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/Basic/OpenCL.h"
17 #include "clang/Sema/Scope.h"
18 #include "clang/Sema/ParsedTemplate.h"
19 #include "clang/Sema/PrettyDeclStackTrace.h"
20 #include "RAIIObjectsForParser.h"
21 #include "llvm/ADT/SmallSet.h"
22 #include "llvm/ADT/StringSwitch.h"
23 using namespace clang;
25 //===----------------------------------------------------------------------===//
26 // C99 6.7: Declarations.
27 //===----------------------------------------------------------------------===//
30 /// type-name: [C99 6.7.6]
31 /// specifier-qualifier-list abstract-declarator[opt]
33 /// Called type-id in C++.
34 TypeResult Parser::ParseTypeName(SourceRange *Range,
35 Declarator::TheContext Context,
38 // Parse the common declaration-specifiers piece.
39 DeclSpec DS(AttrFactory);
40 ParseSpecifierQualifierList(DS, AS);
42 *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : 0;
44 // Parse the abstract-declarator, if present.
45 Declarator DeclaratorInfo(DS, Context);
46 ParseDeclarator(DeclaratorInfo);
48 *Range = DeclaratorInfo.getSourceRange();
50 if (DeclaratorInfo.isInvalidType())
53 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
57 /// isAttributeLateParsed - Return true if the attribute has arguments that
58 /// require late parsing.
59 static bool isAttributeLateParsed(const IdentifierInfo &II) {
60 return llvm::StringSwitch<bool>(II.getName())
61 #include "clang/Parse/AttrLateParsed.inc"
66 /// ParseGNUAttributes - Parse a non-empty attributes list.
70 /// attributes attribute
73 /// '__attribute__' '(' '(' attribute-list ')' ')'
75 /// [GNU] attribute-list:
77 /// attribute_list ',' attrib
82 /// attrib-name '(' identifier ')'
83 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
84 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
86 /// [GNU] attrib-name:
92 /// FIXME: The GCC grammar/code for this construct implies we need two
93 /// token lookahead. Comment from gcc: "If they start with an identifier
94 /// which is followed by a comma or close parenthesis, then the arguments
95 /// start with that identifier; otherwise they are an expression list."
97 /// At the moment, I am not doing 2 token lookahead. I am also unaware of
98 /// any attributes that don't work (based on my limited testing). Most
99 /// attributes are very simple in practice. Until we find a bug, I don't see
100 /// a pressing need to implement the 2 token lookahead.
102 void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
103 SourceLocation *endLoc,
104 LateParsedAttrList *LateAttrs) {
105 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
107 while (Tok.is(tok::kw___attribute)) {
109 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
111 SkipUntil(tok::r_paren, true); // skip until ) or ;
114 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
115 SkipUntil(tok::r_paren, true); // skip until ) or ;
118 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
119 while (Tok.is(tok::identifier) || isDeclarationSpecifier() ||
120 Tok.is(tok::comma)) {
121 if (Tok.is(tok::comma)) {
122 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,))
126 // we have an identifier or declaration specifier (const, int, etc.)
127 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
128 SourceLocation AttrNameLoc = ConsumeToken();
130 if (Tok.is(tok::l_paren)) {
131 // handle "parameterized" attributes
132 if (LateAttrs && !ClassStack.empty() &&
133 isAttributeLateParsed(*AttrName)) {
134 // Delayed parsing is only available for attributes that occur
135 // in certain locations within a class scope.
136 LateParsedAttribute *LA =
137 new LateParsedAttribute(this, *AttrName, AttrNameLoc);
138 LateAttrs->push_back(LA);
139 getCurrentClass().LateParsedDeclarations.push_back(LA);
141 // consume everything up to and including the matching right parens
142 ConsumeAndStoreUntil(tok::r_paren, LA->Toks, true, false);
146 Eof.setLocation(Tok.getLocation());
147 LA->Toks.push_back(Eof);
149 ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc);
152 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc,
153 0, SourceLocation(), 0, 0);
156 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
157 SkipUntil(tok::r_paren, false);
158 SourceLocation Loc = Tok.getLocation();
159 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) {
160 SkipUntil(tok::r_paren, false);
168 /// Parse the arguments to a parameterized GNU attribute
169 void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
170 SourceLocation AttrNameLoc,
171 ParsedAttributes &Attrs,
172 SourceLocation *EndLoc) {
174 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
176 // Availability attributes have their own grammar.
177 if (AttrName->isStr("availability")) {
178 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc);
181 // Thread safety attributes fit into the FIXME case above, so we
182 // just parse the arguments as a list of expressions
183 if (IsThreadSafetyAttribute(AttrName->getName())) {
184 ParseThreadSafetyAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc);
188 ConsumeParen(); // ignore the left paren loc for now
190 if (Tok.is(tok::identifier)) {
191 IdentifierInfo *ParmName = Tok.getIdentifierInfo();
192 SourceLocation ParmLoc = ConsumeToken();
194 if (Tok.is(tok::r_paren)) {
195 // __attribute__(( mode(byte) ))
196 SourceLocation RParen = ConsumeParen();
197 Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0, AttrNameLoc,
198 ParmName, ParmLoc, 0, 0);
199 } else if (Tok.is(tok::comma)) {
201 // __attribute__(( format(printf, 1, 2) ))
202 ExprVector ArgExprs(Actions);
203 bool ArgExprsOk = true;
205 // now parse the non-empty comma separated list of expressions
207 ExprResult ArgExpr(ParseAssignmentExpression());
208 if (ArgExpr.isInvalid()) {
210 SkipUntil(tok::r_paren);
213 ArgExprs.push_back(ArgExpr.release());
215 if (Tok.isNot(tok::comma))
217 ConsumeToken(); // Eat the comma, move to the next argument
219 if (ArgExprsOk && Tok.is(tok::r_paren)) {
220 SourceLocation RParen = ConsumeParen();
221 Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0, AttrNameLoc,
222 ParmName, ParmLoc, ArgExprs.take(), ArgExprs.size());
225 } else { // not an identifier
226 switch (Tok.getKind()) {
228 // parse a possibly empty comma separated list of expressions
229 // __attribute__(( nonnull() ))
230 SourceLocation RParen = ConsumeParen();
231 Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0, AttrNameLoc,
232 0, SourceLocation(), 0, 0);
236 case tok::kw_wchar_t:
237 case tok::kw_char16_t:
238 case tok::kw_char32_t:
243 case tok::kw___int64:
245 case tok::kw_unsigned:
249 case tok::kw_typeof: {
250 // If it's a builtin type name, eat it and expect a rparen
251 // __attribute__(( vec_type_hint(char) ))
252 SourceLocation EndLoc = ConsumeToken();
253 if (Tok.is(tok::r_paren))
254 EndLoc = ConsumeParen();
256 = Attrs.addNew(AttrName, SourceRange(AttrNameLoc, EndLoc), 0,
257 AttrNameLoc, 0, SourceLocation(), 0, 0);
258 if (attr->getKind() == AttributeList::AT_IBOutletCollection)
259 Diag(Tok, diag::err_iboutletcollection_builtintype);
263 // __attribute__(( aligned(16) ))
264 ExprVector ArgExprs(Actions);
265 bool ArgExprsOk = true;
267 // now parse the list of expressions
269 ExprResult ArgExpr(ParseAssignmentExpression());
270 if (ArgExpr.isInvalid()) {
272 SkipUntil(tok::r_paren);
275 ArgExprs.push_back(ArgExpr.release());
277 if (Tok.isNot(tok::comma))
279 ConsumeToken(); // Eat the comma, move to the next argument
282 if (ArgExprsOk && Tok.is(tok::r_paren)) {
283 SourceLocation RParen = ConsumeParen();
284 Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0,
285 AttrNameLoc, 0, SourceLocation(),
286 ArgExprs.take(), ArgExprs.size());
294 /// ParseMicrosoftDeclSpec - Parse an __declspec construct
296 /// [MS] decl-specifier:
297 /// __declspec ( extended-decl-modifier-seq )
299 /// [MS] extended-decl-modifier-seq:
300 /// extended-decl-modifier[opt]
301 /// extended-decl-modifier extended-decl-modifier-seq
303 void Parser::ParseMicrosoftDeclSpec(ParsedAttributes &attrs) {
304 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
307 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
309 SkipUntil(tok::r_paren, true); // skip until ) or ;
313 while (Tok.getIdentifierInfo()) {
314 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
315 SourceLocation AttrNameLoc = ConsumeToken();
317 // FIXME: Remove this when we have proper __declspec(property()) support.
318 // Just skip everything inside property().
319 if (AttrName->getName() == "property") {
321 SkipUntil(tok::r_paren);
323 if (Tok.is(tok::l_paren)) {
325 // FIXME: This doesn't parse __declspec(property(get=get_func_name))
327 ExprResult ArgExpr(ParseAssignmentExpression());
328 if (!ArgExpr.isInvalid()) {
329 Expr *ExprList = ArgExpr.take();
330 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
331 SourceLocation(), &ExprList, 1, true);
333 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
334 SkipUntil(tok::r_paren, false);
336 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc,
337 0, SourceLocation(), 0, 0, true);
340 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
341 SkipUntil(tok::r_paren, false);
345 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
346 // Treat these like attributes
347 // FIXME: Allow Sema to distinguish between these and real attributes!
348 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) ||
349 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___cdecl) ||
350 Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64) ||
351 Tok.is(tok::kw___ptr32) ||
352 Tok.is(tok::kw___unaligned)) {
353 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
354 SourceLocation AttrNameLoc = ConsumeToken();
355 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64) ||
356 Tok.is(tok::kw___ptr32))
357 // FIXME: Support these properly!
359 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
360 SourceLocation(), 0, 0, true);
364 void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
365 // Treat these like attributes
366 while (Tok.is(tok::kw___pascal)) {
367 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
368 SourceLocation AttrNameLoc = ConsumeToken();
369 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
370 SourceLocation(), 0, 0, true);
374 void Parser::ParseOpenCLAttributes(ParsedAttributes &attrs) {
375 // Treat these like attributes
376 while (Tok.is(tok::kw___kernel)) {
377 SourceLocation AttrNameLoc = ConsumeToken();
378 attrs.addNew(PP.getIdentifierInfo("opencl_kernel_function"),
379 AttrNameLoc, 0, AttrNameLoc, 0,
380 SourceLocation(), 0, 0, false);
384 void Parser::ParseOpenCLQualifiers(DeclSpec &DS) {
385 SourceLocation Loc = Tok.getLocation();
386 switch(Tok.getKind()) {
387 // OpenCL qualifiers:
388 case tok::kw___private:
389 case tok::kw_private:
390 DS.getAttributes().addNewInteger(
391 Actions.getASTContext(),
392 PP.getIdentifierInfo("address_space"), Loc, 0);
395 case tok::kw___global:
396 DS.getAttributes().addNewInteger(
397 Actions.getASTContext(),
398 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_global);
401 case tok::kw___local:
402 DS.getAttributes().addNewInteger(
403 Actions.getASTContext(),
404 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_local);
407 case tok::kw___constant:
408 DS.getAttributes().addNewInteger(
409 Actions.getASTContext(),
410 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_constant);
413 case tok::kw___read_only:
414 DS.getAttributes().addNewInteger(
415 Actions.getASTContext(),
416 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_only);
419 case tok::kw___write_only:
420 DS.getAttributes().addNewInteger(
421 Actions.getASTContext(),
422 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_write_only);
425 case tok::kw___read_write:
426 DS.getAttributes().addNewInteger(
427 Actions.getASTContext(),
428 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_write);
434 /// \brief Parse a version number.
438 /// simple-integer ',' simple-integer
439 /// simple-integer ',' simple-integer ',' simple-integer
440 VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
441 Range = Tok.getLocation();
443 if (!Tok.is(tok::numeric_constant)) {
444 Diag(Tok, diag::err_expected_version);
445 SkipUntil(tok::comma, tok::r_paren, true, true, true);
446 return VersionTuple();
449 // Parse the major (and possibly minor and subminor) versions, which
450 // are stored in the numeric constant. We utilize a quirk of the
451 // lexer, which is that it handles something like 1.2.3 as a single
452 // numeric constant, rather than two separate tokens.
453 llvm::SmallString<512> Buffer;
454 Buffer.resize(Tok.getLength()+1);
455 const char *ThisTokBegin = &Buffer[0];
457 // Get the spelling of the token, which eliminates trigraphs, etc.
458 bool Invalid = false;
459 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
461 return VersionTuple();
463 // Parse the major version.
464 unsigned AfterMajor = 0;
466 while (AfterMajor < ActualLength && isdigit(ThisTokBegin[AfterMajor])) {
467 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
471 if (AfterMajor == 0) {
472 Diag(Tok, diag::err_expected_version);
473 SkipUntil(tok::comma, tok::r_paren, true, true, true);
474 return VersionTuple();
477 if (AfterMajor == ActualLength) {
480 // We only had a single version component.
482 Diag(Tok, diag::err_zero_version);
483 return VersionTuple();
486 return VersionTuple(Major);
489 if (ThisTokBegin[AfterMajor] != '.' || (AfterMajor + 1 == ActualLength)) {
490 Diag(Tok, diag::err_expected_version);
491 SkipUntil(tok::comma, tok::r_paren, true, true, true);
492 return VersionTuple();
495 // Parse the minor version.
496 unsigned AfterMinor = AfterMajor + 1;
498 while (AfterMinor < ActualLength && isdigit(ThisTokBegin[AfterMinor])) {
499 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
503 if (AfterMinor == ActualLength) {
506 // We had major.minor.
507 if (Major == 0 && Minor == 0) {
508 Diag(Tok, diag::err_zero_version);
509 return VersionTuple();
512 return VersionTuple(Major, Minor);
515 // If what follows is not a '.', we have a problem.
516 if (ThisTokBegin[AfterMinor] != '.') {
517 Diag(Tok, diag::err_expected_version);
518 SkipUntil(tok::comma, tok::r_paren, true, true, true);
519 return VersionTuple();
522 // Parse the subminor version.
523 unsigned AfterSubminor = AfterMinor + 1;
524 unsigned Subminor = 0;
525 while (AfterSubminor < ActualLength && isdigit(ThisTokBegin[AfterSubminor])) {
526 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
530 if (AfterSubminor != ActualLength) {
531 Diag(Tok, diag::err_expected_version);
532 SkipUntil(tok::comma, tok::r_paren, true, true, true);
533 return VersionTuple();
536 return VersionTuple(Major, Minor, Subminor);
539 /// \brief Parse the contents of the "availability" attribute.
541 /// availability-attribute:
542 /// 'availability' '(' platform ',' version-arg-list ')'
547 /// version-arg-list:
549 /// version-arg ',' version-arg-list
552 /// 'introduced' '=' version
553 /// 'deprecated' '=' version
554 /// 'removed' = version
556 void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
557 SourceLocation AvailabilityLoc,
558 ParsedAttributes &attrs,
559 SourceLocation *endLoc) {
560 SourceLocation PlatformLoc;
561 IdentifierInfo *Platform = 0;
563 enum { Introduced, Deprecated, Obsoleted, Unknown };
564 AvailabilityChange Changes[Unknown];
567 BalancedDelimiterTracker T(*this, tok::l_paren);
568 if (T.consumeOpen()) {
569 Diag(Tok, diag::err_expected_lparen);
573 // Parse the platform name,
574 if (Tok.isNot(tok::identifier)) {
575 Diag(Tok, diag::err_availability_expected_platform);
576 SkipUntil(tok::r_paren);
579 Platform = Tok.getIdentifierInfo();
580 PlatformLoc = ConsumeToken();
582 // Parse the ',' following the platform name.
583 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::r_paren))
586 // If we haven't grabbed the pointers for the identifiers
587 // "introduced", "deprecated", and "obsoleted", do so now.
588 if (!Ident_introduced) {
589 Ident_introduced = PP.getIdentifierInfo("introduced");
590 Ident_deprecated = PP.getIdentifierInfo("deprecated");
591 Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
592 Ident_unavailable = PP.getIdentifierInfo("unavailable");
595 // Parse the set of introductions/deprecations/removals.
596 SourceLocation UnavailableLoc;
598 if (Tok.isNot(tok::identifier)) {
599 Diag(Tok, diag::err_availability_expected_change);
600 SkipUntil(tok::r_paren);
603 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
604 SourceLocation KeywordLoc = ConsumeToken();
606 if (Keyword == Ident_unavailable) {
607 if (UnavailableLoc.isValid()) {
608 Diag(KeywordLoc, diag::err_availability_redundant)
609 << Keyword << SourceRange(UnavailableLoc);
611 UnavailableLoc = KeywordLoc;
613 if (Tok.isNot(tok::comma))
620 if (Tok.isNot(tok::equal)) {
621 Diag(Tok, diag::err_expected_equal_after)
623 SkipUntil(tok::r_paren);
628 SourceRange VersionRange;
629 VersionTuple Version = ParseVersionTuple(VersionRange);
631 if (Version.empty()) {
632 SkipUntil(tok::r_paren);
637 if (Keyword == Ident_introduced)
639 else if (Keyword == Ident_deprecated)
641 else if (Keyword == Ident_obsoleted)
646 if (Index < Unknown) {
647 if (!Changes[Index].KeywordLoc.isInvalid()) {
648 Diag(KeywordLoc, diag::err_availability_redundant)
650 << SourceRange(Changes[Index].KeywordLoc,
651 Changes[Index].VersionRange.getEnd());
654 Changes[Index].KeywordLoc = KeywordLoc;
655 Changes[Index].Version = Version;
656 Changes[Index].VersionRange = VersionRange;
658 Diag(KeywordLoc, diag::err_availability_unknown_change)
659 << Keyword << VersionRange;
662 if (Tok.isNot(tok::comma))
669 if (T.consumeClose())
673 *endLoc = T.getCloseLocation();
675 // The 'unavailable' availability cannot be combined with any other
676 // availability changes. Make sure that hasn't happened.
677 if (UnavailableLoc.isValid()) {
678 bool Complained = false;
679 for (unsigned Index = Introduced; Index != Unknown; ++Index) {
680 if (Changes[Index].KeywordLoc.isValid()) {
682 Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
683 << SourceRange(Changes[Index].KeywordLoc,
684 Changes[Index].VersionRange.getEnd());
688 // Clear out the availability.
689 Changes[Index] = AvailabilityChange();
694 // Record this attribute
695 attrs.addNew(&Availability,
696 SourceRange(AvailabilityLoc, T.getCloseLocation()),
698 Platform, PlatformLoc,
702 UnavailableLoc, false, false);
706 // Late Parsed Attributes:
707 // See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
709 void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
711 void Parser::LateParsedClass::ParseLexedAttributes() {
712 Self->ParseLexedAttributes(*Class);
715 void Parser::LateParsedAttribute::ParseLexedAttributes() {
716 Self->ParseLexedAttribute(*this);
719 /// Wrapper class which calls ParseLexedAttribute, after setting up the
720 /// scope appropriately.
721 void Parser::ParseLexedAttributes(ParsingClass &Class) {
722 // Deal with templates
723 // FIXME: Test cases to make sure this does the right thing for templates.
724 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
725 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
727 if (HasTemplateScope)
728 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
730 // Set or update the scope flags to include Scope::ThisScope.
731 bool AlreadyHasClassScope = Class.TopLevelClass;
732 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope|Scope::ThisScope;
733 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
734 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
736 for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i) {
737 Class.LateParsedDeclarations[i]->ParseLexedAttributes();
741 /// \brief Finish parsing an attribute for which parsing was delayed.
742 /// This will be called at the end of parsing a class declaration
743 /// for each LateParsedAttribute. We consume the saved tokens and
744 /// create an attribute with the arguments filled in. We add this
745 /// to the Attribute list for the decl.
746 void Parser::ParseLexedAttribute(LateParsedAttribute &LA) {
747 // Save the current token position.
748 SourceLocation OrigLoc = Tok.getLocation();
750 // Append the current token at the end of the new token stream so that it
752 LA.Toks.push_back(Tok);
753 PP.EnterTokenStream(LA.Toks.data(), LA.Toks.size(), true, false);
754 // Consume the previously pushed token.
757 ParsedAttributes Attrs(AttrFactory);
758 SourceLocation endLoc;
760 // If the Decl is templatized, add template parameters to scope.
761 bool HasTemplateScope = LA.D && LA.D->isTemplateDecl();
762 ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
763 if (HasTemplateScope)
764 Actions.ActOnReenterTemplateScope(Actions.CurScope, LA.D);
766 // If the Decl is on a function, add function parameters to the scope.
767 bool HasFunctionScope = LA.D && LA.D->isFunctionOrFunctionTemplate();
768 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope, HasFunctionScope);
769 if (HasFunctionScope)
770 Actions.ActOnReenterFunctionContext(Actions.CurScope, LA.D);
772 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc);
774 if (HasFunctionScope) {
775 Actions.ActOnExitFunctionContext();
776 FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
778 if (HasTemplateScope) {
782 // Late parsed attributes must be attached to Decls by hand. If the
783 // LA.D is not set, then this was not done properly.
784 assert(LA.D && "No decl attached to late parsed attribute");
785 Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.D, Attrs);
787 if (Tok.getLocation() != OrigLoc) {
788 // Due to a parsing error, we either went over the cached tokens or
789 // there are still cached tokens left, so we skip the leftover tokens.
790 // Since this is an uncommon situation that should be avoided, use the
791 // expensive isBeforeInTranslationUnit call.
792 if (PP.getSourceManager().isBeforeInTranslationUnit(Tok.getLocation(),
794 while (Tok.getLocation() != OrigLoc && Tok.isNot(tok::eof))
799 /// \brief Wrapper around a case statement checking if AttrName is
800 /// one of the thread safety attributes
801 bool Parser::IsThreadSafetyAttribute(llvm::StringRef AttrName){
802 return llvm::StringSwitch<bool>(AttrName)
803 .Case("guarded_by", true)
804 .Case("guarded_var", true)
805 .Case("pt_guarded_by", true)
806 .Case("pt_guarded_var", true)
807 .Case("lockable", true)
808 .Case("scoped_lockable", true)
809 .Case("no_thread_safety_analysis", true)
810 .Case("acquired_after", true)
811 .Case("acquired_before", true)
812 .Case("exclusive_lock_function", true)
813 .Case("shared_lock_function", true)
814 .Case("exclusive_trylock_function", true)
815 .Case("shared_trylock_function", true)
816 .Case("unlock_function", true)
817 .Case("lock_returned", true)
818 .Case("locks_excluded", true)
819 .Case("exclusive_locks_required", true)
820 .Case("shared_locks_required", true)
824 /// \brief Parse the contents of thread safety attributes. These
825 /// should always be parsed as an expression list.
827 /// We need to special case the parsing due to the fact that if the first token
828 /// of the first argument is an identifier, the main parse loop will store
829 /// that token as a "parameter" and the rest of
830 /// the arguments will be added to a list of "arguments". However,
831 /// subsequent tokens in the first argument are lost. We instead parse each
832 /// argument as an expression and add all arguments to the list of "arguments".
833 /// In future, we will take advantage of this special case to also
834 /// deal with some argument scoping issues here (for example, referring to a
835 /// function parameter in the attribute on that function).
836 void Parser::ParseThreadSafetyAttribute(IdentifierInfo &AttrName,
837 SourceLocation AttrNameLoc,
838 ParsedAttributes &Attrs,
839 SourceLocation *EndLoc) {
840 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
842 BalancedDelimiterTracker T(*this, tok::l_paren);
845 ExprVector ArgExprs(Actions);
846 bool ArgExprsOk = true;
848 // now parse the list of expressions
850 ExprResult ArgExpr(ParseAssignmentExpression());
851 if (ArgExpr.isInvalid()) {
856 ArgExprs.push_back(ArgExpr.release());
858 if (Tok.isNot(tok::comma))
860 ConsumeToken(); // Eat the comma, move to the next argument
863 if (ArgExprsOk && !T.consumeClose()) {
864 Attrs.addNew(&AttrName, AttrNameLoc, 0, AttrNameLoc, 0, SourceLocation(),
865 ArgExprs.take(), ArgExprs.size());
868 *EndLoc = T.getCloseLocation();
871 void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) {
872 Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed)
876 /// ParseDeclaration - Parse a full 'declaration', which consists of
877 /// declaration-specifiers, some number of declarators, and a semicolon.
878 /// 'Context' should be a Declarator::TheContext value. This returns the
879 /// location of the semicolon in DeclEnd.
881 /// declaration: [C99 6.7]
882 /// block-declaration ->
883 /// simple-declaration
885 /// [C++] template-declaration
886 /// [C++] namespace-definition
887 /// [C++] using-directive
888 /// [C++] using-declaration
889 /// [C++0x/C1X] static_assert-declaration
890 /// others... [FIXME]
892 Parser::DeclGroupPtrTy Parser::ParseDeclaration(StmtVector &Stmts,
894 SourceLocation &DeclEnd,
895 ParsedAttributesWithRange &attrs) {
896 ParenBraceBracketBalancer BalancerRAIIObj(*this);
897 // Must temporarily exit the objective-c container scope for
898 // parsing c none objective-c decls.
899 ObjCDeclContextSwitch ObjCDC(*this);
901 Decl *SingleDecl = 0;
903 switch (Tok.getKind()) {
904 case tok::kw_template:
906 ProhibitAttributes(attrs);
907 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
910 // Could be the start of an inline namespace. Allowed as an ext in C++03.
911 if (getLang().CPlusPlus && NextToken().is(tok::kw_namespace)) {
912 ProhibitAttributes(attrs);
913 SourceLocation InlineLoc = ConsumeToken();
914 SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc);
917 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs,
919 case tok::kw_namespace:
920 ProhibitAttributes(attrs);
921 SingleDecl = ParseNamespace(Context, DeclEnd);
924 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
925 DeclEnd, attrs, &OwnedType);
927 case tok::kw_static_assert:
928 case tok::kw__Static_assert:
929 ProhibitAttributes(attrs);
930 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
933 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs, true);
936 // This routine returns a DeclGroup, if the thing we parsed only contains a
937 // single decl, convert it now. Alias declarations can also declare a type;
938 // include that too if it is present.
939 return Actions.ConvertDeclToDeclGroup(SingleDecl, OwnedType);
942 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
943 /// declaration-specifiers init-declarator-list[opt] ';'
944 ///[C90/C++]init-declarator-list ';' [TODO]
945 /// [OMP] threadprivate-directive [TODO]
947 /// for-range-declaration: [C++0x 6.5p1: stmt.ranged]
948 /// attribute-specifier-seq[opt] type-specifier-seq declarator
950 /// If RequireSemi is false, this does not check for a ';' at the end of the
951 /// declaration. If it is true, it checks for and eats it.
953 /// If FRI is non-null, we might be parsing a for-range-declaration instead
954 /// of a simple-declaration. If we find that we are, we also parse the
955 /// for-range-initializer, and place it here.
956 Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(StmtVector &Stmts,
958 SourceLocation &DeclEnd,
959 ParsedAttributes &attrs,
962 // Parse the common declaration-specifiers piece.
963 ParsingDeclSpec DS(*this);
964 DS.takeAttributesFrom(attrs);
966 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none,
967 getDeclSpecContextFromDeclaratorContext(Context));
968 StmtResult R = Actions.ActOnVlaStmt(DS);
970 Stmts.push_back(R.release());
972 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
973 // declaration-specifiers init-declarator-list[opt] ';'
974 if (Tok.is(tok::semi)) {
975 if (RequireSemi) ConsumeToken();
976 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
978 DS.complete(TheDecl);
979 return Actions.ConvertDeclToDeclGroup(TheDecl);
982 return ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, &DeclEnd, FRI);
985 /// ParseDeclGroup - Having concluded that this is either a function
986 /// definition or a group of object declarations, actually parse the
988 Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
990 bool AllowFunctionDefinitions,
991 SourceLocation *DeclEnd,
993 // Parse the first declarator.
994 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context));
997 // Bail out if the first declarator didn't seem well-formed.
998 if (!D.hasName() && !D.mayOmitIdentifier()) {
999 // Skip until ; or }.
1000 SkipUntil(tok::r_brace, true, true);
1001 if (Tok.is(tok::semi))
1003 return DeclGroupPtrTy();
1006 // Check to see if we have a function *definition* which must have a body.
1007 if (AllowFunctionDefinitions && D.isFunctionDeclarator() &&
1008 // Look at the next token to make sure that this isn't a function
1009 // declaration. We have to check this because __attribute__ might be the
1010 // start of a function definition in GCC-extended K&R C.
1011 !isDeclarationAfterDeclarator()) {
1013 if (isStartOfFunctionDefinition(D)) {
1014 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
1015 Diag(Tok, diag::err_function_declared_typedef);
1017 // Recover by treating the 'typedef' as spurious.
1018 DS.ClearStorageClassSpecs();
1021 Decl *TheDecl = ParseFunctionDefinition(D);
1022 return Actions.ConvertDeclToDeclGroup(TheDecl);
1025 if (isDeclarationSpecifier()) {
1026 // If there is an invalid declaration specifier right after the function
1027 // prototype, then we must be in a missing semicolon case where this isn't
1028 // actually a body. Just fall through into the code that handles it as a
1029 // prototype, and let the top-level code handle the erroneous declspec
1030 // where it would otherwise expect a comma or semicolon.
1032 Diag(Tok, diag::err_expected_fn_body);
1033 SkipUntil(tok::semi);
1034 return DeclGroupPtrTy();
1038 if (ParseAttributesAfterDeclarator(D))
1039 return DeclGroupPtrTy();
1041 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
1042 // must parse and analyze the for-range-initializer before the declaration is
1044 if (FRI && Tok.is(tok::colon)) {
1045 FRI->ColonLoc = ConsumeToken();
1046 if (Tok.is(tok::l_brace))
1047 FRI->RangeExpr = ParseBraceInitializer();
1049 FRI->RangeExpr = ParseExpression();
1050 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1051 Actions.ActOnCXXForRangeDecl(ThisDecl);
1052 Actions.FinalizeDeclaration(ThisDecl);
1053 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, &ThisDecl, 1);
1056 SmallVector<Decl *, 8> DeclsInGroup;
1057 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(D);
1058 D.complete(FirstDecl);
1060 DeclsInGroup.push_back(FirstDecl);
1062 // If we don't have a comma, it is either the end of the list (a ';') or an
1064 while (Tok.is(tok::comma)) {
1065 // Consume the comma.
1068 // Parse the next declarator.
1071 // Accept attributes in an init-declarator. In the first declarator in a
1072 // declaration, these would be part of the declspec. In subsequent
1073 // declarators, they become part of the declarator itself, so that they
1074 // don't apply to declarators after *this* one. Examples:
1075 // short __attribute__((common)) var; -> declspec
1076 // short var __attribute__((common)); -> declarator
1077 // short x, __attribute__((common)) var; -> declarator
1078 MaybeParseGNUAttributes(D);
1082 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
1083 D.complete(ThisDecl);
1085 DeclsInGroup.push_back(ThisDecl);
1089 *DeclEnd = Tok.getLocation();
1091 if (Context != Declarator::ForContext &&
1092 ExpectAndConsume(tok::semi,
1093 Context == Declarator::FileContext
1094 ? diag::err_invalid_token_after_toplevel_declarator
1095 : diag::err_expected_semi_declaration)) {
1096 // Okay, there was no semicolon and one was expected. If we see a
1097 // declaration specifier, just assume it was missing and continue parsing.
1098 // Otherwise things are very confused and we skip to recover.
1099 if (!isDeclarationSpecifier()) {
1100 SkipUntil(tok::r_brace, true, true);
1101 if (Tok.is(tok::semi))
1106 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS,
1107 DeclsInGroup.data(),
1108 DeclsInGroup.size());
1111 /// Parse an optional simple-asm-expr and attributes, and attach them to a
1112 /// declarator. Returns true on an error.
1113 bool Parser::ParseAttributesAfterDeclarator(Declarator &D) {
1114 // If a simple-asm-expr is present, parse it.
1115 if (Tok.is(tok::kw_asm)) {
1117 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
1118 if (AsmLabel.isInvalid()) {
1119 SkipUntil(tok::semi, true, true);
1123 D.setAsmLabel(AsmLabel.release());
1127 MaybeParseGNUAttributes(D);
1131 /// \brief Parse 'declaration' after parsing 'declaration-specifiers
1132 /// declarator'. This method parses the remainder of the declaration
1133 /// (including any attributes or initializer, among other things) and
1134 /// finalizes the declaration.
1136 /// init-declarator: [C99 6.7]
1138 /// declarator '=' initializer
1139 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
1140 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
1141 /// [C++] declarator initializer[opt]
1143 /// [C++] initializer:
1144 /// [C++] '=' initializer-clause
1145 /// [C++] '(' expression-list ')'
1146 /// [C++0x] '=' 'default' [TODO]
1147 /// [C++0x] '=' 'delete'
1148 /// [C++0x] braced-init-list
1150 /// According to the standard grammar, =default and =delete are function
1151 /// definitions, but that definitely doesn't fit with the parser here.
1153 Decl *Parser::ParseDeclarationAfterDeclarator(Declarator &D,
1154 const ParsedTemplateInfo &TemplateInfo) {
1155 if (ParseAttributesAfterDeclarator(D))
1158 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
1161 Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(Declarator &D,
1162 const ParsedTemplateInfo &TemplateInfo) {
1163 // Inform the current actions module that we just parsed this declarator.
1165 switch (TemplateInfo.Kind) {
1166 case ParsedTemplateInfo::NonTemplate:
1167 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1170 case ParsedTemplateInfo::Template:
1171 case ParsedTemplateInfo::ExplicitSpecialization:
1172 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
1173 MultiTemplateParamsArg(Actions,
1174 TemplateInfo.TemplateParams->data(),
1175 TemplateInfo.TemplateParams->size()),
1179 case ParsedTemplateInfo::ExplicitInstantiation: {
1181 = Actions.ActOnExplicitInstantiation(getCurScope(),
1182 TemplateInfo.ExternLoc,
1183 TemplateInfo.TemplateLoc,
1185 if (ThisRes.isInvalid()) {
1186 SkipUntil(tok::semi, true, true);
1190 ThisDecl = ThisRes.get();
1195 bool TypeContainsAuto =
1196 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto;
1198 // Parse declarator '=' initializer.
1199 if (isTokenEqualOrMistypedEqualEqual(
1200 diag::err_invalid_equalequal_after_declarator)) {
1202 if (Tok.is(tok::kw_delete)) {
1203 if (D.isFunctionDeclarator())
1204 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
1207 Diag(ConsumeToken(), diag::err_deleted_non_function);
1208 } else if (Tok.is(tok::kw_default)) {
1209 if (D.isFunctionDeclarator())
1210 Diag(Tok, diag::err_default_delete_in_multiple_declaration)
1213 Diag(ConsumeToken(), diag::err_default_special_members);
1215 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1217 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
1220 if (Tok.is(tok::code_completion)) {
1221 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
1226 ExprResult Init(ParseInitializer());
1228 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1229 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
1233 if (Init.isInvalid()) {
1234 SkipUntil(tok::comma, true, true);
1235 Actions.ActOnInitializerError(ThisDecl);
1237 Actions.AddInitializerToDecl(ThisDecl, Init.take(),
1238 /*DirectInit=*/false, TypeContainsAuto);
1240 } else if (Tok.is(tok::l_paren)) {
1241 // Parse C++ direct initializer: '(' expression-list ')'
1242 BalancedDelimiterTracker T(*this, tok::l_paren);
1245 ExprVector Exprs(Actions);
1246 CommaLocsTy CommaLocs;
1248 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1250 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
1253 if (ParseExpressionList(Exprs, CommaLocs)) {
1254 SkipUntil(tok::r_paren);
1256 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1257 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
1264 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
1265 "Unexpected number of commas!");
1267 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1268 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
1272 Actions.AddCXXDirectInitializerToDecl(ThisDecl, T.getOpenLocation(),
1274 T.getCloseLocation(),
1277 } else if (getLang().CPlusPlus0x && Tok.is(tok::l_brace)) {
1278 // Parse C++0x braced-init-list.
1279 if (D.getCXXScopeSpec().isSet()) {
1281 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
1284 ExprResult Init(ParseBraceInitializer());
1286 if (D.getCXXScopeSpec().isSet()) {
1287 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
1291 if (Init.isInvalid()) {
1292 Actions.ActOnInitializerError(ThisDecl);
1294 Actions.AddInitializerToDecl(ThisDecl, Init.take(),
1295 /*DirectInit=*/true, TypeContainsAuto);
1298 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto);
1301 Actions.FinalizeDeclaration(ThisDecl);
1306 /// ParseSpecifierQualifierList
1307 /// specifier-qualifier-list:
1308 /// type-specifier specifier-qualifier-list[opt]
1309 /// type-qualifier specifier-qualifier-list[opt]
1310 /// [GNU] attributes specifier-qualifier-list[opt]
1312 void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS) {
1313 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
1314 /// parse declaration-specifiers and complain about extra stuff.
1315 /// TODO: diagnose attribute-specifiers and alignment-specifiers.
1316 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS);
1318 // Validate declspec for type-name.
1319 unsigned Specs = DS.getParsedSpecifiers();
1320 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() &&
1321 !DS.hasAttributes())
1322 Diag(Tok, diag::err_typename_requires_specqual);
1324 // Issue diagnostic and remove storage class if present.
1325 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
1326 if (DS.getStorageClassSpecLoc().isValid())
1327 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
1329 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass);
1330 DS.ClearStorageClassSpecs();
1333 // Issue diagnostic and remove function specfier if present.
1334 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
1335 if (DS.isInlineSpecified())
1336 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
1337 if (DS.isVirtualSpecified())
1338 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
1339 if (DS.isExplicitSpecified())
1340 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
1341 DS.ClearFunctionSpecs();
1345 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
1346 /// specified token is valid after the identifier in a declarator which
1347 /// immediately follows the declspec. For example, these things are valid:
1349 /// int x [ 4]; // direct-declarator
1350 /// int x ( int y); // direct-declarator
1351 /// int(int x ) // direct-declarator
1352 /// int x ; // simple-declaration
1353 /// int x = 17; // init-declarator-list
1354 /// int x , y; // init-declarator-list
1355 /// int x __asm__ ("foo"); // init-declarator-list
1356 /// int x : 4; // struct-declarator
1357 /// int x { 5}; // C++'0x unified initializers
1359 /// This is not, because 'x' does not immediately follow the declspec (though
1360 /// ')' happens to be valid anyway).
1363 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
1364 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) ||
1365 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) ||
1366 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon);
1370 /// ParseImplicitInt - This method is called when we have an non-typename
1371 /// identifier in a declspec (which normally terminates the decl spec) when
1372 /// the declspec has no type specifier. In this case, the declspec is either
1373 /// malformed or is "implicit int" (in K&R and C89).
1375 /// This method handles diagnosing this prettily and returns false if the
1376 /// declspec is done being processed. If it recovers and thinks there may be
1377 /// other pieces of declspec after it, it returns true.
1379 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
1380 const ParsedTemplateInfo &TemplateInfo,
1381 AccessSpecifier AS) {
1382 assert(Tok.is(tok::identifier) && "should have identifier");
1384 SourceLocation Loc = Tok.getLocation();
1385 // If we see an identifier that is not a type name, we normally would
1386 // parse it as the identifer being declared. However, when a typename
1387 // is typo'd or the definition is not included, this will incorrectly
1388 // parse the typename as the identifier name and fall over misparsing
1389 // later parts of the diagnostic.
1391 // As such, we try to do some look-ahead in cases where this would
1392 // otherwise be an "implicit-int" case to see if this is invalid. For
1393 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
1394 // an identifier with implicit int, we'd get a parse error because the
1395 // next token is obviously invalid for a type. Parse these as a case
1396 // with an invalid type specifier.
1397 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
1399 // Since we know that this either implicit int (which is rare) or an
1400 // error, we'd do lookahead to try to do better recovery.
1401 if (isValidAfterIdentifierInDeclarator(NextToken())) {
1402 // If this token is valid for implicit int, e.g. "static x = 4", then
1403 // we just avoid eating the identifier, so it will be parsed as the
1404 // identifier in the declarator.
1408 // Otherwise, if we don't consume this token, we are going to emit an
1409 // error anyway. Try to recover from various common problems. Check
1410 // to see if this was a reference to a tag name without a tag specified.
1411 // This is a common problem in C (saying 'foo' instead of 'struct foo').
1413 // C++ doesn't need this, and isTagName doesn't take SS.
1415 const char *TagName = 0, *FixitTagName = 0;
1416 tok::TokenKind TagKind = tok::unknown;
1418 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
1420 case DeclSpec::TST_enum:
1421 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
1422 case DeclSpec::TST_union:
1423 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
1424 case DeclSpec::TST_struct:
1425 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
1426 case DeclSpec::TST_class:
1427 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
1431 Diag(Loc, diag::err_use_of_tag_name_without_tag)
1432 << Tok.getIdentifierInfo() << TagName << getLang().CPlusPlus
1433 << FixItHint::CreateInsertion(Tok.getLocation(),FixitTagName);
1435 // Parse this as a tag as if the missing tag were present.
1436 if (TagKind == tok::kw_enum)
1437 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS);
1439 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS);
1444 // This is almost certainly an invalid type name. Let the action emit a
1445 // diagnostic and attempt to recover.
1447 if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc,
1448 getCurScope(), SS, T)) {
1449 // The action emitted a diagnostic, so we don't have to.
1451 // The action has suggested that the type T could be used. Set that as
1452 // the type in the declaration specifiers, consume the would-be type
1453 // name token, and we're done.
1454 const char *PrevSpec;
1456 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T);
1457 DS.SetRangeEnd(Tok.getLocation());
1460 // There may be other declaration specifiers after this.
1464 // Fall through; the action had no suggestion for us.
1466 // The action did not emit a diagnostic, so emit one now.
1468 if (SS) R = SS->getRange();
1469 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R;
1472 // Mark this as an error.
1473 const char *PrevSpec;
1475 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID);
1476 DS.SetRangeEnd(Tok.getLocation());
1479 // TODO: Could inject an invalid typedef decl in an enclosing scope to
1480 // avoid rippling error messages on subsequent uses of the same type,
1481 // could be useful if #include was forgotten.
1485 /// \brief Determine the declaration specifier context from the declarator
1488 /// \param Context the declarator context, which is one of the
1489 /// Declarator::TheContext enumerator values.
1490 Parser::DeclSpecContext
1491 Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) {
1492 if (Context == Declarator::MemberContext)
1494 if (Context == Declarator::FileContext)
1495 return DSC_top_level;
1499 /// ParseAlignArgument - Parse the argument to an alignment-specifier.
1501 /// FIXME: Simply returns an alignof() expression if the argument is a
1502 /// type. Ideally, the type should be propagated directly into Sema.
1504 /// [C1X/C++0x] type-id
1505 /// [C1X] constant-expression
1506 /// [C++0x] assignment-expression
1507 ExprResult Parser::ParseAlignArgument(SourceLocation Start) {
1508 if (isTypeIdInParens()) {
1509 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated);
1510 SourceLocation TypeLoc = Tok.getLocation();
1511 ParsedType Ty = ParseTypeName().get();
1512 SourceRange TypeRange(Start, Tok.getLocation());
1513 return Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
1514 Ty.getAsOpaquePtr(), TypeRange);
1516 return ParseConstantExpression();
1519 /// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
1520 /// attribute to Attrs.
1522 /// alignment-specifier:
1523 /// [C1X] '_Alignas' '(' type-id ')'
1524 /// [C1X] '_Alignas' '(' constant-expression ')'
1525 /// [C++0x] 'alignas' '(' type-id ')'
1526 /// [C++0x] 'alignas' '(' assignment-expression ')'
1527 void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
1528 SourceLocation *endLoc) {
1529 assert((Tok.is(tok::kw_alignas) || Tok.is(tok::kw__Alignas)) &&
1530 "Not an alignment-specifier!");
1532 SourceLocation KWLoc = Tok.getLocation();
1535 BalancedDelimiterTracker T(*this, tok::l_paren);
1536 if (T.expectAndConsume(diag::err_expected_lparen))
1539 ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation());
1540 if (ArgExpr.isInvalid()) {
1541 SkipUntil(tok::r_paren);
1547 *endLoc = T.getCloseLocation();
1549 ExprVector ArgExprs(Actions);
1550 ArgExprs.push_back(ArgExpr.release());
1551 Attrs.addNew(PP.getIdentifierInfo("aligned"), KWLoc, 0, KWLoc,
1552 0, T.getOpenLocation(), ArgExprs.take(), 1, false, true);
1555 /// ParseDeclarationSpecifiers
1556 /// declaration-specifiers: [C99 6.7]
1557 /// storage-class-specifier declaration-specifiers[opt]
1558 /// type-specifier declaration-specifiers[opt]
1559 /// [C99] function-specifier declaration-specifiers[opt]
1560 /// [C1X] alignment-specifier declaration-specifiers[opt]
1561 /// [GNU] attributes declaration-specifiers[opt]
1562 /// [Clang] '__module_private__' declaration-specifiers[opt]
1564 /// storage-class-specifier: [C99 6.7.1]
1571 /// [GNU] '__thread'
1572 /// function-specifier: [C99 6.7.4]
1575 /// [C++] 'explicit'
1576 /// [OpenCL] '__kernel'
1577 /// 'friend': [C++ dcl.friend]
1578 /// 'constexpr': [C++0x dcl.constexpr]
1581 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
1582 const ParsedTemplateInfo &TemplateInfo,
1584 DeclSpecContext DSContext) {
1585 if (DS.getSourceRange().isInvalid()) {
1586 DS.SetRangeStart(Tok.getLocation());
1587 DS.SetRangeEnd(Tok.getLocation());
1591 bool isInvalid = false;
1592 const char *PrevSpec = 0;
1593 unsigned DiagID = 0;
1595 SourceLocation Loc = Tok.getLocation();
1597 switch (Tok.getKind()) {
1600 // [C++0x] decl-specifier-seq: decl-specifier attribute-specifier-seq[opt]
1601 MaybeParseCXX0XAttributes(DS.getAttributes());
1603 // If this is not a declaration specifier token, we're done reading decl
1604 // specifiers. First verify that DeclSpec's are consistent.
1605 DS.Finish(Diags, PP);
1608 case tok::code_completion: {
1609 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
1610 if (DS.hasTypeSpecifier()) {
1611 bool AllowNonIdentifiers
1612 = (getCurScope()->getFlags() & (Scope::ControlScope |
1614 Scope::TemplateParamScope |
1615 Scope::FunctionPrototypeScope |
1616 Scope::AtCatchScope)) == 0;
1617 bool AllowNestedNameSpecifiers
1618 = DSContext == DSC_top_level ||
1619 (DSContext == DSC_class && DS.isFriendSpecified());
1621 Actions.CodeCompleteDeclSpec(getCurScope(), DS,
1622 AllowNonIdentifiers,
1623 AllowNestedNameSpecifiers);
1624 return cutOffParsing();
1627 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
1628 CCC = Sema::PCC_LocalDeclarationSpecifiers;
1629 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
1630 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate
1631 : Sema::PCC_Template;
1632 else if (DSContext == DSC_class)
1633 CCC = Sema::PCC_Class;
1634 else if (ObjCImpDecl)
1635 CCC = Sema::PCC_ObjCImplementation;
1637 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
1638 return cutOffParsing();
1641 case tok::coloncolon: // ::foo::bar
1642 // C++ scope specifier. Annotate and loop, or bail out on error.
1643 if (TryAnnotateCXXScopeToken(true)) {
1644 if (!DS.hasTypeSpecifier())
1645 DS.SetTypeSpecError();
1646 goto DoneWithDeclSpec;
1648 if (Tok.is(tok::coloncolon)) // ::new or ::delete
1649 goto DoneWithDeclSpec;
1652 case tok::annot_cxxscope: {
1653 if (DS.hasTypeSpecifier())
1654 goto DoneWithDeclSpec;
1657 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
1658 Tok.getAnnotationRange(),
1661 // We are looking for a qualified typename.
1662 Token Next = NextToken();
1663 if (Next.is(tok::annot_template_id) &&
1664 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
1665 ->Kind == TNK_Type_template) {
1666 // We have a qualified template-id, e.g., N::A<int>
1668 // C++ [class.qual]p2:
1669 // In a lookup in which the constructor is an acceptable lookup
1670 // result and the nested-name-specifier nominates a class C:
1672 // - if the name specified after the
1673 // nested-name-specifier, when looked up in C, is the
1674 // injected-class-name of C (Clause 9), or
1676 // - if the name specified after the nested-name-specifier
1677 // is the same as the identifier or the
1678 // simple-template-id's template-name in the last
1679 // component of the nested-name-specifier,
1681 // the name is instead considered to name the constructor of
1684 // Thus, if the template-name is actually the constructor
1685 // name, then the code is ill-formed; this interpretation is
1686 // reinforced by the NAD status of core issue 635.
1687 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
1688 if ((DSContext == DSC_top_level ||
1689 (DSContext == DSC_class && DS.isFriendSpecified())) &&
1691 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
1692 if (isConstructorDeclarator()) {
1693 // The user meant this to be an out-of-line constructor
1694 // definition, but template arguments are not allowed
1695 // there. Just allow this as a constructor; we'll
1696 // complain about it later.
1697 goto DoneWithDeclSpec;
1700 // The user meant this to name a type, but it actually names
1701 // a constructor with some extraneous template
1702 // arguments. Complain, then parse it as a type as the user
1704 Diag(TemplateId->TemplateNameLoc,
1705 diag::err_out_of_line_template_id_names_constructor)
1706 << TemplateId->Name;
1709 DS.getTypeSpecScope() = SS;
1710 ConsumeToken(); // The C++ scope.
1711 assert(Tok.is(tok::annot_template_id) &&
1712 "ParseOptionalCXXScopeSpecifier not working");
1713 AnnotateTemplateIdTokenAsType();
1717 if (Next.is(tok::annot_typename)) {
1718 DS.getTypeSpecScope() = SS;
1719 ConsumeToken(); // The C++ scope.
1720 if (Tok.getAnnotationValue()) {
1721 ParsedType T = getTypeAnnotation(Tok);
1722 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
1723 Tok.getAnnotationEndLoc(),
1724 PrevSpec, DiagID, T);
1727 DS.SetTypeSpecError();
1728 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1729 ConsumeToken(); // The typename
1732 if (Next.isNot(tok::identifier))
1733 goto DoneWithDeclSpec;
1735 // If we're in a context where the identifier could be a class name,
1736 // check whether this is a constructor declaration.
1737 if ((DSContext == DSC_top_level ||
1738 (DSContext == DSC_class && DS.isFriendSpecified())) &&
1739 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
1741 if (isConstructorDeclarator())
1742 goto DoneWithDeclSpec;
1744 // As noted in C++ [class.qual]p2 (cited above), when the name
1745 // of the class is qualified in a context where it could name
1746 // a constructor, its a constructor name. However, we've
1747 // looked at the declarator, and the user probably meant this
1748 // to be a type. Complain that it isn't supposed to be treated
1749 // as a type, then proceed to parse it as a type.
1750 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor)
1751 << Next.getIdentifierInfo();
1754 ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(),
1757 false, false, ParsedType(),
1758 /*NonTrivialSourceInfo=*/true);
1760 // If the referenced identifier is not a type, then this declspec is
1761 // erroneous: We already checked about that it has no type specifier, and
1762 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
1765 ConsumeToken(); // Eat the scope spec so the identifier is current.
1766 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue;
1767 goto DoneWithDeclSpec;
1770 DS.getTypeSpecScope() = SS;
1771 ConsumeToken(); // The C++ scope.
1773 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
1778 DS.SetRangeEnd(Tok.getLocation());
1779 ConsumeToken(); // The typename.
1784 case tok::annot_typename: {
1785 if (Tok.getAnnotationValue()) {
1786 ParsedType T = getTypeAnnotation(Tok);
1787 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
1790 DS.SetTypeSpecError();
1795 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1796 ConsumeToken(); // The typename
1798 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
1799 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
1800 // Objective-C interface.
1801 if (Tok.is(tok::less) && getLang().ObjC1)
1802 ParseObjCProtocolQualifiers(DS);
1807 case tok::kw___is_signed:
1808 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
1809 // typically treats it as a trait. If we see __is_signed as it appears
1810 // in libstdc++, e.g.,
1812 // static const bool __is_signed;
1814 // then treat __is_signed as an identifier rather than as a keyword.
1815 if (DS.getTypeSpecType() == TST_bool &&
1816 DS.getTypeQualifiers() == DeclSpec::TQ_const &&
1817 DS.getStorageClassSpec() == DeclSpec::SCS_static) {
1818 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier();
1819 Tok.setKind(tok::identifier);
1822 // We're done with the declaration-specifiers.
1823 goto DoneWithDeclSpec;
1826 case tok::identifier: {
1827 // In C++, check to see if this is a scope specifier like foo::bar::, if
1828 // so handle it as such. This is important for ctor parsing.
1829 if (getLang().CPlusPlus) {
1830 if (TryAnnotateCXXScopeToken(true)) {
1831 if (!DS.hasTypeSpecifier())
1832 DS.SetTypeSpecError();
1833 goto DoneWithDeclSpec;
1835 if (!Tok.is(tok::identifier))
1839 // This identifier can only be a typedef name if we haven't already seen
1840 // a type-specifier. Without this check we misparse:
1841 // typedef int X; struct Y { short X; }; as 'short int'.
1842 if (DS.hasTypeSpecifier())
1843 goto DoneWithDeclSpec;
1845 // Check for need to substitute AltiVec keyword tokens.
1846 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
1849 // It has to be available as a typedef too!
1850 ParsedType TypeRep =
1851 Actions.getTypeName(*Tok.getIdentifierInfo(),
1852 Tok.getLocation(), getCurScope());
1854 // If this is not a typedef name, don't parse it as part of the declspec,
1855 // it must be an implicit int or an error.
1857 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue;
1858 goto DoneWithDeclSpec;
1861 // If we're in a context where the identifier could be a class name,
1862 // check whether this is a constructor declaration.
1863 if (getLang().CPlusPlus && DSContext == DSC_class &&
1864 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
1865 isConstructorDeclarator())
1866 goto DoneWithDeclSpec;
1868 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
1873 DS.SetRangeEnd(Tok.getLocation());
1874 ConsumeToken(); // The identifier
1876 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
1877 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
1878 // Objective-C interface.
1879 if (Tok.is(tok::less) && getLang().ObjC1)
1880 ParseObjCProtocolQualifiers(DS);
1882 // Need to support trailing type qualifiers (e.g. "id<p> const").
1883 // If a type specifier follows, it will be diagnosed elsewhere.
1888 case tok::annot_template_id: {
1889 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1890 if (TemplateId->Kind != TNK_Type_template) {
1891 // This template-id does not refer to a type name, so we're
1892 // done with the type-specifiers.
1893 goto DoneWithDeclSpec;
1896 // If we're in a context where the template-id could be a
1897 // constructor name or specialization, check whether this is a
1898 // constructor declaration.
1899 if (getLang().CPlusPlus && DSContext == DSC_class &&
1900 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
1901 isConstructorDeclarator())
1902 goto DoneWithDeclSpec;
1904 // Turn the template-id annotation token into a type annotation
1905 // token, then try again to parse it as a type-specifier.
1906 AnnotateTemplateIdTokenAsType();
1910 // GNU attributes support.
1911 case tok::kw___attribute:
1912 ParseGNUAttributes(DS.getAttributes());
1915 // Microsoft declspec support.
1916 case tok::kw___declspec:
1917 ParseMicrosoftDeclSpec(DS.getAttributes());
1920 // Microsoft single token adornments.
1921 case tok::kw___forceinline:
1922 // FIXME: Add handling here!
1925 case tok::kw___ptr64:
1926 case tok::kw___ptr32:
1928 case tok::kw___cdecl:
1929 case tok::kw___stdcall:
1930 case tok::kw___fastcall:
1931 case tok::kw___thiscall:
1932 case tok::kw___unaligned:
1933 ParseMicrosoftTypeAttributes(DS.getAttributes());
1936 // Borland single token adornments.
1937 case tok::kw___pascal:
1938 ParseBorlandTypeAttributes(DS.getAttributes());
1941 // OpenCL single token adornments.
1942 case tok::kw___kernel:
1943 ParseOpenCLAttributes(DS.getAttributes());
1946 // storage-class-specifier
1947 case tok::kw_typedef:
1948 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
1951 case tok::kw_extern:
1952 if (DS.isThreadSpecified())
1953 Diag(Tok, diag::ext_thread_before) << "extern";
1954 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
1957 case tok::kw___private_extern__:
1958 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
1959 Loc, PrevSpec, DiagID);
1961 case tok::kw_static:
1962 if (DS.isThreadSpecified())
1963 Diag(Tok, diag::ext_thread_before) << "static";
1964 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
1968 if (getLang().CPlusPlus0x) {
1969 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
1970 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
1973 Diag(Tok, diag::ext_auto_storage_class)
1974 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
1976 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
1979 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
1982 case tok::kw_register:
1983 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
1986 case tok::kw_mutable:
1987 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
1990 case tok::kw___thread:
1991 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID);
1994 // function-specifier
1995 case tok::kw_inline:
1996 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID);
1998 case tok::kw_virtual:
1999 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID);
2001 case tok::kw_explicit:
2002 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID);
2005 // alignment-specifier
2006 case tok::kw__Alignas:
2008 Diag(Tok, diag::ext_c1x_alignas);
2009 ParseAlignmentSpecifier(DS.getAttributes());
2013 case tok::kw_friend:
2014 if (DSContext == DSC_class)
2015 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
2017 PrevSpec = ""; // not actually used by the diagnostic
2018 DiagID = diag::err_friend_invalid_in_context;
2024 case tok::kw___module_private__:
2025 isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
2029 case tok::kw_constexpr:
2030 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID);
2035 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
2039 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
2040 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
2043 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
2046 case tok::kw___int64:
2047 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
2050 case tok::kw_signed:
2051 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
2054 case tok::kw_unsigned:
2055 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
2058 case tok::kw__Complex:
2059 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
2062 case tok::kw__Imaginary:
2063 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
2067 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
2071 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
2075 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
2079 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
2083 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
2086 case tok::kw_double:
2087 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
2090 case tok::kw_wchar_t:
2091 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
2094 case tok::kw_char16_t:
2095 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
2098 case tok::kw_char32_t:
2099 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
2104 if (Tok.is(tok::kw_bool) &&
2105 DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
2106 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
2107 PrevSpec = ""; // Not used by the diagnostic.
2108 DiagID = diag::err_bool_redeclaration;
2109 // For better error recovery.
2110 Tok.setKind(tok::identifier);
2113 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
2117 case tok::kw__Decimal32:
2118 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
2121 case tok::kw__Decimal64:
2122 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
2125 case tok::kw__Decimal128:
2126 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
2129 case tok::kw___vector:
2130 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
2132 case tok::kw___pixel:
2133 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID);
2135 case tok::kw___unknown_anytype:
2136 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
2142 case tok::kw_struct:
2143 case tok::kw_union: {
2144 tok::TokenKind Kind = Tok.getKind();
2146 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS);
2153 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS);
2158 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
2161 case tok::kw_volatile:
2162 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
2165 case tok::kw_restrict:
2166 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
2170 // C++ typename-specifier:
2171 case tok::kw_typename:
2172 if (TryAnnotateTypeOrScopeToken()) {
2173 DS.SetTypeSpecError();
2174 goto DoneWithDeclSpec;
2176 if (!Tok.is(tok::kw_typename))
2180 // GNU typeof support.
2181 case tok::kw_typeof:
2182 ParseTypeofSpecifier(DS);
2185 case tok::kw_decltype:
2186 ParseDecltypeSpecifier(DS);
2189 case tok::kw___underlying_type:
2190 ParseUnderlyingTypeSpecifier(DS);
2193 case tok::kw__Atomic:
2194 ParseAtomicSpecifier(DS);
2197 // OpenCL qualifiers:
2198 case tok::kw_private:
2199 if (!getLang().OpenCL)
2200 goto DoneWithDeclSpec;
2201 case tok::kw___private:
2202 case tok::kw___global:
2203 case tok::kw___local:
2204 case tok::kw___constant:
2205 case tok::kw___read_only:
2206 case tok::kw___write_only:
2207 case tok::kw___read_write:
2208 ParseOpenCLQualifiers(DS);
2212 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
2213 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
2214 // but we support it.
2215 if (DS.hasTypeSpecifier() || !getLang().ObjC1)
2216 goto DoneWithDeclSpec;
2218 if (!ParseObjCProtocolQualifiers(DS))
2219 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
2220 << FixItHint::CreateInsertion(Loc, "id")
2221 << SourceRange(Loc, DS.getSourceRange().getEnd());
2223 // Need to support trailing type qualifiers (e.g. "id<p> const").
2224 // If a type specifier follows, it will be diagnosed elsewhere.
2227 // If the specifier wasn't legal, issue a diagnostic.
2229 assert(PrevSpec && "Method did not return previous specifier!");
2232 if (DiagID == diag::ext_duplicate_declspec)
2234 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation());
2236 Diag(Tok, DiagID) << PrevSpec;
2239 DS.SetRangeEnd(Tok.getLocation());
2240 if (DiagID != diag::err_bool_redeclaration)
2245 /// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We
2246 /// primarily follow the C++ grammar with additions for C99 and GNU,
2247 /// which together subsume the C grammar. Note that the C++
2248 /// type-specifier also includes the C type-qualifier (for const,
2249 /// volatile, and C99 restrict). Returns true if a type-specifier was
2250 /// found (and parsed), false otherwise.
2252 /// type-specifier: [C++ 7.1.5]
2253 /// simple-type-specifier
2256 /// elaborated-type-specifier [TODO]
2259 /// cv-qualifier: [C++ 7.1.5.1]
2262 /// [C99] 'restrict'
2264 /// simple-type-specifier: [ C++ 7.1.5.2]
2265 /// '::'[opt] nested-name-specifier[opt] type-name [TODO]
2266 /// '::'[opt] nested-name-specifier 'template' template-id [TODO]
2279 /// [C99] '_Complex'
2280 /// [C99] '_Imaginary' // Removed in TC2?
2281 /// [GNU] '_Decimal32'
2282 /// [GNU] '_Decimal64'
2283 /// [GNU] '_Decimal128'
2284 /// [GNU] typeof-specifier
2285 /// [OBJC] class-name objc-protocol-refs[opt] [TODO]
2286 /// [OBJC] typedef-name objc-protocol-refs[opt] [TODO]
2287 /// [C++0x] 'decltype' ( expression )
2288 /// [AltiVec] '__vector'
2289 bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid,
2290 const char *&PrevSpec,
2292 const ParsedTemplateInfo &TemplateInfo,
2293 bool SuppressDeclarations) {
2294 SourceLocation Loc = Tok.getLocation();
2296 switch (Tok.getKind()) {
2297 case tok::identifier: // foo::bar
2298 // If we already have a type specifier, this identifier is not a type.
2299 if (DS.getTypeSpecType() != DeclSpec::TST_unspecified ||
2300 DS.getTypeSpecWidth() != DeclSpec::TSW_unspecified ||
2301 DS.getTypeSpecSign() != DeclSpec::TSS_unspecified)
2303 // Check for need to substitute AltiVec keyword tokens.
2304 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
2307 case tok::kw_typename: // typename foo::bar
2308 // Annotate typenames and C++ scope specifiers. If we get one, just
2309 // recurse to handle whatever we get.
2310 if (TryAnnotateTypeOrScopeToken(/*EnteringContext=*/false,
2313 if (Tok.is(tok::identifier))
2315 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
2316 TemplateInfo, SuppressDeclarations);
2317 case tok::coloncolon: // ::foo::bar
2318 if (NextToken().is(tok::kw_new) || // ::new
2319 NextToken().is(tok::kw_delete)) // ::delete
2322 // Annotate typenames and C++ scope specifiers. If we get one, just
2323 // recurse to handle whatever we get.
2324 if (TryAnnotateTypeOrScopeToken(/*EnteringContext=*/false,
2327 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
2328 TemplateInfo, SuppressDeclarations);
2330 // simple-type-specifier:
2331 case tok::annot_typename: {
2332 if (ParsedType T = getTypeAnnotation(Tok)) {
2333 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
2334 Tok.getAnnotationEndLoc(), PrevSpec,
2337 DS.SetTypeSpecError();
2338 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
2339 ConsumeToken(); // The typename
2341 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
2342 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
2343 // Objective-C interface. If we don't have Objective-C or a '<', this is
2344 // just a normal reference to a typedef name.
2345 if (Tok.is(tok::less) && getLang().ObjC1)
2346 ParseObjCProtocolQualifiers(DS);
2352 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID);
2355 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
2356 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
2359 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
2362 case tok::kw___int64:
2363 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
2366 case tok::kw_signed:
2367 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID);
2369 case tok::kw_unsigned:
2370 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
2373 case tok::kw__Complex:
2374 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
2377 case tok::kw__Imaginary:
2378 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
2382 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID);
2385 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID);
2388 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID);
2391 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec, DiagID);
2394 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID);
2396 case tok::kw_double:
2397 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID);
2399 case tok::kw_wchar_t:
2400 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID);
2402 case tok::kw_char16_t:
2403 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID);
2405 case tok::kw_char32_t:
2406 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID);
2410 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID);
2412 case tok::kw__Decimal32:
2413 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
2416 case tok::kw__Decimal64:
2417 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
2420 case tok::kw__Decimal128:
2421 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
2424 case tok::kw___vector:
2425 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
2427 case tok::kw___pixel:
2428 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID);
2433 case tok::kw_struct:
2434 case tok::kw_union: {
2435 tok::TokenKind Kind = Tok.getKind();
2437 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS_none,
2438 SuppressDeclarations);
2445 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS_none);
2450 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec,
2453 case tok::kw_volatile:
2454 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
2457 case tok::kw_restrict:
2458 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
2462 // GNU typeof support.
2463 case tok::kw_typeof:
2464 ParseTypeofSpecifier(DS);
2467 // C++0x decltype support.
2468 case tok::kw_decltype:
2469 ParseDecltypeSpecifier(DS);
2472 // C++0x type traits support.
2473 case tok::kw___underlying_type:
2474 ParseUnderlyingTypeSpecifier(DS);
2477 case tok::kw__Atomic:
2478 ParseAtomicSpecifier(DS);
2481 // OpenCL qualifiers:
2482 case tok::kw_private:
2483 if (!getLang().OpenCL)
2485 case tok::kw___private:
2486 case tok::kw___global:
2487 case tok::kw___local:
2488 case tok::kw___constant:
2489 case tok::kw___read_only:
2490 case tok::kw___write_only:
2491 case tok::kw___read_write:
2492 ParseOpenCLQualifiers(DS);
2495 // C++0x auto support.
2497 // This is only called in situations where a storage-class specifier is
2498 // illegal, so we can assume an auto type specifier was intended even in
2499 // C++98. In C++98 mode, DeclSpec::Finish will produce an appropriate
2500 // extension diagnostic.
2501 if (!getLang().CPlusPlus)
2504 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID);
2507 case tok::kw___ptr64:
2508 case tok::kw___ptr32:
2510 case tok::kw___cdecl:
2511 case tok::kw___stdcall:
2512 case tok::kw___fastcall:
2513 case tok::kw___thiscall:
2514 case tok::kw___unaligned:
2515 ParseMicrosoftTypeAttributes(DS.getAttributes());
2518 case tok::kw___pascal:
2519 ParseBorlandTypeAttributes(DS.getAttributes());
2523 // Not a type-specifier; do nothing.
2527 // If the specifier combination wasn't legal, issue a diagnostic.
2529 assert(PrevSpec && "Method did not return previous specifier!");
2530 // Pick between error or extwarn.
2531 Diag(Tok, DiagID) << PrevSpec;
2533 DS.SetRangeEnd(Tok.getLocation());
2534 ConsumeToken(); // whatever we parsed above.
2538 /// ParseStructDeclaration - Parse a struct declaration without the terminating
2541 /// struct-declaration:
2542 /// specifier-qualifier-list struct-declarator-list
2543 /// [GNU] __extension__ struct-declaration
2544 /// [GNU] specifier-qualifier-list
2545 /// struct-declarator-list:
2546 /// struct-declarator
2547 /// struct-declarator-list ',' struct-declarator
2548 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
2549 /// struct-declarator:
2551 /// [GNU] declarator attributes[opt]
2552 /// declarator[opt] ':' constant-expression
2553 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
2556 ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) {
2558 if (Tok.is(tok::kw___extension__)) {
2559 // __extension__ silences extension warnings in the subexpression.
2560 ExtensionRAIIObject O(Diags); // Use RAII to do this.
2562 return ParseStructDeclaration(DS, Fields);
2565 // Parse the common specifier-qualifiers-list piece.
2566 ParseSpecifierQualifierList(DS);
2568 // If there are no declarators, this is a free-standing declaration
2569 // specifier. Let the actions module cope with it.
2570 if (Tok.is(tok::semi)) {
2571 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, DS);
2575 // Read struct-declarators until we find the semicolon.
2576 bool FirstDeclarator = true;
2578 ParsingDeclRAIIObject PD(*this);
2579 FieldDeclarator DeclaratorInfo(DS);
2581 // Attributes are only allowed here on successive declarators.
2582 if (!FirstDeclarator)
2583 MaybeParseGNUAttributes(DeclaratorInfo.D);
2585 /// struct-declarator: declarator
2586 /// struct-declarator: declarator[opt] ':' constant-expression
2587 if (Tok.isNot(tok::colon)) {
2588 // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
2589 ColonProtectionRAIIObject X(*this);
2590 ParseDeclarator(DeclaratorInfo.D);
2593 if (Tok.is(tok::colon)) {
2595 ExprResult Res(ParseConstantExpression());
2596 if (Res.isInvalid())
2597 SkipUntil(tok::semi, true, true);
2599 DeclaratorInfo.BitfieldSize = Res.release();
2602 // If attributes exist after the declarator, parse them.
2603 MaybeParseGNUAttributes(DeclaratorInfo.D);
2605 // We're done with this declarator; invoke the callback.
2606 Decl *D = Fields.invoke(DeclaratorInfo);
2609 // If we don't have a comma, it is either the end of the list (a ';')
2610 // or an error, bail out.
2611 if (Tok.isNot(tok::comma))
2614 // Consume the comma.
2617 FirstDeclarator = false;
2621 /// ParseStructUnionBody
2622 /// struct-contents:
2623 /// struct-declaration-list
2625 /// [GNU] "struct-declaration-list" without terminatoring ';'
2626 /// struct-declaration-list:
2627 /// struct-declaration
2628 /// struct-declaration-list struct-declaration
2629 /// [OBC] '@' 'defs' '(' class-name ')'
2631 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
2632 unsigned TagType, Decl *TagDecl) {
2633 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
2634 "parsing struct/union body");
2636 BalancedDelimiterTracker T(*this, tok::l_brace);
2637 if (T.consumeOpen())
2640 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
2641 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
2643 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in
2645 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
2646 Diag(Tok, diag::ext_empty_struct_union)
2647 << (TagType == TST_union);
2649 SmallVector<Decl *, 32> FieldDecls;
2651 // While we still have something to read, read the declarations in the struct.
2652 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
2653 // Each iteration of this loop reads one struct-declaration.
2655 // Check for extraneous top-level semicolon.
2656 if (Tok.is(tok::semi)) {
2657 Diag(Tok, diag::ext_extra_struct_semi)
2658 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType)
2659 << FixItHint::CreateRemoval(Tok.getLocation());
2664 // Parse all the comma separated declarators.
2665 DeclSpec DS(AttrFactory);
2667 if (!Tok.is(tok::at)) {
2668 struct CFieldCallback : FieldCallback {
2671 SmallVectorImpl<Decl *> &FieldDecls;
2673 CFieldCallback(Parser &P, Decl *TagDecl,
2674 SmallVectorImpl<Decl *> &FieldDecls) :
2675 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {}
2677 virtual Decl *invoke(FieldDeclarator &FD) {
2678 // Install the declarator into the current TagDecl.
2679 Decl *Field = P.Actions.ActOnField(P.getCurScope(), TagDecl,
2680 FD.D.getDeclSpec().getSourceRange().getBegin(),
2681 FD.D, FD.BitfieldSize);
2682 FieldDecls.push_back(Field);
2685 } Callback(*this, TagDecl, FieldDecls);
2687 ParseStructDeclaration(DS, Callback);
2688 } else { // Handle @defs
2690 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
2691 Diag(Tok, diag::err_unexpected_at);
2692 SkipUntil(tok::semi, true);
2696 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen);
2697 if (!Tok.is(tok::identifier)) {
2698 Diag(Tok, diag::err_expected_ident);
2699 SkipUntil(tok::semi, true);
2702 SmallVector<Decl *, 16> Fields;
2703 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
2704 Tok.getIdentifierInfo(), Fields);
2705 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
2707 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen);
2710 if (Tok.is(tok::semi)) {
2712 } else if (Tok.is(tok::r_brace)) {
2713 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
2716 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
2717 // Skip to end of block or statement to avoid ext-warning on extra ';'.
2718 SkipUntil(tok::r_brace, true, true);
2719 // If we stopped at a ';', eat it.
2720 if (Tok.is(tok::semi)) ConsumeToken();
2726 ParsedAttributes attrs(AttrFactory);
2727 // If attributes exist after struct contents, parse them.
2728 MaybeParseGNUAttributes(attrs);
2730 Actions.ActOnFields(getCurScope(),
2731 RecordLoc, TagDecl, FieldDecls,
2732 T.getOpenLocation(), T.getCloseLocation(),
2735 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl,
2736 T.getCloseLocation());
2739 /// ParseEnumSpecifier
2740 /// enum-specifier: [C99 6.7.2.2]
2741 /// 'enum' identifier[opt] '{' enumerator-list '}'
2742 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
2743 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
2744 /// '}' attributes[opt]
2745 /// 'enum' identifier
2746 /// [GNU] 'enum' attributes[opt] identifier
2748 /// [C++0x] enum-head '{' enumerator-list[opt] '}'
2749 /// [C++0x] enum-head '{' enumerator-list ',' '}'
2751 /// enum-head: [C++0x]
2752 /// enum-key attributes[opt] identifier[opt] enum-base[opt]
2753 /// enum-key attributes[opt] nested-name-specifier identifier enum-base[opt]
2755 /// enum-key: [C++0x]
2760 /// enum-base: [C++0x]
2761 /// ':' type-specifier-seq
2763 /// [C++] elaborated-type-specifier:
2764 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
2766 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
2767 const ParsedTemplateInfo &TemplateInfo,
2768 AccessSpecifier AS) {
2769 // Parse the tag portion of this.
2770 if (Tok.is(tok::code_completion)) {
2771 // Code completion for an enum name.
2772 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
2773 return cutOffParsing();
2776 bool IsScopedEnum = false;
2777 bool IsScopedUsingClassTag = false;
2779 if (getLang().CPlusPlus0x &&
2780 (Tok.is(tok::kw_class) || Tok.is(tok::kw_struct))) {
2781 IsScopedEnum = true;
2782 IsScopedUsingClassTag = Tok.is(tok::kw_class);
2786 // If attributes exist after tag, parse them.
2787 ParsedAttributes attrs(AttrFactory);
2788 MaybeParseGNUAttributes(attrs);
2790 bool AllowFixedUnderlyingType
2791 = getLang().CPlusPlus0x || getLang().MicrosoftExt || getLang().ObjC2;
2793 CXXScopeSpec &SS = DS.getTypeSpecScope();
2794 if (getLang().CPlusPlus) {
2795 // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
2796 // if a fixed underlying type is allowed.
2797 ColonProtectionRAIIObject X(*this, AllowFixedUnderlyingType);
2799 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false))
2802 if (SS.isSet() && Tok.isNot(tok::identifier)) {
2803 Diag(Tok, diag::err_expected_ident);
2804 if (Tok.isNot(tok::l_brace)) {
2805 // Has no name and is not a definition.
2806 // Skip the rest of this declarator, up until the comma or semicolon.
2807 SkipUntil(tok::comma, true);
2813 // Must have either 'enum name' or 'enum {...}'.
2814 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
2815 (AllowFixedUnderlyingType && Tok.isNot(tok::colon))) {
2816 Diag(Tok, diag::err_expected_ident_lbrace);
2818 // Skip the rest of this declarator, up until the comma or semicolon.
2819 SkipUntil(tok::comma, true);
2823 // If an identifier is present, consume and remember it.
2824 IdentifierInfo *Name = 0;
2825 SourceLocation NameLoc;
2826 if (Tok.is(tok::identifier)) {
2827 Name = Tok.getIdentifierInfo();
2828 NameLoc = ConsumeToken();
2831 if (!Name && IsScopedEnum) {
2832 // C++0x 7.2p2: The optional identifier shall not be omitted in the
2833 // declaration of a scoped enumeration.
2834 Diag(Tok, diag::err_scoped_enum_missing_identifier);
2835 IsScopedEnum = false;
2836 IsScopedUsingClassTag = false;
2839 TypeResult BaseType;
2841 // Parse the fixed underlying type.
2842 if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
2843 bool PossibleBitfield = false;
2844 if (getCurScope()->getFlags() & Scope::ClassScope) {
2845 // If we're in class scope, this can either be an enum declaration with
2846 // an underlying type, or a declaration of a bitfield member. We try to
2847 // use a simple disambiguation scheme first to catch the common cases
2848 // (integer literal, sizeof); if it's still ambiguous, we then consider
2849 // anything that's a simple-type-specifier followed by '(' as an
2850 // expression. This suffices because function types are not valid
2851 // underlying types anyway.
2852 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
2853 // If the next token starts an expression, we know we're parsing a
2854 // bit-field. This is the common case.
2855 if (TPR == TPResult::True())
2856 PossibleBitfield = true;
2857 // If the next token starts a type-specifier-seq, it may be either a
2858 // a fixed underlying type or the start of a function-style cast in C++;
2859 // lookahead one more token to see if it's obvious that we have a
2860 // fixed underlying type.
2861 else if (TPR == TPResult::False() &&
2862 GetLookAheadToken(2).getKind() == tok::semi) {
2866 // We have the start of a type-specifier-seq, so we have to perform
2867 // tentative parsing to determine whether we have an expression or a
2869 TentativeParsingAction TPA(*this);
2874 if ((getLang().CPlusPlus &&
2875 isCXXDeclarationSpecifier() != TPResult::True()) ||
2876 (!getLang().CPlusPlus && !isDeclarationSpecifier(true))) {
2877 // We'll parse this as a bitfield later.
2878 PossibleBitfield = true;
2881 // We have a type-specifier-seq.
2890 if (!PossibleBitfield) {
2892 BaseType = ParseTypeName(&Range);
2894 if (!getLang().CPlusPlus0x && !getLang().ObjC2)
2895 Diag(StartLoc, diag::ext_ms_enum_fixed_underlying_type)
2900 // There are three options here. If we have 'enum foo;', then this is a
2901 // forward declaration. If we have 'enum foo {...' then this is a
2902 // definition. Otherwise we have something like 'enum foo xyz', a reference.
2904 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
2905 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
2906 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
2908 Sema::TagUseKind TUK;
2909 if (Tok.is(tok::l_brace))
2910 TUK = Sema::TUK_Definition;
2911 else if (Tok.is(tok::semi))
2912 TUK = Sema::TUK_Declaration;
2914 TUK = Sema::TUK_Reference;
2916 // enums cannot be templates, although they can be referenced from a
2918 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
2919 TUK != Sema::TUK_Reference) {
2920 Diag(Tok, diag::err_enum_template);
2922 // Skip the rest of this declarator, up until the comma or semicolon.
2923 SkipUntil(tok::comma, true);
2927 if (!Name && TUK != Sema::TUK_Definition) {
2928 Diag(Tok, diag::err_enumerator_unnamed_no_def);
2930 // Skip the rest of this declarator, up until the comma or semicolon.
2931 SkipUntil(tok::comma, true);
2936 bool IsDependent = false;
2937 const char *PrevSpec = 0;
2939 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK,
2940 StartLoc, SS, Name, NameLoc, attrs.getList(),
2941 AS, DS.getModulePrivateSpecLoc(),
2942 MultiTemplateParamsArg(Actions),
2943 Owned, IsDependent, IsScopedEnum,
2944 IsScopedUsingClassTag, BaseType);
2947 // This enum has a dependent nested-name-specifier. Handle it as a
2950 DS.SetTypeSpecError();
2951 Diag(Tok, diag::err_expected_type_name_after_typename);
2955 TypeResult Type = Actions.ActOnDependentTag(getCurScope(), DeclSpec::TST_enum,
2956 TUK, SS, Name, StartLoc,
2958 if (Type.isInvalid()) {
2959 DS.SetTypeSpecError();
2963 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
2964 NameLoc.isValid() ? NameLoc : StartLoc,
2965 PrevSpec, DiagID, Type.get()))
2966 Diag(StartLoc, DiagID) << PrevSpec;
2972 // The action failed to produce an enumeration tag. If this is a
2973 // definition, consume the entire definition.
2974 if (Tok.is(tok::l_brace)) {
2976 SkipUntil(tok::r_brace);
2979 DS.SetTypeSpecError();
2983 if (Tok.is(tok::l_brace))
2984 ParseEnumBody(StartLoc, TagDecl);
2986 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
2987 NameLoc.isValid() ? NameLoc : StartLoc,
2988 PrevSpec, DiagID, TagDecl, Owned))
2989 Diag(StartLoc, DiagID) << PrevSpec;
2992 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
2993 /// enumerator-list:
2995 /// enumerator-list ',' enumerator
2997 /// enumeration-constant
2998 /// enumeration-constant '=' constant-expression
2999 /// enumeration-constant:
3002 void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
3003 // Enter the scope of the enum body and start the definition.
3004 ParseScope EnumScope(this, Scope::DeclScope);
3005 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
3007 BalancedDelimiterTracker T(*this, tok::l_brace);
3010 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
3011 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
3012 Diag(Tok, diag::error_empty_enum);
3014 SmallVector<Decl *, 32> EnumConstantDecls;
3016 Decl *LastEnumConstDecl = 0;
3018 // Parse the enumerator-list.
3019 while (Tok.is(tok::identifier)) {
3020 IdentifierInfo *Ident = Tok.getIdentifierInfo();
3021 SourceLocation IdentLoc = ConsumeToken();
3023 // If attributes exist after the enumerator, parse them.
3024 ParsedAttributes attrs(AttrFactory);
3025 MaybeParseGNUAttributes(attrs);
3027 SourceLocation EqualLoc;
3028 ExprResult AssignedVal;
3029 if (Tok.is(tok::equal)) {
3030 EqualLoc = ConsumeToken();
3031 AssignedVal = ParseConstantExpression();
3032 if (AssignedVal.isInvalid())
3033 SkipUntil(tok::comma, tok::r_brace, true, true);
3036 // Install the enumerator constant into EnumDecl.
3037 Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl,
3040 attrs.getList(), EqualLoc,
3041 AssignedVal.release());
3042 EnumConstantDecls.push_back(EnumConstDecl);
3043 LastEnumConstDecl = EnumConstDecl;
3045 if (Tok.is(tok::identifier)) {
3046 // We're missing a comma between enumerators.
3047 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
3048 Diag(Loc, diag::err_enumerator_list_missing_comma)
3049 << FixItHint::CreateInsertion(Loc, ", ");
3053 if (Tok.isNot(tok::comma))
3055 SourceLocation CommaLoc = ConsumeToken();
3057 if (Tok.isNot(tok::identifier) &&
3058 !(getLang().C99 || getLang().CPlusPlus0x))
3059 Diag(CommaLoc, diag::ext_enumerator_list_comma)
3060 << getLang().CPlusPlus
3061 << FixItHint::CreateRemoval(CommaLoc);
3067 // If attributes exist after the identifier list, parse them.
3068 ParsedAttributes attrs(AttrFactory);
3069 MaybeParseGNUAttributes(attrs);
3071 Actions.ActOnEnumBody(StartLoc, T.getOpenLocation(), T.getCloseLocation(),
3072 EnumDecl, EnumConstantDecls.data(),
3073 EnumConstantDecls.size(), getCurScope(),
3077 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl,
3078 T.getCloseLocation());
3081 /// isTypeSpecifierQualifier - Return true if the current token could be the
3082 /// start of a type-qualifier-list.
3083 bool Parser::isTypeQualifier() const {
3084 switch (Tok.getKind()) {
3085 default: return false;
3087 // type-qualifier only in OpenCL
3088 case tok::kw_private:
3089 return getLang().OpenCL;
3093 case tok::kw_volatile:
3094 case tok::kw_restrict:
3095 case tok::kw___private:
3096 case tok::kw___local:
3097 case tok::kw___global:
3098 case tok::kw___constant:
3099 case tok::kw___read_only:
3100 case tok::kw___read_write:
3101 case tok::kw___write_only:
3106 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
3107 /// is definitely a type-specifier. Return false if it isn't part of a type
3108 /// specifier or if we're not sure.
3109 bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
3110 switch (Tok.getKind()) {
3111 default: return false;
3115 case tok::kw___int64:
3116 case tok::kw_signed:
3117 case tok::kw_unsigned:
3118 case tok::kw__Complex:
3119 case tok::kw__Imaginary:
3122 case tok::kw_wchar_t:
3123 case tok::kw_char16_t:
3124 case tok::kw_char32_t:
3128 case tok::kw_double:
3131 case tok::kw__Decimal32:
3132 case tok::kw__Decimal64:
3133 case tok::kw__Decimal128:
3134 case tok::kw___vector:
3136 // struct-or-union-specifier (C99) or class-specifier (C++)
3138 case tok::kw_struct:
3144 case tok::annot_typename:
3149 /// isTypeSpecifierQualifier - Return true if the current token could be the
3150 /// start of a specifier-qualifier-list.
3151 bool Parser::isTypeSpecifierQualifier() {
3152 switch (Tok.getKind()) {
3153 default: return false;
3155 case tok::identifier: // foo::bar
3156 if (TryAltiVecVectorToken())
3159 case tok::kw_typename: // typename T::type
3160 // Annotate typenames and C++ scope specifiers. If we get one, just
3161 // recurse to handle whatever we get.
3162 if (TryAnnotateTypeOrScopeToken())
3164 if (Tok.is(tok::identifier))
3166 return isTypeSpecifierQualifier();
3168 case tok::coloncolon: // ::foo::bar
3169 if (NextToken().is(tok::kw_new) || // ::new
3170 NextToken().is(tok::kw_delete)) // ::delete
3173 if (TryAnnotateTypeOrScopeToken())
3175 return isTypeSpecifierQualifier();
3177 // GNU attributes support.
3178 case tok::kw___attribute:
3179 // GNU typeof support.
3180 case tok::kw_typeof:
3185 case tok::kw___int64:
3186 case tok::kw_signed:
3187 case tok::kw_unsigned:
3188 case tok::kw__Complex:
3189 case tok::kw__Imaginary:
3192 case tok::kw_wchar_t:
3193 case tok::kw_char16_t:
3194 case tok::kw_char32_t:
3198 case tok::kw_double:
3201 case tok::kw__Decimal32:
3202 case tok::kw__Decimal64:
3203 case tok::kw__Decimal128:
3204 case tok::kw___vector:
3206 // struct-or-union-specifier (C99) or class-specifier (C++)
3208 case tok::kw_struct:
3215 case tok::kw_volatile:
3216 case tok::kw_restrict:
3219 case tok::annot_typename:
3222 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
3224 return getLang().ObjC1;
3226 case tok::kw___cdecl:
3227 case tok::kw___stdcall:
3228 case tok::kw___fastcall:
3229 case tok::kw___thiscall:
3231 case tok::kw___ptr64:
3232 case tok::kw___ptr32:
3233 case tok::kw___pascal:
3234 case tok::kw___unaligned:
3236 case tok::kw___private:
3237 case tok::kw___local:
3238 case tok::kw___global:
3239 case tok::kw___constant:
3240 case tok::kw___read_only:
3241 case tok::kw___read_write:
3242 case tok::kw___write_only:
3246 case tok::kw_private:
3247 return getLang().OpenCL;
3250 case tok::kw__Atomic:
3255 /// isDeclarationSpecifier() - Return true if the current token is part of a
3256 /// declaration specifier.
3258 /// \param DisambiguatingWithExpression True to indicate that the purpose of
3259 /// this check is to disambiguate between an expression and a declaration.
3260 bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
3261 switch (Tok.getKind()) {
3262 default: return false;
3264 case tok::kw_private:
3265 return getLang().OpenCL;
3267 case tok::identifier: // foo::bar
3268 // Unfortunate hack to support "Class.factoryMethod" notation.
3269 if (getLang().ObjC1 && NextToken().is(tok::period))
3271 if (TryAltiVecVectorToken())
3274 case tok::kw_typename: // typename T::type
3275 // Annotate typenames and C++ scope specifiers. If we get one, just
3276 // recurse to handle whatever we get.
3277 if (TryAnnotateTypeOrScopeToken())
3279 if (Tok.is(tok::identifier))
3282 // If we're in Objective-C and we have an Objective-C class type followed
3283 // by an identifier and then either ':' or ']', in a place where an
3284 // expression is permitted, then this is probably a class message send
3285 // missing the initial '['. In this case, we won't consider this to be
3286 // the start of a declaration.
3287 if (DisambiguatingWithExpression &&
3288 isStartOfObjCClassMessageMissingOpenBracket())
3291 return isDeclarationSpecifier();
3293 case tok::coloncolon: // ::foo::bar
3294 if (NextToken().is(tok::kw_new) || // ::new
3295 NextToken().is(tok::kw_delete)) // ::delete
3298 // Annotate typenames and C++ scope specifiers. If we get one, just
3299 // recurse to handle whatever we get.
3300 if (TryAnnotateTypeOrScopeToken())
3302 return isDeclarationSpecifier();
3304 // storage-class-specifier
3305 case tok::kw_typedef:
3306 case tok::kw_extern:
3307 case tok::kw___private_extern__:
3308 case tok::kw_static:
3310 case tok::kw_register:
3311 case tok::kw___thread:
3314 case tok::kw___module_private__:
3319 case tok::kw___int64:
3320 case tok::kw_signed:
3321 case tok::kw_unsigned:
3322 case tok::kw__Complex:
3323 case tok::kw__Imaginary:
3326 case tok::kw_wchar_t:
3327 case tok::kw_char16_t:
3328 case tok::kw_char32_t:
3333 case tok::kw_double:
3336 case tok::kw__Decimal32:
3337 case tok::kw__Decimal64:
3338 case tok::kw__Decimal128:
3339 case tok::kw___vector:
3341 // struct-or-union-specifier (C99) or class-specifier (C++)
3343 case tok::kw_struct:
3350 case tok::kw_volatile:
3351 case tok::kw_restrict:
3353 // function-specifier
3354 case tok::kw_inline:
3355 case tok::kw_virtual:
3356 case tok::kw_explicit:
3358 // static_assert-declaration
3359 case tok::kw__Static_assert:
3361 // GNU typeof support.
3362 case tok::kw_typeof:
3365 case tok::kw___attribute:
3369 case tok::kw_decltype:
3373 case tok::kw__Atomic:
3376 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
3378 return getLang().ObjC1;
3381 case tok::annot_typename:
3382 return !DisambiguatingWithExpression ||
3383 !isStartOfObjCClassMessageMissingOpenBracket();
3385 case tok::kw___declspec:
3386 case tok::kw___cdecl:
3387 case tok::kw___stdcall:
3388 case tok::kw___fastcall:
3389 case tok::kw___thiscall:
3391 case tok::kw___ptr64:
3392 case tok::kw___ptr32:
3393 case tok::kw___forceinline:
3394 case tok::kw___pascal:
3395 case tok::kw___unaligned:
3397 case tok::kw___private:
3398 case tok::kw___local:
3399 case tok::kw___global:
3400 case tok::kw___constant:
3401 case tok::kw___read_only:
3402 case tok::kw___read_write:
3403 case tok::kw___write_only:
3409 bool Parser::isConstructorDeclarator() {
3410 TentativeParsingAction TPA(*this);
3412 // Parse the C++ scope specifier.
3414 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true)) {
3419 // Parse the constructor name.
3420 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) {
3421 // We already know that we have a constructor name; just consume
3429 // Current class name must be followed by a left parentheses.
3430 if (Tok.isNot(tok::l_paren)) {
3436 // A right parentheses or ellipsis signals that we have a constructor.
3437 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) {
3442 // If we need to, enter the specified scope.
3443 DeclaratorScopeObj DeclScopeObj(*this, SS);
3444 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
3445 DeclScopeObj.EnterDeclaratorScope();
3447 // Optionally skip Microsoft attributes.
3448 ParsedAttributes Attrs(AttrFactory);
3449 MaybeParseMicrosoftAttributes(Attrs);
3451 // Check whether the next token(s) are part of a declaration
3452 // specifier, in which case we have the start of a parameter and,
3453 // therefore, we know that this is a constructor.
3454 bool IsConstructor = isDeclarationSpecifier();
3456 return IsConstructor;
3459 /// ParseTypeQualifierListOpt
3460 /// type-qualifier-list: [C99 6.7.5]
3462 /// [vendor] attributes
3463 /// [ only if VendorAttributesAllowed=true ]
3464 /// type-qualifier-list type-qualifier
3465 /// [vendor] type-qualifier-list attributes
3466 /// [ only if VendorAttributesAllowed=true ]
3467 /// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
3468 /// [ only if CXX0XAttributesAllowed=true ]
3469 /// Note: vendor can be GNU, MS, etc.
3471 void Parser::ParseTypeQualifierListOpt(DeclSpec &DS,
3472 bool VendorAttributesAllowed,
3473 bool CXX0XAttributesAllowed) {
3474 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) {
3475 SourceLocation Loc = Tok.getLocation();
3476 ParsedAttributesWithRange attrs(AttrFactory);
3477 ParseCXX0XAttributes(attrs);
3478 if (CXX0XAttributesAllowed)
3479 DS.takeAttributesFrom(attrs);
3481 Diag(Loc, diag::err_attributes_not_allowed);
3484 SourceLocation EndLoc;
3487 bool isInvalid = false;
3488 const char *PrevSpec = 0;
3489 unsigned DiagID = 0;
3490 SourceLocation Loc = Tok.getLocation();
3492 switch (Tok.getKind()) {
3493 case tok::code_completion:
3494 Actions.CodeCompleteTypeQualifiers(DS);
3495 return cutOffParsing();
3498 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
3501 case tok::kw_volatile:
3502 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
3505 case tok::kw_restrict:
3506 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
3510 // OpenCL qualifiers:
3511 case tok::kw_private:
3512 if (!getLang().OpenCL)
3513 goto DoneWithTypeQuals;
3514 case tok::kw___private:
3515 case tok::kw___global:
3516 case tok::kw___local:
3517 case tok::kw___constant:
3518 case tok::kw___read_only:
3519 case tok::kw___write_only:
3520 case tok::kw___read_write:
3521 ParseOpenCLQualifiers(DS);
3525 case tok::kw___ptr64:
3526 case tok::kw___ptr32:
3527 case tok::kw___cdecl:
3528 case tok::kw___stdcall:
3529 case tok::kw___fastcall:
3530 case tok::kw___thiscall:
3531 case tok::kw___unaligned:
3532 if (VendorAttributesAllowed) {
3533 ParseMicrosoftTypeAttributes(DS.getAttributes());
3536 goto DoneWithTypeQuals;
3537 case tok::kw___pascal:
3538 if (VendorAttributesAllowed) {
3539 ParseBorlandTypeAttributes(DS.getAttributes());
3542 goto DoneWithTypeQuals;
3543 case tok::kw___attribute:
3544 if (VendorAttributesAllowed) {
3545 ParseGNUAttributes(DS.getAttributes());
3546 continue; // do *not* consume the next token!
3548 // otherwise, FALL THROUGH!
3551 // If this is not a type-qualifier token, we're done reading type
3552 // qualifiers. First verify that DeclSpec's are consistent.
3553 DS.Finish(Diags, PP);
3554 if (EndLoc.isValid())
3555 DS.SetRangeEnd(EndLoc);
3559 // If the specifier combination wasn't legal, issue a diagnostic.
3561 assert(PrevSpec && "Method did not return previous specifier!");
3562 Diag(Tok, DiagID) << PrevSpec;
3564 EndLoc = ConsumeToken();
3569 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
3571 void Parser::ParseDeclarator(Declarator &D) {
3572 /// This implements the 'declarator' production in the C grammar, then checks
3573 /// for well-formedness and issues diagnostics.
3574 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
3577 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
3578 /// is parsed by the function passed to it. Pass null, and the direct-declarator
3579 /// isn't parsed at all, making this function effectively parse the C++
3580 /// ptr-operator production.
3582 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
3583 /// [C] pointer[opt] direct-declarator
3584 /// [C++] direct-declarator
3585 /// [C++] ptr-operator declarator
3587 /// pointer: [C99 6.7.5]
3588 /// '*' type-qualifier-list[opt]
3589 /// '*' type-qualifier-list[opt] pointer
3592 /// '*' cv-qualifier-seq[opt]
3595 /// [GNU] '&' restrict[opt] attributes[opt]
3596 /// [GNU?] '&&' restrict[opt] attributes[opt]
3597 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
3598 void Parser::ParseDeclaratorInternal(Declarator &D,
3599 DirectDeclParseFunction DirectDeclParser) {
3600 if (Diags.hasAllExtensionsSilenced())
3603 // C++ member pointers start with a '::' or a nested-name.
3604 // Member pointers get special handling, since there's no place for the
3605 // scope spec in the generic path below.
3606 if (getLang().CPlusPlus &&
3607 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) ||
3608 Tok.is(tok::annot_cxxscope))) {
3610 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true); // ignore fail
3612 if (SS.isNotEmpty()) {
3613 if (Tok.isNot(tok::star)) {
3614 // The scope spec really belongs to the direct-declarator.
3615 D.getCXXScopeSpec() = SS;
3616 if (DirectDeclParser)
3617 (this->*DirectDeclParser)(D);
3621 SourceLocation Loc = ConsumeToken();
3623 DeclSpec DS(AttrFactory);
3624 ParseTypeQualifierListOpt(DS);
3625 D.ExtendWithDeclSpec(DS);
3627 // Recurse to parse whatever is left.
3628 ParseDeclaratorInternal(D, DirectDeclParser);
3630 // Sema will have to catch (syntactically invalid) pointers into global
3631 // scope. It has to catch pointers into namespace scope anyway.
3632 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
3635 /* Don't replace range end. */SourceLocation());
3640 tok::TokenKind Kind = Tok.getKind();
3641 // Not a pointer, C++ reference, or block.
3642 if (Kind != tok::star && Kind != tok::caret &&
3643 (Kind != tok::amp || !getLang().CPlusPlus) &&
3644 // We parse rvalue refs in C++03, because otherwise the errors are scary.
3645 (Kind != tok::ampamp || !getLang().CPlusPlus)) {
3646 if (DirectDeclParser)
3647 (this->*DirectDeclParser)(D);
3651 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
3652 // '&&' -> rvalue reference
3653 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
3656 if (Kind == tok::star || Kind == tok::caret) {
3658 DeclSpec DS(AttrFactory);
3660 ParseTypeQualifierListOpt(DS);
3661 D.ExtendWithDeclSpec(DS);
3663 // Recursively parse the declarator.
3664 ParseDeclaratorInternal(D, DirectDeclParser);
3665 if (Kind == tok::star)
3666 // Remember that we parsed a pointer type, and remember the type-quals.
3667 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
3668 DS.getConstSpecLoc(),
3669 DS.getVolatileSpecLoc(),
3670 DS.getRestrictSpecLoc()),
3674 // Remember that we parsed a Block type, and remember the type-quals.
3675 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
3681 DeclSpec DS(AttrFactory);
3683 // Complain about rvalue references in C++03, but then go on and build
3685 if (Kind == tok::ampamp && !getLang().CPlusPlus0x)
3686 Diag(Loc, diag::ext_rvalue_reference);
3688 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
3689 // cv-qualifiers are introduced through the use of a typedef or of a
3690 // template type argument, in which case the cv-qualifiers are ignored.
3692 // [GNU] Retricted references are allowed.
3693 // [GNU] Attributes on references are allowed.
3694 // [C++0x] Attributes on references are not allowed.
3695 ParseTypeQualifierListOpt(DS, true, false);
3696 D.ExtendWithDeclSpec(DS);
3698 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
3699 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
3700 Diag(DS.getConstSpecLoc(),
3701 diag::err_invalid_reference_qualifier_application) << "const";
3702 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
3703 Diag(DS.getVolatileSpecLoc(),
3704 diag::err_invalid_reference_qualifier_application) << "volatile";
3707 // Recursively parse the declarator.
3708 ParseDeclaratorInternal(D, DirectDeclParser);
3710 if (D.getNumTypeObjects() > 0) {
3711 // C++ [dcl.ref]p4: There shall be no references to references.
3712 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
3713 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
3714 if (const IdentifierInfo *II = D.getIdentifier())
3715 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
3718 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
3721 // Once we've complained about the reference-to-reference, we
3722 // can go ahead and build the (technically ill-formed)
3723 // declarator: reference collapsing will take care of it.
3727 // Remember that we parsed a reference type. It doesn't have type-quals.
3728 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
3735 /// ParseDirectDeclarator
3736 /// direct-declarator: [C99 6.7.5]
3737 /// [C99] identifier
3738 /// '(' declarator ')'
3739 /// [GNU] '(' attributes declarator ')'
3740 /// [C90] direct-declarator '[' constant-expression[opt] ']'
3741 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
3742 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
3743 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
3744 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
3745 /// direct-declarator '(' parameter-type-list ')'
3746 /// direct-declarator '(' identifier-list[opt] ')'
3747 /// [GNU] direct-declarator '(' parameter-forward-declarations
3748 /// parameter-type-list[opt] ')'
3749 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
3750 /// cv-qualifier-seq[opt] exception-specification[opt]
3751 /// [C++] declarator-id
3753 /// declarator-id: [C++ 8]
3754 /// '...'[opt] id-expression
3755 /// '::'[opt] nested-name-specifier[opt] type-name
3757 /// id-expression: [C++ 5.1]
3761 /// unqualified-id: [C++ 5.1]
3763 /// operator-function-id
3764 /// conversion-function-id
3768 void Parser::ParseDirectDeclarator(Declarator &D) {
3769 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
3771 if (getLang().CPlusPlus && D.mayHaveIdentifier()) {
3772 // ParseDeclaratorInternal might already have parsed the scope.
3773 if (D.getCXXScopeSpec().isEmpty()) {
3774 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(), true);
3777 if (D.getCXXScopeSpec().isValid()) {
3778 if (Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
3779 // Change the declaration context for name lookup, until this function
3780 // is exited (and the declarator has been parsed).
3781 DeclScopeObj.EnterDeclaratorScope();
3784 // C++0x [dcl.fct]p14:
3785 // There is a syntactic ambiguity when an ellipsis occurs at the end
3786 // of a parameter-declaration-clause without a preceding comma. In
3787 // this case, the ellipsis is parsed as part of the
3788 // abstract-declarator if the type of the parameter names a template
3789 // parameter pack that has not been expanded; otherwise, it is parsed
3790 // as part of the parameter-declaration-clause.
3791 if (Tok.is(tok::ellipsis) &&
3792 !((D.getContext() == Declarator::PrototypeContext ||
3793 D.getContext() == Declarator::BlockLiteralContext) &&
3794 NextToken().is(tok::r_paren) &&
3795 !Actions.containsUnexpandedParameterPacks(D)))
3796 D.setEllipsisLoc(ConsumeToken());
3798 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) ||
3799 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) {
3800 // We found something that indicates the start of an unqualified-id.
3801 // Parse that unqualified-id.
3802 bool AllowConstructorName;
3803 if (D.getDeclSpec().hasTypeSpecifier())
3804 AllowConstructorName = false;
3805 else if (D.getCXXScopeSpec().isSet())
3806 AllowConstructorName =
3807 (D.getContext() == Declarator::FileContext ||
3808 (D.getContext() == Declarator::MemberContext &&
3809 D.getDeclSpec().isFriendSpecified()));
3811 AllowConstructorName = (D.getContext() == Declarator::MemberContext);
3813 if (ParseUnqualifiedId(D.getCXXScopeSpec(),
3814 /*EnteringContext=*/true,
3815 /*AllowDestructorName=*/true,
3816 AllowConstructorName,
3819 // Once we're past the identifier, if the scope was bad, mark the
3820 // whole declarator bad.
3821 D.getCXXScopeSpec().isInvalid()) {
3822 D.SetIdentifier(0, Tok.getLocation());
3823 D.setInvalidType(true);
3825 // Parsed the unqualified-id; update range information and move along.
3826 if (D.getSourceRange().getBegin().isInvalid())
3827 D.SetRangeBegin(D.getName().getSourceRange().getBegin());
3828 D.SetRangeEnd(D.getName().getSourceRange().getEnd());
3830 goto PastIdentifier;
3832 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
3833 assert(!getLang().CPlusPlus &&
3834 "There's a C++-specific check for tok::identifier above");
3835 assert(Tok.getIdentifierInfo() && "Not an identifier?");
3836 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
3838 goto PastIdentifier;
3841 if (Tok.is(tok::l_paren)) {
3842 // direct-declarator: '(' declarator ')'
3843 // direct-declarator: '(' attributes declarator ')'
3844 // Example: 'char (*X)' or 'int (*XX)(void)'
3845 ParseParenDeclarator(D);
3847 // If the declarator was parenthesized, we entered the declarator
3848 // scope when parsing the parenthesized declarator, then exited
3849 // the scope already. Re-enter the scope, if we need to.
3850 if (D.getCXXScopeSpec().isSet()) {
3851 // If there was an error parsing parenthesized declarator, declarator
3852 // scope may have been enterred before. Don't do it again.
3853 if (!D.isInvalidType() &&
3854 Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
3855 // Change the declaration context for name lookup, until this function
3856 // is exited (and the declarator has been parsed).
3857 DeclScopeObj.EnterDeclaratorScope();
3859 } else if (D.mayOmitIdentifier()) {
3860 // This could be something simple like "int" (in which case the declarator
3861 // portion is empty), if an abstract-declarator is allowed.
3862 D.SetIdentifier(0, Tok.getLocation());
3864 if (D.getContext() == Declarator::MemberContext)
3865 Diag(Tok, diag::err_expected_member_name_or_semi)
3866 << D.getDeclSpec().getSourceRange();
3867 else if (getLang().CPlusPlus)
3868 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus;
3870 Diag(Tok, diag::err_expected_ident_lparen);
3871 D.SetIdentifier(0, Tok.getLocation());
3872 D.setInvalidType(true);
3876 assert(D.isPastIdentifier() &&
3877 "Haven't past the location of the identifier yet?");
3879 // Don't parse attributes unless we have an identifier.
3880 if (D.getIdentifier())
3881 MaybeParseCXX0XAttributes(D);
3884 if (Tok.is(tok::l_paren)) {
3885 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
3886 // In such a case, check if we actually have a function declarator; if it
3887 // is not, the declarator has been fully parsed.
3888 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
3889 // When not in file scope, warn for ambiguous function declarators, just
3890 // in case the author intended it as a variable definition.
3891 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext;
3892 if (!isCXXFunctionDeclarator(warnIfAmbiguous))
3895 ParsedAttributes attrs(AttrFactory);
3896 BalancedDelimiterTracker T(*this, tok::l_paren);
3898 ParseFunctionDeclarator(D, attrs, T);
3899 } else if (Tok.is(tok::l_square)) {
3900 ParseBracketDeclarator(D);
3907 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
3908 /// only called before the identifier, so these are most likely just grouping
3909 /// parens for precedence. If we find that these are actually function
3910 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
3912 /// direct-declarator:
3913 /// '(' declarator ')'
3914 /// [GNU] '(' attributes declarator ')'
3915 /// direct-declarator '(' parameter-type-list ')'
3916 /// direct-declarator '(' identifier-list[opt] ')'
3917 /// [GNU] direct-declarator '(' parameter-forward-declarations
3918 /// parameter-type-list[opt] ')'
3920 void Parser::ParseParenDeclarator(Declarator &D) {
3921 BalancedDelimiterTracker T(*this, tok::l_paren);
3924 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
3926 // Eat any attributes before we look at whether this is a grouping or function
3927 // declarator paren. If this is a grouping paren, the attribute applies to
3928 // the type being built up, for example:
3929 // int (__attribute__(()) *x)(long y)
3930 // If this ends up not being a grouping paren, the attribute applies to the
3931 // first argument, for example:
3932 // int (__attribute__(()) int x)
3933 // In either case, we need to eat any attributes to be able to determine what
3934 // sort of paren this is.
3936 ParsedAttributes attrs(AttrFactory);
3937 bool RequiresArg = false;
3938 if (Tok.is(tok::kw___attribute)) {
3939 ParseGNUAttributes(attrs);
3941 // We require that the argument list (if this is a non-grouping paren) be
3942 // present even if the attribute list was empty.
3945 // Eat any Microsoft extensions.
3946 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) ||
3947 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___fastcall) ||
3948 Tok.is(tok::kw___w64) || Tok.is(tok::kw___ptr64) ||
3949 Tok.is(tok::kw___ptr32) || Tok.is(tok::kw___unaligned)) {
3950 ParseMicrosoftTypeAttributes(attrs);
3952 // Eat any Borland extensions.
3953 if (Tok.is(tok::kw___pascal))
3954 ParseBorlandTypeAttributes(attrs);
3956 // If we haven't past the identifier yet (or where the identifier would be
3957 // stored, if this is an abstract declarator), then this is probably just
3958 // grouping parens. However, if this could be an abstract-declarator, then
3959 // this could also be the start of function arguments (consider 'void()').
3962 if (!D.mayOmitIdentifier()) {
3963 // If this can't be an abstract-declarator, this *must* be a grouping
3964 // paren, because we haven't seen the identifier yet.
3966 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
3967 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...)
3968 isDeclarationSpecifier()) { // 'int(int)' is a function.
3969 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
3970 // considered to be a type, not a K&R identifier-list.
3973 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
3977 // If this is a grouping paren, handle:
3978 // direct-declarator: '(' declarator ')'
3979 // direct-declarator: '(' attributes declarator ')'
3981 bool hadGroupingParens = D.hasGroupingParens();
3982 D.setGroupingParens(true);
3984 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
3987 D.AddTypeInfo(DeclaratorChunk::getParen(T.getOpenLocation(),
3988 T.getCloseLocation()),
3989 attrs, T.getCloseLocation());
3991 D.setGroupingParens(hadGroupingParens);
3995 // Okay, if this wasn't a grouping paren, it must be the start of a function
3996 // argument list. Recognize that this declarator will never have an
3997 // identifier (and remember where it would have been), then call into
3998 // ParseFunctionDeclarator to handle of argument list.
3999 D.SetIdentifier(0, Tok.getLocation());
4001 ParseFunctionDeclarator(D, attrs, T, RequiresArg);
4004 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
4005 /// declarator D up to a paren, which indicates that we are parsing function
4008 /// If attrs is non-null, then the caller parsed those arguments immediately
4009 /// after the open paren - they should be considered to be the first argument of
4010 /// a parameter. If RequiresArg is true, then the first argument of the
4011 /// function is required to be present and required to not be an identifier
4014 /// For C++, after the parameter-list, it also parses cv-qualifier-seq[opt],
4015 /// (C++0x) ref-qualifier[opt], exception-specification[opt], and
4016 /// (C++0x) trailing-return-type[opt].
4018 /// [C++0x] exception-specification:
4019 /// dynamic-exception-specification
4020 /// noexcept-specification
4022 void Parser::ParseFunctionDeclarator(Declarator &D,
4023 ParsedAttributes &attrs,
4024 BalancedDelimiterTracker &Tracker,
4026 // lparen is already consumed!
4027 assert(D.isPastIdentifier() && "Should not call before identifier!");
4029 // This should be true when the function has typed arguments.
4030 // Otherwise, it is treated as a K&R-style function.
4031 bool HasProto = false;
4032 // Build up an array of information about the parsed arguments.
4033 SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
4034 // Remember where we see an ellipsis, if any.
4035 SourceLocation EllipsisLoc;
4037 DeclSpec DS(AttrFactory);
4038 bool RefQualifierIsLValueRef = true;
4039 SourceLocation RefQualifierLoc;
4040 ExceptionSpecificationType ESpecType = EST_None;
4041 SourceRange ESpecRange;
4042 SmallVector<ParsedType, 2> DynamicExceptions;
4043 SmallVector<SourceRange, 2> DynamicExceptionRanges;
4044 ExprResult NoexceptExpr;
4045 ParsedType TrailingReturnType;
4047 SourceLocation EndLoc;
4048 if (isFunctionDeclaratorIdentifierList()) {
4050 Diag(Tok, diag::err_argument_required_after_attribute);
4052 ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
4054 Tracker.consumeClose();
4055 EndLoc = Tracker.getCloseLocation();
4057 // Enter function-declaration scope, limiting any declarators to the
4058 // function prototype scope, including parameter declarators.
4059 ParseScope PrototypeScope(this,
4060 Scope::FunctionPrototypeScope|Scope::DeclScope);
4062 if (Tok.isNot(tok::r_paren))
4063 ParseParameterDeclarationClause(D, attrs, ParamInfo, EllipsisLoc);
4064 else if (RequiresArg)
4065 Diag(Tok, diag::err_argument_required_after_attribute);
4067 HasProto = ParamInfo.size() || getLang().CPlusPlus;
4069 // If we have the closing ')', eat it.
4070 Tracker.consumeClose();
4071 EndLoc = Tracker.getCloseLocation();
4073 if (getLang().CPlusPlus) {
4074 MaybeParseCXX0XAttributes(attrs);
4076 // Parse cv-qualifier-seq[opt].
4077 ParseTypeQualifierListOpt(DS, false /*no attributes*/);
4078 if (!DS.getSourceRange().getEnd().isInvalid())
4079 EndLoc = DS.getSourceRange().getEnd();
4081 // Parse ref-qualifier[opt].
4082 if (Tok.is(tok::amp) || Tok.is(tok::ampamp)) {
4083 if (!getLang().CPlusPlus0x)
4084 Diag(Tok, diag::ext_ref_qualifier);
4086 RefQualifierIsLValueRef = Tok.is(tok::amp);
4087 RefQualifierLoc = ConsumeToken();
4088 EndLoc = RefQualifierLoc;
4091 // Parse exception-specification[opt].
4092 ESpecType = MaybeParseExceptionSpecification(ESpecRange,
4094 DynamicExceptionRanges,
4096 if (ESpecType != EST_None)
4097 EndLoc = ESpecRange.getEnd();
4099 // Parse trailing-return-type[opt].
4100 if (getLang().CPlusPlus0x && Tok.is(tok::arrow)) {
4102 TrailingReturnType = ParseTrailingReturnType(Range).get();
4103 if (Range.getEnd().isValid())
4104 EndLoc = Range.getEnd();
4108 // Leave prototype scope.
4109 PrototypeScope.Exit();
4112 // Remember that we parsed a function type, and remember the attributes.
4113 D.AddTypeInfo(DeclaratorChunk::getFunction(HasProto,
4114 /*isVariadic=*/EllipsisLoc.isValid(),
4116 ParamInfo.data(), ParamInfo.size(),
4117 DS.getTypeQualifiers(),
4118 RefQualifierIsLValueRef,
4120 /*MutableLoc=*/SourceLocation(),
4121 ESpecType, ESpecRange.getBegin(),
4122 DynamicExceptions.data(),
4123 DynamicExceptionRanges.data(),
4124 DynamicExceptions.size(),
4125 NoexceptExpr.isUsable() ?
4126 NoexceptExpr.get() : 0,
4127 Tracker.getOpenLocation(),
4129 TrailingReturnType),
4133 /// isFunctionDeclaratorIdentifierList - This parameter list may have an
4134 /// identifier list form for a K&R-style function: void foo(a,b,c)
4136 /// Note that identifier-lists are only allowed for normal declarators, not for
4137 /// abstract-declarators.
4138 bool Parser::isFunctionDeclaratorIdentifierList() {
4139 return !getLang().CPlusPlus
4140 && Tok.is(tok::identifier)
4141 && !TryAltiVecVectorToken()
4142 // K&R identifier lists can't have typedefs as identifiers, per C99
4144 && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
4145 // Identifier lists follow a really simple grammar: the identifiers can
4146 // be followed *only* by a ", identifier" or ")". However, K&R
4147 // identifier lists are really rare in the brave new modern world, and
4148 // it is very common for someone to typo a type in a non-K&R style
4149 // list. If we are presented with something like: "void foo(intptr x,
4150 // float y)", we don't want to start parsing the function declarator as
4151 // though it is a K&R style declarator just because intptr is an
4154 // To handle this, we check to see if the token after the first
4155 // identifier is a "," or ")". Only then do we parse it as an
4157 && (NextToken().is(tok::comma) || NextToken().is(tok::r_paren));
4160 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
4161 /// we found a K&R-style identifier list instead of a typed parameter list.
4163 /// After returning, ParamInfo will hold the parsed parameters.
4165 /// identifier-list: [C99 6.7.5]
4167 /// identifier-list ',' identifier
4169 void Parser::ParseFunctionDeclaratorIdentifierList(
4171 SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo) {
4172 // If there was no identifier specified for the declarator, either we are in
4173 // an abstract-declarator, or we are in a parameter declarator which was found
4174 // to be abstract. In abstract-declarators, identifier lists are not valid:
4176 if (!D.getIdentifier())
4177 Diag(Tok, diag::ext_ident_list_in_param);
4179 // Maintain an efficient lookup of params we have seen so far.
4180 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
4183 // If this isn't an identifier, report the error and skip until ')'.
4184 if (Tok.isNot(tok::identifier)) {
4185 Diag(Tok, diag::err_expected_ident);
4186 SkipUntil(tok::r_paren, /*StopAtSemi=*/true, /*DontConsume=*/true);
4187 // Forget we parsed anything.
4192 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
4194 // Reject 'typedef int y; int test(x, y)', but continue parsing.
4195 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
4196 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
4198 // Verify that the argument identifier has not already been mentioned.
4199 if (!ParamsSoFar.insert(ParmII)) {
4200 Diag(Tok, diag::err_param_redefinition) << ParmII;
4202 // Remember this identifier in ParamInfo.
4203 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
4208 // Eat the identifier.
4211 // The list continues if we see a comma.
4212 if (Tok.isNot(tok::comma))
4218 /// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
4219 /// after the opening parenthesis. This function will not parse a K&R-style
4220 /// identifier list.
4222 /// D is the declarator being parsed. If attrs is non-null, then the caller
4223 /// parsed those arguments immediately after the open paren - they should be
4224 /// considered to be the first argument of a parameter.
4226 /// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
4227 /// be the location of the ellipsis, if any was parsed.
4229 /// parameter-type-list: [C99 6.7.5]
4231 /// parameter-list ',' '...'
4232 /// [C++] parameter-list '...'
4234 /// parameter-list: [C99 6.7.5]
4235 /// parameter-declaration
4236 /// parameter-list ',' parameter-declaration
4238 /// parameter-declaration: [C99 6.7.5]
4239 /// declaration-specifiers declarator
4240 /// [C++] declaration-specifiers declarator '=' assignment-expression
4241 /// [GNU] declaration-specifiers declarator attributes
4242 /// declaration-specifiers abstract-declarator[opt]
4243 /// [C++] declaration-specifiers abstract-declarator[opt]
4244 /// '=' assignment-expression
4245 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
4247 void Parser::ParseParameterDeclarationClause(
4249 ParsedAttributes &attrs,
4250 SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo,
4251 SourceLocation &EllipsisLoc) {
4254 if (Tok.is(tok::ellipsis)) {
4255 EllipsisLoc = ConsumeToken(); // Consume the ellipsis.
4259 // Parse the declaration-specifiers.
4260 // Just use the ParsingDeclaration "scope" of the declarator.
4261 DeclSpec DS(AttrFactory);
4263 // Skip any Microsoft attributes before a param.
4264 if (getLang().MicrosoftExt && Tok.is(tok::l_square))
4265 ParseMicrosoftAttributes(DS.getAttributes());
4267 SourceLocation DSStart = Tok.getLocation();
4269 // If the caller parsed attributes for the first argument, add them now.
4270 // Take them so that we only apply the attributes to the first parameter.
4271 // FIXME: If we saw an ellipsis first, this code is not reached. Are the
4272 // attributes lost? Should they even be allowed?
4273 // FIXME: If we can leave the attributes in the token stream somehow, we can
4274 // get rid of a parameter (attrs) and this statement. It might be too much
4276 DS.takeAttributesFrom(attrs);
4278 ParseDeclarationSpecifiers(DS);
4280 // Parse the declarator. This is "PrototypeContext", because we must
4281 // accept either 'declarator' or 'abstract-declarator' here.
4282 Declarator ParmDecl(DS, Declarator::PrototypeContext);
4283 ParseDeclarator(ParmDecl);
4285 // Parse GNU attributes, if present.
4286 MaybeParseGNUAttributes(ParmDecl);
4288 // Remember this parsed parameter in ParamInfo.
4289 IdentifierInfo *ParmII = ParmDecl.getIdentifier();
4291 // DefArgToks is used when the parsing of default arguments needs
4293 CachedTokens *DefArgToks = 0;
4295 // If no parameter was specified, verify that *something* was specified,
4296 // otherwise we have a missing type and identifier.
4297 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 &&
4298 ParmDecl.getNumTypeObjects() == 0) {
4299 // Completely missing, emit error.
4300 Diag(DSStart, diag::err_missing_param);
4302 // Otherwise, we have something. Add it and let semantic analysis try
4303 // to grok it and add the result to the ParamInfo we are building.
4305 // Inform the actions module about the parameter declarator, so it gets
4306 // added to the current scope.
4307 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl);
4309 // Parse the default argument, if any. We parse the default
4310 // arguments in all dialects; the semantic analysis in
4311 // ActOnParamDefaultArgument will reject the default argument in
4313 if (Tok.is(tok::equal)) {
4314 SourceLocation EqualLoc = Tok.getLocation();
4316 // Parse the default argument
4317 if (D.getContext() == Declarator::MemberContext) {
4318 // If we're inside a class definition, cache the tokens
4319 // corresponding to the default argument. We'll actually parse
4320 // them when we see the end of the class definition.
4321 // FIXME: Templates will require something similar.
4322 // FIXME: Can we use a smart pointer for Toks?
4323 DefArgToks = new CachedTokens;
4325 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks,
4326 /*StopAtSemi=*/true,
4327 /*ConsumeFinalToken=*/false)) {
4330 Actions.ActOnParamDefaultArgumentError(Param);
4332 // Mark the end of the default argument so that we know when to
4333 // stop when we parse it later on.
4335 DefArgEnd.startToken();
4336 DefArgEnd.setKind(tok::cxx_defaultarg_end);
4337 DefArgEnd.setLocation(Tok.getLocation());
4338 DefArgToks->push_back(DefArgEnd);
4339 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
4340 (*DefArgToks)[1].getLocation());
4346 // The argument isn't actually potentially evaluated unless it is
4348 EnterExpressionEvaluationContext Eval(Actions,
4349 Sema::PotentiallyEvaluatedIfUsed);
4351 ExprResult DefArgResult(ParseAssignmentExpression());
4352 if (DefArgResult.isInvalid()) {
4353 Actions.ActOnParamDefaultArgumentError(Param);
4354 SkipUntil(tok::comma, tok::r_paren, true, true);
4356 // Inform the actions module about the default argument
4357 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
4358 DefArgResult.take());
4363 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
4364 ParmDecl.getIdentifierLoc(), Param,
4368 // If the next token is a comma, consume it and keep reading arguments.
4369 if (Tok.isNot(tok::comma)) {
4370 if (Tok.is(tok::ellipsis)) {
4371 EllipsisLoc = ConsumeToken(); // Consume the ellipsis.
4373 if (!getLang().CPlusPlus) {
4374 // We have ellipsis without a preceding ',', which is ill-formed
4375 // in C. Complain and provide the fix.
4376 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
4377 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
4384 // Consume the comma.
4390 /// [C90] direct-declarator '[' constant-expression[opt] ']'
4391 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
4392 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
4393 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
4394 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
4395 void Parser::ParseBracketDeclarator(Declarator &D) {
4396 BalancedDelimiterTracker T(*this, tok::l_square);
4399 // C array syntax has many features, but by-far the most common is [] and [4].
4400 // This code does a fast path to handle some of the most obvious cases.
4401 if (Tok.getKind() == tok::r_square) {
4403 ParsedAttributes attrs(AttrFactory);
4404 MaybeParseCXX0XAttributes(attrs);
4406 // Remember that we parsed the empty array type.
4407 ExprResult NumElements;
4408 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0,
4409 T.getOpenLocation(),
4410 T.getCloseLocation()),
4411 attrs, T.getCloseLocation());
4413 } else if (Tok.getKind() == tok::numeric_constant &&
4414 GetLookAheadToken(1).is(tok::r_square)) {
4415 // [4] is very common. Parse the numeric constant expression.
4416 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok));
4420 ParsedAttributes attrs(AttrFactory);
4421 MaybeParseCXX0XAttributes(attrs);
4423 // Remember that we parsed a array type, and remember its features.
4424 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0,
4426 T.getOpenLocation(),
4427 T.getCloseLocation()),
4428 attrs, T.getCloseLocation());
4432 // If valid, this location is the position where we read the 'static' keyword.
4433 SourceLocation StaticLoc;
4434 if (Tok.is(tok::kw_static))
4435 StaticLoc = ConsumeToken();
4437 // If there is a type-qualifier-list, read it now.
4438 // Type qualifiers in an array subscript are a C99 feature.
4439 DeclSpec DS(AttrFactory);
4440 ParseTypeQualifierListOpt(DS, false /*no attributes*/);
4442 // If we haven't already read 'static', check to see if there is one after the
4443 // type-qualifier-list.
4444 if (!StaticLoc.isValid() && Tok.is(tok::kw_static))
4445 StaticLoc = ConsumeToken();
4447 // Handle "direct-declarator [ type-qual-list[opt] * ]".
4448 bool isStar = false;
4449 ExprResult NumElements;
4451 // Handle the case where we have '[*]' as the array size. However, a leading
4452 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
4453 // the the token after the star is a ']'. Since stars in arrays are
4454 // infrequent, use of lookahead is not costly here.
4455 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
4456 ConsumeToken(); // Eat the '*'.
4458 if (StaticLoc.isValid()) {
4459 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
4460 StaticLoc = SourceLocation(); // Drop the static.
4463 } else if (Tok.isNot(tok::r_square)) {
4464 // Note, in C89, this production uses the constant-expr production instead
4465 // of assignment-expr. The only difference is that assignment-expr allows
4466 // things like '=' and '*='. Sema rejects these in C89 mode because they
4467 // are not i-c-e's, so we don't need to distinguish between the two here.
4469 // Parse the constant-expression or assignment-expression now (depending
4471 if (getLang().CPlusPlus)
4472 NumElements = ParseConstantExpression();
4474 NumElements = ParseAssignmentExpression();
4477 // If there was an error parsing the assignment-expression, recover.
4478 if (NumElements.isInvalid()) {
4479 D.setInvalidType(true);
4480 // If the expression was invalid, skip it.
4481 SkipUntil(tok::r_square);
4487 ParsedAttributes attrs(AttrFactory);
4488 MaybeParseCXX0XAttributes(attrs);
4490 // Remember that we parsed a array type, and remember its features.
4491 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
4492 StaticLoc.isValid(), isStar,
4493 NumElements.release(),
4494 T.getOpenLocation(),
4495 T.getCloseLocation()),
4496 attrs, T.getCloseLocation());
4499 /// [GNU] typeof-specifier:
4500 /// typeof ( expressions )
4501 /// typeof ( type-name )
4502 /// [GNU/C++] typeof unary-expression
4504 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
4505 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
4507 SourceLocation StartLoc = ConsumeToken();
4509 const bool hasParens = Tok.is(tok::l_paren);
4513 SourceRange CastRange;
4514 ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr,
4517 DS.setTypeofParensRange(CastRange);
4519 if (CastRange.getEnd().isInvalid())
4520 // FIXME: Not accurate, the range gets one token more than it should.
4521 DS.SetRangeEnd(Tok.getLocation());
4523 DS.SetRangeEnd(CastRange.getEnd());
4527 DS.SetTypeSpecError();
4531 const char *PrevSpec = 0;
4533 // Check for duplicate type specifiers (e.g. "int typeof(int)").
4534 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
4536 Diag(StartLoc, DiagID) << PrevSpec;
4540 // If we get here, the operand to the typeof was an expresion.
4541 if (Operand.isInvalid()) {
4542 DS.SetTypeSpecError();
4546 const char *PrevSpec = 0;
4548 // Check for duplicate type specifiers (e.g. "int typeof(int)").
4549 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
4550 DiagID, Operand.get()))
4551 Diag(StartLoc, DiagID) << PrevSpec;
4554 /// [C1X] atomic-specifier:
4555 /// _Atomic ( type-name )
4557 void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
4558 assert(Tok.is(tok::kw__Atomic) && "Not an atomic specifier");
4560 SourceLocation StartLoc = ConsumeToken();
4561 BalancedDelimiterTracker T(*this, tok::l_paren);
4562 if (T.expectAndConsume(diag::err_expected_lparen_after, "_Atomic")) {
4563 SkipUntil(tok::r_paren);
4567 TypeResult Result = ParseTypeName();
4568 if (Result.isInvalid()) {
4569 SkipUntil(tok::r_paren);
4576 if (T.getCloseLocation().isInvalid())
4579 DS.setTypeofParensRange(T.getRange());
4580 DS.SetRangeEnd(T.getCloseLocation());
4582 const char *PrevSpec = 0;
4584 if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
4585 DiagID, Result.release()))
4586 Diag(StartLoc, DiagID) << PrevSpec;
4590 /// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
4591 /// from TryAltiVecVectorToken.
4592 bool Parser::TryAltiVecVectorTokenOutOfLine() {
4593 Token Next = NextToken();
4594 switch (Next.getKind()) {
4595 default: return false;
4598 case tok::kw_signed:
4599 case tok::kw_unsigned:
4604 case tok::kw_double:
4606 case tok::kw___pixel:
4607 Tok.setKind(tok::kw___vector);
4609 case tok::identifier:
4610 if (Next.getIdentifierInfo() == Ident_pixel) {
4611 Tok.setKind(tok::kw___vector);
4618 bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
4619 const char *&PrevSpec, unsigned &DiagID,
4621 if (Tok.getIdentifierInfo() == Ident_vector) {
4622 Token Next = NextToken();
4623 switch (Next.getKind()) {
4626 case tok::kw_signed:
4627 case tok::kw_unsigned:
4632 case tok::kw_double:
4634 case tok::kw___pixel:
4635 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
4637 case tok::identifier:
4638 if (Next.getIdentifierInfo() == Ident_pixel) {
4639 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
4646 } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
4647 DS.isTypeAltiVecVector()) {
4648 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID);