20 #include "llvm/Support/ErrorHandling.h"
22 using namespace clang;
33 const Expr *falseExpr);
38 assert(!TR->
isReferenceType() &&
"Expressions can't have reference type.");
79 return Classification(
kind, modifiable);
105 llvm_unreachable(
"Invalid value category of implicit cast.");
114 #define ABSTRACT_STMT(Kind)
115 #define STMT(Kind, Base) case Expr::Kind##Class:
116 #define EXPR(Kind, Base)
117 #include "clang/AST/StmtNodes.inc"
118 llvm_unreachable(
"cannot classify a statement");
121 case Expr::ObjCIsaExprClass:
123 case Expr::StringLiteralClass:
125 case Expr::ObjCEncodeExprClass:
127 case Expr::PredefinedExprClass:
129 case Expr::ObjCSubscriptRefExprClass:
130 case Expr::ObjCPropertyRefExprClass:
132 case Expr::CXXTypeidExprClass:
133 case Expr::CXXUuidofExprClass:
136 case Expr::UnresolvedLookupExprClass:
137 case Expr::UnresolvedMemberExprClass:
138 case Expr::TypoExprClass:
139 case Expr::DependentCoawaitExprClass:
140 case Expr::CXXDependentScopeMemberExprClass:
141 case Expr::DependentScopeDeclRefExprClass:
144 case Expr::ObjCIvarRefExprClass:
145 case Expr::FunctionParmPackExprClass:
146 case Expr::MSPropertyRefExprClass:
147 case Expr::MSPropertySubscriptExprClass:
148 case Expr::OMPArraySectionExprClass:
149 case Expr::OMPArrayShapingExprClass:
150 case Expr::OMPIteratorExprClass:
155 case Expr::CompoundLiteralExprClass:
159 case Expr::CXXBoolLiteralExprClass:
160 case Expr::CXXPseudoDestructorExprClass:
161 case Expr::UnaryExprOrTypeTraitExprClass:
162 case Expr::CXXNewExprClass:
163 case Expr::CXXThisExprClass:
164 case Expr::CXXNullPtrLiteralExprClass:
165 case Expr::ImaginaryLiteralClass:
166 case Expr::GNUNullExprClass:
167 case Expr::OffsetOfExprClass:
168 case Expr::CXXThrowExprClass:
169 case Expr::ShuffleVectorExprClass:
170 case Expr::ConvertVectorExprClass:
171 case Expr::IntegerLiteralClass:
172 case Expr::FixedPointLiteralClass:
173 case Expr::CharacterLiteralClass:
174 case Expr::AddrLabelExprClass:
175 case Expr::CXXDeleteExprClass:
176 case Expr::ImplicitValueInitExprClass:
177 case Expr::BlockExprClass:
178 case Expr::FloatingLiteralClass:
179 case Expr::CXXNoexceptExprClass:
180 case Expr::CXXScalarValueInitExprClass:
181 case Expr::TypeTraitExprClass:
182 case Expr::ArrayTypeTraitExprClass:
183 case Expr::ExpressionTraitExprClass:
184 case Expr::ObjCSelectorExprClass:
185 case Expr::ObjCProtocolExprClass:
186 case Expr::ObjCStringLiteralClass:
187 case Expr::ObjCBoxedExprClass:
188 case Expr::ObjCArrayLiteralClass:
189 case Expr::ObjCDictionaryLiteralClass:
190 case Expr::ObjCBoolLiteralExprClass:
191 case Expr::ObjCAvailabilityCheckExprClass:
192 case Expr::ParenListExprClass:
193 case Expr::SizeOfPackExprClass:
194 case Expr::SubstNonTypeTemplateParmPackExprClass:
195 case Expr::AsTypeExprClass:
196 case Expr::ObjCIndirectCopyRestoreExprClass:
197 case Expr::AtomicExprClass:
198 case Expr::CXXFoldExprClass:
199 case Expr::ArrayInitLoopExprClass:
200 case Expr::ArrayInitIndexExprClass:
201 case Expr::NoInitExprClass:
202 case Expr::DesignatedInitUpdateExprClass:
203 case Expr::SourceLocExprClass:
204 case Expr::ConceptSpecializationExprClass:
205 case Expr::RequiresExprClass:
208 case Expr::ConstantExprClass:
212 case Expr::SubstNonTypeTemplateParmExprClass:
214 cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement());
220 case Expr::ArraySubscriptExprClass:
221 if (cast<ArraySubscriptExpr>(E)->getBase()->getType()->isVectorType())
223 if (Lang.CPlusPlus11) {
226 auto *
Base = cast<ArraySubscriptExpr>(E)->getBase()->IgnoreImpCasts();
227 if (
Base->getType()->isArrayType())
233 case Expr::MatrixSubscriptExprClass:
238 case Expr::DeclRefExprClass:
240 return isa<FunctionDecl>(cast<DeclRefExpr>(E)->getDecl())
242 return ClassifyDecl(Ctx, cast<DeclRefExpr>(E)->getDecl());
245 case Expr::MemberExprClass:
248 case Expr::UnaryOperatorClass:
249 switch (cast<UnaryOperator>(E)->getOpcode()) {
268 if (isa<ObjCPropertyRefExpr>(Op))
284 case Expr::RecoveryExprClass:
285 case Expr::OpaqueValueExprClass:
289 case Expr::PseudoObjectExprClass:
291 cast<PseudoObjectExpr>(E)->getValueKind());
295 case Expr::ImplicitCastExprClass:
300 case Expr::ParenExprClass:
306 case Expr::GenericSelectionExprClass:
307 if (cast<GenericSelectionExpr>(E)->isResultDependent())
309 return ClassifyInternal(Ctx,cast<GenericSelectionExpr>(E)->getResultExpr());
311 case Expr::BinaryOperatorClass:
312 case Expr::CompoundAssignOperatorClass:
318 case Expr::CallExprClass:
319 case Expr::CXXOperatorCallExprClass:
320 case Expr::CXXMemberCallExprClass:
321 case Expr::UserDefinedLiteralClass:
322 case Expr::CUDAKernelCallExprClass:
323 return ClassifyUnnamed(Ctx, cast<CallExpr>(E)->getCallReturnType(Ctx));
325 case Expr::CXXRewrittenBinaryOperatorClass:
327 Ctx, cast<CXXRewrittenBinaryOperator>(E)->getSemanticForm());
330 case Expr::ChooseExprClass:
335 case Expr::ExtVectorElementExprClass:
336 if (cast<ExtVectorElementExpr>(E)->containsDuplicateElements())
338 if (cast<ExtVectorElementExpr>(E)->isArrow())
343 case Expr::CXXDefaultArgExprClass:
347 case Expr::CXXDefaultInitExprClass:
351 case Expr::CXXBindTemporaryExprClass:
355 case Expr::ExprWithCleanupsClass:
359 case Expr::CStyleCastExprClass:
360 case Expr::CXXFunctionalCastExprClass:
361 case Expr::CXXStaticCastExprClass:
362 case Expr::CXXDynamicCastExprClass:
363 case Expr::CXXReinterpretCastExprClass:
364 case Expr::CXXConstCastExprClass:
365 case Expr::CXXAddrspaceCastExprClass:
366 case Expr::ObjCBridgedCastExprClass:
367 case Expr::BuiltinBitCastExprClass:
370 return ClassifyUnnamed(Ctx, cast<ExplicitCastExpr>(E)->getTypeAsWritten());
372 case Expr::CXXUnresolvedConstructExprClass:
374 cast<CXXUnresolvedConstructExpr>(E)->getTypeAsWritten());
376 case Expr::BinaryConditionalOperatorClass: {
378 const auto *co = cast<BinaryConditionalOperator>(E);
382 case Expr::ConditionalOperatorClass: {
385 const auto *co = cast<ConditionalOperator>(E);
391 case Expr::ObjCMessageExprClass:
393 cast<ObjCMessageExpr>(E)->getMethodDecl()) {
400 case Expr::CXXConstructExprClass:
401 case Expr::CXXInheritedCtorInitExprClass:
402 case Expr::CXXTemporaryObjectExprClass:
403 case Expr::LambdaExprClass:
404 case Expr::CXXStdInitializerListExprClass:
407 case Expr::VAArgExprClass:
410 case Expr::DesignatedInitExprClass:
413 case Expr::StmtExprClass: {
414 const CompoundStmt *S = cast<StmtExpr>(E)->getSubStmt();
415 if (
const auto *LastExpr = dyn_cast_or_null<Expr>(S->body_back()))
420 case Expr::PackExpansionExprClass:
423 case Expr::MaterializeTemporaryExprClass:
424 return cast<MaterializeTemporaryExpr>(E)->isBoundToLvalueReference()
428 case Expr::InitListExprClass:
435 assert(cast<InitListExpr>(E)->getNumInits() == 1 &&
436 "Only 1-element init lists can be glvalues.");
439 case Expr::CoawaitExprClass:
440 case Expr::CoyieldExprClass:
441 return ClassifyInternal(Ctx, cast<CoroutineSuspendExpr>(E)->getResumeExpr());
442 case Expr::SYCLUniqueStableNameExprClass:
447 llvm_unreachable(
"unhandled expression kind in classification");
460 if (isa<CXXMethodDecl>(D) && cast<CXXMethodDecl>(D)->isInstance())
464 if (
const auto *NTTParm = dyn_cast<NonTypeTemplateParmDecl>(D))
465 islvalue = NTTParm->getType()->isReferenceType() ||
466 NTTParm->getType()->isRecordType();
472 (isa<FunctionDecl, MSPropertyDecl, FunctionTemplateDecl>(D)));
511 if (isa<ObjCPropertyRefExpr>(
Base))
520 if (
const auto *
Value = dyn_cast<ValueDecl>(
Member))
521 if (
Value->getType()->isReferenceType())
526 if (isa<VarDecl>(
Member) &&
Member->getDeclContext()->isRecord())
532 if (isa<FieldDecl>(
Member)) {
537 if (isa<ObjCPropertyRefExpr>(
Base))
546 if (
const auto *Method = dyn_cast<CXXMethodDecl>(
Member))
556 "This is only relevant for C++.");
592 "This is only relevant for C++.");
603 if (
const Expr *NonThrow = TrueIsThrow ? (FalseIsThrow ?
nullptr : False)
604 : (FalseIsThrow ? True :
nullptr))
628 if (
const auto *CE = dyn_cast<ExplicitCastExpr>(E->
IgnoreParens())) {
629 if (CE->getSubExpr()->IgnoreParenImpCasts()->isLValue()) {
630 Loc = CE->getExprLoc();
645 if (
const auto *
Expr = dyn_cast<ObjCPropertyRefExpr>(E)) {
646 if (
Expr->isImplicitProperty() &&
647 Expr->getImplicitPropertySetter() ==
nullptr)
660 if (CT->isArrayType())
663 if (CT->isIncompleteType())
668 if (R->hasConstFields())
690 llvm_unreachable(
"Unhandled kind");
717 case Cl::CM_RValue: llvm_unreachable(
"CM_RValue and CL_LValue don't match");
720 llvm_unreachable(
"CM_LValueCast and CL_LValue don't match");
728 llvm_unreachable(
"Unhandled modifiable type");