ParseDecl.cpp revision bfad9150bfa894195a43c5f487117672a449f90f
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 "clang/Parse/ParseDiagnostic.h" 16#include "clang/Basic/OpenCL.h" 17#include "clang/Sema/Scope.h" 18#include "clang/Sema/ParsedTemplate.h" 19#include "clang/Sema/PrettyDeclStackTrace.h" 20#include "RAIIObjectsForParser.h" 21#include "llvm/ADT/SmallSet.h" 22using namespace clang; 23 24//===----------------------------------------------------------------------===// 25// C99 6.7: Declarations. 26//===----------------------------------------------------------------------===// 27 28/// ParseTypeName 29/// type-name: [C99 6.7.6] 30/// specifier-qualifier-list abstract-declarator[opt] 31/// 32/// Called type-id in C++. 33TypeResult Parser::ParseTypeName(SourceRange *Range, 34 Declarator::TheContext Context) { 35 // Parse the common declaration-specifiers piece. 36 DeclSpec DS(AttrFactory); 37 ParseSpecifierQualifierList(DS); 38 39 // Parse the abstract-declarator, if present. 40 Declarator DeclaratorInfo(DS, Context); 41 ParseDeclarator(DeclaratorInfo); 42 if (Range) 43 *Range = DeclaratorInfo.getSourceRange(); 44 45 if (DeclaratorInfo.isInvalidType()) 46 return true; 47 48 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 49} 50 51/// ParseGNUAttributes - Parse a non-empty attributes list. 52/// 53/// [GNU] attributes: 54/// attribute 55/// attributes attribute 56/// 57/// [GNU] attribute: 58/// '__attribute__' '(' '(' attribute-list ')' ')' 59/// 60/// [GNU] attribute-list: 61/// attrib 62/// attribute_list ',' attrib 63/// 64/// [GNU] attrib: 65/// empty 66/// attrib-name 67/// attrib-name '(' identifier ')' 68/// attrib-name '(' identifier ',' nonempty-expr-list ')' 69/// attrib-name '(' argument-expression-list [C99 6.5.2] ')' 70/// 71/// [GNU] attrib-name: 72/// identifier 73/// typespec 74/// typequal 75/// storageclass 76/// 77/// FIXME: The GCC grammar/code for this construct implies we need two 78/// token lookahead. Comment from gcc: "If they start with an identifier 79/// which is followed by a comma or close parenthesis, then the arguments 80/// start with that identifier; otherwise they are an expression list." 81/// 82/// At the moment, I am not doing 2 token lookahead. I am also unaware of 83/// any attributes that don't work (based on my limited testing). Most 84/// attributes are very simple in practice. Until we find a bug, I don't see 85/// a pressing need to implement the 2 token lookahead. 86 87void Parser::ParseGNUAttributes(ParsedAttributes &attrs, 88 SourceLocation *endLoc) { 89 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!"); 90 91 while (Tok.is(tok::kw___attribute)) { 92 ConsumeToken(); 93 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 94 "attribute")) { 95 SkipUntil(tok::r_paren, true); // skip until ) or ; 96 return; 97 } 98 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) { 99 SkipUntil(tok::r_paren, true); // skip until ) or ; 100 return; 101 } 102 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") )) 103 while (Tok.is(tok::identifier) || isDeclarationSpecifier() || 104 Tok.is(tok::comma)) { 105 106 if (Tok.is(tok::comma)) { 107 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,)) 108 ConsumeToken(); 109 continue; 110 } 111 // we have an identifier or declaration specifier (const, int, etc.) 112 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 113 SourceLocation AttrNameLoc = ConsumeToken(); 114 115 // Availability attributes have their own grammar. 116 if (AttrName->isStr("availability")) 117 ParseAvailabilityAttribute(*AttrName, AttrNameLoc, attrs, endLoc); 118 // check if we have a "parameterized" attribute 119 else if (Tok.is(tok::l_paren)) { 120 ConsumeParen(); // ignore the left paren loc for now 121 122 if (Tok.is(tok::identifier)) { 123 IdentifierInfo *ParmName = Tok.getIdentifierInfo(); 124 SourceLocation ParmLoc = ConsumeToken(); 125 126 if (Tok.is(tok::r_paren)) { 127 // __attribute__(( mode(byte) )) 128 ConsumeParen(); // ignore the right paren loc for now 129 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 130 ParmName, ParmLoc, 0, 0); 131 } else if (Tok.is(tok::comma)) { 132 ConsumeToken(); 133 // __attribute__(( format(printf, 1, 2) )) 134 ExprVector ArgExprs(Actions); 135 bool ArgExprsOk = true; 136 137 // now parse the non-empty comma separated list of expressions 138 while (1) { 139 ExprResult ArgExpr(ParseAssignmentExpression()); 140 if (ArgExpr.isInvalid()) { 141 ArgExprsOk = false; 142 SkipUntil(tok::r_paren); 143 break; 144 } else { 145 ArgExprs.push_back(ArgExpr.release()); 146 } 147 if (Tok.isNot(tok::comma)) 148 break; 149 ConsumeToken(); // Eat the comma, move to the next argument 150 } 151 if (ArgExprsOk && Tok.is(tok::r_paren)) { 152 ConsumeParen(); // ignore the right paren loc for now 153 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 154 ParmName, ParmLoc, ArgExprs.take(), ArgExprs.size()); 155 } 156 } 157 } else { // not an identifier 158 switch (Tok.getKind()) { 159 case tok::r_paren: 160 // parse a possibly empty comma separated list of expressions 161 // __attribute__(( nonnull() )) 162 ConsumeParen(); // ignore the right paren loc for now 163 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 164 0, SourceLocation(), 0, 0); 165 break; 166 case tok::kw_char: 167 case tok::kw_wchar_t: 168 case tok::kw_char16_t: 169 case tok::kw_char32_t: 170 case tok::kw_bool: 171 case tok::kw_short: 172 case tok::kw_int: 173 case tok::kw_long: 174 case tok::kw___int64: 175 case tok::kw_signed: 176 case tok::kw_unsigned: 177 case tok::kw_float: 178 case tok::kw_double: 179 case tok::kw_void: 180 case tok::kw_typeof: { 181 AttributeList *attr 182 = attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 183 0, SourceLocation(), 0, 0); 184 if (attr->getKind() == AttributeList::AT_IBOutletCollection) 185 Diag(Tok, diag::err_iboutletcollection_builtintype); 186 // If it's a builtin type name, eat it and expect a rparen 187 // __attribute__(( vec_type_hint(char) )) 188 ConsumeToken(); 189 if (Tok.is(tok::r_paren)) 190 ConsumeParen(); 191 break; 192 } 193 default: 194 // __attribute__(( aligned(16) )) 195 ExprVector ArgExprs(Actions); 196 bool ArgExprsOk = true; 197 198 // now parse the list of expressions 199 while (1) { 200 ExprResult ArgExpr(ParseAssignmentExpression()); 201 if (ArgExpr.isInvalid()) { 202 ArgExprsOk = false; 203 SkipUntil(tok::r_paren); 204 break; 205 } else { 206 ArgExprs.push_back(ArgExpr.release()); 207 } 208 if (Tok.isNot(tok::comma)) 209 break; 210 ConsumeToken(); // Eat the comma, move to the next argument 211 } 212 // Match the ')'. 213 if (ArgExprsOk && Tok.is(tok::r_paren)) { 214 ConsumeParen(); // ignore the right paren loc for now 215 attrs.addNew(AttrName, AttrNameLoc, 0, 216 AttrNameLoc, 0, SourceLocation(), 217 ArgExprs.take(), ArgExprs.size()); 218 } 219 break; 220 } 221 } 222 } else { 223 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 224 0, SourceLocation(), 0, 0); 225 } 226 } 227 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 228 SkipUntil(tok::r_paren, false); 229 SourceLocation Loc = Tok.getLocation(); 230 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) { 231 SkipUntil(tok::r_paren, false); 232 } 233 if (endLoc) 234 *endLoc = Loc; 235 } 236} 237 238/// ParseMicrosoftDeclSpec - Parse an __declspec construct 239/// 240/// [MS] decl-specifier: 241/// __declspec ( extended-decl-modifier-seq ) 242/// 243/// [MS] extended-decl-modifier-seq: 244/// extended-decl-modifier[opt] 245/// extended-decl-modifier extended-decl-modifier-seq 246 247void Parser::ParseMicrosoftDeclSpec(ParsedAttributes &attrs) { 248 assert(Tok.is(tok::kw___declspec) && "Not a declspec!"); 249 250 ConsumeToken(); 251 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 252 "declspec")) { 253 SkipUntil(tok::r_paren, true); // skip until ) or ; 254 return; 255 } 256 while (Tok.getIdentifierInfo()) { 257 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 258 SourceLocation AttrNameLoc = ConsumeToken(); 259 if (Tok.is(tok::l_paren)) { 260 ConsumeParen(); 261 // FIXME: This doesn't parse __declspec(property(get=get_func_name)) 262 // correctly. 263 ExprResult ArgExpr(ParseAssignmentExpression()); 264 if (!ArgExpr.isInvalid()) { 265 Expr *ExprList = ArgExpr.take(); 266 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 267 SourceLocation(), &ExprList, 1, true); 268 } 269 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 270 SkipUntil(tok::r_paren, false); 271 } else { 272 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 273 0, SourceLocation(), 0, 0, true); 274 } 275 } 276 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 277 SkipUntil(tok::r_paren, false); 278 return; 279} 280 281void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) { 282 // Treat these like attributes 283 // FIXME: Allow Sema to distinguish between these and real attributes! 284 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) || 285 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___cdecl) || 286 Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) { 287 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 288 SourceLocation AttrNameLoc = ConsumeToken(); 289 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) 290 // FIXME: Support these properly! 291 continue; 292 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 293 SourceLocation(), 0, 0, true); 294 } 295} 296 297void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) { 298 // Treat these like attributes 299 while (Tok.is(tok::kw___pascal)) { 300 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 301 SourceLocation AttrNameLoc = ConsumeToken(); 302 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 303 SourceLocation(), 0, 0, true); 304 } 305} 306 307void Parser::ParseOpenCLAttributes(ParsedAttributes &attrs) { 308 // Treat these like attributes 309 while (Tok.is(tok::kw___kernel)) { 310 SourceLocation AttrNameLoc = ConsumeToken(); 311 attrs.addNew(PP.getIdentifierInfo("opencl_kernel_function"), 312 AttrNameLoc, 0, AttrNameLoc, 0, 313 SourceLocation(), 0, 0, false); 314 } 315} 316 317void Parser::ParseOpenCLQualifiers(DeclSpec &DS) { 318 SourceLocation Loc = Tok.getLocation(); 319 switch(Tok.getKind()) { 320 // OpenCL qualifiers: 321 case tok::kw___private: 322 case tok::kw_private: 323 DS.getAttributes().addNewInteger( 324 Actions.getASTContext(), 325 PP.getIdentifierInfo("address_space"), Loc, 0); 326 break; 327 328 case tok::kw___global: 329 DS.getAttributes().addNewInteger( 330 Actions.getASTContext(), 331 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_global); 332 break; 333 334 case tok::kw___local: 335 DS.getAttributes().addNewInteger( 336 Actions.getASTContext(), 337 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_local); 338 break; 339 340 case tok::kw___constant: 341 DS.getAttributes().addNewInteger( 342 Actions.getASTContext(), 343 PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_constant); 344 break; 345 346 case tok::kw___read_only: 347 DS.getAttributes().addNewInteger( 348 Actions.getASTContext(), 349 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_only); 350 break; 351 352 case tok::kw___write_only: 353 DS.getAttributes().addNewInteger( 354 Actions.getASTContext(), 355 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_write_only); 356 break; 357 358 case tok::kw___read_write: 359 DS.getAttributes().addNewInteger( 360 Actions.getASTContext(), 361 PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_write); 362 break; 363 default: break; 364 } 365} 366 367/// \brief Parse a version number. 368/// 369/// version: 370/// simple-integer 371/// simple-integer ',' simple-integer 372/// simple-integer ',' simple-integer ',' simple-integer 373VersionTuple Parser::ParseVersionTuple(SourceRange &Range) { 374 Range = Tok.getLocation(); 375 376 if (!Tok.is(tok::numeric_constant)) { 377 Diag(Tok, diag::err_expected_version); 378 SkipUntil(tok::comma, tok::r_paren, true, true, true); 379 return VersionTuple(); 380 } 381 382 // Parse the major (and possibly minor and subminor) versions, which 383 // are stored in the numeric constant. We utilize a quirk of the 384 // lexer, which is that it handles something like 1.2.3 as a single 385 // numeric constant, rather than two separate tokens. 386 llvm::SmallString<512> Buffer; 387 Buffer.resize(Tok.getLength()+1); 388 const char *ThisTokBegin = &Buffer[0]; 389 390 // Get the spelling of the token, which eliminates trigraphs, etc. 391 bool Invalid = false; 392 unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid); 393 if (Invalid) 394 return VersionTuple(); 395 396 // Parse the major version. 397 unsigned AfterMajor = 0; 398 unsigned Major = 0; 399 while (AfterMajor < ActualLength && isdigit(ThisTokBegin[AfterMajor])) { 400 Major = Major * 10 + ThisTokBegin[AfterMajor] - '0'; 401 ++AfterMajor; 402 } 403 404 if (AfterMajor == 0) { 405 Diag(Tok, diag::err_expected_version); 406 SkipUntil(tok::comma, tok::r_paren, true, true, true); 407 return VersionTuple(); 408 } 409 410 if (AfterMajor == ActualLength) { 411 ConsumeToken(); 412 413 // We only had a single version component. 414 if (Major == 0) { 415 Diag(Tok, diag::err_zero_version); 416 return VersionTuple(); 417 } 418 419 return VersionTuple(Major); 420 } 421 422 if (ThisTokBegin[AfterMajor] != '.' || (AfterMajor + 1 == ActualLength)) { 423 Diag(Tok, diag::err_expected_version); 424 SkipUntil(tok::comma, tok::r_paren, true, true, true); 425 return VersionTuple(); 426 } 427 428 // Parse the minor version. 429 unsigned AfterMinor = AfterMajor + 1; 430 unsigned Minor = 0; 431 while (AfterMinor < ActualLength && isdigit(ThisTokBegin[AfterMinor])) { 432 Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0'; 433 ++AfterMinor; 434 } 435 436 if (AfterMinor == ActualLength) { 437 ConsumeToken(); 438 439 // We had major.minor. 440 if (Major == 0 && Minor == 0) { 441 Diag(Tok, diag::err_zero_version); 442 return VersionTuple(); 443 } 444 445 return VersionTuple(Major, Minor); 446 } 447 448 // If what follows is not a '.', we have a problem. 449 if (ThisTokBegin[AfterMinor] != '.') { 450 Diag(Tok, diag::err_expected_version); 451 SkipUntil(tok::comma, tok::r_paren, true, true, true); 452 return VersionTuple(); 453 } 454 455 // Parse the subminor version. 456 unsigned AfterSubminor = AfterMinor + 1; 457 unsigned Subminor = 0; 458 while (AfterSubminor < ActualLength && isdigit(ThisTokBegin[AfterSubminor])) { 459 Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0'; 460 ++AfterSubminor; 461 } 462 463 if (AfterSubminor != ActualLength) { 464 Diag(Tok, diag::err_expected_version); 465 SkipUntil(tok::comma, tok::r_paren, true, true, true); 466 return VersionTuple(); 467 } 468 ConsumeToken(); 469 return VersionTuple(Major, Minor, Subminor); 470} 471 472/// \brief Parse the contents of the "availability" attribute. 473/// 474/// availability-attribute: 475/// 'availability' '(' platform ',' version-arg-list ')' 476/// 477/// platform: 478/// identifier 479/// 480/// version-arg-list: 481/// version-arg 482/// version-arg ',' version-arg-list 483/// 484/// version-arg: 485/// 'introduced' '=' version 486/// 'deprecated' '=' version 487/// 'removed' = version 488/// 'unavailable' 489void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability, 490 SourceLocation AvailabilityLoc, 491 ParsedAttributes &attrs, 492 SourceLocation *endLoc) { 493 SourceLocation PlatformLoc; 494 IdentifierInfo *Platform = 0; 495 496 enum { Introduced, Deprecated, Obsoleted, Unknown }; 497 AvailabilityChange Changes[Unknown]; 498 499 // Opening '('. 500 SourceLocation LParenLoc; 501 if (!Tok.is(tok::l_paren)) { 502 Diag(Tok, diag::err_expected_lparen); 503 return; 504 } 505 LParenLoc = ConsumeParen(); 506 507 // Parse the platform name, 508 if (Tok.isNot(tok::identifier)) { 509 Diag(Tok, diag::err_availability_expected_platform); 510 SkipUntil(tok::r_paren); 511 return; 512 } 513 Platform = Tok.getIdentifierInfo(); 514 PlatformLoc = ConsumeToken(); 515 516 // Parse the ',' following the platform name. 517 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::r_paren)) 518 return; 519 520 // If we haven't grabbed the pointers for the identifiers 521 // "introduced", "deprecated", and "obsoleted", do so now. 522 if (!Ident_introduced) { 523 Ident_introduced = PP.getIdentifierInfo("introduced"); 524 Ident_deprecated = PP.getIdentifierInfo("deprecated"); 525 Ident_obsoleted = PP.getIdentifierInfo("obsoleted"); 526 Ident_unavailable = PP.getIdentifierInfo("unavailable"); 527 } 528 529 // Parse the set of introductions/deprecations/removals. 530 SourceLocation UnavailableLoc; 531 do { 532 if (Tok.isNot(tok::identifier)) { 533 Diag(Tok, diag::err_availability_expected_change); 534 SkipUntil(tok::r_paren); 535 return; 536 } 537 IdentifierInfo *Keyword = Tok.getIdentifierInfo(); 538 SourceLocation KeywordLoc = ConsumeToken(); 539 540 if (Keyword == Ident_unavailable) { 541 if (UnavailableLoc.isValid()) { 542 Diag(KeywordLoc, diag::err_availability_redundant) 543 << Keyword << SourceRange(UnavailableLoc); 544 } 545 UnavailableLoc = KeywordLoc; 546 547 if (Tok.isNot(tok::comma)) 548 break; 549 550 ConsumeToken(); 551 continue; 552 } 553 554 if (Tok.isNot(tok::equal)) { 555 Diag(Tok, diag::err_expected_equal_after) 556 << Keyword; 557 SkipUntil(tok::r_paren); 558 return; 559 } 560 ConsumeToken(); 561 562 SourceRange VersionRange; 563 VersionTuple Version = ParseVersionTuple(VersionRange); 564 565 if (Version.empty()) { 566 SkipUntil(tok::r_paren); 567 return; 568 } 569 570 unsigned Index; 571 if (Keyword == Ident_introduced) 572 Index = Introduced; 573 else if (Keyword == Ident_deprecated) 574 Index = Deprecated; 575 else if (Keyword == Ident_obsoleted) 576 Index = Obsoleted; 577 else 578 Index = Unknown; 579 580 if (Index < Unknown) { 581 if (!Changes[Index].KeywordLoc.isInvalid()) { 582 Diag(KeywordLoc, diag::err_availability_redundant) 583 << Keyword 584 << SourceRange(Changes[Index].KeywordLoc, 585 Changes[Index].VersionRange.getEnd()); 586 } 587 588 Changes[Index].KeywordLoc = KeywordLoc; 589 Changes[Index].Version = Version; 590 Changes[Index].VersionRange = VersionRange; 591 } else { 592 Diag(KeywordLoc, diag::err_availability_unknown_change) 593 << Keyword << VersionRange; 594 } 595 596 if (Tok.isNot(tok::comma)) 597 break; 598 599 ConsumeToken(); 600 } while (true); 601 602 // Closing ')'. 603 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 604 if (RParenLoc.isInvalid()) 605 return; 606 607 if (endLoc) 608 *endLoc = RParenLoc; 609 610 // The 'unavailable' availability cannot be combined with any other 611 // availability changes. Make sure that hasn't happened. 612 if (UnavailableLoc.isValid()) { 613 bool Complained = false; 614 for (unsigned Index = Introduced; Index != Unknown; ++Index) { 615 if (Changes[Index].KeywordLoc.isValid()) { 616 if (!Complained) { 617 Diag(UnavailableLoc, diag::warn_availability_and_unavailable) 618 << SourceRange(Changes[Index].KeywordLoc, 619 Changes[Index].VersionRange.getEnd()); 620 Complained = true; 621 } 622 623 // Clear out the availability. 624 Changes[Index] = AvailabilityChange(); 625 } 626 } 627 } 628 629 // Record this attribute 630 attrs.addNew(&Availability, AvailabilityLoc, 631 0, SourceLocation(), 632 Platform, PlatformLoc, 633 Changes[Introduced], 634 Changes[Deprecated], 635 Changes[Obsoleted], 636 UnavailableLoc, false, false); 637} 638 639void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) { 640 Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed) 641 << attrs.Range; 642} 643 644/// ParseDeclaration - Parse a full 'declaration', which consists of 645/// declaration-specifiers, some number of declarators, and a semicolon. 646/// 'Context' should be a Declarator::TheContext value. This returns the 647/// location of the semicolon in DeclEnd. 648/// 649/// declaration: [C99 6.7] 650/// block-declaration -> 651/// simple-declaration 652/// others [FIXME] 653/// [C++] template-declaration 654/// [C++] namespace-definition 655/// [C++] using-directive 656/// [C++] using-declaration 657/// [C++0x/C1X] static_assert-declaration 658/// others... [FIXME] 659/// 660Parser::DeclGroupPtrTy Parser::ParseDeclaration(StmtVector &Stmts, 661 unsigned Context, 662 SourceLocation &DeclEnd, 663 ParsedAttributesWithRange &attrs) { 664 ParenBraceBracketBalancer BalancerRAIIObj(*this); 665 666 Decl *SingleDecl = 0; 667 switch (Tok.getKind()) { 668 case tok::kw_template: 669 case tok::kw_export: 670 ProhibitAttributes(attrs); 671 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd); 672 break; 673 case tok::kw_inline: 674 // Could be the start of an inline namespace. Allowed as an ext in C++03. 675 if (getLang().CPlusPlus && NextToken().is(tok::kw_namespace)) { 676 ProhibitAttributes(attrs); 677 SourceLocation InlineLoc = ConsumeToken(); 678 SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc); 679 break; 680 } 681 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs, 682 true); 683 case tok::kw_namespace: 684 ProhibitAttributes(attrs); 685 SingleDecl = ParseNamespace(Context, DeclEnd); 686 break; 687 case tok::kw_using: 688 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(), 689 DeclEnd, attrs); 690 break; 691 case tok::kw_static_assert: 692 case tok::kw__Static_assert: 693 ProhibitAttributes(attrs); 694 SingleDecl = ParseStaticAssertDeclaration(DeclEnd); 695 break; 696 default: 697 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs, true); 698 } 699 700 // This routine returns a DeclGroup, if the thing we parsed only contains a 701 // single decl, convert it now. 702 return Actions.ConvertDeclToDeclGroup(SingleDecl); 703} 704 705/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl] 706/// declaration-specifiers init-declarator-list[opt] ';' 707///[C90/C++]init-declarator-list ';' [TODO] 708/// [OMP] threadprivate-directive [TODO] 709/// 710/// for-range-declaration: [C++0x 6.5p1: stmt.ranged] 711/// attribute-specifier-seq[opt] type-specifier-seq declarator 712/// 713/// If RequireSemi is false, this does not check for a ';' at the end of the 714/// declaration. If it is true, it checks for and eats it. 715/// 716/// If FRI is non-null, we might be parsing a for-range-declaration instead 717/// of a simple-declaration. If we find that we are, we also parse the 718/// for-range-initializer, and place it here. 719Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(StmtVector &Stmts, 720 unsigned Context, 721 SourceLocation &DeclEnd, 722 ParsedAttributes &attrs, 723 bool RequireSemi, 724 ForRangeInit *FRI) { 725 // Parse the common declaration-specifiers piece. 726 ParsingDeclSpec DS(*this); 727 DS.takeAttributesFrom(attrs); 728 729 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, 730 getDeclSpecContextFromDeclaratorContext(Context)); 731 StmtResult R = Actions.ActOnVlaStmt(DS); 732 if (R.isUsable()) 733 Stmts.push_back(R.release()); 734 735 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 736 // declaration-specifiers init-declarator-list[opt] ';' 737 if (Tok.is(tok::semi)) { 738 if (RequireSemi) ConsumeToken(); 739 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, 740 DS); 741 DS.complete(TheDecl); 742 return Actions.ConvertDeclToDeclGroup(TheDecl); 743 } 744 745 return ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, &DeclEnd, FRI); 746} 747 748/// ParseDeclGroup - Having concluded that this is either a function 749/// definition or a group of object declarations, actually parse the 750/// result. 751Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS, 752 unsigned Context, 753 bool AllowFunctionDefinitions, 754 SourceLocation *DeclEnd, 755 ForRangeInit *FRI) { 756 // Parse the first declarator. 757 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context)); 758 ParseDeclarator(D); 759 760 // Bail out if the first declarator didn't seem well-formed. 761 if (!D.hasName() && !D.mayOmitIdentifier()) { 762 // Skip until ; or }. 763 SkipUntil(tok::r_brace, true, true); 764 if (Tok.is(tok::semi)) 765 ConsumeToken(); 766 return DeclGroupPtrTy(); 767 } 768 769 // Check to see if we have a function *definition* which must have a body. 770 if (AllowFunctionDefinitions && D.isFunctionDeclarator() && 771 // Look at the next token to make sure that this isn't a function 772 // declaration. We have to check this because __attribute__ might be the 773 // start of a function definition in GCC-extended K&R C. 774 !isDeclarationAfterDeclarator()) { 775 776 if (isStartOfFunctionDefinition(D)) { 777 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 778 Diag(Tok, diag::err_function_declared_typedef); 779 780 // Recover by treating the 'typedef' as spurious. 781 DS.ClearStorageClassSpecs(); 782 } 783 784 Decl *TheDecl = ParseFunctionDefinition(D); 785 return Actions.ConvertDeclToDeclGroup(TheDecl); 786 } 787 788 if (isDeclarationSpecifier()) { 789 // If there is an invalid declaration specifier right after the function 790 // prototype, then we must be in a missing semicolon case where this isn't 791 // actually a body. Just fall through into the code that handles it as a 792 // prototype, and let the top-level code handle the erroneous declspec 793 // where it would otherwise expect a comma or semicolon. 794 } else { 795 Diag(Tok, diag::err_expected_fn_body); 796 SkipUntil(tok::semi); 797 return DeclGroupPtrTy(); 798 } 799 } 800 801 if (ParseAttributesAfterDeclarator(D)) 802 return DeclGroupPtrTy(); 803 804 // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we 805 // must parse and analyze the for-range-initializer before the declaration is 806 // analyzed. 807 if (FRI && Tok.is(tok::colon)) { 808 FRI->ColonLoc = ConsumeToken(); 809 // FIXME: handle braced-init-list here. 810 FRI->RangeExpr = ParseExpression(); 811 Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D); 812 Actions.ActOnCXXForRangeDecl(ThisDecl); 813 Actions.FinalizeDeclaration(ThisDecl); 814 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, &ThisDecl, 1); 815 } 816 817 llvm::SmallVector<Decl *, 8> DeclsInGroup; 818 Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(D); 819 D.complete(FirstDecl); 820 if (FirstDecl) 821 DeclsInGroup.push_back(FirstDecl); 822 823 // If we don't have a comma, it is either the end of the list (a ';') or an 824 // error, bail out. 825 while (Tok.is(tok::comma)) { 826 // Consume the comma. 827 ConsumeToken(); 828 829 // Parse the next declarator. 830 D.clear(); 831 832 // Accept attributes in an init-declarator. In the first declarator in a 833 // declaration, these would be part of the declspec. In subsequent 834 // declarators, they become part of the declarator itself, so that they 835 // don't apply to declarators after *this* one. Examples: 836 // short __attribute__((common)) var; -> declspec 837 // short var __attribute__((common)); -> declarator 838 // short x, __attribute__((common)) var; -> declarator 839 MaybeParseGNUAttributes(D); 840 841 ParseDeclarator(D); 842 843 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D); 844 D.complete(ThisDecl); 845 if (ThisDecl) 846 DeclsInGroup.push_back(ThisDecl); 847 } 848 849 if (DeclEnd) 850 *DeclEnd = Tok.getLocation(); 851 852 if (Context != Declarator::ForContext && 853 ExpectAndConsume(tok::semi, 854 Context == Declarator::FileContext 855 ? diag::err_invalid_token_after_toplevel_declarator 856 : diag::err_expected_semi_declaration)) { 857 // Okay, there was no semicolon and one was expected. If we see a 858 // declaration specifier, just assume it was missing and continue parsing. 859 // Otherwise things are very confused and we skip to recover. 860 if (!isDeclarationSpecifier()) { 861 SkipUntil(tok::r_brace, true, true); 862 if (Tok.is(tok::semi)) 863 ConsumeToken(); 864 } 865 } 866 867 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, 868 DeclsInGroup.data(), 869 DeclsInGroup.size()); 870} 871 872/// Parse an optional simple-asm-expr and attributes, and attach them to a 873/// declarator. Returns true on an error. 874bool Parser::ParseAttributesAfterDeclarator(Declarator &D) { 875 // If a simple-asm-expr is present, parse it. 876 if (Tok.is(tok::kw_asm)) { 877 SourceLocation Loc; 878 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 879 if (AsmLabel.isInvalid()) { 880 SkipUntil(tok::semi, true, true); 881 return true; 882 } 883 884 D.setAsmLabel(AsmLabel.release()); 885 D.SetRangeEnd(Loc); 886 } 887 888 MaybeParseGNUAttributes(D); 889 return false; 890} 891 892/// \brief Parse 'declaration' after parsing 'declaration-specifiers 893/// declarator'. This method parses the remainder of the declaration 894/// (including any attributes or initializer, among other things) and 895/// finalizes the declaration. 896/// 897/// init-declarator: [C99 6.7] 898/// declarator 899/// declarator '=' initializer 900/// [GNU] declarator simple-asm-expr[opt] attributes[opt] 901/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer 902/// [C++] declarator initializer[opt] 903/// 904/// [C++] initializer: 905/// [C++] '=' initializer-clause 906/// [C++] '(' expression-list ')' 907/// [C++0x] '=' 'default' [TODO] 908/// [C++0x] '=' 'delete' 909/// 910/// According to the standard grammar, =default and =delete are function 911/// definitions, but that definitely doesn't fit with the parser here. 912/// 913Decl *Parser::ParseDeclarationAfterDeclarator(Declarator &D, 914 const ParsedTemplateInfo &TemplateInfo) { 915 if (ParseAttributesAfterDeclarator(D)) 916 return 0; 917 918 return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo); 919} 920 921Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(Declarator &D, 922 const ParsedTemplateInfo &TemplateInfo) { 923 // Inform the current actions module that we just parsed this declarator. 924 Decl *ThisDecl = 0; 925 switch (TemplateInfo.Kind) { 926 case ParsedTemplateInfo::NonTemplate: 927 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D); 928 break; 929 930 case ParsedTemplateInfo::Template: 931 case ParsedTemplateInfo::ExplicitSpecialization: 932 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(), 933 MultiTemplateParamsArg(Actions, 934 TemplateInfo.TemplateParams->data(), 935 TemplateInfo.TemplateParams->size()), 936 D); 937 break; 938 939 case ParsedTemplateInfo::ExplicitInstantiation: { 940 DeclResult ThisRes 941 = Actions.ActOnExplicitInstantiation(getCurScope(), 942 TemplateInfo.ExternLoc, 943 TemplateInfo.TemplateLoc, 944 D); 945 if (ThisRes.isInvalid()) { 946 SkipUntil(tok::semi, true, true); 947 return 0; 948 } 949 950 ThisDecl = ThisRes.get(); 951 break; 952 } 953 } 954 955 bool TypeContainsAuto = 956 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; 957 958 // Parse declarator '=' initializer. 959 if (isTokenEqualOrMistypedEqualEqual( 960 diag::err_invalid_equalequal_after_declarator)) { 961 ConsumeToken(); 962 if (Tok.is(tok::kw_delete)) { 963 SourceLocation DelLoc = ConsumeToken(); 964 965 if (!getLang().CPlusPlus0x) 966 Diag(DelLoc, diag::warn_deleted_function_accepted_as_extension); 967 968 Actions.SetDeclDeleted(ThisDecl, DelLoc); 969 } else { 970 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 971 EnterScope(0); 972 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl); 973 } 974 975 if (Tok.is(tok::code_completion)) { 976 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl); 977 ConsumeCodeCompletionToken(); 978 SkipUntil(tok::comma, true, true); 979 return ThisDecl; 980 } 981 982 ExprResult Init(ParseInitializer()); 983 984 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 985 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 986 ExitScope(); 987 } 988 989 if (Init.isInvalid()) { 990 SkipUntil(tok::comma, true, true); 991 Actions.ActOnInitializerError(ThisDecl); 992 } else 993 Actions.AddInitializerToDecl(ThisDecl, Init.take(), 994 /*DirectInit=*/false, TypeContainsAuto); 995 } 996 } else if (Tok.is(tok::l_paren)) { 997 // Parse C++ direct initializer: '(' expression-list ')' 998 SourceLocation LParenLoc = ConsumeParen(); 999 ExprVector Exprs(Actions); 1000 CommaLocsTy CommaLocs; 1001 1002 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 1003 EnterScope(0); 1004 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl); 1005 } 1006 1007 if (ParseExpressionList(Exprs, CommaLocs)) { 1008 SkipUntil(tok::r_paren); 1009 1010 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 1011 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 1012 ExitScope(); 1013 } 1014 } else { 1015 // Match the ')'. 1016 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1017 1018 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() && 1019 "Unexpected number of commas!"); 1020 1021 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 1022 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 1023 ExitScope(); 1024 } 1025 1026 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc, 1027 move_arg(Exprs), 1028 RParenLoc, 1029 TypeContainsAuto); 1030 } 1031 } else { 1032 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto); 1033 } 1034 1035 Actions.FinalizeDeclaration(ThisDecl); 1036 1037 return ThisDecl; 1038} 1039 1040/// ParseSpecifierQualifierList 1041/// specifier-qualifier-list: 1042/// type-specifier specifier-qualifier-list[opt] 1043/// type-qualifier specifier-qualifier-list[opt] 1044/// [GNU] attributes specifier-qualifier-list[opt] 1045/// 1046void Parser::ParseSpecifierQualifierList(DeclSpec &DS) { 1047 /// specifier-qualifier-list is a subset of declaration-specifiers. Just 1048 /// parse declaration-specifiers and complain about extra stuff. 1049 ParseDeclarationSpecifiers(DS); 1050 1051 // Validate declspec for type-name. 1052 unsigned Specs = DS.getParsedSpecifiers(); 1053 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() && 1054 !DS.hasAttributes()) 1055 Diag(Tok, diag::err_typename_requires_specqual); 1056 1057 // Issue diagnostic and remove storage class if present. 1058 if (Specs & DeclSpec::PQ_StorageClassSpecifier) { 1059 if (DS.getStorageClassSpecLoc().isValid()) 1060 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass); 1061 else 1062 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass); 1063 DS.ClearStorageClassSpecs(); 1064 } 1065 1066 // Issue diagnostic and remove function specfier if present. 1067 if (Specs & DeclSpec::PQ_FunctionSpecifier) { 1068 if (DS.isInlineSpecified()) 1069 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec); 1070 if (DS.isVirtualSpecified()) 1071 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec); 1072 if (DS.isExplicitSpecified()) 1073 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec); 1074 DS.ClearFunctionSpecs(); 1075 } 1076} 1077 1078/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the 1079/// specified token is valid after the identifier in a declarator which 1080/// immediately follows the declspec. For example, these things are valid: 1081/// 1082/// int x [ 4]; // direct-declarator 1083/// int x ( int y); // direct-declarator 1084/// int(int x ) // direct-declarator 1085/// int x ; // simple-declaration 1086/// int x = 17; // init-declarator-list 1087/// int x , y; // init-declarator-list 1088/// int x __asm__ ("foo"); // init-declarator-list 1089/// int x : 4; // struct-declarator 1090/// int x { 5}; // C++'0x unified initializers 1091/// 1092/// This is not, because 'x' does not immediately follow the declspec (though 1093/// ')' happens to be valid anyway). 1094/// int (x) 1095/// 1096static bool isValidAfterIdentifierInDeclarator(const Token &T) { 1097 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) || 1098 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) || 1099 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon); 1100} 1101 1102 1103/// ParseImplicitInt - This method is called when we have an non-typename 1104/// identifier in a declspec (which normally terminates the decl spec) when 1105/// the declspec has no type specifier. In this case, the declspec is either 1106/// malformed or is "implicit int" (in K&R and C89). 1107/// 1108/// This method handles diagnosing this prettily and returns false if the 1109/// declspec is done being processed. If it recovers and thinks there may be 1110/// other pieces of declspec after it, it returns true. 1111/// 1112bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, 1113 const ParsedTemplateInfo &TemplateInfo, 1114 AccessSpecifier AS) { 1115 assert(Tok.is(tok::identifier) && "should have identifier"); 1116 1117 SourceLocation Loc = Tok.getLocation(); 1118 // If we see an identifier that is not a type name, we normally would 1119 // parse it as the identifer being declared. However, when a typename 1120 // is typo'd or the definition is not included, this will incorrectly 1121 // parse the typename as the identifier name and fall over misparsing 1122 // later parts of the diagnostic. 1123 // 1124 // As such, we try to do some look-ahead in cases where this would 1125 // otherwise be an "implicit-int" case to see if this is invalid. For 1126 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as 1127 // an identifier with implicit int, we'd get a parse error because the 1128 // next token is obviously invalid for a type. Parse these as a case 1129 // with an invalid type specifier. 1130 assert(!DS.hasTypeSpecifier() && "Type specifier checked above"); 1131 1132 // Since we know that this either implicit int (which is rare) or an 1133 // error, we'd do lookahead to try to do better recovery. 1134 if (isValidAfterIdentifierInDeclarator(NextToken())) { 1135 // If this token is valid for implicit int, e.g. "static x = 4", then 1136 // we just avoid eating the identifier, so it will be parsed as the 1137 // identifier in the declarator. 1138 return false; 1139 } 1140 1141 // Otherwise, if we don't consume this token, we are going to emit an 1142 // error anyway. Try to recover from various common problems. Check 1143 // to see if this was a reference to a tag name without a tag specified. 1144 // This is a common problem in C (saying 'foo' instead of 'struct foo'). 1145 // 1146 // C++ doesn't need this, and isTagName doesn't take SS. 1147 if (SS == 0) { 1148 const char *TagName = 0, *FixitTagName = 0; 1149 tok::TokenKind TagKind = tok::unknown; 1150 1151 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) { 1152 default: break; 1153 case DeclSpec::TST_enum: 1154 TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break; 1155 case DeclSpec::TST_union: 1156 TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break; 1157 case DeclSpec::TST_struct: 1158 TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break; 1159 case DeclSpec::TST_class: 1160 TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break; 1161 } 1162 1163 if (TagName) { 1164 Diag(Loc, diag::err_use_of_tag_name_without_tag) 1165 << Tok.getIdentifierInfo() << TagName << getLang().CPlusPlus 1166 << FixItHint::CreateInsertion(Tok.getLocation(),FixitTagName); 1167 1168 // Parse this as a tag as if the missing tag were present. 1169 if (TagKind == tok::kw_enum) 1170 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 1171 else 1172 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS); 1173 return true; 1174 } 1175 } 1176 1177 // This is almost certainly an invalid type name. Let the action emit a 1178 // diagnostic and attempt to recover. 1179 ParsedType T; 1180 if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc, 1181 getCurScope(), SS, T)) { 1182 // The action emitted a diagnostic, so we don't have to. 1183 if (T) { 1184 // The action has suggested that the type T could be used. Set that as 1185 // the type in the declaration specifiers, consume the would-be type 1186 // name token, and we're done. 1187 const char *PrevSpec; 1188 unsigned DiagID; 1189 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T); 1190 DS.SetRangeEnd(Tok.getLocation()); 1191 ConsumeToken(); 1192 1193 // There may be other declaration specifiers after this. 1194 return true; 1195 } 1196 1197 // Fall through; the action had no suggestion for us. 1198 } else { 1199 // The action did not emit a diagnostic, so emit one now. 1200 SourceRange R; 1201 if (SS) R = SS->getRange(); 1202 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R; 1203 } 1204 1205 // Mark this as an error. 1206 const char *PrevSpec; 1207 unsigned DiagID; 1208 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID); 1209 DS.SetRangeEnd(Tok.getLocation()); 1210 ConsumeToken(); 1211 1212 // TODO: Could inject an invalid typedef decl in an enclosing scope to 1213 // avoid rippling error messages on subsequent uses of the same type, 1214 // could be useful if #include was forgotten. 1215 return false; 1216} 1217 1218/// \brief Determine the declaration specifier context from the declarator 1219/// context. 1220/// 1221/// \param Context the declarator context, which is one of the 1222/// Declarator::TheContext enumerator values. 1223Parser::DeclSpecContext 1224Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) { 1225 if (Context == Declarator::MemberContext) 1226 return DSC_class; 1227 if (Context == Declarator::FileContext) 1228 return DSC_top_level; 1229 return DSC_normal; 1230} 1231 1232/// ParseDeclarationSpecifiers 1233/// declaration-specifiers: [C99 6.7] 1234/// storage-class-specifier declaration-specifiers[opt] 1235/// type-specifier declaration-specifiers[opt] 1236/// [C99] function-specifier declaration-specifiers[opt] 1237/// [GNU] attributes declaration-specifiers[opt] 1238/// 1239/// storage-class-specifier: [C99 6.7.1] 1240/// 'typedef' 1241/// 'extern' 1242/// 'static' 1243/// 'auto' 1244/// 'register' 1245/// [C++] 'mutable' 1246/// [GNU] '__thread' 1247/// function-specifier: [C99 6.7.4] 1248/// [C99] 'inline' 1249/// [C++] 'virtual' 1250/// [C++] 'explicit' 1251/// [OpenCL] '__kernel' 1252/// 'friend': [C++ dcl.friend] 1253/// 'constexpr': [C++0x dcl.constexpr] 1254 1255/// 1256void Parser::ParseDeclarationSpecifiers(DeclSpec &DS, 1257 const ParsedTemplateInfo &TemplateInfo, 1258 AccessSpecifier AS, 1259 DeclSpecContext DSContext) { 1260 if (DS.getSourceRange().isInvalid()) { 1261 DS.SetRangeStart(Tok.getLocation()); 1262 DS.SetRangeEnd(Tok.getLocation()); 1263 } 1264 1265 while (1) { 1266 bool isInvalid = false; 1267 const char *PrevSpec = 0; 1268 unsigned DiagID = 0; 1269 1270 SourceLocation Loc = Tok.getLocation(); 1271 1272 switch (Tok.getKind()) { 1273 default: 1274 DoneWithDeclSpec: 1275 // If this is not a declaration specifier token, we're done reading decl 1276 // specifiers. First verify that DeclSpec's are consistent. 1277 DS.Finish(Diags, PP); 1278 return; 1279 1280 case tok::code_completion: { 1281 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace; 1282 if (DS.hasTypeSpecifier()) { 1283 bool AllowNonIdentifiers 1284 = (getCurScope()->getFlags() & (Scope::ControlScope | 1285 Scope::BlockScope | 1286 Scope::TemplateParamScope | 1287 Scope::FunctionPrototypeScope | 1288 Scope::AtCatchScope)) == 0; 1289 bool AllowNestedNameSpecifiers 1290 = DSContext == DSC_top_level || 1291 (DSContext == DSC_class && DS.isFriendSpecified()); 1292 1293 Actions.CodeCompleteDeclSpec(getCurScope(), DS, 1294 AllowNonIdentifiers, 1295 AllowNestedNameSpecifiers); 1296 ConsumeCodeCompletionToken(); 1297 return; 1298 } 1299 1300 if (getCurScope()->getFnParent() || getCurScope()->getBlockParent()) 1301 CCC = Sema::PCC_LocalDeclarationSpecifiers; 1302 else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) 1303 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate 1304 : Sema::PCC_Template; 1305 else if (DSContext == DSC_class) 1306 CCC = Sema::PCC_Class; 1307 else if (ObjCImpDecl) 1308 CCC = Sema::PCC_ObjCImplementation; 1309 1310 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC); 1311 ConsumeCodeCompletionToken(); 1312 return; 1313 } 1314 1315 case tok::coloncolon: // ::foo::bar 1316 // C++ scope specifier. Annotate and loop, or bail out on error. 1317 if (TryAnnotateCXXScopeToken(true)) { 1318 if (!DS.hasTypeSpecifier()) 1319 DS.SetTypeSpecError(); 1320 goto DoneWithDeclSpec; 1321 } 1322 if (Tok.is(tok::coloncolon)) // ::new or ::delete 1323 goto DoneWithDeclSpec; 1324 continue; 1325 1326 case tok::annot_cxxscope: { 1327 if (DS.hasTypeSpecifier()) 1328 goto DoneWithDeclSpec; 1329 1330 CXXScopeSpec SS; 1331 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(), 1332 Tok.getAnnotationRange(), 1333 SS); 1334 1335 // We are looking for a qualified typename. 1336 Token Next = NextToken(); 1337 if (Next.is(tok::annot_template_id) && 1338 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 1339 ->Kind == TNK_Type_template) { 1340 // We have a qualified template-id, e.g., N::A<int> 1341 1342 // C++ [class.qual]p2: 1343 // In a lookup in which the constructor is an acceptable lookup 1344 // result and the nested-name-specifier nominates a class C: 1345 // 1346 // - if the name specified after the 1347 // nested-name-specifier, when looked up in C, is the 1348 // injected-class-name of C (Clause 9), or 1349 // 1350 // - if the name specified after the nested-name-specifier 1351 // is the same as the identifier or the 1352 // simple-template-id's template-name in the last 1353 // component of the nested-name-specifier, 1354 // 1355 // the name is instead considered to name the constructor of 1356 // class C. 1357 // 1358 // Thus, if the template-name is actually the constructor 1359 // name, then the code is ill-formed; this interpretation is 1360 // reinforced by the NAD status of core issue 635. 1361 TemplateIdAnnotation *TemplateId 1362 = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); 1363 if ((DSContext == DSC_top_level || 1364 (DSContext == DSC_class && DS.isFriendSpecified())) && 1365 TemplateId->Name && 1366 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) { 1367 if (isConstructorDeclarator()) { 1368 // The user meant this to be an out-of-line constructor 1369 // definition, but template arguments are not allowed 1370 // there. Just allow this as a constructor; we'll 1371 // complain about it later. 1372 goto DoneWithDeclSpec; 1373 } 1374 1375 // The user meant this to name a type, but it actually names 1376 // a constructor with some extraneous template 1377 // arguments. Complain, then parse it as a type as the user 1378 // intended. 1379 Diag(TemplateId->TemplateNameLoc, 1380 diag::err_out_of_line_template_id_names_constructor) 1381 << TemplateId->Name; 1382 } 1383 1384 DS.getTypeSpecScope() = SS; 1385 ConsumeToken(); // The C++ scope. 1386 assert(Tok.is(tok::annot_template_id) && 1387 "ParseOptionalCXXScopeSpecifier not working"); 1388 AnnotateTemplateIdTokenAsType(); 1389 continue; 1390 } 1391 1392 if (Next.is(tok::annot_typename)) { 1393 DS.getTypeSpecScope() = SS; 1394 ConsumeToken(); // The C++ scope. 1395 if (Tok.getAnnotationValue()) { 1396 ParsedType T = getTypeAnnotation(Tok); 1397 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, 1398 Tok.getAnnotationEndLoc(), 1399 PrevSpec, DiagID, T); 1400 } 1401 else 1402 DS.SetTypeSpecError(); 1403 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1404 ConsumeToken(); // The typename 1405 } 1406 1407 if (Next.isNot(tok::identifier)) 1408 goto DoneWithDeclSpec; 1409 1410 // If we're in a context where the identifier could be a class name, 1411 // check whether this is a constructor declaration. 1412 if ((DSContext == DSC_top_level || 1413 (DSContext == DSC_class && DS.isFriendSpecified())) && 1414 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(), 1415 &SS)) { 1416 if (isConstructorDeclarator()) 1417 goto DoneWithDeclSpec; 1418 1419 // As noted in C++ [class.qual]p2 (cited above), when the name 1420 // of the class is qualified in a context where it could name 1421 // a constructor, its a constructor name. However, we've 1422 // looked at the declarator, and the user probably meant this 1423 // to be a type. Complain that it isn't supposed to be treated 1424 // as a type, then proceed to parse it as a type. 1425 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor) 1426 << Next.getIdentifierInfo(); 1427 } 1428 1429 ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 1430 Next.getLocation(), 1431 getCurScope(), &SS, 1432 false, false, ParsedType(), 1433 /*NonTrivialSourceInfo=*/true); 1434 1435 // If the referenced identifier is not a type, then this declspec is 1436 // erroneous: We already checked about that it has no type specifier, and 1437 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 1438 // typename. 1439 if (TypeRep == 0) { 1440 ConsumeToken(); // Eat the scope spec so the identifier is current. 1441 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 1442 goto DoneWithDeclSpec; 1443 } 1444 1445 DS.getTypeSpecScope() = SS; 1446 ConsumeToken(); // The C++ scope. 1447 1448 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1449 DiagID, TypeRep); 1450 if (isInvalid) 1451 break; 1452 1453 DS.SetRangeEnd(Tok.getLocation()); 1454 ConsumeToken(); // The typename. 1455 1456 continue; 1457 } 1458 1459 case tok::annot_typename: { 1460 if (Tok.getAnnotationValue()) { 1461 ParsedType T = getTypeAnnotation(Tok); 1462 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1463 DiagID, T); 1464 } else 1465 DS.SetTypeSpecError(); 1466 1467 if (isInvalid) 1468 break; 1469 1470 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1471 ConsumeToken(); // The typename 1472 1473 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1474 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1475 // Objective-C interface. 1476 if (Tok.is(tok::less) && getLang().ObjC1) 1477 ParseObjCProtocolQualifiers(DS); 1478 1479 continue; 1480 } 1481 1482 case tok::kw___is_signed: 1483 // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang 1484 // typically treats it as a trait. If we see __is_signed as it appears 1485 // in libstdc++, e.g., 1486 // 1487 // static const bool __is_signed; 1488 // 1489 // then treat __is_signed as an identifier rather than as a keyword. 1490 if (DS.getTypeSpecType() == TST_bool && 1491 DS.getTypeQualifiers() == DeclSpec::TQ_const && 1492 DS.getStorageClassSpec() == DeclSpec::SCS_static) { 1493 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); 1494 Tok.setKind(tok::identifier); 1495 } 1496 1497 // We're done with the declaration-specifiers. 1498 goto DoneWithDeclSpec; 1499 1500 // typedef-name 1501 case tok::identifier: { 1502 // In C++, check to see if this is a scope specifier like foo::bar::, if 1503 // so handle it as such. This is important for ctor parsing. 1504 if (getLang().CPlusPlus) { 1505 if (TryAnnotateCXXScopeToken(true)) { 1506 if (!DS.hasTypeSpecifier()) 1507 DS.SetTypeSpecError(); 1508 goto DoneWithDeclSpec; 1509 } 1510 if (!Tok.is(tok::identifier)) 1511 continue; 1512 } 1513 1514 // This identifier can only be a typedef name if we haven't already seen 1515 // a type-specifier. Without this check we misparse: 1516 // typedef int X; struct Y { short X; }; as 'short int'. 1517 if (DS.hasTypeSpecifier()) 1518 goto DoneWithDeclSpec; 1519 1520 // Check for need to substitute AltiVec keyword tokens. 1521 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1522 break; 1523 1524 // It has to be available as a typedef too! 1525 ParsedType TypeRep = 1526 Actions.getTypeName(*Tok.getIdentifierInfo(), 1527 Tok.getLocation(), getCurScope()); 1528 1529 // If this is not a typedef name, don't parse it as part of the declspec, 1530 // it must be an implicit int or an error. 1531 if (!TypeRep) { 1532 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 1533 goto DoneWithDeclSpec; 1534 } 1535 1536 // If we're in a context where the identifier could be a class name, 1537 // check whether this is a constructor declaration. 1538 if (getLang().CPlusPlus && DSContext == DSC_class && 1539 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) && 1540 isConstructorDeclarator()) 1541 goto DoneWithDeclSpec; 1542 1543 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1544 DiagID, TypeRep); 1545 if (isInvalid) 1546 break; 1547 1548 DS.SetRangeEnd(Tok.getLocation()); 1549 ConsumeToken(); // The identifier 1550 1551 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1552 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1553 // Objective-C interface. 1554 if (Tok.is(tok::less) && getLang().ObjC1) 1555 ParseObjCProtocolQualifiers(DS); 1556 1557 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1558 // If a type specifier follows, it will be diagnosed elsewhere. 1559 continue; 1560 } 1561 1562 // type-name 1563 case tok::annot_template_id: { 1564 TemplateIdAnnotation *TemplateId 1565 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1566 if (TemplateId->Kind != TNK_Type_template) { 1567 // This template-id does not refer to a type name, so we're 1568 // done with the type-specifiers. 1569 goto DoneWithDeclSpec; 1570 } 1571 1572 // If we're in a context where the template-id could be a 1573 // constructor name or specialization, check whether this is a 1574 // constructor declaration. 1575 if (getLang().CPlusPlus && DSContext == DSC_class && 1576 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) && 1577 isConstructorDeclarator()) 1578 goto DoneWithDeclSpec; 1579 1580 // Turn the template-id annotation token into a type annotation 1581 // token, then try again to parse it as a type-specifier. 1582 AnnotateTemplateIdTokenAsType(); 1583 continue; 1584 } 1585 1586 // GNU attributes support. 1587 case tok::kw___attribute: 1588 ParseGNUAttributes(DS.getAttributes()); 1589 continue; 1590 1591 // Microsoft declspec support. 1592 case tok::kw___declspec: 1593 ParseMicrosoftDeclSpec(DS.getAttributes()); 1594 continue; 1595 1596 // Microsoft single token adornments. 1597 case tok::kw___forceinline: 1598 // FIXME: Add handling here! 1599 break; 1600 1601 case tok::kw___ptr64: 1602 case tok::kw___w64: 1603 case tok::kw___cdecl: 1604 case tok::kw___stdcall: 1605 case tok::kw___fastcall: 1606 case tok::kw___thiscall: 1607 ParseMicrosoftTypeAttributes(DS.getAttributes()); 1608 continue; 1609 1610 // Borland single token adornments. 1611 case tok::kw___pascal: 1612 ParseBorlandTypeAttributes(DS.getAttributes()); 1613 continue; 1614 1615 // OpenCL single token adornments. 1616 case tok::kw___kernel: 1617 ParseOpenCLAttributes(DS.getAttributes()); 1618 continue; 1619 1620 // storage-class-specifier 1621 case tok::kw_typedef: 1622 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 1623 DiagID, getLang()); 1624 break; 1625 case tok::kw_extern: 1626 if (DS.isThreadSpecified()) 1627 Diag(Tok, diag::ext_thread_before) << "extern"; 1628 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 1629 DiagID, getLang()); 1630 break; 1631 case tok::kw___private_extern__: 1632 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 1633 PrevSpec, DiagID, getLang()); 1634 break; 1635 case tok::kw_static: 1636 if (DS.isThreadSpecified()) 1637 Diag(Tok, diag::ext_thread_before) << "static"; 1638 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 1639 DiagID, getLang()); 1640 break; 1641 case tok::kw_auto: 1642 if (getLang().CPlusPlus0x) { 1643 if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) { 1644 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1645 DiagID, getLang()); 1646 if (!isInvalid) 1647 Diag(Tok, diag::auto_storage_class) 1648 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); 1649 } 1650 else 1651 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 1652 DiagID); 1653 } 1654 else 1655 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1656 DiagID, getLang()); 1657 break; 1658 case tok::kw_register: 1659 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 1660 DiagID, getLang()); 1661 break; 1662 case tok::kw_mutable: 1663 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 1664 DiagID, getLang()); 1665 break; 1666 case tok::kw___thread: 1667 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 1668 break; 1669 1670 // function-specifier 1671 case tok::kw_inline: 1672 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 1673 break; 1674 case tok::kw_virtual: 1675 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 1676 break; 1677 case tok::kw_explicit: 1678 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 1679 break; 1680 1681 // friend 1682 case tok::kw_friend: 1683 if (DSContext == DSC_class) 1684 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1685 else { 1686 PrevSpec = ""; // not actually used by the diagnostic 1687 DiagID = diag::err_friend_invalid_in_context; 1688 isInvalid = true; 1689 } 1690 break; 1691 1692 // constexpr 1693 case tok::kw_constexpr: 1694 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID); 1695 break; 1696 1697 // type-specifier 1698 case tok::kw_short: 1699 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1700 DiagID); 1701 break; 1702 case tok::kw_long: 1703 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1704 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1705 DiagID); 1706 else 1707 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1708 DiagID); 1709 break; 1710 case tok::kw___int64: 1711 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1712 DiagID); 1713 break; 1714 case tok::kw_signed: 1715 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1716 DiagID); 1717 break; 1718 case tok::kw_unsigned: 1719 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1720 DiagID); 1721 break; 1722 case tok::kw__Complex: 1723 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1724 DiagID); 1725 break; 1726 case tok::kw__Imaginary: 1727 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1728 DiagID); 1729 break; 1730 case tok::kw_void: 1731 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1732 DiagID); 1733 break; 1734 case tok::kw_char: 1735 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1736 DiagID); 1737 break; 1738 case tok::kw_int: 1739 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1740 DiagID); 1741 break; 1742 case tok::kw_float: 1743 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1744 DiagID); 1745 break; 1746 case tok::kw_double: 1747 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1748 DiagID); 1749 break; 1750 case tok::kw_wchar_t: 1751 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1752 DiagID); 1753 break; 1754 case tok::kw_char16_t: 1755 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1756 DiagID); 1757 break; 1758 case tok::kw_char32_t: 1759 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1760 DiagID); 1761 break; 1762 case tok::kw_bool: 1763 case tok::kw__Bool: 1764 if (Tok.is(tok::kw_bool) && 1765 DS.getTypeSpecType() != DeclSpec::TST_unspecified && 1766 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1767 PrevSpec = ""; // Not used by the diagnostic. 1768 DiagID = diag::err_bool_redeclaration; 1769 // For better error recovery. 1770 Tok.setKind(tok::identifier); 1771 isInvalid = true; 1772 } else { 1773 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1774 DiagID); 1775 } 1776 break; 1777 case tok::kw__Decimal32: 1778 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1779 DiagID); 1780 break; 1781 case tok::kw__Decimal64: 1782 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1783 DiagID); 1784 break; 1785 case tok::kw__Decimal128: 1786 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1787 DiagID); 1788 break; 1789 case tok::kw___vector: 1790 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1791 break; 1792 case tok::kw___pixel: 1793 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1794 break; 1795 case tok::kw___unknown_anytype: 1796 isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc, 1797 PrevSpec, DiagID); 1798 break; 1799 1800 // class-specifier: 1801 case tok::kw_class: 1802 case tok::kw_struct: 1803 case tok::kw_union: { 1804 tok::TokenKind Kind = Tok.getKind(); 1805 ConsumeToken(); 1806 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1807 continue; 1808 } 1809 1810 // enum-specifier: 1811 case tok::kw_enum: 1812 ConsumeToken(); 1813 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 1814 continue; 1815 1816 // cv-qualifier: 1817 case tok::kw_const: 1818 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1819 getLang()); 1820 break; 1821 case tok::kw_volatile: 1822 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1823 getLang()); 1824 break; 1825 case tok::kw_restrict: 1826 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1827 getLang()); 1828 break; 1829 1830 // C++ typename-specifier: 1831 case tok::kw_typename: 1832 if (TryAnnotateTypeOrScopeToken()) { 1833 DS.SetTypeSpecError(); 1834 goto DoneWithDeclSpec; 1835 } 1836 if (!Tok.is(tok::kw_typename)) 1837 continue; 1838 break; 1839 1840 // GNU typeof support. 1841 case tok::kw_typeof: 1842 ParseTypeofSpecifier(DS); 1843 continue; 1844 1845 case tok::kw_decltype: 1846 ParseDecltypeSpecifier(DS); 1847 continue; 1848 1849 // OpenCL qualifiers: 1850 case tok::kw_private: 1851 if (!getLang().OpenCL) 1852 goto DoneWithDeclSpec; 1853 case tok::kw___private: 1854 case tok::kw___global: 1855 case tok::kw___local: 1856 case tok::kw___constant: 1857 case tok::kw___read_only: 1858 case tok::kw___write_only: 1859 case tok::kw___read_write: 1860 ParseOpenCLQualifiers(DS); 1861 break; 1862 1863 case tok::less: 1864 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1865 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1866 // but we support it. 1867 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1868 goto DoneWithDeclSpec; 1869 1870 if (!ParseObjCProtocolQualifiers(DS)) 1871 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1872 << FixItHint::CreateInsertion(Loc, "id") 1873 << SourceRange(Loc, DS.getSourceRange().getEnd()); 1874 1875 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1876 // If a type specifier follows, it will be diagnosed elsewhere. 1877 continue; 1878 } 1879 // If the specifier wasn't legal, issue a diagnostic. 1880 if (isInvalid) { 1881 assert(PrevSpec && "Method did not return previous specifier!"); 1882 assert(DiagID); 1883 1884 if (DiagID == diag::ext_duplicate_declspec) 1885 Diag(Tok, DiagID) 1886 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation()); 1887 else 1888 Diag(Tok, DiagID) << PrevSpec; 1889 } 1890 1891 DS.SetRangeEnd(Tok.getLocation()); 1892 if (DiagID != diag::err_bool_redeclaration) 1893 ConsumeToken(); 1894 } 1895} 1896 1897/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1898/// primarily follow the C++ grammar with additions for C99 and GNU, 1899/// which together subsume the C grammar. Note that the C++ 1900/// type-specifier also includes the C type-qualifier (for const, 1901/// volatile, and C99 restrict). Returns true if a type-specifier was 1902/// found (and parsed), false otherwise. 1903/// 1904/// type-specifier: [C++ 7.1.5] 1905/// simple-type-specifier 1906/// class-specifier 1907/// enum-specifier 1908/// elaborated-type-specifier [TODO] 1909/// cv-qualifier 1910/// 1911/// cv-qualifier: [C++ 7.1.5.1] 1912/// 'const' 1913/// 'volatile' 1914/// [C99] 'restrict' 1915/// 1916/// simple-type-specifier: [ C++ 7.1.5.2] 1917/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1918/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1919/// 'char' 1920/// 'wchar_t' 1921/// 'bool' 1922/// 'short' 1923/// 'int' 1924/// 'long' 1925/// 'signed' 1926/// 'unsigned' 1927/// 'float' 1928/// 'double' 1929/// 'void' 1930/// [C99] '_Bool' 1931/// [C99] '_Complex' 1932/// [C99] '_Imaginary' // Removed in TC2? 1933/// [GNU] '_Decimal32' 1934/// [GNU] '_Decimal64' 1935/// [GNU] '_Decimal128' 1936/// [GNU] typeof-specifier 1937/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1938/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1939/// [C++0x] 'decltype' ( expression ) 1940/// [AltiVec] '__vector' 1941bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1942 const char *&PrevSpec, 1943 unsigned &DiagID, 1944 const ParsedTemplateInfo &TemplateInfo, 1945 bool SuppressDeclarations) { 1946 SourceLocation Loc = Tok.getLocation(); 1947 1948 switch (Tok.getKind()) { 1949 case tok::identifier: // foo::bar 1950 // If we already have a type specifier, this identifier is not a type. 1951 if (DS.getTypeSpecType() != DeclSpec::TST_unspecified || 1952 DS.getTypeSpecWidth() != DeclSpec::TSW_unspecified || 1953 DS.getTypeSpecSign() != DeclSpec::TSS_unspecified) 1954 return false; 1955 // Check for need to substitute AltiVec keyword tokens. 1956 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1957 break; 1958 // Fall through. 1959 case tok::kw_typename: // typename foo::bar 1960 // Annotate typenames and C++ scope specifiers. If we get one, just 1961 // recurse to handle whatever we get. 1962 if (TryAnnotateTypeOrScopeToken()) 1963 return true; 1964 if (Tok.is(tok::identifier)) 1965 return false; 1966 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1967 TemplateInfo, SuppressDeclarations); 1968 case tok::coloncolon: // ::foo::bar 1969 if (NextToken().is(tok::kw_new) || // ::new 1970 NextToken().is(tok::kw_delete)) // ::delete 1971 return false; 1972 1973 // Annotate typenames and C++ scope specifiers. If we get one, just 1974 // recurse to handle whatever we get. 1975 if (TryAnnotateTypeOrScopeToken()) 1976 return true; 1977 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1978 TemplateInfo, SuppressDeclarations); 1979 1980 // simple-type-specifier: 1981 case tok::annot_typename: { 1982 if (ParsedType T = getTypeAnnotation(Tok)) { 1983 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, 1984 Tok.getAnnotationEndLoc(), PrevSpec, 1985 DiagID, T); 1986 } else 1987 DS.SetTypeSpecError(); 1988 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1989 ConsumeToken(); // The typename 1990 1991 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1992 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1993 // Objective-C interface. If we don't have Objective-C or a '<', this is 1994 // just a normal reference to a typedef name. 1995 if (Tok.is(tok::less) && getLang().ObjC1) 1996 ParseObjCProtocolQualifiers(DS); 1997 1998 return true; 1999 } 2000 2001 case tok::kw_short: 2002 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 2003 break; 2004 case tok::kw_long: 2005 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 2006 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 2007 DiagID); 2008 else 2009 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 2010 DiagID); 2011 break; 2012 case tok::kw___int64: 2013 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 2014 DiagID); 2015 break; 2016 case tok::kw_signed: 2017 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 2018 break; 2019 case tok::kw_unsigned: 2020 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 2021 DiagID); 2022 break; 2023 case tok::kw__Complex: 2024 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 2025 DiagID); 2026 break; 2027 case tok::kw__Imaginary: 2028 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 2029 DiagID); 2030 break; 2031 case tok::kw_void: 2032 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 2033 break; 2034 case tok::kw_char: 2035 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 2036 break; 2037 case tok::kw_int: 2038 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 2039 break; 2040 case tok::kw_float: 2041 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 2042 break; 2043 case tok::kw_double: 2044 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 2045 break; 2046 case tok::kw_wchar_t: 2047 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 2048 break; 2049 case tok::kw_char16_t: 2050 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 2051 break; 2052 case tok::kw_char32_t: 2053 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 2054 break; 2055 case tok::kw_bool: 2056 case tok::kw__Bool: 2057 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 2058 break; 2059 case tok::kw__Decimal32: 2060 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 2061 DiagID); 2062 break; 2063 case tok::kw__Decimal64: 2064 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 2065 DiagID); 2066 break; 2067 case tok::kw__Decimal128: 2068 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 2069 DiagID); 2070 break; 2071 case tok::kw___vector: 2072 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 2073 break; 2074 case tok::kw___pixel: 2075 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 2076 break; 2077 2078 // class-specifier: 2079 case tok::kw_class: 2080 case tok::kw_struct: 2081 case tok::kw_union: { 2082 tok::TokenKind Kind = Tok.getKind(); 2083 ConsumeToken(); 2084 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS_none, 2085 SuppressDeclarations); 2086 return true; 2087 } 2088 2089 // enum-specifier: 2090 case tok::kw_enum: 2091 ConsumeToken(); 2092 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS_none); 2093 return true; 2094 2095 // cv-qualifier: 2096 case tok::kw_const: 2097 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 2098 DiagID, getLang()); 2099 break; 2100 case tok::kw_volatile: 2101 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 2102 DiagID, getLang()); 2103 break; 2104 case tok::kw_restrict: 2105 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 2106 DiagID, getLang()); 2107 break; 2108 2109 // GNU typeof support. 2110 case tok::kw_typeof: 2111 ParseTypeofSpecifier(DS); 2112 return true; 2113 2114 // C++0x decltype support. 2115 case tok::kw_decltype: 2116 ParseDecltypeSpecifier(DS); 2117 return true; 2118 2119 // OpenCL qualifiers: 2120 case tok::kw_private: 2121 if (!getLang().OpenCL) 2122 return false; 2123 case tok::kw___private: 2124 case tok::kw___global: 2125 case tok::kw___local: 2126 case tok::kw___constant: 2127 case tok::kw___read_only: 2128 case tok::kw___write_only: 2129 case tok::kw___read_write: 2130 ParseOpenCLQualifiers(DS); 2131 break; 2132 2133 // C++0x auto support. 2134 case tok::kw_auto: 2135 if (!getLang().CPlusPlus0x) 2136 return false; 2137 2138 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 2139 break; 2140 2141 case tok::kw___ptr64: 2142 case tok::kw___w64: 2143 case tok::kw___cdecl: 2144 case tok::kw___stdcall: 2145 case tok::kw___fastcall: 2146 case tok::kw___thiscall: 2147 ParseMicrosoftTypeAttributes(DS.getAttributes()); 2148 return true; 2149 2150 case tok::kw___pascal: 2151 ParseBorlandTypeAttributes(DS.getAttributes()); 2152 return true; 2153 2154 default: 2155 // Not a type-specifier; do nothing. 2156 return false; 2157 } 2158 2159 // If the specifier combination wasn't legal, issue a diagnostic. 2160 if (isInvalid) { 2161 assert(PrevSpec && "Method did not return previous specifier!"); 2162 // Pick between error or extwarn. 2163 Diag(Tok, DiagID) << PrevSpec; 2164 } 2165 DS.SetRangeEnd(Tok.getLocation()); 2166 ConsumeToken(); // whatever we parsed above. 2167 return true; 2168} 2169 2170/// ParseStructDeclaration - Parse a struct declaration without the terminating 2171/// semicolon. 2172/// 2173/// struct-declaration: 2174/// specifier-qualifier-list struct-declarator-list 2175/// [GNU] __extension__ struct-declaration 2176/// [GNU] specifier-qualifier-list 2177/// struct-declarator-list: 2178/// struct-declarator 2179/// struct-declarator-list ',' struct-declarator 2180/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 2181/// struct-declarator: 2182/// declarator 2183/// [GNU] declarator attributes[opt] 2184/// declarator[opt] ':' constant-expression 2185/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 2186/// 2187void Parser:: 2188ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) { 2189 if (Tok.is(tok::kw___extension__)) { 2190 // __extension__ silences extension warnings in the subexpression. 2191 ExtensionRAIIObject O(Diags); // Use RAII to do this. 2192 ConsumeToken(); 2193 return ParseStructDeclaration(DS, Fields); 2194 } 2195 2196 // Parse the common specifier-qualifiers-list piece. 2197 ParseSpecifierQualifierList(DS); 2198 2199 // If there are no declarators, this is a free-standing declaration 2200 // specifier. Let the actions module cope with it. 2201 if (Tok.is(tok::semi)) { 2202 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, DS); 2203 return; 2204 } 2205 2206 // Read struct-declarators until we find the semicolon. 2207 bool FirstDeclarator = true; 2208 while (1) { 2209 ParsingDeclRAIIObject PD(*this); 2210 FieldDeclarator DeclaratorInfo(DS); 2211 2212 // Attributes are only allowed here on successive declarators. 2213 if (!FirstDeclarator) 2214 MaybeParseGNUAttributes(DeclaratorInfo.D); 2215 2216 /// struct-declarator: declarator 2217 /// struct-declarator: declarator[opt] ':' constant-expression 2218 if (Tok.isNot(tok::colon)) { 2219 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 2220 ColonProtectionRAIIObject X(*this); 2221 ParseDeclarator(DeclaratorInfo.D); 2222 } 2223 2224 if (Tok.is(tok::colon)) { 2225 ConsumeToken(); 2226 ExprResult Res(ParseConstantExpression()); 2227 if (Res.isInvalid()) 2228 SkipUntil(tok::semi, true, true); 2229 else 2230 DeclaratorInfo.BitfieldSize = Res.release(); 2231 } 2232 2233 // If attributes exist after the declarator, parse them. 2234 MaybeParseGNUAttributes(DeclaratorInfo.D); 2235 2236 // We're done with this declarator; invoke the callback. 2237 Decl *D = Fields.invoke(DeclaratorInfo); 2238 PD.complete(D); 2239 2240 // If we don't have a comma, it is either the end of the list (a ';') 2241 // or an error, bail out. 2242 if (Tok.isNot(tok::comma)) 2243 return; 2244 2245 // Consume the comma. 2246 ConsumeToken(); 2247 2248 FirstDeclarator = false; 2249 } 2250} 2251 2252/// ParseStructUnionBody 2253/// struct-contents: 2254/// struct-declaration-list 2255/// [EXT] empty 2256/// [GNU] "struct-declaration-list" without terminatoring ';' 2257/// struct-declaration-list: 2258/// struct-declaration 2259/// struct-declaration-list struct-declaration 2260/// [OBC] '@' 'defs' '(' class-name ')' 2261/// 2262void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 2263 unsigned TagType, Decl *TagDecl) { 2264 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 2265 "parsing struct/union body"); 2266 2267 SourceLocation LBraceLoc = ConsumeBrace(); 2268 2269 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 2270 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 2271 2272 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 2273 // C++. 2274 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 2275 Diag(Tok, diag::ext_empty_struct_union) 2276 << (TagType == TST_union); 2277 2278 llvm::SmallVector<Decl *, 32> FieldDecls; 2279 2280 // While we still have something to read, read the declarations in the struct. 2281 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2282 // Each iteration of this loop reads one struct-declaration. 2283 2284 // Check for extraneous top-level semicolon. 2285 if (Tok.is(tok::semi)) { 2286 Diag(Tok, diag::ext_extra_struct_semi) 2287 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 2288 << FixItHint::CreateRemoval(Tok.getLocation()); 2289 ConsumeToken(); 2290 continue; 2291 } 2292 2293 // Parse all the comma separated declarators. 2294 DeclSpec DS(AttrFactory); 2295 2296 if (!Tok.is(tok::at)) { 2297 struct CFieldCallback : FieldCallback { 2298 Parser &P; 2299 Decl *TagDecl; 2300 llvm::SmallVectorImpl<Decl *> &FieldDecls; 2301 2302 CFieldCallback(Parser &P, Decl *TagDecl, 2303 llvm::SmallVectorImpl<Decl *> &FieldDecls) : 2304 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {} 2305 2306 virtual Decl *invoke(FieldDeclarator &FD) { 2307 // Install the declarator into the current TagDecl. 2308 Decl *Field = P.Actions.ActOnField(P.getCurScope(), TagDecl, 2309 FD.D.getDeclSpec().getSourceRange().getBegin(), 2310 FD.D, FD.BitfieldSize); 2311 FieldDecls.push_back(Field); 2312 return Field; 2313 } 2314 } Callback(*this, TagDecl, FieldDecls); 2315 2316 ParseStructDeclaration(DS, Callback); 2317 } else { // Handle @defs 2318 ConsumeToken(); 2319 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 2320 Diag(Tok, diag::err_unexpected_at); 2321 SkipUntil(tok::semi, true); 2322 continue; 2323 } 2324 ConsumeToken(); 2325 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 2326 if (!Tok.is(tok::identifier)) { 2327 Diag(Tok, diag::err_expected_ident); 2328 SkipUntil(tok::semi, true); 2329 continue; 2330 } 2331 llvm::SmallVector<Decl *, 16> Fields; 2332 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(), 2333 Tok.getIdentifierInfo(), Fields); 2334 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 2335 ConsumeToken(); 2336 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 2337 } 2338 2339 if (Tok.is(tok::semi)) { 2340 ConsumeToken(); 2341 } else if (Tok.is(tok::r_brace)) { 2342 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list); 2343 break; 2344 } else { 2345 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); 2346 // Skip to end of block or statement to avoid ext-warning on extra ';'. 2347 SkipUntil(tok::r_brace, true, true); 2348 // If we stopped at a ';', eat it. 2349 if (Tok.is(tok::semi)) ConsumeToken(); 2350 } 2351 } 2352 2353 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 2354 2355 ParsedAttributes attrs(AttrFactory); 2356 // If attributes exist after struct contents, parse them. 2357 MaybeParseGNUAttributes(attrs); 2358 2359 Actions.ActOnFields(getCurScope(), 2360 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 2361 LBraceLoc, RBraceLoc, 2362 attrs.getList()); 2363 StructScope.Exit(); 2364 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, RBraceLoc); 2365} 2366 2367/// ParseEnumSpecifier 2368/// enum-specifier: [C99 6.7.2.2] 2369/// 'enum' identifier[opt] '{' enumerator-list '}' 2370///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 2371/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 2372/// '}' attributes[opt] 2373/// 'enum' identifier 2374/// [GNU] 'enum' attributes[opt] identifier 2375/// 2376/// [C++0x] enum-head '{' enumerator-list[opt] '}' 2377/// [C++0x] enum-head '{' enumerator-list ',' '}' 2378/// 2379/// enum-head: [C++0x] 2380/// enum-key attributes[opt] identifier[opt] enum-base[opt] 2381/// enum-key attributes[opt] nested-name-specifier identifier enum-base[opt] 2382/// 2383/// enum-key: [C++0x] 2384/// 'enum' 2385/// 'enum' 'class' 2386/// 'enum' 'struct' 2387/// 2388/// enum-base: [C++0x] 2389/// ':' type-specifier-seq 2390/// 2391/// [C++] elaborated-type-specifier: 2392/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 2393/// 2394void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 2395 const ParsedTemplateInfo &TemplateInfo, 2396 AccessSpecifier AS) { 2397 // Parse the tag portion of this. 2398 if (Tok.is(tok::code_completion)) { 2399 // Code completion for an enum name. 2400 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum); 2401 ConsumeCodeCompletionToken(); 2402 } 2403 2404 // If attributes exist after tag, parse them. 2405 ParsedAttributes attrs(AttrFactory); 2406 MaybeParseGNUAttributes(attrs); 2407 2408 CXXScopeSpec &SS = DS.getTypeSpecScope(); 2409 if (getLang().CPlusPlus) { 2410 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false)) 2411 return; 2412 2413 if (SS.isSet() && Tok.isNot(tok::identifier)) { 2414 Diag(Tok, diag::err_expected_ident); 2415 if (Tok.isNot(tok::l_brace)) { 2416 // Has no name and is not a definition. 2417 // Skip the rest of this declarator, up until the comma or semicolon. 2418 SkipUntil(tok::comma, true); 2419 return; 2420 } 2421 } 2422 } 2423 2424 bool AllowFixedUnderlyingType = getLang().CPlusPlus0x || getLang().Microsoft; 2425 bool IsScopedEnum = false; 2426 bool IsScopedUsingClassTag = false; 2427 2428 if (getLang().CPlusPlus0x && 2429 (Tok.is(tok::kw_class) || Tok.is(tok::kw_struct))) { 2430 IsScopedEnum = true; 2431 IsScopedUsingClassTag = Tok.is(tok::kw_class); 2432 ConsumeToken(); 2433 } 2434 2435 // Must have either 'enum name' or 'enum {...}'. 2436 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) && 2437 (AllowFixedUnderlyingType && Tok.isNot(tok::colon))) { 2438 Diag(Tok, diag::err_expected_ident_lbrace); 2439 2440 // Skip the rest of this declarator, up until the comma or semicolon. 2441 SkipUntil(tok::comma, true); 2442 return; 2443 } 2444 2445 // If an identifier is present, consume and remember it. 2446 IdentifierInfo *Name = 0; 2447 SourceLocation NameLoc; 2448 if (Tok.is(tok::identifier)) { 2449 Name = Tok.getIdentifierInfo(); 2450 NameLoc = ConsumeToken(); 2451 } 2452 2453 if (!Name && IsScopedEnum) { 2454 // C++0x 7.2p2: The optional identifier shall not be omitted in the 2455 // declaration of a scoped enumeration. 2456 Diag(Tok, diag::err_scoped_enum_missing_identifier); 2457 IsScopedEnum = false; 2458 IsScopedUsingClassTag = false; 2459 } 2460 2461 TypeResult BaseType; 2462 2463 // Parse the fixed underlying type. 2464 if (AllowFixedUnderlyingType && Tok.is(tok::colon)) { 2465 bool PossibleBitfield = false; 2466 if (getCurScope()->getFlags() & Scope::ClassScope) { 2467 // If we're in class scope, this can either be an enum declaration with 2468 // an underlying type, or a declaration of a bitfield member. We try to 2469 // use a simple disambiguation scheme first to catch the common cases 2470 // (integer literal, sizeof); if it's still ambiguous, we then consider 2471 // anything that's a simple-type-specifier followed by '(' as an 2472 // expression. This suffices because function types are not valid 2473 // underlying types anyway. 2474 TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind()); 2475 // If the next token starts an expression, we know we're parsing a 2476 // bit-field. This is the common case. 2477 if (TPR == TPResult::True()) 2478 PossibleBitfield = true; 2479 // If the next token starts a type-specifier-seq, it may be either a 2480 // a fixed underlying type or the start of a function-style cast in C++; 2481 // lookahead one more token to see if it's obvious that we have a 2482 // fixed underlying type. 2483 else if (TPR == TPResult::False() && 2484 GetLookAheadToken(2).getKind() == tok::semi) { 2485 // Consume the ':'. 2486 ConsumeToken(); 2487 } else { 2488 // We have the start of a type-specifier-seq, so we have to perform 2489 // tentative parsing to determine whether we have an expression or a 2490 // type. 2491 TentativeParsingAction TPA(*this); 2492 2493 // Consume the ':'. 2494 ConsumeToken(); 2495 2496 if ((getLang().CPlusPlus && 2497 isCXXDeclarationSpecifier() != TPResult::True()) || 2498 (!getLang().CPlusPlus && !isDeclarationSpecifier(true))) { 2499 // We'll parse this as a bitfield later. 2500 PossibleBitfield = true; 2501 TPA.Revert(); 2502 } else { 2503 // We have a type-specifier-seq. 2504 TPA.Commit(); 2505 } 2506 } 2507 } else { 2508 // Consume the ':'. 2509 ConsumeToken(); 2510 } 2511 2512 if (!PossibleBitfield) { 2513 SourceRange Range; 2514 BaseType = ParseTypeName(&Range); 2515 2516 if (!getLang().CPlusPlus0x) 2517 Diag(StartLoc, diag::ext_ms_enum_fixed_underlying_type) 2518 << Range; 2519 } 2520 } 2521 2522 // There are three options here. If we have 'enum foo;', then this is a 2523 // forward declaration. If we have 'enum foo {...' then this is a 2524 // definition. Otherwise we have something like 'enum foo xyz', a reference. 2525 // 2526 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 2527 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 2528 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 2529 // 2530 Sema::TagUseKind TUK; 2531 if (Tok.is(tok::l_brace)) 2532 TUK = Sema::TUK_Definition; 2533 else if (Tok.is(tok::semi)) 2534 TUK = Sema::TUK_Declaration; 2535 else 2536 TUK = Sema::TUK_Reference; 2537 2538 // enums cannot be templates, although they can be referenced from a 2539 // template. 2540 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate && 2541 TUK != Sema::TUK_Reference) { 2542 Diag(Tok, diag::err_enum_template); 2543 2544 // Skip the rest of this declarator, up until the comma or semicolon. 2545 SkipUntil(tok::comma, true); 2546 return; 2547 } 2548 2549 if (!Name && TUK != Sema::TUK_Definition) { 2550 Diag(Tok, diag::err_enumerator_unnamed_no_def); 2551 2552 // Skip the rest of this declarator, up until the comma or semicolon. 2553 SkipUntil(tok::comma, true); 2554 return; 2555 } 2556 2557 bool Owned = false; 2558 bool IsDependent = false; 2559 const char *PrevSpec = 0; 2560 unsigned DiagID; 2561 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK, 2562 StartLoc, SS, Name, NameLoc, attrs.getList(), 2563 AS, 2564 MultiTemplateParamsArg(Actions), 2565 Owned, IsDependent, IsScopedEnum, 2566 IsScopedUsingClassTag, BaseType); 2567 2568 if (IsDependent) { 2569 // This enum has a dependent nested-name-specifier. Handle it as a 2570 // dependent tag. 2571 if (!Name) { 2572 DS.SetTypeSpecError(); 2573 Diag(Tok, diag::err_expected_type_name_after_typename); 2574 return; 2575 } 2576 2577 TypeResult Type = Actions.ActOnDependentTag(getCurScope(), DeclSpec::TST_enum, 2578 TUK, SS, Name, StartLoc, 2579 NameLoc); 2580 if (Type.isInvalid()) { 2581 DS.SetTypeSpecError(); 2582 return; 2583 } 2584 2585 if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, 2586 NameLoc.isValid() ? NameLoc : StartLoc, 2587 PrevSpec, DiagID, Type.get())) 2588 Diag(StartLoc, DiagID) << PrevSpec; 2589 2590 return; 2591 } 2592 2593 if (!TagDecl) { 2594 // The action failed to produce an enumeration tag. If this is a 2595 // definition, consume the entire definition. 2596 if (Tok.is(tok::l_brace)) { 2597 ConsumeBrace(); 2598 SkipUntil(tok::r_brace); 2599 } 2600 2601 DS.SetTypeSpecError(); 2602 return; 2603 } 2604 2605 if (Tok.is(tok::l_brace)) 2606 ParseEnumBody(StartLoc, TagDecl); 2607 2608 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc, 2609 NameLoc.isValid() ? NameLoc : StartLoc, 2610 PrevSpec, DiagID, TagDecl, Owned)) 2611 Diag(StartLoc, DiagID) << PrevSpec; 2612} 2613 2614/// ParseEnumBody - Parse a {} enclosed enumerator-list. 2615/// enumerator-list: 2616/// enumerator 2617/// enumerator-list ',' enumerator 2618/// enumerator: 2619/// enumeration-constant 2620/// enumeration-constant '=' constant-expression 2621/// enumeration-constant: 2622/// identifier 2623/// 2624void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) { 2625 // Enter the scope of the enum body and start the definition. 2626 ParseScope EnumScope(this, Scope::DeclScope); 2627 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl); 2628 2629 SourceLocation LBraceLoc = ConsumeBrace(); 2630 2631 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 2632 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 2633 Diag(Tok, diag::error_empty_enum); 2634 2635 llvm::SmallVector<Decl *, 32> EnumConstantDecls; 2636 2637 Decl *LastEnumConstDecl = 0; 2638 2639 // Parse the enumerator-list. 2640 while (Tok.is(tok::identifier)) { 2641 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 2642 SourceLocation IdentLoc = ConsumeToken(); 2643 2644 // If attributes exist after the enumerator, parse them. 2645 ParsedAttributes attrs(AttrFactory); 2646 MaybeParseGNUAttributes(attrs); 2647 2648 SourceLocation EqualLoc; 2649 ExprResult AssignedVal; 2650 if (Tok.is(tok::equal)) { 2651 EqualLoc = ConsumeToken(); 2652 AssignedVal = ParseConstantExpression(); 2653 if (AssignedVal.isInvalid()) 2654 SkipUntil(tok::comma, tok::r_brace, true, true); 2655 } 2656 2657 // Install the enumerator constant into EnumDecl. 2658 Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl, 2659 LastEnumConstDecl, 2660 IdentLoc, Ident, 2661 attrs.getList(), EqualLoc, 2662 AssignedVal.release()); 2663 EnumConstantDecls.push_back(EnumConstDecl); 2664 LastEnumConstDecl = EnumConstDecl; 2665 2666 if (Tok.is(tok::identifier)) { 2667 // We're missing a comma between enumerators. 2668 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2669 Diag(Loc, diag::err_enumerator_list_missing_comma) 2670 << FixItHint::CreateInsertion(Loc, ", "); 2671 continue; 2672 } 2673 2674 if (Tok.isNot(tok::comma)) 2675 break; 2676 SourceLocation CommaLoc = ConsumeToken(); 2677 2678 if (Tok.isNot(tok::identifier) && 2679 !(getLang().C99 || getLang().CPlusPlus0x)) 2680 Diag(CommaLoc, diag::ext_enumerator_list_comma) 2681 << getLang().CPlusPlus 2682 << FixItHint::CreateRemoval(CommaLoc); 2683 } 2684 2685 // Eat the }. 2686 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 2687 2688 // If attributes exist after the identifier list, parse them. 2689 ParsedAttributes attrs(AttrFactory); 2690 MaybeParseGNUAttributes(attrs); 2691 2692 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 2693 EnumConstantDecls.data(), EnumConstantDecls.size(), 2694 getCurScope(), attrs.getList()); 2695 2696 EnumScope.Exit(); 2697 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl, RBraceLoc); 2698} 2699 2700/// isTypeSpecifierQualifier - Return true if the current token could be the 2701/// start of a type-qualifier-list. 2702bool Parser::isTypeQualifier() const { 2703 switch (Tok.getKind()) { 2704 default: return false; 2705 2706 // type-qualifier only in OpenCL 2707 case tok::kw_private: 2708 return getLang().OpenCL; 2709 2710 // type-qualifier 2711 case tok::kw_const: 2712 case tok::kw_volatile: 2713 case tok::kw_restrict: 2714 case tok::kw___private: 2715 case tok::kw___local: 2716 case tok::kw___global: 2717 case tok::kw___constant: 2718 case tok::kw___read_only: 2719 case tok::kw___read_write: 2720 case tok::kw___write_only: 2721 return true; 2722 } 2723} 2724 2725/// isKnownToBeTypeSpecifier - Return true if we know that the specified token 2726/// is definitely a type-specifier. Return false if it isn't part of a type 2727/// specifier or if we're not sure. 2728bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const { 2729 switch (Tok.getKind()) { 2730 default: return false; 2731 // type-specifiers 2732 case tok::kw_short: 2733 case tok::kw_long: 2734 case tok::kw___int64: 2735 case tok::kw_signed: 2736 case tok::kw_unsigned: 2737 case tok::kw__Complex: 2738 case tok::kw__Imaginary: 2739 case tok::kw_void: 2740 case tok::kw_char: 2741 case tok::kw_wchar_t: 2742 case tok::kw_char16_t: 2743 case tok::kw_char32_t: 2744 case tok::kw_int: 2745 case tok::kw_float: 2746 case tok::kw_double: 2747 case tok::kw_bool: 2748 case tok::kw__Bool: 2749 case tok::kw__Decimal32: 2750 case tok::kw__Decimal64: 2751 case tok::kw__Decimal128: 2752 case tok::kw___vector: 2753 2754 // struct-or-union-specifier (C99) or class-specifier (C++) 2755 case tok::kw_class: 2756 case tok::kw_struct: 2757 case tok::kw_union: 2758 // enum-specifier 2759 case tok::kw_enum: 2760 2761 // typedef-name 2762 case tok::annot_typename: 2763 return true; 2764 } 2765} 2766 2767/// isTypeSpecifierQualifier - Return true if the current token could be the 2768/// start of a specifier-qualifier-list. 2769bool Parser::isTypeSpecifierQualifier() { 2770 switch (Tok.getKind()) { 2771 default: return false; 2772 2773 case tok::identifier: // foo::bar 2774 if (TryAltiVecVectorToken()) 2775 return true; 2776 // Fall through. 2777 case tok::kw_typename: // typename T::type 2778 // Annotate typenames and C++ scope specifiers. If we get one, just 2779 // recurse to handle whatever we get. 2780 if (TryAnnotateTypeOrScopeToken()) 2781 return true; 2782 if (Tok.is(tok::identifier)) 2783 return false; 2784 return isTypeSpecifierQualifier(); 2785 2786 case tok::coloncolon: // ::foo::bar 2787 if (NextToken().is(tok::kw_new) || // ::new 2788 NextToken().is(tok::kw_delete)) // ::delete 2789 return false; 2790 2791 if (TryAnnotateTypeOrScopeToken()) 2792 return true; 2793 return isTypeSpecifierQualifier(); 2794 2795 // GNU attributes support. 2796 case tok::kw___attribute: 2797 // GNU typeof support. 2798 case tok::kw_typeof: 2799 2800 // type-specifiers 2801 case tok::kw_short: 2802 case tok::kw_long: 2803 case tok::kw___int64: 2804 case tok::kw_signed: 2805 case tok::kw_unsigned: 2806 case tok::kw__Complex: 2807 case tok::kw__Imaginary: 2808 case tok::kw_void: 2809 case tok::kw_char: 2810 case tok::kw_wchar_t: 2811 case tok::kw_char16_t: 2812 case tok::kw_char32_t: 2813 case tok::kw_int: 2814 case tok::kw_float: 2815 case tok::kw_double: 2816 case tok::kw_bool: 2817 case tok::kw__Bool: 2818 case tok::kw__Decimal32: 2819 case tok::kw__Decimal64: 2820 case tok::kw__Decimal128: 2821 case tok::kw___vector: 2822 2823 // struct-or-union-specifier (C99) or class-specifier (C++) 2824 case tok::kw_class: 2825 case tok::kw_struct: 2826 case tok::kw_union: 2827 // enum-specifier 2828 case tok::kw_enum: 2829 2830 // type-qualifier 2831 case tok::kw_const: 2832 case tok::kw_volatile: 2833 case tok::kw_restrict: 2834 2835 // typedef-name 2836 case tok::annot_typename: 2837 return true; 2838 2839 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2840 case tok::less: 2841 return getLang().ObjC1; 2842 2843 case tok::kw___cdecl: 2844 case tok::kw___stdcall: 2845 case tok::kw___fastcall: 2846 case tok::kw___thiscall: 2847 case tok::kw___w64: 2848 case tok::kw___ptr64: 2849 case tok::kw___pascal: 2850 2851 case tok::kw___private: 2852 case tok::kw___local: 2853 case tok::kw___global: 2854 case tok::kw___constant: 2855 case tok::kw___read_only: 2856 case tok::kw___read_write: 2857 case tok::kw___write_only: 2858 2859 return true; 2860 2861 case tok::kw_private: 2862 return getLang().OpenCL; 2863 } 2864} 2865 2866/// isDeclarationSpecifier() - Return true if the current token is part of a 2867/// declaration specifier. 2868/// 2869/// \param DisambiguatingWithExpression True to indicate that the purpose of 2870/// this check is to disambiguate between an expression and a declaration. 2871bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) { 2872 switch (Tok.getKind()) { 2873 default: return false; 2874 2875 case tok::kw_private: 2876 return getLang().OpenCL; 2877 2878 case tok::identifier: // foo::bar 2879 // Unfortunate hack to support "Class.factoryMethod" notation. 2880 if (getLang().ObjC1 && NextToken().is(tok::period)) 2881 return false; 2882 if (TryAltiVecVectorToken()) 2883 return true; 2884 // Fall through. 2885 case tok::kw_typename: // typename T::type 2886 // Annotate typenames and C++ scope specifiers. If we get one, just 2887 // recurse to handle whatever we get. 2888 if (TryAnnotateTypeOrScopeToken()) 2889 return true; 2890 if (Tok.is(tok::identifier)) 2891 return false; 2892 2893 // If we're in Objective-C and we have an Objective-C class type followed 2894 // by an identifier and then either ':' or ']', in a place where an 2895 // expression is permitted, then this is probably a class message send 2896 // missing the initial '['. In this case, we won't consider this to be 2897 // the start of a declaration. 2898 if (DisambiguatingWithExpression && 2899 isStartOfObjCClassMessageMissingOpenBracket()) 2900 return false; 2901 2902 return isDeclarationSpecifier(); 2903 2904 case tok::coloncolon: // ::foo::bar 2905 if (NextToken().is(tok::kw_new) || // ::new 2906 NextToken().is(tok::kw_delete)) // ::delete 2907 return false; 2908 2909 // Annotate typenames and C++ scope specifiers. If we get one, just 2910 // recurse to handle whatever we get. 2911 if (TryAnnotateTypeOrScopeToken()) 2912 return true; 2913 return isDeclarationSpecifier(); 2914 2915 // storage-class-specifier 2916 case tok::kw_typedef: 2917 case tok::kw_extern: 2918 case tok::kw___private_extern__: 2919 case tok::kw_static: 2920 case tok::kw_auto: 2921 case tok::kw_register: 2922 case tok::kw___thread: 2923 2924 // type-specifiers 2925 case tok::kw_short: 2926 case tok::kw_long: 2927 case tok::kw___int64: 2928 case tok::kw_signed: 2929 case tok::kw_unsigned: 2930 case tok::kw__Complex: 2931 case tok::kw__Imaginary: 2932 case tok::kw_void: 2933 case tok::kw_char: 2934 case tok::kw_wchar_t: 2935 case tok::kw_char16_t: 2936 case tok::kw_char32_t: 2937 2938 case tok::kw_int: 2939 case tok::kw_float: 2940 case tok::kw_double: 2941 case tok::kw_bool: 2942 case tok::kw__Bool: 2943 case tok::kw__Decimal32: 2944 case tok::kw__Decimal64: 2945 case tok::kw__Decimal128: 2946 case tok::kw___vector: 2947 2948 // struct-or-union-specifier (C99) or class-specifier (C++) 2949 case tok::kw_class: 2950 case tok::kw_struct: 2951 case tok::kw_union: 2952 // enum-specifier 2953 case tok::kw_enum: 2954 2955 // type-qualifier 2956 case tok::kw_const: 2957 case tok::kw_volatile: 2958 case tok::kw_restrict: 2959 2960 // function-specifier 2961 case tok::kw_inline: 2962 case tok::kw_virtual: 2963 case tok::kw_explicit: 2964 2965 // static_assert-declaration 2966 case tok::kw__Static_assert: 2967 2968 // GNU typeof support. 2969 case tok::kw_typeof: 2970 2971 // GNU attributes. 2972 case tok::kw___attribute: 2973 return true; 2974 2975 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2976 case tok::less: 2977 return getLang().ObjC1; 2978 2979 // typedef-name 2980 case tok::annot_typename: 2981 return !DisambiguatingWithExpression || 2982 !isStartOfObjCClassMessageMissingOpenBracket(); 2983 2984 case tok::kw___declspec: 2985 case tok::kw___cdecl: 2986 case tok::kw___stdcall: 2987 case tok::kw___fastcall: 2988 case tok::kw___thiscall: 2989 case tok::kw___w64: 2990 case tok::kw___ptr64: 2991 case tok::kw___forceinline: 2992 case tok::kw___pascal: 2993 2994 case tok::kw___private: 2995 case tok::kw___local: 2996 case tok::kw___global: 2997 case tok::kw___constant: 2998 case tok::kw___read_only: 2999 case tok::kw___read_write: 3000 case tok::kw___write_only: 3001 3002 return true; 3003 } 3004} 3005 3006bool Parser::isConstructorDeclarator() { 3007 TentativeParsingAction TPA(*this); 3008 3009 // Parse the C++ scope specifier. 3010 CXXScopeSpec SS; 3011 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true)) { 3012 TPA.Revert(); 3013 return false; 3014 } 3015 3016 // Parse the constructor name. 3017 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 3018 // We already know that we have a constructor name; just consume 3019 // the token. 3020 ConsumeToken(); 3021 } else { 3022 TPA.Revert(); 3023 return false; 3024 } 3025 3026 // Current class name must be followed by a left parentheses. 3027 if (Tok.isNot(tok::l_paren)) { 3028 TPA.Revert(); 3029 return false; 3030 } 3031 ConsumeParen(); 3032 3033 // A right parentheses or ellipsis signals that we have a constructor. 3034 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) { 3035 TPA.Revert(); 3036 return true; 3037 } 3038 3039 // If we need to, enter the specified scope. 3040 DeclaratorScopeObj DeclScopeObj(*this, SS); 3041 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS)) 3042 DeclScopeObj.EnterDeclaratorScope(); 3043 3044 // Optionally skip Microsoft attributes. 3045 ParsedAttributes Attrs(AttrFactory); 3046 MaybeParseMicrosoftAttributes(Attrs); 3047 3048 // Check whether the next token(s) are part of a declaration 3049 // specifier, in which case we have the start of a parameter and, 3050 // therefore, we know that this is a constructor. 3051 bool IsConstructor = isDeclarationSpecifier(); 3052 TPA.Revert(); 3053 return IsConstructor; 3054} 3055 3056/// ParseTypeQualifierListOpt 3057/// type-qualifier-list: [C99 6.7.5] 3058/// type-qualifier 3059/// [vendor] attributes 3060/// [ only if VendorAttributesAllowed=true ] 3061/// type-qualifier-list type-qualifier 3062/// [vendor] type-qualifier-list attributes 3063/// [ only if VendorAttributesAllowed=true ] 3064/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq 3065/// [ only if CXX0XAttributesAllowed=true ] 3066/// Note: vendor can be GNU, MS, etc. 3067/// 3068void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, 3069 bool VendorAttributesAllowed, 3070 bool CXX0XAttributesAllowed) { 3071 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3072 SourceLocation Loc = Tok.getLocation(); 3073 ParsedAttributesWithRange attrs(AttrFactory); 3074 ParseCXX0XAttributes(attrs); 3075 if (CXX0XAttributesAllowed) 3076 DS.takeAttributesFrom(attrs); 3077 else 3078 Diag(Loc, diag::err_attributes_not_allowed); 3079 } 3080 3081 SourceLocation EndLoc; 3082 3083 while (1) { 3084 bool isInvalid = false; 3085 const char *PrevSpec = 0; 3086 unsigned DiagID = 0; 3087 SourceLocation Loc = Tok.getLocation(); 3088 3089 switch (Tok.getKind()) { 3090 case tok::code_completion: 3091 Actions.CodeCompleteTypeQualifiers(DS); 3092 ConsumeCodeCompletionToken(); 3093 break; 3094 3095 case tok::kw_const: 3096 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 3097 getLang()); 3098 break; 3099 case tok::kw_volatile: 3100 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 3101 getLang()); 3102 break; 3103 case tok::kw_restrict: 3104 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 3105 getLang()); 3106 break; 3107 3108 // OpenCL qualifiers: 3109 case tok::kw_private: 3110 if (!getLang().OpenCL) 3111 goto DoneWithTypeQuals; 3112 case tok::kw___private: 3113 case tok::kw___global: 3114 case tok::kw___local: 3115 case tok::kw___constant: 3116 case tok::kw___read_only: 3117 case tok::kw___write_only: 3118 case tok::kw___read_write: 3119 ParseOpenCLQualifiers(DS); 3120 break; 3121 3122 case tok::kw___w64: 3123 case tok::kw___ptr64: 3124 case tok::kw___cdecl: 3125 case tok::kw___stdcall: 3126 case tok::kw___fastcall: 3127 case tok::kw___thiscall: 3128 if (VendorAttributesAllowed) { 3129 ParseMicrosoftTypeAttributes(DS.getAttributes()); 3130 continue; 3131 } 3132 goto DoneWithTypeQuals; 3133 case tok::kw___pascal: 3134 if (VendorAttributesAllowed) { 3135 ParseBorlandTypeAttributes(DS.getAttributes()); 3136 continue; 3137 } 3138 goto DoneWithTypeQuals; 3139 case tok::kw___attribute: 3140 if (VendorAttributesAllowed) { 3141 ParseGNUAttributes(DS.getAttributes()); 3142 continue; // do *not* consume the next token! 3143 } 3144 // otherwise, FALL THROUGH! 3145 default: 3146 DoneWithTypeQuals: 3147 // If this is not a type-qualifier token, we're done reading type 3148 // qualifiers. First verify that DeclSpec's are consistent. 3149 DS.Finish(Diags, PP); 3150 if (EndLoc.isValid()) 3151 DS.SetRangeEnd(EndLoc); 3152 return; 3153 } 3154 3155 // If the specifier combination wasn't legal, issue a diagnostic. 3156 if (isInvalid) { 3157 assert(PrevSpec && "Method did not return previous specifier!"); 3158 Diag(Tok, DiagID) << PrevSpec; 3159 } 3160 EndLoc = ConsumeToken(); 3161 } 3162} 3163 3164 3165/// ParseDeclarator - Parse and verify a newly-initialized declarator. 3166/// 3167void Parser::ParseDeclarator(Declarator &D) { 3168 /// This implements the 'declarator' production in the C grammar, then checks 3169 /// for well-formedness and issues diagnostics. 3170 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 3171} 3172 3173/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 3174/// is parsed by the function passed to it. Pass null, and the direct-declarator 3175/// isn't parsed at all, making this function effectively parse the C++ 3176/// ptr-operator production. 3177/// 3178/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 3179/// [C] pointer[opt] direct-declarator 3180/// [C++] direct-declarator 3181/// [C++] ptr-operator declarator 3182/// 3183/// pointer: [C99 6.7.5] 3184/// '*' type-qualifier-list[opt] 3185/// '*' type-qualifier-list[opt] pointer 3186/// 3187/// ptr-operator: 3188/// '*' cv-qualifier-seq[opt] 3189/// '&' 3190/// [C++0x] '&&' 3191/// [GNU] '&' restrict[opt] attributes[opt] 3192/// [GNU?] '&&' restrict[opt] attributes[opt] 3193/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 3194void Parser::ParseDeclaratorInternal(Declarator &D, 3195 DirectDeclParseFunction DirectDeclParser) { 3196 if (Diags.hasAllExtensionsSilenced()) 3197 D.setExtension(); 3198 3199 // C++ member pointers start with a '::' or a nested-name. 3200 // Member pointers get special handling, since there's no place for the 3201 // scope spec in the generic path below. 3202 if (getLang().CPlusPlus && 3203 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 3204 Tok.is(tok::annot_cxxscope))) { 3205 CXXScopeSpec SS; 3206 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true); // ignore fail 3207 3208 if (SS.isNotEmpty()) { 3209 if (Tok.isNot(tok::star)) { 3210 // The scope spec really belongs to the direct-declarator. 3211 D.getCXXScopeSpec() = SS; 3212 if (DirectDeclParser) 3213 (this->*DirectDeclParser)(D); 3214 return; 3215 } 3216 3217 SourceLocation Loc = ConsumeToken(); 3218 D.SetRangeEnd(Loc); 3219 DeclSpec DS(AttrFactory); 3220 ParseTypeQualifierListOpt(DS); 3221 D.ExtendWithDeclSpec(DS); 3222 3223 // Recurse to parse whatever is left. 3224 ParseDeclaratorInternal(D, DirectDeclParser); 3225 3226 // Sema will have to catch (syntactically invalid) pointers into global 3227 // scope. It has to catch pointers into namespace scope anyway. 3228 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 3229 Loc), 3230 DS.getAttributes(), 3231 /* Don't replace range end. */SourceLocation()); 3232 return; 3233 } 3234 } 3235 3236 tok::TokenKind Kind = Tok.getKind(); 3237 // Not a pointer, C++ reference, or block. 3238 if (Kind != tok::star && Kind != tok::caret && 3239 (Kind != tok::amp || !getLang().CPlusPlus) && 3240 // We parse rvalue refs in C++03, because otherwise the errors are scary. 3241 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 3242 if (DirectDeclParser) 3243 (this->*DirectDeclParser)(D); 3244 return; 3245 } 3246 3247 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 3248 // '&&' -> rvalue reference 3249 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 3250 D.SetRangeEnd(Loc); 3251 3252 if (Kind == tok::star || Kind == tok::caret) { 3253 // Is a pointer. 3254 DeclSpec DS(AttrFactory); 3255 3256 ParseTypeQualifierListOpt(DS); 3257 D.ExtendWithDeclSpec(DS); 3258 3259 // Recursively parse the declarator. 3260 ParseDeclaratorInternal(D, DirectDeclParser); 3261 if (Kind == tok::star) 3262 // Remember that we parsed a pointer type, and remember the type-quals. 3263 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 3264 DS.getConstSpecLoc(), 3265 DS.getVolatileSpecLoc(), 3266 DS.getRestrictSpecLoc()), 3267 DS.getAttributes(), 3268 SourceLocation()); 3269 else 3270 // Remember that we parsed a Block type, and remember the type-quals. 3271 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 3272 Loc), 3273 DS.getAttributes(), 3274 SourceLocation()); 3275 } else { 3276 // Is a reference 3277 DeclSpec DS(AttrFactory); 3278 3279 // Complain about rvalue references in C++03, but then go on and build 3280 // the declarator. 3281 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 3282 Diag(Loc, diag::ext_rvalue_reference); 3283 3284 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 3285 // cv-qualifiers are introduced through the use of a typedef or of a 3286 // template type argument, in which case the cv-qualifiers are ignored. 3287 // 3288 // [GNU] Retricted references are allowed. 3289 // [GNU] Attributes on references are allowed. 3290 // [C++0x] Attributes on references are not allowed. 3291 ParseTypeQualifierListOpt(DS, true, false); 3292 D.ExtendWithDeclSpec(DS); 3293 3294 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 3295 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 3296 Diag(DS.getConstSpecLoc(), 3297 diag::err_invalid_reference_qualifier_application) << "const"; 3298 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 3299 Diag(DS.getVolatileSpecLoc(), 3300 diag::err_invalid_reference_qualifier_application) << "volatile"; 3301 } 3302 3303 // Recursively parse the declarator. 3304 ParseDeclaratorInternal(D, DirectDeclParser); 3305 3306 if (D.getNumTypeObjects() > 0) { 3307 // C++ [dcl.ref]p4: There shall be no references to references. 3308 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 3309 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 3310 if (const IdentifierInfo *II = D.getIdentifier()) 3311 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 3312 << II; 3313 else 3314 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 3315 << "type name"; 3316 3317 // Once we've complained about the reference-to-reference, we 3318 // can go ahead and build the (technically ill-formed) 3319 // declarator: reference collapsing will take care of it. 3320 } 3321 } 3322 3323 // Remember that we parsed a reference type. It doesn't have type-quals. 3324 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 3325 Kind == tok::amp), 3326 DS.getAttributes(), 3327 SourceLocation()); 3328 } 3329} 3330 3331/// ParseDirectDeclarator 3332/// direct-declarator: [C99 6.7.5] 3333/// [C99] identifier 3334/// '(' declarator ')' 3335/// [GNU] '(' attributes declarator ')' 3336/// [C90] direct-declarator '[' constant-expression[opt] ']' 3337/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 3338/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 3339/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 3340/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 3341/// direct-declarator '(' parameter-type-list ')' 3342/// direct-declarator '(' identifier-list[opt] ')' 3343/// [GNU] direct-declarator '(' parameter-forward-declarations 3344/// parameter-type-list[opt] ')' 3345/// [C++] direct-declarator '(' parameter-declaration-clause ')' 3346/// cv-qualifier-seq[opt] exception-specification[opt] 3347/// [C++] declarator-id 3348/// 3349/// declarator-id: [C++ 8] 3350/// '...'[opt] id-expression 3351/// '::'[opt] nested-name-specifier[opt] type-name 3352/// 3353/// id-expression: [C++ 5.1] 3354/// unqualified-id 3355/// qualified-id 3356/// 3357/// unqualified-id: [C++ 5.1] 3358/// identifier 3359/// operator-function-id 3360/// conversion-function-id 3361/// '~' class-name 3362/// template-id 3363/// 3364void Parser::ParseDirectDeclarator(Declarator &D) { 3365 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 3366 3367 if (getLang().CPlusPlus && D.mayHaveIdentifier()) { 3368 // ParseDeclaratorInternal might already have parsed the scope. 3369 if (D.getCXXScopeSpec().isEmpty()) { 3370 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(), true); 3371 } 3372 3373 if (D.getCXXScopeSpec().isValid()) { 3374 if (Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec())) 3375 // Change the declaration context for name lookup, until this function 3376 // is exited (and the declarator has been parsed). 3377 DeclScopeObj.EnterDeclaratorScope(); 3378 } 3379 3380 // C++0x [dcl.fct]p14: 3381 // There is a syntactic ambiguity when an ellipsis occurs at the end 3382 // of a parameter-declaration-clause without a preceding comma. In 3383 // this case, the ellipsis is parsed as part of the 3384 // abstract-declarator if the type of the parameter names a template 3385 // parameter pack that has not been expanded; otherwise, it is parsed 3386 // as part of the parameter-declaration-clause. 3387 if (Tok.is(tok::ellipsis) && 3388 !((D.getContext() == Declarator::PrototypeContext || 3389 D.getContext() == Declarator::BlockLiteralContext) && 3390 NextToken().is(tok::r_paren) && 3391 !Actions.containsUnexpandedParameterPacks(D))) 3392 D.setEllipsisLoc(ConsumeToken()); 3393 3394 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) || 3395 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) { 3396 // We found something that indicates the start of an unqualified-id. 3397 // Parse that unqualified-id. 3398 bool AllowConstructorName; 3399 if (D.getDeclSpec().hasTypeSpecifier()) 3400 AllowConstructorName = false; 3401 else if (D.getCXXScopeSpec().isSet()) 3402 AllowConstructorName = 3403 (D.getContext() == Declarator::FileContext || 3404 (D.getContext() == Declarator::MemberContext && 3405 D.getDeclSpec().isFriendSpecified())); 3406 else 3407 AllowConstructorName = (D.getContext() == Declarator::MemberContext); 3408 3409 if (ParseUnqualifiedId(D.getCXXScopeSpec(), 3410 /*EnteringContext=*/true, 3411 /*AllowDestructorName=*/true, 3412 AllowConstructorName, 3413 ParsedType(), 3414 D.getName()) || 3415 // Once we're past the identifier, if the scope was bad, mark the 3416 // whole declarator bad. 3417 D.getCXXScopeSpec().isInvalid()) { 3418 D.SetIdentifier(0, Tok.getLocation()); 3419 D.setInvalidType(true); 3420 } else { 3421 // Parsed the unqualified-id; update range information and move along. 3422 if (D.getSourceRange().getBegin().isInvalid()) 3423 D.SetRangeBegin(D.getName().getSourceRange().getBegin()); 3424 D.SetRangeEnd(D.getName().getSourceRange().getEnd()); 3425 } 3426 goto PastIdentifier; 3427 } 3428 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 3429 assert(!getLang().CPlusPlus && 3430 "There's a C++-specific check for tok::identifier above"); 3431 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 3432 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 3433 ConsumeToken(); 3434 goto PastIdentifier; 3435 } 3436 3437 if (Tok.is(tok::l_paren)) { 3438 // direct-declarator: '(' declarator ')' 3439 // direct-declarator: '(' attributes declarator ')' 3440 // Example: 'char (*X)' or 'int (*XX)(void)' 3441 ParseParenDeclarator(D); 3442 3443 // If the declarator was parenthesized, we entered the declarator 3444 // scope when parsing the parenthesized declarator, then exited 3445 // the scope already. Re-enter the scope, if we need to. 3446 if (D.getCXXScopeSpec().isSet()) { 3447 // If there was an error parsing parenthesized declarator, declarator 3448 // scope may have been enterred before. Don't do it again. 3449 if (!D.isInvalidType() && 3450 Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec())) 3451 // Change the declaration context for name lookup, until this function 3452 // is exited (and the declarator has been parsed). 3453 DeclScopeObj.EnterDeclaratorScope(); 3454 } 3455 } else if (D.mayOmitIdentifier()) { 3456 // This could be something simple like "int" (in which case the declarator 3457 // portion is empty), if an abstract-declarator is allowed. 3458 D.SetIdentifier(0, Tok.getLocation()); 3459 } else { 3460 if (D.getContext() == Declarator::MemberContext) 3461 Diag(Tok, diag::err_expected_member_name_or_semi) 3462 << D.getDeclSpec().getSourceRange(); 3463 else if (getLang().CPlusPlus) 3464 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus; 3465 else 3466 Diag(Tok, diag::err_expected_ident_lparen); 3467 D.SetIdentifier(0, Tok.getLocation()); 3468 D.setInvalidType(true); 3469 } 3470 3471 PastIdentifier: 3472 assert(D.isPastIdentifier() && 3473 "Haven't past the location of the identifier yet?"); 3474 3475 // Don't parse attributes unless we have an identifier. 3476 if (D.getIdentifier()) 3477 MaybeParseCXX0XAttributes(D); 3478 3479 while (1) { 3480 if (Tok.is(tok::l_paren)) { 3481 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 3482 // In such a case, check if we actually have a function declarator; if it 3483 // is not, the declarator has been fully parsed. 3484 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 3485 // When not in file scope, warn for ambiguous function declarators, just 3486 // in case the author intended it as a variable definition. 3487 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 3488 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 3489 break; 3490 } 3491 ParsedAttributes attrs(AttrFactory); 3492 ParseFunctionDeclarator(ConsumeParen(), D, attrs); 3493 } else if (Tok.is(tok::l_square)) { 3494 ParseBracketDeclarator(D); 3495 } else { 3496 break; 3497 } 3498 } 3499} 3500 3501/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 3502/// only called before the identifier, so these are most likely just grouping 3503/// parens for precedence. If we find that these are actually function 3504/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 3505/// 3506/// direct-declarator: 3507/// '(' declarator ')' 3508/// [GNU] '(' attributes declarator ')' 3509/// direct-declarator '(' parameter-type-list ')' 3510/// direct-declarator '(' identifier-list[opt] ')' 3511/// [GNU] direct-declarator '(' parameter-forward-declarations 3512/// parameter-type-list[opt] ')' 3513/// 3514void Parser::ParseParenDeclarator(Declarator &D) { 3515 SourceLocation StartLoc = ConsumeParen(); 3516 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 3517 3518 // Eat any attributes before we look at whether this is a grouping or function 3519 // declarator paren. If this is a grouping paren, the attribute applies to 3520 // the type being built up, for example: 3521 // int (__attribute__(()) *x)(long y) 3522 // If this ends up not being a grouping paren, the attribute applies to the 3523 // first argument, for example: 3524 // int (__attribute__(()) int x) 3525 // In either case, we need to eat any attributes to be able to determine what 3526 // sort of paren this is. 3527 // 3528 ParsedAttributes attrs(AttrFactory); 3529 bool RequiresArg = false; 3530 if (Tok.is(tok::kw___attribute)) { 3531 ParseGNUAttributes(attrs); 3532 3533 // We require that the argument list (if this is a non-grouping paren) be 3534 // present even if the attribute list was empty. 3535 RequiresArg = true; 3536 } 3537 // Eat any Microsoft extensions. 3538 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 3539 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___fastcall) || 3540 Tok.is(tok::kw___w64) || Tok.is(tok::kw___ptr64)) { 3541 ParseMicrosoftTypeAttributes(attrs); 3542 } 3543 // Eat any Borland extensions. 3544 if (Tok.is(tok::kw___pascal)) 3545 ParseBorlandTypeAttributes(attrs); 3546 3547 // If we haven't past the identifier yet (or where the identifier would be 3548 // stored, if this is an abstract declarator), then this is probably just 3549 // grouping parens. However, if this could be an abstract-declarator, then 3550 // this could also be the start of function arguments (consider 'void()'). 3551 bool isGrouping; 3552 3553 if (!D.mayOmitIdentifier()) { 3554 // If this can't be an abstract-declarator, this *must* be a grouping 3555 // paren, because we haven't seen the identifier yet. 3556 isGrouping = true; 3557 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 3558 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 3559 isDeclarationSpecifier()) { // 'int(int)' is a function. 3560 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 3561 // considered to be a type, not a K&R identifier-list. 3562 isGrouping = false; 3563 } else { 3564 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 3565 isGrouping = true; 3566 } 3567 3568 // If this is a grouping paren, handle: 3569 // direct-declarator: '(' declarator ')' 3570 // direct-declarator: '(' attributes declarator ')' 3571 if (isGrouping) { 3572 bool hadGroupingParens = D.hasGroupingParens(); 3573 D.setGroupingParens(true); 3574 3575 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 3576 // Match the ')'. 3577 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_paren, StartLoc); 3578 D.AddTypeInfo(DeclaratorChunk::getParen(StartLoc, EndLoc), 3579 attrs, EndLoc); 3580 3581 D.setGroupingParens(hadGroupingParens); 3582 return; 3583 } 3584 3585 // Okay, if this wasn't a grouping paren, it must be the start of a function 3586 // argument list. Recognize that this declarator will never have an 3587 // identifier (and remember where it would have been), then call into 3588 // ParseFunctionDeclarator to handle of argument list. 3589 D.SetIdentifier(0, Tok.getLocation()); 3590 3591 ParseFunctionDeclarator(StartLoc, D, attrs, RequiresArg); 3592} 3593 3594/// ParseFunctionDeclarator - We are after the identifier and have parsed the 3595/// declarator D up to a paren, which indicates that we are parsing function 3596/// arguments. 3597/// 3598/// If AttrList is non-null, then the caller parsed those arguments immediately 3599/// after the open paren - they should be considered to be the first argument of 3600/// a parameter. If RequiresArg is true, then the first argument of the 3601/// function is required to be present and required to not be an identifier 3602/// list. 3603/// 3604/// This method also handles this portion of the grammar: 3605/// parameter-type-list: [C99 6.7.5] 3606/// parameter-list 3607/// parameter-list ',' '...' 3608/// [C++] parameter-list '...' 3609/// 3610/// parameter-list: [C99 6.7.5] 3611/// parameter-declaration 3612/// parameter-list ',' parameter-declaration 3613/// 3614/// parameter-declaration: [C99 6.7.5] 3615/// declaration-specifiers declarator 3616/// [C++] declaration-specifiers declarator '=' assignment-expression 3617/// [GNU] declaration-specifiers declarator attributes 3618/// declaration-specifiers abstract-declarator[opt] 3619/// [C++] declaration-specifiers abstract-declarator[opt] 3620/// '=' assignment-expression 3621/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 3622/// 3623/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]", 3624/// C++0x "ref-qualifier[opt]" and "exception-specification[opt]". 3625/// 3626/// [C++0x] exception-specification: 3627/// dynamic-exception-specification 3628/// noexcept-specification 3629/// 3630void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 3631 ParsedAttributes &attrs, 3632 bool RequiresArg) { 3633 // lparen is already consumed! 3634 assert(D.isPastIdentifier() && "Should not call before identifier!"); 3635 3636 ParsedType TrailingReturnType; 3637 3638 // This parameter list may be empty. 3639 if (Tok.is(tok::r_paren)) { 3640 if (RequiresArg) 3641 Diag(Tok, diag::err_argument_required_after_attribute); 3642 3643 SourceLocation EndLoc = ConsumeParen(); // Eat the closing ')'. 3644 3645 // cv-qualifier-seq[opt]. 3646 DeclSpec DS(AttrFactory); 3647 SourceLocation RefQualifierLoc; 3648 bool RefQualifierIsLValueRef = true; 3649 ExceptionSpecificationType ESpecType = EST_None; 3650 SourceRange ESpecRange; 3651 llvm::SmallVector<ParsedType, 2> DynamicExceptions; 3652 llvm::SmallVector<SourceRange, 2> DynamicExceptionRanges; 3653 ExprResult NoexceptExpr; 3654 if (getLang().CPlusPlus) { 3655 MaybeParseCXX0XAttributes(attrs); 3656 3657 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3658 if (!DS.getSourceRange().getEnd().isInvalid()) 3659 EndLoc = DS.getSourceRange().getEnd(); 3660 3661 // Parse ref-qualifier[opt] 3662 if (Tok.is(tok::amp) || Tok.is(tok::ampamp)) { 3663 if (!getLang().CPlusPlus0x) 3664 Diag(Tok, diag::ext_ref_qualifier); 3665 3666 RefQualifierIsLValueRef = Tok.is(tok::amp); 3667 RefQualifierLoc = ConsumeToken(); 3668 EndLoc = RefQualifierLoc; 3669 } 3670 3671 // Parse exception-specification[opt]. 3672 ESpecType = MaybeParseExceptionSpecification(ESpecRange, 3673 DynamicExceptions, 3674 DynamicExceptionRanges, 3675 NoexceptExpr); 3676 if (ESpecType != EST_None) 3677 EndLoc = ESpecRange.getEnd(); 3678 3679 // Parse trailing-return-type. 3680 if (getLang().CPlusPlus0x && Tok.is(tok::arrow)) { 3681 TrailingReturnType = ParseTrailingReturnType().get(); 3682 } 3683 } 3684 3685 // Remember that we parsed a function type, and remember the attributes. 3686 // int() -> no prototype, no '...'. 3687 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 3688 /*variadic*/ false, 3689 SourceLocation(), 3690 /*arglist*/ 0, 0, 3691 DS.getTypeQualifiers(), 3692 RefQualifierIsLValueRef, 3693 RefQualifierLoc, 3694 ESpecType, ESpecRange.getBegin(), 3695 DynamicExceptions.data(), 3696 DynamicExceptionRanges.data(), 3697 DynamicExceptions.size(), 3698 NoexceptExpr.isUsable() ? 3699 NoexceptExpr.get() : 0, 3700 LParenLoc, EndLoc, D, 3701 TrailingReturnType), 3702 attrs, EndLoc); 3703 return; 3704 } 3705 3706 // Alternatively, this parameter list may be an identifier list form for a 3707 // K&R-style function: void foo(a,b,c) 3708 if (!getLang().CPlusPlus && Tok.is(tok::identifier) 3709 && !TryAltiVecVectorToken()) { 3710 if (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename)) { 3711 // K&R identifier lists can't have typedefs as identifiers, per 3712 // C99 6.7.5.3p11. 3713 if (RequiresArg) 3714 Diag(Tok, diag::err_argument_required_after_attribute); 3715 3716 // Identifier list. Note that '(' identifier-list ')' is only allowed for 3717 // normal declarators, not for abstract-declarators. Get the first 3718 // identifier. 3719 Token FirstTok = Tok; 3720 ConsumeToken(); // eat the first identifier. 3721 3722 // Identifier lists follow a really simple grammar: the identifiers can 3723 // be followed *only* by a ", moreidentifiers" or ")". However, K&R 3724 // identifier lists are really rare in the brave new modern world, and it 3725 // is very common for someone to typo a type in a non-k&r style list. If 3726 // we are presented with something like: "void foo(intptr x, float y)", 3727 // we don't want to start parsing the function declarator as though it is 3728 // a K&R style declarator just because intptr is an invalid type. 3729 // 3730 // To handle this, we check to see if the token after the first identifier 3731 // is a "," or ")". Only if so, do we parse it as an identifier list. 3732 if (Tok.is(tok::comma) || Tok.is(tok::r_paren)) 3733 return ParseFunctionDeclaratorIdentifierList(LParenLoc, 3734 FirstTok.getIdentifierInfo(), 3735 FirstTok.getLocation(), D); 3736 3737 // If we get here, the code is invalid. Push the first identifier back 3738 // into the token stream and parse the first argument as an (invalid) 3739 // normal argument declarator. 3740 PP.EnterToken(Tok); 3741 Tok = FirstTok; 3742 } 3743 } 3744 3745 // Finally, a normal, non-empty parameter type list. 3746 3747 // Build up an array of information about the parsed arguments. 3748 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3749 3750 // Enter function-declaration scope, limiting any declarators to the 3751 // function prototype scope, including parameter declarators. 3752 ParseScope PrototypeScope(this, 3753 Scope::FunctionPrototypeScope|Scope::DeclScope); 3754 3755 bool IsVariadic = false; 3756 SourceLocation EllipsisLoc; 3757 while (1) { 3758 if (Tok.is(tok::ellipsis)) { 3759 IsVariadic = true; 3760 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3761 break; 3762 } 3763 3764 // Parse the declaration-specifiers. 3765 // Just use the ParsingDeclaration "scope" of the declarator. 3766 DeclSpec DS(AttrFactory); 3767 3768 // Skip any Microsoft attributes before a param. 3769 if (getLang().Microsoft && Tok.is(tok::l_square)) 3770 ParseMicrosoftAttributes(DS.getAttributes()); 3771 3772 SourceLocation DSStart = Tok.getLocation(); 3773 3774 // If the caller parsed attributes for the first argument, add them now. 3775 // Take them so that we only apply the attributes to the first parameter. 3776 DS.takeAttributesFrom(attrs); 3777 3778 ParseDeclarationSpecifiers(DS); 3779 3780 // Parse the declarator. This is "PrototypeContext", because we must 3781 // accept either 'declarator' or 'abstract-declarator' here. 3782 Declarator ParmDecl(DS, Declarator::PrototypeContext); 3783 ParseDeclarator(ParmDecl); 3784 3785 // Parse GNU attributes, if present. 3786 MaybeParseGNUAttributes(ParmDecl); 3787 3788 // Remember this parsed parameter in ParamInfo. 3789 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 3790 3791 // DefArgToks is used when the parsing of default arguments needs 3792 // to be delayed. 3793 CachedTokens *DefArgToks = 0; 3794 3795 // If no parameter was specified, verify that *something* was specified, 3796 // otherwise we have a missing type and identifier. 3797 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 3798 ParmDecl.getNumTypeObjects() == 0) { 3799 // Completely missing, emit error. 3800 Diag(DSStart, diag::err_missing_param); 3801 } else { 3802 // Otherwise, we have something. Add it and let semantic analysis try 3803 // to grok it and add the result to the ParamInfo we are building. 3804 3805 // Inform the actions module about the parameter declarator, so it gets 3806 // added to the current scope. 3807 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl); 3808 3809 // Parse the default argument, if any. We parse the default 3810 // arguments in all dialects; the semantic analysis in 3811 // ActOnParamDefaultArgument will reject the default argument in 3812 // C. 3813 if (Tok.is(tok::equal)) { 3814 SourceLocation EqualLoc = Tok.getLocation(); 3815 3816 // Parse the default argument 3817 if (D.getContext() == Declarator::MemberContext) { 3818 // If we're inside a class definition, cache the tokens 3819 // corresponding to the default argument. We'll actually parse 3820 // them when we see the end of the class definition. 3821 // FIXME: Templates will require something similar. 3822 // FIXME: Can we use a smart pointer for Toks? 3823 DefArgToks = new CachedTokens; 3824 3825 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 3826 /*StopAtSemi=*/true, 3827 /*ConsumeFinalToken=*/false)) { 3828 delete DefArgToks; 3829 DefArgToks = 0; 3830 Actions.ActOnParamDefaultArgumentError(Param); 3831 } else { 3832 // Mark the end of the default argument so that we know when to 3833 // stop when we parse it later on. 3834 Token DefArgEnd; 3835 DefArgEnd.startToken(); 3836 DefArgEnd.setKind(tok::cxx_defaultarg_end); 3837 DefArgEnd.setLocation(Tok.getLocation()); 3838 DefArgToks->push_back(DefArgEnd); 3839 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 3840 (*DefArgToks)[1].getLocation()); 3841 } 3842 } else { 3843 // Consume the '='. 3844 ConsumeToken(); 3845 3846 // The argument isn't actually potentially evaluated unless it is 3847 // used. 3848 EnterExpressionEvaluationContext Eval(Actions, 3849 Sema::PotentiallyEvaluatedIfUsed); 3850 3851 ExprResult DefArgResult(ParseAssignmentExpression()); 3852 if (DefArgResult.isInvalid()) { 3853 Actions.ActOnParamDefaultArgumentError(Param); 3854 SkipUntil(tok::comma, tok::r_paren, true, true); 3855 } else { 3856 // Inform the actions module about the default argument 3857 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 3858 DefArgResult.take()); 3859 } 3860 } 3861 } 3862 3863 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3864 ParmDecl.getIdentifierLoc(), Param, 3865 DefArgToks)); 3866 } 3867 3868 // If the next token is a comma, consume it and keep reading arguments. 3869 if (Tok.isNot(tok::comma)) { 3870 if (Tok.is(tok::ellipsis)) { 3871 IsVariadic = true; 3872 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3873 3874 if (!getLang().CPlusPlus) { 3875 // We have ellipsis without a preceding ',', which is ill-formed 3876 // in C. Complain and provide the fix. 3877 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 3878 << FixItHint::CreateInsertion(EllipsisLoc, ", "); 3879 } 3880 } 3881 3882 break; 3883 } 3884 3885 // Consume the comma. 3886 ConsumeToken(); 3887 } 3888 3889 // If we have the closing ')', eat it. 3890 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3891 3892 DeclSpec DS(AttrFactory); 3893 SourceLocation RefQualifierLoc; 3894 bool RefQualifierIsLValueRef = true; 3895 ExceptionSpecificationType ESpecType = EST_None; 3896 SourceRange ESpecRange; 3897 llvm::SmallVector<ParsedType, 2> DynamicExceptions; 3898 llvm::SmallVector<SourceRange, 2> DynamicExceptionRanges; 3899 ExprResult NoexceptExpr; 3900 3901 if (getLang().CPlusPlus) { 3902 MaybeParseCXX0XAttributes(attrs); 3903 3904 // Parse cv-qualifier-seq[opt]. 3905 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3906 if (!DS.getSourceRange().getEnd().isInvalid()) 3907 EndLoc = DS.getSourceRange().getEnd(); 3908 3909 // Parse ref-qualifier[opt] 3910 if (Tok.is(tok::amp) || Tok.is(tok::ampamp)) { 3911 if (!getLang().CPlusPlus0x) 3912 Diag(Tok, diag::ext_ref_qualifier); 3913 3914 RefQualifierIsLValueRef = Tok.is(tok::amp); 3915 RefQualifierLoc = ConsumeToken(); 3916 EndLoc = RefQualifierLoc; 3917 } 3918 3919 // FIXME: We should leave the prototype scope before parsing the exception 3920 // specification, and then reenter it when parsing the trailing return type. 3921 // FIXMEFIXME: Why? That wouldn't be right for the noexcept clause. 3922 3923 // Parse exception-specification[opt]. 3924 ESpecType = MaybeParseExceptionSpecification(ESpecRange, 3925 DynamicExceptions, 3926 DynamicExceptionRanges, 3927 NoexceptExpr); 3928 if (ESpecType != EST_None) 3929 EndLoc = ESpecRange.getEnd(); 3930 3931 // Parse trailing-return-type. 3932 if (getLang().CPlusPlus0x && Tok.is(tok::arrow)) { 3933 TrailingReturnType = ParseTrailingReturnType().get(); 3934 } 3935 } 3936 3937 // Leave prototype scope. 3938 PrototypeScope.Exit(); 3939 3940 // Remember that we parsed a function type, and remember the attributes. 3941 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 3942 EllipsisLoc, 3943 ParamInfo.data(), ParamInfo.size(), 3944 DS.getTypeQualifiers(), 3945 RefQualifierIsLValueRef, 3946 RefQualifierLoc, 3947 ESpecType, ESpecRange.getBegin(), 3948 DynamicExceptions.data(), 3949 DynamicExceptionRanges.data(), 3950 DynamicExceptions.size(), 3951 NoexceptExpr.isUsable() ? 3952 NoexceptExpr.get() : 0, 3953 LParenLoc, EndLoc, D, 3954 TrailingReturnType), 3955 attrs, EndLoc); 3956} 3957 3958/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 3959/// we found a K&R-style identifier list instead of a type argument list. The 3960/// first identifier has already been consumed, and the current token is the 3961/// token right after it. 3962/// 3963/// identifier-list: [C99 6.7.5] 3964/// identifier 3965/// identifier-list ',' identifier 3966/// 3967void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 3968 IdentifierInfo *FirstIdent, 3969 SourceLocation FirstIdentLoc, 3970 Declarator &D) { 3971 // Build up an array of information about the parsed arguments. 3972 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3973 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 3974 3975 // If there was no identifier specified for the declarator, either we are in 3976 // an abstract-declarator, or we are in a parameter declarator which was found 3977 // to be abstract. In abstract-declarators, identifier lists are not valid: 3978 // diagnose this. 3979 if (!D.getIdentifier()) 3980 Diag(FirstIdentLoc, diag::ext_ident_list_in_param); 3981 3982 // The first identifier was already read, and is known to be the first 3983 // identifier in the list. Remember this identifier in ParamInfo. 3984 ParamsSoFar.insert(FirstIdent); 3985 ParamInfo.push_back(DeclaratorChunk::ParamInfo(FirstIdent, FirstIdentLoc, 0)); 3986 3987 while (Tok.is(tok::comma)) { 3988 // Eat the comma. 3989 ConsumeToken(); 3990 3991 // If this isn't an identifier, report the error and skip until ')'. 3992 if (Tok.isNot(tok::identifier)) { 3993 Diag(Tok, diag::err_expected_ident); 3994 SkipUntil(tok::r_paren); 3995 return; 3996 } 3997 3998 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 3999 4000 // Reject 'typedef int y; int test(x, y)', but continue parsing. 4001 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope())) 4002 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 4003 4004 // Verify that the argument identifier has not already been mentioned. 4005 if (!ParamsSoFar.insert(ParmII)) { 4006 Diag(Tok, diag::err_param_redefinition) << ParmII; 4007 } else { 4008 // Remember this identifier in ParamInfo. 4009 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 4010 Tok.getLocation(), 4011 0)); 4012 } 4013 4014 // Eat the identifier. 4015 ConsumeToken(); 4016 } 4017 4018 // If we have the closing ')', eat it and we're done. 4019 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 4020 4021 // Remember that we parsed a function type, and remember the attributes. This 4022 // function type is always a K&R style function type, which is not varargs and 4023 // has no prototype. 4024 ParsedAttributes attrs(AttrFactory); 4025 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 4026 SourceLocation(), 4027 &ParamInfo[0], ParamInfo.size(), 4028 /*TypeQuals*/0, 4029 true, SourceLocation(), 4030 EST_None, SourceLocation(), 0, 0, 4031 0, 0, LParenLoc, RLoc, D), 4032 attrs, RLoc); 4033} 4034 4035/// [C90] direct-declarator '[' constant-expression[opt] ']' 4036/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 4037/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 4038/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 4039/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 4040void Parser::ParseBracketDeclarator(Declarator &D) { 4041 SourceLocation StartLoc = ConsumeBracket(); 4042 4043 // C array syntax has many features, but by-far the most common is [] and [4]. 4044 // This code does a fast path to handle some of the most obvious cases. 4045 if (Tok.getKind() == tok::r_square) { 4046 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 4047 ParsedAttributes attrs(AttrFactory); 4048 MaybeParseCXX0XAttributes(attrs); 4049 4050 // Remember that we parsed the empty array type. 4051 ExprResult NumElements; 4052 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 4053 StartLoc, EndLoc), 4054 attrs, EndLoc); 4055 return; 4056 } else if (Tok.getKind() == tok::numeric_constant && 4057 GetLookAheadToken(1).is(tok::r_square)) { 4058 // [4] is very common. Parse the numeric constant expression. 4059 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 4060 ConsumeToken(); 4061 4062 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 4063 ParsedAttributes attrs(AttrFactory); 4064 MaybeParseCXX0XAttributes(attrs); 4065 4066 // Remember that we parsed a array type, and remember its features. 4067 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, 4068 ExprRes.release(), 4069 StartLoc, EndLoc), 4070 attrs, EndLoc); 4071 return; 4072 } 4073 4074 // If valid, this location is the position where we read the 'static' keyword. 4075 SourceLocation StaticLoc; 4076 if (Tok.is(tok::kw_static)) 4077 StaticLoc = ConsumeToken(); 4078 4079 // If there is a type-qualifier-list, read it now. 4080 // Type qualifiers in an array subscript are a C99 feature. 4081 DeclSpec DS(AttrFactory); 4082 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 4083 4084 // If we haven't already read 'static', check to see if there is one after the 4085 // type-qualifier-list. 4086 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 4087 StaticLoc = ConsumeToken(); 4088 4089 // Handle "direct-declarator [ type-qual-list[opt] * ]". 4090 bool isStar = false; 4091 ExprResult NumElements; 4092 4093 // Handle the case where we have '[*]' as the array size. However, a leading 4094 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 4095 // the the token after the star is a ']'. Since stars in arrays are 4096 // infrequent, use of lookahead is not costly here. 4097 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 4098 ConsumeToken(); // Eat the '*'. 4099 4100 if (StaticLoc.isValid()) { 4101 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 4102 StaticLoc = SourceLocation(); // Drop the static. 4103 } 4104 isStar = true; 4105 } else if (Tok.isNot(tok::r_square)) { 4106 // Note, in C89, this production uses the constant-expr production instead 4107 // of assignment-expr. The only difference is that assignment-expr allows 4108 // things like '=' and '*='. Sema rejects these in C89 mode because they 4109 // are not i-c-e's, so we don't need to distinguish between the two here. 4110 4111 // Parse the constant-expression or assignment-expression now (depending 4112 // on dialect). 4113 if (getLang().CPlusPlus) 4114 NumElements = ParseConstantExpression(); 4115 else 4116 NumElements = ParseAssignmentExpression(); 4117 } 4118 4119 // If there was an error parsing the assignment-expression, recover. 4120 if (NumElements.isInvalid()) { 4121 D.setInvalidType(true); 4122 // If the expression was invalid, skip it. 4123 SkipUntil(tok::r_square); 4124 return; 4125 } 4126 4127 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 4128 4129 ParsedAttributes attrs(AttrFactory); 4130 MaybeParseCXX0XAttributes(attrs); 4131 4132 // Remember that we parsed a array type, and remember its features. 4133 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 4134 StaticLoc.isValid(), isStar, 4135 NumElements.release(), 4136 StartLoc, EndLoc), 4137 attrs, EndLoc); 4138} 4139 4140/// [GNU] typeof-specifier: 4141/// typeof ( expressions ) 4142/// typeof ( type-name ) 4143/// [GNU/C++] typeof unary-expression 4144/// 4145void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 4146 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 4147 Token OpTok = Tok; 4148 SourceLocation StartLoc = ConsumeToken(); 4149 4150 const bool hasParens = Tok.is(tok::l_paren); 4151 4152 bool isCastExpr; 4153 ParsedType CastTy; 4154 SourceRange CastRange; 4155 ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr, 4156 CastTy, CastRange); 4157 if (hasParens) 4158 DS.setTypeofParensRange(CastRange); 4159 4160 if (CastRange.getEnd().isInvalid()) 4161 // FIXME: Not accurate, the range gets one token more than it should. 4162 DS.SetRangeEnd(Tok.getLocation()); 4163 else 4164 DS.SetRangeEnd(CastRange.getEnd()); 4165 4166 if (isCastExpr) { 4167 if (!CastTy) { 4168 DS.SetTypeSpecError(); 4169 return; 4170 } 4171 4172 const char *PrevSpec = 0; 4173 unsigned DiagID; 4174 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 4175 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 4176 DiagID, CastTy)) 4177 Diag(StartLoc, DiagID) << PrevSpec; 4178 return; 4179 } 4180 4181 // If we get here, the operand to the typeof was an expresion. 4182 if (Operand.isInvalid()) { 4183 DS.SetTypeSpecError(); 4184 return; 4185 } 4186 4187 const char *PrevSpec = 0; 4188 unsigned DiagID; 4189 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 4190 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 4191 DiagID, Operand.get())) 4192 Diag(StartLoc, DiagID) << PrevSpec; 4193} 4194 4195 4196/// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called 4197/// from TryAltiVecVectorToken. 4198bool Parser::TryAltiVecVectorTokenOutOfLine() { 4199 Token Next = NextToken(); 4200 switch (Next.getKind()) { 4201 default: return false; 4202 case tok::kw_short: 4203 case tok::kw_long: 4204 case tok::kw_signed: 4205 case tok::kw_unsigned: 4206 case tok::kw_void: 4207 case tok::kw_char: 4208 case tok::kw_int: 4209 case tok::kw_float: 4210 case tok::kw_double: 4211 case tok::kw_bool: 4212 case tok::kw___pixel: 4213 Tok.setKind(tok::kw___vector); 4214 return true; 4215 case tok::identifier: 4216 if (Next.getIdentifierInfo() == Ident_pixel) { 4217 Tok.setKind(tok::kw___vector); 4218 return true; 4219 } 4220 return false; 4221 } 4222} 4223 4224bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc, 4225 const char *&PrevSpec, unsigned &DiagID, 4226 bool &isInvalid) { 4227 if (Tok.getIdentifierInfo() == Ident_vector) { 4228 Token Next = NextToken(); 4229 switch (Next.getKind()) { 4230 case tok::kw_short: 4231 case tok::kw_long: 4232 case tok::kw_signed: 4233 case tok::kw_unsigned: 4234 case tok::kw_void: 4235 case tok::kw_char: 4236 case tok::kw_int: 4237 case tok::kw_float: 4238 case tok::kw_double: 4239 case tok::kw_bool: 4240 case tok::kw___pixel: 4241 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 4242 return true; 4243 case tok::identifier: 4244 if (Next.getIdentifierInfo() == Ident_pixel) { 4245 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 4246 return true; 4247 } 4248 break; 4249 default: 4250 break; 4251 } 4252 } else if ((Tok.getIdentifierInfo() == Ident_pixel) && 4253 DS.isTypeAltiVecVector()) { 4254 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 4255 return true; 4256 } 4257 return false; 4258} 4259