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Reid Spencer5f016e22007-07-11 17:01:13 +00001//===--- SemaExprCXX.cpp - Semantic Analysis for Expressions --------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner0bc735f2007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Reid Spencer5f016e22007-07-11 17:01:13 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements semantic analysis for C++ expressions.
11//
12//===----------------------------------------------------------------------===//
13
John McCall2d887082010-08-25 22:03:47 +000014#include "clang/Sema/SemaInternal.h"
John McCall2a7fb272010-08-25 05:32:35 +000015#include "clang/Sema/DeclSpec.h"
Douglas Gregore737f502010-08-12 20:07:10 +000016#include "clang/Sema/Initialization.h"
17#include "clang/Sema/Lookup.h"
John McCall2a7fb272010-08-25 05:32:35 +000018#include "clang/Sema/ParsedTemplate.h"
19#include "clang/Sema/TemplateDeduction.h"
Steve Naroff210679c2007-08-25 14:02:58 +000020#include "clang/AST/ASTContext.h"
Douglas Gregora8f32e02009-10-06 17:59:45 +000021#include "clang/AST/CXXInheritance.h"
John McCall7cd088e2010-08-24 07:21:54 +000022#include "clang/AST/DeclObjC.h"
Anders Carlssond497ba72009-08-26 22:59:12 +000023#include "clang/AST/ExprCXX.h"
Fariborz Jahaniand4266622010-06-16 18:56:04 +000024#include "clang/AST/ExprObjC.h"
Douglas Gregorb57fb492010-02-24 22:38:50 +000025#include "clang/AST/TypeLoc.h"
Anders Carlssond497ba72009-08-26 22:59:12 +000026#include "clang/Basic/PartialDiagnostic.h"
Sebastian Redlb5a57a62008-12-03 20:26:15 +000027#include "clang/Basic/TargetInfo.h"
Anders Carlssond497ba72009-08-26 22:59:12 +000028#include "clang/Lex/Preprocessor.h"
Douglas Gregor3fc749d2008-12-23 00:26:44 +000029#include "llvm/ADT/STLExtras.h"
Reid Spencer5f016e22007-07-11 17:01:13 +000030using namespace clang;
John McCall2a7fb272010-08-25 05:32:35 +000031using namespace sema;
Reid Spencer5f016e22007-07-11 17:01:13 +000032
John McCallb3d87482010-08-24 05:47:05 +000033ParsedType Sema::getDestructorName(SourceLocation TildeLoc,
34 IdentifierInfo &II,
35 SourceLocation NameLoc,
36 Scope *S, CXXScopeSpec &SS,
37 ParsedType ObjectTypePtr,
38 bool EnteringContext) {
Douglas Gregor124b8782010-02-16 19:09:40 +000039 // Determine where to perform name lookup.
40
41 // FIXME: This area of the standard is very messy, and the current
42 // wording is rather unclear about which scopes we search for the
43 // destructor name; see core issues 399 and 555. Issue 399 in
44 // particular shows where the current description of destructor name
45 // lookup is completely out of line with existing practice, e.g.,
46 // this appears to be ill-formed:
47 //
48 // namespace N {
49 // template <typename T> struct S {
50 // ~S();
51 // };
52 // }
53 //
54 // void f(N::S<int>* s) {
55 // s->N::S<int>::~S();
56 // }
57 //
Douglas Gregor93649fd2010-02-23 00:15:22 +000058 // See also PR6358 and PR6359.
Sebastian Redlc0fee502010-07-07 23:17:38 +000059 // For this reason, we're currently only doing the C++03 version of this
60 // code; the C++0x version has to wait until we get a proper spec.
Douglas Gregor124b8782010-02-16 19:09:40 +000061 QualType SearchType;
62 DeclContext *LookupCtx = 0;
63 bool isDependent = false;
64 bool LookInScope = false;
65
66 // If we have an object type, it's because we are in a
67 // pseudo-destructor-expression or a member access expression, and
68 // we know what type we're looking for.
69 if (ObjectTypePtr)
70 SearchType = GetTypeFromParser(ObjectTypePtr);
71
72 if (SS.isSet()) {
Douglas Gregor93649fd2010-02-23 00:15:22 +000073 NestedNameSpecifier *NNS = (NestedNameSpecifier *)SS.getScopeRep();
74
75 bool AlreadySearched = false;
76 bool LookAtPrefix = true;
Sebastian Redlc0fee502010-07-07 23:17:38 +000077 // C++ [basic.lookup.qual]p6:
78 // If a pseudo-destructor-name (5.2.4) contains a nested-name-specifier,
79 // the type-names are looked up as types in the scope designated by the
80 // nested-name-specifier. In a qualified-id of the form:
81 //
82 // ::[opt] nested-name-specifier ̃ class-name
83 //
84 // where the nested-name-specifier designates a namespace scope, and in
Chandler Carruth5e895a82010-02-21 10:19:54 +000085 // a qualified-id of the form:
Douglas Gregor124b8782010-02-16 19:09:40 +000086 //
Sebastian Redlc0fee502010-07-07 23:17:38 +000087 // ::opt nested-name-specifier class-name :: ̃ class-name
Douglas Gregor124b8782010-02-16 19:09:40 +000088 //
Sebastian Redlc0fee502010-07-07 23:17:38 +000089 // the class-names are looked up as types in the scope designated by
90 // the nested-name-specifier.
Douglas Gregor124b8782010-02-16 19:09:40 +000091 //
Sebastian Redlc0fee502010-07-07 23:17:38 +000092 // Here, we check the first case (completely) and determine whether the
93 // code below is permitted to look at the prefix of the
94 // nested-name-specifier.
95 DeclContext *DC = computeDeclContext(SS, EnteringContext);
96 if (DC && DC->isFileContext()) {
97 AlreadySearched = true;
98 LookupCtx = DC;
99 isDependent = false;
100 } else if (DC && isa<CXXRecordDecl>(DC))
101 LookAtPrefix = false;
102
103 // The second case from the C++03 rules quoted further above.
Douglas Gregor93649fd2010-02-23 00:15:22 +0000104 NestedNameSpecifier *Prefix = 0;
105 if (AlreadySearched) {
106 // Nothing left to do.
107 } else if (LookAtPrefix && (Prefix = NNS->getPrefix())) {
108 CXXScopeSpec PrefixSS;
109 PrefixSS.setScopeRep(Prefix);
110 LookupCtx = computeDeclContext(PrefixSS, EnteringContext);
111 isDependent = isDependentScopeSpecifier(PrefixSS);
Douglas Gregor93649fd2010-02-23 00:15:22 +0000112 } else if (ObjectTypePtr) {
Douglas Gregor124b8782010-02-16 19:09:40 +0000113 LookupCtx = computeDeclContext(SearchType);
114 isDependent = SearchType->isDependentType();
115 } else {
116 LookupCtx = computeDeclContext(SS, EnteringContext);
Douglas Gregor93649fd2010-02-23 00:15:22 +0000117 isDependent = LookupCtx && LookupCtx->isDependentContext();
Douglas Gregor124b8782010-02-16 19:09:40 +0000118 }
Douglas Gregor93649fd2010-02-23 00:15:22 +0000119
Douglas Gregoredc90502010-02-25 04:46:04 +0000120 LookInScope = false;
Douglas Gregor124b8782010-02-16 19:09:40 +0000121 } else if (ObjectTypePtr) {
122 // C++ [basic.lookup.classref]p3:
123 // If the unqualified-id is ~type-name, the type-name is looked up
124 // in the context of the entire postfix-expression. If the type T
125 // of the object expression is of a class type C, the type-name is
126 // also looked up in the scope of class C. At least one of the
127 // lookups shall find a name that refers to (possibly
128 // cv-qualified) T.
129 LookupCtx = computeDeclContext(SearchType);
130 isDependent = SearchType->isDependentType();
131 assert((isDependent || !SearchType->isIncompleteType()) &&
132 "Caller should have completed object type");
133
134 LookInScope = true;
135 } else {
136 // Perform lookup into the current scope (only).
137 LookInScope = true;
138 }
139
140 LookupResult Found(*this, &II, NameLoc, LookupOrdinaryName);
141 for (unsigned Step = 0; Step != 2; ++Step) {
142 // Look for the name first in the computed lookup context (if we
143 // have one) and, if that fails to find a match, in the sope (if
144 // we're allowed to look there).
145 Found.clear();
146 if (Step == 0 && LookupCtx)
147 LookupQualifiedName(Found, LookupCtx);
Douglas Gregora2e7dd22010-02-25 01:56:36 +0000148 else if (Step == 1 && LookInScope && S)
Douglas Gregor124b8782010-02-16 19:09:40 +0000149 LookupName(Found, S);
150 else
151 continue;
152
153 // FIXME: Should we be suppressing ambiguities here?
154 if (Found.isAmbiguous())
John McCallb3d87482010-08-24 05:47:05 +0000155 return ParsedType();
Douglas Gregor124b8782010-02-16 19:09:40 +0000156
157 if (TypeDecl *Type = Found.getAsSingle<TypeDecl>()) {
158 QualType T = Context.getTypeDeclType(Type);
Douglas Gregor124b8782010-02-16 19:09:40 +0000159
160 if (SearchType.isNull() || SearchType->isDependentType() ||
161 Context.hasSameUnqualifiedType(T, SearchType)) {
162 // We found our type!
163
John McCallb3d87482010-08-24 05:47:05 +0000164 return ParsedType::make(T);
Douglas Gregor124b8782010-02-16 19:09:40 +0000165 }
166 }
167
168 // If the name that we found is a class template name, and it is
169 // the same name as the template name in the last part of the
170 // nested-name-specifier (if present) or the object type, then
171 // this is the destructor for that class.
172 // FIXME: This is a workaround until we get real drafting for core
173 // issue 399, for which there isn't even an obvious direction.
174 if (ClassTemplateDecl *Template = Found.getAsSingle<ClassTemplateDecl>()) {
175 QualType MemberOfType;
176 if (SS.isSet()) {
177 if (DeclContext *Ctx = computeDeclContext(SS, EnteringContext)) {
178 // Figure out the type of the context, if it has one.
John McCall3cb0ebd2010-03-10 03:28:59 +0000179 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx))
180 MemberOfType = Context.getTypeDeclType(Record);
Douglas Gregor124b8782010-02-16 19:09:40 +0000181 }
182 }
183 if (MemberOfType.isNull())
184 MemberOfType = SearchType;
185
186 if (MemberOfType.isNull())
187 continue;
188
189 // We're referring into a class template specialization. If the
190 // class template we found is the same as the template being
191 // specialized, we found what we are looking for.
192 if (const RecordType *Record = MemberOfType->getAs<RecordType>()) {
193 if (ClassTemplateSpecializationDecl *Spec
194 = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) {
195 if (Spec->getSpecializedTemplate()->getCanonicalDecl() ==
196 Template->getCanonicalDecl())
John McCallb3d87482010-08-24 05:47:05 +0000197 return ParsedType::make(MemberOfType);
Douglas Gregor124b8782010-02-16 19:09:40 +0000198 }
199
200 continue;
201 }
202
203 // We're referring to an unresolved class template
204 // specialization. Determine whether we class template we found
205 // is the same as the template being specialized or, if we don't
206 // know which template is being specialized, that it at least
207 // has the same name.
208 if (const TemplateSpecializationType *SpecType
209 = MemberOfType->getAs<TemplateSpecializationType>()) {
210 TemplateName SpecName = SpecType->getTemplateName();
211
212 // The class template we found is the same template being
213 // specialized.
214 if (TemplateDecl *SpecTemplate = SpecName.getAsTemplateDecl()) {
215 if (SpecTemplate->getCanonicalDecl() == Template->getCanonicalDecl())
John McCallb3d87482010-08-24 05:47:05 +0000216 return ParsedType::make(MemberOfType);
Douglas Gregor124b8782010-02-16 19:09:40 +0000217
218 continue;
219 }
220
221 // The class template we found has the same name as the
222 // (dependent) template name being specialized.
223 if (DependentTemplateName *DepTemplate
224 = SpecName.getAsDependentTemplateName()) {
225 if (DepTemplate->isIdentifier() &&
226 DepTemplate->getIdentifier() == Template->getIdentifier())
John McCallb3d87482010-08-24 05:47:05 +0000227 return ParsedType::make(MemberOfType);
Douglas Gregor124b8782010-02-16 19:09:40 +0000228
229 continue;
230 }
231 }
232 }
233 }
234
235 if (isDependent) {
236 // We didn't find our type, but that's okay: it's dependent
237 // anyway.
238 NestedNameSpecifier *NNS = 0;
239 SourceRange Range;
240 if (SS.isSet()) {
241 NNS = (NestedNameSpecifier *)SS.getScopeRep();
242 Range = SourceRange(SS.getRange().getBegin(), NameLoc);
243 } else {
244 NNS = NestedNameSpecifier::Create(Context, &II);
245 Range = SourceRange(NameLoc);
246 }
247
John McCallb3d87482010-08-24 05:47:05 +0000248 QualType T = CheckTypenameType(ETK_None, NNS, II,
249 SourceLocation(),
250 Range, NameLoc);
251 return ParsedType::make(T);
Douglas Gregor124b8782010-02-16 19:09:40 +0000252 }
253
254 if (ObjectTypePtr)
255 Diag(NameLoc, diag::err_ident_in_pseudo_dtor_not_a_type)
256 << &II;
257 else
258 Diag(NameLoc, diag::err_destructor_class_name);
259
John McCallb3d87482010-08-24 05:47:05 +0000260 return ParsedType();
Douglas Gregor124b8782010-02-16 19:09:40 +0000261}
262
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000263/// \brief Build a C++ typeid expression with a type operand.
John McCall60d7b3a2010-08-24 06:29:42 +0000264ExprResult Sema::BuildCXXTypeId(QualType TypeInfoType,
Douglas Gregor4eb4f0f2010-09-08 23:14:30 +0000265 SourceLocation TypeidLoc,
266 TypeSourceInfo *Operand,
267 SourceLocation RParenLoc) {
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000268 // C++ [expr.typeid]p4:
269 // The top-level cv-qualifiers of the lvalue expression or the type-id
270 // that is the operand of typeid are always ignored.
271 // If the type of the type-id is a class type or a reference to a class
272 // type, the class shall be completely-defined.
Douglas Gregord1c1d7b2010-06-02 06:16:02 +0000273 Qualifiers Quals;
274 QualType T
275 = Context.getUnqualifiedArrayType(Operand->getType().getNonReferenceType(),
276 Quals);
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000277 if (T->getAs<RecordType>() &&
278 RequireCompleteType(TypeidLoc, T, diag::err_incomplete_typeid))
279 return ExprError();
Daniel Dunbar380c2132010-05-11 21:32:35 +0000280
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000281 return Owned(new (Context) CXXTypeidExpr(TypeInfoType.withConst(),
282 Operand,
283 SourceRange(TypeidLoc, RParenLoc)));
284}
285
286/// \brief Build a C++ typeid expression with an expression operand.
John McCall60d7b3a2010-08-24 06:29:42 +0000287ExprResult Sema::BuildCXXTypeId(QualType TypeInfoType,
Douglas Gregor4eb4f0f2010-09-08 23:14:30 +0000288 SourceLocation TypeidLoc,
289 Expr *E,
290 SourceLocation RParenLoc) {
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000291 bool isUnevaluatedOperand = true;
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000292 if (E && !E->isTypeDependent()) {
293 QualType T = E->getType();
294 if (const RecordType *RecordT = T->getAs<RecordType>()) {
295 CXXRecordDecl *RecordD = cast<CXXRecordDecl>(RecordT->getDecl());
296 // C++ [expr.typeid]p3:
297 // [...] If the type of the expression is a class type, the class
298 // shall be completely-defined.
299 if (RequireCompleteType(TypeidLoc, T, diag::err_incomplete_typeid))
300 return ExprError();
301
302 // C++ [expr.typeid]p3:
Sebastian Redl906082e2010-07-20 04:20:21 +0000303 // When typeid is applied to an expression other than an glvalue of a
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000304 // polymorphic class type [...] [the] expression is an unevaluated
305 // operand. [...]
Sebastian Redl906082e2010-07-20 04:20:21 +0000306 if (RecordD->isPolymorphic() && E->Classify(Context).isGLValue()) {
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000307 isUnevaluatedOperand = false;
Douglas Gregor6fb745b2010-05-13 16:44:06 +0000308
309 // We require a vtable to query the type at run time.
310 MarkVTableUsed(TypeidLoc, RecordD);
311 }
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000312 }
313
314 // C++ [expr.typeid]p4:
315 // [...] If the type of the type-id is a reference to a possibly
316 // cv-qualified type, the result of the typeid expression refers to a
317 // std::type_info object representing the cv-unqualified referenced
318 // type.
Douglas Gregord1c1d7b2010-06-02 06:16:02 +0000319 Qualifiers Quals;
320 QualType UnqualT = Context.getUnqualifiedArrayType(T, Quals);
321 if (!Context.hasSameType(T, UnqualT)) {
322 T = UnqualT;
John McCall2de56d12010-08-25 11:45:40 +0000323 ImpCastExprToType(E, UnqualT, CK_NoOp, CastCategory(E));
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000324 }
325 }
326
327 // If this is an unevaluated operand, clear out the set of
328 // declaration references we have been computing and eliminate any
329 // temporaries introduced in its computation.
330 if (isUnevaluatedOperand)
331 ExprEvalContexts.back().Context = Unevaluated;
332
333 return Owned(new (Context) CXXTypeidExpr(TypeInfoType.withConst(),
John McCall9ae2f072010-08-23 23:25:46 +0000334 E,
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000335 SourceRange(TypeidLoc, RParenLoc)));
336}
337
338/// ActOnCXXTypeidOfType - Parse typeid( type-id ) or typeid (expression);
John McCall60d7b3a2010-08-24 06:29:42 +0000339ExprResult
Sebastian Redlc42e1182008-11-11 11:37:55 +0000340Sema::ActOnCXXTypeid(SourceLocation OpLoc, SourceLocation LParenLoc,
341 bool isType, void *TyOrExpr, SourceLocation RParenLoc) {
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000342 // Find the std::type_info type.
Douglas Gregor7adb10f2009-09-15 22:30:29 +0000343 if (!StdNamespace)
Sebastian Redlf53597f2009-03-15 17:47:39 +0000344 return ExprError(Diag(OpLoc, diag::err_need_header_before_typeid));
Argyrios Kyrtzidise8661902009-08-19 01:28:28 +0000345
Douglas Gregor4eb4f0f2010-09-08 23:14:30 +0000346 if (!CXXTypeInfoDecl) {
347 IdentifierInfo *TypeInfoII = &PP.getIdentifierTable().get("type_info");
348 LookupResult R(*this, TypeInfoII, SourceLocation(), LookupTagName);
349 LookupQualifiedName(R, getStdNamespace());
350 CXXTypeInfoDecl = R.getAsSingle<RecordDecl>();
351 if (!CXXTypeInfoDecl)
352 return ExprError(Diag(OpLoc, diag::err_need_header_before_typeid));
353 }
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000354
Douglas Gregor4eb4f0f2010-09-08 23:14:30 +0000355 QualType TypeInfoType = Context.getTypeDeclType(CXXTypeInfoDecl);
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000356
357 if (isType) {
358 // The operand is a type; handle it as such.
359 TypeSourceInfo *TInfo = 0;
John McCallb3d87482010-08-24 05:47:05 +0000360 QualType T = GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrExpr),
361 &TInfo);
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000362 if (T.isNull())
363 return ExprError();
364
365 if (!TInfo)
366 TInfo = Context.getTrivialTypeSourceInfo(T, OpLoc);
Sebastian Redlc42e1182008-11-11 11:37:55 +0000367
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000368 return BuildCXXTypeId(TypeInfoType, OpLoc, TInfo, RParenLoc);
Douglas Gregorac7610d2009-06-22 20:57:11 +0000369 }
Mike Stump1eb44332009-09-09 15:08:12 +0000370
Douglas Gregor57fdc8a2010-04-26 22:37:10 +0000371 // The operand is an expression.
John McCall9ae2f072010-08-23 23:25:46 +0000372 return BuildCXXTypeId(TypeInfoType, OpLoc, (Expr*)TyOrExpr, RParenLoc);
Sebastian Redlc42e1182008-11-11 11:37:55 +0000373}
374
Francois Pichet01b7c302010-09-08 12:20:18 +0000375/// \brief Build a Microsoft __uuidof expression with a type operand.
376ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType,
377 SourceLocation TypeidLoc,
378 TypeSourceInfo *Operand,
379 SourceLocation RParenLoc) {
380 // FIXME: add __uuidof semantic analysis for type operand.
381 return Owned(new (Context) CXXUuidofExpr(TypeInfoType.withConst(),
382 Operand,
383 SourceRange(TypeidLoc, RParenLoc)));
384}
385
386/// \brief Build a Microsoft __uuidof expression with an expression operand.
387ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType,
388 SourceLocation TypeidLoc,
389 Expr *E,
390 SourceLocation RParenLoc) {
391 // FIXME: add __uuidof semantic analysis for expr operand.
392 return Owned(new (Context) CXXUuidofExpr(TypeInfoType.withConst(),
393 E,
394 SourceRange(TypeidLoc, RParenLoc)));
395}
396
397/// ActOnCXXUuidof - Parse __uuidof( type-id ) or __uuidof (expression);
398ExprResult
399Sema::ActOnCXXUuidof(SourceLocation OpLoc, SourceLocation LParenLoc,
400 bool isType, void *TyOrExpr, SourceLocation RParenLoc) {
401 // If MSVCGuidDecl has not been cached, do the lookup.
402 if (!MSVCGuidDecl) {
403 IdentifierInfo *GuidII = &PP.getIdentifierTable().get("_GUID");
404 LookupResult R(*this, GuidII, SourceLocation(), LookupTagName);
405 LookupQualifiedName(R, Context.getTranslationUnitDecl());
406 MSVCGuidDecl = R.getAsSingle<RecordDecl>();
407 if (!MSVCGuidDecl)
408 return ExprError(Diag(OpLoc, diag::err_need_header_before_ms_uuidof));
409 }
410
411 QualType GuidType = Context.getTypeDeclType(MSVCGuidDecl);
412
413 if (isType) {
414 // The operand is a type; handle it as such.
415 TypeSourceInfo *TInfo = 0;
416 QualType T = GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrExpr),
417 &TInfo);
418 if (T.isNull())
419 return ExprError();
420
421 if (!TInfo)
422 TInfo = Context.getTrivialTypeSourceInfo(T, OpLoc);
423
424 return BuildCXXUuidof(GuidType, OpLoc, TInfo, RParenLoc);
425 }
426
427 // The operand is an expression.
428 return BuildCXXUuidof(GuidType, OpLoc, (Expr*)TyOrExpr, RParenLoc);
429}
430
Steve Naroff1b273c42007-09-16 14:56:35 +0000431/// ActOnCXXBoolLiteral - Parse {true,false} literals.
John McCall60d7b3a2010-08-24 06:29:42 +0000432ExprResult
Steve Naroff1b273c42007-09-16 14:56:35 +0000433Sema::ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) {
Douglas Gregor2f639b92008-10-24 15:36:09 +0000434 assert((Kind == tok::kw_true || Kind == tok::kw_false) &&
Reid Spencer5f016e22007-07-11 17:01:13 +0000435 "Unknown C++ Boolean value!");
Sebastian Redlf53597f2009-03-15 17:47:39 +0000436 return Owned(new (Context) CXXBoolLiteralExpr(Kind == tok::kw_true,
437 Context.BoolTy, OpLoc));
Reid Spencer5f016e22007-07-11 17:01:13 +0000438}
Chris Lattner50dd2892008-02-26 00:51:44 +0000439
Sebastian Redl6e8ed162009-05-10 18:38:11 +0000440/// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
John McCall60d7b3a2010-08-24 06:29:42 +0000441ExprResult
Sebastian Redl6e8ed162009-05-10 18:38:11 +0000442Sema::ActOnCXXNullPtrLiteral(SourceLocation Loc) {
443 return Owned(new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc));
444}
445
Chris Lattner50dd2892008-02-26 00:51:44 +0000446/// ActOnCXXThrow - Parse throw expressions.
John McCall60d7b3a2010-08-24 06:29:42 +0000447ExprResult
John McCall9ae2f072010-08-23 23:25:46 +0000448Sema::ActOnCXXThrow(SourceLocation OpLoc, Expr *Ex) {
Sebastian Redl972041f2009-04-27 20:27:31 +0000449 if (Ex && !Ex->isTypeDependent() && CheckCXXThrowOperand(OpLoc, Ex))
450 return ExprError();
451 return Owned(new (Context) CXXThrowExpr(Ex, Context.VoidTy, OpLoc));
452}
453
454/// CheckCXXThrowOperand - Validate the operand of a throw.
455bool Sema::CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E) {
456 // C++ [except.throw]p3:
Douglas Gregor154fe982009-12-23 22:04:40 +0000457 // A throw-expression initializes a temporary object, called the exception
458 // object, the type of which is determined by removing any top-level
459 // cv-qualifiers from the static type of the operand of throw and adjusting
460 // the type from "array of T" or "function returning T" to "pointer to T"
461 // or "pointer to function returning T", [...]
462 if (E->getType().hasQualifiers())
John McCall2de56d12010-08-25 11:45:40 +0000463 ImpCastExprToType(E, E->getType().getUnqualifiedType(), CK_NoOp,
Sebastian Redl906082e2010-07-20 04:20:21 +0000464 CastCategory(E));
Douglas Gregor154fe982009-12-23 22:04:40 +0000465
Sebastian Redl972041f2009-04-27 20:27:31 +0000466 DefaultFunctionArrayConversion(E);
467
468 // If the type of the exception would be an incomplete type or a pointer
469 // to an incomplete type other than (cv) void the program is ill-formed.
470 QualType Ty = E->getType();
John McCallac418162010-04-22 01:10:34 +0000471 bool isPointer = false;
Ted Kremenek6217b802009-07-29 21:53:49 +0000472 if (const PointerType* Ptr = Ty->getAs<PointerType>()) {
Sebastian Redl972041f2009-04-27 20:27:31 +0000473 Ty = Ptr->getPointeeType();
John McCallac418162010-04-22 01:10:34 +0000474 isPointer = true;
Sebastian Redl972041f2009-04-27 20:27:31 +0000475 }
476 if (!isPointer || !Ty->isVoidType()) {
477 if (RequireCompleteType(ThrowLoc, Ty,
Anders Carlssond497ba72009-08-26 22:59:12 +0000478 PDiag(isPointer ? diag::err_throw_incomplete_ptr
479 : diag::err_throw_incomplete)
480 << E->getSourceRange()))
Sebastian Redl972041f2009-04-27 20:27:31 +0000481 return true;
Rafael Espindola7b9a5aa2010-03-02 21:28:26 +0000482
Douglas Gregorbf422f92010-04-15 18:05:39 +0000483 if (RequireNonAbstractType(ThrowLoc, E->getType(),
484 PDiag(diag::err_throw_abstract_type)
485 << E->getSourceRange()))
486 return true;
Sebastian Redl972041f2009-04-27 20:27:31 +0000487 }
488
John McCallac418162010-04-22 01:10:34 +0000489 // Initialize the exception result. This implicitly weeds out
490 // abstract types or types with inaccessible copy constructors.
Douglas Gregor3c9034c2010-05-15 00:13:29 +0000491 // FIXME: Determine whether we can elide this copy per C++0x [class.copy]p34.
John McCallac418162010-04-22 01:10:34 +0000492 InitializedEntity Entity =
Douglas Gregor3c9034c2010-05-15 00:13:29 +0000493 InitializedEntity::InitializeException(ThrowLoc, E->getType(),
494 /*NRVO=*/false);
John McCall60d7b3a2010-08-24 06:29:42 +0000495 ExprResult Res = PerformCopyInitialization(Entity,
John McCallac418162010-04-22 01:10:34 +0000496 SourceLocation(),
497 Owned(E));
498 if (Res.isInvalid())
499 return true;
500 E = Res.takeAs<Expr>();
Douglas Gregor6fb745b2010-05-13 16:44:06 +0000501
Eli Friedman5ed9b932010-06-03 20:39:03 +0000502 // If the exception has class type, we need additional handling.
503 const RecordType *RecordTy = Ty->getAs<RecordType>();
504 if (!RecordTy)
505 return false;
506 CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl());
507
Douglas Gregor6fb745b2010-05-13 16:44:06 +0000508 // If we are throwing a polymorphic class type or pointer thereof,
509 // exception handling will make use of the vtable.
Eli Friedman5ed9b932010-06-03 20:39:03 +0000510 MarkVTableUsed(ThrowLoc, RD);
511
512 // If the class has a non-trivial destructor, we must be able to call it.
513 if (RD->hasTrivialDestructor())
514 return false;
515
Douglas Gregor1d110e02010-07-01 14:13:13 +0000516 CXXDestructorDecl *Destructor
Douglas Gregordb89f282010-07-01 22:47:18 +0000517 = const_cast<CXXDestructorDecl*>(LookupDestructor(RD));
Eli Friedman5ed9b932010-06-03 20:39:03 +0000518 if (!Destructor)
519 return false;
520
521 MarkDeclarationReferenced(E->getExprLoc(), Destructor);
522 CheckDestructorAccess(E->getExprLoc(), Destructor,
Douglas Gregored8abf12010-07-08 06:14:04 +0000523 PDiag(diag::err_access_dtor_exception) << Ty);
Sebastian Redl972041f2009-04-27 20:27:31 +0000524 return false;
Chris Lattner50dd2892008-02-26 00:51:44 +0000525}
Argyrios Kyrtzidis07952322008-07-01 10:37:29 +0000526
John McCall60d7b3a2010-08-24 06:29:42 +0000527ExprResult Sema::ActOnCXXThis(SourceLocation ThisLoc) {
Argyrios Kyrtzidis07952322008-07-01 10:37:29 +0000528 /// C++ 9.3.2: In the body of a non-static member function, the keyword this
529 /// is a non-lvalue expression whose value is the address of the object for
530 /// which the function is called.
531
John McCallea1471e2010-05-20 01:18:31 +0000532 DeclContext *DC = getFunctionLevelDeclContext();
533 if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DC))
Argyrios Kyrtzidis07952322008-07-01 10:37:29 +0000534 if (MD->isInstance())
Sebastian Redlf53597f2009-03-15 17:47:39 +0000535 return Owned(new (Context) CXXThisExpr(ThisLoc,
Douglas Gregor828a1972010-01-07 23:12:05 +0000536 MD->getThisType(Context),
537 /*isImplicit=*/false));
Argyrios Kyrtzidis07952322008-07-01 10:37:29 +0000538
Sebastian Redlf53597f2009-03-15 17:47:39 +0000539 return ExprError(Diag(ThisLoc, diag::err_invalid_this_use));
Argyrios Kyrtzidis07952322008-07-01 10:37:29 +0000540}
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000541
John McCall60d7b3a2010-08-24 06:29:42 +0000542ExprResult
Douglas Gregorab6677e2010-09-08 00:15:04 +0000543Sema::ActOnCXXTypeConstructExpr(ParsedType TypeRep,
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000544 SourceLocation LParenLoc,
Sebastian Redlf53597f2009-03-15 17:47:39 +0000545 MultiExprArg exprs,
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000546 SourceLocation RParenLoc) {
Douglas Gregorae4c77d2010-02-05 19:11:37 +0000547 if (!TypeRep)
548 return ExprError();
Douglas Gregorab6677e2010-09-08 00:15:04 +0000549
John McCall9d125032010-01-15 18:39:57 +0000550 TypeSourceInfo *TInfo;
551 QualType Ty = GetTypeFromParser(TypeRep, &TInfo);
552 if (!TInfo)
553 TInfo = Context.getTrivialTypeSourceInfo(Ty, SourceLocation());
Douglas Gregorab6677e2010-09-08 00:15:04 +0000554
555 return BuildCXXTypeConstructExpr(TInfo, LParenLoc, exprs, RParenLoc);
556}
557
558/// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
559/// Can be interpreted either as function-style casting ("int(x)")
560/// or class type construction ("ClassType(x,y,z)")
561/// or creation of a value-initialized type ("int()").
562ExprResult
563Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo,
564 SourceLocation LParenLoc,
565 MultiExprArg exprs,
566 SourceLocation RParenLoc) {
567 QualType Ty = TInfo->getType();
Sebastian Redlf53597f2009-03-15 17:47:39 +0000568 unsigned NumExprs = exprs.size();
569 Expr **Exprs = (Expr**)exprs.get();
Douglas Gregorab6677e2010-09-08 00:15:04 +0000570 SourceLocation TyBeginLoc = TInfo->getTypeLoc().getBeginLoc();
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000571 SourceRange FullRange = SourceRange(TyBeginLoc, RParenLoc);
572
Sebastian Redlf53597f2009-03-15 17:47:39 +0000573 if (Ty->isDependentType() ||
Douglas Gregorba498172009-03-13 21:01:28 +0000574 CallExpr::hasAnyTypeDependentArguments(Exprs, NumExprs)) {
Sebastian Redlf53597f2009-03-15 17:47:39 +0000575 exprs.release();
Mike Stump1eb44332009-09-09 15:08:12 +0000576
Douglas Gregorab6677e2010-09-08 00:15:04 +0000577 return Owned(CXXUnresolvedConstructExpr::Create(Context, TInfo,
Douglas Gregord81e6ca2009-05-20 18:46:25 +0000578 LParenLoc,
579 Exprs, NumExprs,
580 RParenLoc));
Douglas Gregorba498172009-03-13 21:01:28 +0000581 }
582
Anders Carlssonbb60a502009-08-27 03:53:50 +0000583 if (Ty->isArrayType())
584 return ExprError(Diag(TyBeginLoc,
585 diag::err_value_init_for_array_type) << FullRange);
586 if (!Ty->isVoidType() &&
587 RequireCompleteType(TyBeginLoc, Ty,
588 PDiag(diag::err_invalid_incomplete_type_use)
589 << FullRange))
590 return ExprError();
Fariborz Jahanianf071e9b2009-10-23 21:01:39 +0000591
Anders Carlssonbb60a502009-08-27 03:53:50 +0000592 if (RequireNonAbstractType(TyBeginLoc, Ty,
593 diag::err_allocation_of_abstract_type))
594 return ExprError();
Mike Stump1eb44332009-09-09 15:08:12 +0000595
596
Douglas Gregor506ae412009-01-16 18:33:17 +0000597 // C++ [expr.type.conv]p1:
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000598 // If the expression list is a single expression, the type conversion
599 // expression is equivalent (in definedness, and if defined in meaning) to the
600 // corresponding cast expression.
601 //
602 if (NumExprs == 1) {
John McCall2de56d12010-08-25 11:45:40 +0000603 CastKind Kind = CK_Unknown;
John McCallf871d0c2010-08-07 06:22:56 +0000604 CXXCastPath BasePath;
Douglas Gregorab6677e2010-09-08 00:15:04 +0000605 if (CheckCastTypes(TInfo->getTypeLoc().getSourceRange(), Ty, Exprs[0],
606 Kind, BasePath,
Anders Carlsson5cf86ba2010-04-24 19:06:50 +0000607 /*FunctionalStyle=*/true))
Sebastian Redlf53597f2009-03-15 17:47:39 +0000608 return ExprError();
Anders Carlsson0aebc812009-09-09 21:33:21 +0000609
610 exprs.release();
Anders Carlsson0aebc812009-09-09 21:33:21 +0000611
John McCallf871d0c2010-08-07 06:22:56 +0000612 return Owned(CXXFunctionalCastExpr::Create(Context,
Douglas Gregorab6677e2010-09-08 00:15:04 +0000613 Ty.getNonLValueExprType(Context),
John McCallf871d0c2010-08-07 06:22:56 +0000614 TInfo, TyBeginLoc, Kind,
615 Exprs[0], &BasePath,
616 RParenLoc));
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000617 }
618
Douglas Gregor19311e72010-09-08 21:40:08 +0000619 InitializedEntity Entity = InitializedEntity::InitializeTemporary(TInfo);
620 InitializationKind Kind
621 = NumExprs ? InitializationKind::CreateDirect(TyBeginLoc,
622 LParenLoc, RParenLoc)
623 : InitializationKind::CreateValue(TyBeginLoc,
624 LParenLoc, RParenLoc);
625 InitializationSequence InitSeq(*this, Entity, Kind, Exprs, NumExprs);
626 ExprResult Result = InitSeq.Perform(*this, Entity, Kind, move(exprs));
Sebastian Redlf53597f2009-03-15 17:47:39 +0000627
Douglas Gregor19311e72010-09-08 21:40:08 +0000628 // FIXME: Improve AST representation?
629 return move(Result);
Argyrios Kyrtzidis987a14b2008-08-22 15:38:55 +0000630}
Argyrios Kyrtzidis59210932008-09-10 02:17:11 +0000631
632
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000633/// ActOnCXXNew - Parsed a C++ 'new' expression (C++ 5.3.4), as in e.g.:
634/// @code new (memory) int[size][4] @endcode
635/// or
636/// @code ::new Foo(23, "hello") @endcode
637/// For the interpretation of this heap of arguments, consult the base version.
John McCall60d7b3a2010-08-24 06:29:42 +0000638ExprResult
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000639Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
Sebastian Redlf53597f2009-03-15 17:47:39 +0000640 SourceLocation PlacementLParen, MultiExprArg PlacementArgs,
Douglas Gregor4bd40312010-07-13 15:54:32 +0000641 SourceLocation PlacementRParen, SourceRange TypeIdParens,
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000642 Declarator &D, SourceLocation ConstructorLParen,
Sebastian Redlf53597f2009-03-15 17:47:39 +0000643 MultiExprArg ConstructorArgs,
Mike Stump1eb44332009-09-09 15:08:12 +0000644 SourceLocation ConstructorRParen) {
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000645 Expr *ArraySize = 0;
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000646 // If the specified type is an array, unwrap it and save the expression.
647 if (D.getNumTypeObjects() > 0 &&
648 D.getTypeObject(0).Kind == DeclaratorChunk::Array) {
649 DeclaratorChunk &Chunk = D.getTypeObject(0);
650 if (Chunk.Arr.hasStatic)
Sebastian Redlf53597f2009-03-15 17:47:39 +0000651 return ExprError(Diag(Chunk.Loc, diag::err_static_illegal_in_new)
652 << D.getSourceRange());
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000653 if (!Chunk.Arr.NumElts)
Sebastian Redlf53597f2009-03-15 17:47:39 +0000654 return ExprError(Diag(Chunk.Loc, diag::err_array_new_needs_size)
655 << D.getSourceRange());
Sebastian Redl8ce35b02009-10-25 21:45:37 +0000656
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000657 ArraySize = static_cast<Expr*>(Chunk.Arr.NumElts);
Sebastian Redl8ce35b02009-10-25 21:45:37 +0000658 D.DropFirstTypeObject();
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000659 }
660
Douglas Gregor043cad22009-09-11 00:18:58 +0000661 // Every dimension shall be of constant size.
Sebastian Redl8ce35b02009-10-25 21:45:37 +0000662 if (ArraySize) {
663 for (unsigned I = 0, N = D.getNumTypeObjects(); I < N; ++I) {
Douglas Gregor043cad22009-09-11 00:18:58 +0000664 if (D.getTypeObject(I).Kind != DeclaratorChunk::Array)
665 break;
666
667 DeclaratorChunk::ArrayTypeInfo &Array = D.getTypeObject(I).Arr;
668 if (Expr *NumElts = (Expr *)Array.NumElts) {
669 if (!NumElts->isTypeDependent() && !NumElts->isValueDependent() &&
670 !NumElts->isIntegerConstantExpr(Context)) {
671 Diag(D.getTypeObject(I).Loc, diag::err_new_array_nonconst)
672 << NumElts->getSourceRange();
673 return ExprError();
674 }
675 }
676 }
677 }
Sebastian Redl8ce35b02009-10-25 21:45:37 +0000678
John McCallbf1a0282010-06-04 23:28:52 +0000679 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, /*Scope=*/0);
680 QualType AllocType = TInfo->getType();
Chris Lattnereaaebc72009-04-25 08:06:05 +0000681 if (D.isInvalidType())
Sebastian Redlf53597f2009-03-15 17:47:39 +0000682 return ExprError();
Ted Kremenekf9d5bac2010-06-25 22:48:49 +0000683
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000684 if (!TInfo)
685 TInfo = Context.getTrivialTypeSourceInfo(AllocType);
686
Ted Kremenekf9d5bac2010-06-25 22:48:49 +0000687 SourceRange R = TInfo->getTypeLoc().getSourceRange();
Mike Stump1eb44332009-09-09 15:08:12 +0000688 return BuildCXXNew(StartLoc, UseGlobal,
Douglas Gregor3433cf72009-05-21 00:00:09 +0000689 PlacementLParen,
Mike Stump1eb44332009-09-09 15:08:12 +0000690 move(PlacementArgs),
Douglas Gregor3433cf72009-05-21 00:00:09 +0000691 PlacementRParen,
Douglas Gregor4bd40312010-07-13 15:54:32 +0000692 TypeIdParens,
Mike Stump1eb44332009-09-09 15:08:12 +0000693 AllocType,
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000694 TInfo,
John McCall9ae2f072010-08-23 23:25:46 +0000695 ArraySize,
Douglas Gregor3433cf72009-05-21 00:00:09 +0000696 ConstructorLParen,
697 move(ConstructorArgs),
698 ConstructorRParen);
699}
700
John McCall60d7b3a2010-08-24 06:29:42 +0000701ExprResult
Douglas Gregor3433cf72009-05-21 00:00:09 +0000702Sema::BuildCXXNew(SourceLocation StartLoc, bool UseGlobal,
703 SourceLocation PlacementLParen,
704 MultiExprArg PlacementArgs,
705 SourceLocation PlacementRParen,
Douglas Gregor4bd40312010-07-13 15:54:32 +0000706 SourceRange TypeIdParens,
Douglas Gregor3433cf72009-05-21 00:00:09 +0000707 QualType AllocType,
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000708 TypeSourceInfo *AllocTypeInfo,
John McCall9ae2f072010-08-23 23:25:46 +0000709 Expr *ArraySize,
Douglas Gregor3433cf72009-05-21 00:00:09 +0000710 SourceLocation ConstructorLParen,
711 MultiExprArg ConstructorArgs,
712 SourceLocation ConstructorRParen) {
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000713 SourceRange TypeRange = AllocTypeInfo->getTypeLoc().getSourceRange();
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000714
Douglas Gregor3caf04e2010-05-16 16:01:03 +0000715 // Per C++0x [expr.new]p5, the type being constructed may be a
716 // typedef of an array type.
John McCall9ae2f072010-08-23 23:25:46 +0000717 if (!ArraySize) {
Douglas Gregor3caf04e2010-05-16 16:01:03 +0000718 if (const ConstantArrayType *Array
719 = Context.getAsConstantArrayType(AllocType)) {
Argyrios Kyrtzidis9996a7f2010-08-28 09:06:06 +0000720 ArraySize = IntegerLiteral::Create(Context, Array->getSize(),
721 Context.getSizeType(),
722 TypeRange.getEnd());
Douglas Gregor3caf04e2010-05-16 16:01:03 +0000723 AllocType = Array->getElementType();
724 }
725 }
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000726
Douglas Gregora0750762010-10-06 16:00:31 +0000727 if (CheckAllocatedType(AllocType, TypeRange.getBegin(), TypeRange))
728 return ExprError();
729
Douglas Gregor3caf04e2010-05-16 16:01:03 +0000730 QualType ResultType = Context.getPointerType(AllocType);
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000731
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000732 // C++ 5.3.4p6: "The expression in a direct-new-declarator shall have integral
733 // or enumeration type with a non-negative value."
Sebastian Redl28507842009-02-26 14:39:58 +0000734 if (ArraySize && !ArraySize->isTypeDependent()) {
Douglas Gregor6bc574d2010-06-30 00:20:43 +0000735
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000736 QualType SizeType = ArraySize->getType();
Douglas Gregorc30614b2010-06-29 23:17:37 +0000737
John McCall60d7b3a2010-08-24 06:29:42 +0000738 ExprResult ConvertedSize
John McCall9ae2f072010-08-23 23:25:46 +0000739 = ConvertToIntegralOrEnumerationType(StartLoc, ArraySize,
Douglas Gregor6bc574d2010-06-30 00:20:43 +0000740 PDiag(diag::err_array_size_not_integral),
741 PDiag(diag::err_array_size_incomplete_type)
742 << ArraySize->getSourceRange(),
743 PDiag(diag::err_array_size_explicit_conversion),
744 PDiag(diag::note_array_size_conversion),
745 PDiag(diag::err_array_size_ambiguous_conversion),
746 PDiag(diag::note_array_size_conversion),
747 PDiag(getLangOptions().CPlusPlus0x? 0
748 : diag::ext_array_size_conversion));
749 if (ConvertedSize.isInvalid())
750 return ExprError();
751
John McCall9ae2f072010-08-23 23:25:46 +0000752 ArraySize = ConvertedSize.take();
Douglas Gregor6bc574d2010-06-30 00:20:43 +0000753 SizeType = ArraySize->getType();
Douglas Gregor2ade35e2010-06-16 00:17:44 +0000754 if (!SizeType->isIntegralOrEnumerationType())
Douglas Gregor6bc574d2010-06-30 00:20:43 +0000755 return ExprError();
756
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000757 // Let's see if this is a constant < 0. If so, we reject it out of hand.
758 // We don't care about special rules, so we tell the machinery it's not
759 // evaluated - it gives us a result in more cases.
Sebastian Redl28507842009-02-26 14:39:58 +0000760 if (!ArraySize->isValueDependent()) {
761 llvm::APSInt Value;
762 if (ArraySize->isIntegerConstantExpr(Value, Context, 0, false)) {
763 if (Value < llvm::APSInt(
Anders Carlssonac18b2e2009-09-23 00:37:25 +0000764 llvm::APInt::getNullValue(Value.getBitWidth()),
765 Value.isUnsigned()))
Sebastian Redlf53597f2009-03-15 17:47:39 +0000766 return ExprError(Diag(ArraySize->getSourceRange().getBegin(),
Douglas Gregor2767ce22010-08-18 00:39:00 +0000767 diag::err_typecheck_negative_array_size)
Sebastian Redlf53597f2009-03-15 17:47:39 +0000768 << ArraySize->getSourceRange());
Douglas Gregor2767ce22010-08-18 00:39:00 +0000769
770 if (!AllocType->isDependentType()) {
771 unsigned ActiveSizeBits
772 = ConstantArrayType::getNumAddressingBits(Context, AllocType, Value);
773 if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) {
774 Diag(ArraySize->getSourceRange().getBegin(),
775 diag::err_array_too_large)
776 << Value.toString(10)
777 << ArraySize->getSourceRange();
778 return ExprError();
779 }
780 }
Douglas Gregor4bd40312010-07-13 15:54:32 +0000781 } else if (TypeIdParens.isValid()) {
782 // Can't have dynamic array size when the type-id is in parentheses.
783 Diag(ArraySize->getLocStart(), diag::ext_new_paren_array_nonconst)
784 << ArraySize->getSourceRange()
785 << FixItHint::CreateRemoval(TypeIdParens.getBegin())
786 << FixItHint::CreateRemoval(TypeIdParens.getEnd());
787
788 TypeIdParens = SourceRange();
Sebastian Redl28507842009-02-26 14:39:58 +0000789 }
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000790 }
Anders Carlssonac18b2e2009-09-23 00:37:25 +0000791
Eli Friedman73c39ab2009-10-20 08:27:19 +0000792 ImpCastExprToType(ArraySize, Context.getSizeType(),
John McCall2de56d12010-08-25 11:45:40 +0000793 CK_IntegralCast);
Sebastian Redlcee63fb2008-12-02 14:43:59 +0000794 }
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000795
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000796 FunctionDecl *OperatorNew = 0;
797 FunctionDecl *OperatorDelete = 0;
Sebastian Redlf53597f2009-03-15 17:47:39 +0000798 Expr **PlaceArgs = (Expr**)PlacementArgs.get();
799 unsigned NumPlaceArgs = PlacementArgs.size();
Fariborz Jahanian498429f2009-11-19 18:39:40 +0000800
Sebastian Redl28507842009-02-26 14:39:58 +0000801 if (!AllocType->isDependentType() &&
802 !Expr::hasAnyTypeDependentArguments(PlaceArgs, NumPlaceArgs) &&
803 FindAllocationFunctions(StartLoc,
Sebastian Redl00e68e22009-02-09 18:24:27 +0000804 SourceRange(PlacementLParen, PlacementRParen),
805 UseGlobal, AllocType, ArraySize, PlaceArgs,
806 NumPlaceArgs, OperatorNew, OperatorDelete))
Sebastian Redlf53597f2009-03-15 17:47:39 +0000807 return ExprError();
Fariborz Jahanian048f52a2009-11-24 18:29:37 +0000808 llvm::SmallVector<Expr *, 8> AllPlaceArgs;
Fariborz Jahanian498429f2009-11-19 18:39:40 +0000809 if (OperatorNew) {
810 // Add default arguments, if any.
811 const FunctionProtoType *Proto =
812 OperatorNew->getType()->getAs<FunctionProtoType>();
Fariborz Jahanian4cd1c702009-11-24 19:27:49 +0000813 VariadicCallType CallType =
814 Proto->isVariadic() ? VariadicFunction : VariadicDoesNotApply;
Anders Carlsson28e94832010-05-03 02:07:56 +0000815
816 if (GatherArgumentsForCall(PlacementLParen, OperatorNew,
817 Proto, 1, PlaceArgs, NumPlaceArgs,
818 AllPlaceArgs, CallType))
Fariborz Jahanian048f52a2009-11-24 18:29:37 +0000819 return ExprError();
Fariborz Jahanian498429f2009-11-19 18:39:40 +0000820
Fariborz Jahanian498429f2009-11-19 18:39:40 +0000821 NumPlaceArgs = AllPlaceArgs.size();
822 if (NumPlaceArgs > 0)
823 PlaceArgs = &AllPlaceArgs[0];
824 }
825
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000826 bool Init = ConstructorLParen.isValid();
827 // --- Choosing a constructor ---
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000828 CXXConstructorDecl *Constructor = 0;
Sebastian Redlf53597f2009-03-15 17:47:39 +0000829 Expr **ConsArgs = (Expr**)ConstructorArgs.get();
830 unsigned NumConsArgs = ConstructorArgs.size();
John McCallca0408f2010-08-23 06:44:23 +0000831 ASTOwningVector<Expr*> ConvertedConstructorArgs(*this);
Eli Friedmana8ce9ec2009-11-08 22:15:39 +0000832
Anders Carlsson48c95012010-05-03 15:45:23 +0000833 // Array 'new' can't have any initializers.
Anders Carlsson55cbd6e2010-05-16 16:24:20 +0000834 if (NumConsArgs && (ResultType->isArrayType() || ArraySize)) {
Anders Carlsson48c95012010-05-03 15:45:23 +0000835 SourceRange InitRange(ConsArgs[0]->getLocStart(),
836 ConsArgs[NumConsArgs - 1]->getLocEnd());
837
838 Diag(StartLoc, diag::err_new_array_init_args) << InitRange;
839 return ExprError();
840 }
841
Douglas Gregor99a2e602009-12-16 01:38:02 +0000842 if (!AllocType->isDependentType() &&
843 !Expr::hasAnyTypeDependentArguments(ConsArgs, NumConsArgs)) {
844 // C++0x [expr.new]p15:
845 // A new-expression that creates an object of type T initializes that
846 // object as follows:
847 InitializationKind Kind
848 // - If the new-initializer is omitted, the object is default-
849 // initialized (8.5); if no initialization is performed,
850 // the object has indeterminate value
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000851 = !Init? InitializationKind::CreateDefault(TypeRange.getBegin())
Douglas Gregor99a2e602009-12-16 01:38:02 +0000852 // - Otherwise, the new-initializer is interpreted according to the
853 // initialization rules of 8.5 for direct-initialization.
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000854 : InitializationKind::CreateDirect(TypeRange.getBegin(),
Douglas Gregor99a2e602009-12-16 01:38:02 +0000855 ConstructorLParen,
856 ConstructorRParen);
857
Douglas Gregor99a2e602009-12-16 01:38:02 +0000858 InitializedEntity Entity
Douglas Gregord6542d82009-12-22 15:35:07 +0000859 = InitializedEntity::InitializeNew(StartLoc, AllocType);
Douglas Gregor99a2e602009-12-16 01:38:02 +0000860 InitializationSequence InitSeq(*this, Entity, Kind, ConsArgs, NumConsArgs);
John McCall60d7b3a2010-08-24 06:29:42 +0000861 ExprResult FullInit = InitSeq.Perform(*this, Entity, Kind,
Douglas Gregor99a2e602009-12-16 01:38:02 +0000862 move(ConstructorArgs));
863 if (FullInit.isInvalid())
864 return ExprError();
865
866 // FullInit is our initializer; walk through it to determine if it's a
867 // constructor call, which CXXNewExpr handles directly.
868 if (Expr *FullInitExpr = (Expr *)FullInit.get()) {
869 if (CXXBindTemporaryExpr *Binder
870 = dyn_cast<CXXBindTemporaryExpr>(FullInitExpr))
871 FullInitExpr = Binder->getSubExpr();
872 if (CXXConstructExpr *Construct
873 = dyn_cast<CXXConstructExpr>(FullInitExpr)) {
874 Constructor = Construct->getConstructor();
875 for (CXXConstructExpr::arg_iterator A = Construct->arg_begin(),
876 AEnd = Construct->arg_end();
877 A != AEnd; ++A)
878 ConvertedConstructorArgs.push_back(A->Retain());
879 } else {
880 // Take the converted initializer.
881 ConvertedConstructorArgs.push_back(FullInit.release());
882 }
883 } else {
884 // No initialization required.
885 }
886
887 // Take the converted arguments and use them for the new expression.
Douglas Gregor39da0b82009-09-09 23:08:42 +0000888 NumConsArgs = ConvertedConstructorArgs.size();
889 ConsArgs = (Expr **)ConvertedConstructorArgs.take();
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000890 }
Douglas Gregor99a2e602009-12-16 01:38:02 +0000891
Douglas Gregor6d908702010-02-26 05:06:18 +0000892 // Mark the new and delete operators as referenced.
893 if (OperatorNew)
894 MarkDeclarationReferenced(StartLoc, OperatorNew);
895 if (OperatorDelete)
896 MarkDeclarationReferenced(StartLoc, OperatorDelete);
897
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000898 // FIXME: Also check that the destructor is accessible. (C++ 5.3.4p16)
Douglas Gregor089407b2009-10-17 21:40:42 +0000899
Sebastian Redlf53597f2009-03-15 17:47:39 +0000900 PlacementArgs.release();
901 ConstructorArgs.release();
Ted Kremenekf9d5bac2010-06-25 22:48:49 +0000902
Ted Kremenekad7fe862010-02-11 22:51:03 +0000903 return Owned(new (Context) CXXNewExpr(Context, UseGlobal, OperatorNew,
Douglas Gregor4bd40312010-07-13 15:54:32 +0000904 PlaceArgs, NumPlaceArgs, TypeIdParens,
Ted Kremenekad7fe862010-02-11 22:51:03 +0000905 ArraySize, Constructor, Init,
906 ConsArgs, NumConsArgs, OperatorDelete,
Douglas Gregor1bb2a932010-09-07 21:49:58 +0000907 ResultType, AllocTypeInfo,
908 StartLoc,
Ted Kremenekad7fe862010-02-11 22:51:03 +0000909 Init ? ConstructorRParen :
Ted Kremenekf9d5bac2010-06-25 22:48:49 +0000910 TypeRange.getEnd()));
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000911}
912
913/// CheckAllocatedType - Checks that a type is suitable as the allocated type
914/// in a new-expression.
915/// dimension off and stores the size expression in ArraySize.
Douglas Gregor3433cf72009-05-21 00:00:09 +0000916bool Sema::CheckAllocatedType(QualType AllocType, SourceLocation Loc,
Mike Stump1eb44332009-09-09 15:08:12 +0000917 SourceRange R) {
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000918 // C++ 5.3.4p1: "[The] type shall be a complete object type, but not an
919 // abstract class type or array thereof.
Douglas Gregore7450f52009-03-24 19:52:54 +0000920 if (AllocType->isFunctionType())
Douglas Gregor3433cf72009-05-21 00:00:09 +0000921 return Diag(Loc, diag::err_bad_new_type)
922 << AllocType << 0 << R;
Douglas Gregore7450f52009-03-24 19:52:54 +0000923 else if (AllocType->isReferenceType())
Douglas Gregor3433cf72009-05-21 00:00:09 +0000924 return Diag(Loc, diag::err_bad_new_type)
925 << AllocType << 1 << R;
Douglas Gregore7450f52009-03-24 19:52:54 +0000926 else if (!AllocType->isDependentType() &&
Douglas Gregor3433cf72009-05-21 00:00:09 +0000927 RequireCompleteType(Loc, AllocType,
Anders Carlssonb7906612009-08-26 23:45:07 +0000928 PDiag(diag::err_new_incomplete_type)
929 << R))
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000930 return true;
Douglas Gregor3433cf72009-05-21 00:00:09 +0000931 else if (RequireNonAbstractType(Loc, AllocType,
Douglas Gregore7450f52009-03-24 19:52:54 +0000932 diag::err_allocation_of_abstract_type))
933 return true;
Douglas Gregora0750762010-10-06 16:00:31 +0000934 else if (AllocType->isVariablyModifiedType())
935 return Diag(Loc, diag::err_variably_modified_new_type)
936 << AllocType;
937
Sebastian Redl4c5d3202008-11-21 19:14:01 +0000938 return false;
939}
940
Douglas Gregor6d908702010-02-26 05:06:18 +0000941/// \brief Determine whether the given function is a non-placement
942/// deallocation function.
943static bool isNonPlacementDeallocationFunction(FunctionDecl *FD) {
944 if (FD->isInvalidDecl())
945 return false;
946
947 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(FD))
948 return Method->isUsualDeallocationFunction();
949
950 return ((FD->getOverloadedOperator() == OO_Delete ||
951 FD->getOverloadedOperator() == OO_Array_Delete) &&
952 FD->getNumParams() == 1);
953}
954
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000955/// FindAllocationFunctions - Finds the overloads of operator new and delete
956/// that are appropriate for the allocation.
Sebastian Redl00e68e22009-02-09 18:24:27 +0000957bool Sema::FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
958 bool UseGlobal, QualType AllocType,
959 bool IsArray, Expr **PlaceArgs,
960 unsigned NumPlaceArgs,
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000961 FunctionDecl *&OperatorNew,
Mike Stump1eb44332009-09-09 15:08:12 +0000962 FunctionDecl *&OperatorDelete) {
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000963 // --- Choosing an allocation function ---
964 // C++ 5.3.4p8 - 14 & 18
965 // 1) If UseGlobal is true, only look in the global scope. Else, also look
966 // in the scope of the allocated class.
967 // 2) If an array size is given, look for operator new[], else look for
968 // operator new.
969 // 3) The first argument is always size_t. Append the arguments from the
970 // placement form.
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000971
972 llvm::SmallVector<Expr*, 8> AllocArgs(1 + NumPlaceArgs);
973 // We don't care about the actual value of this argument.
974 // FIXME: Should the Sema create the expression and embed it in the syntax
975 // tree? Or should the consumer just recalculate the value?
Argyrios Kyrtzidis9996a7f2010-08-28 09:06:06 +0000976 IntegerLiteral Size(Context, llvm::APInt::getNullValue(
Anders Carlssond67c4c32009-08-16 20:29:29 +0000977 Context.Target.getPointerWidth(0)),
978 Context.getSizeType(),
979 SourceLocation());
980 AllocArgs[0] = &Size;
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000981 std::copy(PlaceArgs, PlaceArgs + NumPlaceArgs, AllocArgs.begin() + 1);
982
Douglas Gregor6d908702010-02-26 05:06:18 +0000983 // C++ [expr.new]p8:
984 // If the allocated type is a non-array type, the allocation
985 // function’s name is operator new and the deallocation function’s
986 // name is operator delete. If the allocated type is an array
987 // type, the allocation function’s name is operator new[] and the
988 // deallocation function’s name is operator delete[].
Sebastian Redlb5a57a62008-12-03 20:26:15 +0000989 DeclarationName NewName = Context.DeclarationNames.getCXXOperatorName(
990 IsArray ? OO_Array_New : OO_New);
Douglas Gregor6d908702010-02-26 05:06:18 +0000991 DeclarationName DeleteName = Context.DeclarationNames.getCXXOperatorName(
992 IsArray ? OO_Array_Delete : OO_Delete);
993
Argyrios Kyrtzidisd2932982010-08-25 23:14:56 +0000994 QualType AllocElemType = Context.getBaseElementType(AllocType);
995
996 if (AllocElemType->isRecordType() && !UseGlobal) {
Mike Stump1eb44332009-09-09 15:08:12 +0000997 CXXRecordDecl *Record
Argyrios Kyrtzidisd2932982010-08-25 23:14:56 +0000998 = cast<CXXRecordDecl>(AllocElemType->getAs<RecordType>()->getDecl());
Sebastian Redl00e68e22009-02-09 18:24:27 +0000999 if (FindAllocationOverload(StartLoc, Range, NewName, &AllocArgs[0],
Sebastian Redl7f662392008-12-04 22:20:51 +00001000 AllocArgs.size(), Record, /*AllowMissing=*/true,
1001 OperatorNew))
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001002 return true;
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001003 }
1004 if (!OperatorNew) {
1005 // Didn't find a member overload. Look for a global one.
1006 DeclareGlobalNewDelete();
Sebastian Redl7f662392008-12-04 22:20:51 +00001007 DeclContext *TUDecl = Context.getTranslationUnitDecl();
Sebastian Redl00e68e22009-02-09 18:24:27 +00001008 if (FindAllocationOverload(StartLoc, Range, NewName, &AllocArgs[0],
Sebastian Redl7f662392008-12-04 22:20:51 +00001009 AllocArgs.size(), TUDecl, /*AllowMissing=*/false,
1010 OperatorNew))
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001011 return true;
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001012 }
1013
John McCall9c82afc2010-04-20 02:18:25 +00001014 // We don't need an operator delete if we're running under
1015 // -fno-exceptions.
1016 if (!getLangOptions().Exceptions) {
1017 OperatorDelete = 0;
1018 return false;
1019 }
1020
Anders Carlssond9583892009-05-31 20:26:12 +00001021 // FindAllocationOverload can change the passed in arguments, so we need to
1022 // copy them back.
1023 if (NumPlaceArgs > 0)
1024 std::copy(&AllocArgs[1], AllocArgs.end(), PlaceArgs);
Mike Stump1eb44332009-09-09 15:08:12 +00001025
Douglas Gregor6d908702010-02-26 05:06:18 +00001026 // C++ [expr.new]p19:
1027 //
1028 // If the new-expression begins with a unary :: operator, the
1029 // deallocation function’s name is looked up in the global
1030 // scope. Otherwise, if the allocated type is a class type T or an
1031 // array thereof, the deallocation function’s name is looked up in
1032 // the scope of T. If this lookup fails to find the name, or if
1033 // the allocated type is not a class type or array thereof, the
1034 // deallocation function’s name is looked up in the global scope.
1035 LookupResult FoundDelete(*this, DeleteName, StartLoc, LookupOrdinaryName);
Argyrios Kyrtzidisd2932982010-08-25 23:14:56 +00001036 if (AllocElemType->isRecordType() && !UseGlobal) {
Douglas Gregor6d908702010-02-26 05:06:18 +00001037 CXXRecordDecl *RD
Argyrios Kyrtzidisd2932982010-08-25 23:14:56 +00001038 = cast<CXXRecordDecl>(AllocElemType->getAs<RecordType>()->getDecl());
Douglas Gregor6d908702010-02-26 05:06:18 +00001039 LookupQualifiedName(FoundDelete, RD);
1040 }
John McCall90c8c572010-03-18 08:19:33 +00001041 if (FoundDelete.isAmbiguous())
1042 return true; // FIXME: clean up expressions?
Douglas Gregor6d908702010-02-26 05:06:18 +00001043
1044 if (FoundDelete.empty()) {
1045 DeclareGlobalNewDelete();
1046 LookupQualifiedName(FoundDelete, Context.getTranslationUnitDecl());
1047 }
1048
1049 FoundDelete.suppressDiagnostics();
John McCall9aa472c2010-03-19 07:35:19 +00001050
1051 llvm::SmallVector<std::pair<DeclAccessPair,FunctionDecl*>, 2> Matches;
1052
John McCalledeb6c92010-09-14 21:34:24 +00001053 // Whether we're looking for a placement operator delete is dictated
1054 // by whether we selected a placement operator new, not by whether
1055 // we had explicit placement arguments. This matters for things like
1056 // struct A { void *operator new(size_t, int = 0); ... };
1057 // A *a = new A()
1058 bool isPlacementNew = (NumPlaceArgs > 0 || OperatorNew->param_size() != 1);
1059
1060 if (isPlacementNew) {
Douglas Gregor6d908702010-02-26 05:06:18 +00001061 // C++ [expr.new]p20:
1062 // A declaration of a placement deallocation function matches the
1063 // declaration of a placement allocation function if it has the
1064 // same number of parameters and, after parameter transformations
1065 // (8.3.5), all parameter types except the first are
1066 // identical. [...]
1067 //
1068 // To perform this comparison, we compute the function type that
1069 // the deallocation function should have, and use that type both
1070 // for template argument deduction and for comparison purposes.
1071 QualType ExpectedFunctionType;
1072 {
1073 const FunctionProtoType *Proto
1074 = OperatorNew->getType()->getAs<FunctionProtoType>();
1075 llvm::SmallVector<QualType, 4> ArgTypes;
1076 ArgTypes.push_back(Context.VoidPtrTy);
1077 for (unsigned I = 1, N = Proto->getNumArgs(); I < N; ++I)
1078 ArgTypes.push_back(Proto->getArgType(I));
1079
1080 ExpectedFunctionType
1081 = Context.getFunctionType(Context.VoidTy, ArgTypes.data(),
1082 ArgTypes.size(),
1083 Proto->isVariadic(),
Rafael Espindola264ba482010-03-30 20:24:48 +00001084 0, false, false, 0, 0,
1085 FunctionType::ExtInfo());
Douglas Gregor6d908702010-02-26 05:06:18 +00001086 }
1087
1088 for (LookupResult::iterator D = FoundDelete.begin(),
1089 DEnd = FoundDelete.end();
1090 D != DEnd; ++D) {
1091 FunctionDecl *Fn = 0;
1092 if (FunctionTemplateDecl *FnTmpl
1093 = dyn_cast<FunctionTemplateDecl>((*D)->getUnderlyingDecl())) {
1094 // Perform template argument deduction to try to match the
1095 // expected function type.
1096 TemplateDeductionInfo Info(Context, StartLoc);
1097 if (DeduceTemplateArguments(FnTmpl, 0, ExpectedFunctionType, Fn, Info))
1098 continue;
1099 } else
1100 Fn = cast<FunctionDecl>((*D)->getUnderlyingDecl());
1101
1102 if (Context.hasSameType(Fn->getType(), ExpectedFunctionType))
John McCall9aa472c2010-03-19 07:35:19 +00001103 Matches.push_back(std::make_pair(D.getPair(), Fn));
Douglas Gregor6d908702010-02-26 05:06:18 +00001104 }
1105 } else {
1106 // C++ [expr.new]p20:
1107 // [...] Any non-placement deallocation function matches a
1108 // non-placement allocation function. [...]
1109 for (LookupResult::iterator D = FoundDelete.begin(),
1110 DEnd = FoundDelete.end();
1111 D != DEnd; ++D) {
1112 if (FunctionDecl *Fn = dyn_cast<FunctionDecl>((*D)->getUnderlyingDecl()))
1113 if (isNonPlacementDeallocationFunction(Fn))
John McCall9aa472c2010-03-19 07:35:19 +00001114 Matches.push_back(std::make_pair(D.getPair(), Fn));
Douglas Gregor6d908702010-02-26 05:06:18 +00001115 }
1116 }
1117
1118 // C++ [expr.new]p20:
1119 // [...] If the lookup finds a single matching deallocation
1120 // function, that function will be called; otherwise, no
1121 // deallocation function will be called.
1122 if (Matches.size() == 1) {
John McCall9aa472c2010-03-19 07:35:19 +00001123 OperatorDelete = Matches[0].second;
Douglas Gregor6d908702010-02-26 05:06:18 +00001124
1125 // C++0x [expr.new]p20:
1126 // If the lookup finds the two-parameter form of a usual
1127 // deallocation function (3.7.4.2) and that function, considered
1128 // as a placement deallocation function, would have been
1129 // selected as a match for the allocation function, the program
1130 // is ill-formed.
1131 if (NumPlaceArgs && getLangOptions().CPlusPlus0x &&
1132 isNonPlacementDeallocationFunction(OperatorDelete)) {
1133 Diag(StartLoc, diag::err_placement_new_non_placement_delete)
1134 << SourceRange(PlaceArgs[0]->getLocStart(),
1135 PlaceArgs[NumPlaceArgs - 1]->getLocEnd());
1136 Diag(OperatorDelete->getLocation(), diag::note_previous_decl)
1137 << DeleteName;
John McCall90c8c572010-03-18 08:19:33 +00001138 } else {
1139 CheckAllocationAccess(StartLoc, Range, FoundDelete.getNamingClass(),
John McCall9aa472c2010-03-19 07:35:19 +00001140 Matches[0].first);
Douglas Gregor6d908702010-02-26 05:06:18 +00001141 }
1142 }
1143
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001144 return false;
1145}
1146
Sebastian Redl7f662392008-12-04 22:20:51 +00001147/// FindAllocationOverload - Find an fitting overload for the allocation
1148/// function in the specified scope.
Sebastian Redl00e68e22009-02-09 18:24:27 +00001149bool Sema::FindAllocationOverload(SourceLocation StartLoc, SourceRange Range,
1150 DeclarationName Name, Expr** Args,
1151 unsigned NumArgs, DeclContext *Ctx,
Mike Stump1eb44332009-09-09 15:08:12 +00001152 bool AllowMissing, FunctionDecl *&Operator) {
John McCalla24dc2e2009-11-17 02:14:36 +00001153 LookupResult R(*this, Name, StartLoc, LookupOrdinaryName);
1154 LookupQualifiedName(R, Ctx);
John McCallf36e02d2009-10-09 21:13:30 +00001155 if (R.empty()) {
Sebastian Redl7f662392008-12-04 22:20:51 +00001156 if (AllowMissing)
1157 return false;
Sebastian Redl7f662392008-12-04 22:20:51 +00001158 return Diag(StartLoc, diag::err_ovl_no_viable_function_in_call)
Chris Lattner4330d652009-02-17 07:29:20 +00001159 << Name << Range;
Sebastian Redl7f662392008-12-04 22:20:51 +00001160 }
1161
John McCall90c8c572010-03-18 08:19:33 +00001162 if (R.isAmbiguous())
1163 return true;
1164
1165 R.suppressDiagnostics();
John McCallf36e02d2009-10-09 21:13:30 +00001166
John McCall5769d612010-02-08 23:07:23 +00001167 OverloadCandidateSet Candidates(StartLoc);
Douglas Gregor5d64e5b2009-09-30 00:03:47 +00001168 for (LookupResult::iterator Alloc = R.begin(), AllocEnd = R.end();
1169 Alloc != AllocEnd; ++Alloc) {
Douglas Gregor3fc749d2008-12-23 00:26:44 +00001170 // Even member operator new/delete are implicitly treated as
1171 // static, so don't use AddMemberCandidate.
John McCall9aa472c2010-03-19 07:35:19 +00001172 NamedDecl *D = (*Alloc)->getUnderlyingDecl();
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001173
John McCall9aa472c2010-03-19 07:35:19 +00001174 if (FunctionTemplateDecl *FnTemplate = dyn_cast<FunctionTemplateDecl>(D)) {
1175 AddTemplateOverloadCandidate(FnTemplate, Alloc.getPair(),
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001176 /*ExplicitTemplateArgs=*/0, Args, NumArgs,
1177 Candidates,
1178 /*SuppressUserConversions=*/false);
Douglas Gregor90916562009-09-29 18:16:17 +00001179 continue;
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001180 }
1181
John McCall9aa472c2010-03-19 07:35:19 +00001182 FunctionDecl *Fn = cast<FunctionDecl>(D);
1183 AddOverloadCandidate(Fn, Alloc.getPair(), Args, NumArgs, Candidates,
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001184 /*SuppressUserConversions=*/false);
Sebastian Redl7f662392008-12-04 22:20:51 +00001185 }
1186
1187 // Do the resolution.
1188 OverloadCandidateSet::iterator Best;
John McCall120d63c2010-08-24 20:38:10 +00001189 switch (Candidates.BestViableFunction(*this, StartLoc, Best)) {
Sebastian Redl7f662392008-12-04 22:20:51 +00001190 case OR_Success: {
1191 // Got one!
1192 FunctionDecl *FnDecl = Best->Function;
1193 // The first argument is size_t, and the first parameter must be size_t,
1194 // too. This is checked on declaration and can be assumed. (It can't be
1195 // asserted on, though, since invalid decls are left in there.)
John McCall90c8c572010-03-18 08:19:33 +00001196 // Watch out for variadic allocator function.
Fariborz Jahanian048f52a2009-11-24 18:29:37 +00001197 unsigned NumArgsInFnDecl = FnDecl->getNumParams();
1198 for (unsigned i = 0; (i < NumArgs && i < NumArgsInFnDecl); ++i) {
John McCall60d7b3a2010-08-24 06:29:42 +00001199 ExprResult Result
Douglas Gregor29ecaba2010-03-26 20:35:59 +00001200 = PerformCopyInitialization(InitializedEntity::InitializeParameter(
Fariborz Jahanian745da3a2010-09-24 17:30:16 +00001201 Context,
Douglas Gregor29ecaba2010-03-26 20:35:59 +00001202 FnDecl->getParamDecl(i)),
1203 SourceLocation(),
1204 Owned(Args[i]->Retain()));
1205 if (Result.isInvalid())
Sebastian Redl7f662392008-12-04 22:20:51 +00001206 return true;
Douglas Gregor29ecaba2010-03-26 20:35:59 +00001207
1208 Args[i] = Result.takeAs<Expr>();
Sebastian Redl7f662392008-12-04 22:20:51 +00001209 }
1210 Operator = FnDecl;
John McCall9aa472c2010-03-19 07:35:19 +00001211 CheckAllocationAccess(StartLoc, Range, R.getNamingClass(), Best->FoundDecl);
Sebastian Redl7f662392008-12-04 22:20:51 +00001212 return false;
1213 }
1214
1215 case OR_No_Viable_Function:
Sebastian Redl7f662392008-12-04 22:20:51 +00001216 Diag(StartLoc, diag::err_ovl_no_viable_function_in_call)
Chris Lattner4330d652009-02-17 07:29:20 +00001217 << Name << Range;
John McCall120d63c2010-08-24 20:38:10 +00001218 Candidates.NoteCandidates(*this, OCD_AllCandidates, Args, NumArgs);
Sebastian Redl7f662392008-12-04 22:20:51 +00001219 return true;
1220
1221 case OR_Ambiguous:
Sebastian Redl7f662392008-12-04 22:20:51 +00001222 Diag(StartLoc, diag::err_ovl_ambiguous_call)
Sebastian Redl00e68e22009-02-09 18:24:27 +00001223 << Name << Range;
John McCall120d63c2010-08-24 20:38:10 +00001224 Candidates.NoteCandidates(*this, OCD_ViableCandidates, Args, NumArgs);
Sebastian Redl7f662392008-12-04 22:20:51 +00001225 return true;
Douglas Gregor48f3bb92009-02-18 21:56:37 +00001226
1227 case OR_Deleted:
1228 Diag(StartLoc, diag::err_ovl_deleted_call)
1229 << Best->Function->isDeleted()
1230 << Name << Range;
John McCall120d63c2010-08-24 20:38:10 +00001231 Candidates.NoteCandidates(*this, OCD_AllCandidates, Args, NumArgs);
Douglas Gregor48f3bb92009-02-18 21:56:37 +00001232 return true;
Sebastian Redl7f662392008-12-04 22:20:51 +00001233 }
1234 assert(false && "Unreachable, bad result from BestViableFunction");
1235 return true;
1236}
1237
1238
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001239/// DeclareGlobalNewDelete - Declare the global forms of operator new and
1240/// delete. These are:
1241/// @code
1242/// void* operator new(std::size_t) throw(std::bad_alloc);
1243/// void* operator new[](std::size_t) throw(std::bad_alloc);
1244/// void operator delete(void *) throw();
1245/// void operator delete[](void *) throw();
1246/// @endcode
1247/// Note that the placement and nothrow forms of new are *not* implicitly
1248/// declared. Their use requires including \<new\>.
Mike Stump1eb44332009-09-09 15:08:12 +00001249void Sema::DeclareGlobalNewDelete() {
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001250 if (GlobalNewDeleteDeclared)
1251 return;
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001252
1253 // C++ [basic.std.dynamic]p2:
1254 // [...] The following allocation and deallocation functions (18.4) are
1255 // implicitly declared in global scope in each translation unit of a
1256 // program
1257 //
1258 // void* operator new(std::size_t) throw(std::bad_alloc);
1259 // void* operator new[](std::size_t) throw(std::bad_alloc);
1260 // void operator delete(void*) throw();
1261 // void operator delete[](void*) throw();
1262 //
1263 // These implicit declarations introduce only the function names operator
1264 // new, operator new[], operator delete, operator delete[].
1265 //
1266 // Here, we need to refer to std::bad_alloc, so we will implicitly declare
1267 // "std" or "bad_alloc" as necessary to form the exception specification.
1268 // However, we do not make these implicit declarations visible to name
1269 // lookup.
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001270 if (!StdBadAlloc) {
1271 // The "std::bad_alloc" class has not yet been declared, so build it
1272 // implicitly.
Abramo Bagnara465d41b2010-05-11 21:36:43 +00001273 StdBadAlloc = CXXRecordDecl::Create(Context, TTK_Class,
Argyrios Kyrtzidis26faaac2010-08-02 07:14:39 +00001274 getOrCreateStdNamespace(),
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001275 SourceLocation(),
1276 &PP.getIdentifierTable().get("bad_alloc"),
1277 SourceLocation(), 0);
Argyrios Kyrtzidis76c38d32010-08-02 07:14:54 +00001278 getStdBadAlloc()->setImplicit(true);
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001279 }
1280
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001281 GlobalNewDeleteDeclared = true;
1282
1283 QualType VoidPtr = Context.getPointerType(Context.VoidTy);
1284 QualType SizeT = Context.getSizeType();
Nuno Lopesfc284482009-12-16 16:59:22 +00001285 bool AssumeSaneOperatorNew = getLangOptions().AssumeSaneOperatorNew;
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001286
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001287 DeclareGlobalAllocationFunction(
1288 Context.DeclarationNames.getCXXOperatorName(OO_New),
Nuno Lopesfc284482009-12-16 16:59:22 +00001289 VoidPtr, SizeT, AssumeSaneOperatorNew);
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001290 DeclareGlobalAllocationFunction(
1291 Context.DeclarationNames.getCXXOperatorName(OO_Array_New),
Nuno Lopesfc284482009-12-16 16:59:22 +00001292 VoidPtr, SizeT, AssumeSaneOperatorNew);
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001293 DeclareGlobalAllocationFunction(
1294 Context.DeclarationNames.getCXXOperatorName(OO_Delete),
1295 Context.VoidTy, VoidPtr);
1296 DeclareGlobalAllocationFunction(
1297 Context.DeclarationNames.getCXXOperatorName(OO_Array_Delete),
1298 Context.VoidTy, VoidPtr);
1299}
1300
1301/// DeclareGlobalAllocationFunction - Declares a single implicit global
1302/// allocation function if it doesn't already exist.
1303void Sema::DeclareGlobalAllocationFunction(DeclarationName Name,
Nuno Lopesfc284482009-12-16 16:59:22 +00001304 QualType Return, QualType Argument,
1305 bool AddMallocAttr) {
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001306 DeclContext *GlobalCtx = Context.getTranslationUnitDecl();
1307
1308 // Check if this function is already declared.
Douglas Gregor6ed40e32008-12-23 21:05:05 +00001309 {
Douglas Gregor5cc37092008-12-23 22:05:29 +00001310 DeclContext::lookup_iterator Alloc, AllocEnd;
Argyrios Kyrtzidis17945a02009-06-30 02:36:12 +00001311 for (llvm::tie(Alloc, AllocEnd) = GlobalCtx->lookup(Name);
Douglas Gregor6ed40e32008-12-23 21:05:05 +00001312 Alloc != AllocEnd; ++Alloc) {
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001313 // Only look at non-template functions, as it is the predefined,
1314 // non-templated allocation function we are trying to declare here.
1315 if (FunctionDecl *Func = dyn_cast<FunctionDecl>(*Alloc)) {
1316 QualType InitialParamType =
Douglas Gregor6e790ab2009-12-22 23:42:49 +00001317 Context.getCanonicalType(
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001318 Func->getParamDecl(0)->getType().getUnqualifiedType());
1319 // FIXME: Do we need to check for default arguments here?
Douglas Gregor7b868622010-08-18 15:06:25 +00001320 if (Func->getNumParams() == 1 && InitialParamType == Argument) {
1321 if(AddMallocAttr && !Func->hasAttr<MallocAttr>())
Sean Huntcf807c42010-08-18 23:23:40 +00001322 Func->addAttr(::new (Context) MallocAttr(SourceLocation(), Context));
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001323 return;
Douglas Gregor7b868622010-08-18 15:06:25 +00001324 }
Chandler Carruth4a73ea92010-02-03 11:02:14 +00001325 }
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001326 }
1327 }
1328
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001329 QualType BadAllocType;
1330 bool HasBadAllocExceptionSpec
1331 = (Name.getCXXOverloadedOperator() == OO_New ||
1332 Name.getCXXOverloadedOperator() == OO_Array_New);
1333 if (HasBadAllocExceptionSpec) {
1334 assert(StdBadAlloc && "Must have std::bad_alloc declared");
Argyrios Kyrtzidis76c38d32010-08-02 07:14:54 +00001335 BadAllocType = Context.getTypeDeclType(getStdBadAlloc());
Douglas Gregor7adb10f2009-09-15 22:30:29 +00001336 }
1337
1338 QualType FnType = Context.getFunctionType(Return, &Argument, 1, false, 0,
1339 true, false,
1340 HasBadAllocExceptionSpec? 1 : 0,
Rafael Espindola264ba482010-03-30 20:24:48 +00001341 &BadAllocType,
1342 FunctionType::ExtInfo());
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001343 FunctionDecl *Alloc =
1344 FunctionDecl::Create(Context, GlobalCtx, SourceLocation(), Name,
John McCalld931b082010-08-26 03:08:43 +00001345 FnType, /*TInfo=*/0, SC_None,
1346 SC_None, false, true);
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001347 Alloc->setImplicit();
Nuno Lopesfc284482009-12-16 16:59:22 +00001348
1349 if (AddMallocAttr)
Sean Huntcf807c42010-08-18 23:23:40 +00001350 Alloc->addAttr(::new (Context) MallocAttr(SourceLocation(), Context));
Nuno Lopesfc284482009-12-16 16:59:22 +00001351
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001352 ParmVarDecl *Param = ParmVarDecl::Create(Context, Alloc, SourceLocation(),
John McCalla93c9342009-12-07 02:54:59 +00001353 0, Argument, /*TInfo=*/0,
John McCalld931b082010-08-26 03:08:43 +00001354 SC_None,
1355 SC_None, 0);
Douglas Gregor838db382010-02-11 01:19:42 +00001356 Alloc->setParams(&Param, 1);
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001357
Douglas Gregor6ed40e32008-12-23 21:05:05 +00001358 // FIXME: Also add this declaration to the IdentifierResolver, but
1359 // make sure it is at the end of the chain to coincide with the
1360 // global scope.
John McCall5f1e0942010-08-24 08:50:51 +00001361 Context.getTranslationUnitDecl()->addDecl(Alloc);
Sebastian Redlb5a57a62008-12-03 20:26:15 +00001362}
1363
Anders Carlsson78f74552009-11-15 18:45:20 +00001364bool Sema::FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
1365 DeclarationName Name,
Anders Carlsson5ec02ae2009-12-02 17:15:43 +00001366 FunctionDecl* &Operator) {
John McCalla24dc2e2009-11-17 02:14:36 +00001367 LookupResult Found(*this, Name, StartLoc, LookupOrdinaryName);
Anders Carlsson78f74552009-11-15 18:45:20 +00001368 // Try to find operator delete/operator delete[] in class scope.
John McCalla24dc2e2009-11-17 02:14:36 +00001369 LookupQualifiedName(Found, RD);
Anders Carlsson78f74552009-11-15 18:45:20 +00001370
John McCalla24dc2e2009-11-17 02:14:36 +00001371 if (Found.isAmbiguous())
Anders Carlsson78f74552009-11-15 18:45:20 +00001372 return true;
Anders Carlsson78f74552009-11-15 18:45:20 +00001373
Chandler Carruth23893242010-06-28 00:30:51 +00001374 Found.suppressDiagnostics();
1375
John McCall046a7462010-08-04 00:31:26 +00001376 llvm::SmallVector<DeclAccessPair,4> Matches;
Anders Carlsson78f74552009-11-15 18:45:20 +00001377 for (LookupResult::iterator F = Found.begin(), FEnd = Found.end();
1378 F != FEnd; ++F) {
Chandler Carruth09556fd2010-08-08 07:04:00 +00001379 NamedDecl *ND = (*F)->getUnderlyingDecl();
1380
1381 // Ignore template operator delete members from the check for a usual
1382 // deallocation function.
1383 if (isa<FunctionTemplateDecl>(ND))
1384 continue;
1385
1386 if (cast<CXXMethodDecl>(ND)->isUsualDeallocationFunction())
John McCall046a7462010-08-04 00:31:26 +00001387 Matches.push_back(F.getPair());
1388 }
1389
1390 // There's exactly one suitable operator; pick it.
1391 if (Matches.size() == 1) {
1392 Operator = cast<CXXMethodDecl>(Matches[0]->getUnderlyingDecl());
1393 CheckAllocationAccess(StartLoc, SourceRange(), Found.getNamingClass(),
1394 Matches[0]);
1395 return false;
1396
1397 // We found multiple suitable operators; complain about the ambiguity.
1398 } else if (!Matches.empty()) {
1399 Diag(StartLoc, diag::err_ambiguous_suitable_delete_member_function_found)
1400 << Name << RD;
1401
1402 for (llvm::SmallVectorImpl<DeclAccessPair>::iterator
1403 F = Matches.begin(), FEnd = Matches.end(); F != FEnd; ++F)
1404 Diag((*F)->getUnderlyingDecl()->getLocation(),
1405 diag::note_member_declared_here) << Name;
1406 return true;
Anders Carlsson78f74552009-11-15 18:45:20 +00001407 }
1408
1409 // We did find operator delete/operator delete[] declarations, but
1410 // none of them were suitable.
1411 if (!Found.empty()) {
1412 Diag(StartLoc, diag::err_no_suitable_delete_member_function_found)
1413 << Name << RD;
1414
1415 for (LookupResult::iterator F = Found.begin(), FEnd = Found.end();
John McCall046a7462010-08-04 00:31:26 +00001416 F != FEnd; ++F)
1417 Diag((*F)->getUnderlyingDecl()->getLocation(),
1418 diag::note_member_declared_here) << Name;
Anders Carlsson78f74552009-11-15 18:45:20 +00001419
1420 return true;
1421 }
1422
1423 // Look for a global declaration.
1424 DeclareGlobalNewDelete();
1425 DeclContext *TUDecl = Context.getTranslationUnitDecl();
1426
1427 CXXNullPtrLiteralExpr Null(Context.VoidPtrTy, SourceLocation());
1428 Expr* DeallocArgs[1];
1429 DeallocArgs[0] = &Null;
1430 if (FindAllocationOverload(StartLoc, SourceRange(), Name,
1431 DeallocArgs, 1, TUDecl, /*AllowMissing=*/false,
1432 Operator))
1433 return true;
1434
1435 assert(Operator && "Did not find a deallocation function!");
1436 return false;
1437}
1438
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001439/// ActOnCXXDelete - Parsed a C++ 'delete' expression (C++ 5.3.5), as in:
1440/// @code ::delete ptr; @endcode
1441/// or
1442/// @code delete [] ptr; @endcode
John McCall60d7b3a2010-08-24 06:29:42 +00001443ExprResult
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001444Sema::ActOnCXXDelete(SourceLocation StartLoc, bool UseGlobal,
John McCall9ae2f072010-08-23 23:25:46 +00001445 bool ArrayForm, Expr *Ex) {
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001446 // C++ [expr.delete]p1:
1447 // The operand shall have a pointer type, or a class type having a single
1448 // conversion function to a pointer type. The result has type void.
1449 //
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001450 // DR599 amends "pointer type" to "pointer to object type" in both cases.
1451
Anders Carlssond67c4c32009-08-16 20:29:29 +00001452 FunctionDecl *OperatorDelete = 0;
Argyrios Kyrtzidis4076dac2010-09-13 20:15:54 +00001453 bool ArrayFormAsWritten = ArrayForm;
Mike Stump1eb44332009-09-09 15:08:12 +00001454
Sebastian Redl28507842009-02-26 14:39:58 +00001455 if (!Ex->isTypeDependent()) {
1456 QualType Type = Ex->getType();
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001457
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001458 if (const RecordType *Record = Type->getAs<RecordType>()) {
Douglas Gregor254a9422010-07-29 14:44:35 +00001459 if (RequireCompleteType(StartLoc, Type,
1460 PDiag(diag::err_delete_incomplete_class_type)))
1461 return ExprError();
1462
John McCall32daa422010-03-31 01:36:47 +00001463 llvm::SmallVector<CXXConversionDecl*, 4> ObjectPtrConversions;
1464
Fariborz Jahanian53462782009-09-11 21:44:33 +00001465 CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl());
John McCall32daa422010-03-31 01:36:47 +00001466 const UnresolvedSetImpl *Conversions = RD->getVisibleConversionFunctions();
John McCalleec51cf2010-01-20 00:46:10 +00001467 for (UnresolvedSetImpl::iterator I = Conversions->begin(),
John McCallba135432009-11-21 08:51:07 +00001468 E = Conversions->end(); I != E; ++I) {
John McCall32daa422010-03-31 01:36:47 +00001469 NamedDecl *D = I.getDecl();
1470 if (isa<UsingShadowDecl>(D))
1471 D = cast<UsingShadowDecl>(D)->getTargetDecl();
1472
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001473 // Skip over templated conversion functions; they aren't considered.
John McCall32daa422010-03-31 01:36:47 +00001474 if (isa<FunctionTemplateDecl>(D))
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001475 continue;
1476
John McCall32daa422010-03-31 01:36:47 +00001477 CXXConversionDecl *Conv = cast<CXXConversionDecl>(D);
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001478
1479 QualType ConvType = Conv->getConversionType().getNonReferenceType();
1480 if (const PointerType *ConvPtrType = ConvType->getAs<PointerType>())
Eli Friedman13578692010-08-05 02:49:48 +00001481 if (ConvPtrType->getPointeeType()->isIncompleteOrObjectType())
Fariborz Jahanian8b915e72009-09-15 22:15:23 +00001482 ObjectPtrConversions.push_back(Conv);
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001483 }
Fariborz Jahanian8b915e72009-09-15 22:15:23 +00001484 if (ObjectPtrConversions.size() == 1) {
1485 // We have a single conversion to a pointer-to-object type. Perform
1486 // that conversion.
John McCall32daa422010-03-31 01:36:47 +00001487 // TODO: don't redo the conversion calculation.
John McCall32daa422010-03-31 01:36:47 +00001488 if (!PerformImplicitConversion(Ex,
1489 ObjectPtrConversions.front()->getConversionType(),
Douglas Gregor68647482009-12-16 03:45:30 +00001490 AA_Converting)) {
Fariborz Jahanian8b915e72009-09-15 22:15:23 +00001491 Type = Ex->getType();
1492 }
1493 }
1494 else if (ObjectPtrConversions.size() > 1) {
1495 Diag(StartLoc, diag::err_ambiguous_delete_operand)
1496 << Type << Ex->getSourceRange();
John McCall32daa422010-03-31 01:36:47 +00001497 for (unsigned i= 0; i < ObjectPtrConversions.size(); i++)
1498 NoteOverloadCandidate(ObjectPtrConversions[i]);
Fariborz Jahanian8b915e72009-09-15 22:15:23 +00001499 return ExprError();
Douglas Gregor9cd9f3f2009-09-09 23:39:55 +00001500 }
Sebastian Redl28507842009-02-26 14:39:58 +00001501 }
1502
Sebastian Redlf53597f2009-03-15 17:47:39 +00001503 if (!Type->isPointerType())
1504 return ExprError(Diag(StartLoc, diag::err_delete_operand)
1505 << Type << Ex->getSourceRange());
Sebastian Redl28507842009-02-26 14:39:58 +00001506
Ted Kremenek6217b802009-07-29 21:53:49 +00001507 QualType Pointee = Type->getAs<PointerType>()->getPointeeType();
Douglas Gregor94a61572010-05-24 17:01:56 +00001508 if (Pointee->isVoidType() && !isSFINAEContext()) {
1509 // The C++ standard bans deleting a pointer to a non-object type, which
1510 // effectively bans deletion of "void*". However, most compilers support
1511 // this, so we treat it as a warning unless we're in a SFINAE context.
1512 Diag(StartLoc, diag::ext_delete_void_ptr_operand)
1513 << Type << Ex->getSourceRange();
1514 } else if (Pointee->isFunctionType() || Pointee->isVoidType())
Sebastian Redlf53597f2009-03-15 17:47:39 +00001515 return ExprError(Diag(StartLoc, diag::err_delete_operand)
1516 << Type << Ex->getSourceRange());
Douglas Gregor8dcb29d2009-03-24 20:13:58 +00001517 else if (!Pointee->isDependentType() &&
Mike Stump1eb44332009-09-09 15:08:12 +00001518 RequireCompleteType(StartLoc, Pointee,
Anders Carlssonb7906612009-08-26 23:45:07 +00001519 PDiag(diag::warn_delete_incomplete)
1520 << Ex->getSourceRange()))
Douglas Gregor8dcb29d2009-03-24 20:13:58 +00001521 return ExprError();
Sebastian Redl28507842009-02-26 14:39:58 +00001522
Douglas Gregor1070c9f2009-09-29 21:38:53 +00001523 // C++ [expr.delete]p2:
1524 // [Note: a pointer to a const type can be the operand of a
1525 // delete-expression; it is not necessary to cast away the constness
1526 // (5.2.11) of the pointer expression before it is used as the operand
1527 // of the delete-expression. ]
1528 ImpCastExprToType(Ex, Context.getPointerType(Context.VoidTy),
John McCall2de56d12010-08-25 11:45:40 +00001529 CK_NoOp);
Argyrios Kyrtzidis4076dac2010-09-13 20:15:54 +00001530
1531 if (Pointee->isArrayType() && !ArrayForm) {
1532 Diag(StartLoc, diag::warn_delete_array_type)
1533 << Type << Ex->getSourceRange()
1534 << FixItHint::CreateInsertion(PP.getLocForEndOfToken(StartLoc), "[]");
1535 ArrayForm = true;
1536 }
1537
Anders Carlssond67c4c32009-08-16 20:29:29 +00001538 DeclarationName DeleteName = Context.DeclarationNames.getCXXOperatorName(
1539 ArrayForm ? OO_Array_Delete : OO_Delete);
1540
Argyrios Kyrtzidisd2932982010-08-25 23:14:56 +00001541 QualType PointeeElem = Context.getBaseElementType(Pointee);
1542 if (const RecordType *RT = PointeeElem->getAs<RecordType>()) {
Anders Carlsson78f74552009-11-15 18:45:20 +00001543 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
1544
1545 if (!UseGlobal &&
1546 FindDeallocationFunction(StartLoc, RD, DeleteName, OperatorDelete))
Anders Carlsson0ba63ea2009-11-14 03:17:38 +00001547 return ExprError();
Anders Carlsson0ba63ea2009-11-14 03:17:38 +00001548
Anders Carlsson78f74552009-11-15 18:45:20 +00001549 if (!RD->hasTrivialDestructor())
Douglas Gregordb89f282010-07-01 22:47:18 +00001550 if (const CXXDestructorDecl *Dtor = LookupDestructor(RD))
Mike Stump1eb44332009-09-09 15:08:12 +00001551 MarkDeclarationReferenced(StartLoc,
Fariborz Jahanian34374e62009-09-03 23:18:17 +00001552 const_cast<CXXDestructorDecl*>(Dtor));
Anders Carlssond67c4c32009-08-16 20:29:29 +00001553 }
Anders Carlsson78f74552009-11-15 18:45:20 +00001554
Anders Carlssond67c4c32009-08-16 20:29:29 +00001555 if (!OperatorDelete) {
Anders Carlsson78f74552009-11-15 18:45:20 +00001556 // Look for a global declaration.
Anders Carlssond67c4c32009-08-16 20:29:29 +00001557 DeclareGlobalNewDelete();
1558 DeclContext *TUDecl = Context.getTranslationUnitDecl();
Mike Stump1eb44332009-09-09 15:08:12 +00001559 if (FindAllocationOverload(StartLoc, SourceRange(), DeleteName,
Douglas Gregor90916562009-09-29 18:16:17 +00001560 &Ex, 1, TUDecl, /*AllowMissing=*/false,
Anders Carlssond67c4c32009-08-16 20:29:29 +00001561 OperatorDelete))
1562 return ExprError();
1563 }
Mike Stump1eb44332009-09-09 15:08:12 +00001564
John McCall9c82afc2010-04-20 02:18:25 +00001565 MarkDeclarationReferenced(StartLoc, OperatorDelete);
1566
Sebastian Redl28507842009-02-26 14:39:58 +00001567 // FIXME: Check access and ambiguity of operator delete and destructor.
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001568 }
1569
Sebastian Redlf53597f2009-03-15 17:47:39 +00001570 return Owned(new (Context) CXXDeleteExpr(Context.VoidTy, UseGlobal, ArrayForm,
Argyrios Kyrtzidis4076dac2010-09-13 20:15:54 +00001571 ArrayFormAsWritten, OperatorDelete,
1572 Ex, StartLoc));
Sebastian Redl4c5d3202008-11-21 19:14:01 +00001573}
1574
Douglas Gregor8cfe5a72009-11-23 23:44:04 +00001575/// \brief Check the use of the given variable as a C++ condition in an if,
1576/// while, do-while, or switch statement.
John McCall60d7b3a2010-08-24 06:29:42 +00001577ExprResult Sema::CheckConditionVariable(VarDecl *ConditionVar,
Douglas Gregor586596f2010-05-06 17:25:47 +00001578 SourceLocation StmtLoc,
1579 bool ConvertToBoolean) {
Douglas Gregor8cfe5a72009-11-23 23:44:04 +00001580 QualType T = ConditionVar->getType();
1581
1582 // C++ [stmt.select]p2:
1583 // The declarator shall not specify a function or an array.
1584 if (T->isFunctionType())
1585 return ExprError(Diag(ConditionVar->getLocation(),
1586 diag::err_invalid_use_of_function_type)
1587 << ConditionVar->getSourceRange());
1588 else if (T->isArrayType())
1589 return ExprError(Diag(ConditionVar->getLocation(),
1590 diag::err_invalid_use_of_array_type)
1591 << ConditionVar->getSourceRange());
Douglas Gregora7605db2009-11-24 16:07:02 +00001592
Douglas Gregor586596f2010-05-06 17:25:47 +00001593 Expr *Condition = DeclRefExpr::Create(Context, 0, SourceRange(), ConditionVar,
1594 ConditionVar->getLocation(),
1595 ConditionVar->getType().getNonReferenceType());
Douglas Gregorff331c12010-07-25 18:17:45 +00001596 if (ConvertToBoolean && CheckBooleanCondition(Condition, StmtLoc))
Douglas Gregor586596f2010-05-06 17:25:47 +00001597 return ExprError();
Douglas Gregor586596f2010-05-06 17:25:47 +00001598
1599 return Owned(Condition);
Douglas Gregor8cfe5a72009-11-23 23:44:04 +00001600}
1601
Argyrios Kyrtzidis59210932008-09-10 02:17:11 +00001602/// CheckCXXBooleanCondition - Returns true if a conversion to bool is invalid.
1603bool Sema::CheckCXXBooleanCondition(Expr *&CondExpr) {
1604 // C++ 6.4p4:
1605 // The value of a condition that is an initialized declaration in a statement
1606 // other than a switch statement is the value of the declared variable
1607 // implicitly converted to type bool. If that conversion is ill-formed, the
1608 // program is ill-formed.
1609 // The value of a condition that is an expression is the value of the
1610 // expression, implicitly converted to bool.
1611 //
Douglas Gregor09f41cf2009-01-14 15:45:31 +00001612 return PerformContextuallyConvertToBool(CondExpr);
Argyrios Kyrtzidis59210932008-09-10 02:17:11 +00001613}
Douglas Gregor77a52232008-09-12 00:47:35 +00001614
1615/// Helper function to determine whether this is the (deprecated) C++
1616/// conversion from a string literal to a pointer to non-const char or
1617/// non-const wchar_t (for narrow and wide string literals,
1618/// respectively).
Mike Stump1eb44332009-09-09 15:08:12 +00001619bool
Douglas Gregor77a52232008-09-12 00:47:35 +00001620Sema::IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType) {
1621 // Look inside the implicit cast, if it exists.
1622 if (ImplicitCastExpr *Cast = dyn_cast<ImplicitCastExpr>(From))
1623 From = Cast->getSubExpr();
1624
1625 // A string literal (2.13.4) that is not a wide string literal can
1626 // be converted to an rvalue of type "pointer to char"; a wide
1627 // string literal can be converted to an rvalue of type "pointer
1628 // to wchar_t" (C++ 4.2p2).
Douglas Gregor1984eb92010-06-22 23:47:37 +00001629 if (StringLiteral *StrLit = dyn_cast<StringLiteral>(From->IgnoreParens()))
Ted Kremenek6217b802009-07-29 21:53:49 +00001630 if (const PointerType *ToPtrType = ToType->getAs<PointerType>())
Mike Stump1eb44332009-09-09 15:08:12 +00001631 if (const BuiltinType *ToPointeeType
John McCall183700f2009-09-21 23:43:11 +00001632 = ToPtrType->getPointeeType()->getAs<BuiltinType>()) {
Douglas Gregor77a52232008-09-12 00:47:35 +00001633 // This conversion is considered only when there is an
1634 // explicit appropriate pointer target type (C++ 4.2p2).
John McCall0953e762009-09-24 19:53:00 +00001635 if (!ToPtrType->getPointeeType().hasQualifiers() &&
Douglas Gregor77a52232008-09-12 00:47:35 +00001636 ((StrLit->isWide() && ToPointeeType->isWideCharType()) ||
1637 (!StrLit->isWide() &&
1638 (ToPointeeType->getKind() == BuiltinType::Char_U ||
1639 ToPointeeType->getKind() == BuiltinType::Char_S))))
1640 return true;
1641 }
1642
1643 return false;
1644}
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001645
John McCall60d7b3a2010-08-24 06:29:42 +00001646static ExprResult BuildCXXCastArgument(Sema &S,
John McCall2de56d12010-08-25 11:45:40 +00001647 SourceLocation CastLoc,
1648 QualType Ty,
1649 CastKind Kind,
1650 CXXMethodDecl *Method,
1651 Expr *From) {
Douglas Gregorba70ab62010-04-16 22:17:36 +00001652 switch (Kind) {
1653 default: assert(0 && "Unhandled cast kind!");
John McCall2de56d12010-08-25 11:45:40 +00001654 case CK_ConstructorConversion: {
John McCallca0408f2010-08-23 06:44:23 +00001655 ASTOwningVector<Expr*> ConstructorArgs(S);
Douglas Gregorba70ab62010-04-16 22:17:36 +00001656
1657 if (S.CompleteConstructorCall(cast<CXXConstructorDecl>(Method),
John McCallf312b1e2010-08-26 23:41:50 +00001658 MultiExprArg(&From, 1),
Douglas Gregorba70ab62010-04-16 22:17:36 +00001659 CastLoc, ConstructorArgs))
John McCallf312b1e2010-08-26 23:41:50 +00001660 return ExprError();
Douglas Gregorba70ab62010-04-16 22:17:36 +00001661
John McCall60d7b3a2010-08-24 06:29:42 +00001662 ExprResult Result =
Douglas Gregorba70ab62010-04-16 22:17:36 +00001663 S.BuildCXXConstructExpr(CastLoc, Ty, cast<CXXConstructorDecl>(Method),
John McCall7a1fad32010-08-24 07:32:53 +00001664 move_arg(ConstructorArgs),
1665 /*ZeroInit*/ false, CXXConstructExpr::CK_Complete);
Douglas Gregorba70ab62010-04-16 22:17:36 +00001666 if (Result.isInvalid())
John McCallf312b1e2010-08-26 23:41:50 +00001667 return ExprError();
Douglas Gregorba70ab62010-04-16 22:17:36 +00001668
1669 return S.MaybeBindToTemporary(Result.takeAs<Expr>());
1670 }
1671
John McCall2de56d12010-08-25 11:45:40 +00001672 case CK_UserDefinedConversion: {
Douglas Gregorba70ab62010-04-16 22:17:36 +00001673 assert(!From->getType()->isPointerType() && "Arg can't have pointer type!");
1674
1675 // Create an implicit call expr that calls it.
1676 // FIXME: pass the FoundDecl for the user-defined conversion here
1677 CXXMemberCallExpr *CE = S.BuildCXXMemberCallExpr(From, Method, Method);
1678 return S.MaybeBindToTemporary(CE);
1679 }
1680 }
1681}
1682
Douglas Gregor09f41cf2009-01-14 15:45:31 +00001683/// PerformImplicitConversion - Perform an implicit conversion of the
1684/// expression From to the type ToType using the pre-computed implicit
1685/// conversion sequence ICS. Returns true if there was an error, false
1686/// otherwise. The expression From is replaced with the converted
Douglas Gregor68647482009-12-16 03:45:30 +00001687/// expression. Action is the kind of conversion we're performing,
Douglas Gregor09f41cf2009-01-14 15:45:31 +00001688/// used in the error message.
1689bool
1690Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
1691 const ImplicitConversionSequence &ICS,
Douglas Gregor68647482009-12-16 03:45:30 +00001692 AssignmentAction Action, bool IgnoreBaseAccess) {
John McCall1d318332010-01-12 00:44:57 +00001693 switch (ICS.getKind()) {
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001694 case ImplicitConversionSequence::StandardConversion:
Douglas Gregor68647482009-12-16 03:45:30 +00001695 if (PerformImplicitConversion(From, ToType, ICS.Standard, Action,
Sebastian Redla82e4ae2009-11-14 21:15:49 +00001696 IgnoreBaseAccess))
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001697 return true;
1698 break;
1699
Anders Carlssonf6c213a2009-09-15 06:28:28 +00001700 case ImplicitConversionSequence::UserDefinedConversion: {
1701
Fariborz Jahanian7fe5d722009-08-28 22:04:50 +00001702 FunctionDecl *FD = ICS.UserDefined.ConversionFunction;
John McCall2de56d12010-08-25 11:45:40 +00001703 CastKind CastKind = CK_Unknown;
Anders Carlssonf6c213a2009-09-15 06:28:28 +00001704 QualType BeforeToType;
1705 if (const CXXConversionDecl *Conv = dyn_cast<CXXConversionDecl>(FD)) {
John McCall2de56d12010-08-25 11:45:40 +00001706 CastKind = CK_UserDefinedConversion;
Anders Carlssonf6c213a2009-09-15 06:28:28 +00001707
1708 // If the user-defined conversion is specified by a conversion function,
1709 // the initial standard conversion sequence converts the source type to
1710 // the implicit object parameter of the conversion function.
1711 BeforeToType = Context.getTagDeclType(Conv->getParent());
1712 } else if (const CXXConstructorDecl *Ctor =
1713 dyn_cast<CXXConstructorDecl>(FD)) {
John McCall2de56d12010-08-25 11:45:40 +00001714 CastKind = CK_ConstructorConversion;
Fariborz Jahanian966256a2009-11-06 00:23:08 +00001715 // Do no conversion if dealing with ... for the first conversion.
Douglas Gregore44201a2009-11-20 02:31:03 +00001716 if (!ICS.UserDefined.EllipsisConversion) {
Fariborz Jahanian966256a2009-11-06 00:23:08 +00001717 // If the user-defined conversion is specified by a constructor, the
1718 // initial standard conversion sequence converts the source type to the
1719 // type required by the argument of the constructor
Douglas Gregore44201a2009-11-20 02:31:03 +00001720 BeforeToType = Ctor->getParamDecl(0)->getType().getNonReferenceType();
1721 }
Anders Carlssonf6c213a2009-09-15 06:28:28 +00001722 }
Anders Carlsson0aebc812009-09-09 21:33:21 +00001723 else
1724 assert(0 && "Unknown conversion function kind!");
Fariborz Jahanian966256a2009-11-06 00:23:08 +00001725 // Whatch out for elipsis conversion.
Fariborz Jahanian4c0cea22009-11-06 00:55:14 +00001726 if (!ICS.UserDefined.EllipsisConversion) {
Fariborz Jahanian966256a2009-11-06 00:23:08 +00001727 if (PerformImplicitConversion(From, BeforeToType,
Douglas Gregor68647482009-12-16 03:45:30 +00001728 ICS.UserDefined.Before, AA_Converting,
Sebastian Redla82e4ae2009-11-14 21:15:49 +00001729 IgnoreBaseAccess))
Fariborz Jahanian966256a2009-11-06 00:23:08 +00001730 return true;
1731 }
Anders Carlssonf6c213a2009-09-15 06:28:28 +00001732
John McCall60d7b3a2010-08-24 06:29:42 +00001733 ExprResult CastArg
Douglas Gregorba70ab62010-04-16 22:17:36 +00001734 = BuildCXXCastArgument(*this,
1735 From->getLocStart(),
Anders Carlsson0aebc812009-09-09 21:33:21 +00001736 ToType.getNonReferenceType(),
1737 CastKind, cast<CXXMethodDecl>(FD),
John McCall9ae2f072010-08-23 23:25:46 +00001738 From);
Anders Carlsson0aebc812009-09-09 21:33:21 +00001739
1740 if (CastArg.isInvalid())
1741 return true;
Eli Friedmand8889622009-11-27 04:41:50 +00001742
1743 From = CastArg.takeAs<Expr>();
1744
Eli Friedmand8889622009-11-27 04:41:50 +00001745 return PerformImplicitConversion(From, ToType, ICS.UserDefined.After,
Douglas Gregor68647482009-12-16 03:45:30 +00001746 AA_Converting, IgnoreBaseAccess);
Fariborz Jahanian93034ca2009-10-16 19:20:59 +00001747 }
John McCall1d318332010-01-12 00:44:57 +00001748
1749 case ImplicitConversionSequence::AmbiguousConversion:
John McCall120d63c2010-08-24 20:38:10 +00001750 ICS.DiagnoseAmbiguousConversion(*this, From->getExprLoc(),
John McCall1d318332010-01-12 00:44:57 +00001751 PDiag(diag::err_typecheck_ambiguous_condition)
1752 << From->getSourceRange());
1753 return true;
Fariborz Jahanian93034ca2009-10-16 19:20:59 +00001754
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001755 case ImplicitConversionSequence::EllipsisConversion:
1756 assert(false && "Cannot perform an ellipsis conversion");
Douglas Gregor60d62c22008-10-31 16:23:19 +00001757 return false;
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001758
1759 case ImplicitConversionSequence::BadConversion:
1760 return true;
1761 }
1762
1763 // Everything went well.
1764 return false;
1765}
1766
1767/// PerformImplicitConversion - Perform an implicit conversion of the
1768/// expression From to the type ToType by following the standard
1769/// conversion sequence SCS. Returns true if there was an error, false
1770/// otherwise. The expression From is replaced with the converted
Douglas Gregor45920e82008-12-19 17:40:08 +00001771/// expression. Flavor is the context in which we're performing this
1772/// conversion, for use in error messages.
Mike Stump1eb44332009-09-09 15:08:12 +00001773bool
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001774Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
Douglas Gregor45920e82008-12-19 17:40:08 +00001775 const StandardConversionSequence& SCS,
Douglas Gregor68647482009-12-16 03:45:30 +00001776 AssignmentAction Action, bool IgnoreBaseAccess) {
Mike Stump390b4cc2009-05-16 07:39:55 +00001777 // Overall FIXME: we are recomputing too many types here and doing far too
1778 // much extra work. What this means is that we need to keep track of more
1779 // information that is computed when we try the implicit conversion initially,
1780 // so that we don't need to recompute anything here.
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001781 QualType FromType = From->getType();
1782
Douglas Gregor225c41e2008-11-03 19:09:14 +00001783 if (SCS.CopyConstructor) {
Anders Carlsson7c3e8a12009-05-19 04:45:15 +00001784 // FIXME: When can ToType be a reference type?
1785 assert(!ToType->isReferenceType());
Fariborz Jahanianb3c47742009-09-25 18:59:21 +00001786 if (SCS.Second == ICK_Derived_To_Base) {
John McCallca0408f2010-08-23 06:44:23 +00001787 ASTOwningVector<Expr*> ConstructorArgs(*this);
Fariborz Jahanianb3c47742009-09-25 18:59:21 +00001788 if (CompleteConstructorCall(cast<CXXConstructorDecl>(SCS.CopyConstructor),
John McCallca0408f2010-08-23 06:44:23 +00001789 MultiExprArg(*this, &From, 1),
Fariborz Jahanianb3c47742009-09-25 18:59:21 +00001790 /*FIXME:ConstructLoc*/SourceLocation(),
1791 ConstructorArgs))
1792 return true;
John McCall60d7b3a2010-08-24 06:29:42 +00001793 ExprResult FromResult =
Fariborz Jahanianb3c47742009-09-25 18:59:21 +00001794 BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
1795 ToType, SCS.CopyConstructor,
John McCall7a1fad32010-08-24 07:32:53 +00001796 move_arg(ConstructorArgs),
1797 /*ZeroInit*/ false,
1798 CXXConstructExpr::CK_Complete);
Fariborz Jahanianb3c47742009-09-25 18:59:21 +00001799 if (FromResult.isInvalid())
1800 return true;
1801 From = FromResult.takeAs<Expr>();
1802 return false;
1803 }
John McCall60d7b3a2010-08-24 06:29:42 +00001804 ExprResult FromResult =
Mike Stump1eb44332009-09-09 15:08:12 +00001805 BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
1806 ToType, SCS.CopyConstructor,
John McCall7a1fad32010-08-24 07:32:53 +00001807 MultiExprArg(*this, &From, 1),
1808 /*ZeroInit*/ false,
1809 CXXConstructExpr::CK_Complete);
Mike Stump1eb44332009-09-09 15:08:12 +00001810
Anders Carlssonda3f4e22009-08-25 05:12:04 +00001811 if (FromResult.isInvalid())
1812 return true;
Mike Stump1eb44332009-09-09 15:08:12 +00001813
Anders Carlssonda3f4e22009-08-25 05:12:04 +00001814 From = FromResult.takeAs<Expr>();
Douglas Gregor225c41e2008-11-03 19:09:14 +00001815 return false;
1816 }
1817
Douglas Gregorad4e02f2010-04-29 18:24:40 +00001818 // Resolve overloaded function references.
1819 if (Context.hasSameType(FromType, Context.OverloadTy)) {
1820 DeclAccessPair Found;
1821 FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(From, ToType,
1822 true, Found);
1823 if (!Fn)
1824 return true;
1825
1826 if (DiagnoseUseOfDecl(Fn, From->getSourceRange().getBegin()))
1827 return true;
1828
1829 From = FixOverloadedFunctionReference(From, Found, Fn);
1830 FromType = From->getType();
1831 }
1832
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001833 // Perform the first implicit conversion.
1834 switch (SCS.First) {
1835 case ICK_Identity:
1836 case ICK_Lvalue_To_Rvalue:
1837 // Nothing to do.
1838 break;
1839
1840 case ICK_Array_To_Pointer:
Douglas Gregor48f3bb92009-02-18 21:56:37 +00001841 FromType = Context.getArrayDecayedType(FromType);
John McCall2de56d12010-08-25 11:45:40 +00001842 ImpCastExprToType(From, FromType, CK_ArrayToPointerDecay);
Douglas Gregor48f3bb92009-02-18 21:56:37 +00001843 break;
1844
1845 case ICK_Function_To_Pointer:
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001846 FromType = Context.getPointerType(FromType);
John McCall2de56d12010-08-25 11:45:40 +00001847 ImpCastExprToType(From, FromType, CK_FunctionToPointerDecay);
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001848 break;
1849
1850 default:
1851 assert(false && "Improper first standard conversion");
1852 break;
1853 }
1854
1855 // Perform the second implicit conversion
1856 switch (SCS.Second) {
1857 case ICK_Identity:
Sebastian Redl2c7588f2009-10-10 12:04:10 +00001858 // If both sides are functions (or pointers/references to them), there could
1859 // be incompatible exception declarations.
1860 if (CheckExceptionSpecCompatibility(From, ToType))
1861 return true;
1862 // Nothing else to do.
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001863 break;
1864
Douglas Gregor43c79c22009-12-09 00:47:37 +00001865 case ICK_NoReturn_Adjustment:
1866 // If both sides are functions (or pointers/references to them), there could
1867 // be incompatible exception declarations.
1868 if (CheckExceptionSpecCompatibility(From, ToType))
1869 return true;
1870
1871 ImpCastExprToType(From, Context.getNoReturnType(From->getType(), false),
John McCall2de56d12010-08-25 11:45:40 +00001872 CK_NoOp);
Douglas Gregor43c79c22009-12-09 00:47:37 +00001873 break;
1874
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001875 case ICK_Integral_Promotion:
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001876 case ICK_Integral_Conversion:
John McCall2de56d12010-08-25 11:45:40 +00001877 ImpCastExprToType(From, ToType, CK_IntegralCast);
Eli Friedman73c39ab2009-10-20 08:27:19 +00001878 break;
1879
1880 case ICK_Floating_Promotion:
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001881 case ICK_Floating_Conversion:
John McCall2de56d12010-08-25 11:45:40 +00001882 ImpCastExprToType(From, ToType, CK_FloatingCast);
Eli Friedman73c39ab2009-10-20 08:27:19 +00001883 break;
1884
1885 case ICK_Complex_Promotion:
Douglas Gregor5cdf8212009-02-12 00:15:05 +00001886 case ICK_Complex_Conversion:
John McCall2de56d12010-08-25 11:45:40 +00001887 ImpCastExprToType(From, ToType, CK_Unknown);
Eli Friedman73c39ab2009-10-20 08:27:19 +00001888 break;
1889
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001890 case ICK_Floating_Integral:
Douglas Gregor0c293ea2010-06-22 23:07:26 +00001891 if (ToType->isRealFloatingType())
John McCall2de56d12010-08-25 11:45:40 +00001892 ImpCastExprToType(From, ToType, CK_IntegralToFloating);
Eli Friedman73c39ab2009-10-20 08:27:19 +00001893 else
John McCall2de56d12010-08-25 11:45:40 +00001894 ImpCastExprToType(From, ToType, CK_FloatingToIntegral);
Eli Friedman73c39ab2009-10-20 08:27:19 +00001895 break;
1896
Douglas Gregorf9201e02009-02-11 23:02:49 +00001897 case ICK_Compatible_Conversion:
John McCall2de56d12010-08-25 11:45:40 +00001898 ImpCastExprToType(From, ToType, CK_NoOp);
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001899 break;
1900
Anders Carlsson61faec12009-09-12 04:46:44 +00001901 case ICK_Pointer_Conversion: {
Douglas Gregor45920e82008-12-19 17:40:08 +00001902 if (SCS.IncompatibleObjC) {
1903 // Diagnose incompatible Objective-C conversions
Mike Stump1eb44332009-09-09 15:08:12 +00001904 Diag(From->getSourceRange().getBegin(),
Douglas Gregor45920e82008-12-19 17:40:08 +00001905 diag::ext_typecheck_convert_incompatible_pointer)
Douglas Gregor68647482009-12-16 03:45:30 +00001906 << From->getType() << ToType << Action
Douglas Gregor45920e82008-12-19 17:40:08 +00001907 << From->getSourceRange();
1908 }
1909
Anders Carlsson61faec12009-09-12 04:46:44 +00001910
John McCall2de56d12010-08-25 11:45:40 +00001911 CastKind Kind = CK_Unknown;
John McCallf871d0c2010-08-07 06:22:56 +00001912 CXXCastPath BasePath;
Anders Carlsson5cf86ba2010-04-24 19:06:50 +00001913 if (CheckPointerConversion(From, ToType, Kind, BasePath, IgnoreBaseAccess))
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001914 return true;
John McCall5baba9d2010-08-25 10:28:54 +00001915 ImpCastExprToType(From, ToType, Kind, VK_RValue, &BasePath);
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001916 break;
Anders Carlsson61faec12009-09-12 04:46:44 +00001917 }
1918
1919 case ICK_Pointer_Member: {
John McCall2de56d12010-08-25 11:45:40 +00001920 CastKind Kind = CK_Unknown;
John McCallf871d0c2010-08-07 06:22:56 +00001921 CXXCastPath BasePath;
Anders Carlssonf9d68e12010-04-24 19:36:51 +00001922 if (CheckMemberPointerConversion(From, ToType, Kind, BasePath,
1923 IgnoreBaseAccess))
Anders Carlsson61faec12009-09-12 04:46:44 +00001924 return true;
Sebastian Redl2c7588f2009-10-10 12:04:10 +00001925 if (CheckExceptionSpecCompatibility(From, ToType))
1926 return true;
John McCall5baba9d2010-08-25 10:28:54 +00001927 ImpCastExprToType(From, ToType, Kind, VK_RValue, &BasePath);
Anders Carlsson61faec12009-09-12 04:46:44 +00001928 break;
1929 }
Anders Carlssonbc0e0782009-11-23 20:04:44 +00001930 case ICK_Boolean_Conversion: {
John McCall2de56d12010-08-25 11:45:40 +00001931 CastKind Kind = CK_Unknown;
Anders Carlssonbc0e0782009-11-23 20:04:44 +00001932 if (FromType->isMemberPointerType())
John McCall2de56d12010-08-25 11:45:40 +00001933 Kind = CK_MemberPointerToBoolean;
Anders Carlssonbc0e0782009-11-23 20:04:44 +00001934
1935 ImpCastExprToType(From, Context.BoolTy, Kind);
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001936 break;
Anders Carlssonbc0e0782009-11-23 20:04:44 +00001937 }
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001938
Douglas Gregor6fb745b2010-05-13 16:44:06 +00001939 case ICK_Derived_To_Base: {
John McCallf871d0c2010-08-07 06:22:56 +00001940 CXXCastPath BasePath;
Douglas Gregorb7a86f52009-11-06 01:02:41 +00001941 if (CheckDerivedToBaseConversion(From->getType(),
1942 ToType.getNonReferenceType(),
1943 From->getLocStart(),
Douglas Gregor6fb745b2010-05-13 16:44:06 +00001944 From->getSourceRange(),
1945 &BasePath,
Sebastian Redla82e4ae2009-11-14 21:15:49 +00001946 IgnoreBaseAccess))
Douglas Gregorb7a86f52009-11-06 01:02:41 +00001947 return true;
Douglas Gregor6fb745b2010-05-13 16:44:06 +00001948
Sebastian Redl906082e2010-07-20 04:20:21 +00001949 ImpCastExprToType(From, ToType.getNonReferenceType(),
John McCall2de56d12010-08-25 11:45:40 +00001950 CK_DerivedToBase, CastCategory(From),
John McCallf871d0c2010-08-07 06:22:56 +00001951 &BasePath);
Douglas Gregorb7a86f52009-11-06 01:02:41 +00001952 break;
Douglas Gregor6fb745b2010-05-13 16:44:06 +00001953 }
1954
Douglas Gregorfb4a5432010-05-18 22:42:18 +00001955 case ICK_Vector_Conversion:
John McCall2de56d12010-08-25 11:45:40 +00001956 ImpCastExprToType(From, ToType, CK_BitCast);
Douglas Gregorfb4a5432010-05-18 22:42:18 +00001957 break;
1958
1959 case ICK_Vector_Splat:
John McCall2de56d12010-08-25 11:45:40 +00001960 ImpCastExprToType(From, ToType, CK_VectorSplat);
Douglas Gregorfb4a5432010-05-18 22:42:18 +00001961 break;
1962
1963 case ICK_Complex_Real:
John McCall2de56d12010-08-25 11:45:40 +00001964 ImpCastExprToType(From, ToType, CK_Unknown);
Douglas Gregorfb4a5432010-05-18 22:42:18 +00001965 break;
1966
1967 case ICK_Lvalue_To_Rvalue:
1968 case ICK_Array_To_Pointer:
1969 case ICK_Function_To_Pointer:
1970 case ICK_Qualification:
1971 case ICK_Num_Conversion_Kinds:
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001972 assert(false && "Improper second standard conversion");
1973 break;
1974 }
1975
1976 switch (SCS.Third) {
1977 case ICK_Identity:
1978 // Nothing to do.
1979 break;
1980
Sebastian Redl906082e2010-07-20 04:20:21 +00001981 case ICK_Qualification: {
1982 // The qualification keeps the category of the inner expression, unless the
1983 // target type isn't a reference.
John McCall5baba9d2010-08-25 10:28:54 +00001984 ExprValueKind VK = ToType->isReferenceType() ?
1985 CastCategory(From) : VK_RValue;
Douglas Gregor63982352010-07-13 18:40:04 +00001986 ImpCastExprToType(From, ToType.getNonLValueExprType(Context),
John McCall2de56d12010-08-25 11:45:40 +00001987 CK_NoOp, VK);
Douglas Gregora9bff302010-02-28 18:30:25 +00001988
1989 if (SCS.DeprecatedStringLiteralToCharPtr)
1990 Diag(From->getLocStart(), diag::warn_deprecated_string_literal_conversion)
1991 << ToType.getNonReferenceType();
1992
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001993 break;
Sebastian Redl906082e2010-07-20 04:20:21 +00001994 }
1995
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001996 default:
Douglas Gregorfb4a5432010-05-18 22:42:18 +00001997 assert(false && "Improper third standard conversion");
Douglas Gregor94b1dd22008-10-24 04:54:22 +00001998 break;
1999 }
2000
2001 return false;
2002}
2003
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002004ExprResult Sema::ActOnUnaryTypeTrait(UnaryTypeTrait UTT,
Douglas Gregor3d37c0a2010-09-09 16:14:44 +00002005 SourceLocation KWLoc,
2006 ParsedType Ty,
2007 SourceLocation RParen) {
2008 TypeSourceInfo *TSInfo;
2009 QualType T = GetTypeFromParser(Ty, &TSInfo);
Mike Stump1eb44332009-09-09 15:08:12 +00002010
Douglas Gregor3d37c0a2010-09-09 16:14:44 +00002011 if (!TSInfo)
2012 TSInfo = Context.getTrivialTypeSourceInfo(T);
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002013 return BuildUnaryTypeTrait(UTT, KWLoc, TSInfo, RParen);
Douglas Gregor3d37c0a2010-09-09 16:14:44 +00002014}
2015
Sebastian Redlf8aca862010-09-14 23:40:14 +00002016static bool EvaluateUnaryTypeTrait(Sema &Self, UnaryTypeTrait UTT, QualType T,
2017 SourceLocation KeyLoc) {
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002018 assert(!T->isDependentType() &&
2019 "Cannot evaluate traits for dependent types.");
2020 ASTContext &C = Self.Context;
2021 switch(UTT) {
2022 default: assert(false && "Unknown type trait or not implemented");
2023 case UTT_IsPOD: return T->isPODType();
2024 case UTT_IsLiteral: return T->isLiteralType();
2025 case UTT_IsClass: // Fallthrough
2026 case UTT_IsUnion:
2027 if (const RecordType *Record = T->getAs<RecordType>()) {
2028 bool Union = Record->getDecl()->isUnion();
2029 return UTT == UTT_IsUnion ? Union : !Union;
2030 }
2031 return false;
2032 case UTT_IsEnum: return T->isEnumeralType();
2033 case UTT_IsPolymorphic:
2034 if (const RecordType *Record = T->getAs<RecordType>()) {
2035 // Type traits are only parsed in C++, so we've got CXXRecords.
2036 return cast<CXXRecordDecl>(Record->getDecl())->isPolymorphic();
2037 }
2038 return false;
2039 case UTT_IsAbstract:
2040 if (const RecordType *RT = T->getAs<RecordType>())
2041 return cast<CXXRecordDecl>(RT->getDecl())->isAbstract();
2042 return false;
2043 case UTT_IsEmpty:
2044 if (const RecordType *Record = T->getAs<RecordType>()) {
2045 return !Record->getDecl()->isUnion()
2046 && cast<CXXRecordDecl>(Record->getDecl())->isEmpty();
2047 }
2048 return false;
2049 case UTT_HasTrivialConstructor:
2050 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2051 // If __is_pod (type) is true then the trait is true, else if type is
2052 // a cv class or union type (or array thereof) with a trivial default
2053 // constructor ([class.ctor]) then the trait is true, else it is false.
2054 if (T->isPODType())
2055 return true;
2056 if (const RecordType *RT =
2057 C.getBaseElementType(T)->getAs<RecordType>())
2058 return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialConstructor();
2059 return false;
2060 case UTT_HasTrivialCopy:
2061 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2062 // If __is_pod (type) is true or type is a reference type then
2063 // the trait is true, else if type is a cv class or union type
2064 // with a trivial copy constructor ([class.copy]) then the trait
2065 // is true, else it is false.
2066 if (T->isPODType() || T->isReferenceType())
2067 return true;
2068 if (const RecordType *RT = T->getAs<RecordType>())
2069 return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialCopyConstructor();
2070 return false;
2071 case UTT_HasTrivialAssign:
2072 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2073 // If type is const qualified or is a reference type then the
2074 // trait is false. Otherwise if __is_pod (type) is true then the
2075 // trait is true, else if type is a cv class or union type with
2076 // a trivial copy assignment ([class.copy]) then the trait is
2077 // true, else it is false.
2078 // Note: the const and reference restrictions are interesting,
2079 // given that const and reference members don't prevent a class
2080 // from having a trivial copy assignment operator (but do cause
2081 // errors if the copy assignment operator is actually used, q.v.
2082 // [class.copy]p12).
2083
2084 if (C.getBaseElementType(T).isConstQualified())
2085 return false;
2086 if (T->isPODType())
2087 return true;
2088 if (const RecordType *RT = T->getAs<RecordType>())
2089 return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialCopyAssignment();
2090 return false;
2091 case UTT_HasTrivialDestructor:
2092 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2093 // If __is_pod (type) is true or type is a reference type
2094 // then the trait is true, else if type is a cv class or union
2095 // type (or array thereof) with a trivial destructor
2096 // ([class.dtor]) then the trait is true, else it is
2097 // false.
2098 if (T->isPODType() || T->isReferenceType())
2099 return true;
2100 if (const RecordType *RT =
2101 C.getBaseElementType(T)->getAs<RecordType>())
2102 return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialDestructor();
2103 return false;
2104 // TODO: Propagate nothrowness for implicitly declared special members.
2105 case UTT_HasNothrowAssign:
2106 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2107 // If type is const qualified or is a reference type then the
2108 // trait is false. Otherwise if __has_trivial_assign (type)
2109 // is true then the trait is true, else if type is a cv class
2110 // or union type with copy assignment operators that are known
2111 // not to throw an exception then the trait is true, else it is
2112 // false.
2113 if (C.getBaseElementType(T).isConstQualified())
2114 return false;
2115 if (T->isReferenceType())
2116 return false;
2117 if (T->isPODType())
2118 return true;
2119 if (const RecordType *RT = T->getAs<RecordType>()) {
2120 CXXRecordDecl* RD = cast<CXXRecordDecl>(RT->getDecl());
2121 if (RD->hasTrivialCopyAssignment())
2122 return true;
2123
2124 bool FoundAssign = false;
2125 bool AllNoThrow = true;
2126 DeclarationName Name = C.DeclarationNames.getCXXOperatorName(OO_Equal);
Sebastian Redlf8aca862010-09-14 23:40:14 +00002127 LookupResult Res(Self, DeclarationNameInfo(Name, KeyLoc),
2128 Sema::LookupOrdinaryName);
2129 if (Self.LookupQualifiedName(Res, RD)) {
2130 for (LookupResult::iterator Op = Res.begin(), OpEnd = Res.end();
2131 Op != OpEnd; ++Op) {
2132 CXXMethodDecl *Operator = cast<CXXMethodDecl>(*Op);
2133 if (Operator->isCopyAssignmentOperator()) {
2134 FoundAssign = true;
2135 const FunctionProtoType *CPT
2136 = Operator->getType()->getAs<FunctionProtoType>();
2137 if (!CPT->hasEmptyExceptionSpec()) {
2138 AllNoThrow = false;
2139 break;
2140 }
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002141 }
2142 }
2143 }
2144
2145 return FoundAssign && AllNoThrow;
2146 }
2147 return false;
2148 case UTT_HasNothrowCopy:
2149 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2150 // If __has_trivial_copy (type) is true then the trait is true, else
2151 // if type is a cv class or union type with copy constructors that are
2152 // known not to throw an exception then the trait is true, else it is
2153 // false.
2154 if (T->isPODType() || T->isReferenceType())
2155 return true;
2156 if (const RecordType *RT = T->getAs<RecordType>()) {
2157 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
2158 if (RD->hasTrivialCopyConstructor())
2159 return true;
2160
2161 bool FoundConstructor = false;
2162 bool AllNoThrow = true;
2163 unsigned FoundTQs;
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002164 DeclContext::lookup_const_iterator Con, ConEnd;
Sebastian Redl5f4e8992010-09-13 21:10:20 +00002165 for (llvm::tie(Con, ConEnd) = Self.LookupConstructors(RD);
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002166 Con != ConEnd; ++Con) {
Sebastian Redl08295a52010-09-13 22:18:28 +00002167 // A template constructor is never a copy constructor.
2168 // FIXME: However, it may actually be selected at the actual overload
2169 // resolution point.
2170 if (isa<FunctionTemplateDecl>(*Con))
2171 continue;
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002172 CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(*Con);
2173 if (Constructor->isCopyConstructor(FoundTQs)) {
2174 FoundConstructor = true;
2175 const FunctionProtoType *CPT
2176 = Constructor->getType()->getAs<FunctionProtoType>();
Sebastian Redl751025d2010-09-13 22:02:47 +00002177 // TODO: check whether evaluating default arguments can throw.
2178 // For now, we'll be conservative and assume that they can throw.
2179 if (!CPT->hasEmptyExceptionSpec() || CPT->getNumArgs() > 1) {
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002180 AllNoThrow = false;
2181 break;
2182 }
2183 }
2184 }
2185
2186 return FoundConstructor && AllNoThrow;
2187 }
2188 return false;
2189 case UTT_HasNothrowConstructor:
2190 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2191 // If __has_trivial_constructor (type) is true then the trait is
2192 // true, else if type is a cv class or union type (or array
2193 // thereof) with a default constructor that is known not to
2194 // throw an exception then the trait is true, else it is false.
2195 if (T->isPODType())
2196 return true;
2197 if (const RecordType *RT = C.getBaseElementType(T)->getAs<RecordType>()) {
2198 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
2199 if (RD->hasTrivialConstructor())
2200 return true;
2201
Sebastian Redl751025d2010-09-13 22:02:47 +00002202 DeclContext::lookup_const_iterator Con, ConEnd;
2203 for (llvm::tie(Con, ConEnd) = Self.LookupConstructors(RD);
2204 Con != ConEnd; ++Con) {
Sebastian Redl08295a52010-09-13 22:18:28 +00002205 // FIXME: In C++0x, a constructor template can be a default constructor.
2206 if (isa<FunctionTemplateDecl>(*Con))
2207 continue;
Sebastian Redl751025d2010-09-13 22:02:47 +00002208 CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(*Con);
2209 if (Constructor->isDefaultConstructor()) {
2210 const FunctionProtoType *CPT
2211 = Constructor->getType()->getAs<FunctionProtoType>();
2212 // TODO: check whether evaluating default arguments can throw.
2213 // For now, we'll be conservative and assume that they can throw.
2214 return CPT->hasEmptyExceptionSpec() && CPT->getNumArgs() == 0;
2215 }
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002216 }
2217 }
2218 return false;
2219 case UTT_HasVirtualDestructor:
2220 // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html:
2221 // If type is a class type with a virtual destructor ([class.dtor])
2222 // then the trait is true, else it is false.
2223 if (const RecordType *Record = T->getAs<RecordType>()) {
2224 CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl());
Sebastian Redlf8aca862010-09-14 23:40:14 +00002225 if (CXXDestructorDecl *Destructor = Self.LookupDestructor(RD))
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002226 return Destructor->isVirtual();
2227 }
2228 return false;
2229 }
2230}
2231
2232ExprResult Sema::BuildUnaryTypeTrait(UnaryTypeTrait UTT,
Douglas Gregor3d37c0a2010-09-09 16:14:44 +00002233 SourceLocation KWLoc,
2234 TypeSourceInfo *TSInfo,
2235 SourceLocation RParen) {
2236 QualType T = TSInfo->getType();
2237
Anders Carlsson3292d5c2009-07-07 19:06:02 +00002238 // According to http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html
2239 // all traits except __is_class, __is_enum and __is_union require a the type
Sebastian Redl607a1782010-09-08 00:48:43 +00002240 // to be complete, an array of unknown bound, or void.
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002241 if (UTT != UTT_IsClass && UTT != UTT_IsEnum && UTT != UTT_IsUnion) {
Sebastian Redl607a1782010-09-08 00:48:43 +00002242 QualType E = T;
2243 if (T->isIncompleteArrayType())
2244 E = Context.getAsArrayType(T)->getElementType();
2245 if (!T->isVoidType() &&
2246 RequireCompleteType(KWLoc, E,
Anders Carlssond497ba72009-08-26 22:59:12 +00002247 diag::err_incomplete_type_used_in_type_trait_expr))
Anders Carlsson3292d5c2009-07-07 19:06:02 +00002248 return ExprError();
2249 }
Sebastian Redl64b45f72009-01-05 20:52:13 +00002250
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002251 bool Value = false;
2252 if (!T->isDependentType())
Sebastian Redlf8aca862010-09-14 23:40:14 +00002253 Value = EvaluateUnaryTypeTrait(*this, UTT, T, KWLoc);
Sebastian Redl0dfd8482010-09-13 20:56:31 +00002254
2255 return Owned(new (Context) UnaryTypeTraitExpr(KWLoc, UTT, TSInfo, Value,
Anders Carlsson3292d5c2009-07-07 19:06:02 +00002256 RParen, Context.BoolTy));
Sebastian Redl64b45f72009-01-05 20:52:13 +00002257}
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002258
2259QualType Sema::CheckPointerToMemberOperands(
Mike Stump1eb44332009-09-09 15:08:12 +00002260 Expr *&lex, Expr *&rex, SourceLocation Loc, bool isIndirect) {
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002261 const char *OpSpelling = isIndirect ? "->*" : ".*";
2262 // C++ 5.5p2
2263 // The binary operator .* [p3: ->*] binds its second operand, which shall
2264 // be of type "pointer to member of T" (where T is a completely-defined
2265 // class type) [...]
2266 QualType RType = rex->getType();
Ted Kremenek6217b802009-07-29 21:53:49 +00002267 const MemberPointerType *MemPtr = RType->getAs<MemberPointerType>();
Douglas Gregore7450f52009-03-24 19:52:54 +00002268 if (!MemPtr) {
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002269 Diag(Loc, diag::err_bad_memptr_rhs)
2270 << OpSpelling << RType << rex->getSourceRange();
2271 return QualType();
Mike Stump1eb44332009-09-09 15:08:12 +00002272 }
Douglas Gregore7450f52009-03-24 19:52:54 +00002273
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002274 QualType Class(MemPtr->getClass(), 0);
2275
Sebastian Redl59fc2692010-04-10 10:14:54 +00002276 if (RequireCompleteType(Loc, Class, diag::err_memptr_rhs_to_incomplete))
2277 return QualType();
2278
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002279 // C++ 5.5p2
2280 // [...] to its first operand, which shall be of class T or of a class of
2281 // which T is an unambiguous and accessible base class. [p3: a pointer to
2282 // such a class]
2283 QualType LType = lex->getType();
2284 if (isIndirect) {
Ted Kremenek6217b802009-07-29 21:53:49 +00002285 if (const PointerType *Ptr = LType->getAs<PointerType>())
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002286 LType = Ptr->getPointeeType().getNonReferenceType();
2287 else {
2288 Diag(Loc, diag::err_bad_memptr_lhs)
Fariborz Jahanianef78ac62009-10-26 20:45:27 +00002289 << OpSpelling << 1 << LType
Douglas Gregor849b2432010-03-31 17:46:05 +00002290 << FixItHint::CreateReplacement(SourceRange(Loc), ".*");
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002291 return QualType();
2292 }
2293 }
2294
Douglas Gregora4923eb2009-11-16 21:35:15 +00002295 if (!Context.hasSameUnqualifiedType(Class, LType)) {
Sebastian Redl17e1d352010-04-23 17:18:26 +00002296 // If we want to check the hierarchy, we need a complete type.
2297 if (RequireCompleteType(Loc, LType, PDiag(diag::err_bad_memptr_lhs)
2298 << OpSpelling << (int)isIndirect)) {
2299 return QualType();
2300 }
Anders Carlsson5cf86ba2010-04-24 19:06:50 +00002301 CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
Douglas Gregora8f32e02009-10-06 17:59:45 +00002302 /*DetectVirtual=*/false);
Mike Stump390b4cc2009-05-16 07:39:55 +00002303 // FIXME: Would it be useful to print full ambiguity paths, or is that
2304 // overkill?
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002305 if (!IsDerivedFrom(LType, Class, Paths) ||
2306 Paths.isAmbiguous(Context.getCanonicalType(Class))) {
2307 Diag(Loc, diag::err_bad_memptr_lhs) << OpSpelling
Eli Friedman3005efe2010-01-16 00:00:48 +00002308 << (int)isIndirect << lex->getType();
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002309 return QualType();
2310 }
Eli Friedman3005efe2010-01-16 00:00:48 +00002311 // Cast LHS to type of use.
2312 QualType UseType = isIndirect ? Context.getPointerType(Class) : Class;
John McCall5baba9d2010-08-25 10:28:54 +00002313 ExprValueKind VK =
2314 isIndirect ? VK_RValue : CastCategory(lex);
Sebastian Redl906082e2010-07-20 04:20:21 +00002315
John McCallf871d0c2010-08-07 06:22:56 +00002316 CXXCastPath BasePath;
Anders Carlsson5cf86ba2010-04-24 19:06:50 +00002317 BuildBasePathArray(Paths, BasePath);
John McCall5baba9d2010-08-25 10:28:54 +00002318 ImpCastExprToType(lex, UseType, CK_DerivedToBase, VK, &BasePath);
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002319 }
2320
Douglas Gregored8abf12010-07-08 06:14:04 +00002321 if (isa<CXXScalarValueInitExpr>(rex->IgnoreParens())) {
Fariborz Jahanian05ebda92009-11-18 21:54:48 +00002322 // Diagnose use of pointer-to-member type which when used as
2323 // the functional cast in a pointer-to-member expression.
2324 Diag(Loc, diag::err_pointer_to_member_type) << isIndirect;
2325 return QualType();
2326 }
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002327 // C++ 5.5p2
2328 // The result is an object or a function of the type specified by the
2329 // second operand.
2330 // The cv qualifiers are the union of those in the pointer and the left side,
2331 // in accordance with 5.5p5 and 5.2.5.
2332 // FIXME: This returns a dereferenced member function pointer as a normal
2333 // function type. However, the only operation valid on such functions is
Mike Stump390b4cc2009-05-16 07:39:55 +00002334 // calling them. There's also a GCC extension to get a function pointer to the
2335 // thing, which is another complication, because this type - unlike the type
2336 // that is the result of this expression - takes the class as the first
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002337 // argument.
2338 // We probably need a "MemberFunctionClosureType" or something like that.
2339 QualType Result = MemPtr->getPointeeType();
John McCall0953e762009-09-24 19:53:00 +00002340 Result = Context.getCVRQualifiedType(Result, LType.getCVRQualifiers());
Sebastian Redl7c8bd602009-02-07 20:10:22 +00002341 return Result;
2342}
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002343
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002344/// \brief Try to convert a type to another according to C++0x 5.16p3.
2345///
2346/// This is part of the parameter validation for the ? operator. If either
2347/// value operand is a class type, the two operands are attempted to be
2348/// converted to each other. This function does the conversion in one direction.
Douglas Gregorb70cf442010-03-26 20:14:36 +00002349/// It returns true if the program is ill-formed and has already been diagnosed
2350/// as such.
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002351static bool TryClassUnification(Sema &Self, Expr *From, Expr *To,
2352 SourceLocation QuestionLoc,
Douglas Gregorb70cf442010-03-26 20:14:36 +00002353 bool &HaveConversion,
2354 QualType &ToType) {
2355 HaveConversion = false;
2356 ToType = To->getType();
2357
2358 InitializationKind Kind = InitializationKind::CreateCopy(To->getLocStart(),
2359 SourceLocation());
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002360 // C++0x 5.16p3
2361 // The process for determining whether an operand expression E1 of type T1
2362 // can be converted to match an operand expression E2 of type T2 is defined
2363 // as follows:
2364 // -- If E2 is an lvalue:
Douglas Gregor0fd8ff72010-03-26 20:59:55 +00002365 bool ToIsLvalue = (To->isLvalue(Self.Context) == Expr::LV_Valid);
2366 if (ToIsLvalue) {
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002367 // E1 can be converted to match E2 if E1 can be implicitly converted to
2368 // type "lvalue reference to T2", subject to the constraint that in the
2369 // conversion the reference must bind directly to E1.
Douglas Gregorb70cf442010-03-26 20:14:36 +00002370 QualType T = Self.Context.getLValueReferenceType(ToType);
2371 InitializedEntity Entity = InitializedEntity::InitializeTemporary(T);
2372
2373 InitializationSequence InitSeq(Self, Entity, Kind, &From, 1);
2374 if (InitSeq.isDirectReferenceBinding()) {
2375 ToType = T;
2376 HaveConversion = true;
2377 return false;
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002378 }
Douglas Gregorb70cf442010-03-26 20:14:36 +00002379
2380 if (InitSeq.isAmbiguous())
2381 return InitSeq.Diagnose(Self, Entity, Kind, &From, 1);
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002382 }
John McCallb1bdc622010-02-25 01:37:24 +00002383
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002384 // -- If E2 is an rvalue, or if the conversion above cannot be done:
2385 // -- if E1 and E2 have class type, and the underlying class types are
2386 // the same or one is a base class of the other:
2387 QualType FTy = From->getType();
2388 QualType TTy = To->getType();
Ted Kremenek6217b802009-07-29 21:53:49 +00002389 const RecordType *FRec = FTy->getAs<RecordType>();
2390 const RecordType *TRec = TTy->getAs<RecordType>();
Douglas Gregorb70cf442010-03-26 20:14:36 +00002391 bool FDerivedFromT = FRec && TRec && FRec != TRec &&
2392 Self.IsDerivedFrom(FTy, TTy);
2393 if (FRec && TRec &&
2394 (FRec == TRec || FDerivedFromT || Self.IsDerivedFrom(TTy, FTy))) {
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002395 // E1 can be converted to match E2 if the class of T2 is the
2396 // same type as, or a base class of, the class of T1, and
2397 // [cv2 > cv1].
John McCallb1bdc622010-02-25 01:37:24 +00002398 if (FRec == TRec || FDerivedFromT) {
2399 if (TTy.isAtLeastAsQualifiedAs(FTy)) {
Douglas Gregorb70cf442010-03-26 20:14:36 +00002400 InitializedEntity Entity = InitializedEntity::InitializeTemporary(TTy);
2401 InitializationSequence InitSeq(Self, Entity, Kind, &From, 1);
2402 if (InitSeq.getKind() != InitializationSequence::FailedSequence) {
2403 HaveConversion = true;
2404 return false;
2405 }
2406
2407 if (InitSeq.isAmbiguous())
2408 return InitSeq.Diagnose(Self, Entity, Kind, &From, 1);
2409 }
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002410 }
Douglas Gregorb70cf442010-03-26 20:14:36 +00002411
2412 return false;
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002413 }
Douglas Gregorb70cf442010-03-26 20:14:36 +00002414
2415 // -- Otherwise: E1 can be converted to match E2 if E1 can be
2416 // implicitly converted to the type that expression E2 would have
Douglas Gregor0fd8ff72010-03-26 20:59:55 +00002417 // if E2 were converted to an rvalue (or the type it has, if E2 is
2418 // an rvalue).
2419 //
2420 // This actually refers very narrowly to the lvalue-to-rvalue conversion, not
2421 // to the array-to-pointer or function-to-pointer conversions.
2422 if (!TTy->getAs<TagType>())
2423 TTy = TTy.getUnqualifiedType();
Douglas Gregorb70cf442010-03-26 20:14:36 +00002424
2425 InitializedEntity Entity = InitializedEntity::InitializeTemporary(TTy);
2426 InitializationSequence InitSeq(Self, Entity, Kind, &From, 1);
2427 HaveConversion = InitSeq.getKind() != InitializationSequence::FailedSequence;
2428 ToType = TTy;
2429 if (InitSeq.isAmbiguous())
2430 return InitSeq.Diagnose(Self, Entity, Kind, &From, 1);
2431
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002432 return false;
2433}
2434
2435/// \brief Try to find a common type for two according to C++0x 5.16p5.
2436///
2437/// This is part of the parameter validation for the ? operator. If either
2438/// value operand is a class type, overload resolution is used to find a
2439/// conversion to a common type.
2440static bool FindConditionalOverload(Sema &Self, Expr *&LHS, Expr *&RHS,
2441 SourceLocation Loc) {
2442 Expr *Args[2] = { LHS, RHS };
John McCall5769d612010-02-08 23:07:23 +00002443 OverloadCandidateSet CandidateSet(Loc);
Douglas Gregor573d9c32009-10-21 23:19:44 +00002444 Self.AddBuiltinOperatorCandidates(OO_Conditional, Loc, Args, 2, CandidateSet);
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002445
2446 OverloadCandidateSet::iterator Best;
John McCall120d63c2010-08-24 20:38:10 +00002447 switch (CandidateSet.BestViableFunction(Self, Loc, Best)) {
Douglas Gregor20093b42009-12-09 23:02:17 +00002448 case OR_Success:
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002449 // We found a match. Perform the conversions on the arguments and move on.
2450 if (Self.PerformImplicitConversion(LHS, Best->BuiltinTypes.ParamTypes[0],
Douglas Gregor68647482009-12-16 03:45:30 +00002451 Best->Conversions[0], Sema::AA_Converting) ||
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002452 Self.PerformImplicitConversion(RHS, Best->BuiltinTypes.ParamTypes[1],
Douglas Gregor68647482009-12-16 03:45:30 +00002453 Best->Conversions[1], Sema::AA_Converting))
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002454 break;
2455 return false;
2456
Douglas Gregor20093b42009-12-09 23:02:17 +00002457 case OR_No_Viable_Function:
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002458 Self.Diag(Loc, diag::err_typecheck_cond_incompatible_operands)
2459 << LHS->getType() << RHS->getType()
2460 << LHS->getSourceRange() << RHS->getSourceRange();
2461 return true;
2462
Douglas Gregor20093b42009-12-09 23:02:17 +00002463 case OR_Ambiguous:
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002464 Self.Diag(Loc, diag::err_conditional_ambiguous_ovl)
2465 << LHS->getType() << RHS->getType()
2466 << LHS->getSourceRange() << RHS->getSourceRange();
Mike Stump390b4cc2009-05-16 07:39:55 +00002467 // FIXME: Print the possible common types by printing the return types of
2468 // the viable candidates.
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002469 break;
2470
Douglas Gregor20093b42009-12-09 23:02:17 +00002471 case OR_Deleted:
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002472 assert(false && "Conditional operator has only built-in overloads");
2473 break;
2474 }
2475 return true;
2476}
2477
Sebastian Redl76458502009-04-17 16:30:52 +00002478/// \brief Perform an "extended" implicit conversion as returned by
2479/// TryClassUnification.
Douglas Gregorb70cf442010-03-26 20:14:36 +00002480static bool ConvertForConditional(Sema &Self, Expr *&E, QualType T) {
2481 InitializedEntity Entity = InitializedEntity::InitializeTemporary(T);
2482 InitializationKind Kind = InitializationKind::CreateCopy(E->getLocStart(),
2483 SourceLocation());
2484 InitializationSequence InitSeq(Self, Entity, Kind, &E, 1);
John McCallf312b1e2010-08-26 23:41:50 +00002485 ExprResult Result = InitSeq.Perform(Self, Entity, Kind, MultiExprArg(&E, 1));
Douglas Gregorb70cf442010-03-26 20:14:36 +00002486 if (Result.isInvalid())
Sebastian Redl76458502009-04-17 16:30:52 +00002487 return true;
Douglas Gregorb70cf442010-03-26 20:14:36 +00002488
2489 E = Result.takeAs<Expr>();
Sebastian Redl76458502009-04-17 16:30:52 +00002490 return false;
2491}
2492
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002493/// \brief Check the operands of ?: under C++ semantics.
2494///
2495/// See C++ [expr.cond]. Note that LHS is never null, even for the GNU x ?: y
2496/// extension. In this case, LHS == Cond. (But they're not aliases.)
2497QualType Sema::CXXCheckConditionalOperands(Expr *&Cond, Expr *&LHS, Expr *&RHS,
Fariborz Jahanian1fb019b2010-09-18 19:38:38 +00002498 Expr *&SAVE,
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002499 SourceLocation QuestionLoc) {
Mike Stump390b4cc2009-05-16 07:39:55 +00002500 // FIXME: Handle C99's complex types, vector types, block pointers and Obj-C++
2501 // interface pointers.
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002502
2503 // C++0x 5.16p1
2504 // The first expression is contextually converted to bool.
2505 if (!Cond->isTypeDependent()) {
Fariborz Jahanian1fb019b2010-09-18 19:38:38 +00002506 if (SAVE && Cond->getType()->isArrayType()) {
2507 QualType CondTy = Cond->getType();
2508 CondTy = Context.getArrayDecayedType(CondTy);
2509 ImpCastExprToType(Cond, CondTy, CK_ArrayToPointerDecay);
2510 SAVE = LHS = Cond;
2511 }
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002512 if (CheckCXXBooleanCondition(Cond))
2513 return QualType();
2514 }
2515
2516 // Either of the arguments dependent?
2517 if (LHS->isTypeDependent() || RHS->isTypeDependent())
2518 return Context.DependentTy;
2519
2520 // C++0x 5.16p2
2521 // If either the second or the third operand has type (cv) void, ...
2522 QualType LTy = LHS->getType();
2523 QualType RTy = RHS->getType();
2524 bool LVoid = LTy->isVoidType();
2525 bool RVoid = RTy->isVoidType();
2526 if (LVoid || RVoid) {
2527 // ... then the [l2r] conversions are performed on the second and third
2528 // operands ...
Douglas Gregora873dfc2010-02-03 00:27:59 +00002529 DefaultFunctionArrayLvalueConversion(LHS);
2530 DefaultFunctionArrayLvalueConversion(RHS);
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002531 LTy = LHS->getType();
2532 RTy = RHS->getType();
2533
2534 // ... and one of the following shall hold:
2535 // -- The second or the third operand (but not both) is a throw-
2536 // expression; the result is of the type of the other and is an rvalue.
2537 bool LThrow = isa<CXXThrowExpr>(LHS);
2538 bool RThrow = isa<CXXThrowExpr>(RHS);
2539 if (LThrow && !RThrow)
2540 return RTy;
2541 if (RThrow && !LThrow)
2542 return LTy;
2543
2544 // -- Both the second and third operands have type void; the result is of
2545 // type void and is an rvalue.
2546 if (LVoid && RVoid)
2547 return Context.VoidTy;
2548
2549 // Neither holds, error.
2550 Diag(QuestionLoc, diag::err_conditional_void_nonvoid)
2551 << (LVoid ? RTy : LTy) << (LVoid ? 0 : 1)
2552 << LHS->getSourceRange() << RHS->getSourceRange();
2553 return QualType();
2554 }
2555
2556 // Neither is void.
2557
2558 // C++0x 5.16p3
2559 // Otherwise, if the second and third operand have different types, and
2560 // either has (cv) class type, and attempt is made to convert each of those
2561 // operands to the other.
Douglas Gregorb70cf442010-03-26 20:14:36 +00002562 if (!Context.hasSameType(LTy, RTy) &&
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002563 (LTy->isRecordType() || RTy->isRecordType())) {
2564 ImplicitConversionSequence ICSLeftToRight, ICSRightToLeft;
2565 // These return true if a single direction is already ambiguous.
Douglas Gregorb70cf442010-03-26 20:14:36 +00002566 QualType L2RType, R2LType;
2567 bool HaveL2R, HaveR2L;
2568 if (TryClassUnification(*this, LHS, RHS, QuestionLoc, HaveL2R, L2RType))
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002569 return QualType();
Douglas Gregorb70cf442010-03-26 20:14:36 +00002570 if (TryClassUnification(*this, RHS, LHS, QuestionLoc, HaveR2L, R2LType))
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002571 return QualType();
Douglas Gregorb70cf442010-03-26 20:14:36 +00002572
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002573 // If both can be converted, [...] the program is ill-formed.
2574 if (HaveL2R && HaveR2L) {
2575 Diag(QuestionLoc, diag::err_conditional_ambiguous)
2576 << LTy << RTy << LHS->getSourceRange() << RHS->getSourceRange();
2577 return QualType();
2578 }
2579
2580 // If exactly one conversion is possible, that conversion is applied to
2581 // the chosen operand and the converted operands are used in place of the
2582 // original operands for the remainder of this section.
2583 if (HaveL2R) {
Douglas Gregorb70cf442010-03-26 20:14:36 +00002584 if (ConvertForConditional(*this, LHS, L2RType))
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002585 return QualType();
2586 LTy = LHS->getType();
2587 } else if (HaveR2L) {
Douglas Gregorb70cf442010-03-26 20:14:36 +00002588 if (ConvertForConditional(*this, RHS, R2LType))
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002589 return QualType();
2590 RTy = RHS->getType();
2591 }
2592 }
2593
2594 // C++0x 5.16p4
2595 // If the second and third operands are lvalues and have the same type,
2596 // the result is of that type [...]
Douglas Gregor1927b1f2010-04-01 22:47:07 +00002597 bool Same = Context.hasSameType(LTy, RTy);
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002598 if (Same && LHS->isLvalue(Context) == Expr::LV_Valid &&
Fariborz Jahanian3911a1a2010-09-25 01:08:05 +00002599 RHS->isLvalue(Context) == Expr::LV_Valid) {
2600 // In this context, property reference is really a message call and
2601 // is not considered an l-value.
2602 bool lhsProperty = (isa<ObjCPropertyRefExpr>(LHS) ||
2603 isa<ObjCImplicitSetterGetterRefExpr>(LHS));
2604 bool rhsProperty = (isa<ObjCPropertyRefExpr>(RHS) ||
2605 isa<ObjCImplicitSetterGetterRefExpr>(RHS));
2606 if (!lhsProperty && !rhsProperty)
2607 return LTy;
2608 }
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002609
2610 // C++0x 5.16p5
2611 // Otherwise, the result is an rvalue. If the second and third operands
2612 // do not have the same type, and either has (cv) class type, ...
2613 if (!Same && (LTy->isRecordType() || RTy->isRecordType())) {
2614 // ... overload resolution is used to determine the conversions (if any)
2615 // to be applied to the operands. If the overload resolution fails, the
2616 // program is ill-formed.
2617 if (FindConditionalOverload(*this, LHS, RHS, QuestionLoc))
2618 return QualType();
2619 }
2620
2621 // C++0x 5.16p6
2622 // LValue-to-rvalue, array-to-pointer, and function-to-pointer standard
2623 // conversions are performed on the second and third operands.
Douglas Gregora873dfc2010-02-03 00:27:59 +00002624 DefaultFunctionArrayLvalueConversion(LHS);
2625 DefaultFunctionArrayLvalueConversion(RHS);
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002626 LTy = LHS->getType();
2627 RTy = RHS->getType();
2628
2629 // After those conversions, one of the following shall hold:
2630 // -- The second and third operands have the same type; the result
Douglas Gregorb65a4582010-05-19 23:40:50 +00002631 // is of that type. If the operands have class type, the result
2632 // is a prvalue temporary of the result type, which is
2633 // copy-initialized from either the second operand or the third
2634 // operand depending on the value of the first operand.
2635 if (Context.getCanonicalType(LTy) == Context.getCanonicalType(RTy)) {
2636 if (LTy->isRecordType()) {
2637 // The operands have class type. Make a temporary copy.
2638 InitializedEntity Entity = InitializedEntity::InitializeTemporary(LTy);
John McCall60d7b3a2010-08-24 06:29:42 +00002639 ExprResult LHSCopy = PerformCopyInitialization(Entity,
Douglas Gregorb65a4582010-05-19 23:40:50 +00002640 SourceLocation(),
2641 Owned(LHS));
2642 if (LHSCopy.isInvalid())
2643 return QualType();
2644
John McCall60d7b3a2010-08-24 06:29:42 +00002645 ExprResult RHSCopy = PerformCopyInitialization(Entity,
Douglas Gregorb65a4582010-05-19 23:40:50 +00002646 SourceLocation(),
2647 Owned(RHS));
2648 if (RHSCopy.isInvalid())
2649 return QualType();
2650
2651 LHS = LHSCopy.takeAs<Expr>();
2652 RHS = RHSCopy.takeAs<Expr>();
2653 }
2654
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002655 return LTy;
Douglas Gregorb65a4582010-05-19 23:40:50 +00002656 }
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002657
Douglas Gregorfb4a5432010-05-18 22:42:18 +00002658 // Extension: conditional operator involving vector types.
2659 if (LTy->isVectorType() || RTy->isVectorType())
2660 return CheckVectorOperands(QuestionLoc, LHS, RHS);
2661
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002662 // -- The second and third operands have arithmetic or enumeration type;
2663 // the usual arithmetic conversions are performed to bring them to a
2664 // common type, and the result is of that type.
2665 if (LTy->isArithmeticType() && RTy->isArithmeticType()) {
2666 UsualArithmeticConversions(LHS, RHS);
2667 return LHS->getType();
2668 }
2669
2670 // -- The second and third operands have pointer type, or one has pointer
2671 // type and the other is a null pointer constant; pointer conversions
2672 // and qualification conversions are performed to bring them to their
2673 // composite pointer type. The result is of the composite pointer type.
Eli Friedmande8ac492010-01-02 22:56:07 +00002674 // -- The second and third operands have pointer to member type, or one has
2675 // pointer to member type and the other is a null pointer constant;
2676 // pointer to member conversions and qualification conversions are
2677 // performed to bring them to a common type, whose cv-qualification
2678 // shall match the cv-qualification of either the second or the third
2679 // operand. The result is of the common type.
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002680 bool NonStandardCompositeType = false;
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002681 QualType Composite = FindCompositePointerType(QuestionLoc, LHS, RHS,
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002682 isSFINAEContext()? 0 : &NonStandardCompositeType);
2683 if (!Composite.isNull()) {
2684 if (NonStandardCompositeType)
2685 Diag(QuestionLoc,
2686 diag::ext_typecheck_cond_incompatible_operands_nonstandard)
2687 << LTy << RTy << Composite
2688 << LHS->getSourceRange() << RHS->getSourceRange();
2689
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002690 return Composite;
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002691 }
Fariborz Jahanian55016362009-12-10 20:46:08 +00002692
Douglas Gregor1927b1f2010-04-01 22:47:07 +00002693 // Similarly, attempt to find composite type of two objective-c pointers.
Fariborz Jahanian55016362009-12-10 20:46:08 +00002694 Composite = FindCompositeObjCPointerType(LHS, RHS, QuestionLoc);
2695 if (!Composite.isNull())
2696 return Composite;
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002697
Sebastian Redl3201f6b2009-04-16 17:51:27 +00002698 Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands)
2699 << LHS->getType() << RHS->getType()
2700 << LHS->getSourceRange() << RHS->getSourceRange();
2701 return QualType();
2702}
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002703
2704/// \brief Find a merged pointer type and convert the two expressions to it.
2705///
Douglas Gregor20b3e992009-08-24 17:42:35 +00002706/// This finds the composite pointer type (or member pointer type) for @p E1
2707/// and @p E2 according to C++0x 5.9p2. It converts both expressions to this
2708/// type and returns it.
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002709/// It does not emit diagnostics.
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002710///
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002711/// \param Loc The location of the operator requiring these two expressions to
2712/// be converted to the composite pointer type.
2713///
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002714/// If \p NonStandardCompositeType is non-NULL, then we are permitted to find
2715/// a non-standard (but still sane) composite type to which both expressions
2716/// can be converted. When such a type is chosen, \c *NonStandardCompositeType
2717/// will be set true.
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002718QualType Sema::FindCompositePointerType(SourceLocation Loc,
2719 Expr *&E1, Expr *&E2,
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002720 bool *NonStandardCompositeType) {
2721 if (NonStandardCompositeType)
2722 *NonStandardCompositeType = false;
2723
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002724 assert(getLangOptions().CPlusPlus && "This function assumes C++");
2725 QualType T1 = E1->getType(), T2 = E2->getType();
Mike Stump1eb44332009-09-09 15:08:12 +00002726
Fariborz Jahanian0cedfbd2009-12-08 20:04:24 +00002727 if (!T1->isAnyPointerType() && !T1->isMemberPointerType() &&
2728 !T2->isAnyPointerType() && !T2->isMemberPointerType())
Douglas Gregor20b3e992009-08-24 17:42:35 +00002729 return QualType();
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002730
2731 // C++0x 5.9p2
2732 // Pointer conversions and qualification conversions are performed on
2733 // pointer operands to bring them to their composite pointer type. If
2734 // one operand is a null pointer constant, the composite pointer type is
2735 // the type of the other operand.
Douglas Gregorce940492009-09-25 04:25:58 +00002736 if (E1->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) {
Eli Friedman73c39ab2009-10-20 08:27:19 +00002737 if (T2->isMemberPointerType())
John McCall2de56d12010-08-25 11:45:40 +00002738 ImpCastExprToType(E1, T2, CK_NullToMemberPointer);
Eli Friedman73c39ab2009-10-20 08:27:19 +00002739 else
John McCall2de56d12010-08-25 11:45:40 +00002740 ImpCastExprToType(E1, T2, CK_IntegralToPointer);
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002741 return T2;
2742 }
Douglas Gregorce940492009-09-25 04:25:58 +00002743 if (E2->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) {
Eli Friedman73c39ab2009-10-20 08:27:19 +00002744 if (T1->isMemberPointerType())
John McCall2de56d12010-08-25 11:45:40 +00002745 ImpCastExprToType(E2, T1, CK_NullToMemberPointer);
Eli Friedman73c39ab2009-10-20 08:27:19 +00002746 else
John McCall2de56d12010-08-25 11:45:40 +00002747 ImpCastExprToType(E2, T1, CK_IntegralToPointer);
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002748 return T1;
2749 }
Mike Stump1eb44332009-09-09 15:08:12 +00002750
Douglas Gregor20b3e992009-08-24 17:42:35 +00002751 // Now both have to be pointers or member pointers.
Sebastian Redla439e6f2009-11-16 21:03:45 +00002752 if ((!T1->isPointerType() && !T1->isMemberPointerType()) ||
2753 (!T2->isPointerType() && !T2->isMemberPointerType()))
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002754 return QualType();
2755
2756 // Otherwise, of one of the operands has type "pointer to cv1 void," then
2757 // the other has type "pointer to cv2 T" and the composite pointer type is
2758 // "pointer to cv12 void," where cv12 is the union of cv1 and cv2.
2759 // Otherwise, the composite pointer type is a pointer type similar to the
2760 // type of one of the operands, with a cv-qualification signature that is
2761 // the union of the cv-qualification signatures of the operand types.
2762 // In practice, the first part here is redundant; it's subsumed by the second.
2763 // What we do here is, we build the two possible composite types, and try the
2764 // conversions in both directions. If only one works, or if the two composite
2765 // types are the same, we have succeeded.
John McCall0953e762009-09-24 19:53:00 +00002766 // FIXME: extended qualifiers?
Sebastian Redla439e6f2009-11-16 21:03:45 +00002767 typedef llvm::SmallVector<unsigned, 4> QualifierVector;
2768 QualifierVector QualifierUnion;
2769 typedef llvm::SmallVector<std::pair<const Type *, const Type *>, 4>
2770 ContainingClassVector;
2771 ContainingClassVector MemberOfClass;
2772 QualType Composite1 = Context.getCanonicalType(T1),
2773 Composite2 = Context.getCanonicalType(T2);
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002774 unsigned NeedConstBefore = 0;
Douglas Gregor20b3e992009-08-24 17:42:35 +00002775 do {
2776 const PointerType *Ptr1, *Ptr2;
2777 if ((Ptr1 = Composite1->getAs<PointerType>()) &&
2778 (Ptr2 = Composite2->getAs<PointerType>())) {
2779 Composite1 = Ptr1->getPointeeType();
2780 Composite2 = Ptr2->getPointeeType();
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002781
2782 // If we're allowed to create a non-standard composite type, keep track
2783 // of where we need to fill in additional 'const' qualifiers.
2784 if (NonStandardCompositeType &&
2785 Composite1.getCVRQualifiers() != Composite2.getCVRQualifiers())
2786 NeedConstBefore = QualifierUnion.size();
2787
Douglas Gregor20b3e992009-08-24 17:42:35 +00002788 QualifierUnion.push_back(
2789 Composite1.getCVRQualifiers() | Composite2.getCVRQualifiers());
2790 MemberOfClass.push_back(std::make_pair((const Type *)0, (const Type *)0));
2791 continue;
2792 }
Mike Stump1eb44332009-09-09 15:08:12 +00002793
Douglas Gregor20b3e992009-08-24 17:42:35 +00002794 const MemberPointerType *MemPtr1, *MemPtr2;
2795 if ((MemPtr1 = Composite1->getAs<MemberPointerType>()) &&
2796 (MemPtr2 = Composite2->getAs<MemberPointerType>())) {
2797 Composite1 = MemPtr1->getPointeeType();
2798 Composite2 = MemPtr2->getPointeeType();
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002799
2800 // If we're allowed to create a non-standard composite type, keep track
2801 // of where we need to fill in additional 'const' qualifiers.
2802 if (NonStandardCompositeType &&
2803 Composite1.getCVRQualifiers() != Composite2.getCVRQualifiers())
2804 NeedConstBefore = QualifierUnion.size();
2805
Douglas Gregor20b3e992009-08-24 17:42:35 +00002806 QualifierUnion.push_back(
2807 Composite1.getCVRQualifiers() | Composite2.getCVRQualifiers());
2808 MemberOfClass.push_back(std::make_pair(MemPtr1->getClass(),
2809 MemPtr2->getClass()));
2810 continue;
2811 }
Mike Stump1eb44332009-09-09 15:08:12 +00002812
Douglas Gregor20b3e992009-08-24 17:42:35 +00002813 // FIXME: block pointer types?
Mike Stump1eb44332009-09-09 15:08:12 +00002814
Douglas Gregor20b3e992009-08-24 17:42:35 +00002815 // Cannot unwrap any more types.
2816 break;
2817 } while (true);
Mike Stump1eb44332009-09-09 15:08:12 +00002818
Douglas Gregorb2cb1cb2010-02-25 22:29:57 +00002819 if (NeedConstBefore && NonStandardCompositeType) {
2820 // Extension: Add 'const' to qualifiers that come before the first qualifier
2821 // mismatch, so that our (non-standard!) composite type meets the
2822 // requirements of C++ [conv.qual]p4 bullet 3.
2823 for (unsigned I = 0; I != NeedConstBefore; ++I) {
2824 if ((QualifierUnion[I] & Qualifiers::Const) == 0) {
2825 QualifierUnion[I] = QualifierUnion[I] | Qualifiers::Const;
2826 *NonStandardCompositeType = true;
2827 }
2828 }
2829 }
2830
Douglas Gregor20b3e992009-08-24 17:42:35 +00002831 // Rewrap the composites as pointers or member pointers with the union CVRs.
Sebastian Redla439e6f2009-11-16 21:03:45 +00002832 ContainingClassVector::reverse_iterator MOC
2833 = MemberOfClass.rbegin();
2834 for (QualifierVector::reverse_iterator
2835 I = QualifierUnion.rbegin(),
2836 E = QualifierUnion.rend();
Douglas Gregor20b3e992009-08-24 17:42:35 +00002837 I != E; (void)++I, ++MOC) {
John McCall0953e762009-09-24 19:53:00 +00002838 Qualifiers Quals = Qualifiers::fromCVRMask(*I);
Douglas Gregor20b3e992009-08-24 17:42:35 +00002839 if (MOC->first && MOC->second) {
2840 // Rebuild member pointer type
John McCall0953e762009-09-24 19:53:00 +00002841 Composite1 = Context.getMemberPointerType(
2842 Context.getQualifiedType(Composite1, Quals),
2843 MOC->first);
2844 Composite2 = Context.getMemberPointerType(
2845 Context.getQualifiedType(Composite2, Quals),
2846 MOC->second);
Douglas Gregor20b3e992009-08-24 17:42:35 +00002847 } else {
2848 // Rebuild pointer type
John McCall0953e762009-09-24 19:53:00 +00002849 Composite1
2850 = Context.getPointerType(Context.getQualifiedType(Composite1, Quals));
2851 Composite2
2852 = Context.getPointerType(Context.getQualifiedType(Composite2, Quals));
Douglas Gregor20b3e992009-08-24 17:42:35 +00002853 }
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002854 }
2855
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002856 // Try to convert to the first composite pointer type.
2857 InitializedEntity Entity1
2858 = InitializedEntity::InitializeTemporary(Composite1);
2859 InitializationKind Kind
2860 = InitializationKind::CreateCopy(Loc, SourceLocation());
2861 InitializationSequence E1ToC1(*this, Entity1, Kind, &E1, 1);
2862 InitializationSequence E2ToC1(*this, Entity1, Kind, &E2, 1);
Mike Stump1eb44332009-09-09 15:08:12 +00002863
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002864 if (E1ToC1 && E2ToC1) {
2865 // Conversion to Composite1 is viable.
2866 if (!Context.hasSameType(Composite1, Composite2)) {
2867 // Composite2 is a different type from Composite1. Check whether
2868 // Composite2 is also viable.
2869 InitializedEntity Entity2
2870 = InitializedEntity::InitializeTemporary(Composite2);
2871 InitializationSequence E1ToC2(*this, Entity2, Kind, &E1, 1);
2872 InitializationSequence E2ToC2(*this, Entity2, Kind, &E2, 1);
2873 if (E1ToC2 && E2ToC2) {
2874 // Both Composite1 and Composite2 are viable and are different;
2875 // this is an ambiguity.
2876 return QualType();
2877 }
2878 }
2879
2880 // Convert E1 to Composite1
John McCall60d7b3a2010-08-24 06:29:42 +00002881 ExprResult E1Result
John McCallca0408f2010-08-23 06:44:23 +00002882 = E1ToC1.Perform(*this, Entity1, Kind, MultiExprArg(*this,&E1,1));
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002883 if (E1Result.isInvalid())
2884 return QualType();
2885 E1 = E1Result.takeAs<Expr>();
2886
2887 // Convert E2 to Composite1
John McCall60d7b3a2010-08-24 06:29:42 +00002888 ExprResult E2Result
John McCallca0408f2010-08-23 06:44:23 +00002889 = E2ToC1.Perform(*this, Entity1, Kind, MultiExprArg(*this,&E2,1));
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002890 if (E2Result.isInvalid())
2891 return QualType();
2892 E2 = E2Result.takeAs<Expr>();
2893
2894 return Composite1;
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002895 }
2896
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002897 // Check whether Composite2 is viable.
2898 InitializedEntity Entity2
2899 = InitializedEntity::InitializeTemporary(Composite2);
2900 InitializationSequence E1ToC2(*this, Entity2, Kind, &E1, 1);
2901 InitializationSequence E2ToC2(*this, Entity2, Kind, &E2, 1);
2902 if (!E1ToC2 || !E2ToC2)
2903 return QualType();
2904
2905 // Convert E1 to Composite2
John McCall60d7b3a2010-08-24 06:29:42 +00002906 ExprResult E1Result
John McCallca0408f2010-08-23 06:44:23 +00002907 = E1ToC2.Perform(*this, Entity2, Kind, MultiExprArg(*this, &E1, 1));
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002908 if (E1Result.isInvalid())
2909 return QualType();
2910 E1 = E1Result.takeAs<Expr>();
2911
2912 // Convert E2 to Composite2
John McCall60d7b3a2010-08-24 06:29:42 +00002913 ExprResult E2Result
John McCallca0408f2010-08-23 06:44:23 +00002914 = E2ToC2.Perform(*this, Entity2, Kind, MultiExprArg(*this, &E2, 1));
Douglas Gregor8f00dcf2010-04-16 23:20:25 +00002915 if (E2Result.isInvalid())
2916 return QualType();
2917 E2 = E2Result.takeAs<Expr>();
2918
2919 return Composite2;
Sebastian Redld1bd7fc2009-04-19 19:26:31 +00002920}
Anders Carlsson165a0a02009-05-17 18:41:29 +00002921
John McCall60d7b3a2010-08-24 06:29:42 +00002922ExprResult Sema::MaybeBindToTemporary(Expr *E) {
Anders Carlsson089c2602009-08-15 23:41:35 +00002923 if (!Context.getLangOptions().CPlusPlus)
2924 return Owned(E);
Mike Stump1eb44332009-09-09 15:08:12 +00002925
Douglas Gregor51326552009-12-24 18:51:59 +00002926 assert(!isa<CXXBindTemporaryExpr>(E) && "Double-bound temporary?");
2927
Ted Kremenek6217b802009-07-29 21:53:49 +00002928 const RecordType *RT = E->getType()->getAs<RecordType>();
Anders Carlssondef11992009-05-30 20:36:53 +00002929 if (!RT)
2930 return Owned(E);
Mike Stump1eb44332009-09-09 15:08:12 +00002931
Anders Carlsson0ea4dfd2010-07-16 21:18:37 +00002932 // If this is the result of a call or an Objective-C message send expression,
2933 // our source might actually be a reference, in which case we shouldn't bind.
Anders Carlsson283e4d52009-09-14 01:30:44 +00002934 if (CallExpr *CE = dyn_cast<CallExpr>(E)) {
Anders Carlsson0ea4dfd2010-07-16 21:18:37 +00002935 if (CE->getCallReturnType()->isReferenceType())
Anders Carlsson283e4d52009-09-14 01:30:44 +00002936 return Owned(E);
Anders Carlsson0ea4dfd2010-07-16 21:18:37 +00002937 } else if (ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) {
2938 if (const ObjCMethodDecl *MD = ME->getMethodDecl()) {
2939 if (MD->getResultType()->isReferenceType())
2940 return Owned(E);
2941 }
Anders Carlsson283e4d52009-09-14 01:30:44 +00002942 }
John McCall86ff3082010-02-04 22:26:26 +00002943
2944 // That should be enough to guarantee that this type is complete.
2945 // If it has a trivial destructor, we can avoid the extra copy.
2946 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
John McCall507384f2010-08-12 02:40:37 +00002947 if (RD->isInvalidDecl() || RD->hasTrivialDestructor())
John McCall86ff3082010-02-04 22:26:26 +00002948 return Owned(E);
2949
Douglas Gregordb89f282010-07-01 22:47:18 +00002950 CXXTemporary *Temp = CXXTemporary::Create(Context, LookupDestructor(RD));
Anders Carlsson860306e2009-05-30 21:21:49 +00002951 ExprTemporaries.push_back(Temp);
Douglas Gregordb89f282010-07-01 22:47:18 +00002952 if (CXXDestructorDecl *Destructor = LookupDestructor(RD)) {
Fariborz Jahaniana83f7ed2009-08-03 19:13:25 +00002953 MarkDeclarationReferenced(E->getExprLoc(), Destructor);
John McCallc91cc662010-04-07 00:41:46 +00002954 CheckDestructorAccess(E->getExprLoc(), Destructor,
2955 PDiag(diag::err_access_dtor_temp)
2956 << E->getType());
2957 }
Anders Carlssondef11992009-05-30 20:36:53 +00002958 // FIXME: Add the temporary to the temporaries vector.
2959 return Owned(CXXBindTemporaryExpr::Create(Context, Temp, E));
2960}
2961
Anders Carlsson0ece4912009-12-15 20:51:39 +00002962Expr *Sema::MaybeCreateCXXExprWithTemporaries(Expr *SubExpr) {
Anders Carlsson99ba36d2009-06-05 15:38:08 +00002963 assert(SubExpr && "sub expression can't be null!");
Mike Stump1eb44332009-09-09 15:08:12 +00002964
Douglas Gregor1f5f3a42009-12-03 17:10:37 +00002965 unsigned FirstTemporary = ExprEvalContexts.back().NumTemporaries;
2966 assert(ExprTemporaries.size() >= FirstTemporary);
2967 if (ExprTemporaries.size() == FirstTemporary)
Anders Carlsson99ba36d2009-06-05 15:38:08 +00002968 return SubExpr;
Mike Stump1eb44332009-09-09 15:08:12 +00002969
Anders Carlsson99ba36d2009-06-05 15:38:08 +00002970 Expr *E = CXXExprWithTemporaries::Create(Context, SubExpr,
Douglas Gregor1f5f3a42009-12-03 17:10:37 +00002971 &ExprTemporaries[FirstTemporary],
Anders Carlsson0ece4912009-12-15 20:51:39 +00002972 ExprTemporaries.size() - FirstTemporary);
Douglas Gregor1f5f3a42009-12-03 17:10:37 +00002973 ExprTemporaries.erase(ExprTemporaries.begin() + FirstTemporary,
2974 ExprTemporaries.end());
Mike Stump1eb44332009-09-09 15:08:12 +00002975
Anders Carlsson99ba36d2009-06-05 15:38:08 +00002976 return E;
2977}
2978
John McCall60d7b3a2010-08-24 06:29:42 +00002979ExprResult
2980Sema::MaybeCreateCXXExprWithTemporaries(ExprResult SubExpr) {
Douglas Gregor90f93822009-12-22 22:17:25 +00002981 if (SubExpr.isInvalid())
2982 return ExprError();
2983
2984 return Owned(MaybeCreateCXXExprWithTemporaries(SubExpr.takeAs<Expr>()));
2985}
2986
Anders Carlsson5ee56e92009-12-16 02:09:40 +00002987FullExpr Sema::CreateFullExpr(Expr *SubExpr) {
2988 unsigned FirstTemporary = ExprEvalContexts.back().NumTemporaries;
2989 assert(ExprTemporaries.size() >= FirstTemporary);
2990
2991 unsigned NumTemporaries = ExprTemporaries.size() - FirstTemporary;
2992 CXXTemporary **Temporaries =
2993 NumTemporaries == 0 ? 0 : &ExprTemporaries[FirstTemporary];
2994
2995 FullExpr E = FullExpr::Create(Context, SubExpr, Temporaries, NumTemporaries);
2996
2997 ExprTemporaries.erase(ExprTemporaries.begin() + FirstTemporary,
2998 ExprTemporaries.end());
2999
3000 return E;
3001}
3002
John McCall60d7b3a2010-08-24 06:29:42 +00003003ExprResult
John McCall9ae2f072010-08-23 23:25:46 +00003004Sema::ActOnStartCXXMemberReference(Scope *S, Expr *Base, SourceLocation OpLoc,
John McCallb3d87482010-08-24 05:47:05 +00003005 tok::TokenKind OpKind, ParsedType &ObjectType,
Douglas Gregord4dca082010-02-24 18:44:31 +00003006 bool &MayBePseudoDestructor) {
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003007 // Since this might be a postfix expression, get rid of ParenListExprs.
John McCall60d7b3a2010-08-24 06:29:42 +00003008 ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Base);
John McCall9ae2f072010-08-23 23:25:46 +00003009 if (Result.isInvalid()) return ExprError();
3010 Base = Result.get();
Mike Stump1eb44332009-09-09 15:08:12 +00003011
John McCall9ae2f072010-08-23 23:25:46 +00003012 QualType BaseType = Base->getType();
Douglas Gregord4dca082010-02-24 18:44:31 +00003013 MayBePseudoDestructor = false;
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003014 if (BaseType->isDependentType()) {
Douglas Gregor43d88632009-11-04 22:49:18 +00003015 // If we have a pointer to a dependent type and are using the -> operator,
3016 // the object type is the type that the pointer points to. We might still
3017 // have enough information about that type to do something useful.
3018 if (OpKind == tok::arrow)
3019 if (const PointerType *Ptr = BaseType->getAs<PointerType>())
3020 BaseType = Ptr->getPointeeType();
3021
John McCallb3d87482010-08-24 05:47:05 +00003022 ObjectType = ParsedType::make(BaseType);
Douglas Gregord4dca082010-02-24 18:44:31 +00003023 MayBePseudoDestructor = true;
John McCall9ae2f072010-08-23 23:25:46 +00003024 return Owned(Base);
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003025 }
Mike Stump1eb44332009-09-09 15:08:12 +00003026
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003027 // C++ [over.match.oper]p8:
Mike Stump1eb44332009-09-09 15:08:12 +00003028 // [...] When operator->returns, the operator-> is applied to the value
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003029 // returned, with the original second operand.
3030 if (OpKind == tok::arrow) {
John McCallc4e83212009-09-30 01:01:30 +00003031 // The set of types we've considered so far.
John McCall432887f2009-09-30 01:30:54 +00003032 llvm::SmallPtrSet<CanQualType,8> CTypes;
Fariborz Jahanian7a8233a2009-09-30 17:46:20 +00003033 llvm::SmallVector<SourceLocation, 8> Locations;
John McCall432887f2009-09-30 01:30:54 +00003034 CTypes.insert(Context.getCanonicalType(BaseType));
John McCallc4e83212009-09-30 01:01:30 +00003035
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003036 while (BaseType->isRecordType()) {
John McCall9ae2f072010-08-23 23:25:46 +00003037 Result = BuildOverloadedArrowExpr(S, Base, OpLoc);
3038 if (Result.isInvalid())
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003039 return ExprError();
John McCall9ae2f072010-08-23 23:25:46 +00003040 Base = Result.get();
3041 if (CXXOperatorCallExpr *OpCall = dyn_cast<CXXOperatorCallExpr>(Base))
Anders Carlssonde699e52009-10-13 22:55:59 +00003042 Locations.push_back(OpCall->getDirectCallee()->getLocation());
John McCall9ae2f072010-08-23 23:25:46 +00003043 BaseType = Base->getType();
John McCallc4e83212009-09-30 01:01:30 +00003044 CanQualType CBaseType = Context.getCanonicalType(BaseType);
John McCall432887f2009-09-30 01:30:54 +00003045 if (!CTypes.insert(CBaseType)) {
Fariborz Jahanian4a4e3452009-09-30 00:19:41 +00003046 Diag(OpLoc, diag::err_operator_arrow_circular);
Fariborz Jahanian7a8233a2009-09-30 17:46:20 +00003047 for (unsigned i = 0; i < Locations.size(); i++)
3048 Diag(Locations[i], diag::note_declared_at);
Fariborz Jahanian4a4e3452009-09-30 00:19:41 +00003049 return ExprError();
3050 }
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003051 }
Mike Stump1eb44332009-09-09 15:08:12 +00003052
Douglas Gregor31658df2009-11-20 19:58:21 +00003053 if (BaseType->isPointerType())
3054 BaseType = BaseType->getPointeeType();
3055 }
Mike Stump1eb44332009-09-09 15:08:12 +00003056
3057 // We could end up with various non-record types here, such as extended
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003058 // vector types or Objective-C interfaces. Just return early and let
3059 // ActOnMemberReferenceExpr do the work.
Douglas Gregorc68afe22009-09-03 21:38:09 +00003060 if (!BaseType->isRecordType()) {
3061 // C++ [basic.lookup.classref]p2:
3062 // [...] If the type of the object expression is of pointer to scalar
3063 // type, the unqualified-id is looked up in the context of the complete
3064 // postfix-expression.
Douglas Gregord4dca082010-02-24 18:44:31 +00003065 //
3066 // This also indicates that we should be parsing a
3067 // pseudo-destructor-name.
John McCallb3d87482010-08-24 05:47:05 +00003068 ObjectType = ParsedType();
Douglas Gregord4dca082010-02-24 18:44:31 +00003069 MayBePseudoDestructor = true;
John McCall9ae2f072010-08-23 23:25:46 +00003070 return Owned(Base);
Douglas Gregorc68afe22009-09-03 21:38:09 +00003071 }
Mike Stump1eb44332009-09-09 15:08:12 +00003072
Douglas Gregor03c57052009-11-17 05:17:33 +00003073 // The object type must be complete (or dependent).
3074 if (!BaseType->isDependentType() &&
3075 RequireCompleteType(OpLoc, BaseType,
3076 PDiag(diag::err_incomplete_member_access)))
3077 return ExprError();
3078
Douglas Gregorc68afe22009-09-03 21:38:09 +00003079 // C++ [basic.lookup.classref]p2:
Mike Stump1eb44332009-09-09 15:08:12 +00003080 // If the id-expression in a class member access (5.2.5) is an
Douglas Gregor03c57052009-11-17 05:17:33 +00003081 // unqualified-id, and the type of the object expression is of a class
Douglas Gregorc68afe22009-09-03 21:38:09 +00003082 // type C (or of pointer to a class type C), the unqualified-id is looked
3083 // up in the scope of class C. [...]
John McCallb3d87482010-08-24 05:47:05 +00003084 ObjectType = ParsedType::make(BaseType);
Mike Stump1eb44332009-09-09 15:08:12 +00003085 return move(Base);
Douglas Gregor2dd078a2009-09-02 22:59:36 +00003086}
3087
John McCall60d7b3a2010-08-24 06:29:42 +00003088ExprResult Sema::DiagnoseDtorReference(SourceLocation NameLoc,
John McCall9ae2f072010-08-23 23:25:46 +00003089 Expr *MemExpr) {
Douglas Gregor77549082010-02-24 21:29:12 +00003090 SourceLocation ExpectedLParenLoc = PP.getLocForEndOfToken(NameLoc);
John McCall9ae2f072010-08-23 23:25:46 +00003091 Diag(MemExpr->getLocStart(), diag::err_dtor_expr_without_call)
3092 << isa<CXXPseudoDestructorExpr>(MemExpr)
Douglas Gregor849b2432010-03-31 17:46:05 +00003093 << FixItHint::CreateInsertion(ExpectedLParenLoc, "()");
Douglas Gregor77549082010-02-24 21:29:12 +00003094
3095 return ActOnCallExpr(/*Scope*/ 0,
John McCall9ae2f072010-08-23 23:25:46 +00003096 MemExpr,
Douglas Gregor77549082010-02-24 21:29:12 +00003097 /*LPLoc*/ ExpectedLParenLoc,
John McCallf312b1e2010-08-26 23:41:50 +00003098 MultiExprArg(),
Douglas Gregor77549082010-02-24 21:29:12 +00003099 /*RPLoc*/ ExpectedLParenLoc);
3100}
Douglas Gregord4dca082010-02-24 18:44:31 +00003101
John McCall60d7b3a2010-08-24 06:29:42 +00003102ExprResult Sema::BuildPseudoDestructorExpr(Expr *Base,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003103 SourceLocation OpLoc,
3104 tok::TokenKind OpKind,
3105 const CXXScopeSpec &SS,
Douglas Gregor26d4ac92010-02-24 23:40:28 +00003106 TypeSourceInfo *ScopeTypeInfo,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003107 SourceLocation CCLoc,
Douglas Gregorfce46ee2010-02-24 23:50:37 +00003108 SourceLocation TildeLoc,
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003109 PseudoDestructorTypeStorage Destructed,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003110 bool HasTrailingLParen) {
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003111 TypeSourceInfo *DestructedTypeInfo = Destructed.getTypeSourceInfo();
Douglas Gregorb57fb492010-02-24 22:38:50 +00003112
3113 // C++ [expr.pseudo]p2:
3114 // The left-hand side of the dot operator shall be of scalar type. The
3115 // left-hand side of the arrow operator shall be of pointer to scalar type.
3116 // This scalar type is the object type.
John McCall9ae2f072010-08-23 23:25:46 +00003117 QualType ObjectType = Base->getType();
Douglas Gregorb57fb492010-02-24 22:38:50 +00003118 if (OpKind == tok::arrow) {
3119 if (const PointerType *Ptr = ObjectType->getAs<PointerType>()) {
3120 ObjectType = Ptr->getPointeeType();
John McCall9ae2f072010-08-23 23:25:46 +00003121 } else if (!Base->isTypeDependent()) {
Douglas Gregorb57fb492010-02-24 22:38:50 +00003122 // The user wrote "p->" when she probably meant "p."; fix it.
3123 Diag(OpLoc, diag::err_typecheck_member_reference_suggestion)
3124 << ObjectType << true
Douglas Gregor849b2432010-03-31 17:46:05 +00003125 << FixItHint::CreateReplacement(OpLoc, ".");
Douglas Gregorb57fb492010-02-24 22:38:50 +00003126 if (isSFINAEContext())
3127 return ExprError();
3128
3129 OpKind = tok::period;
3130 }
3131 }
3132
3133 if (!ObjectType->isDependentType() && !ObjectType->isScalarType()) {
3134 Diag(OpLoc, diag::err_pseudo_dtor_base_not_scalar)
John McCall9ae2f072010-08-23 23:25:46 +00003135 << ObjectType << Base->getSourceRange();
Douglas Gregorb57fb492010-02-24 22:38:50 +00003136 return ExprError();
3137 }
3138
3139 // C++ [expr.pseudo]p2:
3140 // [...] The cv-unqualified versions of the object type and of the type
3141 // designated by the pseudo-destructor-name shall be the same type.
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003142 if (DestructedTypeInfo) {
3143 QualType DestructedType = DestructedTypeInfo->getType();
3144 SourceLocation DestructedTypeStart
Abramo Bagnarabd054db2010-05-20 10:00:11 +00003145 = DestructedTypeInfo->getTypeLoc().getLocalSourceRange().getBegin();
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003146 if (!DestructedType->isDependentType() && !ObjectType->isDependentType() &&
3147 !Context.hasSameUnqualifiedType(DestructedType, ObjectType)) {
3148 Diag(DestructedTypeStart, diag::err_pseudo_dtor_type_mismatch)
John McCall9ae2f072010-08-23 23:25:46 +00003149 << ObjectType << DestructedType << Base->getSourceRange()
Abramo Bagnarabd054db2010-05-20 10:00:11 +00003150 << DestructedTypeInfo->getTypeLoc().getLocalSourceRange();
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003151
3152 // Recover by setting the destructed type to the object type.
3153 DestructedType = ObjectType;
3154 DestructedTypeInfo = Context.getTrivialTypeSourceInfo(ObjectType,
3155 DestructedTypeStart);
3156 Destructed = PseudoDestructorTypeStorage(DestructedTypeInfo);
3157 }
Douglas Gregorb57fb492010-02-24 22:38:50 +00003158 }
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003159
Douglas Gregorb57fb492010-02-24 22:38:50 +00003160 // C++ [expr.pseudo]p2:
3161 // [...] Furthermore, the two type-names in a pseudo-destructor-name of the
3162 // form
3163 //
3164 // ::[opt] nested-name-specifier[opt] type-name :: ~ type-name
3165 //
3166 // shall designate the same scalar type.
3167 if (ScopeTypeInfo) {
3168 QualType ScopeType = ScopeTypeInfo->getType();
3169 if (!ScopeType->isDependentType() && !ObjectType->isDependentType() &&
John McCall81e317a2010-06-11 17:36:40 +00003170 !Context.hasSameUnqualifiedType(ScopeType, ObjectType)) {
Douglas Gregorb57fb492010-02-24 22:38:50 +00003171
Abramo Bagnarabd054db2010-05-20 10:00:11 +00003172 Diag(ScopeTypeInfo->getTypeLoc().getLocalSourceRange().getBegin(),
Douglas Gregorb57fb492010-02-24 22:38:50 +00003173 diag::err_pseudo_dtor_type_mismatch)
John McCall9ae2f072010-08-23 23:25:46 +00003174 << ObjectType << ScopeType << Base->getSourceRange()
Abramo Bagnarabd054db2010-05-20 10:00:11 +00003175 << ScopeTypeInfo->getTypeLoc().getLocalSourceRange();
Douglas Gregorb57fb492010-02-24 22:38:50 +00003176
3177 ScopeType = QualType();
3178 ScopeTypeInfo = 0;
3179 }
3180 }
3181
John McCall9ae2f072010-08-23 23:25:46 +00003182 Expr *Result
3183 = new (Context) CXXPseudoDestructorExpr(Context, Base,
3184 OpKind == tok::arrow, OpLoc,
3185 SS.getScopeRep(), SS.getRange(),
3186 ScopeTypeInfo,
3187 CCLoc,
3188 TildeLoc,
3189 Destructed);
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003190
Douglas Gregorb57fb492010-02-24 22:38:50 +00003191 if (HasTrailingLParen)
John McCall9ae2f072010-08-23 23:25:46 +00003192 return Owned(Result);
Douglas Gregorb57fb492010-02-24 22:38:50 +00003193
John McCall9ae2f072010-08-23 23:25:46 +00003194 return DiagnoseDtorReference(Destructed.getLocation(), Result);
Douglas Gregor77549082010-02-24 21:29:12 +00003195}
3196
John McCall60d7b3a2010-08-24 06:29:42 +00003197ExprResult Sema::ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
Douglas Gregor77549082010-02-24 21:29:12 +00003198 SourceLocation OpLoc,
3199 tok::TokenKind OpKind,
Jeffrey Yasskin9ab14542010-04-08 16:38:48 +00003200 CXXScopeSpec &SS,
Douglas Gregor77549082010-02-24 21:29:12 +00003201 UnqualifiedId &FirstTypeName,
3202 SourceLocation CCLoc,
3203 SourceLocation TildeLoc,
3204 UnqualifiedId &SecondTypeName,
3205 bool HasTrailingLParen) {
3206 assert((FirstTypeName.getKind() == UnqualifiedId::IK_TemplateId ||
3207 FirstTypeName.getKind() == UnqualifiedId::IK_Identifier) &&
3208 "Invalid first type name in pseudo-destructor");
3209 assert((SecondTypeName.getKind() == UnqualifiedId::IK_TemplateId ||
3210 SecondTypeName.getKind() == UnqualifiedId::IK_Identifier) &&
3211 "Invalid second type name in pseudo-destructor");
3212
Douglas Gregor77549082010-02-24 21:29:12 +00003213 // C++ [expr.pseudo]p2:
3214 // The left-hand side of the dot operator shall be of scalar type. The
3215 // left-hand side of the arrow operator shall be of pointer to scalar type.
3216 // This scalar type is the object type.
John McCall9ae2f072010-08-23 23:25:46 +00003217 QualType ObjectType = Base->getType();
Douglas Gregor77549082010-02-24 21:29:12 +00003218 if (OpKind == tok::arrow) {
3219 if (const PointerType *Ptr = ObjectType->getAs<PointerType>()) {
3220 ObjectType = Ptr->getPointeeType();
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003221 } else if (!ObjectType->isDependentType()) {
Douglas Gregor77549082010-02-24 21:29:12 +00003222 // The user wrote "p->" when she probably meant "p."; fix it.
3223 Diag(OpLoc, diag::err_typecheck_member_reference_suggestion)
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003224 << ObjectType << true
Douglas Gregor849b2432010-03-31 17:46:05 +00003225 << FixItHint::CreateReplacement(OpLoc, ".");
Douglas Gregor77549082010-02-24 21:29:12 +00003226 if (isSFINAEContext())
3227 return ExprError();
3228
3229 OpKind = tok::period;
3230 }
3231 }
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003232
3233 // Compute the object type that we should use for name lookup purposes. Only
3234 // record types and dependent types matter.
John McCallb3d87482010-08-24 05:47:05 +00003235 ParsedType ObjectTypePtrForLookup;
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003236 if (!SS.isSet()) {
John McCallb3d87482010-08-24 05:47:05 +00003237 if (const Type *T = ObjectType->getAs<RecordType>())
3238 ObjectTypePtrForLookup = ParsedType::make(QualType(T, 0));
3239 else if (ObjectType->isDependentType())
3240 ObjectTypePtrForLookup = ParsedType::make(Context.DependentTy);
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003241 }
Douglas Gregor77549082010-02-24 21:29:12 +00003242
Douglas Gregorb57fb492010-02-24 22:38:50 +00003243 // Convert the name of the type being destructed (following the ~) into a
3244 // type (with source-location information).
Douglas Gregor77549082010-02-24 21:29:12 +00003245 QualType DestructedType;
3246 TypeSourceInfo *DestructedTypeInfo = 0;
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003247 PseudoDestructorTypeStorage Destructed;
Douglas Gregor77549082010-02-24 21:29:12 +00003248 if (SecondTypeName.getKind() == UnqualifiedId::IK_Identifier) {
John McCallb3d87482010-08-24 05:47:05 +00003249 ParsedType T = getTypeName(*SecondTypeName.Identifier,
3250 SecondTypeName.StartLocation,
3251 S, &SS, true, ObjectTypePtrForLookup);
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003252 if (!T &&
3253 ((SS.isSet() && !computeDeclContext(SS, false)) ||
3254 (!SS.isSet() && ObjectType->isDependentType()))) {
3255 // The name of the type being destroyed is a dependent name, and we
3256 // couldn't find anything useful in scope. Just store the identifier and
3257 // it's location, and we'll perform (qualified) name lookup again at
3258 // template instantiation time.
3259 Destructed = PseudoDestructorTypeStorage(SecondTypeName.Identifier,
3260 SecondTypeName.StartLocation);
3261 } else if (!T) {
Douglas Gregor77549082010-02-24 21:29:12 +00003262 Diag(SecondTypeName.StartLocation,
3263 diag::err_pseudo_dtor_destructor_non_type)
3264 << SecondTypeName.Identifier << ObjectType;
3265 if (isSFINAEContext())
3266 return ExprError();
3267
3268 // Recover by assuming we had the right type all along.
3269 DestructedType = ObjectType;
Douglas Gregorb57fb492010-02-24 22:38:50 +00003270 } else
Douglas Gregor77549082010-02-24 21:29:12 +00003271 DestructedType = GetTypeFromParser(T, &DestructedTypeInfo);
Douglas Gregor77549082010-02-24 21:29:12 +00003272 } else {
Douglas Gregorb57fb492010-02-24 22:38:50 +00003273 // Resolve the template-id to a type.
Douglas Gregor77549082010-02-24 21:29:12 +00003274 TemplateIdAnnotation *TemplateId = SecondTypeName.TemplateId;
Douglas Gregorb57fb492010-02-24 22:38:50 +00003275 ASTTemplateArgsPtr TemplateArgsPtr(*this,
3276 TemplateId->getTemplateArgs(),
3277 TemplateId->NumArgs);
John McCall2b5289b2010-08-23 07:28:44 +00003278 TypeResult T = ActOnTemplateIdType(TemplateId->Template,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003279 TemplateId->TemplateNameLoc,
3280 TemplateId->LAngleLoc,
3281 TemplateArgsPtr,
3282 TemplateId->RAngleLoc);
3283 if (T.isInvalid() || !T.get()) {
3284 // Recover by assuming we had the right type all along.
3285 DestructedType = ObjectType;
3286 } else
3287 DestructedType = GetTypeFromParser(T.get(), &DestructedTypeInfo);
Douglas Gregor77549082010-02-24 21:29:12 +00003288 }
3289
Douglas Gregorb57fb492010-02-24 22:38:50 +00003290 // If we've performed some kind of recovery, (re-)build the type source
3291 // information.
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003292 if (!DestructedType.isNull()) {
3293 if (!DestructedTypeInfo)
3294 DestructedTypeInfo = Context.getTrivialTypeSourceInfo(DestructedType,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003295 SecondTypeName.StartLocation);
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003296 Destructed = PseudoDestructorTypeStorage(DestructedTypeInfo);
3297 }
Douglas Gregorb57fb492010-02-24 22:38:50 +00003298
3299 // Convert the name of the scope type (the type prior to '::') into a type.
3300 TypeSourceInfo *ScopeTypeInfo = 0;
Douglas Gregor77549082010-02-24 21:29:12 +00003301 QualType ScopeType;
3302 if (FirstTypeName.getKind() == UnqualifiedId::IK_TemplateId ||
3303 FirstTypeName.Identifier) {
3304 if (FirstTypeName.getKind() == UnqualifiedId::IK_Identifier) {
John McCallb3d87482010-08-24 05:47:05 +00003305 ParsedType T = getTypeName(*FirstTypeName.Identifier,
3306 FirstTypeName.StartLocation,
3307 S, &SS, false, ObjectTypePtrForLookup);
Douglas Gregor77549082010-02-24 21:29:12 +00003308 if (!T) {
3309 Diag(FirstTypeName.StartLocation,
3310 diag::err_pseudo_dtor_destructor_non_type)
3311 << FirstTypeName.Identifier << ObjectType;
Douglas Gregor77549082010-02-24 21:29:12 +00003312
Douglas Gregorb57fb492010-02-24 22:38:50 +00003313 if (isSFINAEContext())
3314 return ExprError();
3315
3316 // Just drop this type. It's unnecessary anyway.
3317 ScopeType = QualType();
3318 } else
3319 ScopeType = GetTypeFromParser(T, &ScopeTypeInfo);
Douglas Gregor77549082010-02-24 21:29:12 +00003320 } else {
Douglas Gregorb57fb492010-02-24 22:38:50 +00003321 // Resolve the template-id to a type.
Douglas Gregor77549082010-02-24 21:29:12 +00003322 TemplateIdAnnotation *TemplateId = FirstTypeName.TemplateId;
Douglas Gregorb57fb492010-02-24 22:38:50 +00003323 ASTTemplateArgsPtr TemplateArgsPtr(*this,
3324 TemplateId->getTemplateArgs(),
3325 TemplateId->NumArgs);
John McCall2b5289b2010-08-23 07:28:44 +00003326 TypeResult T = ActOnTemplateIdType(TemplateId->Template,
Douglas Gregorb57fb492010-02-24 22:38:50 +00003327 TemplateId->TemplateNameLoc,
3328 TemplateId->LAngleLoc,
3329 TemplateArgsPtr,
3330 TemplateId->RAngleLoc);
3331 if (T.isInvalid() || !T.get()) {
3332 // Recover by dropping this type.
3333 ScopeType = QualType();
3334 } else
3335 ScopeType = GetTypeFromParser(T.get(), &ScopeTypeInfo);
Douglas Gregor77549082010-02-24 21:29:12 +00003336 }
3337 }
Douglas Gregorb4a418f2010-02-24 23:02:30 +00003338
3339 if (!ScopeType.isNull() && !ScopeTypeInfo)
3340 ScopeTypeInfo = Context.getTrivialTypeSourceInfo(ScopeType,
3341 FirstTypeName.StartLocation);
3342
3343
John McCall9ae2f072010-08-23 23:25:46 +00003344 return BuildPseudoDestructorExpr(Base, OpLoc, OpKind, SS,
Douglas Gregorfce46ee2010-02-24 23:50:37 +00003345 ScopeTypeInfo, CCLoc, TildeLoc,
Douglas Gregora2e7dd22010-02-25 01:56:36 +00003346 Destructed, HasTrailingLParen);
Douglas Gregord4dca082010-02-24 18:44:31 +00003347}
3348
Fariborz Jahanianb7400232009-09-28 23:23:40 +00003349CXXMemberCallExpr *Sema::BuildCXXMemberCallExpr(Expr *Exp,
John McCall6bb80172010-03-30 21:47:33 +00003350 NamedDecl *FoundDecl,
Fariborz Jahanianb7400232009-09-28 23:23:40 +00003351 CXXMethodDecl *Method) {
John McCall6bb80172010-03-30 21:47:33 +00003352 if (PerformObjectArgumentInitialization(Exp, /*Qualifier=*/0,
3353 FoundDecl, Method))
Eli Friedman772fffa2009-12-09 04:53:56 +00003354 assert(0 && "Calling BuildCXXMemberCallExpr with invalid call?");
3355
Fariborz Jahanianb7400232009-09-28 23:23:40 +00003356 MemberExpr *ME =
Abramo Bagnara25777432010-08-11 22:01:17 +00003357 new (Context) MemberExpr(Exp, /*IsArrow=*/false, Method,
Fariborz Jahanianb7400232009-09-28 23:23:40 +00003358 SourceLocation(), Method->getType());
Douglas Gregor5291c3c2010-07-13 08:18:22 +00003359 QualType ResultType = Method->getCallResultType();
Douglas Gregor7edfb692009-11-23 12:27:39 +00003360 MarkDeclarationReferenced(Exp->getLocStart(), Method);
3361 CXXMemberCallExpr *CE =
3362 new (Context) CXXMemberCallExpr(Context, ME, 0, 0, ResultType,
3363 Exp->getLocEnd());
Fariborz Jahanianb7400232009-09-28 23:23:40 +00003364 return CE;
3365}
3366
Sebastian Redl2e156222010-09-10 20:55:43 +00003367ExprResult Sema::BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
3368 SourceLocation RParen) {
Sebastian Redl2e156222010-09-10 20:55:43 +00003369 return Owned(new (Context) CXXNoexceptExpr(Context.BoolTy, Operand,
3370 Operand->CanThrow(Context),
3371 KeyLoc, RParen));
3372}
3373
3374ExprResult Sema::ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation,
3375 Expr *Operand, SourceLocation RParen) {
3376 return BuildCXXNoexceptExpr(KeyLoc, Operand, RParen);
Sebastian Redl02bc21a2010-09-10 20:55:37 +00003377}
3378
John McCall60d7b3a2010-08-24 06:29:42 +00003379ExprResult Sema::ActOnFinishFullExpr(Expr *FullExpr) {
John McCall9ae2f072010-08-23 23:25:46 +00003380 if (!FullExpr) return ExprError();
John McCallb4eb64d2010-10-08 02:01:28 +00003381
3382 CheckImplicitConversions(FullExpr);
John McCall9ae2f072010-08-23 23:25:46 +00003383 return MaybeCreateCXXExprWithTemporaries(FullExpr);
Anders Carlsson165a0a02009-05-17 18:41:29 +00003384}