostics(TemplateName Name); |
| 2564 | |
| 2565 | /// Determine whether it's plausible that E was intended to be a |
| 2566 | /// template-name. |
| 2567 | bool mightBeIntendedToBeTemplateName(ExprResult E, bool &Dependent) { |
| 2568 | if (!getLangOpts().CPlusPlus || E.isInvalid()) |
| 2569 | return false; |
| 2570 | Dependent = false; |
| 2571 | if (auto *DRE = dyn_cast<DeclRefExpr>(E.get())) |
| 2572 | return !DRE->hasExplicitTemplateArgs(); |
| 2573 | if (auto *ME = dyn_cast<MemberExpr>(E.get())) |
| 2574 | return !ME->hasExplicitTemplateArgs(); |
| 2575 | Dependent = true; |
| 2576 | if (auto *DSDRE = dyn_cast<DependentScopeDeclRefExpr>(E.get())) |
| 2577 | return !DSDRE->hasExplicitTemplateArgs(); |
| 2578 | if (auto *DSME = dyn_cast<CXXDependentScopeMemberExpr>(E.get())) |
| 2579 | return !DSME->hasExplicitTemplateArgs(); |
| 2580 | // Any additional cases recognized here should also be handled by |
| 2581 | // diagnoseExprIntendedAsTemplateName. |
| 2582 | return false; |
| 2583 | } |
| 2584 | void diagnoseExprIntendedAsTemplateName(Scope *S, ExprResult TemplateName, |
| 2585 | SourceLocation Less, |
| 2586 | SourceLocation Greater); |
| 2587 | |
| 2588 | Decl *ActOnDeclarator(Scope *S, Declarator &D); |
| 2589 | |
| 2590 | NamedDecl *HandleDeclarator(Scope *S, Declarator &D, |
| 2591 | MultiTemplateParamsArg TemplateParameterLists); |
| 2592 | void RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S); |
| 2593 | bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); |
| 2594 | bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, |
| 2595 | DeclarationName Name, SourceLocation Loc, |
| 2596 | bool IsTemplateId); |
| 2597 | void |
| 2598 | diagnoseIgnoredQualifiers(unsigned DiagID, unsigned Quals, |
| 2599 | SourceLocation FallbackLoc, |
| 2600 | SourceLocation ConstQualLoc = SourceLocation(), |
| 2601 | SourceLocation VolatileQualLoc = SourceLocation(), |
| 2602 | SourceLocation RestrictQualLoc = SourceLocation(), |
| 2603 | SourceLocation AtomicQualLoc = SourceLocation(), |
| 2604 | SourceLocation UnalignedQualLoc = SourceLocation()); |
| 2605 | |
| 2606 | static bool adjustContextForLocalExternDecl(DeclContext *&DC); |
| 2607 | void DiagnoseFunctionSpecifiers(const DeclSpec &DS); |
| 2608 | NamedDecl *getShadowedDeclaration(const TypedefNameDecl *D, |
| 2609 | const LookupResult &R); |
| 2610 | NamedDecl *getShadowedDeclaration(const VarDecl *D, const LookupResult &R); |
| 2611 | NamedDecl *getShadowedDeclaration(const BindingDecl *D, |
| 2612 | const LookupResult &R); |
| 2613 | void CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl, |
| 2614 | const LookupResult &R); |
| 2615 | void CheckShadow(Scope *S, VarDecl *D); |
| 2616 | |
| 2617 | /// Warn if 'E', which is an expression that is about to be modified, refers |
| 2618 | /// to a shadowing declaration. |
| 2619 | void CheckShadowingDeclModification(Expr *E, SourceLocation Loc); |
| 2620 | |
| 2621 | void DiagnoseShadowingLambdaDecls(const sema::LambdaScopeInfo *LSI); |
| 2622 | |
| 2623 | private: |
| 2624 | /// Map of current shadowing declarations to shadowed declarations. Warn if |
| 2625 | /// it looks like the user is trying to modify the shadowing declaration. |
| 2626 | llvm::DenseMap<const NamedDecl *, const NamedDecl *> ShadowingDecls; |
| 2627 | |
| 2628 | public: |
| 2629 | void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); |
| 2630 | void handleTagNumbering(const TagDecl *Tag, Scope *TagScope); |
| 2631 | void setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec, |
| 2632 | TypedefNameDecl *NewTD); |
| 2633 | void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); |
| 2634 | NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
| 2635 | TypeSourceInfo *TInfo, |
| 2636 | LookupResult &Previous); |
| 2637 | NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, |
| 2638 | LookupResult &Previous, bool &Redeclaration); |
| 2639 | NamedDecl *ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC, |
| 2640 | TypeSourceInfo *TInfo, |
| 2641 | LookupResult &Previous, |
| 2642 | MultiTemplateParamsArg TemplateParamLists, |
| 2643 | bool &AddToScope, |
| 2644 | ArrayRef<BindingDecl *> Bindings = None); |
| 2645 | NamedDecl * |
| 2646 | ActOnDecompositionDeclarator(Scope *S, Declarator &D, |
| 2647 | MultiTemplateParamsArg TemplateParamLists); |
| 2648 | // Returns true if the variable declaration is a redeclaration |
| 2649 | bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); |
| 2650 | void CheckVariableDeclarationType(VarDecl *NewVD); |
| 2651 | bool DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit, |
| 2652 | Expr *Init); |
| 2653 | void CheckCompleteVariableDeclaration(VarDecl *VD); |
| 2654 | void CheckCompleteDecompositionDeclaration(DecompositionDecl *DD); |
| 2655 | void MaybeSuggestAddingStaticToDecl(const FunctionDecl *D); |
| 2656 | |
| 2657 | NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
| 2658 | TypeSourceInfo *TInfo, |
| 2659 | LookupResult &Previous, |
| 2660 | MultiTemplateParamsArg TemplateParamLists, |
| 2661 | bool &AddToScope); |
| 2662 | bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); |
| 2663 | |
| 2664 | enum class CheckConstexprKind { |
| 2665 | /// Diagnose issues that are non-constant or that are extensions. |
| 2666 | Diagnose, |
| 2667 | /// Identify whether this function satisfies the formal rules for constexpr |
| 2668 | /// functions in the current lanugage mode (with no extensions). |
| 2669 | CheckValid |
| 2670 | }; |
| 2671 | |
| 2672 | bool CheckConstexprFunctionDefinition(const FunctionDecl *FD, |
| 2673 | CheckConstexprKind Kind); |
| 2674 | |
| 2675 | void DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD); |
| 2676 | void FindHiddenVirtualMethods(CXXMethodDecl *MD, |
| 2677 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods); |
| 2678 | void NoteHiddenVirtualMethods(CXXMethodDecl *MD, |
| 2679 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods); |
| 2680 | // Returns true if the function declaration is a redeclaration |
| 2681 | bool CheckFunctionDeclaration(Scope *S, |
| 2682 | FunctionDecl *NewFD, LookupResult &Previous, |
| 2683 | bool IsMemberSpecialization); |
| 2684 | bool shouldLinkDependentDeclWithPrevious(Decl *D, Decl *OldDecl); |
| 2685 | bool canFullyTypeCheckRedeclaration(ValueDecl *NewD, ValueDecl *OldD, |
| 2686 | QualType NewT, QualType OldT); |
| 2687 | void CheckMain(FunctionDecl *FD, const DeclSpec &D); |
| 2688 | void CheckMSVCRTEntryPoint(FunctionDecl *FD); |
| 2689 | Attr *getImplicitCodeSegOrSectionAttrForFunction(const FunctionDecl *FD, |
| 2690 | bool IsDefinition); |
| 2691 | void CheckFunctionOrTemplateParamDeclarator(Scope *S, Declarator &D); |
| 2692 | Decl *ActOnParamDeclarator(Scope *S, Declarator &D); |
| 2693 | ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, |
| 2694 | SourceLocation Loc, |
| 2695 | QualType T); |
| 2696 | ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, |
| 2697 | SourceLocation NameLoc, IdentifierInfo *Name, |
| 2698 | QualType T, TypeSourceInfo *TSInfo, |
| 2699 | StorageClass SC); |
| 2700 | void ActOnParamDefaultArgument(Decl *param, |
| 2701 | SourceLocation EqualLoc, |
| 2702 | Expr *defarg); |
| 2703 | void ActOnParamUnparsedDefaultArgument(Decl *param, SourceLocation EqualLoc, |
| 2704 | SourceLocation ArgLoc); |
| 2705 | void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc); |
| 2706 | ExprResult ConvertParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, |
| 2707 | SourceLocation EqualLoc); |
| 2708 | void SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, |
| 2709 | SourceLocation EqualLoc); |
| 2710 | |
| 2711 | // Contexts where using non-trivial C union types can be disallowed. This is |
| 2712 | // passed to err_non_trivial_c_union_in_invalid_context. |
| 2713 | enum NonTrivialCUnionContext { |
| 2714 | // Function parameter. |
| 2715 | NTCUC_FunctionParam, |
| 2716 | // Function return. |
| 2717 | NTCUC_FunctionReturn, |
| 2718 | // Default-initialized object. |
| 2719 | NTCUC_DefaultInitializedObject, |
| 2720 | // Variable with automatic storage duration. |
| 2721 | NTCUC_AutoVar, |
| 2722 | // Initializer expression that might copy from another object. |
| 2723 | NTCUC_CopyInit, |
| 2724 | // Assignment. |
| 2725 | NTCUC_Assignment, |
| 2726 | // Compound literal. |
| 2727 | NTCUC_CompoundLiteral, |
| 2728 | // Block capture. |
| 2729 | NTCUC_BlockCapture, |
| 2730 | // lvalue-to-rvalue conversion of volatile type. |
| 2731 | NTCUC_LValueToRValueVolatile, |
| 2732 | }; |
| 2733 | |
| 2734 | /// Emit diagnostics if the initializer or any of its explicit or |
| 2735 | /// implicitly-generated subexpressions require copying or |
| 2736 | /// default-initializing a type that is or contains a C union type that is |
| 2737 | /// non-trivial to copy or default-initialize. |
| 2738 | void checkNonTrivialCUnionInInitializer(const Expr *Init, SourceLocation Loc); |
| 2739 | |
| 2740 | // These flags are passed to checkNonTrivialCUnion. |
| 2741 | enum NonTrivialCUnionKind { |
| 2742 | NTCUK_Init = 0x1, |
| 2743 | NTCUK_Destruct = 0x2, |
| 2744 | NTCUK_Copy = 0x4, |
| 2745 | }; |
| 2746 | |
| 2747 | /// Emit diagnostics if a non-trivial C union type or a struct that contains |
| 2748 | /// a non-trivial C union is used in an invalid context. |
| 2749 | void checkNonTrivialCUnion(QualType QT, SourceLocation Loc, |
| 2750 | NonTrivialCUnionContext UseContext, |
| 2751 | unsigned NonTrivialKind); |
| 2752 | |
| 2753 | void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit); |
| 2754 | void ActOnUninitializedDecl(Decl *dcl); |
| 2755 | void ActOnInitializerError(Decl *Dcl); |
| 2756 | |
| 2757 | void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc); |
| 2758 | void ActOnCXXForRangeDecl(Decl *D); |
| 2759 | StmtResult ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc, |
| 2760 | IdentifierInfo *Ident, |
| 2761 | ParsedAttributes &Attrs, |
| 2762 | SourceLocation AttrEnd); |
| 2763 | void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); |
| 2764 | void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); |
| 2765 | void CheckStaticLocalForDllExport(VarDecl *VD); |
| 2766 | void FinalizeDeclaration(Decl *D); |
| 2767 | DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, |
| 2768 | ArrayRef<Decl *> Group); |
| 2769 | DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef<Decl *> Group); |
| 2770 | |
| 2771 | /// Should be called on all declarations that might have attached |
| 2772 | /// documentation comments. |
| 2773 | void ActOnDocumentableDecl(Decl *D); |
| 2774 | void ActOnDocumentableDecls(ArrayRef<Decl *> Group); |
| 2775 | |
| 2776 | void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, |
| 2777 | SourceLocation LocAfterDecls); |
| 2778 | void CheckForFunctionRedefinition( |
| 2779 | FunctionDecl *FD, const FunctionDecl *EffectiveDefinition = nullptr, |
| 2780 | SkipBodyInfo *SkipBody = nullptr); |
| 2781 | Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D, |
| 2782 | MultiTemplateParamsArg TemplateParamLists, |
| 2783 | SkipBodyInfo *SkipBody = nullptr); |
| 2784 | Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D, |
| 2785 | SkipBodyInfo *SkipBody = nullptr); |
| 2786 | void ActOnStartTrailingRequiresClause(Scope *S, Declarator &D); |
| 2787 | ExprResult ActOnFinishTrailingRequiresClause(ExprResult ConstraintExpr); |
| 2788 | ExprResult ActOnRequiresClause(ExprResult ConstraintExpr); |
| 2789 | void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); |
| 2790 | bool isObjCMethodDecl(Decl *D) { |
| 2791 | return D && isa<ObjCMethodDecl>(D); |
| 2792 | } |
| 2793 | |
| 2794 | /// Determine whether we can delay parsing the body of a function or |
| 2795 | /// function template until it is used, assuming we don't care about emitting |
| 2796 | /// code for that function. |
| 2797 | /// |
| 2798 | /// This will be \c false if we may need the body of the function in the |
| 2799 | /// middle of parsing an expression (where it's impractical to switch to |
| 2800 | /// parsing a different function), for instance, if it's constexpr in C++11 |
| 2801 | /// or has an 'auto' return type in C++14. These cases are essentially bugs. |
| 2802 | bool canDelayFunctionBody(const Declarator &D); |
| 2803 | |
| 2804 | /// Determine whether we can skip parsing the body of a function |
| 2805 | /// definition, assuming we don't care about analyzing its body or emitting |
| 2806 | /// code for that function. |
| 2807 | /// |
| 2808 | /// This will be \c false only if we may need the body of the function in |
| 2809 | /// order to parse the rest of the program (for instance, if it is |
| 2810 | /// \c constexpr in C++11 or has an 'auto' return type in C++14). |
| 2811 | bool canSkipFunctionBody(Decl *D); |
| 2812 | |
| 2813 | void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); |
| 2814 | Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); |
| 2815 | Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); |
| 2816 | Decl *ActOnSkippedFunctionBody(Decl *Decl); |
| 2817 | void ActOnFinishInlineFunctionDef(FunctionDecl *D); |
| 2818 | |
| 2819 | /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an |
| 2820 | /// attribute for which parsing is delayed. |
| 2821 | void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); |
| 2822 | |
| 2823 | /// Diagnose any unused parameters in the given sequence of |
| 2824 | /// ParmVarDecl pointers. |
| 2825 | void DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters); |
| 2826 | |
| 2827 | /// Diagnose whether the size of parameters or return value of a |
| 2828 | /// function or obj-c method definition is pass-by-value and larger than a |
| 2829 | /// specified threshold. |
| 2830 | void |
| 2831 | DiagnoseSizeOfParametersAndReturnValue(ArrayRef<ParmVarDecl *> Parameters, |
| 2832 | QualType ReturnTy, NamedDecl *D); |
| 2833 | |
| 2834 | void DiagnoseInvalidJumps(Stmt *Body); |
| 2835 | Decl *ActOnFileScopeAsmDecl(Expr *expr, |
| 2836 | SourceLocation AsmLoc, |
| 2837 | SourceLocation RParenLoc); |
| 2838 | |
| 2839 | /// Handle a C++11 empty-declaration and attribute-declaration. |
| 2840 | Decl *ActOnEmptyDeclaration(Scope *S, const ParsedAttributesView &AttrList, |
| 2841 | SourceLocation SemiLoc); |
| 2842 | |
| 2843 | enum class ModuleDeclKind { |
| 2844 | Interface, ///< 'export module X;' |
| 2845 | Implementation, ///< 'module X;' |
| 2846 | }; |
| 2847 | |
| 2848 | /// The parser has processed a module-declaration that begins the definition |
| 2849 | /// of a module interface or implementation. |
| 2850 | DeclGroupPtrTy ActOnModuleDecl(SourceLocation StartLoc, |
| 2851 | SourceLocation ModuleLoc, ModuleDeclKind MDK, |
| 2852 | ModuleIdPath Path, bool IsFirstDecl); |
| 2853 | |
| 2854 | /// The parser has processed a global-module-fragment declaration that begins |
| 2855 | /// the definition of the global module fragment of the current module unit. |
| 2856 | /// \param ModuleLoc The location of the 'module' keyword. |
| 2857 | DeclGroupPtrTy ActOnGlobalModuleFragmentDecl(SourceLocation ModuleLoc); |
| 2858 | |
| 2859 | /// The parser has processed a private-module-fragment declaration that begins |
| 2860 | /// the definition of the private module fragment of the current module unit. |
| 2861 | /// \param ModuleLoc The location of the 'module' keyword. |
| 2862 | /// \param PrivateLoc The location of the 'private' keyword. |
| 2863 | DeclGroupPtrTy ActOnPrivateModuleFragmentDecl(SourceLocation ModuleLoc, |
| 2864 | SourceLocation PrivateLoc); |
| 2865 | |
| 2866 | /// The parser has processed a module import declaration. |
| 2867 | /// |
| 2868 | /// \param StartLoc The location of the first token in the declaration. This |
| 2869 | /// could be the location of an '@', 'export', or 'import'. |
| 2870 | /// \param ExportLoc The location of the 'export' keyword, if any. |
| 2871 | /// \param ImportLoc The location of the 'import' keyword. |
| 2872 | /// \param Path The module access path. |
| 2873 | DeclResult ActOnModuleImport(SourceLocation StartLoc, |
| 2874 | SourceLocation ExportLoc, |
| 2875 | SourceLocation ImportLoc, ModuleIdPath Path); |
| 2876 | DeclResult ActOnModuleImport(SourceLocation StartLoc, |
| 2877 | SourceLocation ExportLoc, |
| 2878 | SourceLocation ImportLoc, Module *M, |
| 2879 | ModuleIdPath Path = {}); |
| 2880 | |
| 2881 | /// The parser has processed a module import translated from a |
| 2882 | /// #include or similar preprocessing directive. |
| 2883 | void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod); |
| 2884 | void BuildModuleInclude(SourceLocation DirectiveLoc, Module *Mod); |
| 2885 | |
| 2886 | /// The parsed has entered a submodule. |
| 2887 | void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod); |
| 2888 | /// The parser has left a submodule. |
| 2889 | void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod); |
| 2890 | |
| 2891 | /// Create an implicit import of the given module at the given |
| 2892 | /// source location, for error recovery, if possible. |
| 2893 | /// |
| 2894 | /// This routine is typically used when an entity found by name lookup |
| 2895 | /// is actually hidden within a module that we know about but the user |
| 2896 | /// has forgotten to import. |
| 2897 | void createImplicitModuleImportForErrorRecovery(SourceLocation Loc, |
| 2898 | Module *Mod); |
| 2899 | |
| 2900 | /// Kinds of missing import. Note, the values of these enumerators correspond |
| 2901 | /// to %select values in diagnostics. |
| 2902 | enum class MissingImportKind { |
| 2903 | Declaration, |
| 2904 | Definition, |
| 2905 | DefaultArgument, |
| 2906 | ExplicitSpecialization, |
| 2907 | PartialSpecialization |
| 2908 | }; |
| 2909 | |
| 2910 | /// Diagnose that the specified declaration needs to be visible but |
| 2911 | /// isn't, and suggest a module import that would resolve the problem. |
| 2912 | void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl, |
| 2913 | MissingImportKind MIK, bool Recover = true); |
| 2914 | void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl, |
| 2915 | SourceLocation DeclLoc, ArrayRef<Module *> Modules, |
| 2916 | MissingImportKind MIK, bool Recover); |
| 2917 | |
| 2918 | Decl *ActOnStartExportDecl(Scope *S, SourceLocation ExportLoc, |
| 2919 | SourceLocation LBraceLoc); |
| 2920 | Decl *ActOnFinishExportDecl(Scope *S, Decl *ExportDecl, |
| 2921 | SourceLocation RBraceLoc); |
| 2922 | |
| 2923 | /// We've found a use of a templated declaration that would trigger an |
| 2924 | /// implicit instantiation. Check that any relevant explicit specializations |
| 2925 | /// and partial specializations are visible, and diagnose if not. |
| 2926 | void checkSpecializationVisibility(SourceLocation Loc, NamedDecl *Spec); |
| 2927 | |
| 2928 | /// Retrieve a suitable printing policy for diagnostics. |
| 2929 | PrintingPolicy getPrintingPolicy() const { |
| 2930 | return getPrintingPolicy(Context, PP); |
| 2931 | } |
| 2932 | |
| 2933 | /// Retrieve a suitable printing policy for diagnostics. |
| 2934 | static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, |
| 2935 | const Preprocessor &PP); |
| 2936 | |
| 2937 | /// Scope actions. |
| 2938 | void ActOnPopScope(SourceLocation Loc, Scope *S); |
| 2939 | void ActOnTranslationUnitScope(Scope *S); |
| 2940 | |
| 2941 | Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, |
| 2942 | RecordDecl *&AnonRecord); |
| 2943 | Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, |
| 2944 | MultiTemplateParamsArg TemplateParams, |
| 2945 | bool IsExplicitInstantiation, |
| 2946 | RecordDecl *&AnonRecord); |
| 2947 | |
| 2948 | Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, |
| 2949 | AccessSpecifier AS, |
| 2950 | RecordDecl *Record, |
| 2951 | const PrintingPolicy &Policy); |
| 2952 | |
| 2953 | Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, |
| 2954 | RecordDecl *Record); |
| 2955 | |
| 2956 | /// Common ways to introduce type names without a tag for use in diagnostics. |
| 2957 | /// Keep in sync with err_tag_reference_non_tag. |
| 2958 | enum NonTagKind { |
| 2959 | NTK_NonStruct, |
| 2960 | NTK_NonClass, |
| 2961 | NTK_NonUnion, |
| 2962 | NTK_NonEnum, |
| 2963 | NTK_Typedef, |
| 2964 | NTK_TypeAlias, |
| 2965 | NTK_Template, |
| 2966 | NTK_TypeAliasTemplate, |
| 2967 | NTK_TemplateTemplateArgument, |
| 2968 | }; |
| 2969 | |
| 2970 | /// Given a non-tag type declaration, returns an enum useful for indicating |
| 2971 | /// what kind of non-tag type this is. |
| 2972 | NonTagKind getNonTagTypeDeclKind(const Decl *D, TagTypeKind TTK); |
| 2973 | |
| 2974 | bool isAcceptableTagRedeclaration(const TagDecl *Previous, |
| 2975 | TagTypeKind NewTag, bool isDefinition, |
| 2976 | SourceLocation NewTagLoc, |
| 2977 | const IdentifierInfo *Name); |
| 2978 | |
| 2979 | enum TagUseKind { |
| 2980 | TUK_Reference, // Reference to a tag: 'struct foo *X;' |
| 2981 | TUK_Declaration, // Fwd decl of a tag: 'struct foo;' |
| 2982 | TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' |
| 2983 | TUK_Friend // Friend declaration: 'friend struct foo;' |
| 2984 | }; |
| 2985 | |
| 2986 | Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
| 2987 | SourceLocation KWLoc, CXXScopeSpec &SS, IdentifierInfo *Name, |
| 2988 | SourceLocation NameLoc, const ParsedAttributesView &Attr, |
| 2989 | AccessSpecifier AS, SourceLocation ModulePrivateLoc, |
| 2990 | MultiTemplateParamsArg TemplateParameterLists, bool &OwnedDecl, |
| 2991 | bool &IsDependent, SourceLocation ScopedEnumKWLoc, |
| 2992 | bool ScopedEnumUsesClassTag, TypeResult UnderlyingType, |
| 2993 | bool IsTypeSpecifier, bool IsTemplateParamOrArg, |
| 2994 | SkipBodyInfo *SkipBody = nullptr); |
| 2995 | |
| 2996 | Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, |
| 2997 | unsigned TagSpec, SourceLocation TagLoc, |
| 2998 | CXXScopeSpec &SS, IdentifierInfo *Name, |
| 2999 | SourceLocation NameLoc, |
| 3000 | const ParsedAttributesView &Attr, |
| 3001 | MultiTemplateParamsArg TempParamLists); |
| 3002 | |
| 3003 | TypeResult ActOnDependentTag(Scope *S, |
| 3004 | unsigned TagSpec, |
| 3005 | TagUseKind TUK, |
| 3006 | const CXXScopeSpec &SS, |
| 3007 | IdentifierInfo *Name, |
| 3008 | SourceLocation TagLoc, |
| 3009 | SourceLocation NameLoc); |
| 3010 | |
| 3011 | void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, |
| 3012 | IdentifierInfo *ClassName, |
| 3013 | SmallVectorImpl<Decl *> &Decls); |
| 3014 | Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, |
| 3015 | Declarator &D, Expr *BitfieldWidth); |
| 3016 | |
| 3017 | FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, |
| 3018 | Declarator &D, Expr *BitfieldWidth, |
| 3019 | InClassInitStyle InitStyle, |
| 3020 | AccessSpecifier AS); |
| 3021 | MSPropertyDecl *HandleMSProperty(Scope *S, RecordDecl *TagD, |
| 3022 | SourceLocation DeclStart, Declarator &D, |
| 3023 | Expr *BitfieldWidth, |
| 3024 | InClassInitStyle InitStyle, |
| 3025 | AccessSpecifier AS, |
| 3026 | const ParsedAttr &MSPropertyAttr); |
| 3027 | |
| 3028 | FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, |
| 3029 | TypeSourceInfo *TInfo, |
| 3030 | RecordDecl *Record, SourceLocation Loc, |
| 3031 | bool Mutable, Expr *BitfieldWidth, |
| 3032 | InClassInitStyle InitStyle, |
| 3033 | SourceLocation TSSL, |
| 3034 | AccessSpecifier AS, NamedDecl *PrevDecl, |
| 3035 | Declarator *D = nullptr); |
| 3036 | |
| 3037 | bool CheckNontrivialField(FieldDecl *FD); |
| 3038 | void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM); |
| 3039 | |
| 3040 | enum TrivialABIHandling { |
| 3041 | /// The triviality of a method unaffected by "trivial_abi". |
| 3042 | TAH_IgnoreTrivialABI, |
| 3043 | |
| 3044 | /// The triviality of a method affected by "trivial_abi". |
| 3045 | TAH_ConsiderTrivialABI |
| 3046 | }; |
| 3047 | |
| 3048 | bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, |
| 3049 | TrivialABIHandling TAH = TAH_IgnoreTrivialABI, |
| 3050 | bool Diagnose = false); |
| 3051 | |
| 3052 | /// For a defaulted function, the kind of defaulted function that it is. |
| 3053 | class DefaultedFunctionKind { |
| 3054 | CXXSpecialMember SpecialMember : 8; |
| 3055 | DefaultedComparisonKind Comparison : 8; |
| 3056 | |
| 3057 | public: |
| 3058 | DefaultedFunctionKind() |
| 3059 | : SpecialMember(CXXInvalid), Comparison(DefaultedComparisonKind::None) { |
| 3060 | } |
| 3061 | DefaultedFunctionKind(CXXSpecialMember CSM) |
| 3062 | : SpecialMember(CSM), Comparison(DefaultedComparisonKind::None) {} |
| 3063 | DefaultedFunctionKind(DefaultedComparisonKind Comp) |
| 3064 | : SpecialMember(CXXInvalid), Comparison(Comp) {} |
| 3065 | |
| 3066 | bool isSpecialMember() const { return SpecialMember != CXXInvalid; } |
| 3067 | bool isComparison() const { |
| 3068 | return Comparison != DefaultedComparisonKind::None; |
| 3069 | } |
| 3070 | |
| 3071 | explicit operator bool() const { |
| 3072 | return isSpecialMember() || isComparison(); |
| 3073 | } |
| 3074 | |
| 3075 | CXXSpecialMember asSpecialMember() const { return SpecialMember; } |
| 3076 | DefaultedComparisonKind asComparison() const { return Comparison; } |
| 3077 | |
| 3078 | /// Get the index of this function kind for use in diagnostics. |
| 3079 | unsigned getDiagnosticIndex() const { |
| 3080 | static_assert(CXXInvalid > CXXDestructor, |
| 3081 | "invalid should have highest index"); |
| 3082 | static_assert((unsigned)DefaultedComparisonKind::None == 0, |
| 3083 | "none should be equal to zero"); |
| 3084 | return SpecialMember + (unsigned)Comparison; |
| 3085 | } |
| 3086 | }; |
| 3087 | |
| 3088 | DefaultedFunctionKind getDefaultedFunctionKind(const FunctionDecl *FD); |
| 3089 | |
| 3090 | CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD) { |
| 3091 | return getDefaultedFunctionKind(MD).asSpecialMember(); |
| 3092 | } |
| 3093 | DefaultedComparisonKind getDefaultedComparisonKind(const FunctionDecl *FD) { |
| 3094 | return getDefaultedFunctionKind(FD).asComparison(); |
| 3095 | } |
| 3096 | |
| 3097 | void ActOnLastBitfield(SourceLocation DeclStart, |
| 3098 | SmallVectorImpl<Decl *> &AllIvarDecls); |
| 3099 | Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, |
| 3100 | Declarator &D, Expr *BitfieldWidth, |
| 3101 | tok::ObjCKeywordKind visibility); |
| 3102 | |
| 3103 | // This is used for both record definitions and ObjC interface declarations. |
| 3104 | void ActOnFields(Scope *S, SourceLocation RecLoc, Decl *TagDecl, |
| 3105 | ArrayRef<Decl *> Fields, SourceLocation LBrac, |
| 3106 | SourceLocation RBrac, const ParsedAttributesView &AttrList); |
| 3107 | |
| 3108 | /// ActOnTagStartDefinition - Invoked when we have entered the |
| 3109 | /// scope of a tag's definition (e.g., for an enumeration, class, |
| 3110 | /// struct, or union). |
| 3111 | void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); |
| 3112 | |
| 3113 | /// Perform ODR-like check for C/ObjC when merging tag types from modules. |
| 3114 | /// Differently from C++, actually parse the body and reject / error out |
| 3115 | /// in case of a structural mismatch. |
| 3116 | bool ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev, |
| 3117 | SkipBodyInfo &SkipBody); |
| 3118 | |
| 3119 | typedef void *SkippedDefinitionContext; |
| 3120 | |
| 3121 | /// Invoked when we enter a tag definition that we're skipping. |
| 3122 | SkippedDefinitionContext ActOnTagStartSkippedDefinition(Scope *S, Decl *TD); |
| 3123 | |
| 3124 | Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); |
| 3125 | |
| 3126 | /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a |
| 3127 | /// C++ record definition's base-specifiers clause and are starting its |
| 3128 | /// member declarations. |
| 3129 | void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, |
| 3130 | SourceLocation FinalLoc, |
| 3131 | bool IsFinalSpelledSealed, |
| 3132 | SourceLocation LBraceLoc); |
| 3133 | |
| 3134 | /// ActOnTagFinishDefinition - Invoked once we have finished parsing |
| 3135 | /// the definition of a tag (enumeration, class, struct, or union). |
| 3136 | void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, |
| 3137 | SourceRange BraceRange); |
| 3138 | |
| 3139 | void ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context); |
| 3140 | |
| 3141 | void ActOnObjCContainerFinishDefinition(); |
| 3142 | |
| 3143 | /// Invoked when we must temporarily exit the objective-c container |
| 3144 | /// scope for parsing/looking-up C constructs. |
| 3145 | /// |
| 3146 | /// Must be followed by a call to \see ActOnObjCReenterContainerContext |
| 3147 | void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); |
| 3148 | void ActOnObjCReenterContainerContext(DeclContext *DC); |
| 3149 | |
| 3150 | /// ActOnTagDefinitionError - Invoked when there was an unrecoverable |
| 3151 | /// error parsing the definition of a tag. |
| 3152 | void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); |
| 3153 | |
| 3154 | EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, |
| 3155 | EnumConstantDecl *LastEnumConst, |
| 3156 | SourceLocation IdLoc, |
| 3157 | IdentifierInfo *Id, |
| 3158 | Expr *val); |
| 3159 | bool CheckEnumUnderlyingType(TypeSourceInfo *TI); |
| 3160 | bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, |
| 3161 | QualType EnumUnderlyingTy, bool IsFixed, |
| 3162 | const EnumDecl *Prev); |
| 3163 | |
| 3164 | /// Determine whether the body of an anonymous enumeration should be skipped. |
| 3165 | /// \param II The name of the first enumerator. |
| 3166 | SkipBodyInfo shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II, |
| 3167 | SourceLocation IILoc); |
| 3168 | |
| 3169 | Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, |
| 3170 | SourceLocation IdLoc, IdentifierInfo *Id, |
| 3171 | const ParsedAttributesView &Attrs, |
| 3172 | SourceLocation EqualLoc, Expr *Val); |
| 3173 | void ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange, |
| 3174 | Decl *EnumDecl, ArrayRef<Decl *> Elements, Scope *S, |
| 3175 | const ParsedAttributesView &Attr); |
| 3176 | |
| 3177 | /// Set the current declaration context until it gets popped. |
| 3178 | void PushDeclContext(Scope *S, DeclContext *DC); |
| 3179 | void PopDeclContext(); |
| 3180 | |
| 3181 | /// EnterDeclaratorContext - Used when we must lookup names in the context |
| 3182 | /// of a declarator's nested name specifier. |
| 3183 | void EnterDeclaratorContext(Scope *S, DeclContext *DC); |
| 3184 | void ExitDeclaratorContext(Scope *S); |
| 3185 | |
| 3186 | /// Enter a template parameter scope, after it's been associated with a particular |
| 3187 | /// DeclContext. Causes lookup within the scope to chain through enclosing contexts |
| 3188 | /// in the correct order. |
| 3189 | void EnterTemplatedContext(Scope *S, DeclContext *DC); |
| 3190 | |
| 3191 | /// Push the parameters of D, which must be a function, into scope. |
| 3192 | void ActOnReenterFunctionContext(Scope* S, Decl* D); |
| 3193 | void ActOnExitFunctionContext(); |
| 3194 | |
| 3195 | DeclContext *getFunctionLevelDeclContext(); |
| 3196 | |
| 3197 | /// getCurFunctionDecl - If inside of a function body, this returns a pointer |
| 3198 | /// to the function decl for the function being parsed. If we're currently |
| 3199 | /// in a 'block', this returns the containing context. |
| 3200 | FunctionDecl *getCurFunctionDecl(); |
| 3201 | |
| 3202 | /// getCurMethodDecl - If inside of a method body, this returns a pointer to |
| 3203 | /// the method decl for the method being parsed. If we're currently |
| 3204 | /// in a 'block', this returns the containing context. |
| 3205 | ObjCMethodDecl *getCurMethodDecl(); |
| 3206 | |
| 3207 | /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method |
| 3208 | /// or C function we're in, otherwise return null. If we're currently |
| 3209 | /// in a 'block', this returns the containing context. |
| 3210 | NamedDecl *getCurFunctionOrMethodDecl(); |
| 3211 | |
| 3212 | /// Add this decl to the scope shadowed decl chains. |
| 3213 | void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); |
| 3214 | |
| 3215 | /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true |
| 3216 | /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns |
| 3217 | /// true if 'D' belongs to the given declaration context. |
| 3218 | /// |
| 3219 | /// \param AllowInlineNamespace If \c true, allow the declaration to be in the |
| 3220 | /// enclosing namespace set of the context, rather than contained |
| 3221 | /// directly within it. |
| 3222 | bool isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S = nullptr, |
| 3223 | bool AllowInlineNamespace = false); |
| 3224 | |
| 3225 | /// Finds the scope corresponding to the given decl context, if it |
| 3226 | /// happens to be an enclosing scope. Otherwise return NULL. |
| 3227 | static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); |
| 3228 | |
| 3229 | /// Subroutines of ActOnDeclarator(). |
| 3230 | TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, |
| 3231 | TypeSourceInfo *TInfo); |
| 3232 | bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); |
| 3233 | |
| 3234 | /// Describes the kind of merge to perform for availability |
| 3235 | /// attributes (including "deprecated", "unavailable", and "availability"). |
| 3236 | enum AvailabilityMergeKind { |
| 3237 | /// Don't merge availability attributes at all. |
| 3238 | AMK_None, |
| 3239 | /// Merge availability attributes for a redeclaration, which requires |
| 3240 | /// an exact match. |
| 3241 | AMK_Redeclaration, |
| 3242 | /// Merge availability attributes for an override, which requires |
| 3243 | /// an exact match or a weakening of constraints. |
| 3244 | AMK_Override, |
| 3245 | /// Merge availability attributes for an implementation of |
| 3246 | /// a protocol requirement. |
| 3247 | AMK_ProtocolImplementation, |
| 3248 | }; |
| 3249 | |
| 3250 | /// Describes the kind of priority given to an availability attribute. |
| 3251 | /// |
| 3252 | /// The sum of priorities deteremines the final priority of the attribute. |
| 3253 | /// The final priority determines how the attribute will be merged. |
| 3254 | /// An attribute with a lower priority will always remove higher priority |
| 3255 | /// attributes for the specified platform when it is being applied. An |
| 3256 | /// attribute with a higher priority will not be applied if the declaration |
| 3257 | /// already has an availability attribute with a lower priority for the |
| 3258 | /// specified platform. The final prirority values are not expected to match |
| 3259 | /// the values in this enumeration, but instead should be treated as a plain |
| 3260 | /// integer value. This enumeration just names the priority weights that are |
| 3261 | /// used to calculate that final vaue. |
| 3262 | enum AvailabilityPriority : int { |
| 3263 | /// The availability attribute was specified explicitly next to the |
| 3264 | /// declaration. |
| 3265 | AP_Explicit = 0, |
| 3266 | |
| 3267 | /// The availability attribute was applied using '#pragma clang attribute'. |
| 3268 | AP_PragmaClangAttribute = 1, |
| 3269 | |
| 3270 | /// The availability attribute for a specific platform was inferred from |
| 3271 | /// an availability attribute for another platform. |
| 3272 | AP_InferredFromOtherPlatform = 2 |
| 3273 | }; |
| 3274 | |
| 3275 | /// Attribute merging methods. Return true if a new attribute was added. |
| 3276 | AvailabilityAttr * |
| 3277 | mergeAvailabilityAttr(NamedDecl *D, const AttributeCommonInfo &CI, |
| 3278 | IdentifierInfo *Platform, bool Implicit, |
| 3279 | VersionTuple Introduced, VersionTuple Deprecated, |
| 3280 | VersionTuple Obsoleted, bool IsUnavailable, |
| 3281 | StringRef Message, bool IsStrict, StringRef Replacement, |
| 3282 | AvailabilityMergeKind AMK, int Priority); |
| 3283 | TypeVisibilityAttr * |
| 3284 | mergeTypeVisibilityAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3285 | TypeVisibilityAttr::VisibilityType Vis); |
| 3286 | VisibilityAttr *mergeVisibilityAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3287 | VisibilityAttr::VisibilityType Vis); |
| 3288 | UuidAttr *mergeUuidAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3289 | StringRef UuidAsWritten, MSGuidDecl *GuidDecl); |
| 3290 | DLLImportAttr *mergeDLLImportAttr(Decl *D, const AttributeCommonInfo &CI); |
| 3291 | DLLExportAttr *mergeDLLExportAttr(Decl *D, const AttributeCommonInfo &CI); |
| 3292 | MSInheritanceAttr *mergeMSInheritanceAttr(Decl *D, |
| 3293 | const AttributeCommonInfo &CI, |
| 3294 | bool BestCase, |
| 3295 | MSInheritanceModel Model); |
| 3296 | FormatAttr *mergeFormatAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3297 | IdentifierInfo *Format, int FormatIdx, |
| 3298 | int FirstArg); |
| 3299 | SectionAttr *mergeSectionAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3300 | StringRef Name); |
| 3301 | CodeSegAttr *mergeCodeSegAttr(Decl *D, const AttributeCommonInfo &CI, |
| 3302 | StringRef Name); |
| 3303 | AlwaysInlineAttr *mergeAlwaysInlineAttr(Decl *D, |
| 3304 | const AttributeCommonInfo &CI, |
| 3305 | const IdentifierInfo *Ident); |
| 3306 | MinSizeAttr *mergeMinSizeAttr(Decl *D, const AttributeCommonInfo &CI); |
| 3307 | SwiftNameAttr *mergeSwiftNameAttr(Decl *D, const SwiftNameAttr &SNA, |
| 3308 | StringRef Name); |
| 3309 | OptimizeNoneAttr *mergeOptimizeNoneAttr(Decl *D, |
| 3310 | const AttributeCommonInfo &CI); |
| 3311 | InternalLinkageAttr *mergeInternalLinkageAttr(Decl *D, const ParsedAttr &AL); |
| 3312 | InternalLinkageAttr *mergeInternalLinkageAttr(Decl *D, |
| 3313 | const InternalLinkageAttr &AL); |
| 3314 | WebAssemblyImportNameAttr *mergeImportNameAttr( |
| 3315 | Decl *D, const WebAssemblyImportNameAttr &AL); |
| 3316 | WebAssemblyImportModuleAttr *mergeImportModuleAttr( |
| 3317 | Decl *D, const WebAssemblyImportModuleAttr &AL); |
| 3318 | EnforceTCBAttr *mergeEnforceTCBAttr(Decl *D, const EnforceTCBAttr &AL); |
| 3319 | EnforceTCBLeafAttr *mergeEnforceTCBLeafAttr(Decl *D, |
| 3320 | const EnforceTCBLeafAttr &AL); |
| 3321 | |
| 3322 | void mergeDeclAttributes(NamedDecl *New, Decl *Old, |
| 3323 | AvailabilityMergeKind AMK = AMK_Redeclaration); |
| 3324 | void MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New, |
| 3325 | LookupResult &OldDecls); |
| 3326 | bool MergeFunctionDecl(FunctionDecl *New, NamedDecl *&Old, Scope *S, |
| 3327 | bool MergeTypeWithOld); |
| 3328 | bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, |
| 3329 | Scope *S, bool MergeTypeWithOld); |
| 3330 | void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); |
| 3331 | void MergeVarDecl(VarDecl *New, LookupResult &Previous); |
| 3332 | void MergeVarDeclTypes(VarDecl *New, VarDecl *Old, bool MergeTypeWithOld); |
| 3333 | void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); |
| 3334 | bool checkVarDeclRedefinition(VarDecl *OldDefn, VarDecl *NewDefn); |
| 3335 | void notePreviousDefinition(const NamedDecl *Old, SourceLocation New); |
| 3336 | bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); |
| 3337 | |
| 3338 | // AssignmentAction - This is used by all the assignment diagnostic functions |
| 3339 | // to represent what is actually causing the operation |
| 3340 | enum AssignmentAction { |
| 3341 | AA_Assigning, |
| 3342 | AA_Passing, |
| 3343 | AA_Returning, |
| 3344 | AA_Converting, |
| 3345 | AA_Initializing, |
| 3346 | AA_Sending, |
| 3347 | AA_Casting, |
| 3348 | AA_Passing_CFAudited |
| 3349 | }; |
| 3350 | |
| 3351 | /// C++ Overloading. |
| 3352 | enum OverloadKind { |
| 3353 | /// This is a legitimate overload: the existing declarations are |
| 3354 | /// functions or function templates with different signatures. |
| 3355 | Ovl_Overload, |
| 3356 | |
| 3357 | /// This is not an overload because the signature exactly matches |
| 3358 | /// an existing declaration. |
| 3359 | Ovl_Match, |
| 3360 | |
| 3361 | /// This is not an overload because the lookup results contain a |
| 3362 | /// non-function. |
| 3363 | Ovl_NonFunction |
| 3364 | }; |
| 3365 | OverloadKind CheckOverload(Scope *S, |
| 3366 | FunctionDecl *New, |
| 3367 | const LookupResult &OldDecls, |
| 3368 | NamedDecl *&OldDecl, |
| 3369 | bool IsForUsingDecl); |
| 3370 | bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl, |
| 3371 | bool ConsiderCudaAttrs = true, |
| 3372 | bool ConsiderRequiresClauses = true); |
| 3373 | |
| 3374 | enum class AllowedExplicit { |
| 3375 | /// Allow no explicit functions to be used. |
| 3376 | None, |
| 3377 | /// Allow explicit conversion functions but not explicit constructors. |
| 3378 | Conversions, |
| 3379 | /// Allow both explicit conversion functions and explicit constructors. |
| 3380 | All |
| 3381 | }; |
| 3382 | |
| 3383 | ImplicitConversionSequence |
| 3384 | TryImplicitConversion(Expr *From, QualType ToType, |
| 3385 | bool SuppressUserConversions, |
| 3386 | AllowedExplicit AllowExplicit, |
| 3387 | bool InOverloadResolution, |
| 3388 | bool CStyle, |
| 3389 | bool AllowObjCWritebackConversion); |
| 3390 | |
| 3391 | bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); |
| 3392 | bool IsFloatingPointPromotion(QualType FromType, QualType ToType); |
| 3393 | bool IsComplexPromotion(QualType FromType, QualType ToType); |
| 3394 | bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, |
| 3395 | bool InOverloadResolution, |
| 3396 | QualType& ConvertedType, bool &IncompatibleObjC); |
| 3397 | bool isObjCPointerConversion(QualType FromType, QualType ToType, |
| 3398 | QualType& ConvertedType, bool &IncompatibleObjC); |
| 3399 | bool isObjCWritebackConversion(QualType FromType, QualType ToType, |
| 3400 | QualType &ConvertedType); |
| 3401 | bool IsBlockPointerConversion(QualType FromType, QualType ToType, |
| 3402 | QualType& ConvertedType); |
| 3403 | bool FunctionParamTypesAreEqual(const FunctionProtoType *OldType, |
| 3404 | const FunctionProtoType *NewType, |
| 3405 | unsigned *ArgPos = nullptr); |
| 3406 | void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, |
| 3407 | QualType FromType, QualType ToType); |
| 3408 | |
| 3409 | void maybeExtendBlockObject(ExprResult &E); |
| 3410 | CastKind PrepareCastToObjCObjectPointer(ExprResult &E); |
| 3411 | bool CheckPointerConversion(Expr *From, QualType ToType, |
| 3412 | CastKind &Kind, |
| 3413 | CXXCastPath& BasePath, |
| 3414 | bool IgnoreBaseAccess, |
| 3415 | bool Diagnose = true); |
| 3416 | bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, |
| 3417 | bool InOverloadResolution, |
| 3418 | QualType &ConvertedType); |
| 3419 | bool CheckMemberPointerConversion(Expr *From, QualType ToType, |
| 3420 | CastKind &Kind, |
| 3421 | CXXCastPath &BasePath, |
| 3422 | bool IgnoreBaseAccess); |
| 3423 | bool IsQualificationConversion(QualType FromType, QualType ToType, |
| 3424 | bool CStyle, bool &ObjCLifetimeConversion); |
| 3425 | bool IsFunctionConversion(QualType FromType, QualType ToType, |
| 3426 | QualType &ResultTy); |
| 3427 | bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); |
| 3428 | bool isSameOrCompatibleFunctionType(CanQualType Param, CanQualType Arg); |
| 3429 | |
| 3430 | ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, |
| 3431 | const VarDecl *NRVOCandidate, |
| 3432 | QualType ResultType, |
| 3433 | Expr *Value, |
| 3434 | bool AllowNRVO = true); |
| 3435 | |
| 3436 | bool CanPerformAggregateInitializationForOverloadResolution( |
| 3437 | const InitializedEntity &Entity, InitListExpr *From); |
| 3438 | |
| 3439 | bool IsStringInit(Expr *Init, const ArrayType *AT); |
| 3440 | |
| 3441 | bool CanPerformCopyInitialization(const InitializedEntity &Entity, |
| 3442 | ExprResult Init); |
| 3443 | ExprResult PerformCopyInitialization(const InitializedEntity &Entity, |
| 3444 | SourceLocation EqualLoc, |
| 3445 | ExprResult Init, |
| 3446 | bool TopLevelOfInitList = false, |
| 3447 | bool AllowExplicit = false); |
| 3448 | ExprResult PerformObjectArgumentInitialization(Expr *From, |
| 3449 | NestedNameSpecifier *Qualifier, |
| 3450 | NamedDecl *FoundDecl, |
| 3451 | CXXMethodDecl *Method); |
| 3452 | |
| 3453 | /// Check that the lifetime of the initializer (and its subobjects) is |
| 3454 | /// sufficient for initializing the entity, and perform lifetime extension |
| 3455 | /// (when permitted) if not. |
| 3456 | void checkInitializerLifetime(const InitializedEntity &Entity, Expr *Init); |
| 3457 | |
| 3458 | ExprResult PerformContextuallyConvertToBool(Expr *From); |
| 3459 | ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); |
| 3460 | |
| 3461 | /// Contexts in which a converted constant expression is required. |
| 3462 | enum CCEKind { |
| 3463 | CCEK_CaseValue, ///< Expression in a case label. |
| 3464 | CCEK_Enumerator, ///< Enumerator value with fixed underlying type. |
| 3465 | CCEK_TemplateArg, ///< Value of a non-type template parameter. |
| 3466 | CCEK_ArrayBound, ///< Array bound in array declarator or new-expression. |
| 3467 | CCEK_ConstexprIf, ///< Condition in a constexpr if statement. |
| 3468 | CCEK_ExplicitBool ///< Condition in an explicit(bool) specifier. |
| 3469 | }; |
| 3470 | ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, |
| 3471 | llvm::APSInt &Value, CCEKind CCE); |
| 3472 | ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, |
| 3473 | APValue &Value, CCEKind CCE, |
| 3474 | NamedDecl *Dest = nullptr); |
| 3475 | |
| 3476 | /// Abstract base class used to perform a contextual implicit |
| 3477 | /// conversion from an expression to any type passing a filter. |
| 3478 | class ContextualImplicitConverter { |
| 3479 | public: |
| 3480 | bool Suppress; |
| 3481 | bool SuppressConversion; |
| 3482 | |
| 3483 | ContextualImplicitConverter(bool Suppress = false, |
| 3484 | bool SuppressConversion = false) |
| 3485 | : Suppress(Suppress), SuppressConversion(SuppressConversion) {} |
| 3486 | |
| 3487 | /// Determine whether the specified type is a valid destination type |
| 3488 | /// for this conversion. |
| 3489 | virtual bool match(QualType T) = 0; |
| 3490 | |
| 3491 | /// Emits a diagnostic complaining that the expression does not have |
| 3492 | /// integral or enumeration type. |
| 3493 | virtual SemaDiagnosticBuilder |
| 3494 | diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) = 0; |
| 3495 | |
| 3496 | /// Emits a diagnostic when the expression has incomplete class type. |
| 3497 | virtual SemaDiagnosticBuilder |
| 3498 | diagnoseIncomplete(Sema &S, SourceLocation Loc, QualType T) = 0; |
| 3499 | |
| 3500 | /// Emits a diagnostic when the only matching conversion function |
| 3501 | /// is explicit. |
| 3502 | virtual SemaDiagnosticBuilder diagnoseExplicitConv( |
| 3503 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0; |
| 3504 | |
| 3505 | /// Emits a note for the explicit conversion function. |
| 3506 | virtual SemaDiagnosticBuilder |
| 3507 | noteExplicitConv(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0; |
| 3508 | |
| 3509 | /// Emits a diagnostic when there are multiple possible conversion |
| 3510 | /// functions. |
| 3511 | virtual SemaDiagnosticBuilder |
| 3512 | diagnoseAmbiguous(Sema &S, SourceLocation Loc, QualType T) = 0; |
| 3513 | |
| 3514 | /// Emits a note for one of the candidate conversions. |
| 3515 | virtual SemaDiagnosticBuilder |
| 3516 | noteAmbiguous(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0; |
| 3517 | |
| 3518 | /// Emits a diagnostic when we picked a conversion function |
| 3519 | /// (for cases when we are not allowed to pick a conversion function). |
| 3520 | virtual SemaDiagnosticBuilder diagnoseConversion( |
| 3521 | Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0; |
| 3522 | |
| 3523 | virtual ~ContextualImplicitConverter() {} |
| 3524 | }; |
| 3525 | |
| 3526 | class ICEConvertDiagnoser : public ContextualImplicitConverter { |
| 3527 | bool AllowScopedEnumerations; |
| 3528 | |
| 3529 | public: |
| 3530 | ICEConvertDiagnoser(bool AllowScopedEnumerations, |
| 3531 | bool Suppress, bool SuppressConversion) |
| 3532 | : ContextualImplicitConverter(Suppress, SuppressConversion), |
| 3533 | AllowScopedEnumerations(AllowScopedEnumerations) {} |
| 3534 | |
| 3535 | /// Match an integral or (possibly scoped) enumeration type. |
| 3536 | bool match(QualType T) override; |
| 3537 | |
| 3538 | SemaDiagnosticBuilder |
| 3539 | diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) override { |
| 3540 | return diagnoseNotInt(S, Loc, T); |
| 3541 | } |
| 3542 | |
| 3543 | /// Emits a diagnostic complaining that the expression does not have |
| 3544 | /// integral or enumeration type. |
| 3545 | virtual SemaDiagnosticBuilder |
| 3546 | diagnoseNotInt(Sema &S, SourceLocation Loc, QualType T) = 0; |
| 3547 | }; |
| 3548 | |
| 3549 | /// Perform a contextual implicit conversion. |
| 3550 | ExprResult PerformContextualImplicitConversion( |
| 3551 | SourceLocation Loc, Expr *FromE, ContextualImplicitConverter &Converter); |
| 3552 | |
| 3553 | |
| 3554 | enum ObjCSubscriptKind { |
| 3555 | OS_Array, |
| 3556 | OS_Dictionary, |
| 3557 | OS_Error |
| 3558 | }; |
| 3559 | ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); |
| 3560 | |
| 3561 | // Note that LK_String is intentionally after the other literals, as |
| 3562 | // this is used for diagnostics logic. |
| 3563 | enum ObjCLiteralKind { |
| 3564 | LK_Array, |
| 3565 | LK_Dictionary, |
| 3566 | LK_Numeric, |
| 3567 | LK_Boxed, |
| 3568 | LK_String, |
| 3569 | LK_Block, |
| 3570 | LK_None |
| 3571 | }; |
| 3572 | ObjCLiteralKind CheckLiteralKind(Expr *FromE); |
| 3573 | |
| 3574 | ExprResult PerformObjectMemberConversion(Expr *From, |
| 3575 | NestedNameSpecifier *Qualifier, |
| 3576 | NamedDecl *FoundDecl, |
| 3577 | NamedDecl *Member); |
| 3578 | |
| 3579 | // Members have to be NamespaceDecl* or TranslationUnitDecl*. |
| 3580 | // TODO: make this is a typesafe union. |
| 3581 | typedef llvm::SmallSetVector<DeclContext *, 16> AssociatedNamespaceSet; |
| 3582 | typedef llvm::SmallSetVector<CXXRecordDecl *, 16> AssociatedClassSet; |
| 3583 | |
| 3584 | using ADLCallKind = CallExpr::ADLCallKind; |
| 3585 | |
| 3586 | void AddOverloadCandidate(FunctionDecl *Function, DeclAccessPair FoundDecl, |
| 3587 | ArrayRef<Expr *> Args, |
| 3588 | OverloadCandidateSet &CandidateSet, |
| 3589 | bool SuppressUserConversions = false, |
| 3590 | bool PartialOverloading = false, |
| 3591 | bool AllowExplicit = true, |
| 3592 | bool AllowExplicitConversion = false, |
| 3593 | ADLCallKind IsADLCandidate = ADLCallKind::NotADL, |
| 3594 | ConversionSequenceList EarlyConversions = None, |
| 3595 | OverloadCandidateParamOrder PO = {}); |
| 3596 | void AddFunctionCandidates(const UnresolvedSetImpl &Functions, |
| 3597 | ArrayRef<Expr *> Args, |
| 3598 | OverloadCandidateSet &CandidateSet, |
| 3599 | TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr, |
| 3600 | bool SuppressUserConversions = false, |
| 3601 | bool PartialOverloading = false, |
| 3602 | bool FirstArgumentIsBase = false); |
| 3603 | void AddMethodCandidate(DeclAccessPair FoundDecl, |
| 3604 | QualType ObjectType, |
| 3605 | Expr::Classification ObjectClassification, |
| 3606 | ArrayRef<Expr *> Args, |
| 3607 | OverloadCandidateSet& CandidateSet, |
| 3608 | bool SuppressUserConversion = false, |
| 3609 | OverloadCandidateParamOrder PO = {}); |
| 3610 | void AddMethodCandidate(CXXMethodDecl *Method, |
| 3611 | DeclAccessPair FoundDecl, |
| 3612 | CXXRecordDecl *ActingContext, QualType ObjectType, |
| 3613 | Expr::Classification ObjectClassification, |
| 3614 | ArrayRef<Expr *> Args, |
| 3615 | OverloadCandidateSet& CandidateSet, |
| 3616 | bool SuppressUserConversions = false, |
| 3617 | bool PartialOverloading = false, |
| 3618 | ConversionSequenceList EarlyConversions = None, |
| 3619 | OverloadCandidateParamOrder PO = {}); |
| 3620 | void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, |
| 3621 | DeclAccessPair FoundDecl, |
| 3622 | CXXRecordDecl *ActingContext, |
| 3623 | TemplateArgumentListInfo *ExplicitTemplateArgs, |
| 3624 | QualType ObjectType, |
| 3625 | Expr::Classification ObjectClassification, |
| 3626 | ArrayRef<Expr *> Args, |
| 3627 | OverloadCandidateSet& CandidateSet, |
| 3628 | bool SuppressUserConversions = false, |
| 3629 | bool PartialOverloading = false, |
| 3630 | OverloadCandidateParamOrder PO = {}); |
| 3631 | void AddTemplateOverloadCandidate( |
| 3632 | FunctionTemplateDecl *FunctionTemplate, DeclAccessPair FoundDecl, |
| 3633 | TemplateArgumentListInfo *ExplicitTemplateArgs, ArrayRef<Expr *> Args, |
| 3634 | OverloadCandidateSet &CandidateSet, bool SuppressUserConversions = false, |
| 3635 | bool PartialOverloading = false, bool AllowExplicit = true, |
| 3636 | ADLCallKind IsADLCandidate = ADLCallKind::NotADL, |
| 3637 | OverloadCandidateParamOrder PO = {}); |
| 3638 | bool CheckNonDependentConversions( |
| 3639 | FunctionTemplateDecl *FunctionTemplate, ArrayRef<QualType> ParamTypes, |
| 3640 | ArrayRef<Expr *> Args, OverloadCandidateSet &CandidateSet, |
| 3641 | ConversionSequenceList &Conversions, bool SuppressUserConversions, |
| 3642 | CXXRecordDecl *ActingContext = nullptr, QualType ObjectType = QualType(), |
| 3643 | Expr::Classification ObjectClassification = {}, |
| 3644 | OverloadCandidateParamOrder PO = {}); |
| 3645 | void AddConversionCandidate( |
| 3646 | CXXConversionDecl *Conversion, DeclAccessPair FoundDecl, |
| 3647 | CXXRecordDecl *ActingContext, Expr *From, QualType ToType, |
| 3648 | OverloadCandidateSet &CandidateSet, bool AllowObjCConversionOnExplicit, |
| 3649 | bool AllowExplicit, bool AllowResultConversion = true); |
| 3650 | void AddTemplateConversionCandidate( |
| 3651 | FunctionTemplateDecl *FunctionTemplate, DeclAccessPair FoundDecl, |
| 3652 | CXXRecordDecl *ActingContext, Expr *From, QualType ToType, |
| 3653 | OverloadCandidateSet &CandidateSet, bool AllowObjCConversionOnExplicit, |
| 3654 | bool AllowExplicit, bool AllowResultConversion = true); |
| 3655 | void AddSurrogateCandidate(CXXConversionDecl *Conversion, |
| 3656 | DeclAccessPair FoundDecl, |
| 3657 | CXXRecordDecl *ActingContext, |
| 3658 | const FunctionProtoType *Proto, |
| 3659 | Expr *Object, ArrayRef<Expr *> Args, |
| 3660 | OverloadCandidateSet& CandidateSet); |
| 3661 | void AddNonMemberOperatorCandidates( |
| 3662 | const UnresolvedSetImpl &Functions, ArrayRef<Expr *> Args, |
| 3663 | OverloadCandidateSet &CandidateSet, |
| 3664 | TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr); |
| 3665 | void AddMemberOperatorCandidates(OverloadedOperatorKind Op, |
| 3666 | SourceLocation OpLoc, ArrayRef<Expr *> Args, |
| 3667 | OverloadCandidateSet &CandidateSet, |
| 3668 | OverloadCandidateParamOrder PO = {}); |
| 3669 | void AddBuiltinCandidate(QualType *ParamTys, ArrayRef<Expr *> Args, |
| 3670 | OverloadCandidateSet& CandidateSet, |
| 3671 | bool IsAssignmentOperator = false, |
| 3672 | unsigned NumContextualBoolArguments = 0); |
| 3673 | void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, |
| 3674 | SourceLocation OpLoc, ArrayRef<Expr *> Args, |
| 3675 | OverloadCandidateSet& CandidateSet); |
| 3676 | void AddArgumentDependentLookupCandidates(DeclarationName Name, |
| 3677 | SourceLocation Loc, |
| 3678 | ArrayRef<Expr *> Args, |
| 3679 | TemplateArgumentListInfo *ExplicitTemplateArgs, |
| 3680 | OverloadCandidateSet& CandidateSet, |
| 3681 | bool PartialOverloading = false); |
| 3682 | |
| 3683 | // Emit as a 'note' the specific overload candidate |
| 3684 | void NoteOverloadCandidate( |
| 3685 | NamedDecl *Found, FunctionDecl *Fn, |
| 3686 | OverloadCandidateRewriteKind RewriteKind = OverloadCandidateRewriteKind(), |
| 3687 | QualType DestType = QualType(), bool TakingAddress = false); |
| 3688 | |
| 3689 | // Emit as a series of 'note's all template and non-templates identified by |
| 3690 | // the expression Expr |
| 3691 | void NoteAllOverloadCandidates(Expr *E, QualType DestType = QualType(), |
| 3692 | bool TakingAddress = false); |
| 3693 | |
| 3694 | /// Check the enable_if expressions on the given function. Returns the first |
| 3695 | /// failing attribute, or NULL if they were all successful. |
| 3696 | EnableIfAttr *CheckEnableIf(FunctionDecl *Function, SourceLocation CallLoc, |
| 3697 | ArrayRef<Expr *> Args, |
| 3698 | bool MissingImplicitThis = false); |
| 3699 | |
| 3700 | /// Find the failed Boolean condition within a given Boolean |
| 3701 | /// constant expression, and describe it with a string. |
| 3702 | std::pair<Expr *, std::string> findFailedBooleanCondition(Expr *Cond); |
| 3703 | |
| 3704 | /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any |
| 3705 | /// non-ArgDependent DiagnoseIfAttrs. |
| 3706 | /// |
| 3707 | /// Argument-dependent diagnose_if attributes should be checked each time a |
| 3708 | /// function is used as a direct callee of a function call. |
| 3709 | /// |
| 3710 | /// Returns true if any errors were emitted. |
| 3711 | bool diagnoseArgDependentDiagnoseIfAttrs(const FunctionDecl *Function, |
| 3712 | const Expr *ThisArg, |
| 3713 | ArrayRef<const Expr *> Args, |
| 3714 | SourceLocation Loc); |
| 3715 | |
| 3716 | /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any |
| 3717 | /// ArgDependent DiagnoseIfAttrs. |
| 3718 | /// |
| 3719 | /// Argument-independent diagnose_if attributes should be checked on every use |
| 3720 | /// of a function. |
| 3721 | /// |
| 3722 | /// Returns true if any errors were emitted. |
| 3723 | bool diagnoseArgIndependentDiagnoseIfAttrs(const NamedDecl *ND, |
| 3724 | SourceLocation Loc); |
| 3725 | |
| 3726 | /// Returns whether the given function's address can be taken or not, |
| 3727 | /// optionally emitting a diagnostic if the address can't be taken. |
| 3728 | /// |
| 3729 | /// Returns false if taking the address of the function is illegal. |
| 3730 | bool checkAddressOfFunctionIsAvailable(const FunctionDecl *Function, |
| 3731 | bool Complain = false, |
| 3732 | SourceLocation Loc = SourceLocation()); |
| 3733 | |
| 3734 | // [PossiblyAFunctionType] --> [Return] |
| 3735 | // NonFunctionType --> NonFunctionType |
| 3736 | // R (A) --> R(A) |
| 3737 | // R (*)(A) --> R (A) |
| 3738 | // R (&)(A) --> R (A) |
| 3739 | // R (S::*)(A) --> R (A) |
| 3740 | QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); |
| 3741 | |
| 3742 | FunctionDecl * |
| 3743 | ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, |
| 3744 | QualType TargetType, |
| 3745 | bool Complain, |
| 3746 | DeclAccessPair &Found, |
| 3747 | bool *pHadMultipleCandidates = nullptr); |
| 3748 | |
| 3749 | FunctionDecl * |
| 3750 | resolveAddressOfSingleOverloadCandidate(Expr *E, DeclAccessPair &FoundResult); |
| 3751 | |
| 3752 | bool resolveAndFixAddressOfSingleOverloadCandidate( |
| 3753 | ExprResult &SrcExpr, bool DoFunctionPointerConversion = false); |
| 3754 | |
| 3755 | FunctionDecl * |
| 3756 | ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, |
| 3757 | bool Complain = false, |
| 3758 | DeclAccessPair *Found = nullptr); |
| 3759 | |
| 3760 | bool ResolveAndFixSingleFunctionTemplateSpecialization( |
| 3761 | ExprResult &SrcExpr, |
| 3762 | bool DoFunctionPointerConverion = false, |
| 3763 | bool Complain = false, |
| 3764 | SourceRange OpRangeForComplaining = SourceRange(), |
| 3765 | QualType DestTypeForComplaining = QualType(), |
| 3766 | unsigned DiagIDForComplaining = 0); |
| 3767 | |
| 3768 | |
| 3769 | Expr *FixOverloadedFunctionReference(Expr *E, |
| 3770 | DeclAccessPair FoundDecl, |
| 3771 | FunctionDecl *Fn); |
| 3772 | ExprResult FixOverloadedFunctionReference(ExprResult, |
| 3773 | DeclAccessPair FoundDecl, |
| 3774 | FunctionDecl *Fn); |
| 3775 | |
| 3776 | void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, |
| 3777 | ArrayRef<Expr *> Args, |
| 3778 | OverloadCandidateSet &CandidateSet, |
| 3779 | bool PartialOverloading = false); |
| 3780 | void AddOverloadedCallCandidates( |
| 3781 | LookupResult &R, TemplateArgumentListInfo *ExplicitTemplateArgs, |
| 3782 | ArrayRef<Expr *> Args, OverloadCandidateSet &CandidateSet); |
| 3783 | |
| 3784 | // An enum used to represent the different possible results of building a |
| 3785 | // range-based for loop. |
| 3786 | enum ForRangeStatus { |
| 3787 | FRS_Success, |
| 3788 | FRS_NoViableFunction, |
| 3789 | FRS_DiagnosticIssued |
| 3790 | }; |
| 3791 | |
| 3792 | ForRangeStatus BuildForRangeBeginEndCall(SourceLocation Loc, |
| 3793 | SourceLocation RangeLoc, |
| 3794 | const DeclarationNameInfo &NameInfo, |
| 3795 | LookupResult &MemberLookup, |
| 3796 | OverloadCandidateSet *CandidateSet, |
| 3797 | Expr *Range, ExprResult *CallExpr); |
| 3798 | |
| 3799 | ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, |
| 3800 | UnresolvedLookupExpr *ULE, |
| 3801 | SourceLocation LParenLoc, |
| 3802 | MultiExprArg Args, |
| 3803 | SourceLocation RParenLoc, |
| 3804 | Expr *ExecConfig, |
| 3805 | bool AllowTypoCorrection=true, |
| 3806 | bool CalleesAddressIsTaken=false); |
| 3807 | |
| 3808 | bool buildOverloadedCallSet(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE, |
| 3809 | MultiExprArg Args, SourceLocation RParenLoc, |
| 3810 | OverloadCandidateSet *CandidateSet, |
| 3811 | ExprResult *Result); |
| 3812 | |
| 3813 | ExprResult CreateUnresolvedLookupExpr(CXXRecordDecl *NamingClass, |
| 3814 | NestedNameSpecifierLoc NNSLoc, |
| 3815 | DeclarationNameInfo DNI, |
| 3816 | const UnresolvedSetImpl &Fns, |
| 3817 | bool PerformADL = true); |
| 3818 | |
| 3819 | ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, |
| 3820 | UnaryOperatorKind Opc, |
| 3821 | const UnresolvedSetImpl &Fns, |
| 3822 | Expr *input, bool RequiresADL = true); |
| 3823 | |
| 3824 | void LookupOverloadedBinOp(OverloadCandidateSet &CandidateSet, |
| 3825 | OverloadedOperatorKind Op, |
| 3826 | const UnresolvedSetImpl &Fns, |
| 3827 | ArrayRef<Expr *> Args, bool RequiresADL = true); |
| 3828 | ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, |
| 3829 | BinaryOperatorKind Opc, |
| 3830 | const UnresolvedSetImpl &Fns, |
| 3831 | Expr *LHS, Expr *RHS, |
| 3832 | bool RequiresADL = true, |
| 3833 | bool AllowRewrittenCandidates = true, |
| 3834 | FunctionDecl *DefaultedFn = nullptr); |
| 3835 | ExprResult BuildSynthesizedThreeWayComparison(SourceLocation OpLoc, |
| 3836 | const UnresolvedSetImpl &Fns, |
| 3837 | Expr *LHS, Expr *RHS, |
| 3838 | FunctionDecl *DefaultedFn); |
| 3839 | |
| 3840 | ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, |
| 3841 | SourceLocation RLoc, |
| 3842 | Expr *Base,Expr *Idx); |
| 3843 | |
| 3844 | ExprResult BuildCallToMemberFunction(Scope *S, Expr *MemExpr, |
| 3845 | SourceLocation LParenLoc, |
| 3846 | MultiExprArg Args, |
| 3847 | SourceLocation RParenLoc, |
| 3848 | bool AllowRecovery = false); |
| 3849 | ExprResult |
| 3850 | BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, |
| 3851 | MultiExprArg Args, |
| 3852 | SourceLocation RParenLoc); |
| 3853 | |
| 3854 | ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, |
| 3855 | SourceLocation OpLoc, |
| 3856 | bool *NoArrowOperatorFound = nullptr); |
| 3857 | |
| 3858 | /// CheckCallReturnType - Checks that a call expression's return type is |
| 3859 | /// complete. Returns true on failure. The location passed in is the location |
| 3860 | /// that best represents the call. |
| 3861 | bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, |
| 3862 | CallExpr *CE, FunctionDecl *FD); |
| 3863 | |
| 3864 | /// Helpers for dealing with blocks and functions. |
| 3865 | bool CheckParmsForFunctionDef(ArrayRef<ParmVarDecl *> Parameters, |
| 3866 | bool CheckParameterNames); |
| 3867 | void CheckCXXDefaultArguments(FunctionDecl *FD); |
| 3868 | void CheckExtraCXXDefaultArguments(Declarator &D); |
| 3869 | Scope *getNonFieldDeclScope(Scope *S); |
| 3870 | |
| 3871 | /// \name Name lookup |
| 3872 | /// |
| 3873 | /// These routines provide name lookup that is used during semantic |
| 3874 | /// analysis to resolve the various kinds of names (identifiers, |
| 3875 | /// overloaded operator names, constructor names, etc.) into zero or |
| 3876 | /// more declarations within a particular scope. The major entry |
| 3877 | /// points are LookupName, which performs unqualified name lookup, |
| 3878 | /// and LookupQualifiedName, which performs qualified name lookup. |
| 3879 | /// |
| 3880 | /// All name lookup is performed based on some specific criteria, |
| 3881 | /// which specify what names will be visible to name lookup and how |
| 3882 | /// far name lookup should work. These criteria are important both |
| 3883 | /// for capturing language semantics (certain lookups will ignore |
| 3884 | /// certain names, for example) and for performance, since name |
| 3885 | /// lookup is often a bottleneck in the compilation of C++. Name |
| 3886 | /// lookup criteria is specified via the LookupCriteria enumeration. |
| 3887 | /// |
| 3888 | /// The results of name lookup can vary based on the kind of name |
| 3889 | /// lookup performed, the current language, and the translation |
| 3890 | /// unit. In C, for example, name lookup will either return nothing |
| 3891 | /// (no entity found) or a single declaration. In C++, name lookup |
| 3892 | /// can additionally refer to a set of overloaded functions or |
| 3893 | /// result in an ambiguity. All of the possible results of name |
| 3894 | /// lookup are captured by the LookupResult class, which provides |
| 3895 | /// the ability to distinguish among them. |
| 3896 | //@{ |
| 3897 | |
| 3898 | /// Describes the kind of name lookup to perform. |
| 3899 | enum LookupNameKind { |
| 3900 | /// Ordinary name lookup, which finds ordinary names (functions, |
| 3901 | /// variables, typedefs, etc.) in C and most kinds of names |
| 3902 | /// (functions, variables, members, types, etc.) in C++. |
| 3903 | LookupOrdinaryName = 0, |
| 3904 | /// Tag name lookup, which finds the names of enums, classes, |
| 3905 | /// structs, and unions. |
| 3906 | LookupTagName, |
| 3907 | /// Label name lookup. |
| 3908 | LookupLabel, |
| 3909 | /// Member name lookup, which finds the names of |
| 3910 | /// class/struct/union members. |
| 3911 | LookupMemberName, |
| 3912 | /// Look up of an operator name (e.g., operator+) for use with |
| 3913 | /// operator overloading. This lookup is similar to ordinary name |
| 3914 | /// lookup, but will ignore any declarations that are class members. |
| 3915 | LookupOperatorName, |
| 3916 | /// Look up a name following ~ in a destructor name. This is an ordinary |
| 3917 | /// lookup, but prefers tags to typedefs. |
| 3918 | LookupDestructorName, |
| 3919 | /// Look up of a name that precedes the '::' scope resolution |
| 3920 | /// operator in C++. This lookup completely ignores operator, object, |
| 3921 | /// function, and enumerator names (C++ [basic.lookup.qual]p1). |
| 3922 | LookupNestedNameSpecifierName, |
| 3923 | /// Look up a namespace name within a C++ using directive or |
| 3924 | /// namespace alias definition, ignoring non-namespace names (C++ |
| 3925 | /// [basic.lookup.udir]p1). |
| 3926 | LookupNamespaceName, |
| 3927 | /// Look up all declarations in a scope with the given name, |
| 3928 | /// including resolved using declarations. This is appropriate |
| 3929 | /// for checking redeclarations for a using declaration. |
| 3930 | LookupUsingDeclName, |
| 3931 | /// Look up an ordinary name that is going to be redeclared as a |
| 3932 | /// name with linkage. This lookup ignores any declarations that |
| 3933 | /// are outside of the current scope unless they have linkage. See |
| 3934 | /// C99 6.2.2p4-5 and C++ [basic.link]p6. |
| 3935 | LookupRedeclarationWithLinkage, |
| 3936 | /// Look up a friend of a local class. This lookup does not look |
| 3937 | /// outside the innermost non-class scope. See C++11 [class.friend]p11. |
| 3938 | LookupLocalFriendName, |
| 3939 | /// Look up the name of an Objective-C protocol. |
| 3940 | LookupObjCProtocolName, |
| 3941 | /// Look up implicit 'self' parameter of an objective-c method. |
| 3942 | LookupObjCImplicitSelfParam, |
| 3943 | /// Look up the name of an OpenMP user-defined reduction operation. |
| 3944 | LookupOMPReductionName, |
| 3945 | /// Look up the name of an OpenMP user-defined mapper. |
| 3946 | LookupOMPMapperName, |
| 3947 | /// Look up any declaration with any name. |
| 3948 | LookupAnyName |
| 3949 | }; |
| 3950 | |
| 3951 | /// Specifies whether (or how) name lookup is being performed for a |
| 3952 | /// redeclaration (vs. a reference). |
| 3953 | enum RedeclarationKind { |
| 3954 | /// The lookup is a reference to this name that is not for the |
| 3955 | /// purpose of redeclaring the name. |
| 3956 | NotForRedeclaration = 0, |
| 3957 | /// The lookup results will be used for redeclaration of a name, |
| 3958 | /// if an entity by that name already exists and is visible. |
| 3959 | ForVisibleRedeclaration, |
| 3960 | /// The lookup results will be used for redeclaration of a name |
| 3961 | /// with external linkage; non-visible lookup results with external linkage |
| 3962 | /// may also be found. |
| 3963 | ForExternalRedeclaration |
| 3964 | }; |
| 3965 | |
| 3966 | RedeclarationKind forRedeclarationInCurContext() { |
| 3967 | // A declaration with an owning module for linkage can never link against |
| 3968 | // anything that is not visible. We don't need to check linkage here; if |
| 3969 | // the context has internal linkage, redeclaration lookup won't find things |
| 3970 | // from other TUs, and we can't safely compute linkage yet in general. |
| 3971 | if (cast<Decl>(CurContext) |
| 3972 | ->getOwningModuleForLinkage(/*IgnoreLinkage*/true)) |
| 3973 | return ForVisibleRedeclaration; |
| 3974 | return ForExternalRedeclaration; |
| 3975 | } |
| 3976 | |
| 3977 | /// The possible outcomes of name lookup for a literal operator. |
| 3978 | enum LiteralOperatorLookupResult { |
| 3979 | /// The lookup resulted in an error. |
| 3980 | LOLR_Error, |
| 3981 | /// The lookup found no match but no diagnostic was issued. |
| 3982 | LOLR_ErrorNoDiagnostic, |
| 3983 | /// The lookup found a single 'cooked' literal operator, which |
| 3984 |