1 //===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Declaration portions of the Parser interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/Parser.h"
15 #include "clang/Parse/ParseDiagnostic.h"
16 #include "clang/Parse/Scope.h"
17 #include "ExtensionRAIIObject.h"
18 #include "llvm/ADT/SmallSet.h"
19 using namespace clang;
21 //===----------------------------------------------------------------------===//
22 // C99 6.7: Declarations.
23 //===----------------------------------------------------------------------===//
26 /// type-name: [C99 6.7.6]
27 /// specifier-qualifier-list abstract-declarator[opt]
29 /// Called type-id in C++.
30 Action::TypeResult Parser::ParseTypeName(SourceRange *Range) {
31 // Parse the common declaration-specifiers piece.
33 ParseSpecifierQualifierList(DS);
35 // Parse the abstract-declarator, if present.
36 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
37 ParseDeclarator(DeclaratorInfo);
39 *Range = DeclaratorInfo.getSourceRange();
41 if (DeclaratorInfo.isInvalidType())
44 return Actions.ActOnTypeName(CurScope, DeclaratorInfo);
47 /// ParseAttributes - Parse a non-empty attributes list.
51 /// attributes attribute
54 /// '__attribute__' '(' '(' attribute-list ')' ')'
56 /// [GNU] attribute-list:
58 /// attribute_list ',' attrib
63 /// attrib-name '(' identifier ')'
64 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
65 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
67 /// [GNU] attrib-name:
73 /// FIXME: The GCC grammar/code for this construct implies we need two
74 /// token lookahead. Comment from gcc: "If they start with an identifier
75 /// which is followed by a comma or close parenthesis, then the arguments
76 /// start with that identifier; otherwise they are an expression list."
78 /// At the moment, I am not doing 2 token lookahead. I am also unaware of
79 /// any attributes that don't work (based on my limited testing). Most
80 /// attributes are very simple in practice. Until we find a bug, I don't see
81 /// a pressing need to implement the 2 token lookahead.
83 AttributeList *Parser::ParseAttributes(SourceLocation *EndLoc) {
84 assert(Tok.is(tok::kw___attribute) && "Not an attribute list!");
86 AttributeList *CurrAttr = 0;
88 while (Tok.is(tok::kw___attribute)) {
90 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
92 SkipUntil(tok::r_paren, true); // skip until ) or ;
95 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
96 SkipUntil(tok::r_paren, true); // skip until ) or ;
99 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
100 while (Tok.is(tok::identifier) || isDeclarationSpecifier() ||
101 Tok.is(tok::comma)) {
103 if (Tok.is(tok::comma)) {
104 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,))
108 // we have an identifier or declaration specifier (const, int, etc.)
109 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
110 SourceLocation AttrNameLoc = ConsumeToken();
112 // check if we have a "paramterized" attribute
113 if (Tok.is(tok::l_paren)) {
114 ConsumeParen(); // ignore the left paren loc for now
116 if (Tok.is(tok::identifier)) {
117 IdentifierInfo *ParmName = Tok.getIdentifierInfo();
118 SourceLocation ParmLoc = ConsumeToken();
120 if (Tok.is(tok::r_paren)) {
121 // __attribute__(( mode(byte) ))
122 ConsumeParen(); // ignore the right paren loc for now
123 CurrAttr = new AttributeList(AttrName, AttrNameLoc,
124 ParmName, ParmLoc, 0, 0, CurrAttr);
125 } else if (Tok.is(tok::comma)) {
127 // __attribute__(( format(printf, 1, 2) ))
128 ExprVector ArgExprs(Actions);
129 bool ArgExprsOk = true;
131 // now parse the non-empty comma separated list of expressions
133 OwningExprResult ArgExpr(ParseAssignmentExpression());
134 if (ArgExpr.isInvalid()) {
136 SkipUntil(tok::r_paren);
139 ArgExprs.push_back(ArgExpr.release());
141 if (Tok.isNot(tok::comma))
143 ConsumeToken(); // Eat the comma, move to the next argument
145 if (ArgExprsOk && Tok.is(tok::r_paren)) {
146 ConsumeParen(); // ignore the right paren loc for now
147 CurrAttr = new AttributeList(AttrName, AttrNameLoc, ParmName,
148 ParmLoc, ArgExprs.take(), ArgExprs.size(), CurrAttr);
151 } else { // not an identifier
152 switch (Tok.getKind()) {
154 // parse a possibly empty comma separated list of expressions
155 // __attribute__(( nonnull() ))
156 ConsumeParen(); // ignore the right paren loc for now
157 CurrAttr = new AttributeList(AttrName, AttrNameLoc,
158 0, SourceLocation(), 0, 0, CurrAttr);
161 case tok::kw_wchar_t:
167 case tok::kw_unsigned:
172 // If it's a builtin type name, eat it and expect a rparen
173 // __attribute__(( vec_type_hint(char) ))
175 CurrAttr = new AttributeList(AttrName, AttrNameLoc,
176 0, SourceLocation(), 0, 0, CurrAttr);
177 if (Tok.is(tok::r_paren))
181 // __attribute__(( aligned(16) ))
182 ExprVector ArgExprs(Actions);
183 bool ArgExprsOk = true;
185 // now parse the list of expressions
187 OwningExprResult ArgExpr(ParseAssignmentExpression());
188 if (ArgExpr.isInvalid()) {
190 SkipUntil(tok::r_paren);
193 ArgExprs.push_back(ArgExpr.release());
195 if (Tok.isNot(tok::comma))
197 ConsumeToken(); // Eat the comma, move to the next argument
200 if (ArgExprsOk && Tok.is(tok::r_paren)) {
201 ConsumeParen(); // ignore the right paren loc for now
202 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0,
203 SourceLocation(), ArgExprs.take(), ArgExprs.size(),
210 CurrAttr = new AttributeList(AttrName, AttrNameLoc,
211 0, SourceLocation(), 0, 0, CurrAttr);
214 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
215 SkipUntil(tok::r_paren, false);
216 SourceLocation Loc = Tok.getLocation();;
217 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) {
218 SkipUntil(tok::r_paren, false);
226 /// ParseMicrosoftDeclSpec - Parse an __declspec construct
228 /// [MS] decl-specifier:
229 /// __declspec ( extended-decl-modifier-seq )
231 /// [MS] extended-decl-modifier-seq:
232 /// extended-decl-modifier[opt]
233 /// extended-decl-modifier extended-decl-modifier-seq
235 AttributeList* Parser::ParseMicrosoftDeclSpec(AttributeList *CurrAttr) {
236 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
239 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
241 SkipUntil(tok::r_paren, true); // skip until ) or ;
244 while (Tok.getIdentifierInfo()) {
245 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
246 SourceLocation AttrNameLoc = ConsumeToken();
247 if (Tok.is(tok::l_paren)) {
249 // FIXME: This doesn't parse __declspec(property(get=get_func_name))
251 OwningExprResult ArgExpr(ParseAssignmentExpression());
252 if (!ArgExpr.isInvalid()) {
253 ExprTy* ExprList = ArgExpr.take();
254 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0,
255 SourceLocation(), &ExprList, 1,
258 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
259 SkipUntil(tok::r_paren, false);
261 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, SourceLocation(),
262 0, 0, CurrAttr, true);
265 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
266 SkipUntil(tok::r_paren, false);
270 AttributeList* Parser::ParseMicrosoftTypeAttributes(AttributeList *CurrAttr) {
271 // Treat these like attributes
272 // FIXME: Allow Sema to distinguish between these and real attributes!
273 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) ||
274 Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___ptr64) ||
275 Tok.is(tok::kw___w64)) {
276 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
277 SourceLocation AttrNameLoc = ConsumeToken();
278 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64))
279 // FIXME: Support these properly!
281 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0,
282 SourceLocation(), 0, 0, CurrAttr, true);
287 /// ParseDeclaration - Parse a full 'declaration', which consists of
288 /// declaration-specifiers, some number of declarators, and a semicolon.
289 /// 'Context' should be a Declarator::TheContext value. This returns the
290 /// location of the semicolon in DeclEnd.
292 /// declaration: [C99 6.7]
293 /// block-declaration ->
294 /// simple-declaration
296 /// [C++] template-declaration
297 /// [C++] namespace-definition
298 /// [C++] using-directive
299 /// [C++] using-declaration
300 /// [C++0x] static_assert-declaration
301 /// others... [FIXME]
303 Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context,
304 SourceLocation &DeclEnd) {
305 DeclPtrTy SingleDecl;
306 switch (Tok.getKind()) {
307 case tok::kw_template:
309 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
311 case tok::kw_namespace:
312 SingleDecl = ParseNamespace(Context, DeclEnd);
315 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, DeclEnd);
317 case tok::kw_static_assert:
318 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
321 return ParseSimpleDeclaration(Context, DeclEnd);
324 // This routine returns a DeclGroup, if the thing we parsed only contains a
325 // single decl, convert it now.
326 return Actions.ConvertDeclToDeclGroup(SingleDecl);
329 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
330 /// declaration-specifiers init-declarator-list[opt] ';'
331 ///[C90/C++]init-declarator-list ';' [TODO]
332 /// [OMP] threadprivate-directive [TODO]
334 /// If RequireSemi is false, this does not check for a ';' at the end of the
336 Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(unsigned Context,
337 SourceLocation &DeclEnd,
339 // Parse the common declaration-specifiers piece.
341 ParseDeclarationSpecifiers(DS);
343 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
344 // declaration-specifiers init-declarator-list[opt] ';'
345 if (Tok.is(tok::semi)) {
347 DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS);
348 return Actions.ConvertDeclToDeclGroup(TheDecl);
351 Declarator DeclaratorInfo(DS, (Declarator::TheContext)Context);
352 ParseDeclarator(DeclaratorInfo);
355 ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo);
357 DeclEnd = Tok.getLocation();
359 // If the client wants to check what comes after the declaration, just return
360 // immediately without checking anything!
361 if (!RequireSemi) return DG;
363 if (Tok.is(tok::semi)) {
368 Diag(Tok, diag::err_expected_semi_declation);
369 // Skip to end of block or statement
370 SkipUntil(tok::r_brace, true, true);
371 if (Tok.is(tok::semi))
376 /// \brief Parse 'declaration' after parsing 'declaration-specifiers
377 /// declarator'. This method parses the remainder of the declaration
378 /// (including any attributes or initializer, among other things) and
379 /// finalizes the declaration.
381 /// init-declarator: [C99 6.7]
383 /// declarator '=' initializer
384 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
385 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
386 /// [C++] declarator initializer[opt]
388 /// [C++] initializer:
389 /// [C++] '=' initializer-clause
390 /// [C++] '(' expression-list ')'
391 /// [C++0x] '=' 'default' [TODO]
392 /// [C++0x] '=' 'delete'
394 /// According to the standard grammar, =default and =delete are function
395 /// definitions, but that definitely doesn't fit with the parser here.
397 Parser::DeclPtrTy Parser::ParseDeclarationAfterDeclarator(Declarator &D,
398 const ParsedTemplateInfo &TemplateInfo) {
399 // If a simple-asm-expr is present, parse it.
400 if (Tok.is(tok::kw_asm)) {
402 OwningExprResult AsmLabel(ParseSimpleAsm(&Loc));
403 if (AsmLabel.isInvalid()) {
404 SkipUntil(tok::semi, true, true);
408 D.setAsmLabel(AsmLabel.release());
412 // If attributes are present, parse them.
413 if (Tok.is(tok::kw___attribute)) {
415 AttributeList *AttrList = ParseAttributes(&Loc);
416 D.AddAttributes(AttrList, Loc);
419 // Inform the current actions module that we just parsed this declarator.
420 DeclPtrTy ThisDecl = TemplateInfo.TemplateParams?
421 Actions.ActOnTemplateDeclarator(CurScope,
422 Action::MultiTemplateParamsArg(Actions,
423 TemplateInfo.TemplateParams->data(),
424 TemplateInfo.TemplateParams->size()),
426 : Actions.ActOnDeclarator(CurScope, D);
428 // Parse declarator '=' initializer.
429 if (Tok.is(tok::equal)) {
431 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) {
432 SourceLocation DelLoc = ConsumeToken();
433 Actions.SetDeclDeleted(ThisDecl, DelLoc);
435 if (getLang().CPlusPlus)
436 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl);
438 OwningExprResult Init(ParseInitializer());
440 if (getLang().CPlusPlus)
441 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl);
443 if (Init.isInvalid()) {
444 SkipUntil(tok::semi, true, true);
447 Actions.AddInitializerToDecl(ThisDecl, Actions.FullExpr(Init));
449 } else if (Tok.is(tok::l_paren)) {
450 // Parse C++ direct initializer: '(' expression-list ')'
451 SourceLocation LParenLoc = ConsumeParen();
452 ExprVector Exprs(Actions);
453 CommaLocsTy CommaLocs;
455 if (ParseExpressionList(Exprs, CommaLocs)) {
456 SkipUntil(tok::r_paren);
459 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
461 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
462 "Unexpected number of commas!");
463 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc,
465 CommaLocs.data(), RParenLoc);
468 Actions.ActOnUninitializedDecl(ThisDecl);
474 /// ParseInitDeclaratorListAfterFirstDeclarator - Parse 'declaration' after
475 /// parsing 'declaration-specifiers declarator'. This method is split out this
476 /// way to handle the ambiguity between top-level function-definitions and
479 /// init-declarator-list: [C99 6.7]
481 /// init-declarator-list ',' init-declarator
483 /// According to the standard grammar, =default and =delete are function
484 /// definitions, but that definitely doesn't fit with the parser here.
486 Parser::DeclGroupPtrTy Parser::
487 ParseInitDeclaratorListAfterFirstDeclarator(Declarator &D) {
488 // Declarators may be grouped together ("int X, *Y, Z();"). Remember the decls
489 // that we parse together here.
490 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup;
492 // At this point, we know that it is not a function definition. Parse the
493 // rest of the init-declarator-list.
495 DeclPtrTy ThisDecl = ParseDeclarationAfterDeclarator(D);
497 DeclsInGroup.push_back(ThisDecl);
499 // If we don't have a comma, it is either the end of the list (a ';') or an
501 if (Tok.isNot(tok::comma))
504 // Consume the comma.
507 // Parse the next declarator.
510 // Accept attributes in an init-declarator. In the first declarator in a
511 // declaration, these would be part of the declspec. In subsequent
512 // declarators, they become part of the declarator itself, so that they
513 // don't apply to declarators after *this* one. Examples:
514 // short __attribute__((common)) var; -> declspec
515 // short var __attribute__((common)); -> declarator
516 // short x, __attribute__((common)) var; -> declarator
517 if (Tok.is(tok::kw___attribute)) {
519 AttributeList *AttrList = ParseAttributes(&Loc);
520 D.AddAttributes(AttrList, Loc);
526 return Actions.FinalizeDeclaratorGroup(CurScope, D.getDeclSpec(),
528 DeclsInGroup.size());
531 /// ParseSpecifierQualifierList
532 /// specifier-qualifier-list:
533 /// type-specifier specifier-qualifier-list[opt]
534 /// type-qualifier specifier-qualifier-list[opt]
535 /// [GNU] attributes specifier-qualifier-list[opt]
537 void Parser::ParseSpecifierQualifierList(DeclSpec &DS) {
538 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
539 /// parse declaration-specifiers and complain about extra stuff.
540 ParseDeclarationSpecifiers(DS);
542 // Validate declspec for type-name.
543 unsigned Specs = DS.getParsedSpecifiers();
544 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() &&
546 Diag(Tok, diag::err_typename_requires_specqual);
548 // Issue diagnostic and remove storage class if present.
549 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
550 if (DS.getStorageClassSpecLoc().isValid())
551 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
553 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass);
554 DS.ClearStorageClassSpecs();
557 // Issue diagnostic and remove function specfier if present.
558 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
559 if (DS.isInlineSpecified())
560 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
561 if (DS.isVirtualSpecified())
562 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
563 if (DS.isExplicitSpecified())
564 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
565 DS.ClearFunctionSpecs();
569 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
570 /// specified token is valid after the identifier in a declarator which
571 /// immediately follows the declspec. For example, these things are valid:
573 /// int x [ 4]; // direct-declarator
574 /// int x ( int y); // direct-declarator
575 /// int(int x ) // direct-declarator
576 /// int x ; // simple-declaration
577 /// int x = 17; // init-declarator-list
578 /// int x , y; // init-declarator-list
579 /// int x __asm__ ("foo"); // init-declarator-list
580 /// int x : 4; // struct-declarator
581 /// int x { 5}; // C++'0x unified initializers
583 /// This is not, because 'x' does not immediately follow the declspec (though
584 /// ')' happens to be valid anyway).
587 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
588 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) ||
589 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) ||
590 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon);
594 /// ParseImplicitInt - This method is called when we have an non-typename
595 /// identifier in a declspec (which normally terminates the decl spec) when
596 /// the declspec has no type specifier. In this case, the declspec is either
597 /// malformed or is "implicit int" (in K&R and C89).
599 /// This method handles diagnosing this prettily and returns false if the
600 /// declspec is done being processed. If it recovers and thinks there may be
601 /// other pieces of declspec after it, it returns true.
603 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
604 const ParsedTemplateInfo &TemplateInfo,
605 AccessSpecifier AS) {
606 assert(Tok.is(tok::identifier) && "should have identifier");
608 SourceLocation Loc = Tok.getLocation();
609 // If we see an identifier that is not a type name, we normally would
610 // parse it as the identifer being declared. However, when a typename
611 // is typo'd or the definition is not included, this will incorrectly
612 // parse the typename as the identifier name and fall over misparsing
613 // later parts of the diagnostic.
615 // As such, we try to do some look-ahead in cases where this would
616 // otherwise be an "implicit-int" case to see if this is invalid. For
617 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
618 // an identifier with implicit int, we'd get a parse error because the
619 // next token is obviously invalid for a type. Parse these as a case
620 // with an invalid type specifier.
621 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
623 // Since we know that this either implicit int (which is rare) or an
624 // error, we'd do lookahead to try to do better recovery.
625 if (isValidAfterIdentifierInDeclarator(NextToken())) {
626 // If this token is valid for implicit int, e.g. "static x = 4", then
627 // we just avoid eating the identifier, so it will be parsed as the
628 // identifier in the declarator.
632 // Otherwise, if we don't consume this token, we are going to emit an
633 // error anyway. Try to recover from various common problems. Check
634 // to see if this was a reference to a tag name without a tag specified.
635 // This is a common problem in C (saying 'foo' instead of 'struct foo').
637 // C++ doesn't need this, and isTagName doesn't take SS.
639 const char *TagName = 0;
640 tok::TokenKind TagKind = tok::unknown;
642 switch (Actions.isTagName(*Tok.getIdentifierInfo(), CurScope)) {
644 case DeclSpec::TST_enum: TagName="enum" ;TagKind=tok::kw_enum ;break;
645 case DeclSpec::TST_union: TagName="union" ;TagKind=tok::kw_union ;break;
646 case DeclSpec::TST_struct:TagName="struct";TagKind=tok::kw_struct;break;
647 case DeclSpec::TST_class: TagName="class" ;TagKind=tok::kw_class ;break;
651 Diag(Loc, diag::err_use_of_tag_name_without_tag)
652 << Tok.getIdentifierInfo() << TagName
653 << CodeModificationHint::CreateInsertion(Tok.getLocation(),TagName);
655 // Parse this as a tag as if the missing tag were present.
656 if (TagKind == tok::kw_enum)
657 ParseEnumSpecifier(Loc, DS, AS);
659 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS);
664 // Since this is almost certainly an invalid type name, emit a
665 // diagnostic that says it, eat the token, and mark the declspec as
668 if (SS) R = SS->getRange();
670 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R;
671 const char *PrevSpec;
672 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec);
673 DS.SetRangeEnd(Tok.getLocation());
676 // TODO: Could inject an invalid typedef decl in an enclosing scope to
677 // avoid rippling error messages on subsequent uses of the same type,
678 // could be useful if #include was forgotten.
682 /// ParseDeclarationSpecifiers
683 /// declaration-specifiers: [C99 6.7]
684 /// storage-class-specifier declaration-specifiers[opt]
685 /// type-specifier declaration-specifiers[opt]
686 /// [C99] function-specifier declaration-specifiers[opt]
687 /// [GNU] attributes declaration-specifiers[opt]
689 /// storage-class-specifier: [C99 6.7.1]
697 /// function-specifier: [C99 6.7.4]
701 /// 'friend': [C++ dcl.friend]
704 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
705 const ParsedTemplateInfo &TemplateInfo,
706 AccessSpecifier AS) {
707 DS.SetRangeStart(Tok.getLocation());
709 int isInvalid = false;
710 const char *PrevSpec = 0;
711 SourceLocation Loc = Tok.getLocation();
713 switch (Tok.getKind()) {
716 // If this is not a declaration specifier token, we're done reading decl
717 // specifiers. First verify that DeclSpec's are consistent.
718 DS.Finish(Diags, PP);
721 case tok::coloncolon: // ::foo::bar
722 // Annotate C++ scope specifiers. If we get one, loop.
723 if (TryAnnotateCXXScopeToken())
725 goto DoneWithDeclSpec;
727 case tok::annot_cxxscope: {
728 if (DS.hasTypeSpecifier())
729 goto DoneWithDeclSpec;
731 // We are looking for a qualified typename.
732 Token Next = NextToken();
733 if (Next.is(tok::annot_template_id) &&
734 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
735 ->Kind == TNK_Type_template) {
736 // We have a qualified template-id, e.g., N::A<int>
738 ParseOptionalCXXScopeSpecifier(SS);
739 assert(Tok.is(tok::annot_template_id) &&
740 "ParseOptionalCXXScopeSpecifier not working");
741 AnnotateTemplateIdTokenAsType(&SS);
745 if (Next.isNot(tok::identifier))
746 goto DoneWithDeclSpec;
749 SS.setScopeRep(Tok.getAnnotationValue());
750 SS.setRange(Tok.getAnnotationRange());
752 // If the next token is the name of the class type that the C++ scope
753 // denotes, followed by a '(', then this is a constructor declaration.
754 // We're done with the decl-specifiers.
755 if (Actions.isCurrentClassName(*Next.getIdentifierInfo(),
757 GetLookAheadToken(2).is(tok::l_paren))
758 goto DoneWithDeclSpec;
760 TypeTy *TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(),
761 Next.getLocation(), CurScope, &SS);
763 // If the referenced identifier is not a type, then this declspec is
764 // erroneous: We already checked about that it has no type specifier, and
765 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
768 ConsumeToken(); // Eat the scope spec so the identifier is current.
769 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue;
770 goto DoneWithDeclSpec;
773 ConsumeToken(); // The C++ scope.
775 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
780 DS.SetRangeEnd(Tok.getLocation());
781 ConsumeToken(); // The typename.
786 case tok::annot_typename: {
787 if (Tok.getAnnotationValue())
788 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
789 Tok.getAnnotationValue());
791 DS.SetTypeSpecError();
792 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
793 ConsumeToken(); // The typename
795 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
796 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
797 // Objective-C interface. If we don't have Objective-C or a '<', this is
798 // just a normal reference to a typedef name.
799 if (!Tok.is(tok::less) || !getLang().ObjC1)
802 SourceLocation EndProtoLoc;
803 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl;
804 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
805 DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
807 DS.SetRangeEnd(EndProtoLoc);
812 case tok::identifier: {
813 // In C++, check to see if this is a scope specifier like foo::bar::, if
814 // so handle it as such. This is important for ctor parsing.
815 if (getLang().CPlusPlus && TryAnnotateCXXScopeToken())
818 // This identifier can only be a typedef name if we haven't already seen
819 // a type-specifier. Without this check we misparse:
820 // typedef int X; struct Y { short X; }; as 'short int'.
821 if (DS.hasTypeSpecifier())
822 goto DoneWithDeclSpec;
824 // It has to be available as a typedef too!
825 TypeTy *TypeRep = Actions.getTypeName(*Tok.getIdentifierInfo(),
826 Tok.getLocation(), CurScope);
828 // If this is not a typedef name, don't parse it as part of the declspec,
829 // it must be an implicit int or an error.
831 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue;
832 goto DoneWithDeclSpec;
835 // C++: If the identifier is actually the name of the class type
836 // being defined and the next token is a '(', then this is a
837 // constructor declaration. We're done with the decl-specifiers
838 // and will treat this token as an identifier.
839 if (getLang().CPlusPlus && CurScope->isClassScope() &&
840 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) &&
841 NextToken().getKind() == tok::l_paren)
842 goto DoneWithDeclSpec;
844 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
849 DS.SetRangeEnd(Tok.getLocation());
850 ConsumeToken(); // The identifier
852 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
853 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
854 // Objective-C interface. If we don't have Objective-C or a '<', this is
855 // just a normal reference to a typedef name.
856 if (!Tok.is(tok::less) || !getLang().ObjC1)
859 SourceLocation EndProtoLoc;
860 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl;
861 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
862 DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
864 DS.SetRangeEnd(EndProtoLoc);
866 // Need to support trailing type qualifiers (e.g. "id<p> const").
867 // If a type specifier follows, it will be diagnosed elsewhere.
872 case tok::annot_template_id: {
873 TemplateIdAnnotation *TemplateId
874 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
875 if (TemplateId->Kind != TNK_Type_template) {
876 // This template-id does not refer to a type name, so we're
877 // done with the type-specifiers.
878 goto DoneWithDeclSpec;
881 // Turn the template-id annotation token into a type annotation
882 // token, then try again to parse it as a type-specifier.
883 AnnotateTemplateIdTokenAsType();
887 // GNU attributes support.
888 case tok::kw___attribute:
889 DS.AddAttributes(ParseAttributes());
892 // Microsoft declspec support.
893 case tok::kw___declspec:
894 DS.AddAttributes(ParseMicrosoftDeclSpec());
897 // Microsoft single token adornments.
898 case tok::kw___forceinline:
899 // FIXME: Add handling here!
902 case tok::kw___ptr64:
904 case tok::kw___cdecl:
905 case tok::kw___stdcall:
906 case tok::kw___fastcall:
907 DS.AddAttributes(ParseMicrosoftTypeAttributes());
910 // storage-class-specifier
911 case tok::kw_typedef:
912 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec);
915 if (DS.isThreadSpecified())
916 Diag(Tok, diag::ext_thread_before) << "extern";
917 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec);
919 case tok::kw___private_extern__:
920 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc,
924 if (DS.isThreadSpecified())
925 Diag(Tok, diag::ext_thread_before) << "static";
926 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec);
929 if (getLang().CPlusPlus0x)
930 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec);
932 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec);
934 case tok::kw_register:
935 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec);
937 case tok::kw_mutable:
938 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec);
940 case tok::kw___thread:
941 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec)*2;
944 // function-specifier
946 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec);
948 case tok::kw_virtual:
949 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec);
951 case tok::kw_explicit:
952 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec);
957 isInvalid = DS.SetFriendSpec(Loc, PrevSpec);
962 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec);
965 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
966 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec);
968 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec);
971 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec);
973 case tok::kw_unsigned:
974 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec);
976 case tok::kw__Complex:
977 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec);
979 case tok::kw__Imaginary:
980 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec);
983 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec);
986 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec);
989 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec);
992 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec);
995 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec);
997 case tok::kw_wchar_t:
998 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec);
1002 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec);
1004 case tok::kw__Decimal32:
1005 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec);
1007 case tok::kw__Decimal64:
1008 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec);
1010 case tok::kw__Decimal128:
1011 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec);
1016 case tok::kw_struct:
1017 case tok::kw_union: {
1018 tok::TokenKind Kind = Tok.getKind();
1020 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS);
1027 ParseEnumSpecifier(Loc, DS, AS);
1032 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec,getLang())*2;
1034 case tok::kw_volatile:
1035 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
1038 case tok::kw_restrict:
1039 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
1043 // C++ typename-specifier:
1044 case tok::kw_typename:
1045 if (TryAnnotateTypeOrScopeToken())
1049 // GNU typeof support.
1050 case tok::kw_typeof:
1051 ParseTypeofSpecifier(DS);
1054 case tok::kw_decltype:
1055 ParseDecltypeSpecifier(DS);
1059 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
1060 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
1061 // but we support it.
1062 if (DS.hasTypeSpecifier() || !getLang().ObjC1)
1063 goto DoneWithDeclSpec;
1066 SourceLocation EndProtoLoc;
1067 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl;
1068 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
1069 DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
1070 DS.SetRangeEnd(EndProtoLoc);
1072 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
1073 << CodeModificationHint::CreateInsertion(Loc, "id")
1074 << SourceRange(Loc, EndProtoLoc);
1075 // Need to support trailing type qualifiers (e.g. "id<p> const").
1076 // If a type specifier follows, it will be diagnosed elsewhere.
1080 // If the specifier combination wasn't legal, issue a diagnostic.
1082 assert(PrevSpec && "Method did not return previous specifier!");
1083 // Pick between error or extwarn.
1084 unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
1085 : diag::ext_duplicate_declspec;
1086 Diag(Tok, DiagID) << PrevSpec;
1088 DS.SetRangeEnd(Tok.getLocation());
1093 /// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We
1094 /// primarily follow the C++ grammar with additions for C99 and GNU,
1095 /// which together subsume the C grammar. Note that the C++
1096 /// type-specifier also includes the C type-qualifier (for const,
1097 /// volatile, and C99 restrict). Returns true if a type-specifier was
1098 /// found (and parsed), false otherwise.
1100 /// type-specifier: [C++ 7.1.5]
1101 /// simple-type-specifier
1104 /// elaborated-type-specifier [TODO]
1107 /// cv-qualifier: [C++ 7.1.5.1]
1110 /// [C99] 'restrict'
1112 /// simple-type-specifier: [ C++ 7.1.5.2]
1113 /// '::'[opt] nested-name-specifier[opt] type-name [TODO]
1114 /// '::'[opt] nested-name-specifier 'template' template-id [TODO]
1127 /// [C99] '_Complex'
1128 /// [C99] '_Imaginary' // Removed in TC2?
1129 /// [GNU] '_Decimal32'
1130 /// [GNU] '_Decimal64'
1131 /// [GNU] '_Decimal128'
1132 /// [GNU] typeof-specifier
1133 /// [OBJC] class-name objc-protocol-refs[opt] [TODO]
1134 /// [OBJC] typedef-name objc-protocol-refs[opt] [TODO]
1135 /// [C++0x] 'decltype' ( expression )
1136 bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, int& isInvalid,
1137 const char *&PrevSpec,
1138 const ParsedTemplateInfo &TemplateInfo) {
1139 SourceLocation Loc = Tok.getLocation();
1141 switch (Tok.getKind()) {
1142 case tok::identifier: // foo::bar
1143 case tok::kw_typename: // typename foo::bar
1144 // Annotate typenames and C++ scope specifiers. If we get one, just
1145 // recurse to handle whatever we get.
1146 if (TryAnnotateTypeOrScopeToken())
1147 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, TemplateInfo);
1148 // Otherwise, not a type specifier.
1150 case tok::coloncolon: // ::foo::bar
1151 if (NextToken().is(tok::kw_new) || // ::new
1152 NextToken().is(tok::kw_delete)) // ::delete
1155 // Annotate typenames and C++ scope specifiers. If we get one, just
1156 // recurse to handle whatever we get.
1157 if (TryAnnotateTypeOrScopeToken())
1158 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, TemplateInfo);
1159 // Otherwise, not a type specifier.
1162 // simple-type-specifier:
1163 case tok::annot_typename: {
1164 if (Tok.getAnnotationValue())
1165 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
1166 Tok.getAnnotationValue());
1168 DS.SetTypeSpecError();
1169 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1170 ConsumeToken(); // The typename
1172 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
1173 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
1174 // Objective-C interface. If we don't have Objective-C or a '<', this is
1175 // just a normal reference to a typedef name.
1176 if (!Tok.is(tok::less) || !getLang().ObjC1)
1179 SourceLocation EndProtoLoc;
1180 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl;
1181 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
1182 DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
1184 DS.SetRangeEnd(EndProtoLoc);
1189 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec);
1192 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
1193 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec);
1195 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec);
1197 case tok::kw_signed:
1198 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec);
1200 case tok::kw_unsigned:
1201 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec);
1203 case tok::kw__Complex:
1204 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec);
1206 case tok::kw__Imaginary:
1207 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec);
1210 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec);
1213 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec);
1216 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec);
1219 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec);
1221 case tok::kw_double:
1222 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec);
1224 case tok::kw_wchar_t:
1225 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec);
1229 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec);
1231 case tok::kw__Decimal32:
1232 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec);
1234 case tok::kw__Decimal64:
1235 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec);
1237 case tok::kw__Decimal128:
1238 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec);
1243 case tok::kw_struct:
1244 case tok::kw_union: {
1245 tok::TokenKind Kind = Tok.getKind();
1247 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo);
1254 ParseEnumSpecifier(Loc, DS);
1259 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec,
1262 case tok::kw_volatile:
1263 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
1266 case tok::kw_restrict:
1267 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
1271 // GNU typeof support.
1272 case tok::kw_typeof:
1273 ParseTypeofSpecifier(DS);
1276 // C++0x decltype support.
1277 case tok::kw_decltype:
1278 ParseDecltypeSpecifier(DS);
1281 // C++0x auto support.
1283 if (!getLang().CPlusPlus0x)
1286 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec);
1288 case tok::kw___ptr64:
1290 case tok::kw___cdecl:
1291 case tok::kw___stdcall:
1292 case tok::kw___fastcall:
1293 DS.AddAttributes(ParseMicrosoftTypeAttributes());
1297 // Not a type-specifier; do nothing.
1301 // If the specifier combination wasn't legal, issue a diagnostic.
1303 assert(PrevSpec && "Method did not return previous specifier!");
1304 // Pick between error or extwarn.
1305 unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
1306 : diag::ext_duplicate_declspec;
1307 Diag(Tok, DiagID) << PrevSpec;
1309 DS.SetRangeEnd(Tok.getLocation());
1310 ConsumeToken(); // whatever we parsed above.
1314 /// ParseStructDeclaration - Parse a struct declaration without the terminating
1317 /// struct-declaration:
1318 /// specifier-qualifier-list struct-declarator-list
1319 /// [GNU] __extension__ struct-declaration
1320 /// [GNU] specifier-qualifier-list
1321 /// struct-declarator-list:
1322 /// struct-declarator
1323 /// struct-declarator-list ',' struct-declarator
1324 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
1325 /// struct-declarator:
1327 /// [GNU] declarator attributes[opt]
1328 /// declarator[opt] ':' constant-expression
1329 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
1332 ParseStructDeclaration(DeclSpec &DS,
1333 llvm::SmallVectorImpl<FieldDeclarator> &Fields) {
1334 if (Tok.is(tok::kw___extension__)) {
1335 // __extension__ silences extension warnings in the subexpression.
1336 ExtensionRAIIObject O(Diags); // Use RAII to do this.
1338 return ParseStructDeclaration(DS, Fields);
1341 // Parse the common specifier-qualifiers-list piece.
1342 SourceLocation DSStart = Tok.getLocation();
1343 ParseSpecifierQualifierList(DS);
1345 // If there are no declarators, this is a free-standing declaration
1346 // specifier. Let the actions module cope with it.
1347 if (Tok.is(tok::semi)) {
1348 Actions.ParsedFreeStandingDeclSpec(CurScope, DS);
1352 // Read struct-declarators until we find the semicolon.
1353 Fields.push_back(FieldDeclarator(DS));
1355 FieldDeclarator &DeclaratorInfo = Fields.back();
1357 /// struct-declarator: declarator
1358 /// struct-declarator: declarator[opt] ':' constant-expression
1359 if (Tok.isNot(tok::colon))
1360 ParseDeclarator(DeclaratorInfo.D);
1362 if (Tok.is(tok::colon)) {
1364 OwningExprResult Res(ParseConstantExpression());
1365 if (Res.isInvalid())
1366 SkipUntil(tok::semi, true, true);
1368 DeclaratorInfo.BitfieldSize = Res.release();
1371 // If attributes exist after the declarator, parse them.
1372 if (Tok.is(tok::kw___attribute)) {
1374 AttributeList *AttrList = ParseAttributes(&Loc);
1375 DeclaratorInfo.D.AddAttributes(AttrList, Loc);
1378 // If we don't have a comma, it is either the end of the list (a ';')
1379 // or an error, bail out.
1380 if (Tok.isNot(tok::comma))
1383 // Consume the comma.
1386 // Parse the next declarator.
1387 Fields.push_back(FieldDeclarator(DS));
1389 // Attributes are only allowed on the second declarator.
1390 if (Tok.is(tok::kw___attribute)) {
1392 AttributeList *AttrList = ParseAttributes(&Loc);
1393 Fields.back().D.AddAttributes(AttrList, Loc);
1398 /// ParseStructUnionBody
1399 /// struct-contents:
1400 /// struct-declaration-list
1402 /// [GNU] "struct-declaration-list" without terminatoring ';'
1403 /// struct-declaration-list:
1404 /// struct-declaration
1405 /// struct-declaration-list struct-declaration
1406 /// [OBC] '@' 'defs' '(' class-name ')'
1408 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
1409 unsigned TagType, DeclPtrTy TagDecl) {
1410 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions,
1411 PP.getSourceManager(),
1412 "parsing struct/union body");
1414 SourceLocation LBraceLoc = ConsumeBrace();
1416 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
1417 Actions.ActOnTagStartDefinition(CurScope, TagDecl);
1419 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in
1421 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
1422 Diag(Tok, diag::ext_empty_struct_union_enum)
1423 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType);
1425 llvm::SmallVector<DeclPtrTy, 32> FieldDecls;
1426 llvm::SmallVector<FieldDeclarator, 8> FieldDeclarators;
1428 // While we still have something to read, read the declarations in the struct.
1429 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
1430 // Each iteration of this loop reads one struct-declaration.
1432 // Check for extraneous top-level semicolon.
1433 if (Tok.is(tok::semi)) {
1434 Diag(Tok, diag::ext_extra_struct_semi)
1435 << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation()));
1440 // Parse all the comma separated declarators.
1442 FieldDeclarators.clear();
1443 if (!Tok.is(tok::at)) {
1444 ParseStructDeclaration(DS, FieldDeclarators);
1446 // Convert them all to fields.
1447 for (unsigned i = 0, e = FieldDeclarators.size(); i != e; ++i) {
1448 FieldDeclarator &FD = FieldDeclarators[i];
1449 // Install the declarator into the current TagDecl.
1450 DeclPtrTy Field = Actions.ActOnField(CurScope, TagDecl,
1451 DS.getSourceRange().getBegin(),
1452 FD.D, FD.BitfieldSize);
1453 FieldDecls.push_back(Field);
1455 } else { // Handle @defs
1457 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
1458 Diag(Tok, diag::err_unexpected_at);
1459 SkipUntil(tok::semi, true, true);
1463 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen);
1464 if (!Tok.is(tok::identifier)) {
1465 Diag(Tok, diag::err_expected_ident);
1466 SkipUntil(tok::semi, true, true);
1469 llvm::SmallVector<DeclPtrTy, 16> Fields;
1470 Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(),
1471 Tok.getIdentifierInfo(), Fields);
1472 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
1474 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen);
1477 if (Tok.is(tok::semi)) {
1479 } else if (Tok.is(tok::r_brace)) {
1480 Diag(Tok, diag::ext_expected_semi_decl_list);
1483 Diag(Tok, diag::err_expected_semi_decl_list);
1484 // Skip to end of block or statement
1485 SkipUntil(tok::r_brace, true, true);
1489 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc);
1491 AttributeList *AttrList = 0;
1492 // If attributes exist after struct contents, parse them.
1493 if (Tok.is(tok::kw___attribute))
1494 AttrList = ParseAttributes();
1496 Actions.ActOnFields(CurScope,
1497 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(),
1498 LBraceLoc, RBraceLoc,
1501 Actions.ActOnTagFinishDefinition(CurScope, TagDecl);
1505 /// ParseEnumSpecifier
1506 /// enum-specifier: [C99 6.7.2.2]
1507 /// 'enum' identifier[opt] '{' enumerator-list '}'
1508 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
1509 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
1510 /// '}' attributes[opt]
1511 /// 'enum' identifier
1512 /// [GNU] 'enum' attributes[opt] identifier
1514 /// [C++] elaborated-type-specifier:
1515 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
1517 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
1518 AccessSpecifier AS) {
1519 // Parse the tag portion of this.
1521 AttributeList *Attr = 0;
1522 // If attributes exist after tag, parse them.
1523 if (Tok.is(tok::kw___attribute))
1524 Attr = ParseAttributes();
1527 if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS)) {
1528 if (Tok.isNot(tok::identifier)) {
1529 Diag(Tok, diag::err_expected_ident);
1530 if (Tok.isNot(tok::l_brace)) {
1531 // Has no name and is not a definition.
1532 // Skip the rest of this declarator, up until the comma or semicolon.
1533 SkipUntil(tok::comma, true);
1539 // Must have either 'enum name' or 'enum {...}'.
1540 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) {
1541 Diag(Tok, diag::err_expected_ident_lbrace);
1543 // Skip the rest of this declarator, up until the comma or semicolon.
1544 SkipUntil(tok::comma, true);
1548 // If an identifier is present, consume and remember it.
1549 IdentifierInfo *Name = 0;
1550 SourceLocation NameLoc;
1551 if (Tok.is(tok::identifier)) {
1552 Name = Tok.getIdentifierInfo();
1553 NameLoc = ConsumeToken();
1556 // There are three options here. If we have 'enum foo;', then this is a
1557 // forward declaration. If we have 'enum foo {...' then this is a
1558 // definition. Otherwise we have something like 'enum foo xyz', a reference.
1560 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
1561 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
1562 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
1565 if (Tok.is(tok::l_brace))
1566 TK = Action::TK_Definition;
1567 else if (Tok.is(tok::semi))
1568 TK = Action::TK_Declaration;
1570 TK = Action::TK_Reference;
1572 DeclPtrTy TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TK,
1573 StartLoc, SS, Name, NameLoc, Attr, AS,
1576 if (Tok.is(tok::l_brace))
1577 ParseEnumBody(StartLoc, TagDecl);
1579 // TODO: semantic analysis on the declspec for enums.
1580 const char *PrevSpec = 0;
1581 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc, PrevSpec,
1582 TagDecl.getAs<void>(), Owned))
1583 Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
1586 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
1587 /// enumerator-list:
1589 /// enumerator-list ',' enumerator
1591 /// enumeration-constant
1592 /// enumeration-constant '=' constant-expression
1593 /// enumeration-constant:
1596 void Parser::ParseEnumBody(SourceLocation StartLoc, DeclPtrTy EnumDecl) {
1597 // Enter the scope of the enum body and start the definition.
1598 ParseScope EnumScope(this, Scope::DeclScope);
1599 Actions.ActOnTagStartDefinition(CurScope, EnumDecl);
1601 SourceLocation LBraceLoc = ConsumeBrace();
1603 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
1604 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
1605 Diag(Tok, diag::ext_empty_struct_union_enum) << "enum";
1607 llvm::SmallVector<DeclPtrTy, 32> EnumConstantDecls;
1609 DeclPtrTy LastEnumConstDecl;
1611 // Parse the enumerator-list.
1612 while (Tok.is(tok::identifier)) {
1613 IdentifierInfo *Ident = Tok.getIdentifierInfo();
1614 SourceLocation IdentLoc = ConsumeToken();
1616 SourceLocation EqualLoc;
1617 OwningExprResult AssignedVal(Actions);
1618 if (Tok.is(tok::equal)) {
1619 EqualLoc = ConsumeToken();
1620 AssignedVal = ParseConstantExpression();
1621 if (AssignedVal.isInvalid())
1622 SkipUntil(tok::comma, tok::r_brace, true, true);
1625 // Install the enumerator constant into EnumDecl.
1626 DeclPtrTy EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl,
1630 AssignedVal.release());
1631 EnumConstantDecls.push_back(EnumConstDecl);
1632 LastEnumConstDecl = EnumConstDecl;
1634 if (Tok.isNot(tok::comma))
1636 SourceLocation CommaLoc = ConsumeToken();
1638 if (Tok.isNot(tok::identifier) &&
1639 !(getLang().C99 || getLang().CPlusPlus0x))
1640 Diag(CommaLoc, diag::ext_enumerator_list_comma)
1641 << getLang().CPlusPlus
1642 << CodeModificationHint::CreateRemoval((SourceRange(CommaLoc)));
1646 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc);
1648 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl,
1649 EnumConstantDecls.data(), EnumConstantDecls.size());
1651 Action::AttrTy *AttrList = 0;
1652 // If attributes exist after the identifier list, parse them.
1653 if (Tok.is(tok::kw___attribute))
1654 AttrList = ParseAttributes(); // FIXME: where do they do?
1657 Actions.ActOnTagFinishDefinition(CurScope, EnumDecl);
1660 /// isTypeSpecifierQualifier - Return true if the current token could be the
1661 /// start of a type-qualifier-list.
1662 bool Parser::isTypeQualifier() const {
1663 switch (Tok.getKind()) {
1664 default: return false;
1667 case tok::kw_volatile:
1668 case tok::kw_restrict:
1673 /// isTypeSpecifierQualifier - Return true if the current token could be the
1674 /// start of a specifier-qualifier-list.
1675 bool Parser::isTypeSpecifierQualifier() {
1676 switch (Tok.getKind()) {
1677 default: return false;
1679 case tok::identifier: // foo::bar
1680 case tok::kw_typename: // typename T::type
1681 // Annotate typenames and C++ scope specifiers. If we get one, just
1682 // recurse to handle whatever we get.
1683 if (TryAnnotateTypeOrScopeToken())
1684 return isTypeSpecifierQualifier();
1685 // Otherwise, not a type specifier.
1688 case tok::coloncolon: // ::foo::bar
1689 if (NextToken().is(tok::kw_new) || // ::new
1690 NextToken().is(tok::kw_delete)) // ::delete
1693 // Annotate typenames and C++ scope specifiers. If we get one, just
1694 // recurse to handle whatever we get.
1695 if (TryAnnotateTypeOrScopeToken())
1696 return isTypeSpecifierQualifier();
1697 // Otherwise, not a type specifier.
1700 // GNU attributes support.
1701 case tok::kw___attribute:
1702 // GNU typeof support.
1703 case tok::kw_typeof:
1708 case tok::kw_signed:
1709 case tok::kw_unsigned:
1710 case tok::kw__Complex:
1711 case tok::kw__Imaginary:
1714 case tok::kw_wchar_t:
1717 case tok::kw_double:
1720 case tok::kw__Decimal32:
1721 case tok::kw__Decimal64:
1722 case tok::kw__Decimal128:
1724 // struct-or-union-specifier (C99) or class-specifier (C++)
1726 case tok::kw_struct:
1733 case tok::kw_volatile:
1734 case tok::kw_restrict:
1737 case tok::annot_typename:
1740 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
1742 return getLang().ObjC1;
1744 case tok::kw___cdecl:
1745 case tok::kw___stdcall:
1746 case tok::kw___fastcall:
1748 case tok::kw___ptr64:
1753 /// isDeclarationSpecifier() - Return true if the current token is part of a
1754 /// declaration specifier.
1755 bool Parser::isDeclarationSpecifier() {
1756 switch (Tok.getKind()) {
1757 default: return false;
1759 case tok::identifier: // foo::bar
1760 // Unfortunate hack to support "Class.factoryMethod" notation.
1761 if (getLang().ObjC1 && NextToken().is(tok::period))
1765 case tok::kw_typename: // typename T::type
1766 // Annotate typenames and C++ scope specifiers. If we get one, just
1767 // recurse to handle whatever we get.
1768 if (TryAnnotateTypeOrScopeToken())
1769 return isDeclarationSpecifier();
1770 // Otherwise, not a declaration specifier.
1772 case tok::coloncolon: // ::foo::bar
1773 if (NextToken().is(tok::kw_new) || // ::new
1774 NextToken().is(tok::kw_delete)) // ::delete
1777 // Annotate typenames and C++ scope specifiers. If we get one, just
1778 // recurse to handle whatever we get.
1779 if (TryAnnotateTypeOrScopeToken())
1780 return isDeclarationSpecifier();
1781 // Otherwise, not a declaration specifier.
1784 // storage-class-specifier
1785 case tok::kw_typedef:
1786 case tok::kw_extern:
1787 case tok::kw___private_extern__:
1788 case tok::kw_static:
1790 case tok::kw_register:
1791 case tok::kw___thread:
1796 case tok::kw_signed:
1797 case tok::kw_unsigned:
1798 case tok::kw__Complex:
1799 case tok::kw__Imaginary:
1802 case tok::kw_wchar_t:
1805 case tok::kw_double:
1808 case tok::kw__Decimal32:
1809 case tok::kw__Decimal64:
1810 case tok::kw__Decimal128:
1812 // struct-or-union-specifier (C99) or class-specifier (C++)
1814 case tok::kw_struct:
1821 case tok::kw_volatile:
1822 case tok::kw_restrict:
1824 // function-specifier
1825 case tok::kw_inline:
1826 case tok::kw_virtual:
1827 case tok::kw_explicit:
1830 case tok::annot_typename:
1832 // GNU typeof support.
1833 case tok::kw_typeof:
1836 case tok::kw___attribute:
1839 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
1841 return getLang().ObjC1;
1843 case tok::kw___declspec:
1844 case tok::kw___cdecl:
1845 case tok::kw___stdcall:
1846 case tok::kw___fastcall:
1848 case tok::kw___ptr64:
1849 case tok::kw___forceinline:
1855 /// ParseTypeQualifierListOpt
1856 /// type-qualifier-list: [C99 6.7.5]
1858 /// [GNU] attributes [ only if AttributesAllowed=true ]
1859 /// type-qualifier-list type-qualifier
1860 /// [GNU] type-qualifier-list attributes [ only if AttributesAllowed=true ]
1862 void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, bool AttributesAllowed) {
1864 int isInvalid = false;
1865 const char *PrevSpec = 0;
1866 SourceLocation Loc = Tok.getLocation();
1868 switch (Tok.getKind()) {
1870 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec,
1873 case tok::kw_volatile:
1874 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
1877 case tok::kw_restrict:
1878 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
1882 case tok::kw___ptr64:
1883 case tok::kw___cdecl:
1884 case tok::kw___stdcall:
1885 case tok::kw___fastcall:
1886 if (AttributesAllowed) {
1887 DS.AddAttributes(ParseMicrosoftTypeAttributes());
1890 goto DoneWithTypeQuals;
1891 case tok::kw___attribute:
1892 if (AttributesAllowed) {
1893 DS.AddAttributes(ParseAttributes());
1894 continue; // do *not* consume the next token!
1896 // otherwise, FALL THROUGH!
1899 // If this is not a type-qualifier token, we're done reading type
1900 // qualifiers. First verify that DeclSpec's are consistent.
1901 DS.Finish(Diags, PP);
1905 // If the specifier combination wasn't legal, issue a diagnostic.
1907 assert(PrevSpec && "Method did not return previous specifier!");
1908 // Pick between error or extwarn.
1909 unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
1910 : diag::ext_duplicate_declspec;
1911 Diag(Tok, DiagID) << PrevSpec;
1918 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
1920 void Parser::ParseDeclarator(Declarator &D) {
1921 /// This implements the 'declarator' production in the C grammar, then checks
1922 /// for well-formedness and issues diagnostics.
1923 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
1926 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
1927 /// is parsed by the function passed to it. Pass null, and the direct-declarator
1928 /// isn't parsed at all, making this function effectively parse the C++
1929 /// ptr-operator production.
1931 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
1932 /// [C] pointer[opt] direct-declarator
1933 /// [C++] direct-declarator
1934 /// [C++] ptr-operator declarator
1936 /// pointer: [C99 6.7.5]
1937 /// '*' type-qualifier-list[opt]
1938 /// '*' type-qualifier-list[opt] pointer
1941 /// '*' cv-qualifier-seq[opt]
1944 /// [GNU] '&' restrict[opt] attributes[opt]
1945 /// [GNU?] '&&' restrict[opt] attributes[opt]
1946 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
1947 void Parser::ParseDeclaratorInternal(Declarator &D,
1948 DirectDeclParseFunction DirectDeclParser) {
1950 // C++ member pointers start with a '::' or a nested-name.
1951 // Member pointers get special handling, since there's no place for the
1952 // scope spec in the generic path below.
1953 if (getLang().CPlusPlus &&
1954 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) ||
1955 Tok.is(tok::annot_cxxscope))) {
1957 if (ParseOptionalCXXScopeSpecifier(SS)) {
1958 if(Tok.isNot(tok::star)) {
1959 // The scope spec really belongs to the direct-declarator.
1960 D.getCXXScopeSpec() = SS;
1961 if (DirectDeclParser)
1962 (this->*DirectDeclParser)(D);
1966 SourceLocation Loc = ConsumeToken();
1969 ParseTypeQualifierListOpt(DS);
1970 D.ExtendWithDeclSpec(DS);
1972 // Recurse to parse whatever is left.
1973 ParseDeclaratorInternal(D, DirectDeclParser);
1975 // Sema will have to catch (syntactically invalid) pointers into global
1976 // scope. It has to catch pointers into namespace scope anyway.
1977 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
1978 Loc, DS.TakeAttributes()),
1979 /* Don't replace range end. */SourceLocation());
1984 tok::TokenKind Kind = Tok.getKind();
1985 // Not a pointer, C++ reference, or block.
1986 if (Kind != tok::star && Kind != tok::caret &&
1987 (Kind != tok::amp || !getLang().CPlusPlus) &&
1988 // We parse rvalue refs in C++03, because otherwise the errors are scary.
1989 (Kind != tok::ampamp || !getLang().CPlusPlus)) {
1990 if (DirectDeclParser)
1991 (this->*DirectDeclParser)(D);
1995 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
1996 // '&&' -> rvalue reference
1997 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
2000 if (Kind == tok::star || Kind == tok::caret) {
2004 ParseTypeQualifierListOpt(DS);
2005 D.ExtendWithDeclSpec(DS);
2007 // Recursively parse the declarator.
2008 ParseDeclaratorInternal(D, DirectDeclParser);
2009 if (Kind == tok::star)
2010 // Remember that we parsed a pointer type, and remember the type-quals.
2011 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
2012 DS.TakeAttributes()),
2015 // Remember that we parsed a Block type, and remember the type-quals.
2016 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
2017 Loc, DS.TakeAttributes()),
2023 // Complain about rvalue references in C++03, but then go on and build
2025 if (Kind == tok::ampamp && !getLang().CPlusPlus0x)
2026 Diag(Loc, diag::err_rvalue_reference);
2028 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
2029 // cv-qualifiers are introduced through the use of a typedef or of a
2030 // template type argument, in which case the cv-qualifiers are ignored.
2032 // [GNU] Retricted references are allowed.
2033 // [GNU] Attributes on references are allowed.
2034 ParseTypeQualifierListOpt(DS);
2035 D.ExtendWithDeclSpec(DS);
2037 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
2038 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
2039 Diag(DS.getConstSpecLoc(),
2040 diag::err_invalid_reference_qualifier_application) << "const";
2041 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
2042 Diag(DS.getVolatileSpecLoc(),
2043 diag::err_invalid_reference_qualifier_application) << "volatile";
2046 // Recursively parse the declarator.
2047 ParseDeclaratorInternal(D, DirectDeclParser);
2049 if (D.getNumTypeObjects() > 0) {
2050 // C++ [dcl.ref]p4: There shall be no references to references.
2051 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
2052 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
2053 if (const IdentifierInfo *II = D.getIdentifier())
2054 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
2057 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
2060 // Once we've complained about the reference-to-reference, we
2061 // can go ahead and build the (technically ill-formed)
2062 // declarator: reference collapsing will take care of it.
2066 // Remember that we parsed a reference type. It doesn't have type-quals.
2067 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
2068 DS.TakeAttributes(),
2074 /// ParseDirectDeclarator
2075 /// direct-declarator: [C99 6.7.5]
2076 /// [C99] identifier
2077 /// '(' declarator ')'
2078 /// [GNU] '(' attributes declarator ')'
2079 /// [C90] direct-declarator '[' constant-expression[opt] ']'
2080 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
2081 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
2082 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
2083 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
2084 /// direct-declarator '(' parameter-type-list ')'
2085 /// direct-declarator '(' identifier-list[opt] ')'
2086 /// [GNU] direct-declarator '(' parameter-forward-declarations
2087 /// parameter-type-list[opt] ')'
2088 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
2089 /// cv-qualifier-seq[opt] exception-specification[opt]
2090 /// [C++] declarator-id
2092 /// declarator-id: [C++ 8]
2094 /// '::'[opt] nested-name-specifier[opt] type-name
2096 /// id-expression: [C++ 5.1]
2098 /// qualified-id [TODO]
2100 /// unqualified-id: [C++ 5.1]
2102 /// operator-function-id
2103 /// conversion-function-id [TODO]
2107 void Parser::ParseDirectDeclarator(Declarator &D) {
2108 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
2110 if (getLang().CPlusPlus) {
2111 if (D.mayHaveIdentifier()) {
2112 // ParseDeclaratorInternal might already have parsed the scope.
2113 bool afterCXXScope = D.getCXXScopeSpec().isSet() ||
2114 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec());
2115 if (afterCXXScope) {
2116 // Change the declaration context for name lookup, until this function
2117 // is exited (and the declarator has been parsed).
2118 DeclScopeObj.EnterDeclaratorScope();
2121 if (Tok.is(tok::identifier)) {
2122 assert(Tok.getIdentifierInfo() && "Not an identifier?");
2124 // If this identifier is the name of the current class, it's a
2125 // constructor name.
2126 if (!D.getDeclSpec().hasTypeSpecifier() &&
2127 Actions.isCurrentClassName(*Tok.getIdentifierInfo(),CurScope)) {
2128 D.setConstructor(Actions.getTypeName(*Tok.getIdentifierInfo(),
2129 Tok.getLocation(), CurScope),
2131 // This is a normal identifier.
2133 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
2135 goto PastIdentifier;
2136 } else if (Tok.is(tok::annot_template_id)) {
2137 TemplateIdAnnotation *TemplateId
2138 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
2140 // FIXME: Could this template-id name a constructor?
2142 // FIXME: This is an egregious hack, where we silently ignore
2143 // the specialization (which should be a function template
2144 // specialization name) and use the name instead. This hack
2145 // will go away when we have support for function
2147 D.SetIdentifier(TemplateId->Name, Tok.getLocation());
2148 TemplateId->Destroy();
2150 goto PastIdentifier;
2151 } else if (Tok.is(tok::kw_operator)) {
2152 SourceLocation OperatorLoc = Tok.getLocation();
2153 SourceLocation EndLoc;
2155 // First try the name of an overloaded operator
2156 if (OverloadedOperatorKind Op = TryParseOperatorFunctionId(&EndLoc)) {
2157 D.setOverloadedOperator(Op, OperatorLoc, EndLoc);
2159 // This must be a conversion function (C++ [class.conv.fct]).
2160 if (TypeTy *ConvType = ParseConversionFunctionId(&EndLoc))
2161 D.setConversionFunction(ConvType, OperatorLoc, EndLoc);
2163 D.SetIdentifier(0, Tok.getLocation());
2166 goto PastIdentifier;
2167 } else if (Tok.is(tok::tilde)) {
2168 // This should be a C++ destructor.
2169 SourceLocation TildeLoc = ConsumeToken();
2170 if (Tok.is(tok::identifier)) {
2171 // FIXME: Inaccurate.
2172 SourceLocation NameLoc = Tok.getLocation();
2173 SourceLocation EndLoc;
2174 TypeResult Type = ParseClassName(EndLoc);
2175 if (Type.isInvalid())
2176 D.SetIdentifier(0, TildeLoc);
2178 D.setDestructor(Type.get(), TildeLoc, NameLoc);
2180 Diag(Tok, diag::err_expected_class_name);
2181 D.SetIdentifier(0, TildeLoc);
2183 goto PastIdentifier;
2186 // If we reached this point, token is not identifier and not '~'.
2188 if (afterCXXScope) {
2189 Diag(Tok, diag::err_expected_unqualified_id);
2190 D.SetIdentifier(0, Tok.getLocation());
2191 D.setInvalidType(true);
2192 goto PastIdentifier;
2197 // If we reached this point, we are either in C/ObjC or the token didn't
2198 // satisfy any of the C++-specific checks.
2199 if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
2200 assert(!getLang().CPlusPlus &&
2201 "There's a C++-specific check for tok::identifier above");
2202 assert(Tok.getIdentifierInfo() && "Not an identifier?");
2203 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
2205 } else if (Tok.is(tok::l_paren)) {
2206 // direct-declarator: '(' declarator ')'
2207 // direct-declarator: '(' attributes declarator ')'
2208 // Example: 'char (*X)' or 'int (*XX)(void)'
2209 ParseParenDeclarator(D);
2210 } else if (D.mayOmitIdentifier()) {
2211 // This could be something simple like "int" (in which case the declarator
2212 // portion is empty), if an abstract-declarator is allowed.
2213 D.SetIdentifier(0, Tok.getLocation());
2215 if (D.getContext() == Declarator::MemberContext)
2216 Diag(Tok, diag::err_expected_member_name_or_semi)
2217 << D.getDeclSpec().getSourceRange();
2218 else if (getLang().CPlusPlus)
2219 Diag(Tok, diag::err_expected_unqualified_id);
2221 Diag(Tok, diag::err_expected_ident_lparen);
2222 D.SetIdentifier(0, Tok.getLocation());
2223 D.setInvalidType(true);
2227 assert(D.isPastIdentifier() &&
2228 "Haven't past the location of the identifier yet?");
2231 if (Tok.is(tok::l_paren)) {
2232 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
2233 // In such a case, check if we actually have a function declarator; if it
2234 // is not, the declarator has been fully parsed.
2235 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
2236 // When not in file scope, warn for ambiguous function declarators, just
2237 // in case the author intended it as a variable definition.
2238 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext;
2239 if (!isCXXFunctionDeclarator(warnIfAmbiguous))
2242 ParseFunctionDeclarator(ConsumeParen(), D);
2243 } else if (Tok.is(tok::l_square)) {
2244 ParseBracketDeclarator(D);
2251 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
2252 /// only called before the identifier, so these are most likely just grouping
2253 /// parens for precedence. If we find that these are actually function
2254 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
2256 /// direct-declarator:
2257 /// '(' declarator ')'
2258 /// [GNU] '(' attributes declarator ')'
2259 /// direct-declarator '(' parameter-type-list ')'
2260 /// direct-declarator '(' identifier-list[opt] ')'
2261 /// [GNU] direct-declarator '(' parameter-forward-declarations
2262 /// parameter-type-list[opt] ')'
2264 void Parser::ParseParenDeclarator(Declarator &D) {
2265 SourceLocation StartLoc = ConsumeParen();
2266 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
2268 // Eat any attributes before we look at whether this is a grouping or function
2269 // declarator paren. If this is a grouping paren, the attribute applies to
2270 // the type being built up, for example:
2271 // int (__attribute__(()) *x)(long y)
2272 // If this ends up not being a grouping paren, the attribute applies to the
2273 // first argument, for example:
2274 // int (__attribute__(()) int x)
2275 // In either case, we need to eat any attributes to be able to determine what
2276 // sort of paren this is.
2278 AttributeList *AttrList = 0;
2279 bool RequiresArg = false;
2280 if (Tok.is(tok::kw___attribute)) {
2281 AttrList = ParseAttributes();
2283 // We require that the argument list (if this is a non-grouping paren) be
2284 // present even if the attribute list was empty.
2287 // Eat any Microsoft extensions.
2288 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) ||
2289 Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___w64) ||
2290 Tok.is(tok::kw___ptr64)) {
2291 AttrList = ParseMicrosoftTypeAttributes(AttrList);
2294 // If we haven't past the identifier yet (or where the identifier would be
2295 // stored, if this is an abstract declarator), then this is probably just
2296 // grouping parens. However, if this could be an abstract-declarator, then
2297 // this could also be the start of function arguments (consider 'void()').
2300 if (!D.mayOmitIdentifier()) {
2301 // If this can't be an abstract-declarator, this *must* be a grouping
2302 // paren, because we haven't seen the identifier yet.
2304 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
2305 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...)
2306 isDeclarationSpecifier()) { // 'int(int)' is a function.
2307 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
2308 // considered to be a type, not a K&R identifier-list.
2311 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
2315 // If this is a grouping paren, handle:
2316 // direct-declarator: '(' declarator ')'
2317 // direct-declarator: '(' attributes declarator ')'
2319 bool hadGroupingParens = D.hasGroupingParens();
2320 D.setGroupingParens(true);
2322 D.AddAttributes(AttrList, SourceLocation());
2324 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
2326 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc);
2328 D.setGroupingParens(hadGroupingParens);
2333 // Okay, if this wasn't a grouping paren, it must be the start of a function
2334 // argument list. Recognize that this declarator will never have an
2335 // identifier (and remember where it would have been), then call into
2336 // ParseFunctionDeclarator to handle of argument list.
2337 D.SetIdentifier(0, Tok.getLocation());
2339 ParseFunctionDeclarator(StartLoc, D, AttrList, RequiresArg);
2342 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
2343 /// declarator D up to a paren, which indicates that we are parsing function
2346 /// If AttrList is non-null, then the caller parsed those arguments immediately
2347 /// after the open paren - they should be considered to be the first argument of
2348 /// a parameter. If RequiresArg is true, then the first argument of the
2349 /// function is required to be present and required to not be an identifier
2352 /// This method also handles this portion of the grammar:
2353 /// parameter-type-list: [C99 6.7.5]
2355 /// parameter-list ',' '...'
2357 /// parameter-list: [C99 6.7.5]
2358 /// parameter-declaration
2359 /// parameter-list ',' parameter-declaration
2361 /// parameter-declaration: [C99 6.7.5]
2362 /// declaration-specifiers declarator
2363 /// [C++] declaration-specifiers declarator '=' assignment-expression
2364 /// [GNU] declaration-specifiers declarator attributes
2365 /// declaration-specifiers abstract-declarator[opt]
2366 /// [C++] declaration-specifiers abstract-declarator[opt]
2367 /// '=' assignment-expression
2368 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
2370 /// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]"
2371 /// and "exception-specification[opt]".
2373 void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D,
2374 AttributeList *AttrList,
2376 // lparen is already consumed!
2377 assert(D.isPastIdentifier() && "Should not call before identifier!");
2379 // This parameter list may be empty.
2380 if (Tok.is(tok::r_paren)) {
2382 Diag(Tok, diag::err_argument_required_after_attribute);
2386 SourceLocation Loc = ConsumeParen(); // Eat the closing ')'.
2388 // cv-qualifier-seq[opt].
2390 bool hasExceptionSpec = false;
2391 SourceLocation ThrowLoc;
2392 bool hasAnyExceptionSpec = false;
2393 llvm::SmallVector<TypeTy*, 2> Exceptions;
2394 llvm::SmallVector<SourceRange, 2> ExceptionRanges;
2395 if (getLang().CPlusPlus) {
2396 ParseTypeQualifierListOpt(DS, false /*no attributes*/);
2397 if (!DS.getSourceRange().getEnd().isInvalid())
2398 Loc = DS.getSourceRange().getEnd();
2400 // Parse exception-specification[opt].
2401 if (Tok.is(tok::kw_throw)) {
2402 hasExceptionSpec = true;
2403 ThrowLoc = Tok.getLocation();
2404 ParseExceptionSpecification(Loc, Exceptions, ExceptionRanges,
2405 hasAnyExceptionSpec);
2406 assert(Exceptions.size() == ExceptionRanges.size() &&
2407 "Produced different number of exception types and ranges.");
2411 // Remember that we parsed a function type, and remember the attributes.
2412 // int() -> no prototype, no '...'.
2413 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus,
2417 DS.getTypeQualifiers(),
2418 hasExceptionSpec, ThrowLoc,
2419 hasAnyExceptionSpec,
2421 ExceptionRanges.data(),
2428 // Alternatively, this parameter list may be an identifier list form for a
2429 // K&R-style function: void foo(a,b,c)
2430 if (!getLang().CPlusPlus && Tok.is(tok::identifier)) {
2431 if (!TryAnnotateTypeOrScopeToken()) {
2432 // K&R identifier lists can't have typedefs as identifiers, per
2435 Diag(Tok, diag::err_argument_required_after_attribute);
2438 // Identifier list. Note that '(' identifier-list ')' is only allowed for
2439 // normal declarators, not for abstract-declarators.
2440 return ParseFunctionDeclaratorIdentifierList(LParenLoc, D);
2444 // Finally, a normal, non-empty parameter type list.
2446 // Build up an array of information about the parsed arguments.
2447 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
2449 // Enter function-declaration scope, limiting any declarators to the
2450 // function prototype scope, including parameter declarators.
2451 ParseScope PrototypeScope(this,
2452 Scope::FunctionPrototypeScope|Scope::DeclScope);
2454 bool IsVariadic = false;
2455 SourceLocation EllipsisLoc;
2457 if (Tok.is(tok::ellipsis)) {
2459 EllipsisLoc = ConsumeToken(); // Consume the ellipsis.
2463 SourceLocation DSStart = Tok.getLocation();
2465 // Parse the declaration-specifiers.
2468 // If the caller parsed attributes for the first argument, add them now.
2470 DS.AddAttributes(AttrList);
2471 AttrList = 0; // Only apply the attributes to the first parameter.
2473 ParseDeclarationSpecifiers(DS);
2475 // Parse the declarator. This is "PrototypeContext", because we must
2476 // accept either 'declarator' or 'abstract-declarator' here.
2477 Declarator ParmDecl(DS, Declarator::PrototypeContext);
2478 ParseDeclarator(ParmDecl);
2480 // Parse GNU attributes, if present.
2481 if (Tok.is(tok::kw___attribute)) {
2483 AttributeList *AttrList = ParseAttributes(&Loc);
2484 ParmDecl.AddAttributes(AttrList, Loc);
2487 // Remember this parsed parameter in ParamInfo.
2488 IdentifierInfo *ParmII = ParmDecl.getIdentifier();
2490 // DefArgToks is used when the parsing of default arguments needs
2492 CachedTokens *DefArgToks = 0;
2494 // If no parameter was specified, verify that *something* was specified,
2495 // otherwise we have a missing type and identifier.
2496 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 &&
2497 ParmDecl.getNumTypeObjects() == 0) {
2498 // Completely missing, emit error.
2499 Diag(DSStart, diag::err_missing_param);
2501 // Otherwise, we have something. Add it and let semantic analysis try
2502 // to grok it and add the result to the ParamInfo we are building.
2504 // Inform the actions module about the parameter declarator, so it gets
2505 // added to the current scope.
2506 DeclPtrTy Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl);
2508 // Parse the default argument, if any. We parse the default
2509 // arguments in all dialects; the semantic analysis in
2510 // ActOnParamDefaultArgument will reject the default argument in
2512 if (Tok.is(tok::equal)) {
2513 SourceLocation EqualLoc = Tok.getLocation();
2515 // Parse the default argument
2516 if (D.getContext() == Declarator::MemberContext) {
2517 // If we're inside a class definition, cache the tokens
2518 // corresponding to the default argument. We'll actually parse
2519 // them when we see the end of the class definition.
2520 // FIXME: Templates will require something similar.
2521 // FIXME: Can we use a smart pointer for Toks?
2522 DefArgToks = new CachedTokens;
2524 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks,
2525 tok::semi, false)) {
2528 Actions.ActOnParamDefaultArgumentError(Param);
2530 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
2531 (*DefArgToks)[1].getLocation());
2536 OwningExprResult DefArgResult(ParseAssignmentExpression());
2537 if (DefArgResult.isInvalid()) {
2538 Actions.ActOnParamDefaultArgumentError(Param);
2539 SkipUntil(tok::comma, tok::r_paren, true, true);
2541 // Inform the actions module about the default argument
2542 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
2543 move(DefArgResult));
2548 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
2549 ParmDecl.getIdentifierLoc(), Param,
2553 // If the next token is a comma, consume it and keep reading arguments.
2554 if (Tok.isNot(tok::comma)) break;
2556 // Consume the comma.
2560 // Leave prototype scope.
2561 PrototypeScope.Exit();
2563 // If we have the closing ')', eat it.
2564 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
2567 bool hasExceptionSpec = false;
2568 SourceLocation ThrowLoc;
2569 bool hasAnyExceptionSpec = false;
2570 llvm::SmallVector<TypeTy*, 2> Exceptions;
2571 llvm::SmallVector<SourceRange, 2> ExceptionRanges;
2572 if (getLang().CPlusPlus) {
2573 // Parse cv-qualifier-seq[opt].
2574 ParseTypeQualifierListOpt(DS, false /*no attributes*/);
2575 if (!DS.getSourceRange().getEnd().isInvalid())
2576 Loc = DS.getSourceRange().getEnd();
2578 // Parse exception-specification[opt].
2579 if (Tok.is(tok::kw_throw)) {
2580 hasExceptionSpec = true;
2581 ThrowLoc = Tok.getLocation();
2582 ParseExceptionSpecification(Loc, Exceptions, ExceptionRanges,
2583 hasAnyExceptionSpec);
2584 assert(Exceptions.size() == ExceptionRanges.size() &&
2585 "Produced different number of exception types and ranges.");
2589 // Remember that we parsed a function type, and remember the attributes.
2590 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic,
2592 ParamInfo.data(), ParamInfo.size(),
2593 DS.getTypeQualifiers(),
2594 hasExceptionSpec, ThrowLoc,
2595 hasAnyExceptionSpec,
2597 ExceptionRanges.data(),
2598 Exceptions.size(), LParenLoc, D),
2602 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
2603 /// we found a K&R-style identifier list instead of a type argument list. The
2604 /// current token is known to be the first identifier in the list.
2606 /// identifier-list: [C99 6.7.5]
2608 /// identifier-list ',' identifier
2610 void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc,
2612 // Build up an array of information about the parsed arguments.
2613 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
2614 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
2616 // If there was no identifier specified for the declarator, either we are in
2617 // an abstract-declarator, or we are in a parameter declarator which was found
2618 // to be abstract. In abstract-declarators, identifier lists are not valid:
2620 if (!D.getIdentifier())
2621 Diag(Tok, diag::ext_ident_list_in_param);
2623 // Tok is known to be the first identifier in the list. Remember this
2624 // identifier in ParamInfo.
2625 ParamsSoFar.insert(Tok.getIdentifierInfo());
2626 ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(),
2630 ConsumeToken(); // eat the first identifier.
2632 while (Tok.is(tok::comma)) {
2636 // If this isn't an identifier, report the error and skip until ')'.
2637 if (Tok.isNot(tok::identifier)) {
2638 Diag(Tok, diag::err_expected_ident);
2639 SkipUntil(tok::r_paren);
2643 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
2645 // Reject 'typedef int y; int test(x, y)', but continue parsing.
2646 if (Actions.getTypeName(*ParmII, Tok.getLocation(), CurScope))
2647 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
2649 // Verify that the argument identifier has not already been mentioned.
2650 if (!ParamsSoFar.insert(ParmII)) {
2651 Diag(Tok, diag::err_param_redefinition) << ParmII;
2653 // Remember this identifier in ParamInfo.
2654 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
2659 // Eat the identifier.
2663 // If we have the closing ')', eat it and we're done.
2664 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
2666 // Remember that we parsed a function type, and remember the attributes. This
2667 // function type is always a K&R style function type, which is not varargs and
2668 // has no prototype.
2669 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false,
2671 &ParamInfo[0], ParamInfo.size(),
2674 SourceLocation(), false, 0, 0, 0,
2679 /// [C90] direct-declarator '[' constant-expression[opt] ']'
2680 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
2681 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
2682 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
2683 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
2684 void Parser::ParseBracketDeclarator(Declarator &D) {
2685 SourceLocation StartLoc = ConsumeBracket();
2687 // C array syntax has many features, but by-far the most common is [] and [4].
2688 // This code does a fast path to handle some of the most obvious cases.
2689 if (Tok.getKind() == tok::r_square) {
2690 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc);
2691 // Remember that we parsed the empty array type.
2692 OwningExprResult NumElements(Actions);
2693 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, StartLoc),
2696 } else if (Tok.getKind() == tok::numeric_constant &&
2697 GetLookAheadToken(1).is(tok::r_square)) {
2698 // [4] is very common. Parse the numeric constant expression.
2699 OwningExprResult ExprRes(Actions.ActOnNumericConstant(Tok));
2702 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc);
2704 // If there was an error parsing the assignment-expression, recover.
2705 if (ExprRes.isInvalid())
2706 ExprRes.release(); // Deallocate expr, just use [].
2708 // Remember that we parsed a array type, and remember its features.
2709 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0,
2710 ExprRes.release(), StartLoc),
2715 // If valid, this location is the position where we read the 'static' keyword.
2716 SourceLocation StaticLoc;
2717 if (Tok.is(tok::kw_static))
2718 StaticLoc = ConsumeToken();
2720 // If there is a type-qualifier-list, read it now.
2721 // Type qualifiers in an array subscript are a C99 feature.
2723 ParseTypeQualifierListOpt(DS, false /*no attributes*/);
2725 // If we haven't already read 'static', check to see if there is one after the
2726 // type-qualifier-list.
2727 if (!StaticLoc.isValid() && Tok.is(tok::kw_static))
2728 StaticLoc = ConsumeToken();
2730 // Handle "direct-declarator [ type-qual-list[opt] * ]".
2731 bool isStar = false;
2732 OwningExprResult NumElements(Actions);
2734 // Handle the case where we have '[*]' as the array size. However, a leading
2735 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
2736 // the the token after the star is a ']'. Since stars in arrays are
2737 // infrequent, use of lookahead is not costly here.
2738 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
2739 ConsumeToken(); // Eat the '*'.
2741 if (StaticLoc.isValid()) {
2742 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
2743 StaticLoc = SourceLocation(); // Drop the static.
2746 } else if (Tok.isNot(tok::r_square)) {
2747 // Note, in C89, this production uses the constant-expr production instead
2748 // of assignment-expr. The only difference is that assignment-expr allows
2749 // things like '=' and '*='. Sema rejects these in C89 mode because they
2750 // are not i-c-e's, so we don't need to distinguish between the two here.
2752 // Parse the constant-expression or assignment-expression now (depending
2754 if (getLang().CPlusPlus)
2755 NumElements = ParseConstantExpression();
2757 NumElements = ParseAssignmentExpression();
2760 // If there was an error parsing the assignment-expression, recover.
2761 if (NumElements.isInvalid()) {
2762 D.setInvalidType(true);
2763 // If the expression was invalid, skip it.
2764 SkipUntil(tok::r_square);
2768 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc);
2770 // Remember that we parsed a array type, and remember its features.
2771 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
2772 StaticLoc.isValid(), isStar,
2773 NumElements.release(), StartLoc),
2777 /// [GNU] typeof-specifier:
2778 /// typeof ( expressions )
2779 /// typeof ( type-name )
2780 /// [GNU/C++] typeof unary-expression
2782 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
2783 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
2785 SourceLocation StartLoc = ConsumeToken();
2789 SourceRange CastRange;
2790 OwningExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok,
2795 if (CastRange.getEnd().isInvalid())
2796 // FIXME: Not accurate, the range gets one token more than it should.
2797 DS.SetRangeEnd(Tok.getLocation());
2799 DS.SetRangeEnd(CastRange.getEnd());
2803 DS.SetTypeSpecError();
2807 const char *PrevSpec = 0;
2808 // Check for duplicate type specifiers (e.g. "int typeof(int)").
2809 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
2811 Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
2815 // If we get here, the operand to the typeof was an expresion.
2816 if (Operand.isInvalid()) {
2817 DS.SetTypeSpecError();
2821 const char *PrevSpec = 0;
2822 // Check for duplicate type specifiers (e.g. "int typeof(int)").
2823 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
2825 Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;