ParseTemplate.cpp revision 226890
1//===--- ParseTemplate.cpp - Template 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 parsing of C++ templates. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Parse/Parser.h" 15#include "clang/Parse/ParseDiagnostic.h" 16#include "clang/Sema/DeclSpec.h" 17#include "clang/Sema/ParsedTemplate.h" 18#include "clang/Sema/Scope.h" 19#include "RAIIObjectsForParser.h" 20#include "clang/AST/DeclTemplate.h" 21#include "clang/AST/ASTConsumer.h" 22using namespace clang; 23 24/// \brief Parse a template declaration, explicit instantiation, or 25/// explicit specialization. 26Decl * 27Parser::ParseDeclarationStartingWithTemplate(unsigned Context, 28 SourceLocation &DeclEnd, 29 AccessSpecifier AS, 30 AttributeList *AccessAttrs) { 31 ObjCDeclContextSwitch ObjCDC(*this); 32 33 if (Tok.is(tok::kw_template) && NextToken().isNot(tok::less)) { 34 return ParseExplicitInstantiation(SourceLocation(), ConsumeToken(), 35 DeclEnd); 36 } 37 return ParseTemplateDeclarationOrSpecialization(Context, DeclEnd, AS, 38 AccessAttrs); 39} 40 41/// \brief RAII class that manages the template parameter depth. 42namespace { 43 class TemplateParameterDepthCounter { 44 unsigned &Depth; 45 unsigned AddedLevels; 46 47 public: 48 explicit TemplateParameterDepthCounter(unsigned &Depth) 49 : Depth(Depth), AddedLevels(0) { } 50 51 ~TemplateParameterDepthCounter() { 52 Depth -= AddedLevels; 53 } 54 55 void operator++() { 56 ++Depth; 57 ++AddedLevels; 58 } 59 60 operator unsigned() const { return Depth; } 61 }; 62} 63 64/// \brief Parse a template declaration or an explicit specialization. 65/// 66/// Template declarations include one or more template parameter lists 67/// and either the function or class template declaration. Explicit 68/// specializations contain one or more 'template < >' prefixes 69/// followed by a (possibly templated) declaration. Since the 70/// syntactic form of both features is nearly identical, we parse all 71/// of the template headers together and let semantic analysis sort 72/// the declarations from the explicit specializations. 73/// 74/// template-declaration: [C++ temp] 75/// 'export'[opt] 'template' '<' template-parameter-list '>' declaration 76/// 77/// explicit-specialization: [ C++ temp.expl.spec] 78/// 'template' '<' '>' declaration 79Decl * 80Parser::ParseTemplateDeclarationOrSpecialization(unsigned Context, 81 SourceLocation &DeclEnd, 82 AccessSpecifier AS, 83 AttributeList *AccessAttrs) { 84 assert((Tok.is(tok::kw_export) || Tok.is(tok::kw_template)) && 85 "Token does not start a template declaration."); 86 87 // Enter template-parameter scope. 88 ParseScope TemplateParmScope(this, Scope::TemplateParamScope); 89 90 // Tell the action that names should be checked in the context of 91 // the declaration to come. 92 ParsingDeclRAIIObject ParsingTemplateParams(*this); 93 94 // Parse multiple levels of template headers within this template 95 // parameter scope, e.g., 96 // 97 // template<typename T> 98 // template<typename U> 99 // class A<T>::B { ... }; 100 // 101 // We parse multiple levels non-recursively so that we can build a 102 // single data structure containing all of the template parameter 103 // lists to easily differentiate between the case above and: 104 // 105 // template<typename T> 106 // class A { 107 // template<typename U> class B; 108 // }; 109 // 110 // In the first case, the action for declaring A<T>::B receives 111 // both template parameter lists. In the second case, the action for 112 // defining A<T>::B receives just the inner template parameter list 113 // (and retrieves the outer template parameter list from its 114 // context). 115 bool isSpecialization = true; 116 bool LastParamListWasEmpty = false; 117 TemplateParameterLists ParamLists; 118 TemplateParameterDepthCounter Depth(TemplateParameterDepth); 119 do { 120 // Consume the 'export', if any. 121 SourceLocation ExportLoc; 122 if (Tok.is(tok::kw_export)) { 123 ExportLoc = ConsumeToken(); 124 } 125 126 // Consume the 'template', which should be here. 127 SourceLocation TemplateLoc; 128 if (Tok.is(tok::kw_template)) { 129 TemplateLoc = ConsumeToken(); 130 } else { 131 Diag(Tok.getLocation(), diag::err_expected_template); 132 return 0; 133 } 134 135 // Parse the '<' template-parameter-list '>' 136 SourceLocation LAngleLoc, RAngleLoc; 137 SmallVector<Decl*, 4> TemplateParams; 138 if (ParseTemplateParameters(Depth, TemplateParams, LAngleLoc, 139 RAngleLoc)) { 140 // Skip until the semi-colon or a }. 141 SkipUntil(tok::r_brace, true, true); 142 if (Tok.is(tok::semi)) 143 ConsumeToken(); 144 return 0; 145 } 146 147 ParamLists.push_back( 148 Actions.ActOnTemplateParameterList(Depth, ExportLoc, 149 TemplateLoc, LAngleLoc, 150 TemplateParams.data(), 151 TemplateParams.size(), RAngleLoc)); 152 153 if (!TemplateParams.empty()) { 154 isSpecialization = false; 155 ++Depth; 156 } else { 157 LastParamListWasEmpty = true; 158 } 159 } while (Tok.is(tok::kw_export) || Tok.is(tok::kw_template)); 160 161 // Parse the actual template declaration. 162 return ParseSingleDeclarationAfterTemplate(Context, 163 ParsedTemplateInfo(&ParamLists, 164 isSpecialization, 165 LastParamListWasEmpty), 166 ParsingTemplateParams, 167 DeclEnd, AS, AccessAttrs); 168} 169 170/// \brief Parse a single declaration that declares a template, 171/// template specialization, or explicit instantiation of a template. 172/// 173/// \param TemplateParams if non-NULL, the template parameter lists 174/// that preceded this declaration. In this case, the declaration is a 175/// template declaration, out-of-line definition of a template, or an 176/// explicit template specialization. When NULL, the declaration is an 177/// explicit template instantiation. 178/// 179/// \param TemplateLoc when TemplateParams is NULL, the location of 180/// the 'template' keyword that indicates that we have an explicit 181/// template instantiation. 182/// 183/// \param DeclEnd will receive the source location of the last token 184/// within this declaration. 185/// 186/// \param AS the access specifier associated with this 187/// declaration. Will be AS_none for namespace-scope declarations. 188/// 189/// \returns the new declaration. 190Decl * 191Parser::ParseSingleDeclarationAfterTemplate( 192 unsigned Context, 193 const ParsedTemplateInfo &TemplateInfo, 194 ParsingDeclRAIIObject &DiagsFromTParams, 195 SourceLocation &DeclEnd, 196 AccessSpecifier AS, 197 AttributeList *AccessAttrs) { 198 assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate && 199 "Template information required"); 200 201 if (Context == Declarator::MemberContext) { 202 // We are parsing a member template. 203 ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo, 204 &DiagsFromTParams); 205 return 0; 206 } 207 208 ParsedAttributesWithRange prefixAttrs(AttrFactory); 209 MaybeParseCXX0XAttributes(prefixAttrs); 210 211 if (Tok.is(tok::kw_using)) 212 return ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd, 213 prefixAttrs); 214 215 // Parse the declaration specifiers, stealing the accumulated 216 // diagnostics from the template parameters. 217 ParsingDeclSpec DS(*this, &DiagsFromTParams); 218 219 DS.takeAttributesFrom(prefixAttrs); 220 221 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, 222 getDeclSpecContextFromDeclaratorContext(Context)); 223 224 if (Tok.is(tok::semi)) { 225 DeclEnd = ConsumeToken(); 226 Decl *Decl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS); 227 DS.complete(Decl); 228 return Decl; 229 } 230 231 // Parse the declarator. 232 ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context); 233 ParseDeclarator(DeclaratorInfo); 234 // Error parsing the declarator? 235 if (!DeclaratorInfo.hasName()) { 236 // If so, skip until the semi-colon or a }. 237 SkipUntil(tok::r_brace, true, true); 238 if (Tok.is(tok::semi)) 239 ConsumeToken(); 240 return 0; 241 } 242 243 // If we have a declaration or declarator list, handle it. 244 if (isDeclarationAfterDeclarator()) { 245 // Parse this declaration. 246 Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo, 247 TemplateInfo); 248 249 if (Tok.is(tok::comma)) { 250 Diag(Tok, diag::err_multiple_template_declarators) 251 << (int)TemplateInfo.Kind; 252 SkipUntil(tok::semi, true, false); 253 return ThisDecl; 254 } 255 256 // Eat the semi colon after the declaration. 257 ExpectAndConsume(tok::semi, diag::err_expected_semi_declaration); 258 DeclaratorInfo.complete(ThisDecl); 259 return ThisDecl; 260 } 261 262 if (DeclaratorInfo.isFunctionDeclarator() && 263 isStartOfFunctionDefinition(DeclaratorInfo)) { 264 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 265 Diag(Tok, diag::err_function_declared_typedef); 266 267 if (Tok.is(tok::l_brace)) { 268 // This recovery skips the entire function body. It would be nice 269 // to simply call ParseFunctionDefinition() below, however Sema 270 // assumes the declarator represents a function, not a typedef. 271 ConsumeBrace(); 272 SkipUntil(tok::r_brace, true); 273 } else { 274 SkipUntil(tok::semi); 275 } 276 return 0; 277 } 278 return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo); 279 } 280 281 if (DeclaratorInfo.isFunctionDeclarator()) 282 Diag(Tok, diag::err_expected_fn_body); 283 else 284 Diag(Tok, diag::err_invalid_token_after_toplevel_declarator); 285 SkipUntil(tok::semi); 286 return 0; 287} 288 289/// ParseTemplateParameters - Parses a template-parameter-list enclosed in 290/// angle brackets. Depth is the depth of this template-parameter-list, which 291/// is the number of template headers directly enclosing this template header. 292/// TemplateParams is the current list of template parameters we're building. 293/// The template parameter we parse will be added to this list. LAngleLoc and 294/// RAngleLoc will receive the positions of the '<' and '>', respectively, 295/// that enclose this template parameter list. 296/// 297/// \returns true if an error occurred, false otherwise. 298bool Parser::ParseTemplateParameters(unsigned Depth, 299 SmallVectorImpl<Decl*> &TemplateParams, 300 SourceLocation &LAngleLoc, 301 SourceLocation &RAngleLoc) { 302 // Get the template parameter list. 303 if (!Tok.is(tok::less)) { 304 Diag(Tok.getLocation(), diag::err_expected_less_after) << "template"; 305 return true; 306 } 307 LAngleLoc = ConsumeToken(); 308 309 // Try to parse the template parameter list. 310 if (Tok.is(tok::greater)) 311 RAngleLoc = ConsumeToken(); 312 else if (ParseTemplateParameterList(Depth, TemplateParams)) { 313 if (!Tok.is(tok::greater)) { 314 Diag(Tok.getLocation(), diag::err_expected_greater); 315 return true; 316 } 317 RAngleLoc = ConsumeToken(); 318 } 319 return false; 320} 321 322/// ParseTemplateParameterList - Parse a template parameter list. If 323/// the parsing fails badly (i.e., closing bracket was left out), this 324/// will try to put the token stream in a reasonable position (closing 325/// a statement, etc.) and return false. 326/// 327/// template-parameter-list: [C++ temp] 328/// template-parameter 329/// template-parameter-list ',' template-parameter 330bool 331Parser::ParseTemplateParameterList(unsigned Depth, 332 SmallVectorImpl<Decl*> &TemplateParams) { 333 while (1) { 334 if (Decl *TmpParam 335 = ParseTemplateParameter(Depth, TemplateParams.size())) { 336 TemplateParams.push_back(TmpParam); 337 } else { 338 // If we failed to parse a template parameter, skip until we find 339 // a comma or closing brace. 340 SkipUntil(tok::comma, tok::greater, true, true); 341 } 342 343 // Did we find a comma or the end of the template parmeter list? 344 if (Tok.is(tok::comma)) { 345 ConsumeToken(); 346 } else if (Tok.is(tok::greater)) { 347 // Don't consume this... that's done by template parser. 348 break; 349 } else { 350 // Somebody probably forgot to close the template. Skip ahead and 351 // try to get out of the expression. This error is currently 352 // subsumed by whatever goes on in ParseTemplateParameter. 353 // TODO: This could match >>, and it would be nice to avoid those 354 // silly errors with template <vec<T>>. 355 Diag(Tok.getLocation(), diag::err_expected_comma_greater); 356 SkipUntil(tok::greater, true, true); 357 return false; 358 } 359 } 360 return true; 361} 362 363/// \brief Determine whether the parser is at the start of a template 364/// type parameter. 365bool Parser::isStartOfTemplateTypeParameter() { 366 if (Tok.is(tok::kw_class)) { 367 // "class" may be the start of an elaborated-type-specifier or a 368 // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter. 369 switch (NextToken().getKind()) { 370 case tok::equal: 371 case tok::comma: 372 case tok::greater: 373 case tok::greatergreater: 374 case tok::ellipsis: 375 return true; 376 377 case tok::identifier: 378 // This may be either a type-parameter or an elaborated-type-specifier. 379 // We have to look further. 380 break; 381 382 default: 383 return false; 384 } 385 386 switch (GetLookAheadToken(2).getKind()) { 387 case tok::equal: 388 case tok::comma: 389 case tok::greater: 390 case tok::greatergreater: 391 return true; 392 393 default: 394 return false; 395 } 396 } 397 398 if (Tok.isNot(tok::kw_typename)) 399 return false; 400 401 // C++ [temp.param]p2: 402 // There is no semantic difference between class and typename in a 403 // template-parameter. typename followed by an unqualified-id 404 // names a template type parameter. typename followed by a 405 // qualified-id denotes the type in a non-type 406 // parameter-declaration. 407 Token Next = NextToken(); 408 409 // If we have an identifier, skip over it. 410 if (Next.getKind() == tok::identifier) 411 Next = GetLookAheadToken(2); 412 413 switch (Next.getKind()) { 414 case tok::equal: 415 case tok::comma: 416 case tok::greater: 417 case tok::greatergreater: 418 case tok::ellipsis: 419 return true; 420 421 default: 422 return false; 423 } 424} 425 426/// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]). 427/// 428/// template-parameter: [C++ temp.param] 429/// type-parameter 430/// parameter-declaration 431/// 432/// type-parameter: (see below) 433/// 'class' ...[opt] identifier[opt] 434/// 'class' identifier[opt] '=' type-id 435/// 'typename' ...[opt] identifier[opt] 436/// 'typename' identifier[opt] '=' type-id 437/// 'template' '<' template-parameter-list '>' 438/// 'class' ...[opt] identifier[opt] 439/// 'template' '<' template-parameter-list '>' 'class' identifier[opt] 440/// = id-expression 441Decl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) { 442 if (isStartOfTemplateTypeParameter()) 443 return ParseTypeParameter(Depth, Position); 444 445 if (Tok.is(tok::kw_template)) 446 return ParseTemplateTemplateParameter(Depth, Position); 447 448 // If it's none of the above, then it must be a parameter declaration. 449 // NOTE: This will pick up errors in the closure of the template parameter 450 // list (e.g., template < ; Check here to implement >> style closures. 451 return ParseNonTypeTemplateParameter(Depth, Position); 452} 453 454/// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]). 455/// Other kinds of template parameters are parsed in 456/// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter. 457/// 458/// type-parameter: [C++ temp.param] 459/// 'class' ...[opt][C++0x] identifier[opt] 460/// 'class' identifier[opt] '=' type-id 461/// 'typename' ...[opt][C++0x] identifier[opt] 462/// 'typename' identifier[opt] '=' type-id 463Decl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) { 464 assert((Tok.is(tok::kw_class) || Tok.is(tok::kw_typename)) && 465 "A type-parameter starts with 'class' or 'typename'"); 466 467 // Consume the 'class' or 'typename' keyword. 468 bool TypenameKeyword = Tok.is(tok::kw_typename); 469 SourceLocation KeyLoc = ConsumeToken(); 470 471 // Grab the ellipsis (if given). 472 bool Ellipsis = false; 473 SourceLocation EllipsisLoc; 474 if (Tok.is(tok::ellipsis)) { 475 Ellipsis = true; 476 EllipsisLoc = ConsumeToken(); 477 478 Diag(EllipsisLoc, 479 getLang().CPlusPlus0x 480 ? diag::warn_cxx98_compat_variadic_templates 481 : diag::ext_variadic_templates); 482 } 483 484 // Grab the template parameter name (if given) 485 SourceLocation NameLoc; 486 IdentifierInfo* ParamName = 0; 487 if (Tok.is(tok::identifier)) { 488 ParamName = Tok.getIdentifierInfo(); 489 NameLoc = ConsumeToken(); 490 } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || 491 Tok.is(tok::greater)) { 492 // Unnamed template parameter. Don't have to do anything here, just 493 // don't consume this token. 494 } else { 495 Diag(Tok.getLocation(), diag::err_expected_ident); 496 return 0; 497 } 498 499 // Grab a default argument (if available). 500 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 501 // we introduce the type parameter into the local scope. 502 SourceLocation EqualLoc; 503 ParsedType DefaultArg; 504 if (Tok.is(tok::equal)) { 505 EqualLoc = ConsumeToken(); 506 DefaultArg = ParseTypeName().get(); 507 } 508 509 return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, Ellipsis, 510 EllipsisLoc, KeyLoc, ParamName, NameLoc, 511 Depth, Position, EqualLoc, DefaultArg); 512} 513 514/// ParseTemplateTemplateParameter - Handle the parsing of template 515/// template parameters. 516/// 517/// type-parameter: [C++ temp.param] 518/// 'template' '<' template-parameter-list '>' 'class' 519/// ...[opt] identifier[opt] 520/// 'template' '<' template-parameter-list '>' 'class' identifier[opt] 521/// = id-expression 522Decl * 523Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) { 524 assert(Tok.is(tok::kw_template) && "Expected 'template' keyword"); 525 526 // Handle the template <...> part. 527 SourceLocation TemplateLoc = ConsumeToken(); 528 SmallVector<Decl*,8> TemplateParams; 529 SourceLocation LAngleLoc, RAngleLoc; 530 { 531 ParseScope TemplateParmScope(this, Scope::TemplateParamScope); 532 if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc, 533 RAngleLoc)) { 534 return 0; 535 } 536 } 537 538 // Generate a meaningful error if the user forgot to put class before the 539 // identifier, comma, or greater. 540 if (!Tok.is(tok::kw_class)) { 541 Diag(Tok.getLocation(), diag::err_expected_class_before) 542 << PP.getSpelling(Tok); 543 return 0; 544 } 545 ConsumeToken(); 546 547 // Parse the ellipsis, if given. 548 SourceLocation EllipsisLoc; 549 if (Tok.is(tok::ellipsis)) { 550 EllipsisLoc = ConsumeToken(); 551 552 Diag(EllipsisLoc, 553 getLang().CPlusPlus0x 554 ? diag::warn_cxx98_compat_variadic_templates 555 : diag::ext_variadic_templates); 556 } 557 558 // Get the identifier, if given. 559 SourceLocation NameLoc; 560 IdentifierInfo* ParamName = 0; 561 if (Tok.is(tok::identifier)) { 562 ParamName = Tok.getIdentifierInfo(); 563 NameLoc = ConsumeToken(); 564 } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || Tok.is(tok::greater)) { 565 // Unnamed template parameter. Don't have to do anything here, just 566 // don't consume this token. 567 } else { 568 Diag(Tok.getLocation(), diag::err_expected_ident); 569 return 0; 570 } 571 572 TemplateParameterList *ParamList = 573 Actions.ActOnTemplateParameterList(Depth, SourceLocation(), 574 TemplateLoc, LAngleLoc, 575 TemplateParams.data(), 576 TemplateParams.size(), 577 RAngleLoc); 578 579 // Grab a default argument (if available). 580 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 581 // we introduce the template parameter into the local scope. 582 SourceLocation EqualLoc; 583 ParsedTemplateArgument DefaultArg; 584 if (Tok.is(tok::equal)) { 585 EqualLoc = ConsumeToken(); 586 DefaultArg = ParseTemplateTemplateArgument(); 587 if (DefaultArg.isInvalid()) { 588 Diag(Tok.getLocation(), 589 diag::err_default_template_template_parameter_not_template); 590 static const tok::TokenKind EndToks[] = { 591 tok::comma, tok::greater, tok::greatergreater 592 }; 593 SkipUntil(EndToks, 3, true, true); 594 } 595 } 596 597 return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc, 598 ParamList, EllipsisLoc, 599 ParamName, NameLoc, Depth, 600 Position, EqualLoc, DefaultArg); 601} 602 603/// ParseNonTypeTemplateParameter - Handle the parsing of non-type 604/// template parameters (e.g., in "template<int Size> class array;"). 605/// 606/// template-parameter: 607/// ... 608/// parameter-declaration 609Decl * 610Parser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) { 611 // Parse the declaration-specifiers (i.e., the type). 612 // FIXME: The type should probably be restricted in some way... Not all 613 // declarators (parts of declarators?) are accepted for parameters. 614 DeclSpec DS(AttrFactory); 615 ParseDeclarationSpecifiers(DS); 616 617 // Parse this as a typename. 618 Declarator ParamDecl(DS, Declarator::TemplateParamContext); 619 ParseDeclarator(ParamDecl); 620 if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { 621 // This probably shouldn't happen - and it's more of a Sema thing, but 622 // basically we didn't parse the type name because we couldn't associate 623 // it with an AST node. we should just skip to the comma or greater. 624 // TODO: This is currently a placeholder for some kind of Sema Error. 625 Diag(Tok.getLocation(), diag::err_parse_error); 626 SkipUntil(tok::comma, tok::greater, true, true); 627 return 0; 628 } 629 630 // If there is a default value, parse it. 631 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 632 // we introduce the template parameter into the local scope. 633 SourceLocation EqualLoc; 634 ExprResult DefaultArg; 635 if (Tok.is(tok::equal)) { 636 EqualLoc = ConsumeToken(); 637 638 // C++ [temp.param]p15: 639 // When parsing a default template-argument for a non-type 640 // template-parameter, the first non-nested > is taken as the 641 // end of the template-parameter-list rather than a greater-than 642 // operator. 643 GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 644 645 DefaultArg = ParseAssignmentExpression(); 646 if (DefaultArg.isInvalid()) 647 SkipUntil(tok::comma, tok::greater, true, true); 648 } 649 650 // Create the parameter. 651 return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl, 652 Depth, Position, EqualLoc, 653 DefaultArg.take()); 654} 655 656/// \brief Parses a template-id that after the template name has 657/// already been parsed. 658/// 659/// This routine takes care of parsing the enclosed template argument 660/// list ('<' template-parameter-list [opt] '>') and placing the 661/// results into a form that can be transferred to semantic analysis. 662/// 663/// \param Template the template declaration produced by isTemplateName 664/// 665/// \param TemplateNameLoc the source location of the template name 666/// 667/// \param SS if non-NULL, the nested-name-specifier preceding the 668/// template name. 669/// 670/// \param ConsumeLastToken if true, then we will consume the last 671/// token that forms the template-id. Otherwise, we will leave the 672/// last token in the stream (e.g., so that it can be replaced with an 673/// annotation token). 674bool 675Parser::ParseTemplateIdAfterTemplateName(TemplateTy Template, 676 SourceLocation TemplateNameLoc, 677 const CXXScopeSpec &SS, 678 bool ConsumeLastToken, 679 SourceLocation &LAngleLoc, 680 TemplateArgList &TemplateArgs, 681 SourceLocation &RAngleLoc) { 682 assert(Tok.is(tok::less) && "Must have already parsed the template-name"); 683 684 // Consume the '<'. 685 LAngleLoc = ConsumeToken(); 686 687 // Parse the optional template-argument-list. 688 bool Invalid = false; 689 { 690 GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 691 if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater)) 692 Invalid = ParseTemplateArgumentList(TemplateArgs); 693 694 if (Invalid) { 695 // Try to find the closing '>'. 696 SkipUntil(tok::greater, true, !ConsumeLastToken); 697 698 return true; 699 } 700 } 701 702 if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater)) { 703 Diag(Tok.getLocation(), diag::err_expected_greater); 704 return true; 705 } 706 707 // Determine the location of the '>' or '>>'. Only consume this 708 // token if the caller asked us to. 709 RAngleLoc = Tok.getLocation(); 710 711 if (Tok.is(tok::greatergreater)) { 712 if (!getLang().CPlusPlus0x) { 713 const char *ReplaceStr = "> >"; 714 if (NextToken().is(tok::greater) || NextToken().is(tok::greatergreater)) 715 ReplaceStr = "> > "; 716 717 Diag(Tok.getLocation(), diag::err_two_right_angle_brackets_need_space) 718 << FixItHint::CreateReplacement( 719 SourceRange(Tok.getLocation()), ReplaceStr); 720 } 721 722 Tok.setKind(tok::greater); 723 if (!ConsumeLastToken) { 724 // Since we're not supposed to consume the '>>' token, we need 725 // to insert a second '>' token after the first. 726 PP.EnterToken(Tok); 727 } 728 } else if (ConsumeLastToken) 729 ConsumeToken(); 730 731 return false; 732} 733 734/// \brief Replace the tokens that form a simple-template-id with an 735/// annotation token containing the complete template-id. 736/// 737/// The first token in the stream must be the name of a template that 738/// is followed by a '<'. This routine will parse the complete 739/// simple-template-id and replace the tokens with a single annotation 740/// token with one of two different kinds: if the template-id names a 741/// type (and \p AllowTypeAnnotation is true), the annotation token is 742/// a type annotation that includes the optional nested-name-specifier 743/// (\p SS). Otherwise, the annotation token is a template-id 744/// annotation that does not include the optional 745/// nested-name-specifier. 746/// 747/// \param Template the declaration of the template named by the first 748/// token (an identifier), as returned from \c Action::isTemplateName(). 749/// 750/// \param TemplateNameKind the kind of template that \p Template 751/// refers to, as returned from \c Action::isTemplateName(). 752/// 753/// \param SS if non-NULL, the nested-name-specifier that precedes 754/// this template name. 755/// 756/// \param TemplateKWLoc if valid, specifies that this template-id 757/// annotation was preceded by the 'template' keyword and gives the 758/// location of that keyword. If invalid (the default), then this 759/// template-id was not preceded by a 'template' keyword. 760/// 761/// \param AllowTypeAnnotation if true (the default), then a 762/// simple-template-id that refers to a class template, template 763/// template parameter, or other template that produces a type will be 764/// replaced with a type annotation token. Otherwise, the 765/// simple-template-id is always replaced with a template-id 766/// annotation token. 767/// 768/// If an unrecoverable parse error occurs and no annotation token can be 769/// formed, this function returns true. 770/// 771bool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK, 772 CXXScopeSpec &SS, 773 UnqualifiedId &TemplateName, 774 SourceLocation TemplateKWLoc, 775 bool AllowTypeAnnotation) { 776 assert(getLang().CPlusPlus && "Can only annotate template-ids in C++"); 777 assert(Template && Tok.is(tok::less) && 778 "Parser isn't at the beginning of a template-id"); 779 780 // Consume the template-name. 781 SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin(); 782 783 // Parse the enclosed template argument list. 784 SourceLocation LAngleLoc, RAngleLoc; 785 TemplateArgList TemplateArgs; 786 bool Invalid = ParseTemplateIdAfterTemplateName(Template, 787 TemplateNameLoc, 788 SS, false, LAngleLoc, 789 TemplateArgs, 790 RAngleLoc); 791 792 if (Invalid) { 793 // If we failed to parse the template ID but skipped ahead to a >, we're not 794 // going to be able to form a token annotation. Eat the '>' if present. 795 if (Tok.is(tok::greater)) 796 ConsumeToken(); 797 return true; 798 } 799 800 ASTTemplateArgsPtr TemplateArgsPtr(Actions, TemplateArgs.data(), 801 TemplateArgs.size()); 802 803 // Build the annotation token. 804 if (TNK == TNK_Type_template && AllowTypeAnnotation) { 805 TypeResult Type 806 = Actions.ActOnTemplateIdType(SS, 807 Template, TemplateNameLoc, 808 LAngleLoc, TemplateArgsPtr, 809 RAngleLoc); 810 if (Type.isInvalid()) { 811 // If we failed to parse the template ID but skipped ahead to a >, we're not 812 // going to be able to form a token annotation. Eat the '>' if present. 813 if (Tok.is(tok::greater)) 814 ConsumeToken(); 815 return true; 816 } 817 818 Tok.setKind(tok::annot_typename); 819 setTypeAnnotation(Tok, Type.get()); 820 if (SS.isNotEmpty()) 821 Tok.setLocation(SS.getBeginLoc()); 822 else if (TemplateKWLoc.isValid()) 823 Tok.setLocation(TemplateKWLoc); 824 else 825 Tok.setLocation(TemplateNameLoc); 826 } else { 827 // Build a template-id annotation token that can be processed 828 // later. 829 Tok.setKind(tok::annot_template_id); 830 TemplateIdAnnotation *TemplateId 831 = TemplateIdAnnotation::Allocate(TemplateArgs.size()); 832 TemplateId->TemplateNameLoc = TemplateNameLoc; 833 if (TemplateName.getKind() == UnqualifiedId::IK_Identifier) { 834 TemplateId->Name = TemplateName.Identifier; 835 TemplateId->Operator = OO_None; 836 } else { 837 TemplateId->Name = 0; 838 TemplateId->Operator = TemplateName.OperatorFunctionId.Operator; 839 } 840 TemplateId->SS = SS; 841 TemplateId->Template = Template; 842 TemplateId->Kind = TNK; 843 TemplateId->LAngleLoc = LAngleLoc; 844 TemplateId->RAngleLoc = RAngleLoc; 845 ParsedTemplateArgument *Args = TemplateId->getTemplateArgs(); 846 for (unsigned Arg = 0, ArgEnd = TemplateArgs.size(); Arg != ArgEnd; ++Arg) 847 Args[Arg] = ParsedTemplateArgument(TemplateArgs[Arg]); 848 Tok.setAnnotationValue(TemplateId); 849 if (TemplateKWLoc.isValid()) 850 Tok.setLocation(TemplateKWLoc); 851 else 852 Tok.setLocation(TemplateNameLoc); 853 854 TemplateArgsPtr.release(); 855 } 856 857 // Common fields for the annotation token 858 Tok.setAnnotationEndLoc(RAngleLoc); 859 860 // In case the tokens were cached, have Preprocessor replace them with the 861 // annotation token. 862 PP.AnnotateCachedTokens(Tok); 863 return false; 864} 865 866/// \brief Replaces a template-id annotation token with a type 867/// annotation token. 868/// 869/// If there was a failure when forming the type from the template-id, 870/// a type annotation token will still be created, but will have a 871/// NULL type pointer to signify an error. 872void Parser::AnnotateTemplateIdTokenAsType() { 873 assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens"); 874 875 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 876 assert((TemplateId->Kind == TNK_Type_template || 877 TemplateId->Kind == TNK_Dependent_template_name) && 878 "Only works for type and dependent templates"); 879 880 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 881 TemplateId->getTemplateArgs(), 882 TemplateId->NumArgs); 883 884 TypeResult Type 885 = Actions.ActOnTemplateIdType(TemplateId->SS, 886 TemplateId->Template, 887 TemplateId->TemplateNameLoc, 888 TemplateId->LAngleLoc, 889 TemplateArgsPtr, 890 TemplateId->RAngleLoc); 891 // Create the new "type" annotation token. 892 Tok.setKind(tok::annot_typename); 893 setTypeAnnotation(Tok, Type.isInvalid() ? ParsedType() : Type.get()); 894 if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name. 895 Tok.setLocation(TemplateId->SS.getBeginLoc()); 896 // End location stays the same 897 898 // Replace the template-id annotation token, and possible the scope-specifier 899 // that precedes it, with the typename annotation token. 900 PP.AnnotateCachedTokens(Tok); 901} 902 903/// \brief Determine whether the given token can end a template argument. 904static bool isEndOfTemplateArgument(Token Tok) { 905 return Tok.is(tok::comma) || Tok.is(tok::greater) || 906 Tok.is(tok::greatergreater); 907} 908 909/// \brief Parse a C++ template template argument. 910ParsedTemplateArgument Parser::ParseTemplateTemplateArgument() { 911 if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) && 912 !Tok.is(tok::annot_cxxscope)) 913 return ParsedTemplateArgument(); 914 915 // C++0x [temp.arg.template]p1: 916 // A template-argument for a template template-parameter shall be the name 917 // of a class template or an alias template, expressed as id-expression. 918 // 919 // We parse an id-expression that refers to a class template or alias 920 // template. The grammar we parse is: 921 // 922 // nested-name-specifier[opt] template[opt] identifier ...[opt] 923 // 924 // followed by a token that terminates a template argument, such as ',', 925 // '>', or (in some cases) '>>'. 926 CXXScopeSpec SS; // nested-name-specifier, if present 927 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 928 /*EnteringContext=*/false); 929 930 ParsedTemplateArgument Result; 931 SourceLocation EllipsisLoc; 932 if (SS.isSet() && Tok.is(tok::kw_template)) { 933 // Parse the optional 'template' keyword following the 934 // nested-name-specifier. 935 SourceLocation TemplateLoc = ConsumeToken(); 936 937 if (Tok.is(tok::identifier)) { 938 // We appear to have a dependent template name. 939 UnqualifiedId Name; 940 Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 941 ConsumeToken(); // the identifier 942 943 // Parse the ellipsis. 944 if (Tok.is(tok::ellipsis)) 945 EllipsisLoc = ConsumeToken(); 946 947 // If the next token signals the end of a template argument, 948 // then we have a dependent template name that could be a template 949 // template argument. 950 TemplateTy Template; 951 if (isEndOfTemplateArgument(Tok) && 952 Actions.ActOnDependentTemplateName(getCurScope(), TemplateLoc, 953 SS, Name, 954 /*ObjectType=*/ ParsedType(), 955 /*EnteringContext=*/false, 956 Template)) 957 Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 958 } 959 } else if (Tok.is(tok::identifier)) { 960 // We may have a (non-dependent) template name. 961 TemplateTy Template; 962 UnqualifiedId Name; 963 Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 964 ConsumeToken(); // the identifier 965 966 // Parse the ellipsis. 967 if (Tok.is(tok::ellipsis)) 968 EllipsisLoc = ConsumeToken(); 969 970 if (isEndOfTemplateArgument(Tok)) { 971 bool MemberOfUnknownSpecialization; 972 TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS, 973 /*hasTemplateKeyword=*/false, 974 Name, 975 /*ObjectType=*/ ParsedType(), 976 /*EnteringContext=*/false, 977 Template, 978 MemberOfUnknownSpecialization); 979 if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) { 980 // We have an id-expression that refers to a class template or 981 // (C++0x) alias template. 982 Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 983 } 984 } 985 } 986 987 // If this is a pack expansion, build it as such. 988 if (EllipsisLoc.isValid() && !Result.isInvalid()) 989 Result = Actions.ActOnPackExpansion(Result, EllipsisLoc); 990 991 return Result; 992} 993 994/// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]). 995/// 996/// template-argument: [C++ 14.2] 997/// constant-expression 998/// type-id 999/// id-expression 1000ParsedTemplateArgument Parser::ParseTemplateArgument() { 1001 // C++ [temp.arg]p2: 1002 // In a template-argument, an ambiguity between a type-id and an 1003 // expression is resolved to a type-id, regardless of the form of 1004 // the corresponding template-parameter. 1005 // 1006 // Therefore, we initially try to parse a type-id. 1007 if (isCXXTypeId(TypeIdAsTemplateArgument)) { 1008 SourceLocation Loc = Tok.getLocation(); 1009 TypeResult TypeArg = ParseTypeName(/*Range=*/0, 1010 Declarator::TemplateTypeArgContext); 1011 if (TypeArg.isInvalid()) 1012 return ParsedTemplateArgument(); 1013 1014 return ParsedTemplateArgument(ParsedTemplateArgument::Type, 1015 TypeArg.get().getAsOpaquePtr(), 1016 Loc); 1017 } 1018 1019 // Try to parse a template template argument. 1020 { 1021 TentativeParsingAction TPA(*this); 1022 1023 ParsedTemplateArgument TemplateTemplateArgument 1024 = ParseTemplateTemplateArgument(); 1025 if (!TemplateTemplateArgument.isInvalid()) { 1026 TPA.Commit(); 1027 return TemplateTemplateArgument; 1028 } 1029 1030 // Revert this tentative parse to parse a non-type template argument. 1031 TPA.Revert(); 1032 } 1033 1034 // Parse a non-type template argument. 1035 SourceLocation Loc = Tok.getLocation(); 1036 ExprResult ExprArg = ParseConstantExpression(); 1037 if (ExprArg.isInvalid() || !ExprArg.get()) 1038 return ParsedTemplateArgument(); 1039 1040 return ParsedTemplateArgument(ParsedTemplateArgument::NonType, 1041 ExprArg.release(), Loc); 1042} 1043 1044/// \brief Determine whether the current tokens can only be parsed as a 1045/// template argument list (starting with the '<') and never as a '<' 1046/// expression. 1047bool Parser::IsTemplateArgumentList(unsigned Skip) { 1048 struct AlwaysRevertAction : TentativeParsingAction { 1049 AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { } 1050 ~AlwaysRevertAction() { Revert(); } 1051 } Tentative(*this); 1052 1053 while (Skip) { 1054 ConsumeToken(); 1055 --Skip; 1056 } 1057 1058 // '<' 1059 if (!Tok.is(tok::less)) 1060 return false; 1061 ConsumeToken(); 1062 1063 // An empty template argument list. 1064 if (Tok.is(tok::greater)) 1065 return true; 1066 1067 // See whether we have declaration specifiers, which indicate a type. 1068 while (isCXXDeclarationSpecifier() == TPResult::True()) 1069 ConsumeToken(); 1070 1071 // If we have a '>' or a ',' then this is a template argument list. 1072 return Tok.is(tok::greater) || Tok.is(tok::comma); 1073} 1074 1075/// ParseTemplateArgumentList - Parse a C++ template-argument-list 1076/// (C++ [temp.names]). Returns true if there was an error. 1077/// 1078/// template-argument-list: [C++ 14.2] 1079/// template-argument 1080/// template-argument-list ',' template-argument 1081bool 1082Parser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) { 1083 while (true) { 1084 ParsedTemplateArgument Arg = ParseTemplateArgument(); 1085 if (Tok.is(tok::ellipsis)) { 1086 SourceLocation EllipsisLoc = ConsumeToken(); 1087 Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc); 1088 } 1089 1090 if (Arg.isInvalid()) { 1091 SkipUntil(tok::comma, tok::greater, true, true); 1092 return true; 1093 } 1094 1095 // Save this template argument. 1096 TemplateArgs.push_back(Arg); 1097 1098 // If the next token is a comma, consume it and keep reading 1099 // arguments. 1100 if (Tok.isNot(tok::comma)) break; 1101 1102 // Consume the comma. 1103 ConsumeToken(); 1104 } 1105 1106 return false; 1107} 1108 1109/// \brief Parse a C++ explicit template instantiation 1110/// (C++ [temp.explicit]). 1111/// 1112/// explicit-instantiation: 1113/// 'extern' [opt] 'template' declaration 1114/// 1115/// Note that the 'extern' is a GNU extension and C++0x feature. 1116Decl *Parser::ParseExplicitInstantiation(SourceLocation ExternLoc, 1117 SourceLocation TemplateLoc, 1118 SourceLocation &DeclEnd) { 1119 // This isn't really required here. 1120 ParsingDeclRAIIObject ParsingTemplateParams(*this); 1121 1122 return ParseSingleDeclarationAfterTemplate(Declarator::FileContext, 1123 ParsedTemplateInfo(ExternLoc, 1124 TemplateLoc), 1125 ParsingTemplateParams, 1126 DeclEnd, AS_none); 1127} 1128 1129SourceRange Parser::ParsedTemplateInfo::getSourceRange() const { 1130 if (TemplateParams) 1131 return getTemplateParamsRange(TemplateParams->data(), 1132 TemplateParams->size()); 1133 1134 SourceRange R(TemplateLoc); 1135 if (ExternLoc.isValid()) 1136 R.setBegin(ExternLoc); 1137 return R; 1138} 1139 1140void Parser::LateTemplateParserCallback(void *P, const FunctionDecl *FD) { 1141 ((Parser*)P)->LateTemplateParser(FD); 1142} 1143 1144 1145void Parser::LateTemplateParser(const FunctionDecl *FD) { 1146 LateParsedTemplatedFunction *LPT = LateParsedTemplateMap[FD]; 1147 if (LPT) { 1148 ParseLateTemplatedFuncDef(*LPT); 1149 return; 1150 } 1151 1152 llvm_unreachable("Late templated function without associated lexed tokens"); 1153} 1154 1155/// \brief Late parse a C++ function template in Microsoft mode. 1156void Parser::ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT) { 1157 if(!LMT.D) 1158 return; 1159 1160 // If this is a member template, introduce the template parameter scope. 1161 ParseScope TemplateScope(this, Scope::TemplateParamScope); 1162 1163 // Get the FunctionDecl. 1164 FunctionDecl *FD = 0; 1165 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(LMT.D)) 1166 FD = FunTmpl->getTemplatedDecl(); 1167 else 1168 FD = cast<FunctionDecl>(LMT.D); 1169 1170 // Reinject the template parameters. 1171 SmallVector<ParseScope*, 4> TemplateParamScopeStack; 1172 DeclaratorDecl* Declarator = dyn_cast<DeclaratorDecl>(FD); 1173 if (Declarator && Declarator->getNumTemplateParameterLists() != 0) { 1174 Actions.ActOnReenterDeclaratorTemplateScope(getCurScope(), Declarator); 1175 Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D); 1176 } else { 1177 Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D); 1178 1179 // Get the list of DeclContext to reenter. 1180 SmallVector<DeclContext*, 4> DeclContextToReenter; 1181 DeclContext *DD = FD->getLexicalParent(); 1182 while (DD && DD->isRecord()) { 1183 DeclContextToReenter.push_back(DD); 1184 DD = DD->getLexicalParent(); 1185 } 1186 1187 // Reenter template scopes from outmost to innermost. 1188 SmallVector<DeclContext*, 4>::reverse_iterator II = 1189 DeclContextToReenter.rbegin(); 1190 for (; II != DeclContextToReenter.rend(); ++II) { 1191 if (ClassTemplatePartialSpecializationDecl* MD = 1192 dyn_cast_or_null<ClassTemplatePartialSpecializationDecl>(*II)) { 1193 TemplateParamScopeStack.push_back(new ParseScope(this, 1194 Scope::TemplateParamScope)); 1195 Actions.ActOnReenterTemplateScope(getCurScope(), MD); 1196 } else if (CXXRecordDecl* MD = dyn_cast_or_null<CXXRecordDecl>(*II)) { 1197 TemplateParamScopeStack.push_back(new ParseScope(this, 1198 Scope::TemplateParamScope, 1199 MD->getDescribedClassTemplate() != 0 )); 1200 Actions.ActOnReenterTemplateScope(getCurScope(), 1201 MD->getDescribedClassTemplate()); 1202 } 1203 } 1204 } 1205 assert(!LMT.Toks.empty() && "Empty body!"); 1206 1207 // Append the current token at the end of the new token stream so that it 1208 // doesn't get lost. 1209 LMT.Toks.push_back(Tok); 1210 PP.EnterTokenStream(LMT.Toks.data(), LMT.Toks.size(), true, false); 1211 1212 // Consume the previously pushed token. 1213 ConsumeAnyToken(); 1214 assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) 1215 && "Inline method not starting with '{', ':' or 'try'"); 1216 1217 // Parse the method body. Function body parsing code is similar enough 1218 // to be re-used for method bodies as well. 1219 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope); 1220 1221 // Recreate the DeclContext. 1222 Sema::ContextRAII SavedContext(Actions, Actions.getContainingDC(FD)); 1223 1224 if (FunctionTemplateDecl *FunctionTemplate 1225 = dyn_cast_or_null<FunctionTemplateDecl>(LMT.D)) 1226 Actions.ActOnStartOfFunctionDef(getCurScope(), 1227 FunctionTemplate->getTemplatedDecl()); 1228 if (FunctionDecl *Function = dyn_cast_or_null<FunctionDecl>(LMT.D)) 1229 Actions.ActOnStartOfFunctionDef(getCurScope(), Function); 1230 1231 1232 if (Tok.is(tok::kw_try)) { 1233 ParseFunctionTryBlock(LMT.D, FnScope); 1234 } else { 1235 if (Tok.is(tok::colon)) 1236 ParseConstructorInitializer(LMT.D); 1237 else 1238 Actions.ActOnDefaultCtorInitializers(LMT.D); 1239 1240 if (Tok.is(tok::l_brace)) { 1241 ParseFunctionStatementBody(LMT.D, FnScope); 1242 Actions.MarkAsLateParsedTemplate(FD, false); 1243 } else 1244 Actions.ActOnFinishFunctionBody(LMT.D, 0); 1245 } 1246 1247 // Exit scopes. 1248 FnScope.Exit(); 1249 SmallVector<ParseScope*, 4>::reverse_iterator I = 1250 TemplateParamScopeStack.rbegin(); 1251 for (; I != TemplateParamScopeStack.rend(); ++I) 1252 delete *I; 1253 1254 DeclGroupPtrTy grp = Actions.ConvertDeclToDeclGroup(LMT.D); 1255 if (grp) 1256 Actions.getASTConsumer().HandleTopLevelDecl(grp.get()); 1257} 1258 1259/// \brief Lex a delayed template function for late parsing. 1260void Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) { 1261 tok::TokenKind kind = Tok.getKind(); 1262 if (!ConsumeAndStoreFunctionPrologue(Toks)) { 1263 // Consume everything up to (and including) the matching right brace. 1264 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 1265 } 1266 1267 // If we're in a function-try-block, we need to store all the catch blocks. 1268 if (kind == tok::kw_try) { 1269 while (Tok.is(tok::kw_catch)) { 1270 ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false); 1271 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 1272 } 1273 } 1274} 1275