1 //===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Declaration portions of the Parser interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/Basic/AddressSpaces.h"
19 #include "clang/Basic/Attributes.h"
20 #include "clang/Basic/CharInfo.h"
21 #include "clang/Basic/TargetInfo.h"
22 #include "clang/Parse/ParseDiagnostic.h"
23 #include "clang/Sema/Lookup.h"
24 #include "clang/Sema/ParsedTemplate.h"
25 #include "clang/Sema/PrettyDeclStackTrace.h"
26 #include "clang/Sema/Scope.h"
27 #include "llvm/ADT/SmallSet.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/ADT/StringSwitch.h"
30 using namespace clang;
31
32 //===----------------------------------------------------------------------===//
33 // C99 6.7: Declarations.
34 //===----------------------------------------------------------------------===//
35
36 /// ParseTypeName
37 /// type-name: [C99 6.7.6]
38 /// specifier-qualifier-list abstract-declarator[opt]
39 ///
40 /// Called type-id in C++.
ParseTypeName(SourceRange * Range,Declarator::TheContext Context,AccessSpecifier AS,Decl ** OwnedType,ParsedAttributes * Attrs)41 TypeResult Parser::ParseTypeName(SourceRange *Range,
42 Declarator::TheContext Context,
43 AccessSpecifier AS,
44 Decl **OwnedType,
45 ParsedAttributes *Attrs) {
46 DeclSpecContext DSC = getDeclSpecContextFromDeclaratorContext(Context);
47 if (DSC == DSC_normal)
48 DSC = DSC_type_specifier;
49
50 // Parse the common declaration-specifiers piece.
51 DeclSpec DS(AttrFactory);
52 if (Attrs)
53 DS.addAttributes(Attrs->getList());
54 ParseSpecifierQualifierList(DS, AS, DSC);
55 if (OwnedType)
56 *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : nullptr;
57
58 // Parse the abstract-declarator, if present.
59 Declarator DeclaratorInfo(DS, Context);
60 ParseDeclarator(DeclaratorInfo);
61 if (Range)
62 *Range = DeclaratorInfo.getSourceRange();
63
64 if (DeclaratorInfo.isInvalidType())
65 return true;
66
67 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
68 }
69
70
71 /// isAttributeLateParsed - Return true if the attribute has arguments that
72 /// require late parsing.
isAttributeLateParsed(const IdentifierInfo & II)73 static bool isAttributeLateParsed(const IdentifierInfo &II) {
74 #define CLANG_ATTR_LATE_PARSED_LIST
75 return llvm::StringSwitch<bool>(II.getName())
76 #include "clang/Parse/AttrParserStringSwitches.inc"
77 .Default(false);
78 #undef CLANG_ATTR_LATE_PARSED_LIST
79 }
80
81 /// ParseGNUAttributes - Parse a non-empty attributes list.
82 ///
83 /// [GNU] attributes:
84 /// attribute
85 /// attributes attribute
86 ///
87 /// [GNU] attribute:
88 /// '__attribute__' '(' '(' attribute-list ')' ')'
89 ///
90 /// [GNU] attribute-list:
91 /// attrib
92 /// attribute_list ',' attrib
93 ///
94 /// [GNU] attrib:
95 /// empty
96 /// attrib-name
97 /// attrib-name '(' identifier ')'
98 /// attrib-name '(' identifier ',' nonempty-expr-list ')'
99 /// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
100 ///
101 /// [GNU] attrib-name:
102 /// identifier
103 /// typespec
104 /// typequal
105 /// storageclass
106 ///
107 /// Whether an attribute takes an 'identifier' is determined by the
108 /// attrib-name. GCC's behavior here is not worth imitating:
109 ///
110 /// * In C mode, if the attribute argument list starts with an identifier
111 /// followed by a ',' or an ')', and the identifier doesn't resolve to
112 /// a type, it is parsed as an identifier. If the attribute actually
113 /// wanted an expression, it's out of luck (but it turns out that no
114 /// attributes work that way, because C constant expressions are very
115 /// limited).
116 /// * In C++ mode, if the attribute argument list starts with an identifier,
117 /// and the attribute *wants* an identifier, it is parsed as an identifier.
118 /// At block scope, any additional tokens between the identifier and the
119 /// ',' or ')' are ignored, otherwise they produce a parse error.
120 ///
121 /// We follow the C++ model, but don't allow junk after the identifier.
ParseGNUAttributes(ParsedAttributes & attrs,SourceLocation * endLoc,LateParsedAttrList * LateAttrs,Declarator * D)122 void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
123 SourceLocation *endLoc,
124 LateParsedAttrList *LateAttrs,
125 Declarator *D) {
126 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
127
128 while (Tok.is(tok::kw___attribute)) {
129 ConsumeToken();
130 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
131 "attribute")) {
132 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
133 return;
134 }
135 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
136 SkipUntil(tok::r_paren, StopAtSemi); // skip until ) or ;
137 return;
138 }
139 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
140 while (true) {
141 // Allow empty/non-empty attributes. ((__vector_size__(16),,,,))
142 if (TryConsumeToken(tok::comma))
143 continue;
144
145 // Expect an identifier or declaration specifier (const, int, etc.)
146 if (Tok.isAnnotation())
147 break;
148 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
149 if (!AttrName)
150 break;
151
152 SourceLocation AttrNameLoc = ConsumeToken();
153
154 if (Tok.isNot(tok::l_paren)) {
155 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
156 AttributeList::AS_GNU);
157 continue;
158 }
159
160 // Handle "parameterized" attributes
161 if (!LateAttrs || !isAttributeLateParsed(*AttrName)) {
162 ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc, nullptr,
163 SourceLocation(), AttributeList::AS_GNU, D);
164 continue;
165 }
166
167 // Handle attributes with arguments that require late parsing.
168 LateParsedAttribute *LA =
169 new LateParsedAttribute(this, *AttrName, AttrNameLoc);
170 LateAttrs->push_back(LA);
171
172 // Attributes in a class are parsed at the end of the class, along
173 // with other late-parsed declarations.
174 if (!ClassStack.empty() && !LateAttrs->parseSoon())
175 getCurrentClass().LateParsedDeclarations.push_back(LA);
176
177 // consume everything up to and including the matching right parens
178 ConsumeAndStoreUntil(tok::r_paren, LA->Toks, true, false);
179
180 Token Eof;
181 Eof.startToken();
182 Eof.setLocation(Tok.getLocation());
183 LA->Toks.push_back(Eof);
184 }
185
186 if (ExpectAndConsume(tok::r_paren))
187 SkipUntil(tok::r_paren, StopAtSemi);
188 SourceLocation Loc = Tok.getLocation();
189 if (ExpectAndConsume(tok::r_paren))
190 SkipUntil(tok::r_paren, StopAtSemi);
191 if (endLoc)
192 *endLoc = Loc;
193 }
194 }
195
196 /// \brief Normalizes an attribute name by dropping prefixed and suffixed __.
normalizeAttrName(StringRef Name)197 static StringRef normalizeAttrName(StringRef Name) {
198 if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
199 Name = Name.drop_front(2).drop_back(2);
200 return Name;
201 }
202
203 /// \brief Determine whether the given attribute has an identifier argument.
attributeHasIdentifierArg(const IdentifierInfo & II)204 static bool attributeHasIdentifierArg(const IdentifierInfo &II) {
205 #define CLANG_ATTR_IDENTIFIER_ARG_LIST
206 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
207 #include "clang/Parse/AttrParserStringSwitches.inc"
208 .Default(false);
209 #undef CLANG_ATTR_IDENTIFIER_ARG_LIST
210 }
211
212 /// \brief Determine whether the given attribute parses a type argument.
attributeIsTypeArgAttr(const IdentifierInfo & II)213 static bool attributeIsTypeArgAttr(const IdentifierInfo &II) {
214 #define CLANG_ATTR_TYPE_ARG_LIST
215 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
216 #include "clang/Parse/AttrParserStringSwitches.inc"
217 .Default(false);
218 #undef CLANG_ATTR_TYPE_ARG_LIST
219 }
220
221 /// \brief Determine whether the given attribute requires parsing its arguments
222 /// in an unevaluated context or not.
attributeParsedArgsUnevaluated(const IdentifierInfo & II)223 static bool attributeParsedArgsUnevaluated(const IdentifierInfo &II) {
224 #define CLANG_ATTR_ARG_CONTEXT_LIST
225 return llvm::StringSwitch<bool>(normalizeAttrName(II.getName()))
226 #include "clang/Parse/AttrParserStringSwitches.inc"
227 .Default(false);
228 #undef CLANG_ATTR_ARG_CONTEXT_LIST
229 }
230
ParseIdentifierLoc()231 IdentifierLoc *Parser::ParseIdentifierLoc() {
232 assert(Tok.is(tok::identifier) && "expected an identifier");
233 IdentifierLoc *IL = IdentifierLoc::create(Actions.Context,
234 Tok.getLocation(),
235 Tok.getIdentifierInfo());
236 ConsumeToken();
237 return IL;
238 }
239
ParseAttributeWithTypeArg(IdentifierInfo & AttrName,SourceLocation AttrNameLoc,ParsedAttributes & Attrs,SourceLocation * EndLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax)240 void Parser::ParseAttributeWithTypeArg(IdentifierInfo &AttrName,
241 SourceLocation AttrNameLoc,
242 ParsedAttributes &Attrs,
243 SourceLocation *EndLoc,
244 IdentifierInfo *ScopeName,
245 SourceLocation ScopeLoc,
246 AttributeList::Syntax Syntax) {
247 BalancedDelimiterTracker Parens(*this, tok::l_paren);
248 Parens.consumeOpen();
249
250 TypeResult T;
251 if (Tok.isNot(tok::r_paren))
252 T = ParseTypeName();
253
254 if (Parens.consumeClose())
255 return;
256
257 if (T.isInvalid())
258 return;
259
260 if (T.isUsable())
261 Attrs.addNewTypeAttr(&AttrName,
262 SourceRange(AttrNameLoc, Parens.getCloseLocation()),
263 ScopeName, ScopeLoc, T.get(), Syntax);
264 else
265 Attrs.addNew(&AttrName, SourceRange(AttrNameLoc, Parens.getCloseLocation()),
266 ScopeName, ScopeLoc, nullptr, 0, Syntax);
267 }
268
ParseAttributeArgsCommon(IdentifierInfo * AttrName,SourceLocation AttrNameLoc,ParsedAttributes & Attrs,SourceLocation * EndLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax)269 unsigned Parser::ParseAttributeArgsCommon(
270 IdentifierInfo *AttrName, SourceLocation AttrNameLoc,
271 ParsedAttributes &Attrs, SourceLocation *EndLoc, IdentifierInfo *ScopeName,
272 SourceLocation ScopeLoc, AttributeList::Syntax Syntax) {
273 // Ignore the left paren location for now.
274 ConsumeParen();
275
276 ArgsVector ArgExprs;
277 if (Tok.is(tok::identifier)) {
278 // If this attribute wants an 'identifier' argument, make it so.
279 bool IsIdentifierArg = attributeHasIdentifierArg(*AttrName);
280 AttributeList::Kind AttrKind =
281 AttributeList::getKind(AttrName, ScopeName, Syntax);
282
283 // If we don't know how to parse this attribute, but this is the only
284 // token in this argument, assume it's meant to be an identifier.
285 if (AttrKind == AttributeList::UnknownAttribute ||
286 AttrKind == AttributeList::IgnoredAttribute) {
287 const Token &Next = NextToken();
288 IsIdentifierArg = Next.is(tok::r_paren) || Next.is(tok::comma);
289 }
290
291 if (IsIdentifierArg)
292 ArgExprs.push_back(ParseIdentifierLoc());
293 }
294
295 if (!ArgExprs.empty() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren)) {
296 // Eat the comma.
297 if (!ArgExprs.empty())
298 ConsumeToken();
299
300 // Parse the non-empty comma-separated list of expressions.
301 do {
302 std::unique_ptr<EnterExpressionEvaluationContext> Unevaluated;
303 if (attributeParsedArgsUnevaluated(*AttrName))
304 Unevaluated.reset(
305 new EnterExpressionEvaluationContext(Actions, Sema::Unevaluated));
306
307 ExprResult ArgExpr(
308 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
309 if (ArgExpr.isInvalid()) {
310 SkipUntil(tok::r_paren, StopAtSemi);
311 return 0;
312 }
313 ArgExprs.push_back(ArgExpr.get());
314 // Eat the comma, move to the next argument
315 } while (TryConsumeToken(tok::comma));
316 }
317
318 SourceLocation RParen = Tok.getLocation();
319 if (!ExpectAndConsume(tok::r_paren)) {
320 SourceLocation AttrLoc = ScopeLoc.isValid() ? ScopeLoc : AttrNameLoc;
321 Attrs.addNew(AttrName, SourceRange(AttrLoc, RParen), ScopeName, ScopeLoc,
322 ArgExprs.data(), ArgExprs.size(), Syntax);
323 }
324
325 if (EndLoc)
326 *EndLoc = RParen;
327
328 return static_cast<unsigned>(ArgExprs.size());
329 }
330
331 /// Parse the arguments to a parameterized GNU attribute or
332 /// a C++11 attribute in "gnu" namespace.
ParseGNUAttributeArgs(IdentifierInfo * AttrName,SourceLocation AttrNameLoc,ParsedAttributes & Attrs,SourceLocation * EndLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax,Declarator * D)333 void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
334 SourceLocation AttrNameLoc,
335 ParsedAttributes &Attrs,
336 SourceLocation *EndLoc,
337 IdentifierInfo *ScopeName,
338 SourceLocation ScopeLoc,
339 AttributeList::Syntax Syntax,
340 Declarator *D) {
341
342 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
343
344 AttributeList::Kind AttrKind =
345 AttributeList::getKind(AttrName, ScopeName, Syntax);
346
347 if (AttrKind == AttributeList::AT_Availability) {
348 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
349 ScopeLoc, Syntax);
350 return;
351 } else if (AttrKind == AttributeList::AT_ObjCBridgeRelated) {
352 ParseObjCBridgeRelatedAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
353 ScopeName, ScopeLoc, Syntax);
354 return;
355 } else if (AttrKind == AttributeList::AT_TypeTagForDatatype) {
356 ParseTypeTagForDatatypeAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc,
357 ScopeName, ScopeLoc, Syntax);
358 return;
359 } else if (attributeIsTypeArgAttr(*AttrName)) {
360 ParseAttributeWithTypeArg(*AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
361 ScopeLoc, Syntax);
362 return;
363 }
364
365 // These may refer to the function arguments, but need to be parsed early to
366 // participate in determining whether it's a redeclaration.
367 std::unique_ptr<ParseScope> PrototypeScope;
368 if (AttrName->isStr("enable_if") && D && D->isFunctionDeclarator()) {
369 DeclaratorChunk::FunctionTypeInfo FTI = D->getFunctionTypeInfo();
370 PrototypeScope.reset(new ParseScope(this, Scope::FunctionPrototypeScope |
371 Scope::FunctionDeclarationScope |
372 Scope::DeclScope));
373 for (unsigned i = 0; i != FTI.NumParams; ++i) {
374 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
375 Actions.ActOnReenterCXXMethodParameter(getCurScope(), Param);
376 }
377 }
378
379 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
380 ScopeLoc, Syntax);
381 }
382
ParseMicrosoftDeclSpecArgs(IdentifierInfo * AttrName,SourceLocation AttrNameLoc,ParsedAttributes & Attrs)383 bool Parser::ParseMicrosoftDeclSpecArgs(IdentifierInfo *AttrName,
384 SourceLocation AttrNameLoc,
385 ParsedAttributes &Attrs) {
386 // If the attribute isn't known, we will not attempt to parse any
387 // arguments.
388 if (!hasAttribute(AttrSyntax::Declspec, nullptr, AttrName,
389 getTargetInfo().getTriple(), getLangOpts())) {
390 // Eat the left paren, then skip to the ending right paren.
391 ConsumeParen();
392 SkipUntil(tok::r_paren);
393 return false;
394 }
395
396 SourceLocation OpenParenLoc = Tok.getLocation();
397
398 if (AttrName->getName() == "property") {
399 // The property declspec is more complex in that it can take one or two
400 // assignment expressions as a parameter, but the lhs of the assignment
401 // must be named get or put.
402
403 BalancedDelimiterTracker T(*this, tok::l_paren);
404 T.expectAndConsume(diag::err_expected_lparen_after,
405 AttrName->getNameStart(), tok::r_paren);
406
407 enum AccessorKind {
408 AK_Invalid = -1,
409 AK_Put = 0,
410 AK_Get = 1 // indices into AccessorNames
411 };
412 IdentifierInfo *AccessorNames[] = {nullptr, nullptr};
413 bool HasInvalidAccessor = false;
414
415 // Parse the accessor specifications.
416 while (true) {
417 // Stop if this doesn't look like an accessor spec.
418 if (!Tok.is(tok::identifier)) {
419 // If the user wrote a completely empty list, use a special diagnostic.
420 if (Tok.is(tok::r_paren) && !HasInvalidAccessor &&
421 AccessorNames[AK_Put] == nullptr &&
422 AccessorNames[AK_Get] == nullptr) {
423 Diag(AttrNameLoc, diag::err_ms_property_no_getter_or_putter);
424 break;
425 }
426
427 Diag(Tok.getLocation(), diag::err_ms_property_unknown_accessor);
428 break;
429 }
430
431 AccessorKind Kind;
432 SourceLocation KindLoc = Tok.getLocation();
433 StringRef KindStr = Tok.getIdentifierInfo()->getName();
434 if (KindStr == "get") {
435 Kind = AK_Get;
436 } else if (KindStr == "put") {
437 Kind = AK_Put;
438
439 // Recover from the common mistake of using 'set' instead of 'put'.
440 } else if (KindStr == "set") {
441 Diag(KindLoc, diag::err_ms_property_has_set_accessor)
442 << FixItHint::CreateReplacement(KindLoc, "put");
443 Kind = AK_Put;
444
445 // Handle the mistake of forgetting the accessor kind by skipping
446 // this accessor.
447 } else if (NextToken().is(tok::comma) || NextToken().is(tok::r_paren)) {
448 Diag(KindLoc, diag::err_ms_property_missing_accessor_kind);
449 ConsumeToken();
450 HasInvalidAccessor = true;
451 goto next_property_accessor;
452
453 // Otherwise, complain about the unknown accessor kind.
454 } else {
455 Diag(KindLoc, diag::err_ms_property_unknown_accessor);
456 HasInvalidAccessor = true;
457 Kind = AK_Invalid;
458
459 // Try to keep parsing unless it doesn't look like an accessor spec.
460 if (!NextToken().is(tok::equal))
461 break;
462 }
463
464 // Consume the identifier.
465 ConsumeToken();
466
467 // Consume the '='.
468 if (!TryConsumeToken(tok::equal)) {
469 Diag(Tok.getLocation(), diag::err_ms_property_expected_equal)
470 << KindStr;
471 break;
472 }
473
474 // Expect the method name.
475 if (!Tok.is(tok::identifier)) {
476 Diag(Tok.getLocation(), diag::err_ms_property_expected_accessor_name);
477 break;
478 }
479
480 if (Kind == AK_Invalid) {
481 // Just drop invalid accessors.
482 } else if (AccessorNames[Kind] != nullptr) {
483 // Complain about the repeated accessor, ignore it, and keep parsing.
484 Diag(KindLoc, diag::err_ms_property_duplicate_accessor) << KindStr;
485 } else {
486 AccessorNames[Kind] = Tok.getIdentifierInfo();
487 }
488 ConsumeToken();
489
490 next_property_accessor:
491 // Keep processing accessors until we run out.
492 if (TryConsumeToken(tok::comma))
493 continue;
494
495 // If we run into the ')', stop without consuming it.
496 if (Tok.is(tok::r_paren))
497 break;
498
499 Diag(Tok.getLocation(), diag::err_ms_property_expected_comma_or_rparen);
500 break;
501 }
502
503 // Only add the property attribute if it was well-formed.
504 if (!HasInvalidAccessor)
505 Attrs.addNewPropertyAttr(AttrName, AttrNameLoc, nullptr, SourceLocation(),
506 AccessorNames[AK_Get], AccessorNames[AK_Put],
507 AttributeList::AS_Declspec);
508 T.skipToEnd();
509 return !HasInvalidAccessor;
510 }
511
512 unsigned NumArgs =
513 ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, nullptr, nullptr,
514 SourceLocation(), AttributeList::AS_Declspec);
515
516 // If this attribute's args were parsed, and it was expected to have
517 // arguments but none were provided, emit a diagnostic.
518 const AttributeList *Attr = Attrs.getList();
519 if (Attr && Attr->getMaxArgs() && !NumArgs) {
520 Diag(OpenParenLoc, diag::err_attribute_requires_arguments) << AttrName;
521 return false;
522 }
523 return true;
524 }
525
526 /// [MS] decl-specifier:
527 /// __declspec ( extended-decl-modifier-seq )
528 ///
529 /// [MS] extended-decl-modifier-seq:
530 /// extended-decl-modifier[opt]
531 /// extended-decl-modifier extended-decl-modifier-seq
ParseMicrosoftDeclSpec(ParsedAttributes & Attrs)532 void Parser::ParseMicrosoftDeclSpec(ParsedAttributes &Attrs) {
533 assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
534
535 ConsumeToken();
536 BalancedDelimiterTracker T(*this, tok::l_paren);
537 if (T.expectAndConsume(diag::err_expected_lparen_after, "__declspec",
538 tok::r_paren))
539 return;
540
541 // An empty declspec is perfectly legal and should not warn. Additionally,
542 // you can specify multiple attributes per declspec.
543 while (Tok.isNot(tok::r_paren)) {
544 // Attribute not present.
545 if (TryConsumeToken(tok::comma))
546 continue;
547
548 // We expect either a well-known identifier or a generic string. Anything
549 // else is a malformed declspec.
550 bool IsString = Tok.getKind() == tok::string_literal ? true : false;
551 if (!IsString && Tok.getKind() != tok::identifier &&
552 Tok.getKind() != tok::kw_restrict) {
553 Diag(Tok, diag::err_ms_declspec_type);
554 T.skipToEnd();
555 return;
556 }
557
558 IdentifierInfo *AttrName;
559 SourceLocation AttrNameLoc;
560 if (IsString) {
561 SmallString<8> StrBuffer;
562 bool Invalid = false;
563 StringRef Str = PP.getSpelling(Tok, StrBuffer, &Invalid);
564 if (Invalid) {
565 T.skipToEnd();
566 return;
567 }
568 AttrName = PP.getIdentifierInfo(Str);
569 AttrNameLoc = ConsumeStringToken();
570 } else {
571 AttrName = Tok.getIdentifierInfo();
572 AttrNameLoc = ConsumeToken();
573 }
574
575 bool AttrHandled = false;
576
577 // Parse attribute arguments.
578 if (Tok.is(tok::l_paren))
579 AttrHandled = ParseMicrosoftDeclSpecArgs(AttrName, AttrNameLoc, Attrs);
580 else if (AttrName->getName() == "property")
581 // The property attribute must have an argument list.
582 Diag(Tok.getLocation(), diag::err_expected_lparen_after)
583 << AttrName->getName();
584
585 if (!AttrHandled)
586 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
587 AttributeList::AS_Declspec);
588 }
589 T.consumeClose();
590 }
591
ParseMicrosoftTypeAttributes(ParsedAttributes & attrs)592 void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
593 // Treat these like attributes
594 while (true) {
595 switch (Tok.getKind()) {
596 case tok::kw___fastcall:
597 case tok::kw___stdcall:
598 case tok::kw___thiscall:
599 case tok::kw___cdecl:
600 case tok::kw___vectorcall:
601 case tok::kw___ptr64:
602 case tok::kw___w64:
603 case tok::kw___ptr32:
604 case tok::kw___unaligned:
605 case tok::kw___sptr:
606 case tok::kw___uptr: {
607 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
608 SourceLocation AttrNameLoc = ConsumeToken();
609 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
610 AttributeList::AS_Keyword);
611 break;
612 }
613 default:
614 return;
615 }
616 }
617 }
618
DiagnoseAndSkipExtendedMicrosoftTypeAttributes()619 void Parser::DiagnoseAndSkipExtendedMicrosoftTypeAttributes() {
620 SourceLocation StartLoc = Tok.getLocation();
621 SourceLocation EndLoc = SkipExtendedMicrosoftTypeAttributes();
622
623 if (EndLoc.isValid()) {
624 SourceRange Range(StartLoc, EndLoc);
625 Diag(StartLoc, diag::warn_microsoft_qualifiers_ignored) << Range;
626 }
627 }
628
SkipExtendedMicrosoftTypeAttributes()629 SourceLocation Parser::SkipExtendedMicrosoftTypeAttributes() {
630 SourceLocation EndLoc;
631
632 while (true) {
633 switch (Tok.getKind()) {
634 case tok::kw_const:
635 case tok::kw_volatile:
636 case tok::kw___fastcall:
637 case tok::kw___stdcall:
638 case tok::kw___thiscall:
639 case tok::kw___cdecl:
640 case tok::kw___vectorcall:
641 case tok::kw___ptr32:
642 case tok::kw___ptr64:
643 case tok::kw___w64:
644 case tok::kw___unaligned:
645 case tok::kw___sptr:
646 case tok::kw___uptr:
647 EndLoc = ConsumeToken();
648 break;
649 default:
650 return EndLoc;
651 }
652 }
653 }
654
ParseBorlandTypeAttributes(ParsedAttributes & attrs)655 void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
656 // Treat these like attributes
657 while (Tok.is(tok::kw___pascal)) {
658 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
659 SourceLocation AttrNameLoc = ConsumeToken();
660 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
661 AttributeList::AS_Keyword);
662 }
663 }
664
ParseOpenCLAttributes(ParsedAttributes & attrs)665 void Parser::ParseOpenCLAttributes(ParsedAttributes &attrs) {
666 // Treat these like attributes
667 while (Tok.is(tok::kw___kernel)) {
668 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
669 SourceLocation AttrNameLoc = ConsumeToken();
670 attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
671 AttributeList::AS_Keyword);
672 }
673 }
674
ParseOpenCLQualifiers(ParsedAttributes & Attrs)675 void Parser::ParseOpenCLQualifiers(ParsedAttributes &Attrs) {
676 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
677 SourceLocation AttrNameLoc = Tok.getLocation();
678 Attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
679 AttributeList::AS_Keyword);
680 }
681
VersionNumberSeparator(const char Separator)682 static bool VersionNumberSeparator(const char Separator) {
683 return (Separator == '.' || Separator == '_');
684 }
685
686 /// \brief Parse a version number.
687 ///
688 /// version:
689 /// simple-integer
690 /// simple-integer ',' simple-integer
691 /// simple-integer ',' simple-integer ',' simple-integer
ParseVersionTuple(SourceRange & Range)692 VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
693 Range = Tok.getLocation();
694
695 if (!Tok.is(tok::numeric_constant)) {
696 Diag(Tok, diag::err_expected_version);
697 SkipUntil(tok::comma, tok::r_paren,
698 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
699 return VersionTuple();
700 }
701
702 // Parse the major (and possibly minor and subminor) versions, which
703 // are stored in the numeric constant. We utilize a quirk of the
704 // lexer, which is that it handles something like 1.2.3 as a single
705 // numeric constant, rather than two separate tokens.
706 SmallString<512> Buffer;
707 Buffer.resize(Tok.getLength()+1);
708 const char *ThisTokBegin = &Buffer[0];
709
710 // Get the spelling of the token, which eliminates trigraphs, etc.
711 bool Invalid = false;
712 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
713 if (Invalid)
714 return VersionTuple();
715
716 // Parse the major version.
717 unsigned AfterMajor = 0;
718 unsigned Major = 0;
719 while (AfterMajor < ActualLength && isDigit(ThisTokBegin[AfterMajor])) {
720 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
721 ++AfterMajor;
722 }
723
724 if (AfterMajor == 0) {
725 Diag(Tok, diag::err_expected_version);
726 SkipUntil(tok::comma, tok::r_paren,
727 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
728 return VersionTuple();
729 }
730
731 if (AfterMajor == ActualLength) {
732 ConsumeToken();
733
734 // We only had a single version component.
735 if (Major == 0) {
736 Diag(Tok, diag::err_zero_version);
737 return VersionTuple();
738 }
739
740 return VersionTuple(Major);
741 }
742
743 const char AfterMajorSeparator = ThisTokBegin[AfterMajor];
744 if (!VersionNumberSeparator(AfterMajorSeparator)
745 || (AfterMajor + 1 == ActualLength)) {
746 Diag(Tok, diag::err_expected_version);
747 SkipUntil(tok::comma, tok::r_paren,
748 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
749 return VersionTuple();
750 }
751
752 // Parse the minor version.
753 unsigned AfterMinor = AfterMajor + 1;
754 unsigned Minor = 0;
755 while (AfterMinor < ActualLength && isDigit(ThisTokBegin[AfterMinor])) {
756 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
757 ++AfterMinor;
758 }
759
760 if (AfterMinor == ActualLength) {
761 ConsumeToken();
762
763 // We had major.minor.
764 if (Major == 0 && Minor == 0) {
765 Diag(Tok, diag::err_zero_version);
766 return VersionTuple();
767 }
768
769 return VersionTuple(Major, Minor, (AfterMajorSeparator == '_'));
770 }
771
772 const char AfterMinorSeparator = ThisTokBegin[AfterMinor];
773 // If what follows is not a '.' or '_', we have a problem.
774 if (!VersionNumberSeparator(AfterMinorSeparator)) {
775 Diag(Tok, diag::err_expected_version);
776 SkipUntil(tok::comma, tok::r_paren,
777 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
778 return VersionTuple();
779 }
780
781 // Warn if separators, be it '.' or '_', do not match.
782 if (AfterMajorSeparator != AfterMinorSeparator)
783 Diag(Tok, diag::warn_expected_consistent_version_separator);
784
785 // Parse the subminor version.
786 unsigned AfterSubminor = AfterMinor + 1;
787 unsigned Subminor = 0;
788 while (AfterSubminor < ActualLength && isDigit(ThisTokBegin[AfterSubminor])) {
789 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
790 ++AfterSubminor;
791 }
792
793 if (AfterSubminor != ActualLength) {
794 Diag(Tok, diag::err_expected_version);
795 SkipUntil(tok::comma, tok::r_paren,
796 StopAtSemi | StopBeforeMatch | StopAtCodeCompletion);
797 return VersionTuple();
798 }
799 ConsumeToken();
800 return VersionTuple(Major, Minor, Subminor, (AfterMajorSeparator == '_'));
801 }
802
803 /// \brief Parse the contents of the "availability" attribute.
804 ///
805 /// availability-attribute:
806 /// 'availability' '(' platform ',' version-arg-list, opt-message')'
807 ///
808 /// platform:
809 /// identifier
810 ///
811 /// version-arg-list:
812 /// version-arg
813 /// version-arg ',' version-arg-list
814 ///
815 /// version-arg:
816 /// 'introduced' '=' version
817 /// 'deprecated' '=' version
818 /// 'obsoleted' = version
819 /// 'unavailable'
820 /// opt-message:
821 /// 'message' '=' <string>
ParseAvailabilityAttribute(IdentifierInfo & Availability,SourceLocation AvailabilityLoc,ParsedAttributes & attrs,SourceLocation * endLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax)822 void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
823 SourceLocation AvailabilityLoc,
824 ParsedAttributes &attrs,
825 SourceLocation *endLoc,
826 IdentifierInfo *ScopeName,
827 SourceLocation ScopeLoc,
828 AttributeList::Syntax Syntax) {
829 enum { Introduced, Deprecated, Obsoleted, Unknown };
830 AvailabilityChange Changes[Unknown];
831 ExprResult MessageExpr;
832
833 // Opening '('.
834 BalancedDelimiterTracker T(*this, tok::l_paren);
835 if (T.consumeOpen()) {
836 Diag(Tok, diag::err_expected) << tok::l_paren;
837 return;
838 }
839
840 // Parse the platform name,
841 if (Tok.isNot(tok::identifier)) {
842 Diag(Tok, diag::err_availability_expected_platform);
843 SkipUntil(tok::r_paren, StopAtSemi);
844 return;
845 }
846 IdentifierLoc *Platform = ParseIdentifierLoc();
847
848 // Parse the ',' following the platform name.
849 if (ExpectAndConsume(tok::comma)) {
850 SkipUntil(tok::r_paren, StopAtSemi);
851 return;
852 }
853
854 // If we haven't grabbed the pointers for the identifiers
855 // "introduced", "deprecated", and "obsoleted", do so now.
856 if (!Ident_introduced) {
857 Ident_introduced = PP.getIdentifierInfo("introduced");
858 Ident_deprecated = PP.getIdentifierInfo("deprecated");
859 Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
860 Ident_unavailable = PP.getIdentifierInfo("unavailable");
861 Ident_message = PP.getIdentifierInfo("message");
862 }
863
864 // Parse the set of introductions/deprecations/removals.
865 SourceLocation UnavailableLoc;
866 do {
867 if (Tok.isNot(tok::identifier)) {
868 Diag(Tok, diag::err_availability_expected_change);
869 SkipUntil(tok::r_paren, StopAtSemi);
870 return;
871 }
872 IdentifierInfo *Keyword = Tok.getIdentifierInfo();
873 SourceLocation KeywordLoc = ConsumeToken();
874
875 if (Keyword == Ident_unavailable) {
876 if (UnavailableLoc.isValid()) {
877 Diag(KeywordLoc, diag::err_availability_redundant)
878 << Keyword << SourceRange(UnavailableLoc);
879 }
880 UnavailableLoc = KeywordLoc;
881 continue;
882 }
883
884 if (Tok.isNot(tok::equal)) {
885 Diag(Tok, diag::err_expected_after) << Keyword << tok::equal;
886 SkipUntil(tok::r_paren, StopAtSemi);
887 return;
888 }
889 ConsumeToken();
890 if (Keyword == Ident_message) {
891 if (Tok.isNot(tok::string_literal)) {
892 Diag(Tok, diag::err_expected_string_literal)
893 << /*Source='availability attribute'*/2;
894 SkipUntil(tok::r_paren, StopAtSemi);
895 return;
896 }
897 MessageExpr = ParseStringLiteralExpression();
898 // Also reject wide string literals.
899 if (StringLiteral *MessageStringLiteral =
900 cast_or_null<StringLiteral>(MessageExpr.get())) {
901 if (MessageStringLiteral->getCharByteWidth() != 1) {
902 Diag(MessageStringLiteral->getSourceRange().getBegin(),
903 diag::err_expected_string_literal)
904 << /*Source='availability attribute'*/ 2;
905 SkipUntil(tok::r_paren, StopAtSemi);
906 return;
907 }
908 }
909 break;
910 }
911
912 // Special handling of 'NA' only when applied to introduced or
913 // deprecated.
914 if ((Keyword == Ident_introduced || Keyword == Ident_deprecated) &&
915 Tok.is(tok::identifier)) {
916 IdentifierInfo *NA = Tok.getIdentifierInfo();
917 if (NA->getName() == "NA") {
918 ConsumeToken();
919 if (Keyword == Ident_introduced)
920 UnavailableLoc = KeywordLoc;
921 continue;
922 }
923 }
924
925 SourceRange VersionRange;
926 VersionTuple Version = ParseVersionTuple(VersionRange);
927
928 if (Version.empty()) {
929 SkipUntil(tok::r_paren, StopAtSemi);
930 return;
931 }
932
933 unsigned Index;
934 if (Keyword == Ident_introduced)
935 Index = Introduced;
936 else if (Keyword == Ident_deprecated)
937 Index = Deprecated;
938 else if (Keyword == Ident_obsoleted)
939 Index = Obsoleted;
940 else
941 Index = Unknown;
942
943 if (Index < Unknown) {
944 if (!Changes[Index].KeywordLoc.isInvalid()) {
945 Diag(KeywordLoc, diag::err_availability_redundant)
946 << Keyword
947 << SourceRange(Changes[Index].KeywordLoc,
948 Changes[Index].VersionRange.getEnd());
949 }
950
951 Changes[Index].KeywordLoc = KeywordLoc;
952 Changes[Index].Version = Version;
953 Changes[Index].VersionRange = VersionRange;
954 } else {
955 Diag(KeywordLoc, diag::err_availability_unknown_change)
956 << Keyword << VersionRange;
957 }
958
959 } while (TryConsumeToken(tok::comma));
960
961 // Closing ')'.
962 if (T.consumeClose())
963 return;
964
965 if (endLoc)
966 *endLoc = T.getCloseLocation();
967
968 // The 'unavailable' availability cannot be combined with any other
969 // availability changes. Make sure that hasn't happened.
970 if (UnavailableLoc.isValid()) {
971 bool Complained = false;
972 for (unsigned Index = Introduced; Index != Unknown; ++Index) {
973 if (Changes[Index].KeywordLoc.isValid()) {
974 if (!Complained) {
975 Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
976 << SourceRange(Changes[Index].KeywordLoc,
977 Changes[Index].VersionRange.getEnd());
978 Complained = true;
979 }
980
981 // Clear out the availability.
982 Changes[Index] = AvailabilityChange();
983 }
984 }
985 }
986
987 // Record this attribute
988 attrs.addNew(&Availability,
989 SourceRange(AvailabilityLoc, T.getCloseLocation()),
990 ScopeName, ScopeLoc,
991 Platform,
992 Changes[Introduced],
993 Changes[Deprecated],
994 Changes[Obsoleted],
995 UnavailableLoc, MessageExpr.get(),
996 Syntax);
997 }
998
999 /// \brief Parse the contents of the "objc_bridge_related" attribute.
1000 /// objc_bridge_related '(' related_class ',' opt-class_method ',' opt-instance_method ')'
1001 /// related_class:
1002 /// Identifier
1003 ///
1004 /// opt-class_method:
1005 /// Identifier: | <empty>
1006 ///
1007 /// opt-instance_method:
1008 /// Identifier | <empty>
1009 ///
ParseObjCBridgeRelatedAttribute(IdentifierInfo & ObjCBridgeRelated,SourceLocation ObjCBridgeRelatedLoc,ParsedAttributes & attrs,SourceLocation * endLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax)1010 void Parser::ParseObjCBridgeRelatedAttribute(IdentifierInfo &ObjCBridgeRelated,
1011 SourceLocation ObjCBridgeRelatedLoc,
1012 ParsedAttributes &attrs,
1013 SourceLocation *endLoc,
1014 IdentifierInfo *ScopeName,
1015 SourceLocation ScopeLoc,
1016 AttributeList::Syntax Syntax) {
1017 // Opening '('.
1018 BalancedDelimiterTracker T(*this, tok::l_paren);
1019 if (T.consumeOpen()) {
1020 Diag(Tok, diag::err_expected) << tok::l_paren;
1021 return;
1022 }
1023
1024 // Parse the related class name.
1025 if (Tok.isNot(tok::identifier)) {
1026 Diag(Tok, diag::err_objcbridge_related_expected_related_class);
1027 SkipUntil(tok::r_paren, StopAtSemi);
1028 return;
1029 }
1030 IdentifierLoc *RelatedClass = ParseIdentifierLoc();
1031 if (ExpectAndConsume(tok::comma)) {
1032 SkipUntil(tok::r_paren, StopAtSemi);
1033 return;
1034 }
1035
1036 // Parse optional class method name.
1037 IdentifierLoc *ClassMethod = nullptr;
1038 if (Tok.is(tok::identifier)) {
1039 ClassMethod = ParseIdentifierLoc();
1040 if (!TryConsumeToken(tok::colon)) {
1041 Diag(Tok, diag::err_objcbridge_related_selector_name);
1042 SkipUntil(tok::r_paren, StopAtSemi);
1043 return;
1044 }
1045 }
1046 if (!TryConsumeToken(tok::comma)) {
1047 if (Tok.is(tok::colon))
1048 Diag(Tok, diag::err_objcbridge_related_selector_name);
1049 else
1050 Diag(Tok, diag::err_expected) << tok::comma;
1051 SkipUntil(tok::r_paren, StopAtSemi);
1052 return;
1053 }
1054
1055 // Parse optional instance method name.
1056 IdentifierLoc *InstanceMethod = nullptr;
1057 if (Tok.is(tok::identifier))
1058 InstanceMethod = ParseIdentifierLoc();
1059 else if (Tok.isNot(tok::r_paren)) {
1060 Diag(Tok, diag::err_expected) << tok::r_paren;
1061 SkipUntil(tok::r_paren, StopAtSemi);
1062 return;
1063 }
1064
1065 // Closing ')'.
1066 if (T.consumeClose())
1067 return;
1068
1069 if (endLoc)
1070 *endLoc = T.getCloseLocation();
1071
1072 // Record this attribute
1073 attrs.addNew(&ObjCBridgeRelated,
1074 SourceRange(ObjCBridgeRelatedLoc, T.getCloseLocation()),
1075 ScopeName, ScopeLoc,
1076 RelatedClass,
1077 ClassMethod,
1078 InstanceMethod,
1079 Syntax);
1080 }
1081
1082 // Late Parsed Attributes:
1083 // See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
1084
ParseLexedAttributes()1085 void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
1086
ParseLexedAttributes()1087 void Parser::LateParsedClass::ParseLexedAttributes() {
1088 Self->ParseLexedAttributes(*Class);
1089 }
1090
ParseLexedAttributes()1091 void Parser::LateParsedAttribute::ParseLexedAttributes() {
1092 Self->ParseLexedAttribute(*this, true, false);
1093 }
1094
1095 /// Wrapper class which calls ParseLexedAttribute, after setting up the
1096 /// scope appropriately.
ParseLexedAttributes(ParsingClass & Class)1097 void Parser::ParseLexedAttributes(ParsingClass &Class) {
1098 // Deal with templates
1099 // FIXME: Test cases to make sure this does the right thing for templates.
1100 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
1101 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
1102 HasTemplateScope);
1103 if (HasTemplateScope)
1104 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
1105
1106 // Set or update the scope flags.
1107 bool AlreadyHasClassScope = Class.TopLevelClass;
1108 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
1109 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
1110 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
1111
1112 // Enter the scope of nested classes
1113 if (!AlreadyHasClassScope)
1114 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
1115 Class.TagOrTemplate);
1116 if (!Class.LateParsedDeclarations.empty()) {
1117 for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i){
1118 Class.LateParsedDeclarations[i]->ParseLexedAttributes();
1119 }
1120 }
1121
1122 if (!AlreadyHasClassScope)
1123 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
1124 Class.TagOrTemplate);
1125 }
1126
1127
1128 /// \brief Parse all attributes in LAs, and attach them to Decl D.
ParseLexedAttributeList(LateParsedAttrList & LAs,Decl * D,bool EnterScope,bool OnDefinition)1129 void Parser::ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
1130 bool EnterScope, bool OnDefinition) {
1131 assert(LAs.parseSoon() &&
1132 "Attribute list should be marked for immediate parsing.");
1133 for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
1134 if (D)
1135 LAs[i]->addDecl(D);
1136 ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
1137 delete LAs[i];
1138 }
1139 LAs.clear();
1140 }
1141
1142
1143 /// \brief Finish parsing an attribute for which parsing was delayed.
1144 /// This will be called at the end of parsing a class declaration
1145 /// for each LateParsedAttribute. We consume the saved tokens and
1146 /// create an attribute with the arguments filled in. We add this
1147 /// to the Attribute list for the decl.
ParseLexedAttribute(LateParsedAttribute & LA,bool EnterScope,bool OnDefinition)1148 void Parser::ParseLexedAttribute(LateParsedAttribute &LA,
1149 bool EnterScope, bool OnDefinition) {
1150 // Create a fake EOF so that attribute parsing won't go off the end of the
1151 // attribute.
1152 Token AttrEnd;
1153 AttrEnd.startToken();
1154 AttrEnd.setKind(tok::eof);
1155 AttrEnd.setLocation(Tok.getLocation());
1156 AttrEnd.setEofData(LA.Toks.data());
1157 LA.Toks.push_back(AttrEnd);
1158
1159 // Append the current token at the end of the new token stream so that it
1160 // doesn't get lost.
1161 LA.Toks.push_back(Tok);
1162 PP.EnterTokenStream(LA.Toks.data(), LA.Toks.size(), true, false);
1163 // Consume the previously pushed token.
1164 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1165
1166 ParsedAttributes Attrs(AttrFactory);
1167 SourceLocation endLoc;
1168
1169 if (LA.Decls.size() > 0) {
1170 Decl *D = LA.Decls[0];
1171 NamedDecl *ND = dyn_cast<NamedDecl>(D);
1172 RecordDecl *RD = dyn_cast_or_null<RecordDecl>(D->getDeclContext());
1173
1174 // Allow 'this' within late-parsed attributes.
1175 Sema::CXXThisScopeRAII ThisScope(Actions, RD, /*TypeQuals=*/0,
1176 ND && ND->isCXXInstanceMember());
1177
1178 if (LA.Decls.size() == 1) {
1179 // If the Decl is templatized, add template parameters to scope.
1180 bool HasTemplateScope = EnterScope && D->isTemplateDecl();
1181 ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
1182 if (HasTemplateScope)
1183 Actions.ActOnReenterTemplateScope(Actions.CurScope, D);
1184
1185 // If the Decl is on a function, add function parameters to the scope.
1186 bool HasFunScope = EnterScope && D->isFunctionOrFunctionTemplate();
1187 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope, HasFunScope);
1188 if (HasFunScope)
1189 Actions.ActOnReenterFunctionContext(Actions.CurScope, D);
1190
1191 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1192 nullptr, SourceLocation(), AttributeList::AS_GNU,
1193 nullptr);
1194
1195 if (HasFunScope) {
1196 Actions.ActOnExitFunctionContext();
1197 FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
1198 }
1199 if (HasTemplateScope) {
1200 TempScope.Exit();
1201 }
1202 } else {
1203 // If there are multiple decls, then the decl cannot be within the
1204 // function scope.
1205 ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc,
1206 nullptr, SourceLocation(), AttributeList::AS_GNU,
1207 nullptr);
1208 }
1209 } else {
1210 Diag(Tok, diag::warn_attribute_no_decl) << LA.AttrName.getName();
1211 }
1212
1213 const AttributeList *AL = Attrs.getList();
1214 if (OnDefinition && AL && !AL->isCXX11Attribute() &&
1215 AL->isKnownToGCC())
1216 Diag(Tok, diag::warn_attribute_on_function_definition)
1217 << &LA.AttrName;
1218
1219 for (unsigned i = 0, ni = LA.Decls.size(); i < ni; ++i)
1220 Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.Decls[i], Attrs);
1221
1222 // Due to a parsing error, we either went over the cached tokens or
1223 // there are still cached tokens left, so we skip the leftover tokens.
1224 while (Tok.isNot(tok::eof))
1225 ConsumeAnyToken();
1226
1227 if (Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofData())
1228 ConsumeAnyToken();
1229 }
1230
ParseTypeTagForDatatypeAttribute(IdentifierInfo & AttrName,SourceLocation AttrNameLoc,ParsedAttributes & Attrs,SourceLocation * EndLoc,IdentifierInfo * ScopeName,SourceLocation ScopeLoc,AttributeList::Syntax Syntax)1231 void Parser::ParseTypeTagForDatatypeAttribute(IdentifierInfo &AttrName,
1232 SourceLocation AttrNameLoc,
1233 ParsedAttributes &Attrs,
1234 SourceLocation *EndLoc,
1235 IdentifierInfo *ScopeName,
1236 SourceLocation ScopeLoc,
1237 AttributeList::Syntax Syntax) {
1238 assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
1239
1240 BalancedDelimiterTracker T(*this, tok::l_paren);
1241 T.consumeOpen();
1242
1243 if (Tok.isNot(tok::identifier)) {
1244 Diag(Tok, diag::err_expected) << tok::identifier;
1245 T.skipToEnd();
1246 return;
1247 }
1248 IdentifierLoc *ArgumentKind = ParseIdentifierLoc();
1249
1250 if (ExpectAndConsume(tok::comma)) {
1251 T.skipToEnd();
1252 return;
1253 }
1254
1255 SourceRange MatchingCTypeRange;
1256 TypeResult MatchingCType = ParseTypeName(&MatchingCTypeRange);
1257 if (MatchingCType.isInvalid()) {
1258 T.skipToEnd();
1259 return;
1260 }
1261
1262 bool LayoutCompatible = false;
1263 bool MustBeNull = false;
1264 while (TryConsumeToken(tok::comma)) {
1265 if (Tok.isNot(tok::identifier)) {
1266 Diag(Tok, diag::err_expected) << tok::identifier;
1267 T.skipToEnd();
1268 return;
1269 }
1270 IdentifierInfo *Flag = Tok.getIdentifierInfo();
1271 if (Flag->isStr("layout_compatible"))
1272 LayoutCompatible = true;
1273 else if (Flag->isStr("must_be_null"))
1274 MustBeNull = true;
1275 else {
1276 Diag(Tok, diag::err_type_safety_unknown_flag) << Flag;
1277 T.skipToEnd();
1278 return;
1279 }
1280 ConsumeToken(); // consume flag
1281 }
1282
1283 if (!T.consumeClose()) {
1284 Attrs.addNewTypeTagForDatatype(&AttrName, AttrNameLoc, ScopeName, ScopeLoc,
1285 ArgumentKind, MatchingCType.get(),
1286 LayoutCompatible, MustBeNull, Syntax);
1287 }
1288
1289 if (EndLoc)
1290 *EndLoc = T.getCloseLocation();
1291 }
1292
1293 /// DiagnoseProhibitedCXX11Attribute - We have found the opening square brackets
1294 /// of a C++11 attribute-specifier in a location where an attribute is not
1295 /// permitted. By C++11 [dcl.attr.grammar]p6, this is ill-formed. Diagnose this
1296 /// situation.
1297 ///
1298 /// \return \c true if we skipped an attribute-like chunk of tokens, \c false if
1299 /// this doesn't appear to actually be an attribute-specifier, and the caller
1300 /// should try to parse it.
DiagnoseProhibitedCXX11Attribute()1301 bool Parser::DiagnoseProhibitedCXX11Attribute() {
1302 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square));
1303
1304 switch (isCXX11AttributeSpecifier(/*Disambiguate*/true)) {
1305 case CAK_NotAttributeSpecifier:
1306 // No diagnostic: we're in Obj-C++11 and this is not actually an attribute.
1307 return false;
1308
1309 case CAK_InvalidAttributeSpecifier:
1310 Diag(Tok.getLocation(), diag::err_l_square_l_square_not_attribute);
1311 return false;
1312
1313 case CAK_AttributeSpecifier:
1314 // Parse and discard the attributes.
1315 SourceLocation BeginLoc = ConsumeBracket();
1316 ConsumeBracket();
1317 SkipUntil(tok::r_square);
1318 assert(Tok.is(tok::r_square) && "isCXX11AttributeSpecifier lied");
1319 SourceLocation EndLoc = ConsumeBracket();
1320 Diag(BeginLoc, diag::err_attributes_not_allowed)
1321 << SourceRange(BeginLoc, EndLoc);
1322 return true;
1323 }
1324 llvm_unreachable("All cases handled above.");
1325 }
1326
1327 /// \brief We have found the opening square brackets of a C++11
1328 /// attribute-specifier in a location where an attribute is not permitted, but
1329 /// we know where the attributes ought to be written. Parse them anyway, and
1330 /// provide a fixit moving them to the right place.
DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange & Attrs,SourceLocation CorrectLocation)1331 void Parser::DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
1332 SourceLocation CorrectLocation) {
1333 assert((Tok.is(tok::l_square) && NextToken().is(tok::l_square)) ||
1334 Tok.is(tok::kw_alignas));
1335
1336 // Consume the attributes.
1337 SourceLocation Loc = Tok.getLocation();
1338 ParseCXX11Attributes(Attrs);
1339 CharSourceRange AttrRange(SourceRange(Loc, Attrs.Range.getEnd()), true);
1340
1341 Diag(Loc, diag::err_attributes_not_allowed)
1342 << FixItHint::CreateInsertionFromRange(CorrectLocation, AttrRange)
1343 << FixItHint::CreateRemoval(AttrRange);
1344 }
1345
DiagnoseProhibitedAttributes(ParsedAttributesWithRange & attrs)1346 void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) {
1347 Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed)
1348 << attrs.Range;
1349 }
1350
ProhibitCXX11Attributes(ParsedAttributesWithRange & attrs)1351 void Parser::ProhibitCXX11Attributes(ParsedAttributesWithRange &attrs) {
1352 AttributeList *AttrList = attrs.getList();
1353 while (AttrList) {
1354 if (AttrList->isCXX11Attribute()) {
1355 Diag(AttrList->getLoc(), diag::err_attribute_not_type_attr)
1356 << AttrList->getName();
1357 AttrList->setInvalid();
1358 }
1359 AttrList = AttrList->getNext();
1360 }
1361 }
1362
1363 /// ParseDeclaration - Parse a full 'declaration', which consists of
1364 /// declaration-specifiers, some number of declarators, and a semicolon.
1365 /// 'Context' should be a Declarator::TheContext value. This returns the
1366 /// location of the semicolon in DeclEnd.
1367 ///
1368 /// declaration: [C99 6.7]
1369 /// block-declaration ->
1370 /// simple-declaration
1371 /// others [FIXME]
1372 /// [C++] template-declaration
1373 /// [C++] namespace-definition
1374 /// [C++] using-directive
1375 /// [C++] using-declaration
1376 /// [C++11/C11] static_assert-declaration
1377 /// others... [FIXME]
1378 ///
ParseDeclaration(unsigned Context,SourceLocation & DeclEnd,ParsedAttributesWithRange & attrs)1379 Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context,
1380 SourceLocation &DeclEnd,
1381 ParsedAttributesWithRange &attrs) {
1382 ParenBraceBracketBalancer BalancerRAIIObj(*this);
1383 // Must temporarily exit the objective-c container scope for
1384 // parsing c none objective-c decls.
1385 ObjCDeclContextSwitch ObjCDC(*this);
1386
1387 Decl *SingleDecl = nullptr;
1388 Decl *OwnedType = nullptr;
1389 switch (Tok.getKind()) {
1390 case tok::kw_template:
1391 case tok::kw_export:
1392 ProhibitAttributes(attrs);
1393 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
1394 break;
1395 case tok::kw_inline:
1396 // Could be the start of an inline namespace. Allowed as an ext in C++03.
1397 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_namespace)) {
1398 ProhibitAttributes(attrs);
1399 SourceLocation InlineLoc = ConsumeToken();
1400 SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc);
1401 break;
1402 }
1403 return ParseSimpleDeclaration(Context, DeclEnd, attrs,
1404 true);
1405 case tok::kw_namespace:
1406 ProhibitAttributes(attrs);
1407 SingleDecl = ParseNamespace(Context, DeclEnd);
1408 break;
1409 case tok::kw_using:
1410 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
1411 DeclEnd, attrs, &OwnedType);
1412 break;
1413 case tok::kw_static_assert:
1414 case tok::kw__Static_assert:
1415 ProhibitAttributes(attrs);
1416 SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
1417 break;
1418 default:
1419 return ParseSimpleDeclaration(Context, DeclEnd, attrs, true);
1420 }
1421
1422 // This routine returns a DeclGroup, if the thing we parsed only contains a
1423 // single decl, convert it now. Alias declarations can also declare a type;
1424 // include that too if it is present.
1425 return Actions.ConvertDeclToDeclGroup(SingleDecl, OwnedType);
1426 }
1427
1428 /// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
1429 /// declaration-specifiers init-declarator-list[opt] ';'
1430 /// [C++11] attribute-specifier-seq decl-specifier-seq[opt]
1431 /// init-declarator-list ';'
1432 ///[C90/C++]init-declarator-list ';' [TODO]
1433 /// [OMP] threadprivate-directive [TODO]
1434 ///
1435 /// for-range-declaration: [C++11 6.5p1: stmt.ranged]
1436 /// attribute-specifier-seq[opt] type-specifier-seq declarator
1437 ///
1438 /// If RequireSemi is false, this does not check for a ';' at the end of the
1439 /// declaration. If it is true, it checks for and eats it.
1440 ///
1441 /// If FRI is non-null, we might be parsing a for-range-declaration instead
1442 /// of a simple-declaration. If we find that we are, we also parse the
1443 /// for-range-initializer, and place it here.
1444 Parser::DeclGroupPtrTy
ParseSimpleDeclaration(unsigned Context,SourceLocation & DeclEnd,ParsedAttributesWithRange & Attrs,bool RequireSemi,ForRangeInit * FRI)1445 Parser::ParseSimpleDeclaration(unsigned Context,
1446 SourceLocation &DeclEnd,
1447 ParsedAttributesWithRange &Attrs,
1448 bool RequireSemi, ForRangeInit *FRI) {
1449 // Parse the common declaration-specifiers piece.
1450 ParsingDeclSpec DS(*this);
1451
1452 DeclSpecContext DSContext = getDeclSpecContextFromDeclaratorContext(Context);
1453 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, DSContext);
1454
1455 // If we had a free-standing type definition with a missing semicolon, we
1456 // may get this far before the problem becomes obvious.
1457 if (DS.hasTagDefinition() &&
1458 DiagnoseMissingSemiAfterTagDefinition(DS, AS_none, DSContext))
1459 return DeclGroupPtrTy();
1460
1461 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1462 // declaration-specifiers init-declarator-list[opt] ';'
1463 if (Tok.is(tok::semi)) {
1464 ProhibitAttributes(Attrs);
1465 DeclEnd = Tok.getLocation();
1466 if (RequireSemi) ConsumeToken();
1467 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1468 DS);
1469 DS.complete(TheDecl);
1470 return Actions.ConvertDeclToDeclGroup(TheDecl);
1471 }
1472
1473 DS.takeAttributesFrom(Attrs);
1474 return ParseDeclGroup(DS, Context, &DeclEnd, FRI);
1475 }
1476
1477 /// Returns true if this might be the start of a declarator, or a common typo
1478 /// for a declarator.
MightBeDeclarator(unsigned Context)1479 bool Parser::MightBeDeclarator(unsigned Context) {
1480 switch (Tok.getKind()) {
1481 case tok::annot_cxxscope:
1482 case tok::annot_template_id:
1483 case tok::caret:
1484 case tok::code_completion:
1485 case tok::coloncolon:
1486 case tok::ellipsis:
1487 case tok::kw___attribute:
1488 case tok::kw_operator:
1489 case tok::l_paren:
1490 case tok::star:
1491 return true;
1492
1493 case tok::amp:
1494 case tok::ampamp:
1495 return getLangOpts().CPlusPlus;
1496
1497 case tok::l_square: // Might be an attribute on an unnamed bit-field.
1498 return Context == Declarator::MemberContext && getLangOpts().CPlusPlus11 &&
1499 NextToken().is(tok::l_square);
1500
1501 case tok::colon: // Might be a typo for '::' or an unnamed bit-field.
1502 return Context == Declarator::MemberContext || getLangOpts().CPlusPlus;
1503
1504 case tok::identifier:
1505 switch (NextToken().getKind()) {
1506 case tok::code_completion:
1507 case tok::coloncolon:
1508 case tok::comma:
1509 case tok::equal:
1510 case tok::equalequal: // Might be a typo for '='.
1511 case tok::kw_alignas:
1512 case tok::kw_asm:
1513 case tok::kw___attribute:
1514 case tok::l_brace:
1515 case tok::l_paren:
1516 case tok::l_square:
1517 case tok::less:
1518 case tok::r_brace:
1519 case tok::r_paren:
1520 case tok::r_square:
1521 case tok::semi:
1522 return true;
1523
1524 case tok::colon:
1525 // At namespace scope, 'identifier:' is probably a typo for 'identifier::'
1526 // and in block scope it's probably a label. Inside a class definition,
1527 // this is a bit-field.
1528 return Context == Declarator::MemberContext ||
1529 (getLangOpts().CPlusPlus && Context == Declarator::FileContext);
1530
1531 case tok::identifier: // Possible virt-specifier.
1532 return getLangOpts().CPlusPlus11 && isCXX11VirtSpecifier(NextToken());
1533
1534 default:
1535 return false;
1536 }
1537
1538 default:
1539 return false;
1540 }
1541 }
1542
1543 /// Skip until we reach something which seems like a sensible place to pick
1544 /// up parsing after a malformed declaration. This will sometimes stop sooner
1545 /// than SkipUntil(tok::r_brace) would, but will never stop later.
SkipMalformedDecl()1546 void Parser::SkipMalformedDecl() {
1547 while (true) {
1548 switch (Tok.getKind()) {
1549 case tok::l_brace:
1550 // Skip until matching }, then stop. We've probably skipped over
1551 // a malformed class or function definition or similar.
1552 ConsumeBrace();
1553 SkipUntil(tok::r_brace);
1554 if (Tok.is(tok::comma) || Tok.is(tok::l_brace) || Tok.is(tok::kw_try)) {
1555 // This declaration isn't over yet. Keep skipping.
1556 continue;
1557 }
1558 TryConsumeToken(tok::semi);
1559 return;
1560
1561 case tok::l_square:
1562 ConsumeBracket();
1563 SkipUntil(tok::r_square);
1564 continue;
1565
1566 case tok::l_paren:
1567 ConsumeParen();
1568 SkipUntil(tok::r_paren);
1569 continue;
1570
1571 case tok::r_brace:
1572 return;
1573
1574 case tok::semi:
1575 ConsumeToken();
1576 return;
1577
1578 case tok::kw_inline:
1579 // 'inline namespace' at the start of a line is almost certainly
1580 // a good place to pick back up parsing, except in an Objective-C
1581 // @interface context.
1582 if (Tok.isAtStartOfLine() && NextToken().is(tok::kw_namespace) &&
1583 (!ParsingInObjCContainer || CurParsedObjCImpl))
1584 return;
1585 break;
1586
1587 case tok::kw_namespace:
1588 // 'namespace' at the start of a line is almost certainly a good
1589 // place to pick back up parsing, except in an Objective-C
1590 // @interface context.
1591 if (Tok.isAtStartOfLine() &&
1592 (!ParsingInObjCContainer || CurParsedObjCImpl))
1593 return;
1594 break;
1595
1596 case tok::at:
1597 // @end is very much like } in Objective-C contexts.
1598 if (NextToken().isObjCAtKeyword(tok::objc_end) &&
1599 ParsingInObjCContainer)
1600 return;
1601 break;
1602
1603 case tok::minus:
1604 case tok::plus:
1605 // - and + probably start new method declarations in Objective-C contexts.
1606 if (Tok.isAtStartOfLine() && ParsingInObjCContainer)
1607 return;
1608 break;
1609
1610 case tok::eof:
1611 case tok::annot_module_begin:
1612 case tok::annot_module_end:
1613 case tok::annot_module_include:
1614 return;
1615
1616 default:
1617 break;
1618 }
1619
1620 ConsumeAnyToken();
1621 }
1622 }
1623
1624 /// ParseDeclGroup - Having concluded that this is either a function
1625 /// definition or a group of object declarations, actually parse the
1626 /// result.
ParseDeclGroup(ParsingDeclSpec & DS,unsigned Context,SourceLocation * DeclEnd,ForRangeInit * FRI)1627 Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
1628 unsigned Context,
1629 SourceLocation *DeclEnd,
1630 ForRangeInit *FRI) {
1631 // Parse the first declarator.
1632 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context));
1633 ParseDeclarator(D);
1634
1635 // Bail out if the first declarator didn't seem well-formed.
1636 if (!D.hasName() && !D.mayOmitIdentifier()) {
1637 SkipMalformedDecl();
1638 return DeclGroupPtrTy();
1639 }
1640
1641 // Save late-parsed attributes for now; they need to be parsed in the
1642 // appropriate function scope after the function Decl has been constructed.
1643 // These will be parsed in ParseFunctionDefinition or ParseLexedAttrList.
1644 LateParsedAttrList LateParsedAttrs(true);
1645 if (D.isFunctionDeclarator()) {
1646 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1647
1648 // The _Noreturn keyword can't appear here, unlike the GNU noreturn
1649 // attribute. If we find the keyword here, tell the user to put it
1650 // at the start instead.
1651 if (Tok.is(tok::kw__Noreturn)) {
1652 SourceLocation Loc = ConsumeToken();
1653 const char *PrevSpec;
1654 unsigned DiagID;
1655
1656 // We can offer a fixit if it's valid to mark this function as _Noreturn
1657 // and we don't have any other declarators in this declaration.
1658 bool Fixit = !DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
1659 MaybeParseGNUAttributes(D, &LateParsedAttrs);
1660 Fixit &= Tok.is(tok::semi) || Tok.is(tok::l_brace) || Tok.is(tok::kw_try);
1661
1662 Diag(Loc, diag::err_c11_noreturn_misplaced)
1663 << (Fixit ? FixItHint::CreateRemoval(Loc) : FixItHint())
1664 << (Fixit ? FixItHint::CreateInsertion(D.getLocStart(), "_Noreturn ")
1665 : FixItHint());
1666 }
1667 }
1668
1669 // Check to see if we have a function *definition* which must have a body.
1670 if (D.isFunctionDeclarator() &&
1671 // Look at the next token to make sure that this isn't a function
1672 // declaration. We have to check this because __attribute__ might be the
1673 // start of a function definition in GCC-extended K&R C.
1674 !isDeclarationAfterDeclarator()) {
1675
1676 // Function definitions are only allowed at file scope and in C++ classes.
1677 // The C++ inline method definition case is handled elsewhere, so we only
1678 // need to handle the file scope definition case.
1679 if (Context == Declarator::FileContext) {
1680 if (isStartOfFunctionDefinition(D)) {
1681 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
1682 Diag(Tok, diag::err_function_declared_typedef);
1683
1684 // Recover by treating the 'typedef' as spurious.
1685 DS.ClearStorageClassSpecs();
1686 }
1687
1688 Decl *TheDecl =
1689 ParseFunctionDefinition(D, ParsedTemplateInfo(), &LateParsedAttrs);
1690 return Actions.ConvertDeclToDeclGroup(TheDecl);
1691 }
1692
1693 if (isDeclarationSpecifier()) {
1694 // If there is an invalid declaration specifier right after the function
1695 // prototype, then we must be in a missing semicolon case where this isn't
1696 // actually a body. Just fall through into the code that handles it as a
1697 // prototype, and let the top-level code handle the erroneous declspec
1698 // where it would otherwise expect a comma or semicolon.
1699 } else {
1700 Diag(Tok, diag::err_expected_fn_body);
1701 SkipUntil(tok::semi);
1702 return DeclGroupPtrTy();
1703 }
1704 } else {
1705 if (Tok.is(tok::l_brace)) {
1706 Diag(Tok, diag::err_function_definition_not_allowed);
1707 SkipMalformedDecl();
1708 return DeclGroupPtrTy();
1709 }
1710 }
1711 }
1712
1713 if (ParseAsmAttributesAfterDeclarator(D))
1714 return DeclGroupPtrTy();
1715
1716 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
1717 // must parse and analyze the for-range-initializer before the declaration is
1718 // analyzed.
1719 //
1720 // Handle the Objective-C for-in loop variable similarly, although we
1721 // don't need to parse the container in advance.
1722 if (FRI && (Tok.is(tok::colon) || isTokIdentifier_in())) {
1723 bool IsForRangeLoop = false;
1724 if (TryConsumeToken(tok::colon, FRI->ColonLoc)) {
1725 IsForRangeLoop = true;
1726 if (Tok.is(tok::l_brace))
1727 FRI->RangeExpr = ParseBraceInitializer();
1728 else
1729 FRI->RangeExpr = ParseExpression();
1730 }
1731
1732 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1733 if (IsForRangeLoop)
1734 Actions.ActOnCXXForRangeDecl(ThisDecl);
1735 Actions.FinalizeDeclaration(ThisDecl);
1736 D.complete(ThisDecl);
1737 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, ThisDecl);
1738 }
1739
1740 SmallVector<Decl *, 8> DeclsInGroup;
1741 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(
1742 D, ParsedTemplateInfo(), FRI);
1743 if (LateParsedAttrs.size() > 0)
1744 ParseLexedAttributeList(LateParsedAttrs, FirstDecl, true, false);
1745 D.complete(FirstDecl);
1746 if (FirstDecl)
1747 DeclsInGroup.push_back(FirstDecl);
1748
1749 bool ExpectSemi = Context != Declarator::ForContext;
1750
1751 // If we don't have a comma, it is either the end of the list (a ';') or an
1752 // error, bail out.
1753 SourceLocation CommaLoc;
1754 while (TryConsumeToken(tok::comma, CommaLoc)) {
1755 if (Tok.isAtStartOfLine() && ExpectSemi && !MightBeDeclarator(Context)) {
1756 // This comma was followed by a line-break and something which can't be
1757 // the start of a declarator. The comma was probably a typo for a
1758 // semicolon.
1759 Diag(CommaLoc, diag::err_expected_semi_declaration)
1760 << FixItHint::CreateReplacement(CommaLoc, ";");
1761 ExpectSemi = false;
1762 break;
1763 }
1764
1765 // Parse the next declarator.
1766 D.clear();
1767 D.setCommaLoc(CommaLoc);
1768
1769 // Accept attributes in an init-declarator. In the first declarator in a
1770 // declaration, these would be part of the declspec. In subsequent
1771 // declarators, they become part of the declarator itself, so that they
1772 // don't apply to declarators after *this* one. Examples:
1773 // short __attribute__((common)) var; -> declspec
1774 // short var __attribute__((common)); -> declarator
1775 // short x, __attribute__((common)) var; -> declarator
1776 MaybeParseGNUAttributes(D);
1777
1778 // MSVC parses but ignores qualifiers after the comma as an extension.
1779 if (getLangOpts().MicrosoftExt)
1780 DiagnoseAndSkipExtendedMicrosoftTypeAttributes();
1781
1782 ParseDeclarator(D);
1783 if (!D.isInvalidType()) {
1784 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
1785 D.complete(ThisDecl);
1786 if (ThisDecl)
1787 DeclsInGroup.push_back(ThisDecl);
1788 }
1789 }
1790
1791 if (DeclEnd)
1792 *DeclEnd = Tok.getLocation();
1793
1794 if (ExpectSemi &&
1795 ExpectAndConsumeSemi(Context == Declarator::FileContext
1796 ? diag::err_invalid_token_after_toplevel_declarator
1797 : diag::err_expected_semi_declaration)) {
1798 // Okay, there was no semicolon and one was expected. If we see a
1799 // declaration specifier, just assume it was missing and continue parsing.
1800 // Otherwise things are very confused and we skip to recover.
1801 if (!isDeclarationSpecifier()) {
1802 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
1803 TryConsumeToken(tok::semi);
1804 }
1805 }
1806
1807 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
1808 }
1809
1810 /// Parse an optional simple-asm-expr and attributes, and attach them to a
1811 /// declarator. Returns true on an error.
ParseAsmAttributesAfterDeclarator(Declarator & D)1812 bool Parser::ParseAsmAttributesAfterDeclarator(Declarator &D) {
1813 // If a simple-asm-expr is present, parse it.
1814 if (Tok.is(tok::kw_asm)) {
1815 SourceLocation Loc;
1816 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
1817 if (AsmLabel.isInvalid()) {
1818 SkipUntil(tok::semi, StopBeforeMatch);
1819 return true;
1820 }
1821
1822 D.setAsmLabel(AsmLabel.get());
1823 D.SetRangeEnd(Loc);
1824 }
1825
1826 MaybeParseGNUAttributes(D);
1827 return false;
1828 }
1829
1830 /// \brief Parse 'declaration' after parsing 'declaration-specifiers
1831 /// declarator'. This method parses the remainder of the declaration
1832 /// (including any attributes or initializer, among other things) and
1833 /// finalizes the declaration.
1834 ///
1835 /// init-declarator: [C99 6.7]
1836 /// declarator
1837 /// declarator '=' initializer
1838 /// [GNU] declarator simple-asm-expr[opt] attributes[opt]
1839 /// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
1840 /// [C++] declarator initializer[opt]
1841 ///
1842 /// [C++] initializer:
1843 /// [C++] '=' initializer-clause
1844 /// [C++] '(' expression-list ')'
1845 /// [C++0x] '=' 'default' [TODO]
1846 /// [C++0x] '=' 'delete'
1847 /// [C++0x] braced-init-list
1848 ///
1849 /// According to the standard grammar, =default and =delete are function
1850 /// definitions, but that definitely doesn't fit with the parser here.
1851 ///
ParseDeclarationAfterDeclarator(Declarator & D,const ParsedTemplateInfo & TemplateInfo)1852 Decl *Parser::ParseDeclarationAfterDeclarator(
1853 Declarator &D, const ParsedTemplateInfo &TemplateInfo) {
1854 if (ParseAsmAttributesAfterDeclarator(D))
1855 return nullptr;
1856
1857 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
1858 }
1859
ParseDeclarationAfterDeclaratorAndAttributes(Declarator & D,const ParsedTemplateInfo & TemplateInfo,ForRangeInit * FRI)1860 Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(
1861 Declarator &D, const ParsedTemplateInfo &TemplateInfo, ForRangeInit *FRI) {
1862 // Inform the current actions module that we just parsed this declarator.
1863 Decl *ThisDecl = nullptr;
1864 switch (TemplateInfo.Kind) {
1865 case ParsedTemplateInfo::NonTemplate:
1866 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1867 break;
1868
1869 case ParsedTemplateInfo::Template:
1870 case ParsedTemplateInfo::ExplicitSpecialization: {
1871 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
1872 *TemplateInfo.TemplateParams,
1873 D);
1874 if (VarTemplateDecl *VT = dyn_cast_or_null<VarTemplateDecl>(ThisDecl))
1875 // Re-direct this decl to refer to the templated decl so that we can
1876 // initialize it.
1877 ThisDecl = VT->getTemplatedDecl();
1878 break;
1879 }
1880 case ParsedTemplateInfo::ExplicitInstantiation: {
1881 if (Tok.is(tok::semi)) {
1882 DeclResult ThisRes = Actions.ActOnExplicitInstantiation(
1883 getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc, D);
1884 if (ThisRes.isInvalid()) {
1885 SkipUntil(tok::semi, StopBeforeMatch);
1886 return nullptr;
1887 }
1888 ThisDecl = ThisRes.get();
1889 } else {
1890 // FIXME: This check should be for a variable template instantiation only.
1891
1892 // Check that this is a valid instantiation
1893 if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) {
1894 // If the declarator-id is not a template-id, issue a diagnostic and
1895 // recover by ignoring the 'template' keyword.
1896 Diag(Tok, diag::err_template_defn_explicit_instantiation)
1897 << 2 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
1898 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
1899 } else {
1900 SourceLocation LAngleLoc =
1901 PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
1902 Diag(D.getIdentifierLoc(),
1903 diag::err_explicit_instantiation_with_definition)
1904 << SourceRange(TemplateInfo.TemplateLoc)
1905 << FixItHint::CreateInsertion(LAngleLoc, "<>");
1906
1907 // Recover as if it were an explicit specialization.
1908 TemplateParameterLists FakedParamLists;
1909 FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
1910 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, nullptr,
1911 0, LAngleLoc));
1912
1913 ThisDecl =
1914 Actions.ActOnTemplateDeclarator(getCurScope(), FakedParamLists, D);
1915 }
1916 }
1917 break;
1918 }
1919 }
1920
1921 bool TypeContainsAuto = D.getDeclSpec().containsPlaceholderType();
1922
1923 // Parse declarator '=' initializer.
1924 // If a '==' or '+=' is found, suggest a fixit to '='.
1925 if (isTokenEqualOrEqualTypo()) {
1926 SourceLocation EqualLoc = ConsumeToken();
1927
1928 if (Tok.is(tok::kw_delete)) {
1929 if (D.isFunctionDeclarator())
1930 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
1931 << 1 /* delete */;
1932 else
1933 Diag(ConsumeToken(), diag::err_deleted_non_function);
1934 } else if (Tok.is(tok::kw_default)) {
1935 if (D.isFunctionDeclarator())
1936 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
1937 << 0 /* default */;
1938 else
1939 Diag(ConsumeToken(), diag::err_default_special_members);
1940 } else {
1941 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1942 EnterScope(0);
1943 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
1944 }
1945
1946 if (Tok.is(tok::code_completion)) {
1947 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
1948 Actions.FinalizeDeclaration(ThisDecl);
1949 cutOffParsing();
1950 return nullptr;
1951 }
1952
1953 ExprResult Init(ParseInitializer());
1954
1955 // If this is the only decl in (possibly) range based for statement,
1956 // our best guess is that the user meant ':' instead of '='.
1957 if (Tok.is(tok::r_paren) && FRI && D.isFirstDeclarator()) {
1958 Diag(EqualLoc, diag::err_single_decl_assign_in_for_range)
1959 << FixItHint::CreateReplacement(EqualLoc, ":");
1960 // We are trying to stop parser from looking for ';' in this for
1961 // statement, therefore preventing spurious errors to be issued.
1962 FRI->ColonLoc = EqualLoc;
1963 Init = ExprError();
1964 FRI->RangeExpr = Init;
1965 }
1966
1967 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1968 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
1969 ExitScope();
1970 }
1971
1972 if (Init.isInvalid()) {
1973 SmallVector<tok::TokenKind, 2> StopTokens;
1974 StopTokens.push_back(tok::comma);
1975 if (D.getContext() == Declarator::ForContext)
1976 StopTokens.push_back(tok::r_paren);
1977 SkipUntil(StopTokens, StopAtSemi | StopBeforeMatch);
1978 Actions.ActOnInitializerError(ThisDecl);
1979 } else
1980 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
1981 /*DirectInit=*/false, TypeContainsAuto);
1982 }
1983 } else if (Tok.is(tok::l_paren)) {
1984 // Parse C++ direct initializer: '(' expression-list ')'
1985 BalancedDelimiterTracker T(*this, tok::l_paren);
1986 T.consumeOpen();
1987
1988 ExprVector Exprs;
1989 CommaLocsTy CommaLocs;
1990
1991 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
1992 EnterScope(0);
1993 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
1994 }
1995
1996 if (ParseExpressionList(Exprs, CommaLocs)) {
1997 Actions.ActOnInitializerError(ThisDecl);
1998 SkipUntil(tok::r_paren, StopAtSemi);
1999
2000 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2001 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2002 ExitScope();
2003 }
2004 } else {
2005 // Match the ')'.
2006 T.consumeClose();
2007
2008 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
2009 "Unexpected number of commas!");
2010
2011 if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
2012 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2013 ExitScope();
2014 }
2015
2016 ExprResult Initializer = Actions.ActOnParenListExpr(T.getOpenLocation(),
2017 T.getCloseLocation(),
2018 Exprs);
2019 Actions.AddInitializerToDecl(ThisDecl, Initializer.get(),
2020 /*DirectInit=*/true, TypeContainsAuto);
2021 }
2022 } else if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace) &&
2023 (!CurParsedObjCImpl || !D.isFunctionDeclarator())) {
2024 // Parse C++0x braced-init-list.
2025 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
2026
2027 if (D.getCXXScopeSpec().isSet()) {
2028 EnterScope(0);
2029 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
2030 }
2031
2032 ExprResult Init(ParseBraceInitializer());
2033
2034 if (D.getCXXScopeSpec().isSet()) {
2035 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
2036 ExitScope();
2037 }
2038
2039 if (Init.isInvalid()) {
2040 Actions.ActOnInitializerError(ThisDecl);
2041 } else
2042 Actions.AddInitializerToDecl(ThisDecl, Init.get(),
2043 /*DirectInit=*/true, TypeContainsAuto);
2044
2045 } else {
2046 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto);
2047 }
2048
2049 Actions.FinalizeDeclaration(ThisDecl);
2050
2051 return ThisDecl;
2052 }
2053
2054 /// ParseSpecifierQualifierList
2055 /// specifier-qualifier-list:
2056 /// type-specifier specifier-qualifier-list[opt]
2057 /// type-qualifier specifier-qualifier-list[opt]
2058 /// [GNU] attributes specifier-qualifier-list[opt]
2059 ///
ParseSpecifierQualifierList(DeclSpec & DS,AccessSpecifier AS,DeclSpecContext DSC)2060 void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS,
2061 DeclSpecContext DSC) {
2062 /// specifier-qualifier-list is a subset of declaration-specifiers. Just
2063 /// parse declaration-specifiers and complain about extra stuff.
2064 /// TODO: diagnose attribute-specifiers and alignment-specifiers.
2065 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC);
2066
2067 // Validate declspec for type-name.
2068 unsigned Specs = DS.getParsedSpecifiers();
2069 if (isTypeSpecifier(DSC) && !DS.hasTypeSpecifier()) {
2070 Diag(Tok, diag::err_expected_type);
2071 DS.SetTypeSpecError();
2072 } else if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() &&
2073 !DS.hasAttributes()) {
2074 Diag(Tok, diag::err_typename_requires_specqual);
2075 if (!DS.hasTypeSpecifier())
2076 DS.SetTypeSpecError();
2077 }
2078
2079 // Issue diagnostic and remove storage class if present.
2080 if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
2081 if (DS.getStorageClassSpecLoc().isValid())
2082 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
2083 else
2084 Diag(DS.getThreadStorageClassSpecLoc(),
2085 diag::err_typename_invalid_storageclass);
2086 DS.ClearStorageClassSpecs();
2087 }
2088
2089 // Issue diagnostic and remove function specfier if present.
2090 if (Specs & DeclSpec::PQ_FunctionSpecifier) {
2091 if (DS.isInlineSpecified())
2092 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
2093 if (DS.isVirtualSpecified())
2094 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
2095 if (DS.isExplicitSpecified())
2096 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
2097 DS.ClearFunctionSpecs();
2098 }
2099
2100 // Issue diagnostic and remove constexpr specfier if present.
2101 if (DS.isConstexprSpecified()) {
2102 Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr);
2103 DS.ClearConstexprSpec();
2104 }
2105 }
2106
2107 /// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
2108 /// specified token is valid after the identifier in a declarator which
2109 /// immediately follows the declspec. For example, these things are valid:
2110 ///
2111 /// int x [ 4]; // direct-declarator
2112 /// int x ( int y); // direct-declarator
2113 /// int(int x ) // direct-declarator
2114 /// int x ; // simple-declaration
2115 /// int x = 17; // init-declarator-list
2116 /// int x , y; // init-declarator-list
2117 /// int x __asm__ ("foo"); // init-declarator-list
2118 /// int x : 4; // struct-declarator
2119 /// int x { 5}; // C++'0x unified initializers
2120 ///
2121 /// This is not, because 'x' does not immediately follow the declspec (though
2122 /// ')' happens to be valid anyway).
2123 /// int (x)
2124 ///
isValidAfterIdentifierInDeclarator(const Token & T)2125 static bool isValidAfterIdentifierInDeclarator(const Token &T) {
2126 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) ||
2127 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) ||
2128 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon);
2129 }
2130
2131
2132 /// ParseImplicitInt - This method is called when we have an non-typename
2133 /// identifier in a declspec (which normally terminates the decl spec) when
2134 /// the declspec has no type specifier. In this case, the declspec is either
2135 /// malformed or is "implicit int" (in K&R and C89).
2136 ///
2137 /// This method handles diagnosing this prettily and returns false if the
2138 /// declspec is done being processed. If it recovers and thinks there may be
2139 /// other pieces of declspec after it, it returns true.
2140 ///
ParseImplicitInt(DeclSpec & DS,CXXScopeSpec * SS,const ParsedTemplateInfo & TemplateInfo,AccessSpecifier AS,DeclSpecContext DSC,ParsedAttributesWithRange & Attrs)2141 bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
2142 const ParsedTemplateInfo &TemplateInfo,
2143 AccessSpecifier AS, DeclSpecContext DSC,
2144 ParsedAttributesWithRange &Attrs) {
2145 assert(Tok.is(tok::identifier) && "should have identifier");
2146
2147 SourceLocation Loc = Tok.getLocation();
2148 // If we see an identifier that is not a type name, we normally would
2149 // parse it as the identifer being declared. However, when a typename
2150 // is typo'd or the definition is not included, this will incorrectly
2151 // parse the typename as the identifier name and fall over misparsing
2152 // later parts of the diagnostic.
2153 //
2154 // As such, we try to do some look-ahead in cases where this would
2155 // otherwise be an "implicit-int" case to see if this is invalid. For
2156 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
2157 // an identifier with implicit int, we'd get a parse error because the
2158 // next token is obviously invalid for a type. Parse these as a case
2159 // with an invalid type specifier.
2160 assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
2161
2162 // Since we know that this either implicit int (which is rare) or an
2163 // error, do lookahead to try to do better recovery. This never applies
2164 // within a type specifier. Outside of C++, we allow this even if the
2165 // language doesn't "officially" support implicit int -- we support
2166 // implicit int as an extension in C99 and C11.
2167 if (!isTypeSpecifier(DSC) && !getLangOpts().CPlusPlus &&
2168 isValidAfterIdentifierInDeclarator(NextToken())) {
2169 // If this token is valid for implicit int, e.g. "static x = 4", then
2170 // we just avoid eating the identifier, so it will be parsed as the
2171 // identifier in the declarator.
2172 return false;
2173 }
2174
2175 if (getLangOpts().CPlusPlus &&
2176 DS.getStorageClassSpec() == DeclSpec::SCS_auto) {
2177 // Don't require a type specifier if we have the 'auto' storage class
2178 // specifier in C++98 -- we'll promote it to a type specifier.
2179 if (SS)
2180 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2181 return false;
2182 }
2183
2184 // Otherwise, if we don't consume this token, we are going to emit an
2185 // error anyway. Try to recover from various common problems. Check
2186 // to see if this was a reference to a tag name without a tag specified.
2187 // This is a common problem in C (saying 'foo' instead of 'struct foo').
2188 //
2189 // C++ doesn't need this, and isTagName doesn't take SS.
2190 if (SS == nullptr) {
2191 const char *TagName = nullptr, *FixitTagName = nullptr;
2192 tok::TokenKind TagKind = tok::unknown;
2193
2194 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
2195 default: break;
2196 case DeclSpec::TST_enum:
2197 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
2198 case DeclSpec::TST_union:
2199 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
2200 case DeclSpec::TST_struct:
2201 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
2202 case DeclSpec::TST_interface:
2203 TagName="__interface"; FixitTagName = "__interface ";
2204 TagKind=tok::kw___interface;break;
2205 case DeclSpec::TST_class:
2206 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
2207 }
2208
2209 if (TagName) {
2210 IdentifierInfo *TokenName = Tok.getIdentifierInfo();
2211 LookupResult R(Actions, TokenName, SourceLocation(),
2212 Sema::LookupOrdinaryName);
2213
2214 Diag(Loc, diag::err_use_of_tag_name_without_tag)
2215 << TokenName << TagName << getLangOpts().CPlusPlus
2216 << FixItHint::CreateInsertion(Tok.getLocation(), FixitTagName);
2217
2218 if (Actions.LookupParsedName(R, getCurScope(), SS)) {
2219 for (LookupResult::iterator I = R.begin(), IEnd = R.end();
2220 I != IEnd; ++I)
2221 Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type)
2222 << TokenName << TagName;
2223 }
2224
2225 // Parse this as a tag as if the missing tag were present.
2226 if (TagKind == tok::kw_enum)
2227 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSC_normal);
2228 else
2229 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS,
2230 /*EnteringContext*/ false, DSC_normal, Attrs);
2231 return true;
2232 }
2233 }
2234
2235 // Determine whether this identifier could plausibly be the name of something
2236 // being declared (with a missing type).
2237 if (!isTypeSpecifier(DSC) &&
2238 (!SS || DSC == DSC_top_level || DSC == DSC_class)) {
2239 // Look ahead to the next token to try to figure out what this declaration
2240 // was supposed to be.
2241 switch (NextToken().getKind()) {
2242 case tok::l_paren: {
2243 // static x(4); // 'x' is not a type
2244 // x(int n); // 'x' is not a type
2245 // x (*p)[]; // 'x' is a type
2246 //
2247 // Since we're in an error case, we can afford to perform a tentative
2248 // parse to determine which case we're in.
2249 TentativeParsingAction PA(*this);
2250 ConsumeToken();
2251 TPResult TPR = TryParseDeclarator(/*mayBeAbstract*/false);
2252 PA.Revert();
2253
2254 if (TPR != TPResult::False) {
2255 // The identifier is followed by a parenthesized declarator.
2256 // It's supposed to be a type.
2257 break;
2258 }
2259
2260 // If we're in a context where we could be declaring a constructor,
2261 // check whether this is a constructor declaration with a bogus name.
2262 if (DSC == DSC_class || (DSC == DSC_top_level && SS)) {
2263 IdentifierInfo *II = Tok.getIdentifierInfo();
2264 if (Actions.isCurrentClassNameTypo(II, SS)) {
2265 Diag(Loc, diag::err_constructor_bad_name)
2266 << Tok.getIdentifierInfo() << II
2267 << FixItHint::CreateReplacement(Tok.getLocation(), II->getName());
2268 Tok.setIdentifierInfo(II);
2269 }
2270 }
2271 // Fall through.
2272 }
2273 case tok::comma:
2274 case tok::equal:
2275 case tok::kw_asm:
2276 case tok::l_brace:
2277 case tok::l_square:
2278 case tok::semi:
2279 // This looks like a variable or function declaration. The type is
2280 // probably missing. We're done parsing decl-specifiers.
2281 if (SS)
2282 AnnotateScopeToken(*SS, /*IsNewAnnotation*/false);
2283 return false;
2284
2285 default:
2286 // This is probably supposed to be a type. This includes cases like:
2287 // int f(itn);
2288 // struct S { unsinged : 4; };
2289 break;
2290 }
2291 }
2292
2293 // This is almost certainly an invalid type name. Let Sema emit a diagnostic
2294 // and attempt to recover.
2295 ParsedType T;
2296 IdentifierInfo *II = Tok.getIdentifierInfo();
2297 Actions.DiagnoseUnknownTypeName(II, Loc, getCurScope(), SS, T,
2298 getLangOpts().CPlusPlus &&
2299 NextToken().is(tok::less));
2300 if (T) {
2301 // The action has suggested that the type T could be used. Set that as
2302 // the type in the declaration specifiers, consume the would-be type
2303 // name token, and we're done.
2304 const char *PrevSpec;
2305 unsigned DiagID;
2306 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T,
2307 Actions.getASTContext().getPrintingPolicy());
2308 DS.SetRangeEnd(Tok.getLocation());
2309 ConsumeToken();
2310 // There may be other declaration specifiers after this.
2311 return true;
2312 } else if (II != Tok.getIdentifierInfo()) {
2313 // If no type was suggested, the correction is to a keyword
2314 Tok.setKind(II->getTokenID());
2315 // There may be other declaration specifiers after this.
2316 return true;
2317 }
2318
2319 // Otherwise, the action had no suggestion for us. Mark this as an error.
2320 DS.SetTypeSpecError();
2321 DS.SetRangeEnd(Tok.getLocation());
2322 ConsumeToken();
2323
2324 // TODO: Could inject an invalid typedef decl in an enclosing scope to
2325 // avoid rippling error messages on subsequent uses of the same type,
2326 // could be useful if #include was forgotten.
2327 return false;
2328 }
2329
2330 /// \brief Determine the declaration specifier context from the declarator
2331 /// context.
2332 ///
2333 /// \param Context the declarator context, which is one of the
2334 /// Declarator::TheContext enumerator values.
2335 Parser::DeclSpecContext
getDeclSpecContextFromDeclaratorContext(unsigned Context)2336 Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) {
2337 if (Context == Declarator::MemberContext)
2338 return DSC_class;
2339 if (Context == Declarator::FileContext)
2340 return DSC_top_level;
2341 if (Context == Declarator::TemplateTypeArgContext)
2342 return DSC_template_type_arg;
2343 if (Context == Declarator::TrailingReturnContext)
2344 return DSC_trailing;
2345 if (Context == Declarator::AliasDeclContext ||
2346 Context == Declarator::AliasTemplateContext)
2347 return DSC_alias_declaration;
2348 return DSC_normal;
2349 }
2350
2351 /// ParseAlignArgument - Parse the argument to an alignment-specifier.
2352 ///
2353 /// FIXME: Simply returns an alignof() expression if the argument is a
2354 /// type. Ideally, the type should be propagated directly into Sema.
2355 ///
2356 /// [C11] type-id
2357 /// [C11] constant-expression
2358 /// [C++0x] type-id ...[opt]
2359 /// [C++0x] assignment-expression ...[opt]
ParseAlignArgument(SourceLocation Start,SourceLocation & EllipsisLoc)2360 ExprResult Parser::ParseAlignArgument(SourceLocation Start,
2361 SourceLocation &EllipsisLoc) {
2362 ExprResult ER;
2363 if (isTypeIdInParens()) {
2364 SourceLocation TypeLoc = Tok.getLocation();
2365 ParsedType Ty = ParseTypeName().get();
2366 SourceRange TypeRange(Start, Tok.getLocation());
2367 ER = Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
2368 Ty.getAsOpaquePtr(), TypeRange);
2369 } else
2370 ER = ParseConstantExpression();
2371
2372 if (getLangOpts().CPlusPlus11)
2373 TryConsumeToken(tok::ellipsis, EllipsisLoc);
2374
2375 return ER;
2376 }
2377
2378 /// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
2379 /// attribute to Attrs.
2380 ///
2381 /// alignment-specifier:
2382 /// [C11] '_Alignas' '(' type-id ')'
2383 /// [C11] '_Alignas' '(' constant-expression ')'
2384 /// [C++11] 'alignas' '(' type-id ...[opt] ')'
2385 /// [C++11] 'alignas' '(' assignment-expression ...[opt] ')'
ParseAlignmentSpecifier(ParsedAttributes & Attrs,SourceLocation * EndLoc)2386 void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
2387 SourceLocation *EndLoc) {
2388 assert((Tok.is(tok::kw_alignas) || Tok.is(tok::kw__Alignas)) &&
2389 "Not an alignment-specifier!");
2390
2391 IdentifierInfo *KWName = Tok.getIdentifierInfo();
2392 SourceLocation KWLoc = ConsumeToken();
2393
2394 BalancedDelimiterTracker T(*this, tok::l_paren);
2395 if (T.expectAndConsume())
2396 return;
2397
2398 SourceLocation EllipsisLoc;
2399 ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation(), EllipsisLoc);
2400 if (ArgExpr.isInvalid()) {
2401 T.skipToEnd();
2402 return;
2403 }
2404
2405 T.consumeClose();
2406 if (EndLoc)
2407 *EndLoc = T.getCloseLocation();
2408
2409 ArgsVector ArgExprs;
2410 ArgExprs.push_back(ArgExpr.get());
2411 Attrs.addNew(KWName, KWLoc, nullptr, KWLoc, ArgExprs.data(), 1,
2412 AttributeList::AS_Keyword, EllipsisLoc);
2413 }
2414
2415 /// Determine whether we're looking at something that might be a declarator
2416 /// in a simple-declaration. If it can't possibly be a declarator, maybe
2417 /// diagnose a missing semicolon after a prior tag definition in the decl
2418 /// specifier.
2419 ///
2420 /// \return \c true if an error occurred and this can't be any kind of
2421 /// declaration.
2422 bool
DiagnoseMissingSemiAfterTagDefinition(DeclSpec & DS,AccessSpecifier AS,DeclSpecContext DSContext,LateParsedAttrList * LateAttrs)2423 Parser::DiagnoseMissingSemiAfterTagDefinition(DeclSpec &DS, AccessSpecifier AS,
2424 DeclSpecContext DSContext,
2425 LateParsedAttrList *LateAttrs) {
2426 assert(DS.hasTagDefinition() && "shouldn't call this");
2427
2428 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2429
2430 if (getLangOpts().CPlusPlus &&
2431 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
2432 Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id)) &&
2433 TryAnnotateCXXScopeToken(EnteringContext)) {
2434 SkipMalformedDecl();
2435 return true;
2436 }
2437
2438 bool HasScope = Tok.is(tok::annot_cxxscope);
2439 // Make a copy in case GetLookAheadToken invalidates the result of NextToken.
2440 Token AfterScope = HasScope ? NextToken() : Tok;
2441
2442 // Determine whether the following tokens could possibly be a
2443 // declarator.
2444 bool MightBeDeclarator = true;
2445 if (Tok.is(tok::kw_typename) || Tok.is(tok::annot_typename)) {
2446 // A declarator-id can't start with 'typename'.
2447 MightBeDeclarator = false;
2448 } else if (AfterScope.is(tok::annot_template_id)) {
2449 // If we have a type expressed as a template-id, this cannot be a
2450 // declarator-id (such a type cannot be redeclared in a simple-declaration).
2451 TemplateIdAnnotation *Annot =
2452 static_cast<TemplateIdAnnotation *>(AfterScope.getAnnotationValue());
2453 if (Annot->Kind == TNK_Type_template)
2454 MightBeDeclarator = false;
2455 } else if (AfterScope.is(tok::identifier)) {
2456 const Token &Next = HasScope ? GetLookAheadToken(2) : NextToken();
2457
2458 // These tokens cannot come after the declarator-id in a
2459 // simple-declaration, and are likely to come after a type-specifier.
2460 if (Next.is(tok::star) || Next.is(tok::amp) || Next.is(tok::ampamp) ||
2461 Next.is(tok::identifier) || Next.is(tok::annot_cxxscope) ||
2462 Next.is(tok::coloncolon)) {
2463 // Missing a semicolon.
2464 MightBeDeclarator = false;
2465 } else if (HasScope) {
2466 // If the declarator-id has a scope specifier, it must redeclare a
2467 // previously-declared entity. If that's a type (and this is not a
2468 // typedef), that's an error.
2469 CXXScopeSpec SS;
2470 Actions.RestoreNestedNameSpecifierAnnotation(
2471 Tok.getAnnotationValue(), Tok.getAnnotationRange(), SS);
2472 IdentifierInfo *Name = AfterScope.getIdentifierInfo();
2473 Sema::NameClassification Classification = Actions.ClassifyName(
2474 getCurScope(), SS, Name, AfterScope.getLocation(), Next,
2475 /*IsAddressOfOperand*/false);
2476 switch (Classification.getKind()) {
2477 case Sema::NC_Error:
2478 SkipMalformedDecl();
2479 return true;
2480
2481 case Sema::NC_Keyword:
2482 case Sema::NC_NestedNameSpecifier:
2483 llvm_unreachable("typo correction and nested name specifiers not "
2484 "possible here");
2485
2486 case Sema::NC_Type:
2487 case Sema::NC_TypeTemplate:
2488 // Not a previously-declared non-type entity.
2489 MightBeDeclarator = false;
2490 break;
2491
2492 case Sema::NC_Unknown:
2493 case Sema::NC_Expression:
2494 case Sema::NC_VarTemplate:
2495 case Sema::NC_FunctionTemplate:
2496 // Might be a redeclaration of a prior entity.
2497 break;
2498 }
2499 }
2500 }
2501
2502 if (MightBeDeclarator)
2503 return false;
2504
2505 const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
2506 Diag(PP.getLocForEndOfToken(DS.getRepAsDecl()->getLocEnd()),
2507 diag::err_expected_after)
2508 << DeclSpec::getSpecifierName(DS.getTypeSpecType(), PPol) << tok::semi;
2509
2510 // Try to recover from the typo, by dropping the tag definition and parsing
2511 // the problematic tokens as a type.
2512 //
2513 // FIXME: Split the DeclSpec into pieces for the standalone
2514 // declaration and pieces for the following declaration, instead
2515 // of assuming that all the other pieces attach to new declaration,
2516 // and call ParsedFreeStandingDeclSpec as appropriate.
2517 DS.ClearTypeSpecType();
2518 ParsedTemplateInfo NotATemplate;
2519 ParseDeclarationSpecifiers(DS, NotATemplate, AS, DSContext, LateAttrs);
2520 return false;
2521 }
2522
2523 /// ParseDeclarationSpecifiers
2524 /// declaration-specifiers: [C99 6.7]
2525 /// storage-class-specifier declaration-specifiers[opt]
2526 /// type-specifier declaration-specifiers[opt]
2527 /// [C99] function-specifier declaration-specifiers[opt]
2528 /// [C11] alignment-specifier declaration-specifiers[opt]
2529 /// [GNU] attributes declaration-specifiers[opt]
2530 /// [Clang] '__module_private__' declaration-specifiers[opt]
2531 ///
2532 /// storage-class-specifier: [C99 6.7.1]
2533 /// 'typedef'
2534 /// 'extern'
2535 /// 'static'
2536 /// 'auto'
2537 /// 'register'
2538 /// [C++] 'mutable'
2539 /// [C++11] 'thread_local'
2540 /// [C11] '_Thread_local'
2541 /// [GNU] '__thread'
2542 /// function-specifier: [C99 6.7.4]
2543 /// [C99] 'inline'
2544 /// [C++] 'virtual'
2545 /// [C++] 'explicit'
2546 /// [OpenCL] '__kernel'
2547 /// 'friend': [C++ dcl.friend]
2548 /// 'constexpr': [C++0x dcl.constexpr]
2549
2550 ///
ParseDeclarationSpecifiers(DeclSpec & DS,const ParsedTemplateInfo & TemplateInfo,AccessSpecifier AS,DeclSpecContext DSContext,LateParsedAttrList * LateAttrs)2551 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
2552 const ParsedTemplateInfo &TemplateInfo,
2553 AccessSpecifier AS,
2554 DeclSpecContext DSContext,
2555 LateParsedAttrList *LateAttrs) {
2556 if (DS.getSourceRange().isInvalid()) {
2557 // Start the range at the current token but make the end of the range
2558 // invalid. This will make the entire range invalid unless we successfully
2559 // consume a token.
2560 DS.SetRangeStart(Tok.getLocation());
2561 DS.SetRangeEnd(SourceLocation());
2562 }
2563
2564 bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
2565 bool AttrsLastTime = false;
2566 ParsedAttributesWithRange attrs(AttrFactory);
2567 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
2568 while (1) {
2569 bool isInvalid = false;
2570 bool isStorageClass = false;
2571 const char *PrevSpec = nullptr;
2572 unsigned DiagID = 0;
2573
2574 SourceLocation Loc = Tok.getLocation();
2575
2576 switch (Tok.getKind()) {
2577 default:
2578 DoneWithDeclSpec:
2579 if (!AttrsLastTime)
2580 ProhibitAttributes(attrs);
2581 else {
2582 // Reject C++11 attributes that appertain to decl specifiers as
2583 // we don't support any C++11 attributes that appertain to decl
2584 // specifiers. This also conforms to what g++ 4.8 is doing.
2585 ProhibitCXX11Attributes(attrs);
2586
2587 DS.takeAttributesFrom(attrs);
2588 }
2589
2590 // If this is not a declaration specifier token, we're done reading decl
2591 // specifiers. First verify that DeclSpec's are consistent.
2592 DS.Finish(Diags, PP, Policy);
2593 return;
2594
2595 case tok::l_square:
2596 case tok::kw_alignas:
2597 if (!getLangOpts().CPlusPlus11 || !isCXX11AttributeSpecifier())
2598 goto DoneWithDeclSpec;
2599
2600 ProhibitAttributes(attrs);
2601 // FIXME: It would be good to recover by accepting the attributes,
2602 // but attempting to do that now would cause serious
2603 // madness in terms of diagnostics.
2604 attrs.clear();
2605 attrs.Range = SourceRange();
2606
2607 ParseCXX11Attributes(attrs);
2608 AttrsLastTime = true;
2609 continue;
2610
2611 case tok::code_completion: {
2612 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
2613 if (DS.hasTypeSpecifier()) {
2614 bool AllowNonIdentifiers
2615 = (getCurScope()->getFlags() & (Scope::ControlScope |
2616 Scope::BlockScope |
2617 Scope::TemplateParamScope |
2618 Scope::FunctionPrototypeScope |
2619 Scope::AtCatchScope)) == 0;
2620 bool AllowNestedNameSpecifiers
2621 = DSContext == DSC_top_level ||
2622 (DSContext == DSC_class && DS.isFriendSpecified());
2623
2624 Actions.CodeCompleteDeclSpec(getCurScope(), DS,
2625 AllowNonIdentifiers,
2626 AllowNestedNameSpecifiers);
2627 return cutOffParsing();
2628 }
2629
2630 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
2631 CCC = Sema::PCC_LocalDeclarationSpecifiers;
2632 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
2633 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate
2634 : Sema::PCC_Template;
2635 else if (DSContext == DSC_class)
2636 CCC = Sema::PCC_Class;
2637 else if (CurParsedObjCImpl)
2638 CCC = Sema::PCC_ObjCImplementation;
2639
2640 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
2641 return cutOffParsing();
2642 }
2643
2644 case tok::coloncolon: // ::foo::bar
2645 // C++ scope specifier. Annotate and loop, or bail out on error.
2646 if (TryAnnotateCXXScopeToken(EnteringContext)) {
2647 if (!DS.hasTypeSpecifier())
2648 DS.SetTypeSpecError();
2649 goto DoneWithDeclSpec;
2650 }
2651 if (Tok.is(tok::coloncolon)) // ::new or ::delete
2652 goto DoneWithDeclSpec;
2653 continue;
2654
2655 case tok::annot_cxxscope: {
2656 if (DS.hasTypeSpecifier() || DS.isTypeAltiVecVector())
2657 goto DoneWithDeclSpec;
2658
2659 CXXScopeSpec SS;
2660 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
2661 Tok.getAnnotationRange(),
2662 SS);
2663
2664 // We are looking for a qualified typename.
2665 Token Next = NextToken();
2666 if (Next.is(tok::annot_template_id) &&
2667 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
2668 ->Kind == TNK_Type_template) {
2669 // We have a qualified template-id, e.g., N::A<int>
2670
2671 // C++ [class.qual]p2:
2672 // In a lookup in which the constructor is an acceptable lookup
2673 // result and the nested-name-specifier nominates a class C:
2674 //
2675 // - if the name specified after the
2676 // nested-name-specifier, when looked up in C, is the
2677 // injected-class-name of C (Clause 9), or
2678 //
2679 // - if the name specified after the nested-name-specifier
2680 // is the same as the identifier or the
2681 // simple-template-id's template-name in the last
2682 // component of the nested-name-specifier,
2683 //
2684 // the name is instead considered to name the constructor of
2685 // class C.
2686 //
2687 // Thus, if the template-name is actually the constructor
2688 // name, then the code is ill-formed; this interpretation is
2689 // reinforced by the NAD status of core issue 635.
2690 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
2691 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
2692 TemplateId->Name &&
2693 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
2694 if (isConstructorDeclarator(/*Unqualified*/false)) {
2695 // The user meant this to be an out-of-line constructor
2696 // definition, but template arguments are not allowed
2697 // there. Just allow this as a constructor; we'll
2698 // complain about it later.
2699 goto DoneWithDeclSpec;
2700 }
2701
2702 // The user meant this to name a type, but it actually names
2703 // a constructor with some extraneous template
2704 // arguments. Complain, then parse it as a type as the user
2705 // intended.
2706 Diag(TemplateId->TemplateNameLoc,
2707 diag::err_out_of_line_template_id_names_constructor)
2708 << TemplateId->Name;
2709 }
2710
2711 DS.getTypeSpecScope() = SS;
2712 ConsumeToken(); // The C++ scope.
2713 assert(Tok.is(tok::annot_template_id) &&
2714 "ParseOptionalCXXScopeSpecifier not working");
2715 AnnotateTemplateIdTokenAsType();
2716 continue;
2717 }
2718
2719 if (Next.is(tok::annot_typename)) {
2720 DS.getTypeSpecScope() = SS;
2721 ConsumeToken(); // The C++ scope.
2722 if (Tok.getAnnotationValue()) {
2723 ParsedType T = getTypeAnnotation(Tok);
2724 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
2725 Tok.getAnnotationEndLoc(),
2726 PrevSpec, DiagID, T, Policy);
2727 if (isInvalid)
2728 break;
2729 }
2730 else
2731 DS.SetTypeSpecError();
2732 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
2733 ConsumeToken(); // The typename
2734 }
2735
2736 if (Next.isNot(tok::identifier))
2737 goto DoneWithDeclSpec;
2738
2739 // If we're in a context where the identifier could be a class name,
2740 // check whether this is a constructor declaration.
2741 if ((DSContext == DSC_top_level || DSContext == DSC_class) &&
2742 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
2743 &SS)) {
2744 if (isConstructorDeclarator(/*Unqualified*/false))
2745 goto DoneWithDeclSpec;
2746
2747 // As noted in C++ [class.qual]p2 (cited above), when the name
2748 // of the class is qualified in a context where it could name
2749 // a constructor, its a constructor name. However, we've
2750 // looked at the declarator, and the user probably meant this
2751 // to be a type. Complain that it isn't supposed to be treated
2752 // as a type, then proceed to parse it as a type.
2753 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor)
2754 << Next.getIdentifierInfo();
2755 }
2756
2757 ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(),
2758 Next.getLocation(),
2759 getCurScope(), &SS,
2760 false, false, ParsedType(),
2761 /*IsCtorOrDtorName=*/false,
2762 /*NonTrivialSourceInfo=*/true);
2763
2764 // If the referenced identifier is not a type, then this declspec is
2765 // erroneous: We already checked about that it has no type specifier, and
2766 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
2767 // typename.
2768 if (!TypeRep) {
2769 ConsumeToken(); // Eat the scope spec so the identifier is current.
2770 ParsedAttributesWithRange Attrs(AttrFactory);
2771 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS, DSContext, Attrs)) {
2772 if (!Attrs.empty()) {
2773 AttrsLastTime = true;
2774 attrs.takeAllFrom(Attrs);
2775 }
2776 continue;
2777 }
2778 goto DoneWithDeclSpec;
2779 }
2780
2781 DS.getTypeSpecScope() = SS;
2782 ConsumeToken(); // The C++ scope.
2783
2784 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2785 DiagID, TypeRep, Policy);
2786 if (isInvalid)
2787 break;
2788
2789 DS.SetRangeEnd(Tok.getLocation());
2790 ConsumeToken(); // The typename.
2791
2792 continue;
2793 }
2794
2795 case tok::annot_typename: {
2796 // If we've previously seen a tag definition, we were almost surely
2797 // missing a semicolon after it.
2798 if (DS.hasTypeSpecifier() && DS.hasTagDefinition())
2799 goto DoneWithDeclSpec;
2800
2801 if (Tok.getAnnotationValue()) {
2802 ParsedType T = getTypeAnnotation(Tok);
2803 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2804 DiagID, T, Policy);
2805 } else
2806 DS.SetTypeSpecError();
2807
2808 if (isInvalid)
2809 break;
2810
2811 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
2812 ConsumeToken(); // The typename
2813
2814 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
2815 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
2816 // Objective-C interface.
2817 if (Tok.is(tok::less) && getLangOpts().ObjC1)
2818 ParseObjCProtocolQualifiers(DS);
2819
2820 continue;
2821 }
2822
2823 case tok::kw___is_signed:
2824 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
2825 // typically treats it as a trait. If we see __is_signed as it appears
2826 // in libstdc++, e.g.,
2827 //
2828 // static const bool __is_signed;
2829 //
2830 // then treat __is_signed as an identifier rather than as a keyword.
2831 if (DS.getTypeSpecType() == TST_bool &&
2832 DS.getTypeQualifiers() == DeclSpec::TQ_const &&
2833 DS.getStorageClassSpec() == DeclSpec::SCS_static)
2834 TryKeywordIdentFallback(true);
2835
2836 // We're done with the declaration-specifiers.
2837 goto DoneWithDeclSpec;
2838
2839 // typedef-name
2840 case tok::kw___super:
2841 case tok::kw_decltype:
2842 case tok::identifier: {
2843 // This identifier can only be a typedef name if we haven't already seen
2844 // a type-specifier. Without this check we misparse:
2845 // typedef int X; struct Y { short X; }; as 'short int'.
2846 if (DS.hasTypeSpecifier())
2847 goto DoneWithDeclSpec;
2848
2849 // In C++, check to see if this is a scope specifier like foo::bar::, if
2850 // so handle it as such. This is important for ctor parsing.
2851 if (getLangOpts().CPlusPlus) {
2852 if (TryAnnotateCXXScopeToken(EnteringContext)) {
2853 DS.SetTypeSpecError();
2854 goto DoneWithDeclSpec;
2855 }
2856 if (!Tok.is(tok::identifier))
2857 continue;
2858 }
2859
2860 // Check for need to substitute AltiVec keyword tokens.
2861 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
2862 break;
2863
2864 // [AltiVec] 2.2: [If the 'vector' specifier is used] The syntax does not
2865 // allow the use of a typedef name as a type specifier.
2866 if (DS.isTypeAltiVecVector())
2867 goto DoneWithDeclSpec;
2868
2869 ParsedType TypeRep =
2870 Actions.getTypeName(*Tok.getIdentifierInfo(),
2871 Tok.getLocation(), getCurScope());
2872
2873 // MSVC: If we weren't able to parse a default template argument, and it's
2874 // just a simple identifier, create a DependentNameType. This will allow us
2875 // to defer the name lookup to template instantiation time, as long we forge a
2876 // NestedNameSpecifier for the current context.
2877 if (!TypeRep && DSContext == DSC_template_type_arg &&
2878 getLangOpts().MSVCCompat && getCurScope()->isTemplateParamScope()) {
2879 TypeRep = Actions.ActOnDelayedDefaultTemplateArg(
2880 *Tok.getIdentifierInfo(), Tok.getLocation());
2881 }
2882
2883 // If this is not a typedef name, don't parse it as part of the declspec,
2884 // it must be an implicit int or an error.
2885 if (!TypeRep) {
2886 ParsedAttributesWithRange Attrs(AttrFactory);
2887 if (ParseImplicitInt(DS, nullptr, TemplateInfo, AS, DSContext, Attrs)) {
2888 if (!Attrs.empty()) {
2889 AttrsLastTime = true;
2890 attrs.takeAllFrom(Attrs);
2891 }
2892 continue;
2893 }
2894 goto DoneWithDeclSpec;
2895 }
2896
2897 // If we're in a context where the identifier could be a class name,
2898 // check whether this is a constructor declaration.
2899 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
2900 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
2901 isConstructorDeclarator(/*Unqualified*/true))
2902 goto DoneWithDeclSpec;
2903
2904 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
2905 DiagID, TypeRep, Policy);
2906 if (isInvalid)
2907 break;
2908
2909 DS.SetRangeEnd(Tok.getLocation());
2910 ConsumeToken(); // The identifier
2911
2912 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
2913 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
2914 // Objective-C interface.
2915 if (Tok.is(tok::less) && getLangOpts().ObjC1)
2916 ParseObjCProtocolQualifiers(DS);
2917
2918 // Need to support trailing type qualifiers (e.g. "id<p> const").
2919 // If a type specifier follows, it will be diagnosed elsewhere.
2920 continue;
2921 }
2922
2923 // type-name
2924 case tok::annot_template_id: {
2925 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
2926 if (TemplateId->Kind != TNK_Type_template) {
2927 // This template-id does not refer to a type name, so we're
2928 // done with the type-specifiers.
2929 goto DoneWithDeclSpec;
2930 }
2931
2932 // If we're in a context where the template-id could be a
2933 // constructor name or specialization, check whether this is a
2934 // constructor declaration.
2935 if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
2936 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
2937 isConstructorDeclarator(TemplateId->SS.isEmpty()))
2938 goto DoneWithDeclSpec;
2939
2940 // Turn the template-id annotation token into a type annotation
2941 // token, then try again to parse it as a type-specifier.
2942 AnnotateTemplateIdTokenAsType();
2943 continue;
2944 }
2945
2946 // GNU attributes support.
2947 case tok::kw___attribute:
2948 ParseGNUAttributes(DS.getAttributes(), nullptr, LateAttrs);
2949 continue;
2950
2951 // Microsoft declspec support.
2952 case tok::kw___declspec:
2953 ParseMicrosoftDeclSpec(DS.getAttributes());
2954 continue;
2955
2956 // Microsoft single token adornments.
2957 case tok::kw___forceinline: {
2958 isInvalid = DS.setFunctionSpecForceInline(Loc, PrevSpec, DiagID);
2959 IdentifierInfo *AttrName = Tok.getIdentifierInfo();
2960 SourceLocation AttrNameLoc = Tok.getLocation();
2961 DS.getAttributes().addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc,
2962 nullptr, 0, AttributeList::AS_Keyword);
2963 break;
2964 }
2965
2966 case tok::kw___sptr:
2967 case tok::kw___uptr:
2968 case tok::kw___ptr64:
2969 case tok::kw___ptr32:
2970 case tok::kw___w64:
2971 case tok::kw___cdecl:
2972 case tok::kw___stdcall:
2973 case tok::kw___fastcall:
2974 case tok::kw___thiscall:
2975 case tok::kw___vectorcall:
2976 case tok::kw___unaligned:
2977 ParseMicrosoftTypeAttributes(DS.getAttributes());
2978 continue;
2979
2980 // Borland single token adornments.
2981 case tok::kw___pascal:
2982 ParseBorlandTypeAttributes(DS.getAttributes());
2983 continue;
2984
2985 // OpenCL single token adornments.
2986 case tok::kw___kernel:
2987 ParseOpenCLAttributes(DS.getAttributes());
2988 continue;
2989
2990 // storage-class-specifier
2991 case tok::kw_typedef:
2992 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
2993 PrevSpec, DiagID, Policy);
2994 isStorageClass = true;
2995 break;
2996 case tok::kw_extern:
2997 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
2998 Diag(Tok, diag::ext_thread_before) << "extern";
2999 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
3000 PrevSpec, DiagID, Policy);
3001 isStorageClass = true;
3002 break;
3003 case tok::kw___private_extern__:
3004 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
3005 Loc, PrevSpec, DiagID, Policy);
3006 isStorageClass = true;
3007 break;
3008 case tok::kw_static:
3009 if (DS.getThreadStorageClassSpec() == DeclSpec::TSCS___thread)
3010 Diag(Tok, diag::ext_thread_before) << "static";
3011 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
3012 PrevSpec, DiagID, Policy);
3013 isStorageClass = true;
3014 break;
3015 case tok::kw_auto:
3016 if (getLangOpts().CPlusPlus11) {
3017 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
3018 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3019 PrevSpec, DiagID, Policy);
3020 if (!isInvalid)
3021 Diag(Tok, diag::ext_auto_storage_class)
3022 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
3023 } else
3024 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
3025 DiagID, Policy);
3026 } else
3027 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
3028 PrevSpec, DiagID, Policy);
3029 isStorageClass = true;
3030 break;
3031 case tok::kw_register:
3032 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
3033 PrevSpec, DiagID, Policy);
3034 isStorageClass = true;
3035 break;
3036 case tok::kw_mutable:
3037 isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
3038 PrevSpec, DiagID, Policy);
3039 isStorageClass = true;
3040 break;
3041 case tok::kw___thread:
3042 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS___thread, Loc,
3043 PrevSpec, DiagID);
3044 isStorageClass = true;
3045 break;
3046 case tok::kw_thread_local:
3047 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS_thread_local, Loc,
3048 PrevSpec, DiagID);
3049 break;
3050 case tok::kw__Thread_local:
3051 isInvalid = DS.SetStorageClassSpecThread(DeclSpec::TSCS__Thread_local,
3052 Loc, PrevSpec, DiagID);
3053 isStorageClass = true;
3054 break;
3055
3056 // function-specifier
3057 case tok::kw_inline:
3058 isInvalid = DS.setFunctionSpecInline(Loc, PrevSpec, DiagID);
3059 break;
3060 case tok::kw_virtual:
3061 isInvalid = DS.setFunctionSpecVirtual(Loc, PrevSpec, DiagID);
3062 break;
3063 case tok::kw_explicit:
3064 isInvalid = DS.setFunctionSpecExplicit(Loc, PrevSpec, DiagID);
3065 break;
3066 case tok::kw__Noreturn:
3067 if (!getLangOpts().C11)
3068 Diag(Loc, diag::ext_c11_noreturn);
3069 isInvalid = DS.setFunctionSpecNoreturn(Loc, PrevSpec, DiagID);
3070 break;
3071
3072 // alignment-specifier
3073 case tok::kw__Alignas:
3074 if (!getLangOpts().C11)
3075 Diag(Tok, diag::ext_c11_alignment) << Tok.getName();
3076 ParseAlignmentSpecifier(DS.getAttributes());
3077 continue;
3078
3079 // friend
3080 case tok::kw_friend:
3081 if (DSContext == DSC_class)
3082 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
3083 else {
3084 PrevSpec = ""; // not actually used by the diagnostic
3085 DiagID = diag::err_friend_invalid_in_context;
3086 isInvalid = true;
3087 }
3088 break;
3089
3090 // Modules
3091 case tok::kw___module_private__:
3092 isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
3093 break;
3094
3095 // constexpr
3096 case tok::kw_constexpr:
3097 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID);
3098 break;
3099
3100 // type-specifier
3101 case tok::kw_short:
3102 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
3103 DiagID, Policy);
3104 break;
3105 case tok::kw_long:
3106 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
3107 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
3108 DiagID, Policy);
3109 else
3110 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3111 DiagID, Policy);
3112 break;
3113 case tok::kw___int64:
3114 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
3115 DiagID, Policy);
3116 break;
3117 case tok::kw_signed:
3118 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
3119 DiagID);
3120 break;
3121 case tok::kw_unsigned:
3122 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
3123 DiagID);
3124 break;
3125 case tok::kw__Complex:
3126 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
3127 DiagID);
3128 break;
3129 case tok::kw__Imaginary:
3130 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
3131 DiagID);
3132 break;
3133 case tok::kw_void:
3134 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
3135 DiagID, Policy);
3136 break;
3137 case tok::kw_char:
3138 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
3139 DiagID, Policy);
3140 break;
3141 case tok::kw_int:
3142 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
3143 DiagID, Policy);
3144 break;
3145 case tok::kw___int128:
3146 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
3147 DiagID, Policy);
3148 break;
3149 case tok::kw_half:
3150 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
3151 DiagID, Policy);
3152 break;
3153 case tok::kw_float:
3154 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
3155 DiagID, Policy);
3156 break;
3157 case tok::kw_double:
3158 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
3159 DiagID, Policy);
3160 break;
3161 case tok::kw_wchar_t:
3162 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
3163 DiagID, Policy);
3164 break;
3165 case tok::kw_char16_t:
3166 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
3167 DiagID, Policy);
3168 break;
3169 case tok::kw_char32_t:
3170 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
3171 DiagID, Policy);
3172 break;
3173 case tok::kw_bool:
3174 case tok::kw__Bool:
3175 if (Tok.is(tok::kw_bool) &&
3176 DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
3177 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
3178 PrevSpec = ""; // Not used by the diagnostic.
3179 DiagID = diag::err_bool_redeclaration;
3180 // For better error recovery.
3181 Tok.setKind(tok::identifier);
3182 isInvalid = true;
3183 } else {
3184 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
3185 DiagID, Policy);
3186 }
3187 break;
3188 case tok::kw__Decimal32:
3189 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
3190 DiagID, Policy);
3191 break;
3192 case tok::kw__Decimal64:
3193 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
3194 DiagID, Policy);
3195 break;
3196 case tok::kw__Decimal128:
3197 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
3198 DiagID, Policy);
3199 break;
3200 case tok::kw___vector:
3201 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
3202 break;
3203 case tok::kw___pixel:
3204 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
3205 break;
3206 case tok::kw___bool:
3207 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);
3208 break;
3209 case tok::kw___unknown_anytype:
3210 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
3211 PrevSpec, DiagID, Policy);
3212 break;
3213
3214 // class-specifier:
3215 case tok::kw_class:
3216 case tok::kw_struct:
3217 case tok::kw___interface:
3218 case tok::kw_union: {
3219 tok::TokenKind Kind = Tok.getKind();
3220 ConsumeToken();
3221
3222 // These are attributes following class specifiers.
3223 // To produce better diagnostic, we parse them when
3224 // parsing class specifier.
3225 ParsedAttributesWithRange Attributes(AttrFactory);
3226 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS,
3227 EnteringContext, DSContext, Attributes);
3228
3229 // If there are attributes following class specifier,
3230 // take them over and handle them here.
3231 if (!Attributes.empty()) {
3232 AttrsLastTime = true;
3233 attrs.takeAllFrom(Attributes);
3234 }
3235 continue;
3236 }
3237
3238 // enum-specifier:
3239 case tok::kw_enum:
3240 ConsumeToken();
3241 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSContext);
3242 continue;
3243
3244 // cv-qualifier:
3245 case tok::kw_const:
3246 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
3247 getLangOpts());
3248 break;
3249 case tok::kw_volatile:
3250 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
3251 getLangOpts());
3252 break;
3253 case tok::kw_restrict:
3254 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
3255 getLangOpts());
3256 break;
3257
3258 // C++ typename-specifier:
3259 case tok::kw_typename:
3260 if (TryAnnotateTypeOrScopeToken()) {
3261 DS.SetTypeSpecError();
3262 goto DoneWithDeclSpec;
3263 }
3264 if (!Tok.is(tok::kw_typename))
3265 continue;
3266 break;
3267
3268 // GNU typeof support.
3269 case tok::kw_typeof:
3270 ParseTypeofSpecifier(DS);
3271 continue;
3272
3273 case tok::annot_decltype:
3274 ParseDecltypeSpecifier(DS);
3275 continue;
3276
3277 case tok::kw___underlying_type:
3278 ParseUnderlyingTypeSpecifier(DS);
3279 continue;
3280
3281 case tok::kw__Atomic:
3282 // C11 6.7.2.4/4:
3283 // If the _Atomic keyword is immediately followed by a left parenthesis,
3284 // it is interpreted as a type specifier (with a type name), not as a
3285 // type qualifier.
3286 if (NextToken().is(tok::l_paren)) {
3287 ParseAtomicSpecifier(DS);
3288 continue;
3289 }
3290 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
3291 getLangOpts());
3292 break;
3293
3294 // OpenCL qualifiers:
3295 case tok::kw___generic:
3296 // generic address space is introduced only in OpenCL v2.0
3297 // see OpenCL C Spec v2.0 s6.5.5
3298 if (Actions.getLangOpts().OpenCLVersion < 200) {
3299 DiagID = diag::err_opencl_unknown_type_specifier;
3300 PrevSpec = Tok.getIdentifierInfo()->getNameStart();
3301 isInvalid = true;
3302 break;
3303 };
3304 case tok::kw___private:
3305 case tok::kw___global:
3306 case tok::kw___local:
3307 case tok::kw___constant:
3308 case tok::kw___read_only:
3309 case tok::kw___write_only:
3310 case tok::kw___read_write:
3311 ParseOpenCLQualifiers(DS.getAttributes());
3312 break;
3313
3314 case tok::less:
3315 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
3316 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
3317 // but we support it.
3318 if (DS.hasTypeSpecifier() || !getLangOpts().ObjC1)
3319 goto DoneWithDeclSpec;
3320
3321 if (!ParseObjCProtocolQualifiers(DS))
3322 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
3323 << FixItHint::CreateInsertion(Loc, "id")
3324 << SourceRange(Loc, DS.getSourceRange().getEnd());
3325
3326 // Need to support trailing type qualifiers (e.g. "id<p> const").
3327 // If a type specifier follows, it will be diagnosed elsewhere.
3328 continue;
3329 }
3330 // If the specifier wasn't legal, issue a diagnostic.
3331 if (isInvalid) {
3332 assert(PrevSpec && "Method did not return previous specifier!");
3333 assert(DiagID);
3334
3335 if (DiagID == diag::ext_duplicate_declspec)
3336 Diag(Tok, DiagID)
3337 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation());
3338 else if (DiagID == diag::err_opencl_unknown_type_specifier)
3339 Diag(Tok, DiagID) << PrevSpec << isStorageClass;
3340 else
3341 Diag(Tok, DiagID) << PrevSpec;
3342 }
3343
3344 DS.SetRangeEnd(Tok.getLocation());
3345 if (DiagID != diag::err_bool_redeclaration)
3346 ConsumeToken();
3347
3348 AttrsLastTime = false;
3349 }
3350 }
3351
3352 /// ParseStructDeclaration - Parse a struct declaration without the terminating
3353 /// semicolon.
3354 ///
3355 /// struct-declaration:
3356 /// specifier-qualifier-list struct-declarator-list
3357 /// [GNU] __extension__ struct-declaration
3358 /// [GNU] specifier-qualifier-list
3359 /// struct-declarator-list:
3360 /// struct-declarator
3361 /// struct-declarator-list ',' struct-declarator
3362 /// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
3363 /// struct-declarator:
3364 /// declarator
3365 /// [GNU] declarator attributes[opt]
3366 /// declarator[opt] ':' constant-expression
3367 /// [GNU] declarator[opt] ':' constant-expression attributes[opt]
3368 ///
ParseStructDeclaration(ParsingDeclSpec & DS,llvm::function_ref<void (ParsingFieldDeclarator &)> FieldsCallback)3369 void Parser::ParseStructDeclaration(
3370 ParsingDeclSpec &DS,
3371 llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback) {
3372
3373 if (Tok.is(tok::kw___extension__)) {
3374 // __extension__ silences extension warnings in the subexpression.
3375 ExtensionRAIIObject O(Diags); // Use RAII to do this.
3376 ConsumeToken();
3377 return ParseStructDeclaration(DS, FieldsCallback);
3378 }
3379
3380 // Parse the common specifier-qualifiers-list piece.
3381 ParseSpecifierQualifierList(DS);
3382
3383 // If there are no declarators, this is a free-standing declaration
3384 // specifier. Let the actions module cope with it.
3385 if (Tok.is(tok::semi)) {
3386 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
3387 DS);
3388 DS.complete(TheDecl);
3389 return;
3390 }
3391
3392 // Read struct-declarators until we find the semicolon.
3393 bool FirstDeclarator = true;
3394 SourceLocation CommaLoc;
3395 while (1) {
3396 ParsingFieldDeclarator DeclaratorInfo(*this, DS);
3397 DeclaratorInfo.D.setCommaLoc(CommaLoc);
3398
3399 // Attributes are only allowed here on successive declarators.
3400 if (!FirstDeclarator)
3401 MaybeParseGNUAttributes(DeclaratorInfo.D);
3402
3403 /// struct-declarator: declarator
3404 /// struct-declarator: declarator[opt] ':' constant-expression
3405 if (Tok.isNot(tok::colon)) {
3406 // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
3407 ColonProtectionRAIIObject X(*this);
3408 ParseDeclarator(DeclaratorInfo.D);
3409 } else
3410 DeclaratorInfo.D.SetIdentifier(nullptr, Tok.getLocation());
3411
3412 if (TryConsumeToken(tok::colon)) {
3413 ExprResult Res(ParseConstantExpression());
3414 if (Res.isInvalid())
3415 SkipUntil(tok::semi, StopBeforeMatch);
3416 else
3417 DeclaratorInfo.BitfieldSize = Res.get();
3418 }
3419
3420 // If attributes exist after the declarator, parse them.
3421 MaybeParseGNUAttributes(DeclaratorInfo.D);
3422
3423 // We're done with this declarator; invoke the callback.
3424 FieldsCallback(DeclaratorInfo);
3425
3426 // If we don't have a comma, it is either the end of the list (a ';')
3427 // or an error, bail out.
3428 if (!TryConsumeToken(tok::comma, CommaLoc))
3429 return;
3430
3431 FirstDeclarator = false;
3432 }
3433 }
3434
3435 /// ParseStructUnionBody
3436 /// struct-contents:
3437 /// struct-declaration-list
3438 /// [EXT] empty
3439 /// [GNU] "struct-declaration-list" without terminatoring ';'
3440 /// struct-declaration-list:
3441 /// struct-declaration
3442 /// struct-declaration-list struct-declaration
3443 /// [OBC] '@' 'defs' '(' class-name ')'
3444 ///
ParseStructUnionBody(SourceLocation RecordLoc,unsigned TagType,Decl * TagDecl)3445 void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
3446 unsigned TagType, Decl *TagDecl) {
3447 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
3448 "parsing struct/union body");
3449 assert(!getLangOpts().CPlusPlus && "C++ declarations not supported");
3450
3451 BalancedDelimiterTracker T(*this, tok::l_brace);
3452 if (T.consumeOpen())
3453 return;
3454
3455 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
3456 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
3457
3458 SmallVector<Decl *, 32> FieldDecls;
3459
3460 // While we still have something to read, read the declarations in the struct.
3461 while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
3462 // Each iteration of this loop reads one struct-declaration.
3463
3464 // Check for extraneous top-level semicolon.
3465 if (Tok.is(tok::semi)) {
3466 ConsumeExtraSemi(InsideStruct, TagType);
3467 continue;
3468 }
3469
3470 // Parse _Static_assert declaration.
3471 if (Tok.is(tok::kw__Static_assert)) {
3472 SourceLocation DeclEnd;
3473 ParseStaticAssertDeclaration(DeclEnd);
3474 continue;
3475 }
3476
3477 if (Tok.is(tok::annot_pragma_pack)) {
3478 HandlePragmaPack();
3479 continue;
3480 }
3481
3482 if (Tok.is(tok::annot_pragma_align)) {
3483 HandlePragmaAlign();
3484 continue;
3485 }
3486
3487 if (!Tok.is(tok::at)) {
3488 auto CFieldCallback = [&](ParsingFieldDeclarator &FD) {
3489 // Install the declarator into the current TagDecl.
3490 Decl *Field =
3491 Actions.ActOnField(getCurScope(), TagDecl,
3492 FD.D.getDeclSpec().getSourceRange().getBegin(),
3493 FD.D, FD.BitfieldSize);
3494 FieldDecls.push_back(Field);
3495 FD.complete(Field);
3496 };
3497
3498 // Parse all the comma separated declarators.
3499 ParsingDeclSpec DS(*this);
3500 ParseStructDeclaration(DS, CFieldCallback);
3501 } else { // Handle @defs
3502 ConsumeToken();
3503 if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
3504 Diag(Tok, diag::err_unexpected_at);
3505 SkipUntil(tok::semi);
3506 continue;
3507 }
3508 ConsumeToken();
3509 ExpectAndConsume(tok::l_paren);
3510 if (!Tok.is(tok::identifier)) {
3511 Diag(Tok, diag::err_expected) << tok::identifier;
3512 SkipUntil(tok::semi);
3513 continue;
3514 }
3515 SmallVector<Decl *, 16> Fields;
3516 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
3517 Tok.getIdentifierInfo(), Fields);
3518 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
3519 ConsumeToken();
3520 ExpectAndConsume(tok::r_paren);
3521 }
3522
3523 if (TryConsumeToken(tok::semi))
3524 continue;
3525
3526 if (Tok.is(tok::r_brace)) {
3527 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
3528 break;
3529 }
3530
3531 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
3532 // Skip to end of block or statement to avoid ext-warning on extra ';'.
3533 SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
3534 // If we stopped at a ';', eat it.
3535 TryConsumeToken(tok::semi);
3536 }
3537
3538 T.consumeClose();
3539
3540 ParsedAttributes attrs(AttrFactory);
3541 // If attributes exist after struct contents, parse them.
3542 MaybeParseGNUAttributes(attrs);
3543
3544 Actions.ActOnFields(getCurScope(),
3545 RecordLoc, TagDecl, FieldDecls,
3546 T.getOpenLocation(), T.getCloseLocation(),
3547 attrs.getList());
3548 StructScope.Exit();
3549 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl,
3550 T.getCloseLocation());
3551 }
3552
3553 /// ParseEnumSpecifier
3554 /// enum-specifier: [C99 6.7.2.2]
3555 /// 'enum' identifier[opt] '{' enumerator-list '}'
3556 ///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
3557 /// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
3558 /// '}' attributes[opt]
3559 /// [MS] 'enum' __declspec[opt] identifier[opt] '{' enumerator-list ',' [opt]
3560 /// '}'
3561 /// 'enum' identifier
3562 /// [GNU] 'enum' attributes[opt] identifier
3563 ///
3564 /// [C++11] enum-head '{' enumerator-list[opt] '}'
3565 /// [C++11] enum-head '{' enumerator-list ',' '}'
3566 ///
3567 /// enum-head: [C++11]
3568 /// enum-key attribute-specifier-seq[opt] identifier[opt] enum-base[opt]
3569 /// enum-key attribute-specifier-seq[opt] nested-name-specifier
3570 /// identifier enum-base[opt]
3571 ///
3572 /// enum-key: [C++11]
3573 /// 'enum'
3574 /// 'enum' 'class'
3575 /// 'enum' 'struct'
3576 ///
3577 /// enum-base: [C++11]
3578 /// ':' type-specifier-seq
3579 ///
3580 /// [C++] elaborated-type-specifier:
3581 /// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
3582 ///
ParseEnumSpecifier(SourceLocation StartLoc,DeclSpec & DS,const ParsedTemplateInfo & TemplateInfo,AccessSpecifier AS,DeclSpecContext DSC)3583 void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
3584 const ParsedTemplateInfo &TemplateInfo,
3585 AccessSpecifier AS, DeclSpecContext DSC) {
3586 // Parse the tag portion of this.
3587 if (Tok.is(tok::code_completion)) {
3588 // Code completion for an enum name.
3589 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
3590 return cutOffParsing();
3591 }
3592
3593 // If attributes exist after tag, parse them.
3594 ParsedAttributesWithRange attrs(AttrFactory);
3595 MaybeParseGNUAttributes(attrs);
3596 MaybeParseCXX11Attributes(attrs);
3597
3598 // If declspecs exist after tag, parse them.
3599 while (Tok.is(tok::kw___declspec))
3600 ParseMicrosoftDeclSpec(attrs);
3601
3602 SourceLocation ScopedEnumKWLoc;
3603 bool IsScopedUsingClassTag = false;
3604
3605 // In C++11, recognize 'enum class' and 'enum struct'.
3606 if (Tok.is(tok::kw_class) || Tok.is(tok::kw_struct)) {
3607 Diag(Tok, getLangOpts().CPlusPlus11 ? diag::warn_cxx98_compat_scoped_enum
3608 : diag::ext_scoped_enum);
3609 IsScopedUsingClassTag = Tok.is(tok::kw_class);
3610 ScopedEnumKWLoc = ConsumeToken();
3611
3612 // Attributes are not allowed between these keywords. Diagnose,
3613 // but then just treat them like they appeared in the right place.
3614 ProhibitAttributes(attrs);
3615
3616 // They are allowed afterwards, though.
3617 MaybeParseGNUAttributes(attrs);
3618 MaybeParseCXX11Attributes(attrs);
3619 while (Tok.is(tok::kw___declspec))
3620 ParseMicrosoftDeclSpec(attrs);
3621 }
3622
3623 // C++11 [temp.explicit]p12:
3624 // The usual access controls do not apply to names used to specify
3625 // explicit instantiations.
3626 // We extend this to also cover explicit specializations. Note that
3627 // we don't suppress if this turns out to be an elaborated type
3628 // specifier.
3629 bool shouldDelayDiagsInTag =
3630 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
3631 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
3632 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
3633
3634 // Enum definitions should not be parsed in a trailing-return-type.
3635 bool AllowDeclaration = DSC != DSC_trailing;
3636
3637 bool AllowFixedUnderlyingType = AllowDeclaration &&
3638 (getLangOpts().CPlusPlus11 || getLangOpts().MicrosoftExt ||
3639 getLangOpts().ObjC2);
3640
3641 CXXScopeSpec &SS = DS.getTypeSpecScope();
3642 if (getLangOpts().CPlusPlus) {
3643 // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
3644 // if a fixed underlying type is allowed.
3645 ColonProtectionRAIIObject X(*this, AllowFixedUnderlyingType);
3646
3647 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
3648 /*EnteringContext=*/true))
3649 return;
3650
3651 if (SS.isSet() && Tok.isNot(tok::identifier)) {
3652 Diag(Tok, diag::err_expected) << tok::identifier;
3653 if (Tok.isNot(tok::l_brace)) {
3654 // Has no name and is not a definition.
3655 // Skip the rest of this declarator, up until the comma or semicolon.
3656 SkipUntil(tok::comma, StopAtSemi);
3657 return;
3658 }
3659 }
3660 }
3661
3662 // Must have either 'enum name' or 'enum {...}'.
3663 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
3664 !(AllowFixedUnderlyingType && Tok.is(tok::colon))) {
3665 Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
3666
3667 // Skip the rest of this declarator, up until the comma or semicolon.
3668 SkipUntil(tok::comma, StopAtSemi);
3669 return;
3670 }
3671
3672 // If an identifier is present, consume and remember it.
3673 IdentifierInfo *Name = nullptr;
3674 SourceLocation NameLoc;
3675 if (Tok.is(tok::identifier)) {
3676 Name = Tok.getIdentifierInfo();
3677 NameLoc = ConsumeToken();
3678 }
3679
3680 if (!Name && ScopedEnumKWLoc.isValid()) {
3681 // C++0x 7.2p2: The optional identifier shall not be omitted in the
3682 // declaration of a scoped enumeration.
3683 Diag(Tok, diag::err_scoped_enum_missing_identifier);
3684 ScopedEnumKWLoc = SourceLocation();
3685 IsScopedUsingClassTag = false;
3686 }
3687
3688 // Okay, end the suppression area. We'll decide whether to emit the
3689 // diagnostics in a second.
3690 if (shouldDelayDiagsInTag)
3691 diagsFromTag.done();
3692
3693 TypeResult BaseType;
3694
3695 // Parse the fixed underlying type.
3696 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
3697 if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
3698 bool PossibleBitfield = false;
3699 if (CanBeBitfield) {
3700 // If we're in class scope, this can either be an enum declaration with
3701 // an underlying type, or a declaration of a bitfield member. We try to
3702 // use a simple disambiguation scheme first to catch the common cases
3703 // (integer literal, sizeof); if it's still ambiguous, we then consider
3704 // anything that's a simple-type-specifier followed by '(' as an
3705 // expression. This suffices because function types are not valid
3706 // underlying types anyway.
3707 EnterExpressionEvaluationContext Unevaluated(Actions,
3708 Sema::ConstantEvaluated);
3709 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
3710 // If the next token starts an expression, we know we're parsing a
3711 // bit-field. This is the common case.
3712 if (TPR == TPResult::True)
3713 PossibleBitfield = true;
3714 // If the next token starts a type-specifier-seq, it may be either a
3715 // a fixed underlying type or the start of a function-style cast in C++;
3716 // lookahead one more token to see if it's obvious that we have a
3717 // fixed underlying type.
3718 else if (TPR == TPResult::False &&
3719 GetLookAheadToken(2).getKind() == tok::semi) {
3720 // Consume the ':'.
3721 ConsumeToken();
3722 } else {
3723 // We have the start of a type-specifier-seq, so we have to perform
3724 // tentative parsing to determine whether we have an expression or a
3725 // type.
3726 TentativeParsingAction TPA(*this);
3727
3728 // Consume the ':'.
3729 ConsumeToken();
3730
3731 // If we see a type specifier followed by an open-brace, we have an
3732 // ambiguity between an underlying type and a C++11 braced
3733 // function-style cast. Resolve this by always treating it as an
3734 // underlying type.
3735 // FIXME: The standard is not entirely clear on how to disambiguate in
3736 // this case.
3737 if ((getLangOpts().CPlusPlus &&
3738 isCXXDeclarationSpecifier(TPResult::True) != TPResult::True) ||
3739 (!getLangOpts().CPlusPlus && !isDeclarationSpecifier(true))) {
3740 // We'll parse this as a bitfield later.
3741 PossibleBitfield = true;
3742 TPA.Revert();
3743 } else {
3744 // We have a type-specifier-seq.
3745 TPA.Commit();
3746 }
3747 }
3748 } else {
3749 // Consume the ':'.
3750 ConsumeToken();
3751 }
3752
3753 if (!PossibleBitfield) {
3754 SourceRange Range;
3755 BaseType = ParseTypeName(&Range);
3756
3757 if (getLangOpts().CPlusPlus11) {
3758 Diag(StartLoc, diag::warn_cxx98_compat_enum_fixed_underlying_type);
3759 } else if (!getLangOpts().ObjC2) {
3760 if (getLangOpts().CPlusPlus)
3761 Diag(StartLoc, diag::ext_cxx11_enum_fixed_underlying_type) << Range;
3762 else
3763 Diag(StartLoc, diag::ext_c_enum_fixed_underlying_type) << Range;
3764 }
3765 }
3766 }
3767
3768 // There are four options here. If we have 'friend enum foo;' then this is a
3769 // friend declaration, and cannot have an accompanying definition. If we have
3770 // 'enum foo;', then this is a forward declaration. If we have
3771 // 'enum foo {...' then this is a definition. Otherwise we have something
3772 // like 'enum foo xyz', a reference.
3773 //
3774 // This is needed to handle stuff like this right (C99 6.7.2.3p11):
3775 // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
3776 // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
3777 //
3778 Sema::TagUseKind TUK;
3779 if (!AllowDeclaration) {
3780 TUK = Sema::TUK_Reference;
3781 } else if (Tok.is(tok::l_brace)) {
3782 if (DS.isFriendSpecified()) {
3783 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
3784 << SourceRange(DS.getFriendSpecLoc());
3785 ConsumeBrace();
3786 SkipUntil(tok::r_brace, StopAtSemi);
3787 TUK = Sema::TUK_Friend;
3788 } else {
3789 TUK = Sema::TUK_Definition;
3790 }
3791 } else if (!isTypeSpecifier(DSC) &&
3792 (Tok.is(tok::semi) ||
3793 (Tok.isAtStartOfLine() &&
3794 !isValidAfterTypeSpecifier(CanBeBitfield)))) {
3795 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
3796 if (Tok.isNot(tok::semi)) {
3797 // A semicolon was missing after this declaration. Diagnose and recover.
3798 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
3799 PP.EnterToken(Tok);
3800 Tok.setKind(tok::semi);
3801 }
3802 } else {
3803 TUK = Sema::TUK_Reference;
3804 }
3805
3806 // If this is an elaborated type specifier, and we delayed
3807 // diagnostics before, just merge them into the current pool.
3808 if (TUK == Sema::TUK_Reference && shouldDelayDiagsInTag) {
3809 diagsFromTag.redelay();
3810 }
3811
3812 MultiTemplateParamsArg TParams;
3813 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
3814 TUK != Sema::TUK_Reference) {
3815 if (!getLangOpts().CPlusPlus11 || !SS.isSet()) {
3816 // Skip the rest of this declarator, up until the comma or semicolon.
3817 Diag(Tok, diag::err_enum_template);
3818 SkipUntil(tok::comma, StopAtSemi);
3819 return;
3820 }
3821
3822 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
3823 // Enumerations can't be explicitly instantiated.
3824 DS.SetTypeSpecError();
3825 Diag(StartLoc, diag::err_explicit_instantiation_enum);
3826 return;
3827 }
3828
3829 assert(TemplateInfo.TemplateParams && "no template parameters");
3830 TParams = MultiTemplateParamsArg(TemplateInfo.TemplateParams->data(),
3831 TemplateInfo.TemplateParams->size());
3832 }
3833
3834 if (TUK == Sema::TUK_Reference)
3835 ProhibitAttributes(attrs);
3836
3837 if (!Name && TUK != Sema::TUK_Definition) {
3838 Diag(Tok, diag::err_enumerator_unnamed_no_def);
3839
3840 // Skip the rest of this declarator, up until the comma or semicolon.
3841 SkipUntil(tok::comma, StopAtSemi);
3842 return;
3843 }
3844
3845 bool Owned = false;
3846 bool IsDependent = false;
3847 const char *PrevSpec = nullptr;
3848 unsigned DiagID;
3849 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK,
3850 StartLoc, SS, Name, NameLoc, attrs.getList(),
3851 AS, DS.getModulePrivateSpecLoc(), TParams,
3852 Owned, IsDependent, ScopedEnumKWLoc,
3853 IsScopedUsingClassTag, BaseType,
3854 DSC == DSC_type_specifier);
3855
3856 if (IsDependent) {
3857 // This enum has a dependent nested-name-specifier. Handle it as a
3858 // dependent tag.
3859 if (!Name) {
3860 DS.SetTypeSpecError();
3861 Diag(Tok, diag::err_expected_type_name_after_typename);
3862 return;
3863 }
3864
3865 TypeResult Type = Actions.ActOnDependentTag(
3866 getCurScope(), DeclSpec::TST_enum, TUK, SS, Name, StartLoc, NameLoc);
3867 if (Type.isInvalid()) {
3868 DS.SetTypeSpecError();
3869 return;
3870 }
3871
3872 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
3873 NameLoc.isValid() ? NameLoc : StartLoc,
3874 PrevSpec, DiagID, Type.get(),
3875 Actions.getASTContext().getPrintingPolicy()))
3876 Diag(StartLoc, DiagID) << PrevSpec;
3877
3878 return;
3879 }
3880
3881 if (!TagDecl) {
3882 // The action failed to produce an enumeration tag. If this is a
3883 // definition, consume the entire definition.
3884 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
3885 ConsumeBrace();
3886 SkipUntil(tok::r_brace, StopAtSemi);
3887 }
3888
3889 DS.SetTypeSpecError();
3890 return;
3891 }
3892
3893 if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference)
3894 ParseEnumBody(StartLoc, TagDecl);
3895
3896 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
3897 NameLoc.isValid() ? NameLoc : StartLoc,
3898 PrevSpec, DiagID, TagDecl, Owned,
3899 Actions.getASTContext().getPrintingPolicy()))
3900 Diag(StartLoc, DiagID) << PrevSpec;
3901 }
3902
3903 /// ParseEnumBody - Parse a {} enclosed enumerator-list.
3904 /// enumerator-list:
3905 /// enumerator
3906 /// enumerator-list ',' enumerator
3907 /// enumerator:
3908 /// enumeration-constant attributes[opt]
3909 /// enumeration-constant attributes[opt] '=' constant-expression
3910 /// enumeration-constant:
3911 /// identifier
3912 ///
ParseEnumBody(SourceLocation StartLoc,Decl * EnumDecl)3913 void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
3914 // Enter the scope of the enum body and start the definition.
3915 ParseScope EnumScope(this, Scope::DeclScope | Scope::EnumScope);
3916 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
3917
3918 BalancedDelimiterTracker T(*this, tok::l_brace);
3919 T.consumeOpen();
3920
3921 // C does not allow an empty enumerator-list, C++ does [dcl.enum].
3922 if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus)
3923 Diag(Tok, diag::error_empty_enum);
3924
3925 SmallVector<Decl *, 32> EnumConstantDecls;
3926
3927 Decl *LastEnumConstDecl = nullptr;
3928
3929 // Parse the enumerator-list.
3930 while (Tok.isNot(tok::r_brace)) {
3931 // Parse enumerator. If failed, try skipping till the start of the next
3932 // enumerator definition.
3933 if (Tok.isNot(tok::identifier)) {
3934 Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
3935 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch) &&
3936 TryConsumeToken(tok::comma))
3937 continue;
3938 break;
3939 }
3940 IdentifierInfo *Ident = Tok.getIdentifierInfo();
3941 SourceLocation IdentLoc = ConsumeToken();
3942
3943 // If attributes exist after the enumerator, parse them.
3944 ParsedAttributesWithRange attrs(AttrFactory);
3945 MaybeParseGNUAttributes(attrs);
3946 ProhibitAttributes(attrs); // GNU-style attributes are prohibited.
3947 if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
3948 if (!getLangOpts().CPlusPlus1z)
3949 Diag(Tok.getLocation(), diag::warn_cxx14_compat_attribute)
3950 << 1 /*enumerator*/;
3951 ParseCXX11Attributes(attrs);
3952 }
3953
3954 SourceLocation EqualLoc;
3955 ExprResult AssignedVal;
3956 ParsingDeclRAIIObject PD(*this, ParsingDeclRAIIObject::NoParent);
3957
3958 if (TryConsumeToken(tok::equal, EqualLoc)) {
3959 AssignedVal = ParseConstantExpression();
3960 if (AssignedVal.isInvalid())
3961 SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch);
3962 }
3963
3964 // Install the enumerator constant into EnumDecl.
3965 Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl,
3966 LastEnumConstDecl,
3967 IdentLoc, Ident,
3968 attrs.getList(), EqualLoc,
3969 AssignedVal.get());
3970 PD.complete(EnumConstDecl);
3971
3972 EnumConstantDecls.push_back(EnumConstDecl);
3973 LastEnumConstDecl = EnumConstDecl;
3974
3975 if (Tok.is(tok::identifier)) {
3976 // We're missing a comma between enumerators.
3977 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
3978 Diag(Loc, diag::err_enumerator_list_missing_comma)
3979 << FixItHint::CreateInsertion(Loc, ", ");
3980 continue;
3981 }
3982
3983 // Emumerator definition must be finished, only comma or r_brace are
3984 // allowed here.
3985 SourceLocation CommaLoc;
3986 if (Tok.isNot(tok::r_brace) && !TryConsumeToken(tok::comma, CommaLoc)) {
3987 if (EqualLoc.isValid())
3988 Diag(Tok.getLocation(), diag::err_expected_either) << tok::r_brace
3989 << tok::comma;
3990 else
3991 Diag(Tok.getLocation(), diag::err_expected_end_of_enumerator);
3992 if (SkipUntil(tok::comma, tok::r_brace, StopBeforeMatch)) {
3993 if (TryConsumeToken(tok::comma, CommaLoc))
3994 continue;
3995 } else {
3996 break;
3997 }
3998 }
3999
4000 // If comma is followed by r_brace, emit appropriate warning.
4001 if (Tok.is(tok::r_brace) && CommaLoc.isValid()) {
4002 if (!getLangOpts().C99 && !getLangOpts().CPlusPlus11)
4003 Diag(CommaLoc, getLangOpts().CPlusPlus ?
4004 diag::ext_enumerator_list_comma_cxx :
4005 diag::ext_enumerator_list_comma_c)
4006 << FixItHint::CreateRemoval(CommaLoc);
4007 else if (getLangOpts().CPlusPlus11)
4008 Diag(CommaLoc, diag::warn_cxx98_compat_enumerator_list_comma)
4009 << FixItHint::CreateRemoval(CommaLoc);
4010 break;
4011 }
4012 }
4013
4014 // Eat the }.
4015 T.consumeClose();
4016
4017 // If attributes exist after the identifier list, parse them.
4018 ParsedAttributes attrs(AttrFactory);
4019 MaybeParseGNUAttributes(attrs);
4020
4021 Actions.ActOnEnumBody(StartLoc, T.getOpenLocation(), T.getCloseLocation(),
4022 EnumDecl, EnumConstantDecls,
4023 getCurScope(),
4024 attrs.getList());
4025
4026 EnumScope.Exit();
4027 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl,
4028 T.getCloseLocation());
4029
4030 // The next token must be valid after an enum definition. If not, a ';'
4031 // was probably forgotten.
4032 bool CanBeBitfield = getCurScope()->getFlags() & Scope::ClassScope;
4033 if (!isValidAfterTypeSpecifier(CanBeBitfield)) {
4034 ExpectAndConsume(tok::semi, diag::err_expected_after, "enum");
4035 // Push this token back into the preprocessor and change our current token
4036 // to ';' so that the rest of the code recovers as though there were an
4037 // ';' after the definition.
4038 PP.EnterToken(Tok);
4039 Tok.setKind(tok::semi);
4040 }
4041 }
4042
4043 /// isTypeSpecifierQualifier - Return true if the current token could be the
4044 /// start of a type-qualifier-list.
isTypeQualifier() const4045 bool Parser::isTypeQualifier() const {
4046 switch (Tok.getKind()) {
4047 default: return false;
4048 // type-qualifier
4049 case tok::kw_const:
4050 case tok::kw_volatile:
4051 case tok::kw_restrict:
4052 case tok::kw___private:
4053 case tok::kw___local:
4054 case tok::kw___global:
4055 case tok::kw___constant:
4056 case tok::kw___generic:
4057 case tok::kw___read_only:
4058 case tok::kw___read_write:
4059 case tok::kw___write_only:
4060 return true;
4061 }
4062 }
4063
4064 /// isKnownToBeTypeSpecifier - Return true if we know that the specified token
4065 /// is definitely a type-specifier. Return false if it isn't part of a type
4066 /// specifier or if we're not sure.
isKnownToBeTypeSpecifier(const Token & Tok) const4067 bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
4068 switch (Tok.getKind()) {
4069 default: return false;
4070 // type-specifiers
4071 case tok::kw_short:
4072 case tok::kw_long:
4073 case tok::kw___int64:
4074 case tok::kw___int128:
4075 case tok::kw_signed:
4076 case tok::kw_unsigned:
4077 case tok::kw__Complex:
4078 case tok::kw__Imaginary:
4079 case tok::kw_void:
4080 case tok::kw_char:
4081 case tok::kw_wchar_t:
4082 case tok::kw_char16_t:
4083 case tok::kw_char32_t:
4084 case tok::kw_int:
4085 case tok::kw_half:
4086 case tok::kw_float:
4087 case tok::kw_double:
4088 case tok::kw_bool:
4089 case tok::kw__Bool:
4090 case tok::kw__Decimal32:
4091 case tok::kw__Decimal64:
4092 case tok::kw__Decimal128:
4093 case tok::kw___vector:
4094
4095 // struct-or-union-specifier (C99) or class-specifier (C++)
4096 case tok::kw_class:
4097 case tok::kw_struct:
4098 case tok::kw___interface:
4099 case tok::kw_union:
4100 // enum-specifier
4101 case tok::kw_enum:
4102
4103 // typedef-name
4104 case tok::annot_typename:
4105 return true;
4106 }
4107 }
4108
4109 /// isTypeSpecifierQualifier - Return true if the current token could be the
4110 /// start of a specifier-qualifier-list.
isTypeSpecifierQualifier()4111 bool Parser::isTypeSpecifierQualifier() {
4112 switch (Tok.getKind()) {
4113 default: return false;
4114
4115 case tok::identifier: // foo::bar
4116 if (TryAltiVecVectorToken())
4117 return true;
4118 // Fall through.
4119 case tok::kw_typename: // typename T::type
4120 // Annotate typenames and C++ scope specifiers. If we get one, just
4121 // recurse to handle whatever we get.
4122 if (TryAnnotateTypeOrScopeToken())
4123 return true;
4124 if (Tok.is(tok::identifier))
4125 return false;
4126 return isTypeSpecifierQualifier();
4127
4128 case tok::coloncolon: // ::foo::bar
4129 if (NextToken().is(tok::kw_new) || // ::new
4130 NextToken().is(tok::kw_delete)) // ::delete
4131 return false;
4132
4133 if (TryAnnotateTypeOrScopeToken())
4134 return true;
4135 return isTypeSpecifierQualifier();
4136
4137 // GNU attributes support.
4138 case tok::kw___attribute:
4139 // GNU typeof support.
4140 case tok::kw_typeof:
4141
4142 // type-specifiers
4143 case tok::kw_short:
4144 case tok::kw_long:
4145 case tok::kw___int64:
4146 case tok::kw___int128:
4147 case tok::kw_signed:
4148 case tok::kw_unsigned:
4149 case tok::kw__Complex:
4150 case tok::kw__Imaginary:
4151 case tok::kw_void:
4152 case tok::kw_char:
4153 case tok::kw_wchar_t:
4154 case tok::kw_char16_t:
4155 case tok::kw_char32_t:
4156 case tok::kw_int:
4157 case tok::kw_half:
4158 case tok::kw_float:
4159 case tok::kw_double:
4160 case tok::kw_bool:
4161 case tok::kw__Bool:
4162 case tok::kw__Decimal32:
4163 case tok::kw__Decimal64:
4164 case tok::kw__Decimal128:
4165 case tok::kw___vector:
4166
4167 // struct-or-union-specifier (C99) or class-specifier (C++)
4168 case tok::kw_class:
4169 case tok::kw_struct:
4170 case tok::kw___interface:
4171 case tok::kw_union:
4172 // enum-specifier
4173 case tok::kw_enum:
4174
4175 // type-qualifier
4176 case tok::kw_const:
4177 case tok::kw_volatile:
4178 case tok::kw_restrict:
4179
4180 // Debugger support.
4181 case tok::kw___unknown_anytype:
4182
4183 // typedef-name
4184 case tok::annot_typename:
4185 return true;
4186
4187 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4188 case tok::less:
4189 return getLangOpts().ObjC1;
4190
4191 case tok::kw___cdecl:
4192 case tok::kw___stdcall:
4193 case tok::kw___fastcall:
4194 case tok::kw___thiscall:
4195 case tok::kw___vectorcall:
4196 case tok::kw___w64:
4197 case tok::kw___ptr64:
4198 case tok::kw___ptr32:
4199 case tok::kw___pascal:
4200 case tok::kw___unaligned:
4201
4202 case tok::kw___private:
4203 case tok::kw___local:
4204 case tok::kw___global:
4205 case tok::kw___constant:
4206 case tok::kw___generic:
4207 case tok::kw___read_only:
4208 case tok::kw___read_write:
4209 case tok::kw___write_only:
4210
4211 return true;
4212
4213 // C11 _Atomic
4214 case tok::kw__Atomic:
4215 return true;
4216 }
4217 }
4218
4219 /// isDeclarationSpecifier() - Return true if the current token is part of a
4220 /// declaration specifier.
4221 ///
4222 /// \param DisambiguatingWithExpression True to indicate that the purpose of
4223 /// this check is to disambiguate between an expression and a declaration.
isDeclarationSpecifier(bool DisambiguatingWithExpression)4224 bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
4225 switch (Tok.getKind()) {
4226 default: return false;
4227
4228 case tok::identifier: // foo::bar
4229 // Unfortunate hack to support "Class.factoryMethod" notation.
4230 if (getLangOpts().ObjC1 && NextToken().is(tok::period))
4231 return false;
4232 if (TryAltiVecVectorToken())
4233 return true;
4234 // Fall through.
4235 case tok::kw_decltype: // decltype(T())::type
4236 case tok::kw_typename: // typename T::type
4237 // Annotate typenames and C++ scope specifiers. If we get one, just
4238 // recurse to handle whatever we get.
4239 if (TryAnnotateTypeOrScopeToken())
4240 return true;
4241 if (Tok.is(tok::identifier))
4242 return false;
4243
4244 // If we're in Objective-C and we have an Objective-C class type followed
4245 // by an identifier and then either ':' or ']', in a place where an
4246 // expression is permitted, then this is probably a class message send
4247 // missing the initial '['. In this case, we won't consider this to be
4248 // the start of a declaration.
4249 if (DisambiguatingWithExpression &&
4250 isStartOfObjCClassMessageMissingOpenBracket())
4251 return false;
4252
4253 return isDeclarationSpecifier();
4254
4255 case tok::coloncolon: // ::foo::bar
4256 if (NextToken().is(tok::kw_new) || // ::new
4257 NextToken().is(tok::kw_delete)) // ::delete
4258 return false;
4259
4260 // Annotate typenames and C++ scope specifiers. If we get one, just
4261 // recurse to handle whatever we get.
4262 if (TryAnnotateTypeOrScopeToken())
4263 return true;
4264 return isDeclarationSpecifier();
4265
4266 // storage-class-specifier
4267 case tok::kw_typedef:
4268 case tok::kw_extern:
4269 case tok::kw___private_extern__:
4270 case tok::kw_static:
4271 case tok::kw_auto:
4272 case tok::kw_register:
4273 case tok::kw___thread:
4274 case tok::kw_thread_local:
4275 case tok::kw__Thread_local:
4276
4277 // Modules
4278 case tok::kw___module_private__:
4279
4280 // Debugger support
4281 case tok::kw___unknown_anytype:
4282
4283 // type-specifiers
4284 case tok::kw_short:
4285 case tok::kw_long:
4286 case tok::kw___int64:
4287 case tok::kw___int128:
4288 case tok::kw_signed:
4289 case tok::kw_unsigned:
4290 case tok::kw__Complex:
4291 case tok::kw__Imaginary:
4292 case tok::kw_void:
4293 case tok::kw_char:
4294 case tok::kw_wchar_t:
4295 case tok::kw_char16_t:
4296 case tok::kw_char32_t:
4297
4298 case tok::kw_int:
4299 case tok::kw_half:
4300 case tok::kw_float:
4301 case tok::kw_double:
4302 case tok::kw_bool:
4303 case tok::kw__Bool:
4304 case tok::kw__Decimal32:
4305 case tok::kw__Decimal64:
4306 case tok::kw__Decimal128:
4307 case tok::kw___vector:
4308
4309 // struct-or-union-specifier (C99) or class-specifier (C++)
4310 case tok::kw_class:
4311 case tok::kw_struct:
4312 case tok::kw_union:
4313 case tok::kw___interface:
4314 // enum-specifier
4315 case tok::kw_enum:
4316
4317 // type-qualifier
4318 case tok::kw_const:
4319 case tok::kw_volatile:
4320 case tok::kw_restrict:
4321
4322 // function-specifier
4323 case tok::kw_inline:
4324 case tok::kw_virtual:
4325 case tok::kw_explicit:
4326 case tok::kw__Noreturn:
4327
4328 // alignment-specifier
4329 case tok::kw__Alignas:
4330
4331 // friend keyword.
4332 case tok::kw_friend:
4333
4334 // static_assert-declaration
4335 case tok::kw__Static_assert:
4336
4337 // GNU typeof support.
4338 case tok::kw_typeof:
4339
4340 // GNU attributes.
4341 case tok::kw___attribute:
4342
4343 // C++11 decltype and constexpr.
4344 case tok::annot_decltype:
4345 case tok::kw_constexpr:
4346
4347 // C11 _Atomic
4348 case tok::kw__Atomic:
4349 return true;
4350
4351 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
4352 case tok::less:
4353 return getLangOpts().ObjC1;
4354
4355 // typedef-name
4356 case tok::annot_typename:
4357 return !DisambiguatingWithExpression ||
4358 !isStartOfObjCClassMessageMissingOpenBracket();
4359
4360 case tok::kw___declspec:
4361 case tok::kw___cdecl:
4362 case tok::kw___stdcall:
4363 case tok::kw___fastcall:
4364 case tok::kw___thiscall:
4365 case tok::kw___vectorcall:
4366 case tok::kw___w64:
4367 case tok::kw___sptr:
4368 case tok::kw___uptr:
4369 case tok::kw___ptr64:
4370 case tok::kw___ptr32:
4371 case tok::kw___forceinline:
4372 case tok::kw___pascal:
4373 case tok::kw___unaligned:
4374
4375 case tok::kw___private:
4376 case tok::kw___local:
4377 case tok::kw___global:
4378 case tok::kw___constant:
4379 case tok::kw___generic:
4380 case tok::kw___read_only:
4381 case tok::kw___read_write:
4382 case tok::kw___write_only:
4383
4384 return true;
4385 }
4386 }
4387
isConstructorDeclarator(bool IsUnqualified)4388 bool Parser::isConstructorDeclarator(bool IsUnqualified) {
4389 TentativeParsingAction TPA(*this);
4390
4391 // Parse the C++ scope specifier.
4392 CXXScopeSpec SS;
4393 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
4394 /*EnteringContext=*/true)) {
4395 TPA.Revert();
4396 return false;
4397 }
4398
4399 // Parse the constructor name.
4400 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) {
4401 // We already know that we have a constructor name; just consume
4402 // the token.
4403 ConsumeToken();
4404 } else {
4405 TPA.Revert();
4406 return false;
4407 }
4408
4409 // Current class name must be followed by a left parenthesis.
4410 if (Tok.isNot(tok::l_paren)) {
4411 TPA.Revert();
4412 return false;
4413 }
4414 ConsumeParen();
4415
4416 // A right parenthesis, or ellipsis followed by a right parenthesis signals
4417 // that we have a constructor.
4418 if (Tok.is(tok::r_paren) ||
4419 (Tok.is(tok::ellipsis) && NextToken().is(tok::r_paren))) {
4420 TPA.Revert();
4421 return true;
4422 }
4423
4424 // A C++11 attribute here signals that we have a constructor, and is an
4425 // attribute on the first constructor parameter.
4426 if (getLangOpts().CPlusPlus11 &&
4427 isCXX11AttributeSpecifier(/*Disambiguate*/ false,
4428 /*OuterMightBeMessageSend*/ true)) {
4429 TPA.Revert();
4430 return true;
4431 }
4432
4433 // If we need to, enter the specified scope.
4434 DeclaratorScopeObj DeclScopeObj(*this, SS);
4435 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
4436 DeclScopeObj.EnterDeclaratorScope();
4437
4438 // Optionally skip Microsoft attributes.
4439 ParsedAttributes Attrs(AttrFactory);
4440 MaybeParseMicrosoftAttributes(Attrs);
4441
4442 // Check whether the next token(s) are part of a declaration
4443 // specifier, in which case we have the start of a parameter and,
4444 // therefore, we know that this is a constructor.
4445 bool IsConstructor = false;
4446 if (isDeclarationSpecifier())
4447 IsConstructor = true;
4448 else if (Tok.is(tok::identifier) ||
4449 (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::identifier))) {
4450 // We've seen "C ( X" or "C ( X::Y", but "X" / "X::Y" is not a type.
4451 // This might be a parenthesized member name, but is more likely to
4452 // be a constructor declaration with an invalid argument type. Keep
4453 // looking.
4454 if (Tok.is(tok::annot_cxxscope))
4455 ConsumeToken();
4456 ConsumeToken();
4457
4458 // If this is not a constructor, we must be parsing a declarator,
4459 // which must have one of the following syntactic forms (see the
4460 // grammar extract at the start of ParseDirectDeclarator):
4461 switch (Tok.getKind()) {
4462 case tok::l_paren:
4463 // C(X ( int));
4464 case tok::l_square:
4465 // C(X [ 5]);
4466 // C(X [ [attribute]]);
4467 case tok::coloncolon:
4468 // C(X :: Y);
4469 // C(X :: *p);
4470 // Assume this isn't a constructor, rather than assuming it's a
4471 // constructor with an unnamed parameter of an ill-formed type.
4472 break;
4473
4474 case tok::r_paren:
4475 // C(X )
4476 if (NextToken().is(tok::colon) || NextToken().is(tok::kw_try)) {
4477 // Assume these were meant to be constructors:
4478 // C(X) : (the name of a bit-field cannot be parenthesized).
4479 // C(X) try (this is otherwise ill-formed).
4480 IsConstructor = true;
4481 }
4482 if (NextToken().is(tok::semi) || NextToken().is(tok::l_brace)) {
4483 // If we have a constructor name within the class definition,
4484 // assume these were meant to be constructors:
4485 // C(X) {
4486 // C(X) ;
4487 // ... because otherwise we would be declaring a non-static data
4488 // member that is ill-formed because it's of the same type as its
4489 // surrounding class.
4490 //
4491 // FIXME: We can actually do this whether or not the name is qualified,
4492 // because if it is qualified in this context it must be being used as
4493 // a constructor name. However, we do not implement that rule correctly
4494 // currently, so we're somewhat conservative here.
4495 IsConstructor = IsUnqualified;
4496 }
4497 break;
4498
4499 default:
4500 IsConstructor = true;
4501 break;
4502 }
4503 }
4504
4505 TPA.Revert();
4506 return IsConstructor;
4507 }
4508
4509 /// ParseTypeQualifierListOpt
4510 /// type-qualifier-list: [C99 6.7.5]
4511 /// type-qualifier
4512 /// [vendor] attributes
4513 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4514 /// type-qualifier-list type-qualifier
4515 /// [vendor] type-qualifier-list attributes
4516 /// [ only if AttrReqs & AR_VendorAttributesParsed ]
4517 /// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
4518 /// [ only if AttReqs & AR_CXX11AttributesParsed ]
4519 /// Note: vendor can be GNU, MS, etc and can be explicitly controlled via
4520 /// AttrRequirements bitmask values.
ParseTypeQualifierListOpt(DeclSpec & DS,unsigned AttrReqs,bool AtomicAllowed,bool IdentifierRequired)4521 void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, unsigned AttrReqs,
4522 bool AtomicAllowed,
4523 bool IdentifierRequired) {
4524 if (getLangOpts().CPlusPlus11 && (AttrReqs & AR_CXX11AttributesParsed) &&
4525 isCXX11AttributeSpecifier()) {
4526 ParsedAttributesWithRange attrs(AttrFactory);
4527 ParseCXX11Attributes(attrs);
4528 DS.takeAttributesFrom(attrs);
4529 }
4530
4531 SourceLocation EndLoc;
4532
4533 while (1) {
4534 bool isInvalid = false;
4535 const char *PrevSpec = nullptr;
4536 unsigned DiagID = 0;
4537 SourceLocation Loc = Tok.getLocation();
4538
4539 switch (Tok.getKind()) {
4540 case tok::code_completion:
4541 Actions.CodeCompleteTypeQualifiers(DS);
4542 return cutOffParsing();
4543
4544 case tok::kw_const:
4545 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
4546 getLangOpts());
4547 break;
4548 case tok::kw_volatile:
4549 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
4550 getLangOpts());
4551 break;
4552 case tok::kw_restrict:
4553 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
4554 getLangOpts());
4555 break;
4556 case tok::kw__Atomic:
4557 if (!AtomicAllowed)
4558 goto DoneWithTypeQuals;
4559 isInvalid = DS.SetTypeQual(DeclSpec::TQ_atomic, Loc, PrevSpec, DiagID,
4560 getLangOpts());
4561 break;
4562
4563 // OpenCL qualifiers:
4564 case tok::kw___private:
4565 case tok::kw___global:
4566 case tok::kw___local:
4567 case tok::kw___constant:
4568 case tok::kw___generic:
4569 case tok::kw___read_only:
4570 case tok::kw___write_only:
4571 case tok::kw___read_write:
4572 ParseOpenCLQualifiers(DS.getAttributes());
4573 break;
4574
4575 case tok::kw___uptr:
4576 // GNU libc headers in C mode use '__uptr' as an identifer which conflicts
4577 // with the MS modifier keyword.
4578 if ((AttrReqs & AR_DeclspecAttributesParsed) && !getLangOpts().CPlusPlus &&
4579 IdentifierRequired && DS.isEmpty() && NextToken().is(tok::semi)) {
4580 if (TryKeywordIdentFallback(false))
4581 continue;
4582 }
4583 case tok::kw___sptr:
4584 case tok::kw___w64:
4585 case tok::kw___ptr64:
4586 case tok::kw___ptr32:
4587 case tok::kw___cdecl:
4588 case tok::kw___stdcall:
4589 case tok::kw___fastcall:
4590 case tok::kw___thiscall:
4591 case tok::kw___vectorcall:
4592 case tok::kw___unaligned:
4593 if (AttrReqs & AR_DeclspecAttributesParsed) {
4594 ParseMicrosoftTypeAttributes(DS.getAttributes());
4595 continue;
4596 }
4597 goto DoneWithTypeQuals;
4598 case tok::kw___pascal:
4599 if (AttrReqs & AR_VendorAttributesParsed) {
4600 ParseBorlandTypeAttributes(DS.getAttributes());
4601 continue;
4602 }
4603 goto DoneWithTypeQuals;
4604 case tok::kw___attribute:
4605 if (AttrReqs & AR_GNUAttributesParsedAndRejected)
4606 // When GNU attributes are expressly forbidden, diagnose their usage.
4607 Diag(Tok, diag::err_attributes_not_allowed);
4608
4609 // Parse the attributes even if they are rejected to ensure that error
4610 // recovery is graceful.
4611 if (AttrReqs & AR_GNUAttributesParsed ||
4612 AttrReqs & AR_GNUAttributesParsedAndRejected) {
4613 ParseGNUAttributes(DS.getAttributes());
4614 continue; // do *not* consume the next token!
4615 }
4616 // otherwise, FALL THROUGH!
4617 default:
4618 DoneWithTypeQuals:
4619 // If this is not a type-qualifier token, we're done reading type
4620 // qualifiers. First verify that DeclSpec's are consistent.
4621 DS.Finish(Diags, PP, Actions.getASTContext().getPrintingPolicy());
4622 if (EndLoc.isValid())
4623 DS.SetRangeEnd(EndLoc);
4624 return;
4625 }
4626
4627 // If the specifier combination wasn't legal, issue a diagnostic.
4628 if (isInvalid) {
4629 assert(PrevSpec && "Method did not return previous specifier!");
4630 Diag(Tok, DiagID) << PrevSpec;
4631 }
4632 EndLoc = ConsumeToken();
4633 }
4634 }
4635
4636
4637 /// ParseDeclarator - Parse and verify a newly-initialized declarator.
4638 ///
ParseDeclarator(Declarator & D)4639 void Parser::ParseDeclarator(Declarator &D) {
4640 /// This implements the 'declarator' production in the C grammar, then checks
4641 /// for well-formedness and issues diagnostics.
4642 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
4643 }
4644
isPtrOperatorToken(tok::TokenKind Kind,const LangOptions & Lang,unsigned TheContext)4645 static bool isPtrOperatorToken(tok::TokenKind Kind, const LangOptions &Lang,
4646 unsigned TheContext) {
4647 if (Kind == tok::star || Kind == tok::caret)
4648 return true;
4649
4650 if (!Lang.CPlusPlus)
4651 return false;
4652
4653 if (Kind == tok::amp)
4654 return true;
4655
4656 // We parse rvalue refs in C++03, because otherwise the errors are scary.
4657 // But we must not parse them in conversion-type-ids and new-type-ids, since
4658 // those can be legitimately followed by a && operator.
4659 // (The same thing can in theory happen after a trailing-return-type, but
4660 // since those are a C++11 feature, there is no rejects-valid issue there.)
4661 if (Kind == tok::ampamp)
4662 return Lang.CPlusPlus11 || (TheContext != Declarator::ConversionIdContext &&
4663 TheContext != Declarator::CXXNewContext);
4664
4665 return false;
4666 }
4667
4668 /// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
4669 /// is parsed by the function passed to it. Pass null, and the direct-declarator
4670 /// isn't parsed at all, making this function effectively parse the C++
4671 /// ptr-operator production.
4672 ///
4673 /// If the grammar of this construct is extended, matching changes must also be
4674 /// made to TryParseDeclarator and MightBeDeclarator, and possibly to
4675 /// isConstructorDeclarator.
4676 ///
4677 /// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
4678 /// [C] pointer[opt] direct-declarator
4679 /// [C++] direct-declarator
4680 /// [C++] ptr-operator declarator
4681 ///
4682 /// pointer: [C99 6.7.5]
4683 /// '*' type-qualifier-list[opt]
4684 /// '*' type-qualifier-list[opt] pointer
4685 ///
4686 /// ptr-operator:
4687 /// '*' cv-qualifier-seq[opt]
4688 /// '&'
4689 /// [C++0x] '&&'
4690 /// [GNU] '&' restrict[opt] attributes[opt]
4691 /// [GNU?] '&&' restrict[opt] attributes[opt]
4692 /// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
ParseDeclaratorInternal(Declarator & D,DirectDeclParseFunction DirectDeclParser)4693 void Parser::ParseDeclaratorInternal(Declarator &D,
4694 DirectDeclParseFunction DirectDeclParser) {
4695 if (Diags.hasAllExtensionsSilenced())
4696 D.setExtension();
4697
4698 // C++ member pointers start with a '::' or a nested-name.
4699 // Member pointers get special handling, since there's no place for the
4700 // scope spec in the generic path below.
4701 if (getLangOpts().CPlusPlus &&
4702 (Tok.is(tok::coloncolon) ||
4703 (Tok.is(tok::identifier) &&
4704 (NextToken().is(tok::coloncolon) || NextToken().is(tok::less))) ||
4705 Tok.is(tok::annot_cxxscope))) {
4706 bool EnteringContext = D.getContext() == Declarator::FileContext ||
4707 D.getContext() == Declarator::MemberContext;
4708 CXXScopeSpec SS;
4709 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext);
4710
4711 if (SS.isNotEmpty()) {
4712 if (Tok.isNot(tok::star)) {
4713 // The scope spec really belongs to the direct-declarator.
4714 if (D.mayHaveIdentifier())
4715 D.getCXXScopeSpec() = SS;
4716 else
4717 AnnotateScopeToken(SS, true);
4718
4719 if (DirectDeclParser)
4720 (this->*DirectDeclParser)(D);
4721 return;
4722 }
4723
4724 SourceLocation Loc = ConsumeToken();
4725 D.SetRangeEnd(Loc);
4726 DeclSpec DS(AttrFactory);
4727 ParseTypeQualifierListOpt(DS);
4728 D.ExtendWithDeclSpec(DS);
4729
4730 // Recurse to parse whatever is left.
4731 ParseDeclaratorInternal(D, DirectDeclParser);
4732
4733 // Sema will have to catch (syntactically invalid) pointers into global
4734 // scope. It has to catch pointers into namespace scope anyway.
4735 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
4736 DS.getLocEnd()),
4737 DS.getAttributes(),
4738 /* Don't replace range end. */SourceLocation());
4739 return;
4740 }
4741 }
4742
4743 tok::TokenKind Kind = Tok.getKind();
4744 // Not a pointer, C++ reference, or block.
4745 if (!isPtrOperatorToken(Kind, getLangOpts(), D.getContext())) {
4746 if (DirectDeclParser)
4747 (this->*DirectDeclParser)(D);
4748 return;
4749 }
4750
4751 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
4752 // '&&' -> rvalue reference
4753 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
4754 D.SetRangeEnd(Loc);
4755
4756 if (Kind == tok::star || Kind == tok::caret) {
4757 // Is a pointer.
4758 DeclSpec DS(AttrFactory);
4759
4760 // GNU attributes are not allowed here in a new-type-id, but Declspec and
4761 // C++11 attributes are allowed.
4762 unsigned Reqs = AR_CXX11AttributesParsed | AR_DeclspecAttributesParsed |
4763 ((D.getContext() != Declarator::CXXNewContext)
4764 ? AR_GNUAttributesParsed
4765 : AR_GNUAttributesParsedAndRejected);
4766 ParseTypeQualifierListOpt(DS, Reqs, true, !D.mayOmitIdentifier());
4767 D.ExtendWithDeclSpec(DS);
4768
4769 // Recursively parse the declarator.
4770 ParseDeclaratorInternal(D, DirectDeclParser);
4771 if (Kind == tok::star)
4772 // Remember that we parsed a pointer type, and remember the type-quals.
4773 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
4774 DS.getConstSpecLoc(),
4775 DS.getVolatileSpecLoc(),
4776 DS.getRestrictSpecLoc()),
4777 DS.getAttributes(),
4778 SourceLocation());
4779 else
4780 // Remember that we parsed a Block type, and remember the type-quals.
4781 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
4782 Loc),
4783 DS.getAttributes(),
4784 SourceLocation());
4785 } else {
4786 // Is a reference
4787 DeclSpec DS(AttrFactory);
4788
4789 // Complain about rvalue references in C++03, but then go on and build
4790 // the declarator.
4791 if (Kind == tok::ampamp)
4792 Diag(Loc, getLangOpts().CPlusPlus11 ?
4793 diag::warn_cxx98_compat_rvalue_reference :
4794 diag::ext_rvalue_reference);
4795
4796 // GNU-style and C++11 attributes are allowed here, as is restrict.
4797 ParseTypeQualifierListOpt(DS);
4798 D.ExtendWithDeclSpec(DS);
4799
4800 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
4801 // cv-qualifiers are introduced through the use of a typedef or of a
4802 // template type argument, in which case the cv-qualifiers are ignored.
4803 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
4804 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
4805 Diag(DS.getConstSpecLoc(),
4806 diag::err_invalid_reference_qualifier_application) << "const";
4807 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
4808 Diag(DS.getVolatileSpecLoc(),
4809 diag::err_invalid_reference_qualifier_application) << "volatile";
4810 // 'restrict' is permitted as an extension.
4811 if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic)
4812 Diag(DS.getAtomicSpecLoc(),
4813 diag::err_invalid_reference_qualifier_application) << "_Atomic";
4814 }
4815
4816 // Recursively parse the declarator.
4817 ParseDeclaratorInternal(D, DirectDeclParser);
4818
4819 if (D.getNumTypeObjects() > 0) {
4820 // C++ [dcl.ref]p4: There shall be no references to references.
4821 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
4822 if (InnerChunk.Kind == DeclaratorChunk::Reference) {
4823 if (const IdentifierInfo *II = D.getIdentifier())
4824 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
4825 << II;
4826 else
4827 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
4828 << "type name";
4829
4830 // Once we've complained about the reference-to-reference, we
4831 // can go ahead and build the (technically ill-formed)
4832 // declarator: reference collapsing will take care of it.
4833 }
4834 }
4835
4836 // Remember that we parsed a reference type.
4837 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
4838 Kind == tok::amp),
4839 DS.getAttributes(),
4840 SourceLocation());
4841 }
4842 }
4843
4844 // When correcting from misplaced brackets before the identifier, the location
4845 // is saved inside the declarator so that other diagnostic messages can use
4846 // them. This extracts and returns that location, or returns the provided
4847 // location if a stored location does not exist.
getMissingDeclaratorIdLoc(Declarator & D,SourceLocation Loc)4848 static SourceLocation getMissingDeclaratorIdLoc(Declarator &D,
4849 SourceLocation Loc) {
4850 if (D.getName().StartLocation.isInvalid() &&
4851 D.getName().EndLocation.isValid())
4852 return D.getName().EndLocation;
4853
4854 return Loc;
4855 }
4856
4857 /// ParseDirectDeclarator
4858 /// direct-declarator: [C99 6.7.5]
4859 /// [C99] identifier
4860 /// '(' declarator ')'
4861 /// [GNU] '(' attributes declarator ')'
4862 /// [C90] direct-declarator '[' constant-expression[opt] ']'
4863 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
4864 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
4865 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
4866 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
4867 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
4868 /// attribute-specifier-seq[opt]
4869 /// direct-declarator '(' parameter-type-list ')'
4870 /// direct-declarator '(' identifier-list[opt] ')'
4871 /// [GNU] direct-declarator '(' parameter-forward-declarations
4872 /// parameter-type-list[opt] ')'
4873 /// [C++] direct-declarator '(' parameter-declaration-clause ')'
4874 /// cv-qualifier-seq[opt] exception-specification[opt]
4875 /// [C++11] direct-declarator '(' parameter-declaration-clause ')'
4876 /// attribute-specifier-seq[opt] cv-qualifier-seq[opt]
4877 /// ref-qualifier[opt] exception-specification[opt]
4878 /// [C++] declarator-id
4879 /// [C++11] declarator-id attribute-specifier-seq[opt]
4880 ///
4881 /// declarator-id: [C++ 8]
4882 /// '...'[opt] id-expression
4883 /// '::'[opt] nested-name-specifier[opt] type-name
4884 ///
4885 /// id-expression: [C++ 5.1]
4886 /// unqualified-id
4887 /// qualified-id
4888 ///
4889 /// unqualified-id: [C++ 5.1]
4890 /// identifier
4891 /// operator-function-id
4892 /// conversion-function-id
4893 /// '~' class-name
4894 /// template-id
4895 ///
4896 /// Note, any additional constructs added here may need corresponding changes
4897 /// in isConstructorDeclarator.
ParseDirectDeclarator(Declarator & D)4898 void Parser::ParseDirectDeclarator(Declarator &D) {
4899 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
4900
4901 if (getLangOpts().CPlusPlus && D.mayHaveIdentifier()) {
4902 // Don't parse FOO:BAR as if it were a typo for FOO::BAR inside a class, in
4903 // this context it is a bitfield. Also in range-based for statement colon
4904 // may delimit for-range-declaration.
4905 ColonProtectionRAIIObject X(*this,
4906 D.getContext() == Declarator::MemberContext ||
4907 (D.getContext() == Declarator::ForContext &&
4908 getLangOpts().CPlusPlus11));
4909
4910 // ParseDeclaratorInternal might already have parsed the scope.
4911 if (D.getCXXScopeSpec().isEmpty()) {
4912 bool EnteringContext = D.getContext() == Declarator::FileContext ||
4913 D.getContext() == Declarator::MemberContext;
4914 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(),
4915 EnteringContext);
4916 }
4917
4918 if (D.getCXXScopeSpec().isValid()) {
4919 if (Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
4920 // Change the declaration context for name lookup, until this function
4921 // is exited (and the declarator has been parsed).
4922 DeclScopeObj.EnterDeclaratorScope();
4923 }
4924
4925 // C++0x [dcl.fct]p14:
4926 // There is a syntactic ambiguity when an ellipsis occurs at the end of a
4927 // parameter-declaration-clause without a preceding comma. In this case,
4928 // the ellipsis is parsed as part of the abstract-declarator if the type
4929 // of the parameter either names a template parameter pack that has not
4930 // been expanded or contains auto; otherwise, it is parsed as part of the
4931 // parameter-declaration-clause.
4932 if (Tok.is(tok::ellipsis) && D.getCXXScopeSpec().isEmpty() &&
4933 !((D.getContext() == Declarator::PrototypeContext ||
4934 D.getContext() == Declarator::LambdaExprParameterContext ||
4935 D.getContext() == Declarator::BlockLiteralContext) &&
4936 NextToken().is(tok::r_paren) &&
4937 !D.hasGroupingParens() &&
4938 !Actions.containsUnexpandedParameterPacks(D) &&
4939 D.getDeclSpec().getTypeSpecType() != TST_auto)) {
4940 SourceLocation EllipsisLoc = ConsumeToken();
4941 if (isPtrOperatorToken(Tok.getKind(), getLangOpts(), D.getContext())) {
4942 // The ellipsis was put in the wrong place. Recover, and explain to
4943 // the user what they should have done.
4944 ParseDeclarator(D);
4945 if (EllipsisLoc.isValid())
4946 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
4947 return;
4948 } else
4949 D.setEllipsisLoc(EllipsisLoc);
4950
4951 // The ellipsis can't be followed by a parenthesized declarator. We
4952 // check for that in ParseParenDeclarator, after we have disambiguated
4953 // the l_paren token.
4954 }
4955
4956 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) ||
4957 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) {
4958 // We found something that indicates the start of an unqualified-id.
4959 // Parse that unqualified-id.
4960 bool AllowConstructorName;
4961 if (D.getDeclSpec().hasTypeSpecifier())
4962 AllowConstructorName = false;
4963 else if (D.getCXXScopeSpec().isSet())
4964 AllowConstructorName =
4965 (D.getContext() == Declarator::FileContext ||
4966 D.getContext() == Declarator::MemberContext);
4967 else
4968 AllowConstructorName = (D.getContext() == Declarator::MemberContext);
4969
4970 SourceLocation TemplateKWLoc;
4971 if (ParseUnqualifiedId(D.getCXXScopeSpec(),
4972 /*EnteringContext=*/true,
4973 /*AllowDestructorName=*/true,
4974 AllowConstructorName,
4975 ParsedType(),
4976 TemplateKWLoc,
4977 D.getName()) ||
4978 // Once we're past the identifier, if the scope was bad, mark the
4979 // whole declarator bad.
4980 D.getCXXScopeSpec().isInvalid()) {
4981 D.SetIdentifier(nullptr, Tok.getLocation());
4982 D.setInvalidType(true);
4983 } else {
4984 // Parsed the unqualified-id; update range information and move along.
4985 if (D.getSourceRange().getBegin().isInvalid())
4986 D.SetRangeBegin(D.getName().getSourceRange().getBegin());
4987 D.SetRangeEnd(D.getName().getSourceRange().getEnd());
4988 }
4989 goto PastIdentifier;
4990 }
4991 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
4992 assert(!getLangOpts().CPlusPlus &&
4993 "There's a C++-specific check for tok::identifier above");
4994 assert(Tok.getIdentifierInfo() && "Not an identifier?");
4995 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
4996 D.SetRangeEnd(Tok.getLocation());
4997 ConsumeToken();
4998 goto PastIdentifier;
4999 } else if (Tok.is(tok::identifier) && D.diagnoseIdentifier()) {
5000 // A virt-specifier isn't treated as an identifier if it appears after a
5001 // trailing-return-type.
5002 if (D.getContext() != Declarator::TrailingReturnContext ||
5003 !isCXX11VirtSpecifier(Tok)) {
5004 Diag(Tok.getLocation(), diag::err_unexpected_unqualified_id)
5005 << FixItHint::CreateRemoval(Tok.getLocation());
5006 D.SetIdentifier(nullptr, Tok.getLocation());
5007 ConsumeToken();
5008 goto PastIdentifier;
5009 }
5010 }
5011
5012 if (Tok.is(tok::l_paren)) {
5013 // direct-declarator: '(' declarator ')'
5014 // direct-declarator: '(' attributes declarator ')'
5015 // Example: 'char (*X)' or 'int (*XX)(void)'
5016 ParseParenDeclarator(D);
5017
5018 // If the declarator was parenthesized, we entered the declarator
5019 // scope when parsing the parenthesized declarator, then exited
5020 // the scope already. Re-enter the scope, if we need to.
5021 if (D.getCXXScopeSpec().isSet()) {
5022 // If there was an error parsing parenthesized declarator, declarator
5023 // scope may have been entered before. Don't do it again.
5024 if (!D.isInvalidType() &&
5025 Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
5026 // Change the declaration context for name lookup, until this function
5027 // is exited (and the declarator has been parsed).
5028 DeclScopeObj.EnterDeclaratorScope();
5029 }
5030 } else if (D.mayOmitIdentifier()) {
5031 // This could be something simple like "int" (in which case the declarator
5032 // portion is empty), if an abstract-declarator is allowed.
5033 D.SetIdentifier(nullptr, Tok.getLocation());
5034
5035 // The grammar for abstract-pack-declarator does not allow grouping parens.
5036 // FIXME: Revisit this once core issue 1488 is resolved.
5037 if (D.hasEllipsis() && D.hasGroupingParens())
5038 Diag(PP.getLocForEndOfToken(D.getEllipsisLoc()),
5039 diag::ext_abstract_pack_declarator_parens);
5040 } else {
5041 if (Tok.getKind() == tok::annot_pragma_parser_crash)
5042 LLVM_BUILTIN_TRAP;
5043 if (Tok.is(tok::l_square))
5044 return ParseMisplacedBracketDeclarator(D);
5045 if (D.getContext() == Declarator::MemberContext) {
5046 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5047 diag::err_expected_member_name_or_semi)
5048 << (D.getDeclSpec().isEmpty() ? SourceRange()
5049 : D.getDeclSpec().getSourceRange());
5050 } else if (getLangOpts().CPlusPlus) {
5051 if (Tok.is(tok::period) || Tok.is(tok::arrow))
5052 Diag(Tok, diag::err_invalid_operator_on_type) << Tok.is(tok::arrow);
5053 else {
5054 SourceLocation Loc = D.getCXXScopeSpec().getEndLoc();
5055 if (Tok.isAtStartOfLine() && Loc.isValid())
5056 Diag(PP.getLocForEndOfToken(Loc), diag::err_expected_unqualified_id)
5057 << getLangOpts().CPlusPlus;
5058 else
5059 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5060 diag::err_expected_unqualified_id)
5061 << getLangOpts().CPlusPlus;
5062 }
5063 } else {
5064 Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
5065 diag::err_expected_either)
5066 << tok::identifier << tok::l_paren;
5067 }
5068 D.SetIdentifier(nullptr, Tok.getLocation());
5069 D.setInvalidType(true);
5070 }
5071
5072 PastIdentifier:
5073 assert(D.isPastIdentifier() &&
5074 "Haven't past the location of the identifier yet?");
5075
5076 // Don't parse attributes unless we have parsed an unparenthesized name.
5077 if (D.hasName() && !D.getNumTypeObjects())
5078 MaybeParseCXX11Attributes(D);
5079
5080 while (1) {
5081 if (Tok.is(tok::l_paren)) {
5082 // Enter function-declaration scope, limiting any declarators to the
5083 // function prototype scope, including parameter declarators.
5084 ParseScope PrototypeScope(this,
5085 Scope::FunctionPrototypeScope|Scope::DeclScope|
5086 (D.isFunctionDeclaratorAFunctionDeclaration()
5087 ? Scope::FunctionDeclarationScope : 0));
5088
5089 // The paren may be part of a C++ direct initializer, eg. "int x(1);".
5090 // In such a case, check if we actually have a function declarator; if it
5091 // is not, the declarator has been fully parsed.
5092 bool IsAmbiguous = false;
5093 if (getLangOpts().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
5094 // The name of the declarator, if any, is tentatively declared within
5095 // a possible direct initializer.
5096 TentativelyDeclaredIdentifiers.push_back(D.getIdentifier());
5097 bool IsFunctionDecl = isCXXFunctionDeclarator(&IsAmbiguous);
5098 TentativelyDeclaredIdentifiers.pop_back();
5099 if (!IsFunctionDecl)
5100 break;
5101 }
5102 ParsedAttributes attrs(AttrFactory);
5103 BalancedDelimiterTracker T(*this, tok::l_paren);
5104 T.consumeOpen();
5105 ParseFunctionDeclarator(D, attrs, T, IsAmbiguous);
5106 PrototypeScope.Exit();
5107 } else if (Tok.is(tok::l_square)) {
5108 ParseBracketDeclarator(D);
5109 } else {
5110 break;
5111 }
5112 }
5113 }
5114
5115 /// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
5116 /// only called before the identifier, so these are most likely just grouping
5117 /// parens for precedence. If we find that these are actually function
5118 /// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
5119 ///
5120 /// direct-declarator:
5121 /// '(' declarator ')'
5122 /// [GNU] '(' attributes declarator ')'
5123 /// direct-declarator '(' parameter-type-list ')'
5124 /// direct-declarator '(' identifier-list[opt] ')'
5125 /// [GNU] direct-declarator '(' parameter-forward-declarations
5126 /// parameter-type-list[opt] ')'
5127 ///
ParseParenDeclarator(Declarator & D)5128 void Parser::ParseParenDeclarator(Declarator &D) {
5129 BalancedDelimiterTracker T(*this, tok::l_paren);
5130 T.consumeOpen();
5131
5132 assert(!D.isPastIdentifier() && "Should be called before passing identifier");
5133
5134 // Eat any attributes before we look at whether this is a grouping or function
5135 // declarator paren. If this is a grouping paren, the attribute applies to
5136 // the type being built up, for example:
5137 // int (__attribute__(()) *x)(long y)
5138 // If this ends up not being a grouping paren, the attribute applies to the
5139 // first argument, for example:
5140 // int (__attribute__(()) int x)
5141 // In either case, we need to eat any attributes to be able to determine what
5142 // sort of paren this is.
5143 //
5144 ParsedAttributes attrs(AttrFactory);
5145 bool RequiresArg = false;
5146 if (Tok.is(tok::kw___attribute)) {
5147 ParseGNUAttributes(attrs);
5148
5149 // We require that the argument list (if this is a non-grouping paren) be
5150 // present even if the attribute list was empty.
5151 RequiresArg = true;
5152 }
5153
5154 // Eat any Microsoft extensions.
5155 ParseMicrosoftTypeAttributes(attrs);
5156
5157 // Eat any Borland extensions.
5158 if (Tok.is(tok::kw___pascal))
5159 ParseBorlandTypeAttributes(attrs);
5160
5161 // If we haven't past the identifier yet (or where the identifier would be
5162 // stored, if this is an abstract declarator), then this is probably just
5163 // grouping parens. However, if this could be an abstract-declarator, then
5164 // this could also be the start of function arguments (consider 'void()').
5165 bool isGrouping;
5166
5167 if (!D.mayOmitIdentifier()) {
5168 // If this can't be an abstract-declarator, this *must* be a grouping
5169 // paren, because we haven't seen the identifier yet.
5170 isGrouping = true;
5171 } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
5172 (getLangOpts().CPlusPlus && Tok.is(tok::ellipsis) &&
5173 NextToken().is(tok::r_paren)) || // C++ int(...)
5174 isDeclarationSpecifier() || // 'int(int)' is a function.
5175 isCXX11AttributeSpecifier()) { // 'int([[]]int)' is a function.
5176 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
5177 // considered to be a type, not a K&R identifier-list.
5178 isGrouping = false;
5179 } else {
5180 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
5181 isGrouping = true;
5182 }
5183
5184 // If this is a grouping paren, handle:
5185 // direct-declarator: '(' declarator ')'
5186 // direct-declarator: '(' attributes declarator ')'
5187 if (isGrouping) {
5188 SourceLocation EllipsisLoc = D.getEllipsisLoc();
5189 D.setEllipsisLoc(SourceLocation());
5190
5191 bool hadGroupingParens = D.hasGroupingParens();
5192 D.setGroupingParens(true);
5193 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5194 // Match the ')'.
5195 T.consumeClose();
5196 D.AddTypeInfo(DeclaratorChunk::getParen(T.getOpenLocation(),
5197 T.getCloseLocation()),
5198 attrs, T.getCloseLocation());
5199
5200 D.setGroupingParens(hadGroupingParens);
5201
5202 // An ellipsis cannot be placed outside parentheses.
5203 if (EllipsisLoc.isValid())
5204 DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, D);
5205
5206 return;
5207 }
5208
5209 // Okay, if this wasn't a grouping paren, it must be the start of a function
5210 // argument list. Recognize that this declarator will never have an
5211 // identifier (and remember where it would have been), then call into
5212 // ParseFunctionDeclarator to handle of argument list.
5213 D.SetIdentifier(nullptr, Tok.getLocation());
5214
5215 // Enter function-declaration scope, limiting any declarators to the
5216 // function prototype scope, including parameter declarators.
5217 ParseScope PrototypeScope(this,
5218 Scope::FunctionPrototypeScope | Scope::DeclScope |
5219 (D.isFunctionDeclaratorAFunctionDeclaration()
5220 ? Scope::FunctionDeclarationScope : 0));
5221 ParseFunctionDeclarator(D, attrs, T, false, RequiresArg);
5222 PrototypeScope.Exit();
5223 }
5224
5225 /// ParseFunctionDeclarator - We are after the identifier and have parsed the
5226 /// declarator D up to a paren, which indicates that we are parsing function
5227 /// arguments.
5228 ///
5229 /// If FirstArgAttrs is non-null, then the caller parsed those arguments
5230 /// immediately after the open paren - they should be considered to be the
5231 /// first argument of a parameter.
5232 ///
5233 /// If RequiresArg is true, then the first argument of the function is required
5234 /// to be present and required to not be an identifier list.
5235 ///
5236 /// For C++, after the parameter-list, it also parses the cv-qualifier-seq[opt],
5237 /// (C++11) ref-qualifier[opt], exception-specification[opt],
5238 /// (C++11) attribute-specifier-seq[opt], and (C++11) trailing-return-type[opt].
5239 ///
5240 /// [C++11] exception-specification:
5241 /// dynamic-exception-specification
5242 /// noexcept-specification
5243 ///
ParseFunctionDeclarator(Declarator & D,ParsedAttributes & FirstArgAttrs,BalancedDelimiterTracker & Tracker,bool IsAmbiguous,bool RequiresArg)5244 void Parser::ParseFunctionDeclarator(Declarator &D,
5245 ParsedAttributes &FirstArgAttrs,
5246 BalancedDelimiterTracker &Tracker,
5247 bool IsAmbiguous,
5248 bool RequiresArg) {
5249 assert(getCurScope()->isFunctionPrototypeScope() &&
5250 "Should call from a Function scope");
5251 // lparen is already consumed!
5252 assert(D.isPastIdentifier() && "Should not call before identifier!");
5253
5254 // This should be true when the function has typed arguments.
5255 // Otherwise, it is treated as a K&R-style function.
5256 bool HasProto = false;
5257 // Build up an array of information about the parsed arguments.
5258 SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
5259 // Remember where we see an ellipsis, if any.
5260 SourceLocation EllipsisLoc;
5261
5262 DeclSpec DS(AttrFactory);
5263 bool RefQualifierIsLValueRef = true;
5264 SourceLocation RefQualifierLoc;
5265 SourceLocation ConstQualifierLoc;
5266 SourceLocation VolatileQualifierLoc;
5267 SourceLocation RestrictQualifierLoc;
5268 ExceptionSpecificationType ESpecType = EST_None;
5269 SourceRange ESpecRange;
5270 SmallVector<ParsedType, 2> DynamicExceptions;
5271 SmallVector<SourceRange, 2> DynamicExceptionRanges;
5272 ExprResult NoexceptExpr;
5273 CachedTokens *ExceptionSpecTokens = 0;
5274 ParsedAttributes FnAttrs(AttrFactory);
5275 TypeResult TrailingReturnType;
5276
5277 /* LocalEndLoc is the end location for the local FunctionTypeLoc.
5278 EndLoc is the end location for the function declarator.
5279 They differ for trailing return types. */
5280 SourceLocation StartLoc, LocalEndLoc, EndLoc;
5281 SourceLocation LParenLoc, RParenLoc;
5282 LParenLoc = Tracker.getOpenLocation();
5283 StartLoc = LParenLoc;
5284
5285 if (isFunctionDeclaratorIdentifierList()) {
5286 if (RequiresArg)
5287 Diag(Tok, diag::err_argument_required_after_attribute);
5288
5289 ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
5290
5291 Tracker.consumeClose();
5292 RParenLoc = Tracker.getCloseLocation();
5293 LocalEndLoc = RParenLoc;
5294 EndLoc = RParenLoc;
5295 } else {
5296 if (Tok.isNot(tok::r_paren))
5297 ParseParameterDeclarationClause(D, FirstArgAttrs, ParamInfo,
5298 EllipsisLoc);
5299 else if (RequiresArg)
5300 Diag(Tok, diag::err_argument_required_after_attribute);
5301
5302 HasProto = ParamInfo.size() || getLangOpts().CPlusPlus;
5303
5304 // If we have the closing ')', eat it.
5305 Tracker.consumeClose();
5306 RParenLoc = Tracker.getCloseLocation();
5307 LocalEndLoc = RParenLoc;
5308 EndLoc = RParenLoc;
5309
5310 if (getLangOpts().CPlusPlus) {
5311 // FIXME: Accept these components in any order, and produce fixits to
5312 // correct the order if the user gets it wrong. Ideally we should deal
5313 // with the virt-specifier-seq and pure-specifier in the same way.
5314
5315 // Parse cv-qualifier-seq[opt].
5316 ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed,
5317 /*AtomicAllowed*/ false);
5318 if (!DS.getSourceRange().getEnd().isInvalid()) {
5319 EndLoc = DS.getSourceRange().getEnd();
5320 ConstQualifierLoc = DS.getConstSpecLoc();
5321 VolatileQualifierLoc = DS.getVolatileSpecLoc();
5322 RestrictQualifierLoc = DS.getRestrictSpecLoc();
5323 }
5324
5325 // Parse ref-qualifier[opt].
5326 if (Tok.is(tok::amp) || Tok.is(tok::ampamp)) {
5327 Diag(Tok, getLangOpts().CPlusPlus11 ?
5328 diag::warn_cxx98_compat_ref_qualifier :
5329 diag::ext_ref_qualifier);
5330
5331 RefQualifierIsLValueRef = Tok.is(tok::amp);
5332 RefQualifierLoc = ConsumeToken();
5333 EndLoc = RefQualifierLoc;
5334 }
5335
5336 // C++11 [expr.prim.general]p3:
5337 // If a declaration declares a member function or member function
5338 // template of a class X, the expression this is a prvalue of type
5339 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
5340 // and the end of the function-definition, member-declarator, or
5341 // declarator.
5342 // FIXME: currently, "static" case isn't handled correctly.
5343 bool IsCXX11MemberFunction =
5344 getLangOpts().CPlusPlus11 &&
5345 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
5346 (D.getContext() == Declarator::MemberContext
5347 ? !D.getDeclSpec().isFriendSpecified()
5348 : D.getContext() == Declarator::FileContext &&
5349 D.getCXXScopeSpec().isValid() &&
5350 Actions.CurContext->isRecord());
5351 Sema::CXXThisScopeRAII ThisScope(Actions,
5352 dyn_cast<CXXRecordDecl>(Actions.CurContext),
5353 DS.getTypeQualifiers() |
5354 (D.getDeclSpec().isConstexprSpecified() &&
5355 !getLangOpts().CPlusPlus14
5356 ? Qualifiers::Const : 0),
5357 IsCXX11MemberFunction);
5358
5359 // Parse exception-specification[opt].
5360 bool Delayed = D.isFirstDeclarationOfMember() &&
5361 D.isFunctionDeclaratorAFunctionDeclaration();
5362 if (Delayed && Actions.isLibstdcxxEagerExceptionSpecHack(D) &&
5363 GetLookAheadToken(0).is(tok::kw_noexcept) &&
5364 GetLookAheadToken(1).is(tok::l_paren) &&
5365 GetLookAheadToken(2).is(tok::kw_noexcept) &&
5366 GetLookAheadToken(3).is(tok::l_paren) &&
5367 GetLookAheadToken(4).is(tok::identifier) &&
5368 GetLookAheadToken(4).getIdentifierInfo()->isStr("swap")) {
5369 // HACK: We've got an exception-specification
5370 // noexcept(noexcept(swap(...)))
5371 // or
5372 // noexcept(noexcept(swap(...)) && noexcept(swap(...)))
5373 // on a 'swap' member function. This is a libstdc++ bug; the lookup
5374 // for 'swap' will only find the function we're currently declaring,
5375 // whereas it expects to find a non-member swap through ADL. Turn off
5376 // delayed parsing to give it a chance to find what it expects.
5377 Delayed = false;
5378 }
5379 ESpecType = tryParseExceptionSpecification(Delayed,
5380 ESpecRange,
5381 DynamicExceptions,
5382 DynamicExceptionRanges,
5383 NoexceptExpr,
5384 ExceptionSpecTokens);
5385 if (ESpecType != EST_None)
5386 EndLoc = ESpecRange.getEnd();
5387
5388 // Parse attribute-specifier-seq[opt]. Per DR 979 and DR 1297, this goes
5389 // after the exception-specification.
5390 MaybeParseCXX11Attributes(FnAttrs);
5391
5392 // Parse trailing-return-type[opt].
5393 LocalEndLoc = EndLoc;
5394 if (getLangOpts().CPlusPlus11 && Tok.is(tok::arrow)) {
5395 Diag(Tok, diag::warn_cxx98_compat_trailing_return_type);
5396 if (D.getDeclSpec().getTypeSpecType() == TST_auto)
5397 StartLoc = D.getDeclSpec().getTypeSpecTypeLoc();
5398 LocalEndLoc = Tok.getLocation();
5399 SourceRange Range;
5400 TrailingReturnType = ParseTrailingReturnType(Range);
5401 EndLoc = Range.getEnd();
5402 }
5403 }
5404 }
5405
5406 // Remember that we parsed a function type, and remember the attributes.
5407 D.AddTypeInfo(DeclaratorChunk::getFunction(HasProto,
5408 IsAmbiguous,
5409 LParenLoc,
5410 ParamInfo.data(), ParamInfo.size(),
5411 EllipsisLoc, RParenLoc,
5412 DS.getTypeQualifiers(),
5413 RefQualifierIsLValueRef,
5414 RefQualifierLoc, ConstQualifierLoc,
5415 VolatileQualifierLoc,
5416 RestrictQualifierLoc,
5417 /*MutableLoc=*/SourceLocation(),
5418 ESpecType, ESpecRange.getBegin(),
5419 DynamicExceptions.data(),
5420 DynamicExceptionRanges.data(),
5421 DynamicExceptions.size(),
5422 NoexceptExpr.isUsable() ?
5423 NoexceptExpr.get() : nullptr,
5424 ExceptionSpecTokens,
5425 StartLoc, LocalEndLoc, D,
5426 TrailingReturnType),
5427 FnAttrs, EndLoc);
5428 }
5429
5430 /// isFunctionDeclaratorIdentifierList - This parameter list may have an
5431 /// identifier list form for a K&R-style function: void foo(a,b,c)
5432 ///
5433 /// Note that identifier-lists are only allowed for normal declarators, not for
5434 /// abstract-declarators.
isFunctionDeclaratorIdentifierList()5435 bool Parser::isFunctionDeclaratorIdentifierList() {
5436 return !getLangOpts().CPlusPlus
5437 && Tok.is(tok::identifier)
5438 && !TryAltiVecVectorToken()
5439 // K&R identifier lists can't have typedefs as identifiers, per C99
5440 // 6.7.5.3p11.
5441 && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
5442 // Identifier lists follow a really simple grammar: the identifiers can
5443 // be followed *only* by a ", identifier" or ")". However, K&R
5444 // identifier lists are really rare in the brave new modern world, and
5445 // it is very common for someone to typo a type in a non-K&R style
5446 // list. If we are presented with something like: "void foo(intptr x,
5447 // float y)", we don't want to start parsing the function declarator as
5448 // though it is a K&R style declarator just because intptr is an
5449 // invalid type.
5450 //
5451 // To handle this, we check to see if the token after the first
5452 // identifier is a "," or ")". Only then do we parse it as an
5453 // identifier list.
5454 && (NextToken().is(tok::comma) || NextToken().is(tok::r_paren));
5455 }
5456
5457 /// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
5458 /// we found a K&R-style identifier list instead of a typed parameter list.
5459 ///
5460 /// After returning, ParamInfo will hold the parsed parameters.
5461 ///
5462 /// identifier-list: [C99 6.7.5]
5463 /// identifier
5464 /// identifier-list ',' identifier
5465 ///
ParseFunctionDeclaratorIdentifierList(Declarator & D,SmallVectorImpl<DeclaratorChunk::ParamInfo> & ParamInfo)5466 void Parser::ParseFunctionDeclaratorIdentifierList(
5467 Declarator &D,
5468 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo) {
5469 // If there was no identifier specified for the declarator, either we are in
5470 // an abstract-declarator, or we are in a parameter declarator which was found
5471 // to be abstract. In abstract-declarators, identifier lists are not valid:
5472 // diagnose this.
5473 if (!D.getIdentifier())
5474 Diag(Tok, diag::ext_ident_list_in_param);
5475
5476 // Maintain an efficient lookup of params we have seen so far.
5477 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
5478
5479 do {
5480 // If this isn't an identifier, report the error and skip until ')'.
5481 if (Tok.isNot(tok::identifier)) {
5482 Diag(Tok, diag::err_expected) << tok::identifier;
5483 SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch);
5484 // Forget we parsed anything.
5485 ParamInfo.clear();
5486 return;
5487 }
5488
5489 IdentifierInfo *ParmII = Tok.getIdentifierInfo();
5490
5491 // Reject 'typedef int y; int test(x, y)', but continue parsing.
5492 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
5493 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
5494
5495 // Verify that the argument identifier has not already been mentioned.
5496 if (!ParamsSoFar.insert(ParmII).second) {
5497 Diag(Tok, diag::err_param_redefinition) << ParmII;
5498 } else {
5499 // Remember this identifier in ParamInfo.
5500 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
5501 Tok.getLocation(),
5502 nullptr));
5503 }
5504
5505 // Eat the identifier.
5506 ConsumeToken();
5507 // The list continues if we see a comma.
5508 } while (TryConsumeToken(tok::comma));
5509 }
5510
5511 /// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
5512 /// after the opening parenthesis. This function will not parse a K&R-style
5513 /// identifier list.
5514 ///
5515 /// D is the declarator being parsed. If FirstArgAttrs is non-null, then the
5516 /// caller parsed those arguments immediately after the open paren - they should
5517 /// be considered to be part of the first parameter.
5518 ///
5519 /// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
5520 /// be the location of the ellipsis, if any was parsed.
5521 ///
5522 /// parameter-type-list: [C99 6.7.5]
5523 /// parameter-list
5524 /// parameter-list ',' '...'
5525 /// [C++] parameter-list '...'
5526 ///
5527 /// parameter-list: [C99 6.7.5]
5528 /// parameter-declaration
5529 /// parameter-list ',' parameter-declaration
5530 ///
5531 /// parameter-declaration: [C99 6.7.5]
5532 /// declaration-specifiers declarator
5533 /// [C++] declaration-specifiers declarator '=' assignment-expression
5534 /// [C++11] initializer-clause
5535 /// [GNU] declaration-specifiers declarator attributes
5536 /// declaration-specifiers abstract-declarator[opt]
5537 /// [C++] declaration-specifiers abstract-declarator[opt]
5538 /// '=' assignment-expression
5539 /// [GNU] declaration-specifiers abstract-declarator[opt] attributes
5540 /// [C++11] attribute-specifier-seq parameter-declaration
5541 ///
ParseParameterDeclarationClause(Declarator & D,ParsedAttributes & FirstArgAttrs,SmallVectorImpl<DeclaratorChunk::ParamInfo> & ParamInfo,SourceLocation & EllipsisLoc)5542 void Parser::ParseParameterDeclarationClause(
5543 Declarator &D,
5544 ParsedAttributes &FirstArgAttrs,
5545 SmallVectorImpl<DeclaratorChunk::ParamInfo> &ParamInfo,
5546 SourceLocation &EllipsisLoc) {
5547 do {
5548 // FIXME: Issue a diagnostic if we parsed an attribute-specifier-seq
5549 // before deciding this was a parameter-declaration-clause.
5550 if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
5551 break;
5552
5553 // Parse the declaration-specifiers.
5554 // Just use the ParsingDeclaration "scope" of the declarator.
5555 DeclSpec DS(AttrFactory);
5556
5557 // Parse any C++11 attributes.
5558 MaybeParseCXX11Attributes(DS.getAttributes());
5559
5560 // Skip any Microsoft attributes before a param.
5561 MaybeParseMicrosoftAttributes(DS.getAttributes());
5562
5563 SourceLocation DSStart = Tok.getLocation();
5564
5565 // If the caller parsed attributes for the first argument, add them now.
5566 // Take them so that we only apply the attributes to the first parameter.
5567 // FIXME: If we can leave the attributes in the token stream somehow, we can
5568 // get rid of a parameter (FirstArgAttrs) and this statement. It might be
5569 // too much hassle.
5570 DS.takeAttributesFrom(FirstArgAttrs);
5571
5572 ParseDeclarationSpecifiers(DS);
5573
5574
5575 // Parse the declarator. This is "PrototypeContext" or
5576 // "LambdaExprParameterContext", because we must accept either
5577 // 'declarator' or 'abstract-declarator' here.
5578 Declarator ParmDeclarator(DS,
5579 D.getContext() == Declarator::LambdaExprContext ?
5580 Declarator::LambdaExprParameterContext :
5581 Declarator::PrototypeContext);
5582 ParseDeclarator(ParmDeclarator);
5583
5584 // Parse GNU attributes, if present.
5585 MaybeParseGNUAttributes(ParmDeclarator);
5586
5587 // Remember this parsed parameter in ParamInfo.
5588 IdentifierInfo *ParmII = ParmDeclarator.getIdentifier();
5589
5590 // DefArgToks is used when the parsing of default arguments needs
5591 // to be delayed.
5592 CachedTokens *DefArgToks = nullptr;
5593
5594 // If no parameter was specified, verify that *something* was specified,
5595 // otherwise we have a missing type and identifier.
5596 if (DS.isEmpty() && ParmDeclarator.getIdentifier() == nullptr &&
5597 ParmDeclarator.getNumTypeObjects() == 0) {
5598 // Completely missing, emit error.
5599 Diag(DSStart, diag::err_missing_param);
5600 } else {
5601 // Otherwise, we have something. Add it and let semantic analysis try
5602 // to grok it and add the result to the ParamInfo we are building.
5603
5604 // Last chance to recover from a misplaced ellipsis in an attempted
5605 // parameter pack declaration.
5606 if (Tok.is(tok::ellipsis) &&
5607 (NextToken().isNot(tok::r_paren) ||
5608 (!ParmDeclarator.getEllipsisLoc().isValid() &&
5609 !Actions.isUnexpandedParameterPackPermitted())) &&
5610 Actions.containsUnexpandedParameterPacks(ParmDeclarator))
5611 DiagnoseMisplacedEllipsisInDeclarator(ConsumeToken(), ParmDeclarator);
5612
5613 // Inform the actions module about the parameter declarator, so it gets
5614 // added to the current scope.
5615 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
5616 // Parse the default argument, if any. We parse the default
5617 // arguments in all dialects; the semantic analysis in
5618 // ActOnParamDefaultArgument will reject the default argument in
5619 // C.
5620 if (Tok.is(tok::equal)) {
5621 SourceLocation EqualLoc = Tok.getLocation();
5622
5623 // Parse the default argument
5624 if (D.getContext() == Declarator::MemberContext) {
5625 // If we're inside a class definition, cache the tokens
5626 // corresponding to the default argument. We'll actually parse
5627 // them when we see the end of the class definition.
5628 // FIXME: Can we use a smart pointer for Toks?
5629 DefArgToks = new CachedTokens;
5630
5631 SourceLocation ArgStartLoc = NextToken().getLocation();
5632 if (!ConsumeAndStoreInitializer(*DefArgToks, CIK_DefaultArgument)) {
5633 delete DefArgToks;
5634 DefArgToks = nullptr;
5635 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
5636 } else {
5637 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
5638 ArgStartLoc);
5639 }
5640 } else {
5641 // Consume the '='.
5642 ConsumeToken();
5643
5644 // The argument isn't actually potentially evaluated unless it is
5645 // used.
5646 EnterExpressionEvaluationContext Eval(Actions,
5647 Sema::PotentiallyEvaluatedIfUsed,
5648 Param);
5649
5650 ExprResult DefArgResult;
5651 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
5652 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
5653 DefArgResult = ParseBraceInitializer();
5654 } else
5655 DefArgResult = ParseAssignmentExpression();
5656 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
5657 if (DefArgResult.isInvalid()) {
5658 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
5659 SkipUntil(tok::comma, tok::r_paren, StopAtSemi | StopBeforeMatch);
5660 } else {
5661 // Inform the actions module about the default argument
5662 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
5663 DefArgResult.get());
5664 }
5665 }
5666 }
5667
5668 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
5669 ParmDeclarator.getIdentifierLoc(),
5670 Param, DefArgToks));
5671 }
5672
5673 if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
5674 if (!getLangOpts().CPlusPlus) {
5675 // We have ellipsis without a preceding ',', which is ill-formed
5676 // in C. Complain and provide the fix.
5677 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
5678 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
5679 } else if (ParmDeclarator.getEllipsisLoc().isValid() ||
5680 Actions.containsUnexpandedParameterPacks(ParmDeclarator)) {
5681 // It looks like this was supposed to be a parameter pack. Warn and
5682 // point out where the ellipsis should have gone.
5683 SourceLocation ParmEllipsis = ParmDeclarator.getEllipsisLoc();
5684 Diag(EllipsisLoc, diag::warn_misplaced_ellipsis_vararg)
5685 << ParmEllipsis.isValid() << ParmEllipsis;
5686 if (ParmEllipsis.isValid()) {
5687 Diag(ParmEllipsis,
5688 diag::note_misplaced_ellipsis_vararg_existing_ellipsis);
5689 } else {
5690 Diag(ParmDeclarator.getIdentifierLoc(),
5691 diag::note_misplaced_ellipsis_vararg_add_ellipsis)
5692 << FixItHint::CreateInsertion(ParmDeclarator.getIdentifierLoc(),
5693 "...")
5694 << !ParmDeclarator.hasName();
5695 }
5696 Diag(EllipsisLoc, diag::note_misplaced_ellipsis_vararg_add_comma)
5697 << FixItHint::CreateInsertion(EllipsisLoc, ", ");
5698 }
5699
5700 // We can't have any more parameters after an ellipsis.
5701 break;
5702 }
5703
5704 // If the next token is a comma, consume it and keep reading arguments.
5705 } while (TryConsumeToken(tok::comma));
5706 }
5707
5708 /// [C90] direct-declarator '[' constant-expression[opt] ']'
5709 /// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
5710 /// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
5711 /// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
5712 /// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
5713 /// [C++11] direct-declarator '[' constant-expression[opt] ']'
5714 /// attribute-specifier-seq[opt]
ParseBracketDeclarator(Declarator & D)5715 void Parser::ParseBracketDeclarator(Declarator &D) {
5716 if (CheckProhibitedCXX11Attribute())
5717 return;
5718
5719 BalancedDelimiterTracker T(*this, tok::l_square);
5720 T.consumeOpen();
5721
5722 // C array syntax has many features, but by-far the most common is [] and [4].
5723 // This code does a fast path to handle some of the most obvious cases.
5724 if (Tok.getKind() == tok::r_square) {
5725 T.consumeClose();
5726 ParsedAttributes attrs(AttrFactory);
5727 MaybeParseCXX11Attributes(attrs);
5728
5729 // Remember that we parsed the empty array type.
5730 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, nullptr,
5731 T.getOpenLocation(),
5732 T.getCloseLocation()),
5733 attrs, T.getCloseLocation());
5734 return;
5735 } else if (Tok.getKind() == tok::numeric_constant &&
5736 GetLookAheadToken(1).is(tok::r_square)) {
5737 // [4] is very common. Parse the numeric constant expression.
5738 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok, getCurScope()));
5739 ConsumeToken();
5740
5741 T.consumeClose();
5742 ParsedAttributes attrs(AttrFactory);
5743 MaybeParseCXX11Attributes(attrs);
5744
5745 // Remember that we parsed a array type, and remember its features.
5746 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false,
5747 ExprRes.get(),
5748 T.getOpenLocation(),
5749 T.getCloseLocation()),
5750 attrs, T.getCloseLocation());
5751 return;
5752 }
5753
5754 // If valid, this location is the position where we read the 'static' keyword.
5755 SourceLocation StaticLoc;
5756 TryConsumeToken(tok::kw_static, StaticLoc);
5757
5758 // If there is a type-qualifier-list, read it now.
5759 // Type qualifiers in an array subscript are a C99 feature.
5760 DeclSpec DS(AttrFactory);
5761 ParseTypeQualifierListOpt(DS, AR_CXX11AttributesParsed);
5762
5763 // If we haven't already read 'static', check to see if there is one after the
5764 // type-qualifier-list.
5765 if (!StaticLoc.isValid())
5766 TryConsumeToken(tok::kw_static, StaticLoc);
5767
5768 // Handle "direct-declarator [ type-qual-list[opt] * ]".
5769 bool isStar = false;
5770 ExprResult NumElements;
5771
5772 // Handle the case where we have '[*]' as the array size. However, a leading
5773 // star could be the start of an expression, for example 'X[*p + 4]'. Verify
5774 // the token after the star is a ']'. Since stars in arrays are
5775 // infrequent, use of lookahead is not costly here.
5776 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
5777 ConsumeToken(); // Eat the '*'.
5778
5779 if (StaticLoc.isValid()) {
5780 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
5781 StaticLoc = SourceLocation(); // Drop the static.
5782 }
5783 isStar = true;
5784 } else if (Tok.isNot(tok::r_square)) {
5785 // Note, in C89, this production uses the constant-expr production instead
5786 // of assignment-expr. The only difference is that assignment-expr allows
5787 // things like '=' and '*='. Sema rejects these in C89 mode because they
5788 // are not i-c-e's, so we don't need to distinguish between the two here.
5789
5790 // Parse the constant-expression or assignment-expression now (depending
5791 // on dialect).
5792 if (getLangOpts().CPlusPlus) {
5793 NumElements = ParseConstantExpression();
5794 } else {
5795 EnterExpressionEvaluationContext Unevaluated(Actions,
5796 Sema::ConstantEvaluated);
5797 NumElements =
5798 Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
5799 }
5800 } else {
5801 if (StaticLoc.isValid()) {
5802 Diag(StaticLoc, diag::err_unspecified_size_with_static);
5803 StaticLoc = SourceLocation(); // Drop the static.
5804 }
5805 }
5806
5807 // If there was an error parsing the assignment-expression, recover.
5808 if (NumElements.isInvalid()) {
5809 D.setInvalidType(true);
5810 // If the expression was invalid, skip it.
5811 SkipUntil(tok::r_square, StopAtSemi);
5812 return;
5813 }
5814
5815 T.consumeClose();
5816
5817 ParsedAttributes attrs(AttrFactory);
5818 MaybeParseCXX11Attributes(attrs);
5819
5820 // Remember that we parsed a array type, and remember its features.
5821 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
5822 StaticLoc.isValid(), isStar,
5823 NumElements.get(),
5824 T.getOpenLocation(),
5825 T.getCloseLocation()),
5826 attrs, T.getCloseLocation());
5827 }
5828
5829 /// Diagnose brackets before an identifier.
ParseMisplacedBracketDeclarator(Declarator & D)5830 void Parser::ParseMisplacedBracketDeclarator(Declarator &D) {
5831 assert(Tok.is(tok::l_square) && "Missing opening bracket");
5832 assert(!D.mayOmitIdentifier() && "Declarator cannot omit identifier");
5833
5834 SourceLocation StartBracketLoc = Tok.getLocation();
5835 Declarator TempDeclarator(D.getDeclSpec(), D.getContext());
5836
5837 while (Tok.is(tok::l_square)) {
5838 ParseBracketDeclarator(TempDeclarator);
5839 }
5840
5841 // Stuff the location of the start of the brackets into the Declarator.
5842 // The diagnostics from ParseDirectDeclarator will make more sense if
5843 // they use this location instead.
5844 if (Tok.is(tok::semi))
5845 D.getName().EndLocation = StartBracketLoc;
5846
5847 SourceLocation SuggestParenLoc = Tok.getLocation();
5848
5849 // Now that the brackets are removed, try parsing the declarator again.
5850 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
5851
5852 // Something went wrong parsing the brackets, in which case,
5853 // ParseBracketDeclarator has emitted an error, and we don't need to emit
5854 // one here.
5855 if (TempDeclarator.getNumTypeObjects() == 0)
5856 return;
5857
5858 // Determine if parens will need to be suggested in the diagnostic.
5859 bool NeedParens = false;
5860 if (D.getNumTypeObjects() != 0) {
5861 switch (D.getTypeObject(D.getNumTypeObjects() - 1).Kind) {
5862 case DeclaratorChunk::Pointer:
5863 case DeclaratorChunk::Reference:
5864 case DeclaratorChunk::BlockPointer:
5865 case DeclaratorChunk::MemberPointer:
5866 NeedParens = true;
5867 break;
5868 case DeclaratorChunk::Array:
5869 case DeclaratorChunk::Function:
5870 case DeclaratorChunk::Paren:
5871 break;
5872 }
5873 }
5874
5875 if (NeedParens) {
5876 // Create a DeclaratorChunk for the inserted parens.
5877 ParsedAttributes attrs(AttrFactory);
5878 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
5879 D.AddTypeInfo(DeclaratorChunk::getParen(SuggestParenLoc, EndLoc), attrs,
5880 SourceLocation());
5881 }
5882
5883 // Adding back the bracket info to the end of the Declarator.
5884 for (unsigned i = 0, e = TempDeclarator.getNumTypeObjects(); i < e; ++i) {
5885 const DeclaratorChunk &Chunk = TempDeclarator.getTypeObject(i);
5886 ParsedAttributes attrs(AttrFactory);
5887 attrs.set(Chunk.Common.AttrList);
5888 D.AddTypeInfo(Chunk, attrs, SourceLocation());
5889 }
5890
5891 // The missing identifier would have been diagnosed in ParseDirectDeclarator.
5892 // If parentheses are required, always suggest them.
5893 if (!D.getIdentifier() && !NeedParens)
5894 return;
5895
5896 SourceLocation EndBracketLoc = TempDeclarator.getLocEnd();
5897
5898 // Generate the move bracket error message.
5899 SourceRange BracketRange(StartBracketLoc, EndBracketLoc);
5900 SourceLocation EndLoc = PP.getLocForEndOfToken(D.getLocEnd());
5901
5902 if (NeedParens) {
5903 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
5904 << getLangOpts().CPlusPlus
5905 << FixItHint::CreateInsertion(SuggestParenLoc, "(")
5906 << FixItHint::CreateInsertion(EndLoc, ")")
5907 << FixItHint::CreateInsertionFromRange(
5908 EndLoc, CharSourceRange(BracketRange, true))
5909 << FixItHint::CreateRemoval(BracketRange);
5910 } else {
5911 Diag(EndLoc, diag::err_brackets_go_after_unqualified_id)
5912 << getLangOpts().CPlusPlus
5913 << FixItHint::CreateInsertionFromRange(
5914 EndLoc, CharSourceRange(BracketRange, true))
5915 << FixItHint::CreateRemoval(BracketRange);
5916 }
5917 }
5918
5919 /// [GNU] typeof-specifier:
5920 /// typeof ( expressions )
5921 /// typeof ( type-name )
5922 /// [GNU/C++] typeof unary-expression
5923 ///
ParseTypeofSpecifier(DeclSpec & DS)5924 void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
5925 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
5926 Token OpTok = Tok;
5927 SourceLocation StartLoc = ConsumeToken();
5928
5929 const bool hasParens = Tok.is(tok::l_paren);
5930
5931 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated,
5932 Sema::ReuseLambdaContextDecl);
5933
5934 bool isCastExpr;
5935 ParsedType CastTy;
5936 SourceRange CastRange;
5937 ExprResult Operand = Actions.CorrectDelayedTyposInExpr(
5938 ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr, CastTy, CastRange));
5939 if (hasParens)
5940 DS.setTypeofParensRange(CastRange);
5941
5942 if (CastRange.getEnd().isInvalid())
5943 // FIXME: Not accurate, the range gets one token more than it should.
5944 DS.SetRangeEnd(Tok.getLocation());
5945 else
5946 DS.SetRangeEnd(CastRange.getEnd());
5947
5948 if (isCastExpr) {
5949 if (!CastTy) {
5950 DS.SetTypeSpecError();
5951 return;
5952 }
5953
5954 const char *PrevSpec = nullptr;
5955 unsigned DiagID;
5956 // Check for duplicate type specifiers (e.g. "int typeof(int)").
5957 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
5958 DiagID, CastTy,
5959 Actions.getASTContext().getPrintingPolicy()))
5960 Diag(StartLoc, DiagID) << PrevSpec;
5961 return;
5962 }
5963
5964 // If we get here, the operand to the typeof was an expresion.
5965 if (Operand.isInvalid()) {
5966 DS.SetTypeSpecError();
5967 return;
5968 }
5969
5970 // We might need to transform the operand if it is potentially evaluated.
5971 Operand = Actions.HandleExprEvaluationContextForTypeof(Operand.get());
5972 if (Operand.isInvalid()) {
5973 DS.SetTypeSpecError();
5974 return;
5975 }
5976
5977 const char *PrevSpec = nullptr;
5978 unsigned DiagID;
5979 // Check for duplicate type specifiers (e.g. "int typeof(int)").
5980 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
5981 DiagID, Operand.get(),
5982 Actions.getASTContext().getPrintingPolicy()))
5983 Diag(StartLoc, DiagID) << PrevSpec;
5984 }
5985
5986 /// [C11] atomic-specifier:
5987 /// _Atomic ( type-name )
5988 ///
ParseAtomicSpecifier(DeclSpec & DS)5989 void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
5990 assert(Tok.is(tok::kw__Atomic) && NextToken().is(tok::l_paren) &&
5991 "Not an atomic specifier");
5992
5993 SourceLocation StartLoc = ConsumeToken();
5994 BalancedDelimiterTracker T(*this, tok::l_paren);
5995 if (T.consumeOpen())
5996 return;
5997
5998 TypeResult Result = ParseTypeName();
5999 if (Result.isInvalid()) {
6000 SkipUntil(tok::r_paren, StopAtSemi);
6001 return;
6002 }
6003
6004 // Match the ')'
6005 T.consumeClose();
6006
6007 if (T.getCloseLocation().isInvalid())
6008 return;
6009
6010 DS.setTypeofParensRange(T.getRange());
6011 DS.SetRangeEnd(T.getCloseLocation());
6012
6013 const char *PrevSpec = nullptr;
6014 unsigned DiagID;
6015 if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
6016 DiagID, Result.get(),
6017 Actions.getASTContext().getPrintingPolicy()))
6018 Diag(StartLoc, DiagID) << PrevSpec;
6019 }
6020
6021
6022 /// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
6023 /// from TryAltiVecVectorToken.
TryAltiVecVectorTokenOutOfLine()6024 bool Parser::TryAltiVecVectorTokenOutOfLine() {
6025 Token Next = NextToken();
6026 switch (Next.getKind()) {
6027 default: return false;
6028 case tok::kw_short:
6029 case tok::kw_long:
6030 case tok::kw_signed:
6031 case tok::kw_unsigned:
6032 case tok::kw_void:
6033 case tok::kw_char:
6034 case tok::kw_int:
6035 case tok::kw_float:
6036 case tok::kw_double:
6037 case tok::kw_bool:
6038 case tok::kw___bool:
6039 case tok::kw___pixel:
6040 Tok.setKind(tok::kw___vector);
6041 return true;
6042 case tok::identifier:
6043 if (Next.getIdentifierInfo() == Ident_pixel) {
6044 Tok.setKind(tok::kw___vector);
6045 return true;
6046 }
6047 if (Next.getIdentifierInfo() == Ident_bool) {
6048 Tok.setKind(tok::kw___vector);
6049 return true;
6050 }
6051 return false;
6052 }
6053 }
6054
TryAltiVecTokenOutOfLine(DeclSpec & DS,SourceLocation Loc,const char * & PrevSpec,unsigned & DiagID,bool & isInvalid)6055 bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
6056 const char *&PrevSpec, unsigned &DiagID,
6057 bool &isInvalid) {
6058 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
6059 if (Tok.getIdentifierInfo() == Ident_vector) {
6060 Token Next = NextToken();
6061 switch (Next.getKind()) {
6062 case tok::kw_short:
6063 case tok::kw_long:
6064 case tok::kw_signed:
6065 case tok::kw_unsigned:
6066 case tok::kw_void:
6067 case tok::kw_char:
6068 case tok::kw_int:
6069 case tok::kw_float:
6070 case tok::kw_double:
6071 case tok::kw_bool:
6072 case tok::kw___bool:
6073 case tok::kw___pixel:
6074 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID, Policy);
6075 return true;
6076 case tok::identifier:
6077 if (Next.getIdentifierInfo() == Ident_pixel) {
6078 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6079 return true;
6080 }
6081 if (Next.getIdentifierInfo() == Ident_bool) {
6082 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID,Policy);
6083 return true;
6084 }
6085 break;
6086 default:
6087 break;
6088 }
6089 } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
6090 DS.isTypeAltiVecVector()) {
6091 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID, Policy);
6092 return true;
6093 } else if ((Tok.getIdentifierInfo() == Ident_bool) &&
6094 DS.isTypeAltiVecVector()) {
6095 isInvalid = DS.SetTypeAltiVecBool(true, Loc, PrevSpec, DiagID, Policy);
6096 return true;
6097 }
6098 return false;
6099 }
6100