1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/Expr.h"
15 #include "clang/AST/ExprCXX.h"
16 #include "clang/AST/APValue.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclCXX.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/RecordLayout.h"
22 #include "clang/AST/StmtVisitor.h"
23 #include "clang/Lex/LiteralSupport.h"
24 #include "clang/Lex/Lexer.h"
25 #include "clang/Sema/SemaDiagnostic.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/raw_ostream.h"
32 using namespace clang;
34 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
35 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
36 /// but also int expressions which are produced by things like comparisons in
38 bool Expr::isKnownToHaveBooleanValue() const {
39 const Expr *E = IgnoreParens();
41 // If this value has _Bool type, it is obvious 0/1.
42 if (E->getType()->isBooleanType()) return true;
43 // If this is a non-scalar-integer type, we don't care enough to try.
44 if (!E->getType()->isIntegralOrEnumerationType()) return false;
46 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
47 switch (UO->getOpcode()) {
49 return UO->getSubExpr()->isKnownToHaveBooleanValue();
55 // Only look through implicit casts. If the user writes
56 // '(int) (a && b)' treat it as an arbitrary int.
57 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
58 return CE->getSubExpr()->isKnownToHaveBooleanValue();
60 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
61 switch (BO->getOpcode()) {
62 default: return false;
63 case BO_LT: // Relational operators.
67 case BO_EQ: // Equality operators.
69 case BO_LAnd: // AND operator.
70 case BO_LOr: // Logical OR operator.
73 case BO_And: // Bitwise AND operator.
74 case BO_Xor: // Bitwise XOR operator.
75 case BO_Or: // Bitwise OR operator.
76 // Handle things like (x==2)|(y==12).
77 return BO->getLHS()->isKnownToHaveBooleanValue() &&
78 BO->getRHS()->isKnownToHaveBooleanValue();
82 return BO->getRHS()->isKnownToHaveBooleanValue();
86 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
87 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
88 CO->getFalseExpr()->isKnownToHaveBooleanValue();
93 // Amusing macro metaprogramming hack: check whether a class provides
94 // a more specific implementation of getExprLoc().
96 /// This implementation is used when a class provides a custom
97 /// implementation of getExprLoc.
98 template <class E, class T>
99 SourceLocation getExprLocImpl(const Expr *expr,
100 SourceLocation (T::*v)() const) {
101 return static_cast<const E*>(expr)->getExprLoc();
104 /// This implementation is used when a class doesn't provide
105 /// a custom implementation of getExprLoc. Overload resolution
106 /// should pick it over the implementation above because it's
107 /// more specialized according to function template partial ordering.
109 SourceLocation getExprLocImpl(const Expr *expr,
110 SourceLocation (Expr::*v)() const) {
111 return static_cast<const E*>(expr)->getSourceRange().getBegin();
115 SourceLocation Expr::getExprLoc() const {
116 switch (getStmtClass()) {
117 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
118 #define ABSTRACT_STMT(type)
119 #define STMT(type, base) \
120 case Stmt::type##Class: llvm_unreachable(#type " is not an Expr"); break;
121 #define EXPR(type, base) \
122 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
123 #include "clang/AST/StmtNodes.inc"
125 llvm_unreachable("unknown statement kind");
126 return SourceLocation();
129 //===----------------------------------------------------------------------===//
130 // Primary Expressions.
131 //===----------------------------------------------------------------------===//
133 /// \brief Compute the type-, value-, and instantiation-dependence of a
134 /// declaration reference
135 /// based on the declaration being referenced.
136 static void computeDeclRefDependence(NamedDecl *D, QualType T,
138 bool &ValueDependent,
139 bool &InstantiationDependent) {
140 TypeDependent = false;
141 ValueDependent = false;
142 InstantiationDependent = false;
144 // (TD) C++ [temp.dep.expr]p3:
145 // An id-expression is type-dependent if it contains:
149 // (VD) C++ [temp.dep.constexpr]p2:
150 // An identifier is value-dependent if it is:
152 // (TD) - an identifier that was declared with dependent type
153 // (VD) - a name declared with a dependent type,
154 if (T->isDependentType()) {
155 TypeDependent = true;
156 ValueDependent = true;
157 InstantiationDependent = true;
159 } else if (T->isInstantiationDependentType()) {
160 InstantiationDependent = true;
163 // (TD) - a conversion-function-id that specifies a dependent type
164 if (D->getDeclName().getNameKind()
165 == DeclarationName::CXXConversionFunctionName) {
166 QualType T = D->getDeclName().getCXXNameType();
167 if (T->isDependentType()) {
168 TypeDependent = true;
169 ValueDependent = true;
170 InstantiationDependent = true;
174 if (T->isInstantiationDependentType())
175 InstantiationDependent = true;
178 // (VD) - the name of a non-type template parameter,
179 if (isa<NonTypeTemplateParmDecl>(D)) {
180 ValueDependent = true;
181 InstantiationDependent = true;
185 // (VD) - a constant with integral or enumeration type and is
186 // initialized with an expression that is value-dependent.
187 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
188 if (Var->getType()->isIntegralOrEnumerationType() &&
189 Var->getType().getCVRQualifiers() == Qualifiers::Const) {
190 if (const Expr *Init = Var->getAnyInitializer())
191 if (Init->isValueDependent()) {
192 ValueDependent = true;
193 InstantiationDependent = true;
197 // (VD) - FIXME: Missing from the standard:
198 // - a member function or a static data member of the current
200 else if (Var->isStaticDataMember() &&
201 Var->getDeclContext()->isDependentContext()) {
202 ValueDependent = true;
203 InstantiationDependent = true;
209 // (VD) - FIXME: Missing from the standard:
210 // - a member function or a static data member of the current
212 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
213 ValueDependent = true;
214 InstantiationDependent = true;
219 void DeclRefExpr::computeDependence() {
220 bool TypeDependent = false;
221 bool ValueDependent = false;
222 bool InstantiationDependent = false;
223 computeDeclRefDependence(getDecl(), getType(), TypeDependent, ValueDependent,
224 InstantiationDependent);
226 // (TD) C++ [temp.dep.expr]p3:
227 // An id-expression is type-dependent if it contains:
231 // (VD) C++ [temp.dep.constexpr]p2:
232 // An identifier is value-dependent if it is:
233 if (!TypeDependent && !ValueDependent &&
234 hasExplicitTemplateArgs() &&
235 TemplateSpecializationType::anyDependentTemplateArguments(
237 getNumTemplateArgs(),
238 InstantiationDependent)) {
239 TypeDependent = true;
240 ValueDependent = true;
241 InstantiationDependent = true;
244 ExprBits.TypeDependent = TypeDependent;
245 ExprBits.ValueDependent = ValueDependent;
246 ExprBits.InstantiationDependent = InstantiationDependent;
248 // Is the declaration a parameter pack?
249 if (getDecl()->isParameterPack())
250 ExprBits.ContainsUnexpandedParameterPack = true;
253 DeclRefExpr::DeclRefExpr(NestedNameSpecifierLoc QualifierLoc,
254 ValueDecl *D, const DeclarationNameInfo &NameInfo,
256 const TemplateArgumentListInfo *TemplateArgs,
257 QualType T, ExprValueKind VK)
258 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
259 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
260 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
262 getInternalQualifierLoc() = QualifierLoc;
263 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
265 getInternalFoundDecl() = FoundD;
266 DeclRefExprBits.HasExplicitTemplateArgs = TemplateArgs ? 1 : 0;
268 bool Dependent = false;
269 bool InstantiationDependent = false;
270 bool ContainsUnexpandedParameterPack = false;
271 getExplicitTemplateArgs().initializeFrom(*TemplateArgs, Dependent,
272 InstantiationDependent,
273 ContainsUnexpandedParameterPack);
274 if (InstantiationDependent)
275 setInstantiationDependent(true);
277 DeclRefExprBits.HadMultipleCandidates = 0;
282 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context,
283 NestedNameSpecifierLoc QualifierLoc,
285 SourceLocation NameLoc,
289 const TemplateArgumentListInfo *TemplateArgs) {
290 return Create(Context, QualifierLoc, D,
291 DeclarationNameInfo(D->getDeclName(), NameLoc),
292 T, VK, FoundD, TemplateArgs);
295 DeclRefExpr *DeclRefExpr::Create(ASTContext &Context,
296 NestedNameSpecifierLoc QualifierLoc,
298 const DeclarationNameInfo &NameInfo,
302 const TemplateArgumentListInfo *TemplateArgs) {
303 // Filter out cases where the found Decl is the same as the value refenenced.
307 std::size_t Size = sizeof(DeclRefExpr);
308 if (QualifierLoc != 0)
309 Size += sizeof(NestedNameSpecifierLoc);
311 Size += sizeof(NamedDecl *);
313 Size += ASTTemplateArgumentListInfo::sizeFor(*TemplateArgs);
315 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
316 return new (Mem) DeclRefExpr(QualifierLoc, D, NameInfo, FoundD, TemplateArgs,
320 DeclRefExpr *DeclRefExpr::CreateEmpty(ASTContext &Context,
323 bool HasExplicitTemplateArgs,
324 unsigned NumTemplateArgs) {
325 std::size_t Size = sizeof(DeclRefExpr);
327 Size += sizeof(NestedNameSpecifierLoc);
329 Size += sizeof(NamedDecl *);
330 if (HasExplicitTemplateArgs)
331 Size += ASTTemplateArgumentListInfo::sizeFor(NumTemplateArgs);
333 void *Mem = Context.Allocate(Size, llvm::alignOf<DeclRefExpr>());
334 return new (Mem) DeclRefExpr(EmptyShell());
337 SourceRange DeclRefExpr::getSourceRange() const {
338 SourceRange R = getNameInfo().getSourceRange();
340 R.setBegin(getQualifierLoc().getBeginLoc());
341 if (hasExplicitTemplateArgs())
342 R.setEnd(getRAngleLoc());
346 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
347 // expr" policy instead.
348 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
349 ASTContext &Context = CurrentDecl->getASTContext();
351 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
352 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual)
353 return FD->getNameAsString();
355 llvm::SmallString<256> Name;
356 llvm::raw_svector_ostream Out(Name);
358 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
359 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
365 PrintingPolicy Policy(Context.getLangOptions());
367 std::string Proto = FD->getQualifiedNameAsString(Policy);
369 const FunctionType *AFT = FD->getType()->getAs<FunctionType>();
370 const FunctionProtoType *FT = 0;
371 if (FD->hasWrittenPrototype())
372 FT = dyn_cast<FunctionProtoType>(AFT);
376 llvm::raw_string_ostream POut(Proto);
377 for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) {
380 FD->getParamDecl(i)->getType().getAsStringInternal(Param, Policy);
384 if (FT->isVariadic()) {
385 if (FD->getNumParams()) POut << ", ";
391 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
392 Qualifiers ThisQuals = Qualifiers::fromCVRMask(MD->getTypeQualifiers());
393 if (ThisQuals.hasConst())
395 if (ThisQuals.hasVolatile())
396 Proto += " volatile";
399 if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
400 AFT->getResultType().getAsStringInternal(Proto, Policy);
405 return Name.str().str();
407 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
408 llvm::SmallString<256> Name;
409 llvm::raw_svector_ostream Out(Name);
410 Out << (MD->isInstanceMethod() ? '-' : '+');
413 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
414 // a null check to avoid a crash.
415 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
418 if (const ObjCCategoryImplDecl *CID =
419 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
420 Out << '(' << CID << ')';
423 Out << MD->getSelector().getAsString();
427 return Name.str().str();
429 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
430 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
436 void APNumericStorage::setIntValue(ASTContext &C, const llvm::APInt &Val) {
440 BitWidth = Val.getBitWidth();
441 unsigned NumWords = Val.getNumWords();
442 const uint64_t* Words = Val.getRawData();
444 pVal = new (C) uint64_t[NumWords];
445 std::copy(Words, Words + NumWords, pVal);
446 } else if (NumWords == 1)
453 IntegerLiteral::Create(ASTContext &C, const llvm::APInt &V,
454 QualType type, SourceLocation l) {
455 return new (C) IntegerLiteral(C, V, type, l);
459 IntegerLiteral::Create(ASTContext &C, EmptyShell Empty) {
460 return new (C) IntegerLiteral(Empty);
464 FloatingLiteral::Create(ASTContext &C, const llvm::APFloat &V,
465 bool isexact, QualType Type, SourceLocation L) {
466 return new (C) FloatingLiteral(C, V, isexact, Type, L);
470 FloatingLiteral::Create(ASTContext &C, EmptyShell Empty) {
471 return new (C) FloatingLiteral(Empty);
474 /// getValueAsApproximateDouble - This returns the value as an inaccurate
475 /// double. Note that this may cause loss of precision, but is useful for
476 /// debugging dumps, etc.
477 double FloatingLiteral::getValueAsApproximateDouble() const {
478 llvm::APFloat V = getValue();
480 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
482 return V.convertToDouble();
485 StringLiteral *StringLiteral::Create(ASTContext &C, StringRef Str,
486 StringKind Kind, bool Pascal, QualType Ty,
487 const SourceLocation *Loc,
489 // Allocate enough space for the StringLiteral plus an array of locations for
490 // any concatenated string tokens.
491 void *Mem = C.Allocate(sizeof(StringLiteral)+
492 sizeof(SourceLocation)*(NumStrs-1),
493 llvm::alignOf<StringLiteral>());
494 StringLiteral *SL = new (Mem) StringLiteral(Ty);
496 // OPTIMIZE: could allocate this appended to the StringLiteral.
497 char *AStrData = new (C, 1) char[Str.size()];
498 memcpy(AStrData, Str.data(), Str.size());
499 SL->StrData = AStrData;
500 SL->ByteLength = Str.size();
502 SL->IsPascal = Pascal;
503 SL->TokLocs[0] = Loc[0];
504 SL->NumConcatenated = NumStrs;
507 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
511 StringLiteral *StringLiteral::CreateEmpty(ASTContext &C, unsigned NumStrs) {
512 void *Mem = C.Allocate(sizeof(StringLiteral)+
513 sizeof(SourceLocation)*(NumStrs-1),
514 llvm::alignOf<StringLiteral>());
515 StringLiteral *SL = new (Mem) StringLiteral(QualType());
518 SL->NumConcatenated = NumStrs;
522 void StringLiteral::setString(ASTContext &C, StringRef Str) {
523 char *AStrData = new (C, 1) char[Str.size()];
524 memcpy(AStrData, Str.data(), Str.size());
526 ByteLength = Str.size();
529 /// getLocationOfByte - Return a source location that points to the specified
530 /// byte of this string literal.
532 /// Strings are amazingly complex. They can be formed from multiple tokens and
533 /// can have escape sequences in them in addition to the usual trigraph and
534 /// escaped newline business. This routine handles this complexity.
536 SourceLocation StringLiteral::
537 getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
538 const LangOptions &Features, const TargetInfo &Target) const {
539 assert(Kind == StringLiteral::Ascii && "This only works for ASCII strings");
541 // Loop over all of the tokens in this string until we find the one that
542 // contains the byte we're looking for.
545 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
546 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
548 // Get the spelling of the string so that we can get the data that makes up
549 // the string literal, not the identifier for the macro it is potentially
551 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
553 // Re-lex the token to get its length and original spelling.
554 std::pair<FileID, unsigned> LocInfo =SM.getDecomposedLoc(StrTokSpellingLoc);
555 bool Invalid = false;
556 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
558 return StrTokSpellingLoc;
560 const char *StrData = Buffer.data()+LocInfo.second;
562 // Create a langops struct and enable trigraphs. This is sufficient for
564 LangOptions LangOpts;
565 LangOpts.Trigraphs = true;
567 // Create a lexer starting at the beginning of this token.
568 Lexer TheLexer(StrTokSpellingLoc, Features, Buffer.begin(), StrData,
571 TheLexer.LexFromRawLexer(TheTok);
573 // Use the StringLiteralParser to compute the length of the string in bytes.
574 StringLiteralParser SLP(&TheTok, 1, SM, Features, Target);
575 unsigned TokNumBytes = SLP.GetStringLength();
577 // If the byte is in this token, return the location of the byte.
578 if (ByteNo < TokNumBytes ||
579 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
580 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
582 // Now that we know the offset of the token in the spelling, use the
583 // preprocessor to get the offset in the original source.
584 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
587 // Move to the next string token.
589 ByteNo -= TokNumBytes;
595 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
596 /// corresponds to, e.g. "sizeof" or "[pre]++".
597 const char *UnaryOperator::getOpcodeStr(Opcode Op) {
599 default: llvm_unreachable("Unknown unary operator");
600 case UO_PostInc: return "++";
601 case UO_PostDec: return "--";
602 case UO_PreInc: return "++";
603 case UO_PreDec: return "--";
604 case UO_AddrOf: return "&";
605 case UO_Deref: return "*";
606 case UO_Plus: return "+";
607 case UO_Minus: return "-";
608 case UO_Not: return "~";
609 case UO_LNot: return "!";
610 case UO_Real: return "__real";
611 case UO_Imag: return "__imag";
612 case UO_Extension: return "__extension__";
617 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
619 default: llvm_unreachable("No unary operator for overloaded function");
620 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
621 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
622 case OO_Amp: return UO_AddrOf;
623 case OO_Star: return UO_Deref;
624 case OO_Plus: return UO_Plus;
625 case OO_Minus: return UO_Minus;
626 case OO_Tilde: return UO_Not;
627 case OO_Exclaim: return UO_LNot;
631 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
633 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
634 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
635 case UO_AddrOf: return OO_Amp;
636 case UO_Deref: return OO_Star;
637 case UO_Plus: return OO_Plus;
638 case UO_Minus: return OO_Minus;
639 case UO_Not: return OO_Tilde;
640 case UO_LNot: return OO_Exclaim;
641 default: return OO_None;
646 //===----------------------------------------------------------------------===//
647 // Postfix Operators.
648 //===----------------------------------------------------------------------===//
650 CallExpr::CallExpr(ASTContext& C, StmtClass SC, Expr *fn, unsigned NumPreArgs,
651 Expr **args, unsigned numargs, QualType t, ExprValueKind VK,
652 SourceLocation rparenloc)
653 : Expr(SC, t, VK, OK_Ordinary,
654 fn->isTypeDependent(),
655 fn->isValueDependent(),
656 fn->isInstantiationDependent(),
657 fn->containsUnexpandedParameterPack()),
660 SubExprs = new (C) Stmt*[numargs+PREARGS_START+NumPreArgs];
662 for (unsigned i = 0; i != numargs; ++i) {
663 if (args[i]->isTypeDependent())
664 ExprBits.TypeDependent = true;
665 if (args[i]->isValueDependent())
666 ExprBits.ValueDependent = true;
667 if (args[i]->isInstantiationDependent())
668 ExprBits.InstantiationDependent = true;
669 if (args[i]->containsUnexpandedParameterPack())
670 ExprBits.ContainsUnexpandedParameterPack = true;
672 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
675 CallExprBits.NumPreArgs = NumPreArgs;
676 RParenLoc = rparenloc;
679 CallExpr::CallExpr(ASTContext& C, Expr *fn, Expr **args, unsigned numargs,
680 QualType t, ExprValueKind VK, SourceLocation rparenloc)
681 : Expr(CallExprClass, t, VK, OK_Ordinary,
682 fn->isTypeDependent(),
683 fn->isValueDependent(),
684 fn->isInstantiationDependent(),
685 fn->containsUnexpandedParameterPack()),
688 SubExprs = new (C) Stmt*[numargs+PREARGS_START];
690 for (unsigned i = 0; i != numargs; ++i) {
691 if (args[i]->isTypeDependent())
692 ExprBits.TypeDependent = true;
693 if (args[i]->isValueDependent())
694 ExprBits.ValueDependent = true;
695 if (args[i]->isInstantiationDependent())
696 ExprBits.InstantiationDependent = true;
697 if (args[i]->containsUnexpandedParameterPack())
698 ExprBits.ContainsUnexpandedParameterPack = true;
700 SubExprs[i+PREARGS_START] = args[i];
703 CallExprBits.NumPreArgs = 0;
704 RParenLoc = rparenloc;
707 CallExpr::CallExpr(ASTContext &C, StmtClass SC, EmptyShell Empty)
708 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
709 // FIXME: Why do we allocate this?
710 SubExprs = new (C) Stmt*[PREARGS_START];
711 CallExprBits.NumPreArgs = 0;
714 CallExpr::CallExpr(ASTContext &C, StmtClass SC, unsigned NumPreArgs,
716 : Expr(SC, Empty), SubExprs(0), NumArgs(0) {
717 // FIXME: Why do we allocate this?
718 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs];
719 CallExprBits.NumPreArgs = NumPreArgs;
722 Decl *CallExpr::getCalleeDecl() {
723 Expr *CEE = getCallee()->IgnoreParenImpCasts();
725 while (SubstNonTypeTemplateParmExpr *NTTP
726 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
727 CEE = NTTP->getReplacement()->IgnoreParenCasts();
730 // If we're calling a dereference, look at the pointer instead.
731 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
732 if (BO->isPtrMemOp())
733 CEE = BO->getRHS()->IgnoreParenCasts();
734 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
735 if (UO->getOpcode() == UO_Deref)
736 CEE = UO->getSubExpr()->IgnoreParenCasts();
738 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
739 return DRE->getDecl();
740 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
741 return ME->getMemberDecl();
746 FunctionDecl *CallExpr::getDirectCallee() {
747 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
750 /// setNumArgs - This changes the number of arguments present in this call.
751 /// Any orphaned expressions are deleted by this, and any new operands are set
753 void CallExpr::setNumArgs(ASTContext& C, unsigned NumArgs) {
754 // No change, just return.
755 if (NumArgs == getNumArgs()) return;
757 // If shrinking # arguments, just delete the extras and forgot them.
758 if (NumArgs < getNumArgs()) {
759 this->NumArgs = NumArgs;
763 // Otherwise, we are growing the # arguments. New an bigger argument array.
764 unsigned NumPreArgs = getNumPreArgs();
765 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
767 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
768 NewSubExprs[i] = SubExprs[i];
769 // Null out new args.
770 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
771 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
774 if (SubExprs) C.Deallocate(SubExprs);
775 SubExprs = NewSubExprs;
776 this->NumArgs = NumArgs;
779 /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If
781 unsigned CallExpr::isBuiltinCall(const ASTContext &Context) const {
782 // All simple function calls (e.g. func()) are implicitly cast to pointer to
783 // function. As a result, we try and obtain the DeclRefExpr from the
785 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
786 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
789 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
793 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
797 if (!FDecl->getIdentifier())
800 return FDecl->getBuiltinID();
803 QualType CallExpr::getCallReturnType() const {
804 QualType CalleeType = getCallee()->getType();
805 if (const PointerType *FnTypePtr = CalleeType->getAs<PointerType>())
806 CalleeType = FnTypePtr->getPointeeType();
807 else if (const BlockPointerType *BPT = CalleeType->getAs<BlockPointerType>())
808 CalleeType = BPT->getPointeeType();
809 else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember))
810 // This should never be overloaded and so should never return null.
811 CalleeType = Expr::findBoundMemberType(getCallee());
813 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
814 return FnType->getResultType();
817 SourceRange CallExpr::getSourceRange() const {
818 if (isa<CXXOperatorCallExpr>(this))
819 return cast<CXXOperatorCallExpr>(this)->getSourceRange();
821 SourceLocation begin = getCallee()->getLocStart();
822 if (begin.isInvalid() && getNumArgs() > 0)
823 begin = getArg(0)->getLocStart();
824 SourceLocation end = getRParenLoc();
825 if (end.isInvalid() && getNumArgs() > 0)
826 end = getArg(getNumArgs() - 1)->getLocEnd();
827 return SourceRange(begin, end);
830 OffsetOfExpr *OffsetOfExpr::Create(ASTContext &C, QualType type,
831 SourceLocation OperatorLoc,
833 OffsetOfNode* compsPtr, unsigned numComps,
834 Expr** exprsPtr, unsigned numExprs,
835 SourceLocation RParenLoc) {
836 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
837 sizeof(OffsetOfNode) * numComps +
838 sizeof(Expr*) * numExprs);
840 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, compsPtr, numComps,
841 exprsPtr, numExprs, RParenLoc);
844 OffsetOfExpr *OffsetOfExpr::CreateEmpty(ASTContext &C,
845 unsigned numComps, unsigned numExprs) {
846 void *Mem = C.Allocate(sizeof(OffsetOfExpr) +
847 sizeof(OffsetOfNode) * numComps +
848 sizeof(Expr*) * numExprs);
849 return new (Mem) OffsetOfExpr(numComps, numExprs);
852 OffsetOfExpr::OffsetOfExpr(ASTContext &C, QualType type,
853 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
854 OffsetOfNode* compsPtr, unsigned numComps,
855 Expr** exprsPtr, unsigned numExprs,
856 SourceLocation RParenLoc)
857 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
858 /*TypeDependent=*/false,
859 /*ValueDependent=*/tsi->getType()->isDependentType(),
860 tsi->getType()->isInstantiationDependentType(),
861 tsi->getType()->containsUnexpandedParameterPack()),
862 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
863 NumComps(numComps), NumExprs(numExprs)
865 for(unsigned i = 0; i < numComps; ++i) {
866 setComponent(i, compsPtr[i]);
869 for(unsigned i = 0; i < numExprs; ++i) {
870 if (exprsPtr[i]->isTypeDependent() || exprsPtr[i]->isValueDependent())
871 ExprBits.ValueDependent = true;
872 if (exprsPtr[i]->containsUnexpandedParameterPack())
873 ExprBits.ContainsUnexpandedParameterPack = true;
875 setIndexExpr(i, exprsPtr[i]);
879 IdentifierInfo *OffsetOfExpr::OffsetOfNode::getFieldName() const {
880 assert(getKind() == Field || getKind() == Identifier);
881 if (getKind() == Field)
882 return getField()->getIdentifier();
884 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
887 MemberExpr *MemberExpr::Create(ASTContext &C, Expr *base, bool isarrow,
888 NestedNameSpecifierLoc QualifierLoc,
889 ValueDecl *memberdecl,
890 DeclAccessPair founddecl,
891 DeclarationNameInfo nameinfo,
892 const TemplateArgumentListInfo *targs,
896 std::size_t Size = sizeof(MemberExpr);
898 bool hasQualOrFound = (QualifierLoc ||
899 founddecl.getDecl() != memberdecl ||
900 founddecl.getAccess() != memberdecl->getAccess());
902 Size += sizeof(MemberNameQualifier);
905 Size += ASTTemplateArgumentListInfo::sizeFor(*targs);
907 void *Mem = C.Allocate(Size, llvm::alignOf<MemberExpr>());
908 MemberExpr *E = new (Mem) MemberExpr(base, isarrow, memberdecl, nameinfo,
911 if (hasQualOrFound) {
912 // FIXME: Wrong. We should be looking at the member declaration we found.
913 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
914 E->setValueDependent(true);
915 E->setTypeDependent(true);
916 E->setInstantiationDependent(true);
918 else if (QualifierLoc &&
919 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
920 E->setInstantiationDependent(true);
922 E->HasQualifierOrFoundDecl = true;
924 MemberNameQualifier *NQ = E->getMemberQualifier();
925 NQ->QualifierLoc = QualifierLoc;
926 NQ->FoundDecl = founddecl;
930 bool Dependent = false;
931 bool InstantiationDependent = false;
932 bool ContainsUnexpandedParameterPack = false;
933 E->HasExplicitTemplateArgumentList = true;
934 E->getExplicitTemplateArgs().initializeFrom(*targs, Dependent,
935 InstantiationDependent,
936 ContainsUnexpandedParameterPack);
937 if (InstantiationDependent)
938 E->setInstantiationDependent(true);
944 SourceRange MemberExpr::getSourceRange() const {
945 SourceLocation StartLoc;
946 if (isImplicitAccess()) {
948 StartLoc = getQualifierLoc().getBeginLoc();
950 StartLoc = MemberLoc;
952 // FIXME: We don't want this to happen. Rather, we should be able to
953 // detect all kinds of implicit accesses more cleanly.
954 StartLoc = getBase()->getLocStart();
955 if (StartLoc.isInvalid())
956 StartLoc = MemberLoc;
959 SourceLocation EndLoc =
960 HasExplicitTemplateArgumentList? getRAngleLoc()
961 : getMemberNameInfo().getEndLoc();
963 return SourceRange(StartLoc, EndLoc);
966 void CastExpr::CheckCastConsistency() const {
967 switch (getCastKind()) {
968 case CK_DerivedToBase:
969 case CK_UncheckedDerivedToBase:
970 case CK_DerivedToBaseMemberPointer:
971 case CK_BaseToDerived:
972 case CK_BaseToDerivedMemberPointer:
973 assert(!path_empty() && "Cast kind should have a base path!");
976 case CK_CPointerToObjCPointerCast:
977 assert(getType()->isObjCObjectPointerType());
978 assert(getSubExpr()->getType()->isPointerType());
979 goto CheckNoBasePath;
981 case CK_BlockPointerToObjCPointerCast:
982 assert(getType()->isObjCObjectPointerType());
983 assert(getSubExpr()->getType()->isBlockPointerType());
984 goto CheckNoBasePath;
987 // Arbitrary casts to C pointer types count as bitcasts.
988 // Otherwise, we should only have block and ObjC pointer casts
989 // here if they stay within the type kind.
990 if (!getType()->isPointerType()) {
991 assert(getType()->isObjCObjectPointerType() ==
992 getSubExpr()->getType()->isObjCObjectPointerType());
993 assert(getType()->isBlockPointerType() ==
994 getSubExpr()->getType()->isBlockPointerType());
996 goto CheckNoBasePath;
998 case CK_AnyPointerToBlockPointerCast:
999 assert(getType()->isBlockPointerType());
1000 assert(getSubExpr()->getType()->isAnyPointerType() &&
1001 !getSubExpr()->getType()->isBlockPointerType());
1002 goto CheckNoBasePath;
1004 // These should not have an inheritance path.
1007 case CK_ArrayToPointerDecay:
1008 case CK_FunctionToPointerDecay:
1009 case CK_NullToMemberPointer:
1010 case CK_NullToPointer:
1011 case CK_ConstructorConversion:
1012 case CK_IntegralToPointer:
1013 case CK_PointerToIntegral:
1015 case CK_VectorSplat:
1016 case CK_IntegralCast:
1017 case CK_IntegralToFloating:
1018 case CK_FloatingToIntegral:
1019 case CK_FloatingCast:
1020 case CK_ObjCObjectLValueCast:
1021 case CK_FloatingRealToComplex:
1022 case CK_FloatingComplexToReal:
1023 case CK_FloatingComplexCast:
1024 case CK_FloatingComplexToIntegralComplex:
1025 case CK_IntegralRealToComplex:
1026 case CK_IntegralComplexToReal:
1027 case CK_IntegralComplexCast:
1028 case CK_IntegralComplexToFloatingComplex:
1029 case CK_ARCProduceObject:
1030 case CK_ARCConsumeObject:
1031 case CK_ARCReclaimReturnedObject:
1032 case CK_ARCExtendBlockObject:
1033 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1034 goto CheckNoBasePath;
1037 case CK_LValueToRValue:
1038 case CK_GetObjCProperty:
1040 case CK_PointerToBoolean:
1041 case CK_IntegralToBoolean:
1042 case CK_FloatingToBoolean:
1043 case CK_MemberPointerToBoolean:
1044 case CK_FloatingComplexToBoolean:
1045 case CK_IntegralComplexToBoolean:
1046 case CK_LValueBitCast: // -> bool&
1047 case CK_UserDefinedConversion: // operator bool()
1049 assert(path_empty() && "Cast kind should not have a base path!");
1054 const char *CastExpr::getCastKindName() const {
1055 switch (getCastKind()) {
1060 case CK_LValueBitCast:
1061 return "LValueBitCast";
1062 case CK_LValueToRValue:
1063 return "LValueToRValue";
1064 case CK_GetObjCProperty:
1065 return "GetObjCProperty";
1068 case CK_BaseToDerived:
1069 return "BaseToDerived";
1070 case CK_DerivedToBase:
1071 return "DerivedToBase";
1072 case CK_UncheckedDerivedToBase:
1073 return "UncheckedDerivedToBase";
1078 case CK_ArrayToPointerDecay:
1079 return "ArrayToPointerDecay";
1080 case CK_FunctionToPointerDecay:
1081 return "FunctionToPointerDecay";
1082 case CK_NullToMemberPointer:
1083 return "NullToMemberPointer";
1084 case CK_NullToPointer:
1085 return "NullToPointer";
1086 case CK_BaseToDerivedMemberPointer:
1087 return "BaseToDerivedMemberPointer";
1088 case CK_DerivedToBaseMemberPointer:
1089 return "DerivedToBaseMemberPointer";
1090 case CK_UserDefinedConversion:
1091 return "UserDefinedConversion";
1092 case CK_ConstructorConversion:
1093 return "ConstructorConversion";
1094 case CK_IntegralToPointer:
1095 return "IntegralToPointer";
1096 case CK_PointerToIntegral:
1097 return "PointerToIntegral";
1098 case CK_PointerToBoolean:
1099 return "PointerToBoolean";
1102 case CK_VectorSplat:
1103 return "VectorSplat";
1104 case CK_IntegralCast:
1105 return "IntegralCast";
1106 case CK_IntegralToBoolean:
1107 return "IntegralToBoolean";
1108 case CK_IntegralToFloating:
1109 return "IntegralToFloating";
1110 case CK_FloatingToIntegral:
1111 return "FloatingToIntegral";
1112 case CK_FloatingCast:
1113 return "FloatingCast";
1114 case CK_FloatingToBoolean:
1115 return "FloatingToBoolean";
1116 case CK_MemberPointerToBoolean:
1117 return "MemberPointerToBoolean";
1118 case CK_CPointerToObjCPointerCast:
1119 return "CPointerToObjCPointerCast";
1120 case CK_BlockPointerToObjCPointerCast:
1121 return "BlockPointerToObjCPointerCast";
1122 case CK_AnyPointerToBlockPointerCast:
1123 return "AnyPointerToBlockPointerCast";
1124 case CK_ObjCObjectLValueCast:
1125 return "ObjCObjectLValueCast";
1126 case CK_FloatingRealToComplex:
1127 return "FloatingRealToComplex";
1128 case CK_FloatingComplexToReal:
1129 return "FloatingComplexToReal";
1130 case CK_FloatingComplexToBoolean:
1131 return "FloatingComplexToBoolean";
1132 case CK_FloatingComplexCast:
1133 return "FloatingComplexCast";
1134 case CK_FloatingComplexToIntegralComplex:
1135 return "FloatingComplexToIntegralComplex";
1136 case CK_IntegralRealToComplex:
1137 return "IntegralRealToComplex";
1138 case CK_IntegralComplexToReal:
1139 return "IntegralComplexToReal";
1140 case CK_IntegralComplexToBoolean:
1141 return "IntegralComplexToBoolean";
1142 case CK_IntegralComplexCast:
1143 return "IntegralComplexCast";
1144 case CK_IntegralComplexToFloatingComplex:
1145 return "IntegralComplexToFloatingComplex";
1146 case CK_ARCConsumeObject:
1147 return "ARCConsumeObject";
1148 case CK_ARCProduceObject:
1149 return "ARCProduceObject";
1150 case CK_ARCReclaimReturnedObject:
1151 return "ARCReclaimReturnedObject";
1152 case CK_ARCExtendBlockObject:
1153 return "ARCCExtendBlockObject";
1156 llvm_unreachable("Unhandled cast kind!");
1160 Expr *CastExpr::getSubExprAsWritten() {
1164 SubExpr = E->getSubExpr();
1166 // Skip through reference binding to temporary.
1167 if (MaterializeTemporaryExpr *Materialize
1168 = dyn_cast<MaterializeTemporaryExpr>(SubExpr))
1169 SubExpr = Materialize->GetTemporaryExpr();
1171 // Skip any temporary bindings; they're implicit.
1172 if (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(SubExpr))
1173 SubExpr = Binder->getSubExpr();
1175 // Conversions by constructor and conversion functions have a
1176 // subexpression describing the call; strip it off.
1177 if (E->getCastKind() == CK_ConstructorConversion)
1178 SubExpr = cast<CXXConstructExpr>(SubExpr)->getArg(0);
1179 else if (E->getCastKind() == CK_UserDefinedConversion)
1180 SubExpr = cast<CXXMemberCallExpr>(SubExpr)->getImplicitObjectArgument();
1182 // If the subexpression we're left with is an implicit cast, look
1183 // through that, too.
1184 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1189 CXXBaseSpecifier **CastExpr::path_buffer() {
1190 switch (getStmtClass()) {
1191 #define ABSTRACT_STMT(x)
1192 #define CASTEXPR(Type, Base) \
1193 case Stmt::Type##Class: \
1194 return reinterpret_cast<CXXBaseSpecifier**>(static_cast<Type*>(this)+1);
1195 #define STMT(Type, Base)
1196 #include "clang/AST/StmtNodes.inc"
1198 llvm_unreachable("non-cast expressions not possible here");
1203 void CastExpr::setCastPath(const CXXCastPath &Path) {
1204 assert(Path.size() == path_size());
1205 memcpy(path_buffer(), Path.data(), Path.size() * sizeof(CXXBaseSpecifier*));
1208 ImplicitCastExpr *ImplicitCastExpr::Create(ASTContext &C, QualType T,
1209 CastKind Kind, Expr *Operand,
1210 const CXXCastPath *BasePath,
1212 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1214 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1215 ImplicitCastExpr *E =
1216 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1217 if (PathSize) E->setCastPath(*BasePath);
1221 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(ASTContext &C,
1222 unsigned PathSize) {
1224 C.Allocate(sizeof(ImplicitCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1225 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1229 CStyleCastExpr *CStyleCastExpr::Create(ASTContext &C, QualType T,
1230 ExprValueKind VK, CastKind K, Expr *Op,
1231 const CXXCastPath *BasePath,
1232 TypeSourceInfo *WrittenTy,
1233 SourceLocation L, SourceLocation R) {
1234 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1236 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1238 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1239 if (PathSize) E->setCastPath(*BasePath);
1243 CStyleCastExpr *CStyleCastExpr::CreateEmpty(ASTContext &C, unsigned PathSize) {
1245 C.Allocate(sizeof(CStyleCastExpr) + PathSize * sizeof(CXXBaseSpecifier*));
1246 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1249 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1250 /// corresponds to, e.g. "<<=".
1251 const char *BinaryOperator::getOpcodeStr(Opcode Op) {
1253 case BO_PtrMemD: return ".*";
1254 case BO_PtrMemI: return "->*";
1255 case BO_Mul: return "*";
1256 case BO_Div: return "/";
1257 case BO_Rem: return "%";
1258 case BO_Add: return "+";
1259 case BO_Sub: return "-";
1260 case BO_Shl: return "<<";
1261 case BO_Shr: return ">>";
1262 case BO_LT: return "<";
1263 case BO_GT: return ">";
1264 case BO_LE: return "<=";
1265 case BO_GE: return ">=";
1266 case BO_EQ: return "==";
1267 case BO_NE: return "!=";
1268 case BO_And: return "&";
1269 case BO_Xor: return "^";
1270 case BO_Or: return "|";
1271 case BO_LAnd: return "&&";
1272 case BO_LOr: return "||";
1273 case BO_Assign: return "=";
1274 case BO_MulAssign: return "*=";
1275 case BO_DivAssign: return "/=";
1276 case BO_RemAssign: return "%=";
1277 case BO_AddAssign: return "+=";
1278 case BO_SubAssign: return "-=";
1279 case BO_ShlAssign: return "<<=";
1280 case BO_ShrAssign: return ">>=";
1281 case BO_AndAssign: return "&=";
1282 case BO_XorAssign: return "^=";
1283 case BO_OrAssign: return "|=";
1284 case BO_Comma: return ",";
1291 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1293 default: llvm_unreachable("Not an overloadable binary operator");
1294 case OO_Plus: return BO_Add;
1295 case OO_Minus: return BO_Sub;
1296 case OO_Star: return BO_Mul;
1297 case OO_Slash: return BO_Div;
1298 case OO_Percent: return BO_Rem;
1299 case OO_Caret: return BO_Xor;
1300 case OO_Amp: return BO_And;
1301 case OO_Pipe: return BO_Or;
1302 case OO_Equal: return BO_Assign;
1303 case OO_Less: return BO_LT;
1304 case OO_Greater: return BO_GT;
1305 case OO_PlusEqual: return BO_AddAssign;
1306 case OO_MinusEqual: return BO_SubAssign;
1307 case OO_StarEqual: return BO_MulAssign;
1308 case OO_SlashEqual: return BO_DivAssign;
1309 case OO_PercentEqual: return BO_RemAssign;
1310 case OO_CaretEqual: return BO_XorAssign;
1311 case OO_AmpEqual: return BO_AndAssign;
1312 case OO_PipeEqual: return BO_OrAssign;
1313 case OO_LessLess: return BO_Shl;
1314 case OO_GreaterGreater: return BO_Shr;
1315 case OO_LessLessEqual: return BO_ShlAssign;
1316 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1317 case OO_EqualEqual: return BO_EQ;
1318 case OO_ExclaimEqual: return BO_NE;
1319 case OO_LessEqual: return BO_LE;
1320 case OO_GreaterEqual: return BO_GE;
1321 case OO_AmpAmp: return BO_LAnd;
1322 case OO_PipePipe: return BO_LOr;
1323 case OO_Comma: return BO_Comma;
1324 case OO_ArrowStar: return BO_PtrMemI;
1328 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1329 static const OverloadedOperatorKind OverOps[] = {
1330 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1331 OO_Star, OO_Slash, OO_Percent,
1333 OO_LessLess, OO_GreaterGreater,
1334 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1335 OO_EqualEqual, OO_ExclaimEqual,
1341 OO_Equal, OO_StarEqual,
1342 OO_SlashEqual, OO_PercentEqual,
1343 OO_PlusEqual, OO_MinusEqual,
1344 OO_LessLessEqual, OO_GreaterGreaterEqual,
1345 OO_AmpEqual, OO_CaretEqual,
1349 return OverOps[Opc];
1352 InitListExpr::InitListExpr(ASTContext &C, SourceLocation lbraceloc,
1353 Expr **initExprs, unsigned numInits,
1354 SourceLocation rbraceloc)
1355 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1357 InitExprs(C, numInits),
1358 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), SyntacticForm(0),
1359 HadArrayRangeDesignator(false)
1361 for (unsigned I = 0; I != numInits; ++I) {
1362 if (initExprs[I]->isTypeDependent())
1363 ExprBits.TypeDependent = true;
1364 if (initExprs[I]->isValueDependent())
1365 ExprBits.ValueDependent = true;
1366 if (initExprs[I]->isInstantiationDependent())
1367 ExprBits.InstantiationDependent = true;
1368 if (initExprs[I]->containsUnexpandedParameterPack())
1369 ExprBits.ContainsUnexpandedParameterPack = true;
1372 InitExprs.insert(C, InitExprs.end(), initExprs, initExprs+numInits);
1375 void InitListExpr::reserveInits(ASTContext &C, unsigned NumInits) {
1376 if (NumInits > InitExprs.size())
1377 InitExprs.reserve(C, NumInits);
1380 void InitListExpr::resizeInits(ASTContext &C, unsigned NumInits) {
1381 InitExprs.resize(C, NumInits, 0);
1384 Expr *InitListExpr::updateInit(ASTContext &C, unsigned Init, Expr *expr) {
1385 if (Init >= InitExprs.size()) {
1386 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, 0);
1387 InitExprs.back() = expr;
1391 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1392 InitExprs[Init] = expr;
1396 void InitListExpr::setArrayFiller(Expr *filler) {
1397 ArrayFillerOrUnionFieldInit = filler;
1398 // Fill out any "holes" in the array due to designated initializers.
1399 Expr **inits = getInits();
1400 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1405 SourceRange InitListExpr::getSourceRange() const {
1407 return SyntacticForm->getSourceRange();
1408 SourceLocation Beg = LBraceLoc, End = RBraceLoc;
1409 if (Beg.isInvalid()) {
1410 // Find the first non-null initializer.
1411 for (InitExprsTy::const_iterator I = InitExprs.begin(),
1412 E = InitExprs.end();
1415 Beg = S->getLocStart();
1420 if (End.isInvalid()) {
1421 // Find the first non-null initializer from the end.
1422 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
1423 E = InitExprs.rend();
1426 End = S->getSourceRange().getEnd();
1431 return SourceRange(Beg, End);
1434 /// getFunctionType - Return the underlying function type for this block.
1436 const FunctionType *BlockExpr::getFunctionType() const {
1437 return getType()->getAs<BlockPointerType>()->
1438 getPointeeType()->getAs<FunctionType>();
1441 SourceLocation BlockExpr::getCaretLocation() const {
1442 return TheBlock->getCaretLocation();
1444 const Stmt *BlockExpr::getBody() const {
1445 return TheBlock->getBody();
1447 Stmt *BlockExpr::getBody() {
1448 return TheBlock->getBody();
1452 //===----------------------------------------------------------------------===//
1453 // Generic Expression Routines
1454 //===----------------------------------------------------------------------===//
1456 /// isUnusedResultAWarning - Return true if this immediate expression should
1457 /// be warned about if the result is unused. If so, fill in Loc and Ranges
1458 /// with location to warn on and the source range[s] to report with the
1460 bool Expr::isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1,
1461 SourceRange &R2, ASTContext &Ctx) const {
1462 // Don't warn if the expr is type dependent. The type could end up
1463 // instantiating to void.
1464 if (isTypeDependent())
1467 switch (getStmtClass()) {
1469 if (getType()->isVoidType())
1472 R1 = getSourceRange();
1474 case ParenExprClass:
1475 return cast<ParenExpr>(this)->getSubExpr()->
1476 isUnusedResultAWarning(Loc, R1, R2, Ctx);
1477 case GenericSelectionExprClass:
1478 return cast<GenericSelectionExpr>(this)->getResultExpr()->
1479 isUnusedResultAWarning(Loc, R1, R2, Ctx);
1480 case UnaryOperatorClass: {
1481 const UnaryOperator *UO = cast<UnaryOperator>(this);
1483 switch (UO->getOpcode()) {
1488 case UO_PreDec: // ++/--
1489 return false; // Not a warning.
1491 // Dereferencing a volatile pointer is a side-effect.
1492 if (Ctx.getCanonicalType(getType()).isVolatileQualified())
1497 // accessing a piece of a volatile complex is a side-effect.
1498 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
1499 .isVolatileQualified())
1503 return UO->getSubExpr()->isUnusedResultAWarning(Loc, R1, R2, Ctx);
1505 Loc = UO->getOperatorLoc();
1506 R1 = UO->getSubExpr()->getSourceRange();
1509 case BinaryOperatorClass: {
1510 const BinaryOperator *BO = cast<BinaryOperator>(this);
1511 switch (BO->getOpcode()) {
1514 // Consider the RHS of comma for side effects. LHS was checked by
1515 // Sema::CheckCommaOperands.
1517 // ((foo = <blah>), 0) is an idiom for hiding the result (and
1518 // lvalue-ness) of an assignment written in a macro.
1519 if (IntegerLiteral *IE =
1520 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
1521 if (IE->getValue() == 0)
1523 return BO->getRHS()->isUnusedResultAWarning(Loc, R1, R2, Ctx);
1524 // Consider '||', '&&' to have side effects if the LHS or RHS does.
1527 if (!BO->getLHS()->isUnusedResultAWarning(Loc, R1, R2, Ctx) ||
1528 !BO->getRHS()->isUnusedResultAWarning(Loc, R1, R2, Ctx))
1532 if (BO->isAssignmentOp())
1534 Loc = BO->getOperatorLoc();
1535 R1 = BO->getLHS()->getSourceRange();
1536 R2 = BO->getRHS()->getSourceRange();
1539 case CompoundAssignOperatorClass:
1540 case VAArgExprClass:
1541 case AtomicExprClass:
1544 case ConditionalOperatorClass: {
1545 // If only one of the LHS or RHS is a warning, the operator might
1546 // be being used for control flow. Only warn if both the LHS and
1547 // RHS are warnings.
1548 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
1549 if (!Exp->getRHS()->isUnusedResultAWarning(Loc, R1, R2, Ctx))
1553 return Exp->getLHS()->isUnusedResultAWarning(Loc, R1, R2, Ctx);
1556 case MemberExprClass:
1557 // If the base pointer or element is to a volatile pointer/field, accessing
1558 // it is a side effect.
1559 if (Ctx.getCanonicalType(getType()).isVolatileQualified())
1561 Loc = cast<MemberExpr>(this)->getMemberLoc();
1562 R1 = SourceRange(Loc, Loc);
1563 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
1566 case ArraySubscriptExprClass:
1567 // If the base pointer or element is to a volatile pointer/field, accessing
1568 // it is a side effect.
1569 if (Ctx.getCanonicalType(getType()).isVolatileQualified())
1571 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
1572 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
1573 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
1576 case CXXOperatorCallExprClass: {
1577 // We warn about operator== and operator!= even when user-defined operator
1578 // overloads as there is no reasonable way to define these such that they
1579 // have non-trivial, desirable side-effects. See the -Wunused-comparison
1580 // warning: these operators are commonly typo'ed, and so warning on them
1581 // provides additional value as well. If this list is updated,
1582 // DiagnoseUnusedComparison should be as well.
1583 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
1584 if (Op->getOperator() == OO_EqualEqual ||
1585 Op->getOperator() == OO_ExclaimEqual) {
1586 Loc = Op->getOperatorLoc();
1587 R1 = Op->getSourceRange();
1591 // Fallthrough for generic call handling.
1594 case CXXMemberCallExprClass: {
1595 // If this is a direct call, get the callee.
1596 const CallExpr *CE = cast<CallExpr>(this);
1597 if (const Decl *FD = CE->getCalleeDecl()) {
1598 // If the callee has attribute pure, const, or warn_unused_result, warn
1599 // about it. void foo() { strlen("bar"); } should warn.
1601 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
1602 // updated to match for QoI.
1603 if (FD->getAttr<WarnUnusedResultAttr>() ||
1604 FD->getAttr<PureAttr>() || FD->getAttr<ConstAttr>()) {
1605 Loc = CE->getCallee()->getLocStart();
1606 R1 = CE->getCallee()->getSourceRange();
1608 if (unsigned NumArgs = CE->getNumArgs())
1609 R2 = SourceRange(CE->getArg(0)->getLocStart(),
1610 CE->getArg(NumArgs-1)->getLocEnd());
1617 case CXXTemporaryObjectExprClass:
1618 case CXXConstructExprClass:
1621 case ObjCMessageExprClass: {
1622 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
1623 if (Ctx.getLangOptions().ObjCAutoRefCount &&
1624 ME->isInstanceMessage() &&
1625 !ME->getType()->isVoidType() &&
1626 ME->getSelector().getIdentifierInfoForSlot(0) &&
1627 ME->getSelector().getIdentifierInfoForSlot(0)
1628 ->getName().startswith("init")) {
1630 R1 = ME->getSourceRange();
1634 const ObjCMethodDecl *MD = ME->getMethodDecl();
1635 if (MD && MD->getAttr<WarnUnusedResultAttr>()) {
1642 case ObjCPropertyRefExprClass:
1644 R1 = getSourceRange();
1647 case StmtExprClass: {
1648 // Statement exprs don't logically have side effects themselves, but are
1649 // sometimes used in macros in ways that give them a type that is unused.
1650 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
1651 // however, if the result of the stmt expr is dead, we don't want to emit a
1653 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
1654 if (!CS->body_empty()) {
1655 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
1656 return E->isUnusedResultAWarning(Loc, R1, R2, Ctx);
1657 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
1658 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
1659 return E->isUnusedResultAWarning(Loc, R1, R2, Ctx);
1662 if (getType()->isVoidType())
1664 Loc = cast<StmtExpr>(this)->getLParenLoc();
1665 R1 = getSourceRange();
1668 case CStyleCastExprClass:
1669 // If this is an explicit cast to void, allow it. People do this when they
1670 // think they know what they're doing :).
1671 if (getType()->isVoidType())
1673 Loc = cast<CStyleCastExpr>(this)->getLParenLoc();
1674 R1 = cast<CStyleCastExpr>(this)->getSubExpr()->getSourceRange();
1676 case CXXFunctionalCastExprClass: {
1677 if (getType()->isVoidType())
1679 const CastExpr *CE = cast<CastExpr>(this);
1681 // If this is a cast to void or a constructor conversion, check the operand.
1682 // Otherwise, the result of the cast is unused.
1683 if (CE->getCastKind() == CK_ToVoid ||
1684 CE->getCastKind() == CK_ConstructorConversion)
1685 return (cast<CastExpr>(this)->getSubExpr()
1686 ->isUnusedResultAWarning(Loc, R1, R2, Ctx));
1687 Loc = cast<CXXFunctionalCastExpr>(this)->getTypeBeginLoc();
1688 R1 = cast<CXXFunctionalCastExpr>(this)->getSubExpr()->getSourceRange();
1692 case ImplicitCastExprClass:
1693 // Check the operand, since implicit casts are inserted by Sema
1694 return (cast<ImplicitCastExpr>(this)
1695 ->getSubExpr()->isUnusedResultAWarning(Loc, R1, R2, Ctx));
1697 case CXXDefaultArgExprClass:
1698 return (cast<CXXDefaultArgExpr>(this)
1699 ->getExpr()->isUnusedResultAWarning(Loc, R1, R2, Ctx));
1701 case CXXNewExprClass:
1702 // FIXME: In theory, there might be new expressions that don't have side
1703 // effects (e.g. a placement new with an uninitialized POD).
1704 case CXXDeleteExprClass:
1706 case CXXBindTemporaryExprClass:
1707 return (cast<CXXBindTemporaryExpr>(this)
1708 ->getSubExpr()->isUnusedResultAWarning(Loc, R1, R2, Ctx));
1709 case ExprWithCleanupsClass:
1710 return (cast<ExprWithCleanups>(this)
1711 ->getSubExpr()->isUnusedResultAWarning(Loc, R1, R2, Ctx));
1715 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
1716 /// returns true, if it is; false otherwise.
1717 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
1718 const Expr *E = IgnoreParens();
1719 switch (E->getStmtClass()) {
1722 case ObjCIvarRefExprClass:
1724 case Expr::UnaryOperatorClass:
1725 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
1726 case ImplicitCastExprClass:
1727 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
1728 case MaterializeTemporaryExprClass:
1729 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
1730 ->isOBJCGCCandidate(Ctx);
1731 case CStyleCastExprClass:
1732 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
1733 case BlockDeclRefExprClass:
1734 case DeclRefExprClass: {
1737 if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E))
1738 D = BDRE->getDecl();
1740 D = cast<DeclRefExpr>(E)->getDecl();
1742 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
1743 if (VD->hasGlobalStorage())
1745 QualType T = VD->getType();
1746 // dereferencing to a pointer is always a gc'able candidate,
1747 // unless it is __weak.
1748 return T->isPointerType() &&
1749 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
1753 case MemberExprClass: {
1754 const MemberExpr *M = cast<MemberExpr>(E);
1755 return M->getBase()->isOBJCGCCandidate(Ctx);
1757 case ArraySubscriptExprClass:
1758 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
1762 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
1763 if (isTypeDependent())
1765 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
1768 QualType Expr::findBoundMemberType(const Expr *expr) {
1769 assert(expr->getType()->isSpecificPlaceholderType(BuiltinType::BoundMember));
1771 // Bound member expressions are always one of these possibilities:
1772 // x->m x.m x->*y x.*y
1773 // (possibly parenthesized)
1775 expr = expr->IgnoreParens();
1776 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
1777 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
1778 return mem->getMemberDecl()->getType();
1781 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
1782 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
1784 assert(type->isFunctionType());
1788 assert(isa<UnresolvedMemberExpr>(expr));
1792 static Expr::CanThrowResult MergeCanThrow(Expr::CanThrowResult CT1,
1793 Expr::CanThrowResult CT2) {
1794 // CanThrowResult constants are ordered so that the maximum is the correct
1796 return CT1 > CT2 ? CT1 : CT2;
1799 static Expr::CanThrowResult CanSubExprsThrow(ASTContext &C, const Expr *CE) {
1800 Expr *E = const_cast<Expr*>(CE);
1801 Expr::CanThrowResult R = Expr::CT_Cannot;
1802 for (Expr::child_range I = E->children(); I && R != Expr::CT_Can; ++I) {
1803 R = MergeCanThrow(R, cast<Expr>(*I)->CanThrow(C));
1808 static Expr::CanThrowResult CanCalleeThrow(ASTContext &Ctx, const Expr *E,
1810 bool NullThrows = true) {
1812 return NullThrows ? Expr::CT_Can : Expr::CT_Cannot;
1814 // See if we can get a function type from the decl somehow.
1815 const ValueDecl *VD = dyn_cast<ValueDecl>(D);
1816 if (!VD) // If we have no clue what we're calling, assume the worst.
1817 return Expr::CT_Can;
1819 // As an extension, we assume that __attribute__((nothrow)) functions don't
1821 if (isa<FunctionDecl>(D) && D->hasAttr<NoThrowAttr>())
1822 return Expr::CT_Cannot;
1824 QualType T = VD->getType();
1825 const FunctionProtoType *FT;
1826 if ((FT = T->getAs<FunctionProtoType>())) {
1827 } else if (const PointerType *PT = T->getAs<PointerType>())
1828 FT = PT->getPointeeType()->getAs<FunctionProtoType>();
1829 else if (const ReferenceType *RT = T->getAs<ReferenceType>())
1830 FT = RT->getPointeeType()->getAs<FunctionProtoType>();
1831 else if (const MemberPointerType *MT = T->getAs<MemberPointerType>())
1832 FT = MT->getPointeeType()->getAs<FunctionProtoType>();
1833 else if (const BlockPointerType *BT = T->getAs<BlockPointerType>())
1834 FT = BT->getPointeeType()->getAs<FunctionProtoType>();
1837 return Expr::CT_Can;
1839 if (FT->getExceptionSpecType() == EST_Delayed) {
1840 assert(isa<CXXConstructorDecl>(D) &&
1841 "only constructor exception specs can be unknown");
1842 Ctx.getDiagnostics().Report(E->getLocStart(),
1843 diag::err_exception_spec_unknown)
1844 << E->getSourceRange();
1845 return Expr::CT_Can;
1848 return FT->isNothrow(Ctx) ? Expr::CT_Cannot : Expr::CT_Can;
1851 static Expr::CanThrowResult CanDynamicCastThrow(const CXXDynamicCastExpr *DC) {
1852 if (DC->isTypeDependent())
1853 return Expr::CT_Dependent;
1855 if (!DC->getTypeAsWritten()->isReferenceType())
1856 return Expr::CT_Cannot;
1858 if (DC->getSubExpr()->isTypeDependent())
1859 return Expr::CT_Dependent;
1861 return DC->getCastKind() == clang::CK_Dynamic? Expr::CT_Can : Expr::CT_Cannot;
1864 static Expr::CanThrowResult CanTypeidThrow(ASTContext &C,
1865 const CXXTypeidExpr *DC) {
1866 if (DC->isTypeOperand())
1867 return Expr::CT_Cannot;
1869 Expr *Op = DC->getExprOperand();
1870 if (Op->isTypeDependent())
1871 return Expr::CT_Dependent;
1873 const RecordType *RT = Op->getType()->getAs<RecordType>();
1875 return Expr::CT_Cannot;
1877 if (!cast<CXXRecordDecl>(RT->getDecl())->isPolymorphic())
1878 return Expr::CT_Cannot;
1880 if (Op->Classify(C).isPRValue())
1881 return Expr::CT_Cannot;
1883 return Expr::CT_Can;
1886 Expr::CanThrowResult Expr::CanThrow(ASTContext &C) const {
1887 // C++ [expr.unary.noexcept]p3:
1888 // [Can throw] if in a potentially-evaluated context the expression would
1890 switch (getStmtClass()) {
1891 case CXXThrowExprClass:
1892 // - a potentially evaluated throw-expression
1895 case CXXDynamicCastExprClass: {
1896 // - a potentially evaluated dynamic_cast expression dynamic_cast<T>(v),
1897 // where T is a reference type, that requires a run-time check
1898 CanThrowResult CT = CanDynamicCastThrow(cast<CXXDynamicCastExpr>(this));
1901 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1904 case CXXTypeidExprClass:
1905 // - a potentially evaluated typeid expression applied to a glvalue
1906 // expression whose type is a polymorphic class type
1907 return CanTypeidThrow(C, cast<CXXTypeidExpr>(this));
1909 // - a potentially evaluated call to a function, member function, function
1910 // pointer, or member function pointer that does not have a non-throwing
1911 // exception-specification
1913 case CXXOperatorCallExprClass:
1914 case CXXMemberCallExprClass: {
1915 const CallExpr *CE = cast<CallExpr>(this);
1917 if (isTypeDependent())
1919 else if (isa<CXXPseudoDestructorExpr>(CE->getCallee()->IgnoreParens()))
1922 CT = CanCalleeThrow(C, this, CE->getCalleeDecl());
1925 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1928 case CXXConstructExprClass:
1929 case CXXTemporaryObjectExprClass: {
1930 CanThrowResult CT = CanCalleeThrow(C, this,
1931 cast<CXXConstructExpr>(this)->getConstructor());
1934 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1937 case CXXNewExprClass: {
1939 if (isTypeDependent())
1943 CanCalleeThrow(C, this, cast<CXXNewExpr>(this)->getOperatorNew()),
1944 CanCalleeThrow(C, this, cast<CXXNewExpr>(this)->getConstructor(),
1945 /*NullThrows*/false));
1948 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1951 case CXXDeleteExprClass: {
1953 QualType DTy = cast<CXXDeleteExpr>(this)->getDestroyedType();
1954 if (DTy.isNull() || DTy->isDependentType()) {
1957 CT = CanCalleeThrow(C, this,
1958 cast<CXXDeleteExpr>(this)->getOperatorDelete());
1959 if (const RecordType *RT = DTy->getAs<RecordType>()) {
1960 const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
1961 CT = MergeCanThrow(CT, CanCalleeThrow(C, this, RD->getDestructor()));
1966 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1969 case CXXBindTemporaryExprClass: {
1970 // The bound temporary has to be destroyed again, which might throw.
1971 CanThrowResult CT = CanCalleeThrow(C, this,
1972 cast<CXXBindTemporaryExpr>(this)->getTemporary()->getDestructor());
1975 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
1978 // ObjC message sends are like function calls, but never have exception
1980 case ObjCMessageExprClass:
1981 case ObjCPropertyRefExprClass:
1984 // Many other things have subexpressions, so we have to test those.
1986 case ParenExprClass:
1987 case MemberExprClass:
1988 case CXXReinterpretCastExprClass:
1989 case CXXConstCastExprClass:
1990 case ConditionalOperatorClass:
1991 case CompoundLiteralExprClass:
1992 case ExtVectorElementExprClass:
1993 case InitListExprClass:
1994 case DesignatedInitExprClass:
1995 case ParenListExprClass:
1996 case VAArgExprClass:
1997 case CXXDefaultArgExprClass:
1998 case ExprWithCleanupsClass:
1999 case ObjCIvarRefExprClass:
2000 case ObjCIsaExprClass:
2001 case ShuffleVectorExprClass:
2002 return CanSubExprsThrow(C, this);
2004 // Some might be dependent for other reasons.
2005 case UnaryOperatorClass:
2006 case ArraySubscriptExprClass:
2007 case ImplicitCastExprClass:
2008 case CStyleCastExprClass:
2009 case CXXStaticCastExprClass:
2010 case CXXFunctionalCastExprClass:
2011 case BinaryOperatorClass:
2012 case CompoundAssignOperatorClass:
2013 case MaterializeTemporaryExprClass: {
2014 CanThrowResult CT = isTypeDependent() ? CT_Dependent : CT_Cannot;
2015 return MergeCanThrow(CT, CanSubExprsThrow(C, this));
2018 // FIXME: We should handle StmtExpr, but that opens a MASSIVE can of worms.
2022 case ChooseExprClass:
2023 if (isTypeDependent() || isValueDependent())
2024 return CT_Dependent;
2025 return cast<ChooseExpr>(this)->getChosenSubExpr(C)->CanThrow(C);
2027 case GenericSelectionExprClass:
2028 if (cast<GenericSelectionExpr>(this)->isResultDependent())
2029 return CT_Dependent;
2030 return cast<GenericSelectionExpr>(this)->getResultExpr()->CanThrow(C);
2032 // Some expressions are always dependent.
2033 case DependentScopeDeclRefExprClass:
2034 case CXXUnresolvedConstructExprClass:
2035 case CXXDependentScopeMemberExprClass:
2036 return CT_Dependent;
2039 // All other expressions don't have subexpressions, or else they are
2045 Expr* Expr::IgnoreParens() {
2048 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2049 E = P->getSubExpr();
2052 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2053 if (P->getOpcode() == UO_Extension) {
2054 E = P->getSubExpr();
2058 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2059 if (!P->isResultDependent()) {
2060 E = P->getResultExpr();
2068 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2069 /// or CastExprs or ImplicitCastExprs, returning their operand.
2070 Expr *Expr::IgnoreParenCasts() {
2073 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2074 E = P->getSubExpr();
2077 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2078 E = P->getSubExpr();
2081 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2082 if (P->getOpcode() == UO_Extension) {
2083 E = P->getSubExpr();
2087 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2088 if (!P->isResultDependent()) {
2089 E = P->getResultExpr();
2093 if (MaterializeTemporaryExpr *Materialize
2094 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2095 E = Materialize->GetTemporaryExpr();
2098 if (SubstNonTypeTemplateParmExpr *NTTP
2099 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2100 E = NTTP->getReplacement();
2107 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2108 /// casts. This is intended purely as a temporary workaround for code
2109 /// that hasn't yet been rewritten to do the right thing about those
2110 /// casts, and may disappear along with the last internal use.
2111 Expr *Expr::IgnoreParenLValueCasts() {
2114 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2115 E = P->getSubExpr();
2117 } else if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2118 if (P->getCastKind() == CK_LValueToRValue) {
2119 E = P->getSubExpr();
2122 } else if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2123 if (P->getOpcode() == UO_Extension) {
2124 E = P->getSubExpr();
2127 } else if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2128 if (!P->isResultDependent()) {
2129 E = P->getResultExpr();
2132 } else if (MaterializeTemporaryExpr *Materialize
2133 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2134 E = Materialize->GetTemporaryExpr();
2136 } else if (SubstNonTypeTemplateParmExpr *NTTP
2137 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2138 E = NTTP->getReplacement();
2146 Expr *Expr::IgnoreParenImpCasts() {
2149 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2150 E = P->getSubExpr();
2153 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2154 E = P->getSubExpr();
2157 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2158 if (P->getOpcode() == UO_Extension) {
2159 E = P->getSubExpr();
2163 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2164 if (!P->isResultDependent()) {
2165 E = P->getResultExpr();
2169 if (MaterializeTemporaryExpr *Materialize
2170 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2171 E = Materialize->GetTemporaryExpr();
2174 if (SubstNonTypeTemplateParmExpr *NTTP
2175 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2176 E = NTTP->getReplacement();
2183 Expr *Expr::IgnoreConversionOperator() {
2184 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2185 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2186 return MCE->getImplicitObjectArgument();
2191 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2192 /// value (including ptr->int casts of the same size). Strip off any
2193 /// ParenExpr or CastExprs, returning their operand.
2194 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2197 if (ParenExpr *P = dyn_cast<ParenExpr>(E)) {
2198 E = P->getSubExpr();
2202 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2203 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2204 // ptr<->int casts of the same width. We also ignore all identity casts.
2205 Expr *SE = P->getSubExpr();
2207 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2212 if ((E->getType()->isPointerType() ||
2213 E->getType()->isIntegralType(Ctx)) &&
2214 (SE->getType()->isPointerType() ||
2215 SE->getType()->isIntegralType(Ctx)) &&
2216 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2222 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2223 if (P->getOpcode() == UO_Extension) {
2224 E = P->getSubExpr();
2229 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2230 if (!P->isResultDependent()) {
2231 E = P->getResultExpr();
2236 if (SubstNonTypeTemplateParmExpr *NTTP
2237 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2238 E = NTTP->getReplacement();
2246 bool Expr::isDefaultArgument() const {
2247 const Expr *E = this;
2248 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2249 E = M->GetTemporaryExpr();
2251 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2252 E = ICE->getSubExprAsWritten();
2254 return isa<CXXDefaultArgExpr>(E);
2257 /// \brief Skip over any no-op casts and any temporary-binding
2259 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2260 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2261 E = M->GetTemporaryExpr();
2263 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2264 if (ICE->getCastKind() == CK_NoOp)
2265 E = ICE->getSubExpr();
2270 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2271 E = BE->getSubExpr();
2273 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2274 if (ICE->getCastKind() == CK_NoOp)
2275 E = ICE->getSubExpr();
2280 return E->IgnoreParens();
2283 /// isTemporaryObject - Determines if this expression produces a
2284 /// temporary of the given class type.
2285 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2286 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2289 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2291 // Temporaries are by definition pr-values of class type.
2292 if (!E->Classify(C).isPRValue()) {
2293 // In this context, property reference is a message call and is pr-value.
2294 if (!isa<ObjCPropertyRefExpr>(E))
2298 // Black-list a few cases which yield pr-values of class type that don't
2299 // refer to temporaries of that type:
2301 // - implicit derived-to-base conversions
2302 if (isa<ImplicitCastExpr>(E)) {
2303 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2304 case CK_DerivedToBase:
2305 case CK_UncheckedDerivedToBase:
2312 // - member expressions (all)
2313 if (isa<MemberExpr>(E))
2316 // - opaque values (all)
2317 if (isa<OpaqueValueExpr>(E))
2323 bool Expr::isImplicitCXXThis() const {
2324 const Expr *E = this;
2326 // Strip away parentheses and casts we don't care about.
2328 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2329 E = Paren->getSubExpr();
2333 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2334 if (ICE->getCastKind() == CK_NoOp ||
2335 ICE->getCastKind() == CK_LValueToRValue ||
2336 ICE->getCastKind() == CK_DerivedToBase ||
2337 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2338 E = ICE->getSubExpr();
2343 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2344 if (UnOp->getOpcode() == UO_Extension) {
2345 E = UnOp->getSubExpr();
2350 if (const MaterializeTemporaryExpr *M
2351 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2352 E = M->GetTemporaryExpr();
2359 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2360 return This->isImplicit();
2365 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2366 /// in Exprs is type-dependent.
2367 bool Expr::hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs) {
2368 for (unsigned I = 0; I < NumExprs; ++I)
2369 if (Exprs[I]->isTypeDependent())
2375 /// hasAnyValueDependentArguments - Determines if any of the expressions
2376 /// in Exprs is value-dependent.
2377 bool Expr::hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs) {
2378 for (unsigned I = 0; I < NumExprs; ++I)
2379 if (Exprs[I]->isValueDependent())
2385 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef) const {
2386 // This function is attempting whether an expression is an initializer
2387 // which can be evaluated at compile-time. isEvaluatable handles most
2388 // of the cases, but it can't deal with some initializer-specific
2389 // expressions, and it can't deal with aggregates; we deal with those here,
2390 // and fall back to isEvaluatable for the other cases.
2392 // If we ever capture reference-binding directly in the AST, we can
2393 // kill the second parameter.
2397 return EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects;
2400 switch (getStmtClass()) {
2402 case StringLiteralClass:
2403 case ObjCStringLiteralClass:
2404 case ObjCEncodeExprClass:
2406 case CXXTemporaryObjectExprClass:
2407 case CXXConstructExprClass: {
2408 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2411 // 1) an application of the trivial default constructor or
2412 if (!CE->getConstructor()->isTrivial()) return false;
2413 if (!CE->getNumArgs()) return true;
2415 // 2) an elidable trivial copy construction of an operand which is
2416 // itself a constant initializer. Note that we consider the
2417 // operand on its own, *not* as a reference binding.
2418 return CE->isElidable() &&
2419 CE->getArg(0)->isConstantInitializer(Ctx, false);
2421 case CompoundLiteralExprClass: {
2422 // This handles gcc's extension that allows global initializers like
2423 // "struct x {int x;} x = (struct x) {};".
2424 // FIXME: This accepts other cases it shouldn't!
2425 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2426 return Exp->isConstantInitializer(Ctx, false);
2428 case InitListExprClass: {
2429 // FIXME: This doesn't deal with fields with reference types correctly.
2430 // FIXME: This incorrectly allows pointers cast to integers to be assigned
2432 const InitListExpr *Exp = cast<InitListExpr>(this);
2433 unsigned numInits = Exp->getNumInits();
2434 for (unsigned i = 0; i < numInits; i++) {
2435 if (!Exp->getInit(i)->isConstantInitializer(Ctx, false))
2440 case ImplicitValueInitExprClass:
2442 case ParenExprClass:
2443 return cast<ParenExpr>(this)->getSubExpr()
2444 ->isConstantInitializer(Ctx, IsForRef);
2445 case GenericSelectionExprClass:
2446 if (cast<GenericSelectionExpr>(this)->isResultDependent())
2448 return cast<GenericSelectionExpr>(this)->getResultExpr()
2449 ->isConstantInitializer(Ctx, IsForRef);
2450 case ChooseExprClass:
2451 return cast<ChooseExpr>(this)->getChosenSubExpr(Ctx)
2452 ->isConstantInitializer(Ctx, IsForRef);
2453 case UnaryOperatorClass: {
2454 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2455 if (Exp->getOpcode() == UO_Extension)
2456 return Exp->getSubExpr()->isConstantInitializer(Ctx, false);
2459 case BinaryOperatorClass: {
2460 // Special case &&foo - &&bar. It would be nice to generalize this somehow
2461 // but this handles the common case.
2462 const BinaryOperator *Exp = cast<BinaryOperator>(this);
2463 if (Exp->getOpcode() == BO_Sub &&
2464 isa<AddrLabelExpr>(Exp->getLHS()->IgnoreParenNoopCasts(Ctx)) &&
2465 isa<AddrLabelExpr>(Exp->getRHS()->IgnoreParenNoopCasts(Ctx)))
2469 case CXXFunctionalCastExprClass:
2470 case CXXStaticCastExprClass:
2471 case ImplicitCastExprClass:
2472 case CStyleCastExprClass:
2473 // Handle casts with a destination that's a struct or union; this
2474 // deals with both the gcc no-op struct cast extension and the
2475 // cast-to-union extension.
2476 if (getType()->isRecordType())
2477 return cast<CastExpr>(this)->getSubExpr()
2478 ->isConstantInitializer(Ctx, false);
2480 // Integer->integer casts can be handled here, which is important for
2481 // things like (int)(&&x-&&y). Scary but true.
2482 if (getType()->isIntegerType() &&
2483 cast<CastExpr>(this)->getSubExpr()->getType()->isIntegerType())
2484 return cast<CastExpr>(this)->getSubExpr()
2485 ->isConstantInitializer(Ctx, false);
2489 case MaterializeTemporaryExprClass:
2490 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2491 ->isConstantInitializer(Ctx, false);
2493 return isEvaluatable(Ctx);
2496 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
2497 /// pointer constant or not, as well as the specific kind of constant detected.
2498 /// Null pointer constants can be integer constant expressions with the
2499 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
2500 /// (a GNU extension).
2501 Expr::NullPointerConstantKind
2502 Expr::isNullPointerConstant(ASTContext &Ctx,
2503 NullPointerConstantValueDependence NPC) const {
2504 if (isValueDependent()) {
2506 case NPC_NeverValueDependent:
2507 llvm_unreachable("Unexpected value dependent expression!");
2508 case NPC_ValueDependentIsNull:
2509 if (isTypeDependent() || getType()->isIntegralType(Ctx))
2510 return NPCK_ZeroInteger;
2512 return NPCK_NotNull;
2514 case NPC_ValueDependentIsNotNull:
2515 return NPCK_NotNull;
2519 // Strip off a cast to void*, if it exists. Except in C++.
2520 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
2521 if (!Ctx.getLangOptions().CPlusPlus) {
2522 // Check that it is a cast to void*.
2523 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
2524 QualType Pointee = PT->getPointeeType();
2525 if (!Pointee.hasQualifiers() &&
2526 Pointee->isVoidType() && // to void*
2527 CE->getSubExpr()->getType()->isIntegerType()) // from int.
2528 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
2531 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
2532 // Ignore the ImplicitCastExpr type entirely.
2533 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
2534 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
2535 // Accept ((void*)0) as a null pointer constant, as many other
2536 // implementations do.
2537 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
2538 } else if (const GenericSelectionExpr *GE =
2539 dyn_cast<GenericSelectionExpr>(this)) {
2540 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
2541 } else if (const CXXDefaultArgExpr *DefaultArg
2542 = dyn_cast<CXXDefaultArgExpr>(this)) {
2543 // See through default argument expressions
2544 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
2545 } else if (isa<GNUNullExpr>(this)) {
2546 // The GNU __null extension is always a null pointer constant.
2547 return NPCK_GNUNull;
2548 } else if (const MaterializeTemporaryExpr *M
2549 = dyn_cast<MaterializeTemporaryExpr>(this)) {
2550 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
2553 // C++0x nullptr_t is always a null pointer constant.
2554 if (getType()->isNullPtrType())
2555 return NPCK_CXX0X_nullptr;
2557 if (const RecordType *UT = getType()->getAsUnionType())
2558 if (UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
2559 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
2560 const Expr *InitExpr = CLE->getInitializer();
2561 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
2562 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
2564 // This expression must be an integer type.
2565 if (!getType()->isIntegerType() ||
2566 (Ctx.getLangOptions().CPlusPlus && getType()->isEnumeralType()))
2567 return NPCK_NotNull;
2569 // If we have an integer constant expression, we need to *evaluate* it and
2570 // test for the value 0.
2571 llvm::APSInt Result;
2572 bool IsNull = isIntegerConstantExpr(Result, Ctx) && Result == 0;
2574 return (IsNull ? NPCK_ZeroInteger : NPCK_NotNull);
2577 /// \brief If this expression is an l-value for an Objective C
2578 /// property, find the underlying property reference expression.
2579 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
2580 const Expr *E = this;
2582 assert((E->getValueKind() == VK_LValue &&
2583 E->getObjectKind() == OK_ObjCProperty) &&
2584 "expression is not a property reference");
2585 E = E->IgnoreParenCasts();
2586 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
2587 if (BO->getOpcode() == BO_Comma) {
2596 return cast<ObjCPropertyRefExpr>(E);
2599 FieldDecl *Expr::getBitField() {
2600 Expr *E = this->IgnoreParens();
2602 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2603 if (ICE->getCastKind() == CK_LValueToRValue ||
2604 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
2605 E = ICE->getSubExpr()->IgnoreParens();
2610 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
2611 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
2612 if (Field->isBitField())
2615 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E))
2616 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
2617 if (Field->isBitField())
2620 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
2621 if (BinOp->isAssignmentOp() && BinOp->getLHS())
2622 return BinOp->getLHS()->getBitField();
2624 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
2625 return BinOp->getRHS()->getBitField();
2631 bool Expr::refersToVectorElement() const {
2632 const Expr *E = this->IgnoreParens();
2634 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2635 if (ICE->getValueKind() != VK_RValue &&
2636 ICE->getCastKind() == CK_NoOp)
2637 E = ICE->getSubExpr()->IgnoreParens();
2642 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
2643 return ASE->getBase()->getType()->isVectorType();
2645 if (isa<ExtVectorElementExpr>(E))
2651 /// isArrow - Return true if the base expression is a pointer to vector,
2652 /// return false if the base expression is a vector.
2653 bool ExtVectorElementExpr::isArrow() const {
2654 return getBase()->getType()->isPointerType();
2657 unsigned ExtVectorElementExpr::getNumElements() const {
2658 if (const VectorType *VT = getType()->getAs<VectorType>())
2659 return VT->getNumElements();
2663 /// containsDuplicateElements - Return true if any element access is repeated.
2664 bool ExtVectorElementExpr::containsDuplicateElements() const {
2665 // FIXME: Refactor this code to an accessor on the AST node which returns the
2666 // "type" of component access, and share with code below and in Sema.
2667 StringRef Comp = Accessor->getName();
2669 // Halving swizzles do not contain duplicate elements.
2670 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
2673 // Advance past s-char prefix on hex swizzles.
2674 if (Comp[0] == 's' || Comp[0] == 'S')
2675 Comp = Comp.substr(1);
2677 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
2678 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
2684 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
2685 void ExtVectorElementExpr::getEncodedElementAccess(
2686 SmallVectorImpl<unsigned> &Elts) const {
2687 StringRef Comp = Accessor->getName();
2688 if (Comp[0] == 's' || Comp[0] == 'S')
2689 Comp = Comp.substr(1);
2691 bool isHi = Comp == "hi";
2692 bool isLo = Comp == "lo";
2693 bool isEven = Comp == "even";
2694 bool isOdd = Comp == "odd";
2696 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
2708 Index = ExtVectorType::getAccessorIdx(Comp[i]);
2710 Elts.push_back(Index);
2714 ObjCMessageExpr::ObjCMessageExpr(QualType T,
2716 SourceLocation LBracLoc,
2717 SourceLocation SuperLoc,
2718 bool IsInstanceSuper,
2721 ArrayRef<SourceLocation> SelLocs,
2722 SelectorLocationsKind SelLocsK,
2723 ObjCMethodDecl *Method,
2724 ArrayRef<Expr *> Args,
2725 SourceLocation RBracLoc)
2726 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary,
2727 /*TypeDependent=*/false, /*ValueDependent=*/false,
2728 /*InstantiationDependent=*/false,
2729 /*ContainsUnexpandedParameterPack=*/false),
2730 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
2731 : Sel.getAsOpaquePtr())),
2732 Kind(IsInstanceSuper? SuperInstance : SuperClass),
2733 HasMethod(Method != 0), IsDelegateInitCall(false), SuperLoc(SuperLoc),
2734 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
2736 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
2737 setReceiverPointer(SuperType.getAsOpaquePtr());
2740 ObjCMessageExpr::ObjCMessageExpr(QualType T,
2742 SourceLocation LBracLoc,
2743 TypeSourceInfo *Receiver,
2745 ArrayRef<SourceLocation> SelLocs,
2746 SelectorLocationsKind SelLocsK,
2747 ObjCMethodDecl *Method,
2748 ArrayRef<Expr *> Args,
2749 SourceLocation RBracLoc)
2750 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, T->isDependentType(),
2751 T->isDependentType(), T->isInstantiationDependentType(),
2752 T->containsUnexpandedParameterPack()),
2753 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
2754 : Sel.getAsOpaquePtr())),
2756 HasMethod(Method != 0), IsDelegateInitCall(false),
2757 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
2759 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
2760 setReceiverPointer(Receiver);
2763 ObjCMessageExpr::ObjCMessageExpr(QualType T,
2765 SourceLocation LBracLoc,
2768 ArrayRef<SourceLocation> SelLocs,
2769 SelectorLocationsKind SelLocsK,
2770 ObjCMethodDecl *Method,
2771 ArrayRef<Expr *> Args,
2772 SourceLocation RBracLoc)
2773 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary, Receiver->isTypeDependent(),
2774 Receiver->isTypeDependent(),
2775 Receiver->isInstantiationDependent(),
2776 Receiver->containsUnexpandedParameterPack()),
2777 SelectorOrMethod(reinterpret_cast<uintptr_t>(Method? Method
2778 : Sel.getAsOpaquePtr())),
2780 HasMethod(Method != 0), IsDelegateInitCall(false),
2781 LBracLoc(LBracLoc), RBracLoc(RBracLoc)
2783 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
2784 setReceiverPointer(Receiver);
2787 void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
2788 ArrayRef<SourceLocation> SelLocs,
2789 SelectorLocationsKind SelLocsK) {
2790 setNumArgs(Args.size());
2791 Expr **MyArgs = getArgs();
2792 for (unsigned I = 0; I != Args.size(); ++I) {
2793 if (Args[I]->isTypeDependent())
2794 ExprBits.TypeDependent = true;
2795 if (Args[I]->isValueDependent())
2796 ExprBits.ValueDependent = true;
2797 if (Args[I]->isInstantiationDependent())
2798 ExprBits.InstantiationDependent = true;
2799 if (Args[I]->containsUnexpandedParameterPack())
2800 ExprBits.ContainsUnexpandedParameterPack = true;
2802 MyArgs[I] = Args[I];
2805 SelLocsKind = SelLocsK;
2806 if (SelLocsK == SelLoc_NonStandard)
2807 std::copy(SelLocs.begin(), SelLocs.end(), getStoredSelLocs());
2810 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
2812 SourceLocation LBracLoc,
2813 SourceLocation SuperLoc,
2814 bool IsInstanceSuper,
2817 ArrayRef<SourceLocation> SelLocs,
2818 ObjCMethodDecl *Method,
2819 ArrayRef<Expr *> Args,
2820 SourceLocation RBracLoc) {
2821 SelectorLocationsKind SelLocsK;
2822 ObjCMessageExpr *Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
2823 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
2824 SuperType, Sel, SelLocs, SelLocsK,
2825 Method, Args, RBracLoc);
2828 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
2830 SourceLocation LBracLoc,
2831 TypeSourceInfo *Receiver,
2833 ArrayRef<SourceLocation> SelLocs,
2834 ObjCMethodDecl *Method,
2835 ArrayRef<Expr *> Args,
2836 SourceLocation RBracLoc) {
2837 SelectorLocationsKind SelLocsK;
2838 ObjCMessageExpr *Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
2839 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
2840 SelLocs, SelLocsK, Method, Args, RBracLoc);
2843 ObjCMessageExpr *ObjCMessageExpr::Create(ASTContext &Context, QualType T,
2845 SourceLocation LBracLoc,
2848 ArrayRef<SourceLocation> SelLocs,
2849 ObjCMethodDecl *Method,
2850 ArrayRef<Expr *> Args,
2851 SourceLocation RBracLoc) {
2852 SelectorLocationsKind SelLocsK;
2853 ObjCMessageExpr *Mem = alloc(Context, Args, RBracLoc, SelLocs, Sel, SelLocsK);
2854 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel,
2855 SelLocs, SelLocsK, Method, Args, RBracLoc);
2858 ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(ASTContext &Context,
2860 unsigned NumStoredSelLocs) {
2861 ObjCMessageExpr *Mem = alloc(Context, NumArgs, NumStoredSelLocs);
2862 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
2865 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C,
2866 ArrayRef<Expr *> Args,
2867 SourceLocation RBraceLoc,
2868 ArrayRef<SourceLocation> SelLocs,
2870 SelectorLocationsKind &SelLocsK) {
2871 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, RBraceLoc);
2872 unsigned NumStoredSelLocs = (SelLocsK == SelLoc_NonStandard) ? SelLocs.size()
2874 return alloc(C, Args.size(), NumStoredSelLocs);
2877 ObjCMessageExpr *ObjCMessageExpr::alloc(ASTContext &C,
2879 unsigned NumStoredSelLocs) {
2880 unsigned Size = sizeof(ObjCMessageExpr) + sizeof(void *) +
2881 NumArgs * sizeof(Expr *) + NumStoredSelLocs * sizeof(SourceLocation);
2882 return (ObjCMessageExpr *)C.Allocate(Size,
2883 llvm::AlignOf<ObjCMessageExpr>::Alignment);
2886 void ObjCMessageExpr::getSelectorLocs(
2887 SmallVectorImpl<SourceLocation> &SelLocs) const {
2888 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
2889 SelLocs.push_back(getSelectorLoc(i));
2892 SourceRange ObjCMessageExpr::getReceiverRange() const {
2893 switch (getReceiverKind()) {
2895 return getInstanceReceiver()->getSourceRange();
2898 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
2902 return getSuperLoc();
2905 return SourceLocation();
2908 Selector ObjCMessageExpr::getSelector() const {
2910 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
2912 return Selector(SelectorOrMethod);
2915 ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
2916 switch (getReceiverKind()) {
2918 if (const ObjCObjectPointerType *Ptr
2919 = getInstanceReceiver()->getType()->getAs<ObjCObjectPointerType>())
2920 return Ptr->getInterfaceDecl();
2924 if (const ObjCObjectType *Ty
2925 = getClassReceiver()->getAs<ObjCObjectType>())
2926 return Ty->getInterface();
2930 if (const ObjCObjectPointerType *Ptr
2931 = getSuperType()->getAs<ObjCObjectPointerType>())
2932 return Ptr->getInterfaceDecl();
2936 if (const ObjCObjectType *Iface
2937 = getSuperType()->getAs<ObjCObjectType>())
2938 return Iface->getInterface();
2945 StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
2946 switch (getBridgeKind()) {
2949 case OBC_BridgeTransfer:
2950 return "__bridge_transfer";
2951 case OBC_BridgeRetained:
2952 return "__bridge_retained";
2958 bool ChooseExpr::isConditionTrue(const ASTContext &C) const {
2959 return getCond()->EvaluateKnownConstInt(C) != 0;
2962 ShuffleVectorExpr::ShuffleVectorExpr(ASTContext &C, Expr **args, unsigned nexpr,
2963 QualType Type, SourceLocation BLoc,
2965 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
2966 Type->isDependentType(), Type->isDependentType(),
2967 Type->isInstantiationDependentType(),
2968 Type->containsUnexpandedParameterPack()),
2969 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(nexpr)
2971 SubExprs = new (C) Stmt*[nexpr];
2972 for (unsigned i = 0; i < nexpr; i++) {
2973 if (args[i]->isTypeDependent())
2974 ExprBits.TypeDependent = true;
2975 if (args[i]->isValueDependent())
2976 ExprBits.ValueDependent = true;
2977 if (args[i]->isInstantiationDependent())
2978 ExprBits.InstantiationDependent = true;
2979 if (args[i]->containsUnexpandedParameterPack())
2980 ExprBits.ContainsUnexpandedParameterPack = true;
2982 SubExprs[i] = args[i];
2986 void ShuffleVectorExpr::setExprs(ASTContext &C, Expr ** Exprs,
2987 unsigned NumExprs) {
2988 if (SubExprs) C.Deallocate(SubExprs);
2990 SubExprs = new (C) Stmt* [NumExprs];
2991 this->NumExprs = NumExprs;
2992 memcpy(SubExprs, Exprs, sizeof(Expr *) * NumExprs);
2995 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context,
2996 SourceLocation GenericLoc, Expr *ControllingExpr,
2997 TypeSourceInfo **AssocTypes, Expr **AssocExprs,
2998 unsigned NumAssocs, SourceLocation DefaultLoc,
2999 SourceLocation RParenLoc,
3000 bool ContainsUnexpandedParameterPack,
3001 unsigned ResultIndex)
3002 : Expr(GenericSelectionExprClass,
3003 AssocExprs[ResultIndex]->getType(),
3004 AssocExprs[ResultIndex]->getValueKind(),
3005 AssocExprs[ResultIndex]->getObjectKind(),
3006 AssocExprs[ResultIndex]->isTypeDependent(),
3007 AssocExprs[ResultIndex]->isValueDependent(),
3008 AssocExprs[ResultIndex]->isInstantiationDependent(),
3009 ContainsUnexpandedParameterPack),
3010 AssocTypes(new (Context) TypeSourceInfo*[NumAssocs]),
3011 SubExprs(new (Context) Stmt*[END_EXPR+NumAssocs]), NumAssocs(NumAssocs),
3012 ResultIndex(ResultIndex), GenericLoc(GenericLoc), DefaultLoc(DefaultLoc),
3013 RParenLoc(RParenLoc) {
3014 SubExprs[CONTROLLING] = ControllingExpr;
3015 std::copy(AssocTypes, AssocTypes+NumAssocs, this->AssocTypes);
3016 std::copy(AssocExprs, AssocExprs+NumAssocs, SubExprs+END_EXPR);
3019 GenericSelectionExpr::GenericSelectionExpr(ASTContext &Context,
3020 SourceLocation GenericLoc, Expr *ControllingExpr,
3021 TypeSourceInfo **AssocTypes, Expr **AssocExprs,
3022 unsigned NumAssocs, SourceLocation DefaultLoc,
3023 SourceLocation RParenLoc,
3024 bool ContainsUnexpandedParameterPack)
3025 : Expr(GenericSelectionExprClass,
3026 Context.DependentTy,
3029 /*isTypeDependent=*/true,
3030 /*isValueDependent=*/true,
3031 /*isInstantiationDependent=*/true,
3032 ContainsUnexpandedParameterPack),
3033 AssocTypes(new (Context) TypeSourceInfo*[NumAssocs]),
3034 SubExprs(new (Context) Stmt*[END_EXPR+NumAssocs]), NumAssocs(NumAssocs),
3035 ResultIndex(-1U), GenericLoc(GenericLoc), DefaultLoc(DefaultLoc),
3036 RParenLoc(RParenLoc) {
3037 SubExprs[CONTROLLING] = ControllingExpr;
3038 std::copy(AssocTypes, AssocTypes+NumAssocs, this->AssocTypes);
3039 std::copy(AssocExprs, AssocExprs+NumAssocs, SubExprs+END_EXPR);
3042 //===----------------------------------------------------------------------===//
3043 // DesignatedInitExpr
3044 //===----------------------------------------------------------------------===//
3046 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3047 assert(Kind == FieldDesignator && "Only valid on a field designator");
3048 if (Field.NameOrField & 0x01)
3049 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3051 return getField()->getIdentifier();
3054 DesignatedInitExpr::DesignatedInitExpr(ASTContext &C, QualType Ty,
3055 unsigned NumDesignators,
3056 const Designator *Designators,
3057 SourceLocation EqualOrColonLoc,
3060 unsigned NumIndexExprs,
3062 : Expr(DesignatedInitExprClass, Ty,
3063 Init->getValueKind(), Init->getObjectKind(),
3064 Init->isTypeDependent(), Init->isValueDependent(),
3065 Init->isInstantiationDependent(),
3066 Init->containsUnexpandedParameterPack()),
3067 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3068 NumDesignators(NumDesignators), NumSubExprs(NumIndexExprs + 1) {
3069 this->Designators = new (C) Designator[NumDesignators];
3071 // Record the initializer itself.
3072 child_range Child = children();
3075 // Copy the designators and their subexpressions, computing
3076 // value-dependence along the way.
3077 unsigned IndexIdx = 0;
3078 for (unsigned I = 0; I != NumDesignators; ++I) {
3079 this->Designators[I] = Designators[I];
3081 if (this->Designators[I].isArrayDesignator()) {
3082 // Compute type- and value-dependence.
3083 Expr *Index = IndexExprs[IndexIdx];
3084 if (Index->isTypeDependent() || Index->isValueDependent())
3085 ExprBits.ValueDependent = true;
3086 if (Index->isInstantiationDependent())
3087 ExprBits.InstantiationDependent = true;
3088 // Propagate unexpanded parameter packs.
3089 if (Index->containsUnexpandedParameterPack())
3090 ExprBits.ContainsUnexpandedParameterPack = true;
3092 // Copy the index expressions into permanent storage.
3093 *Child++ = IndexExprs[IndexIdx++];
3094 } else if (this->Designators[I].isArrayRangeDesignator()) {
3095 // Compute type- and value-dependence.
3096 Expr *Start = IndexExprs[IndexIdx];
3097 Expr *End = IndexExprs[IndexIdx + 1];
3098 if (Start->isTypeDependent() || Start->isValueDependent() ||
3099 End->isTypeDependent() || End->isValueDependent()) {
3100 ExprBits.ValueDependent = true;
3101 ExprBits.InstantiationDependent = true;
3102 } else if (Start->isInstantiationDependent() ||
3103 End->isInstantiationDependent()) {
3104 ExprBits.InstantiationDependent = true;
3107 // Propagate unexpanded parameter packs.
3108 if (Start->containsUnexpandedParameterPack() ||
3109 End->containsUnexpandedParameterPack())
3110 ExprBits.ContainsUnexpandedParameterPack = true;
3112 // Copy the start/end expressions into permanent storage.
3113 *Child++ = IndexExprs[IndexIdx++];
3114 *Child++ = IndexExprs[IndexIdx++];
3118 assert(IndexIdx == NumIndexExprs && "Wrong number of index expressions");
3121 DesignatedInitExpr *
3122 DesignatedInitExpr::Create(ASTContext &C, Designator *Designators,
3123 unsigned NumDesignators,
3124 Expr **IndexExprs, unsigned NumIndexExprs,
3125 SourceLocation ColonOrEqualLoc,
3126 bool UsesColonSyntax, Expr *Init) {
3127 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3128 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3129 return new (Mem) DesignatedInitExpr(C, C.VoidTy, NumDesignators, Designators,
3130 ColonOrEqualLoc, UsesColonSyntax,
3131 IndexExprs, NumIndexExprs, Init);
3134 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(ASTContext &C,
3135 unsigned NumIndexExprs) {
3136 void *Mem = C.Allocate(sizeof(DesignatedInitExpr) +
3137 sizeof(Stmt *) * (NumIndexExprs + 1), 8);
3138 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3141 void DesignatedInitExpr::setDesignators(ASTContext &C,
3142 const Designator *Desigs,
3143 unsigned NumDesigs) {
3144 Designators = new (C) Designator[NumDesigs];
3145 NumDesignators = NumDesigs;
3146 for (unsigned I = 0; I != NumDesigs; ++I)
3147 Designators[I] = Desigs[I];
3150 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3151 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3153 return DIE->getDesignator(0)->getSourceRange();
3154 return SourceRange(DIE->getDesignator(0)->getStartLocation(),
3155 DIE->getDesignator(size()-1)->getEndLocation());
3158 SourceRange DesignatedInitExpr::getSourceRange() const {
3159 SourceLocation StartLoc;
3161 *const_cast<DesignatedInitExpr*>(this)->designators_begin();
3162 if (First.isFieldDesignator()) {
3164 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3166 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3169 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3170 return SourceRange(StartLoc, getInit()->getSourceRange().getEnd());
3173 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) {
3174 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3175 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3176 Ptr += sizeof(DesignatedInitExpr);
3177 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3178 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3181 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator& D) {
3182 assert(D.Kind == Designator::ArrayRangeDesignator &&
3183 "Requires array range designator");
3184 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3185 Ptr += sizeof(DesignatedInitExpr);
3186 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3187 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 1));
3190 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator& D) {
3191 assert(D.Kind == Designator::ArrayRangeDesignator &&
3192 "Requires array range designator");
3193 char* Ptr = static_cast<char*>(static_cast<void *>(this));
3194 Ptr += sizeof(DesignatedInitExpr);
3195 Stmt **SubExprs = reinterpret_cast<Stmt**>(reinterpret_cast<void**>(Ptr));
3196 return cast<Expr>(*(SubExprs + D.ArrayOrRange.Index + 2));
3199 /// \brief Replaces the designator at index @p Idx with the series
3200 /// of designators in [First, Last).
3201 void DesignatedInitExpr::ExpandDesignator(ASTContext &C, unsigned Idx,
3202 const Designator *First,
3203 const Designator *Last) {
3204 unsigned NumNewDesignators = Last - First;
3205 if (NumNewDesignators == 0) {
3206 std::copy_backward(Designators + Idx + 1,
3207 Designators + NumDesignators,
3209 --NumNewDesignators;
3211 } else if (NumNewDesignators == 1) {
3212 Designators[Idx] = *First;
3216 Designator *NewDesignators
3217 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3218 std::copy(Designators, Designators + Idx, NewDesignators);
3219 std::copy(First, Last, NewDesignators + Idx);
3220 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3221 NewDesignators + Idx + NumNewDesignators);
3222 Designators = NewDesignators;
3223 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3226 ParenListExpr::ParenListExpr(ASTContext& C, SourceLocation lparenloc,
3227 Expr **exprs, unsigned nexprs,
3228 SourceLocation rparenloc, QualType T)
3229 : Expr(ParenListExprClass, T, VK_RValue, OK_Ordinary,
3230 false, false, false, false),
3231 NumExprs(nexprs), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3232 assert(!T.isNull() && "ParenListExpr must have a valid type");
3233 Exprs = new (C) Stmt*[nexprs];
3234 for (unsigned i = 0; i != nexprs; ++i) {
3235 if (exprs[i]->isTypeDependent())
3236 ExprBits.TypeDependent = true;
3237 if (exprs[i]->isValueDependent())
3238 ExprBits.ValueDependent = true;
3239 if (exprs[i]->isInstantiationDependent())
3240 ExprBits.InstantiationDependent = true;
3241 if (exprs[i]->containsUnexpandedParameterPack())
3242 ExprBits.ContainsUnexpandedParameterPack = true;
3244 Exprs[i] = exprs[i];
3248 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3249 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3250 e = ewc->getSubExpr();
3251 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3252 e = m->GetTemporaryExpr();
3253 e = cast<CXXConstructExpr>(e)->getArg(0);
3254 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3255 e = ice->getSubExpr();
3256 return cast<OpaqueValueExpr>(e);
3259 //===----------------------------------------------------------------------===//
3261 //===----------------------------------------------------------------------===//
3263 Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); }
3264 Expr* ExprIterator::operator*() const { return cast<Expr>(*I); }
3265 Expr* ExprIterator::operator->() const { return cast<Expr>(*I); }
3266 const Expr* ConstExprIterator::operator[](size_t idx) const {
3267 return cast<Expr>(I[idx]);
3269 const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); }
3270 const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); }
3272 //===----------------------------------------------------------------------===//
3273 // Child Iterators for iterating over subexpressions/substatements
3274 //===----------------------------------------------------------------------===//
3276 // UnaryExprOrTypeTraitExpr
3277 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
3278 // If this is of a type and the type is a VLA type (and not a typedef), the
3279 // size expression of the VLA needs to be treated as an executable expression.
3280 // Why isn't this weirdness documented better in StmtIterator?
3281 if (isArgumentType()) {
3282 if (const VariableArrayType* T = dyn_cast<VariableArrayType>(
3283 getArgumentType().getTypePtr()))
3284 return child_range(child_iterator(T), child_iterator());
3285 return child_range();
3287 return child_range(&Argument.Ex, &Argument.Ex + 1);
3291 Stmt::child_range ObjCMessageExpr::children() {
3293 if (getReceiverKind() == Instance)
3294 begin = reinterpret_cast<Stmt **>(this + 1);
3296 begin = reinterpret_cast<Stmt **>(getArgs());
3297 return child_range(begin,
3298 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
3302 BlockDeclRefExpr::BlockDeclRefExpr(VarDecl *d, QualType t, ExprValueKind VK,
3303 SourceLocation l, bool ByRef,
3305 : Expr(BlockDeclRefExprClass, t, VK, OK_Ordinary, false, false, false,
3306 d->isParameterPack()),
3307 D(d), Loc(l), IsByRef(ByRef), ConstQualAdded(constAdded)
3309 bool TypeDependent = false;
3310 bool ValueDependent = false;
3311 bool InstantiationDependent = false;
3312 computeDeclRefDependence(D, getType(), TypeDependent, ValueDependent,
3313 InstantiationDependent);
3314 ExprBits.TypeDependent = TypeDependent;
3315 ExprBits.ValueDependent = ValueDependent;
3316 ExprBits.InstantiationDependent = InstantiationDependent;
3320 AtomicExpr::AtomicExpr(SourceLocation BLoc, Expr **args, unsigned nexpr,
3321 QualType t, AtomicOp op, SourceLocation RP)
3322 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
3323 false, false, false, false),
3324 NumSubExprs(nexpr), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
3326 for (unsigned i = 0; i < nexpr; i++) {
3327 if (args[i]->isTypeDependent())
3328 ExprBits.TypeDependent = true;
3329 if (args[i]->isValueDependent())
3330 ExprBits.ValueDependent = true;
3331 if (args[i]->isInstantiationDependent())
3332 ExprBits.InstantiationDependent = true;
3333 if (args[i]->containsUnexpandedParameterPack())
3334 ExprBits.ContainsUnexpandedParameterPack = true;
3336 SubExprs[i] = args[i];