| //===--- ParseObjC.cpp - Objective C Parsing ------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Objective-C portions of the Parser interface. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/PrettyDeclStackTrace.h" |
| #include "clang/Basic/CharInfo.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Parse/ParseDiagnostic.h" |
| #include "clang/Parse/Parser.h" |
| #include "clang/Parse/RAIIObjectsForParser.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "clang/Sema/Scope.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/ADT/StringExtras.h" |
| |
| using namespace clang; |
| |
| /// Skips attributes after an Objective-C @ directive. Emits a diagnostic. |
| void Parser::MaybeSkipAttributes(tok::ObjCKeywordKind Kind) { |
| ParsedAttributes attrs(AttrFactory); |
| if (Tok.is(tok::kw___attribute)) { |
| if (Kind == tok::objc_interface || Kind == tok::objc_protocol) |
| Diag(Tok, diag::err_objc_postfix_attribute_hint) |
| << (Kind == tok::objc_protocol); |
| else |
| Diag(Tok, diag::err_objc_postfix_attribute); |
| ParseGNUAttributes(attrs); |
| } |
| } |
| |
| /// ParseObjCAtDirectives - Handle parts of the external-declaration production: |
| /// external-declaration: [C99 6.9] |
| /// [OBJC] objc-class-definition |
| /// [OBJC] objc-class-declaration |
| /// [OBJC] objc-alias-declaration |
| /// [OBJC] objc-protocol-definition |
| /// [OBJC] objc-method-definition |
| /// [OBJC] '@' 'end' |
| Parser::DeclGroupPtrTy |
| Parser::ParseObjCAtDirectives(ParsedAttributesWithRange &Attrs) { |
| SourceLocation AtLoc = ConsumeToken(); // the "@" |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCAtDirective(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| Decl *SingleDecl = nullptr; |
| switch (Tok.getObjCKeywordID()) { |
| case tok::objc_class: |
| return ParseObjCAtClassDeclaration(AtLoc); |
| case tok::objc_interface: |
| SingleDecl = ParseObjCAtInterfaceDeclaration(AtLoc, Attrs); |
| break; |
| case tok::objc_protocol: |
| return ParseObjCAtProtocolDeclaration(AtLoc, Attrs); |
| case tok::objc_implementation: |
| return ParseObjCAtImplementationDeclaration(AtLoc, Attrs); |
| case tok::objc_end: |
| return ParseObjCAtEndDeclaration(AtLoc); |
| case tok::objc_compatibility_alias: |
| SingleDecl = ParseObjCAtAliasDeclaration(AtLoc); |
| break; |
| case tok::objc_synthesize: |
| SingleDecl = ParseObjCPropertySynthesize(AtLoc); |
| break; |
| case tok::objc_dynamic: |
| SingleDecl = ParseObjCPropertyDynamic(AtLoc); |
| break; |
| case tok::objc_import: |
| if (getLangOpts().Modules || getLangOpts().DebuggerSupport) { |
| SingleDecl = ParseModuleImport(AtLoc); |
| break; |
| } |
| Diag(AtLoc, diag::err_atimport); |
| SkipUntil(tok::semi); |
| return Actions.ConvertDeclToDeclGroup(nullptr); |
| default: |
| Diag(AtLoc, diag::err_unexpected_at); |
| SkipUntil(tok::semi); |
| SingleDecl = nullptr; |
| break; |
| } |
| return Actions.ConvertDeclToDeclGroup(SingleDecl); |
| } |
| |
| /// Class to handle popping type parameters when leaving the scope. |
| class Parser::ObjCTypeParamListScope { |
| Sema &Actions; |
| Scope *S; |
| ObjCTypeParamList *Params; |
| |
| public: |
| ObjCTypeParamListScope(Sema &Actions, Scope *S) |
| : Actions(Actions), S(S), Params(nullptr) {} |
| |
| ~ObjCTypeParamListScope() { |
| leave(); |
| } |
| |
| void enter(ObjCTypeParamList *P) { |
| assert(!Params); |
| Params = P; |
| } |
| |
| void leave() { |
| if (Params) |
| Actions.popObjCTypeParamList(S, Params); |
| Params = nullptr; |
| } |
| }; |
| |
| /// |
| /// objc-class-declaration: |
| /// '@' 'class' objc-class-forward-decl (',' objc-class-forward-decl)* ';' |
| /// |
| /// objc-class-forward-decl: |
| /// identifier objc-type-parameter-list[opt] |
| /// |
| Parser::DeclGroupPtrTy |
| Parser::ParseObjCAtClassDeclaration(SourceLocation atLoc) { |
| ConsumeToken(); // the identifier "class" |
| SmallVector<IdentifierInfo *, 8> ClassNames; |
| SmallVector<SourceLocation, 8> ClassLocs; |
| SmallVector<ObjCTypeParamList *, 8> ClassTypeParams; |
| |
| while (1) { |
| MaybeSkipAttributes(tok::objc_class); |
| if (expectIdentifier()) { |
| SkipUntil(tok::semi); |
| return Actions.ConvertDeclToDeclGroup(nullptr); |
| } |
| ClassNames.push_back(Tok.getIdentifierInfo()); |
| ClassLocs.push_back(Tok.getLocation()); |
| ConsumeToken(); |
| |
| // Parse the optional objc-type-parameter-list. |
| ObjCTypeParamList *TypeParams = nullptr; |
| if (Tok.is(tok::less)) |
| TypeParams = parseObjCTypeParamList(); |
| ClassTypeParams.push_back(TypeParams); |
| if (!TryConsumeToken(tok::comma)) |
| break; |
| } |
| |
| // Consume the ';'. |
| if (ExpectAndConsume(tok::semi, diag::err_expected_after, "@class")) |
| return Actions.ConvertDeclToDeclGroup(nullptr); |
| |
| return Actions.ActOnForwardClassDeclaration(atLoc, ClassNames.data(), |
| ClassLocs.data(), |
| ClassTypeParams, |
| ClassNames.size()); |
| } |
| |
| void Parser::CheckNestedObjCContexts(SourceLocation AtLoc) |
| { |
| Sema::ObjCContainerKind ock = Actions.getObjCContainerKind(); |
| if (ock == Sema::OCK_None) |
| return; |
| |
| Decl *Decl = Actions.getObjCDeclContext(); |
| if (CurParsedObjCImpl) { |
| CurParsedObjCImpl->finish(AtLoc); |
| } else { |
| Actions.ActOnAtEnd(getCurScope(), AtLoc); |
| } |
| Diag(AtLoc, diag::err_objc_missing_end) |
| << FixItHint::CreateInsertion(AtLoc, "@end\n"); |
| if (Decl) |
| Diag(Decl->getBeginLoc(), diag::note_objc_container_start) << (int)ock; |
| } |
| |
| /// |
| /// objc-interface: |
| /// objc-class-interface-attributes[opt] objc-class-interface |
| /// objc-category-interface |
| /// |
| /// objc-class-interface: |
| /// '@' 'interface' identifier objc-type-parameter-list[opt] |
| /// objc-superclass[opt] objc-protocol-refs[opt] |
| /// objc-class-instance-variables[opt] |
| /// objc-interface-decl-list |
| /// @end |
| /// |
| /// objc-category-interface: |
| /// '@' 'interface' identifier objc-type-parameter-list[opt] |
| /// '(' identifier[opt] ')' objc-protocol-refs[opt] |
| /// objc-interface-decl-list |
| /// @end |
| /// |
| /// objc-superclass: |
| /// ':' identifier objc-type-arguments[opt] |
| /// |
| /// objc-class-interface-attributes: |
| /// __attribute__((visibility("default"))) |
| /// __attribute__((visibility("hidden"))) |
| /// __attribute__((deprecated)) |
| /// __attribute__((unavailable)) |
| /// __attribute__((objc_exception)) - used by NSException on 64-bit |
| /// __attribute__((objc_root_class)) |
| /// |
| Decl *Parser::ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc, |
| ParsedAttributes &attrs) { |
| assert(Tok.isObjCAtKeyword(tok::objc_interface) && |
| "ParseObjCAtInterfaceDeclaration(): Expected @interface"); |
| CheckNestedObjCContexts(AtLoc); |
| ConsumeToken(); // the "interface" identifier |
| |
| // Code completion after '@interface'. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCInterfaceDecl(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| MaybeSkipAttributes(tok::objc_interface); |
| |
| if (expectIdentifier()) |
| return nullptr; // missing class or category name. |
| |
| // We have a class or category name - consume it. |
| IdentifierInfo *nameId = Tok.getIdentifierInfo(); |
| SourceLocation nameLoc = ConsumeToken(); |
| |
| // Parse the objc-type-parameter-list or objc-protocol-refs. For the latter |
| // case, LAngleLoc will be valid and ProtocolIdents will capture the |
| // protocol references (that have not yet been resolved). |
| SourceLocation LAngleLoc, EndProtoLoc; |
| SmallVector<IdentifierLocPair, 8> ProtocolIdents; |
| ObjCTypeParamList *typeParameterList = nullptr; |
| ObjCTypeParamListScope typeParamScope(Actions, getCurScope()); |
| if (Tok.is(tok::less)) |
| typeParameterList = parseObjCTypeParamListOrProtocolRefs( |
| typeParamScope, LAngleLoc, ProtocolIdents, EndProtoLoc); |
| |
| if (Tok.is(tok::l_paren) && |
| !isKnownToBeTypeSpecifier(GetLookAheadToken(1))) { // we have a category. |
| |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| T.consumeOpen(); |
| |
| SourceLocation categoryLoc; |
| IdentifierInfo *categoryId = nullptr; |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCInterfaceCategory(getCurScope(), nameId, nameLoc); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| // For ObjC2, the category name is optional (not an error). |
| if (Tok.is(tok::identifier)) { |
| categoryId = Tok.getIdentifierInfo(); |
| categoryLoc = ConsumeToken(); |
| } |
| else if (!getLangOpts().ObjC) { |
| Diag(Tok, diag::err_expected) |
| << tok::identifier; // missing category name. |
| return nullptr; |
| } |
| |
| T.consumeClose(); |
| if (T.getCloseLocation().isInvalid()) |
| return nullptr; |
| |
| // Next, we need to check for any protocol references. |
| assert(LAngleLoc.isInvalid() && "Cannot have already parsed protocols"); |
| SmallVector<Decl *, 8> ProtocolRefs; |
| SmallVector<SourceLocation, 8> ProtocolLocs; |
| if (Tok.is(tok::less) && |
| ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, true, true, |
| LAngleLoc, EndProtoLoc, |
| /*consumeLastToken=*/true)) |
| return nullptr; |
| |
| Decl *CategoryType = Actions.ActOnStartCategoryInterface( |
| AtLoc, nameId, nameLoc, typeParameterList, categoryId, categoryLoc, |
| ProtocolRefs.data(), ProtocolRefs.size(), ProtocolLocs.data(), |
| EndProtoLoc, attrs); |
| |
| if (Tok.is(tok::l_brace)) |
| ParseObjCClassInstanceVariables(CategoryType, tok::objc_private, AtLoc); |
| |
| ParseObjCInterfaceDeclList(tok::objc_not_keyword, CategoryType); |
| |
| return CategoryType; |
| } |
| // Parse a class interface. |
| IdentifierInfo *superClassId = nullptr; |
| SourceLocation superClassLoc; |
| SourceLocation typeArgsLAngleLoc; |
| SmallVector<ParsedType, 4> typeArgs; |
| SourceLocation typeArgsRAngleLoc; |
| SmallVector<Decl *, 4> protocols; |
| SmallVector<SourceLocation, 4> protocolLocs; |
| if (Tok.is(tok::colon)) { // a super class is specified. |
| ConsumeToken(); |
| |
| // Code completion of superclass names. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCSuperclass(getCurScope(), nameId, nameLoc); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (expectIdentifier()) |
| return nullptr; // missing super class name. |
| superClassId = Tok.getIdentifierInfo(); |
| superClassLoc = ConsumeToken(); |
| |
| // Type arguments for the superclass or protocol conformances. |
| if (Tok.is(tok::less)) { |
| parseObjCTypeArgsOrProtocolQualifiers( |
| nullptr, typeArgsLAngleLoc, typeArgs, typeArgsRAngleLoc, LAngleLoc, |
| protocols, protocolLocs, EndProtoLoc, |
| /*consumeLastToken=*/true, |
| /*warnOnIncompleteProtocols=*/true); |
| if (Tok.is(tok::eof)) |
| return nullptr; |
| } |
| } |
| |
| // Next, we need to check for any protocol references. |
| if (LAngleLoc.isValid()) { |
| if (!ProtocolIdents.empty()) { |
| // We already parsed the protocols named when we thought we had a |
| // type parameter list. Translate them into actual protocol references. |
| for (const auto &pair : ProtocolIdents) { |
| protocolLocs.push_back(pair.second); |
| } |
| Actions.FindProtocolDeclaration(/*WarnOnDeclarations=*/true, |
| /*ForObjCContainer=*/true, |
| ProtocolIdents, protocols); |
| } |
| } else if (protocols.empty() && Tok.is(tok::less) && |
| ParseObjCProtocolReferences(protocols, protocolLocs, true, true, |
| LAngleLoc, EndProtoLoc, |
| /*consumeLastToken=*/true)) { |
| return nullptr; |
| } |
| |
| if (Tok.isNot(tok::less)) |
| Actions.ActOnTypedefedProtocols(protocols, protocolLocs, |
| superClassId, superClassLoc); |
| |
| Decl *ClsType = Actions.ActOnStartClassInterface( |
| getCurScope(), AtLoc, nameId, nameLoc, typeParameterList, superClassId, |
| superClassLoc, typeArgs, |
| SourceRange(typeArgsLAngleLoc, typeArgsRAngleLoc), protocols.data(), |
| protocols.size(), protocolLocs.data(), EndProtoLoc, attrs); |
| |
| if (Tok.is(tok::l_brace)) |
| ParseObjCClassInstanceVariables(ClsType, tok::objc_protected, AtLoc); |
| |
| ParseObjCInterfaceDeclList(tok::objc_interface, ClsType); |
| |
| return ClsType; |
| } |
| |
| /// Add an attribute for a context-sensitive type nullability to the given |
| /// declarator. |
| static void addContextSensitiveTypeNullability(Parser &P, |
| Declarator &D, |
| NullabilityKind nullability, |
| SourceLocation nullabilityLoc, |
| bool &addedToDeclSpec) { |
| // Create the attribute. |
| auto getNullabilityAttr = [&](AttributePool &Pool) -> ParsedAttr * { |
| return Pool.create(P.getNullabilityKeyword(nullability), |
| SourceRange(nullabilityLoc), nullptr, SourceLocation(), |
| nullptr, 0, ParsedAttr::AS_ContextSensitiveKeyword); |
| }; |
| |
| if (D.getNumTypeObjects() > 0) { |
| // Add the attribute to the declarator chunk nearest the declarator. |
| D.getTypeObject(0).getAttrs().addAtEnd( |
| getNullabilityAttr(D.getAttributePool())); |
| } else if (!addedToDeclSpec) { |
| // Otherwise, just put it on the declaration specifiers (if one |
| // isn't there already). |
| D.getMutableDeclSpec().getAttributes().addAtEnd( |
| getNullabilityAttr(D.getMutableDeclSpec().getAttributes().getPool())); |
| addedToDeclSpec = true; |
| } |
| } |
| |
| /// Parse an Objective-C type parameter list, if present, or capture |
| /// the locations of the protocol identifiers for a list of protocol |
| /// references. |
| /// |
| /// objc-type-parameter-list: |
| /// '<' objc-type-parameter (',' objc-type-parameter)* '>' |
| /// |
| /// objc-type-parameter: |
| /// objc-type-parameter-variance? identifier objc-type-parameter-bound[opt] |
| /// |
| /// objc-type-parameter-bound: |
| /// ':' type-name |
| /// |
| /// objc-type-parameter-variance: |
| /// '__covariant' |
| /// '__contravariant' |
| /// |
| /// \param lAngleLoc The location of the starting '<'. |
| /// |
| /// \param protocolIdents Will capture the list of identifiers, if the |
| /// angle brackets contain a list of protocol references rather than a |
| /// type parameter list. |
| /// |
| /// \param rAngleLoc The location of the ending '>'. |
| ObjCTypeParamList *Parser::parseObjCTypeParamListOrProtocolRefs( |
| ObjCTypeParamListScope &Scope, SourceLocation &lAngleLoc, |
| SmallVectorImpl<IdentifierLocPair> &protocolIdents, |
| SourceLocation &rAngleLoc, bool mayBeProtocolList) { |
| assert(Tok.is(tok::less) && "Not at the beginning of a type parameter list"); |
| |
| // Within the type parameter list, don't treat '>' as an operator. |
| GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); |
| |
| // Local function to "flush" the protocol identifiers, turning them into |
| // type parameters. |
| SmallVector<Decl *, 4> typeParams; |
| auto makeProtocolIdentsIntoTypeParameters = [&]() { |
| unsigned index = 0; |
| for (const auto &pair : protocolIdents) { |
| DeclResult typeParam = Actions.actOnObjCTypeParam( |
| getCurScope(), ObjCTypeParamVariance::Invariant, SourceLocation(), |
| index++, pair.first, pair.second, SourceLocation(), nullptr); |
| if (typeParam.isUsable()) |
| typeParams.push_back(typeParam.get()); |
| } |
| |
| protocolIdents.clear(); |
| mayBeProtocolList = false; |
| }; |
| |
| bool invalid = false; |
| lAngleLoc = ConsumeToken(); |
| |
| do { |
| // Parse the variance, if any. |
| SourceLocation varianceLoc; |
| ObjCTypeParamVariance variance = ObjCTypeParamVariance::Invariant; |
| if (Tok.is(tok::kw___covariant) || Tok.is(tok::kw___contravariant)) { |
| variance = Tok.is(tok::kw___covariant) |
| ? ObjCTypeParamVariance::Covariant |
| : ObjCTypeParamVariance::Contravariant; |
| varianceLoc = ConsumeToken(); |
| |
| // Once we've seen a variance specific , we know this is not a |
| // list of protocol references. |
| if (mayBeProtocolList) { |
| // Up until now, we have been queuing up parameters because they |
| // might be protocol references. Turn them into parameters now. |
| makeProtocolIdentsIntoTypeParameters(); |
| } |
| } |
| |
| // Parse the identifier. |
| if (!Tok.is(tok::identifier)) { |
| // Code completion. |
| if (Tok.is(tok::code_completion)) { |
| // FIXME: If these aren't protocol references, we'll need different |
| // completions. |
| Actions.CodeCompleteObjCProtocolReferences(protocolIdents); |
| cutOffParsing(); |
| |
| // FIXME: Better recovery here?. |
| return nullptr; |
| } |
| |
| Diag(Tok, diag::err_objc_expected_type_parameter); |
| invalid = true; |
| break; |
| } |
| |
| IdentifierInfo *paramName = Tok.getIdentifierInfo(); |
| SourceLocation paramLoc = ConsumeToken(); |
| |
| // If there is a bound, parse it. |
| SourceLocation colonLoc; |
| TypeResult boundType; |
| if (TryConsumeToken(tok::colon, colonLoc)) { |
| // Once we've seen a bound, we know this is not a list of protocol |
| // references. |
| if (mayBeProtocolList) { |
| // Up until now, we have been queuing up parameters because they |
| // might be protocol references. Turn them into parameters now. |
| makeProtocolIdentsIntoTypeParameters(); |
| } |
| |
| // type-name |
| boundType = ParseTypeName(); |
| if (boundType.isInvalid()) |
| invalid = true; |
| } else if (mayBeProtocolList) { |
| // If this could still be a protocol list, just capture the identifier. |
| // We don't want to turn it into a parameter. |
| protocolIdents.push_back(std::make_pair(paramName, paramLoc)); |
| continue; |
| } |
| |
| // Create the type parameter. |
| DeclResult typeParam = Actions.actOnObjCTypeParam( |
| getCurScope(), variance, varianceLoc, typeParams.size(), paramName, |
| paramLoc, colonLoc, boundType.isUsable() ? boundType.get() : nullptr); |
| if (typeParam.isUsable()) |
| typeParams.push_back(typeParam.get()); |
| } while (TryConsumeToken(tok::comma)); |
| |
| // Parse the '>'. |
| if (invalid) { |
| SkipUntil(tok::greater, tok::at, StopBeforeMatch); |
| if (Tok.is(tok::greater)) |
| ConsumeToken(); |
| } else if (ParseGreaterThanInTemplateList(lAngleLoc, rAngleLoc, |
| /*ConsumeLastToken=*/true, |
| /*ObjCGenericList=*/true)) { |
| SkipUntil({tok::greater, tok::greaterequal, tok::at, tok::minus, |
| tok::minus, tok::plus, tok::colon, tok::l_paren, tok::l_brace, |
| tok::comma, tok::semi }, |
| StopBeforeMatch); |
| if (Tok.is(tok::greater)) |
| ConsumeToken(); |
| } |
| |
| if (mayBeProtocolList) { |
| // A type parameter list must be followed by either a ':' (indicating the |
| // presence of a superclass) or a '(' (indicating that this is a category |
| // or extension). This disambiguates between an objc-type-parameter-list |
| // and a objc-protocol-refs. |
| if (Tok.isNot(tok::colon) && Tok.isNot(tok::l_paren)) { |
| // Returning null indicates that we don't have a type parameter list. |
| // The results the caller needs to handle the protocol references are |
| // captured in the reference parameters already. |
| return nullptr; |
| } |
| |
| // We have a type parameter list that looks like a list of protocol |
| // references. Turn that parameter list into type parameters. |
| makeProtocolIdentsIntoTypeParameters(); |
| } |
| |
| // Form the type parameter list and enter its scope. |
| ObjCTypeParamList *list = Actions.actOnObjCTypeParamList( |
| getCurScope(), |
| lAngleLoc, |
| typeParams, |
| rAngleLoc); |
| Scope.enter(list); |
| |
| // Clear out the angle locations; they're used by the caller to indicate |
| // whether there are any protocol references. |
| lAngleLoc = SourceLocation(); |
| rAngleLoc = SourceLocation(); |
| return invalid ? nullptr : list; |
| } |
| |
| /// Parse an objc-type-parameter-list. |
| ObjCTypeParamList *Parser::parseObjCTypeParamList() { |
| SourceLocation lAngleLoc; |
| SmallVector<IdentifierLocPair, 1> protocolIdents; |
| SourceLocation rAngleLoc; |
| |
| ObjCTypeParamListScope Scope(Actions, getCurScope()); |
| return parseObjCTypeParamListOrProtocolRefs(Scope, lAngleLoc, protocolIdents, |
| rAngleLoc, |
| /*mayBeProtocolList=*/false); |
| } |
| |
| /// objc-interface-decl-list: |
| /// empty |
| /// objc-interface-decl-list objc-property-decl [OBJC2] |
| /// objc-interface-decl-list objc-method-requirement [OBJC2] |
| /// objc-interface-decl-list objc-method-proto ';' |
| /// objc-interface-decl-list declaration |
| /// objc-interface-decl-list ';' |
| /// |
| /// objc-method-requirement: [OBJC2] |
| /// @required |
| /// @optional |
| /// |
| void Parser::ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey, |
| Decl *CDecl) { |
| SmallVector<Decl *, 32> allMethods; |
| SmallVector<DeclGroupPtrTy, 8> allTUVariables; |
| tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword; |
| |
| SourceRange AtEnd; |
| |
| while (1) { |
| // If this is a method prototype, parse it. |
| if (Tok.isOneOf(tok::minus, tok::plus)) { |
| if (Decl *methodPrototype = |
| ParseObjCMethodPrototype(MethodImplKind, false)) |
| allMethods.push_back(methodPrototype); |
| // Consume the ';' here, since ParseObjCMethodPrototype() is re-used for |
| // method definitions. |
| if (ExpectAndConsumeSemi(diag::err_expected_semi_after_method_proto)) { |
| // We didn't find a semi and we error'ed out. Skip until a ';' or '@'. |
| SkipUntil(tok::at, StopAtSemi | StopBeforeMatch); |
| if (Tok.is(tok::semi)) |
| ConsumeToken(); |
| } |
| continue; |
| } |
| if (Tok.is(tok::l_paren)) { |
| Diag(Tok, diag::err_expected_minus_or_plus); |
| ParseObjCMethodDecl(Tok.getLocation(), |
| tok::minus, |
| MethodImplKind, false); |
| continue; |
| } |
| // Ignore excess semicolons. |
| if (Tok.is(tok::semi)) { |
| // FIXME: This should use ConsumeExtraSemi() for extraneous semicolons, |
| // to make -Wextra-semi diagnose them. |
| ConsumeToken(); |
| continue; |
| } |
| |
| // If we got to the end of the file, exit the loop. |
| if (isEofOrEom()) |
| break; |
| |
| // Code completion within an Objective-C interface. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteOrdinaryName(getCurScope(), |
| CurParsedObjCImpl? Sema::PCC_ObjCImplementation |
| : Sema::PCC_ObjCInterface); |
| return cutOffParsing(); |
| } |
| |
| // If we don't have an @ directive, parse it as a function definition. |
| if (Tok.isNot(tok::at)) { |
| // The code below does not consume '}'s because it is afraid of eating the |
| // end of a namespace. Because of the way this code is structured, an |
| // erroneous r_brace would cause an infinite loop if not handled here. |
| if (Tok.is(tok::r_brace)) |
| break; |
| |
| ParsedAttributesWithRange attrs(AttrFactory); |
| |
| // Since we call ParseDeclarationOrFunctionDefinition() instead of |
| // ParseExternalDeclaration() below (so that this doesn't parse nested |
| // @interfaces), this needs to duplicate some code from the latter. |
| if (Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) { |
| SourceLocation DeclEnd; |
| allTUVariables.push_back( |
| ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs)); |
| continue; |
| } |
| |
| allTUVariables.push_back(ParseDeclarationOrFunctionDefinition(attrs)); |
| continue; |
| } |
| |
| // Otherwise, we have an @ directive, eat the @. |
| SourceLocation AtLoc = ConsumeToken(); // the "@" |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCAtDirective(getCurScope()); |
| return cutOffParsing(); |
| } |
| |
| tok::ObjCKeywordKind DirectiveKind = Tok.getObjCKeywordID(); |
| |
| if (DirectiveKind == tok::objc_end) { // @end -> terminate list |
| AtEnd.setBegin(AtLoc); |
| AtEnd.setEnd(Tok.getLocation()); |
| break; |
| } else if (DirectiveKind == tok::objc_not_keyword) { |
| Diag(Tok, diag::err_objc_unknown_at); |
| SkipUntil(tok::semi); |
| continue; |
| } |
| |
| // Eat the identifier. |
| ConsumeToken(); |
| |
| switch (DirectiveKind) { |
| default: |
| // FIXME: If someone forgets an @end on a protocol, this loop will |
| // continue to eat up tons of stuff and spew lots of nonsense errors. It |
| // would probably be better to bail out if we saw an @class or @interface |
| // or something like that. |
| Diag(AtLoc, diag::err_objc_illegal_interface_qual); |
| // Skip until we see an '@' or '}' or ';'. |
| SkipUntil(tok::r_brace, tok::at, StopAtSemi); |
| break; |
| |
| case tok::objc_implementation: |
| case tok::objc_interface: |
| Diag(AtLoc, diag::err_objc_missing_end) |
| << FixItHint::CreateInsertion(AtLoc, "@end\n"); |
| Diag(CDecl->getBeginLoc(), diag::note_objc_container_start) |
| << (int)Actions.getObjCContainerKind(); |
| ConsumeToken(); |
| break; |
| |
| case tok::objc_required: |
| case tok::objc_optional: |
| // This is only valid on protocols. |
| if (contextKey != tok::objc_protocol) |
| Diag(AtLoc, diag::err_objc_directive_only_in_protocol); |
| else |
| MethodImplKind = DirectiveKind; |
| break; |
| |
| case tok::objc_property: |
| ObjCDeclSpec OCDS; |
| SourceLocation LParenLoc; |
| // Parse property attribute list, if any. |
| if (Tok.is(tok::l_paren)) { |
| LParenLoc = Tok.getLocation(); |
| ParseObjCPropertyAttribute(OCDS); |
| } |
| |
| bool addedToDeclSpec = false; |
| auto ObjCPropertyCallback = [&](ParsingFieldDeclarator &FD) { |
| if (FD.D.getIdentifier() == nullptr) { |
| Diag(AtLoc, diag::err_objc_property_requires_field_name) |
| << FD.D.getSourceRange(); |
| return; |
| } |
| if (FD.BitfieldSize) { |
| Diag(AtLoc, diag::err_objc_property_bitfield) |
| << FD.D.getSourceRange(); |
| return; |
| } |
| |
| // Map a nullability property attribute to a context-sensitive keyword |
| // attribute. |
| if (OCDS.getPropertyAttributes() & |
| ObjCPropertyAttribute::kind_nullability) |
| addContextSensitiveTypeNullability(*this, FD.D, OCDS.getNullability(), |
| OCDS.getNullabilityLoc(), |
| addedToDeclSpec); |
| |
| // Install the property declarator into interfaceDecl. |
| IdentifierInfo *SelName = |
| OCDS.getGetterName() ? OCDS.getGetterName() : FD.D.getIdentifier(); |
| |
| Selector GetterSel = PP.getSelectorTable().getNullarySelector(SelName); |
| IdentifierInfo *SetterName = OCDS.getSetterName(); |
| Selector SetterSel; |
| if (SetterName) |
| SetterSel = PP.getSelectorTable().getSelector(1, &SetterName); |
| else |
| SetterSel = SelectorTable::constructSetterSelector( |
| PP.getIdentifierTable(), PP.getSelectorTable(), |
| FD.D.getIdentifier()); |
| Decl *Property = Actions.ActOnProperty( |
| getCurScope(), AtLoc, LParenLoc, FD, OCDS, GetterSel, SetterSel, |
| MethodImplKind); |
| |
| FD.complete(Property); |
| }; |
| |
| // Parse all the comma separated declarators. |
| ParsingDeclSpec DS(*this); |
| ParseStructDeclaration(DS, ObjCPropertyCallback); |
| |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); |
| break; |
| } |
| } |
| |
| // We break out of the big loop in two cases: when we see @end or when we see |
| // EOF. In the former case, eat the @end. In the later case, emit an error. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCAtDirective(getCurScope()); |
| return cutOffParsing(); |
| } else if (Tok.isObjCAtKeyword(tok::objc_end)) { |
| ConsumeToken(); // the "end" identifier |
| } else { |
| Diag(Tok, diag::err_objc_missing_end) |
| << FixItHint::CreateInsertion(Tok.getLocation(), "\n@end\n"); |
| Diag(CDecl->getBeginLoc(), diag::note_objc_container_start) |
| << (int)Actions.getObjCContainerKind(); |
| AtEnd.setBegin(Tok.getLocation()); |
| AtEnd.setEnd(Tok.getLocation()); |
| } |
| |
| // Insert collected methods declarations into the @interface object. |
| // This passes in an invalid SourceLocation for AtEndLoc when EOF is hit. |
| Actions.ActOnAtEnd(getCurScope(), AtEnd, allMethods, allTUVariables); |
| } |
| |
| /// Diagnose redundant or conflicting nullability information. |
| static void diagnoseRedundantPropertyNullability(Parser &P, |
| ObjCDeclSpec &DS, |
| NullabilityKind nullability, |
| SourceLocation nullabilityLoc){ |
| if (DS.getNullability() == nullability) { |
| P.Diag(nullabilityLoc, diag::warn_nullability_duplicate) |
| << DiagNullabilityKind(nullability, true) |
| << SourceRange(DS.getNullabilityLoc()); |
| return; |
| } |
| |
| P.Diag(nullabilityLoc, diag::err_nullability_conflicting) |
| << DiagNullabilityKind(nullability, true) |
| << DiagNullabilityKind(DS.getNullability(), true) |
| << SourceRange(DS.getNullabilityLoc()); |
| } |
| |
| /// Parse property attribute declarations. |
| /// |
| /// property-attr-decl: '(' property-attrlist ')' |
| /// property-attrlist: |
| /// property-attribute |
| /// property-attrlist ',' property-attribute |
| /// property-attribute: |
| /// getter '=' identifier |
| /// setter '=' identifier ':' |
| /// direct |
| /// readonly |
| /// readwrite |
| /// assign |
| /// retain |
| /// copy |
| /// nonatomic |
| /// atomic |
| /// strong |
| /// weak |
| /// unsafe_unretained |
| /// nonnull |
| /// nullable |
| /// null_unspecified |
| /// null_resettable |
| /// class |
| /// |
| void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) { |
| assert(Tok.getKind() == tok::l_paren); |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| T.consumeOpen(); |
| |
| while (1) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCPropertyFlags(getCurScope(), DS); |
| return cutOffParsing(); |
| } |
| const IdentifierInfo *II = Tok.getIdentifierInfo(); |
| |
| // If this is not an identifier at all, bail out early. |
| if (!II) { |
| T.consumeClose(); |
| return; |
| } |
| |
| SourceLocation AttrName = ConsumeToken(); // consume last attribute name |
| |
| if (II->isStr("readonly")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_readonly); |
| else if (II->isStr("assign")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_assign); |
| else if (II->isStr("unsafe_unretained")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_unsafe_unretained); |
| else if (II->isStr("readwrite")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_readwrite); |
| else if (II->isStr("retain")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_retain); |
| else if (II->isStr("strong")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_strong); |
| else if (II->isStr("copy")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_copy); |
| else if (II->isStr("nonatomic")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_nonatomic); |
| else if (II->isStr("atomic")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_atomic); |
| else if (II->isStr("weak")) |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_weak); |
| else if (II->isStr("getter") || II->isStr("setter")) { |
| bool IsSetter = II->getNameStart()[0] == 's'; |
| |
| // getter/setter require extra treatment. |
| unsigned DiagID = IsSetter ? diag::err_objc_expected_equal_for_setter : |
| diag::err_objc_expected_equal_for_getter; |
| |
| if (ExpectAndConsume(tok::equal, DiagID)) { |
| SkipUntil(tok::r_paren, StopAtSemi); |
| return; |
| } |
| |
| if (Tok.is(tok::code_completion)) { |
| if (IsSetter) |
| Actions.CodeCompleteObjCPropertySetter(getCurScope()); |
| else |
| Actions.CodeCompleteObjCPropertyGetter(getCurScope()); |
| return cutOffParsing(); |
| } |
| |
| SourceLocation SelLoc; |
| IdentifierInfo *SelIdent = ParseObjCSelectorPiece(SelLoc); |
| |
| if (!SelIdent) { |
| Diag(Tok, diag::err_objc_expected_selector_for_getter_setter) |
| << IsSetter; |
| SkipUntil(tok::r_paren, StopAtSemi); |
| return; |
| } |
| |
| if (IsSetter) { |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_setter); |
| DS.setSetterName(SelIdent, SelLoc); |
| |
| if (ExpectAndConsume(tok::colon, |
| diag::err_expected_colon_after_setter_name)) { |
| SkipUntil(tok::r_paren, StopAtSemi); |
| return; |
| } |
| } else { |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_getter); |
| DS.setGetterName(SelIdent, SelLoc); |
| } |
| } else if (II->isStr("nonnull")) { |
| if (DS.getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability) |
| diagnoseRedundantPropertyNullability(*this, DS, |
| NullabilityKind::NonNull, |
| Tok.getLocation()); |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_nullability); |
| DS.setNullability(Tok.getLocation(), NullabilityKind::NonNull); |
| } else if (II->isStr("nullable")) { |
| if (DS.getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability) |
| diagnoseRedundantPropertyNullability(*this, DS, |
| NullabilityKind::Nullable, |
| Tok.getLocation()); |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_nullability); |
| DS.setNullability(Tok.getLocation(), NullabilityKind::Nullable); |
| } else if (II->isStr("null_unspecified")) { |
| if (DS.getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability) |
| diagnoseRedundantPropertyNullability(*this, DS, |
| NullabilityKind::Unspecified, |
| Tok.getLocation()); |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_nullability); |
| DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified); |
| } else if (II->isStr("null_resettable")) { |
| if (DS.getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability) |
| diagnoseRedundantPropertyNullability(*this, DS, |
| NullabilityKind::Unspecified, |
| Tok.getLocation()); |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_nullability); |
| DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified); |
| |
| // Also set the null_resettable bit. |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_null_resettable); |
| } else if (II->isStr("class")) { |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_class); |
| } else if (II->isStr("direct")) { |
| DS.setPropertyAttributes(ObjCPropertyAttribute::kind_direct); |
| } else { |
| Diag(AttrName, diag::err_objc_expected_property_attr) << II; |
| SkipUntil(tok::r_paren, StopAtSemi); |
| return; |
| } |
| |
| if (Tok.isNot(tok::comma)) |
| break; |
| |
| ConsumeToken(); |
| } |
| |
| T.consumeClose(); |
| } |
| |
| /// objc-method-proto: |
| /// objc-instance-method objc-method-decl objc-method-attributes[opt] |
| /// objc-class-method objc-method-decl objc-method-attributes[opt] |
| /// |
| /// objc-instance-method: '-' |
| /// objc-class-method: '+' |
| /// |
| /// objc-method-attributes: [OBJC2] |
| /// __attribute__((deprecated)) |
| /// |
| Decl *Parser::ParseObjCMethodPrototype(tok::ObjCKeywordKind MethodImplKind, |
| bool MethodDefinition) { |
| assert(Tok.isOneOf(tok::minus, tok::plus) && "expected +/-"); |
| |
| tok::TokenKind methodType = Tok.getKind(); |
| SourceLocation mLoc = ConsumeToken(); |
| Decl *MDecl = ParseObjCMethodDecl(mLoc, methodType, MethodImplKind, |
| MethodDefinition); |
| // Since this rule is used for both method declarations and definitions, |
| // the caller is (optionally) responsible for consuming the ';'. |
| return MDecl; |
| } |
| |
| /// objc-selector: |
| /// identifier |
| /// one of |
| /// enum struct union if else while do for switch case default |
| /// break continue return goto asm sizeof typeof __alignof |
| /// unsigned long const short volatile signed restrict _Complex |
| /// in out inout bycopy byref oneway int char float double void _Bool |
| /// |
| IdentifierInfo *Parser::ParseObjCSelectorPiece(SourceLocation &SelectorLoc) { |
| |
| switch (Tok.getKind()) { |
| default: |
| return nullptr; |
| case tok::colon: |
| // Empty selector piece uses the location of the ':'. |
| SelectorLoc = Tok.getLocation(); |
| return nullptr; |
| case tok::ampamp: |
| case tok::ampequal: |
| case tok::amp: |
| case tok::pipe: |
| case tok::tilde: |
| case tok::exclaim: |
| case tok::exclaimequal: |
| case tok::pipepipe: |
| case tok::pipeequal: |
| case tok::caret: |
| case tok::caretequal: { |
| std::string ThisTok(PP.getSpelling(Tok)); |
| if (isLetter(ThisTok[0])) { |
| IdentifierInfo *II = &PP.getIdentifierTable().get(ThisTok); |
| Tok.setKind(tok::identifier); |
| SelectorLoc = ConsumeToken(); |
| return II; |
| } |
| return nullptr; |
| } |
| |
| case tok::identifier: |
| case tok::kw_asm: |
| case tok::kw_auto: |
| case tok::kw_bool: |
| case tok::kw_break: |
| case tok::kw_case: |
| case tok::kw_catch: |
| case tok::kw_char: |
| case tok::kw_class: |
| case tok::kw_const: |
| case tok::kw_const_cast: |
| case tok::kw_continue: |
| case tok::kw_default: |
| case tok::kw_delete: |
| case tok::kw_do: |
| case tok::kw_double: |
| case tok::kw_dynamic_cast: |
| case tok::kw_else: |
| case tok::kw_enum: |
| case tok::kw_explicit: |
| case tok::kw_export: |
| case tok::kw_extern: |
| case tok::kw_false: |
| case tok::kw_float: |
| case tok::kw_for: |
| case tok::kw_friend: |
| case tok::kw_goto: |
| case tok::kw_if: |
| case tok::kw_inline: |
| case tok::kw_int: |
| case tok::kw_long: |
| case tok::kw_mutable: |
| case tok::kw_namespace: |
| case tok::kw_new: |
| case tok::kw_operator: |
| case tok::kw_private: |
| case tok::kw_protected: |
| case tok::kw_public: |
| case tok::kw_register: |
| case tok::kw_reinterpret_cast: |
| case tok::kw_restrict: |
| case tok::kw_return: |
| case tok::kw_short: |
| case tok::kw_signed: |
| case tok::kw_sizeof: |
| case tok::kw_static: |
| case tok::kw_static_cast: |
| case tok::kw_struct: |
| case tok::kw_switch: |
| case tok::kw_template: |
| case tok::kw_this: |
| case tok::kw_throw: |
| case tok::kw_true: |
| case tok::kw_try: |
| case tok::kw_typedef: |
| case tok::kw_typeid: |
| case tok::kw_typename: |
| case tok::kw_typeof: |
| case tok::kw_union: |
| case tok::kw_unsigned: |
| case tok::kw_using: |
| case tok::kw_virtual: |
| case tok::kw_void: |
| case tok::kw_volatile: |
| case tok::kw_wchar_t: |
| case tok::kw_while: |
| case tok::kw__Bool: |
| case tok::kw__Complex: |
| case tok::kw___alignof: |
| case tok::kw___auto_type: |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| SelectorLoc = ConsumeToken(); |
| return II; |
| } |
| } |
| |
| /// objc-for-collection-in: 'in' |
| /// |
| bool Parser::isTokIdentifier_in() const { |
| // FIXME: May have to do additional look-ahead to only allow for |
| // valid tokens following an 'in'; such as an identifier, unary operators, |
| // '[' etc. |
| return (getLangOpts().ObjC && Tok.is(tok::identifier) && |
| Tok.getIdentifierInfo() == ObjCTypeQuals[objc_in]); |
| } |
| |
| /// ParseObjCTypeQualifierList - This routine parses the objective-c's type |
| /// qualifier list and builds their bitmask representation in the input |
| /// argument. |
| /// |
| /// objc-type-qualifiers: |
| /// objc-type-qualifier |
| /// objc-type-qualifiers objc-type-qualifier |
| /// |
| /// objc-type-qualifier: |
| /// 'in' |
| /// 'out' |
| /// 'inout' |
| /// 'oneway' |
| /// 'bycopy' |
| /// 'byref' |
| /// 'nonnull' |
| /// 'nullable' |
| /// 'null_unspecified' |
| /// |
| void Parser::ParseObjCTypeQualifierList(ObjCDeclSpec &DS, |
| DeclaratorContext Context) { |
| assert(Context == DeclaratorContext::ObjCParameterContext || |
| Context == DeclaratorContext::ObjCResultContext); |
| |
| while (1) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCPassingType(getCurScope(), DS, |
| Context == DeclaratorContext::ObjCParameterContext); |
| return cutOffParsing(); |
| } |
| |
| if (Tok.isNot(tok::identifier)) |
| return; |
| |
| const IdentifierInfo *II = Tok.getIdentifierInfo(); |
| for (unsigned i = 0; i != objc_NumQuals; ++i) { |
| if (II != ObjCTypeQuals[i] || |
| NextToken().is(tok::less) || |
| NextToken().is(tok::coloncolon)) |
| continue; |
| |
| ObjCDeclSpec::ObjCDeclQualifier Qual; |
| NullabilityKind Nullability; |
| switch (i) { |
| default: llvm_unreachable("Unknown decl qualifier"); |
| case objc_in: Qual = ObjCDeclSpec::DQ_In; break; |
| case objc_out: Qual = ObjCDeclSpec::DQ_Out; break; |
| case objc_inout: Qual = ObjCDeclSpec::DQ_Inout; break; |
| case objc_oneway: Qual = ObjCDeclSpec::DQ_Oneway; break; |
| case objc_bycopy: Qual = ObjCDeclSpec::DQ_Bycopy; break; |
| case objc_byref: Qual = ObjCDeclSpec::DQ_Byref; break; |
| |
| case objc_nonnull: |
| Qual = ObjCDeclSpec::DQ_CSNullability; |
| Nullability = NullabilityKind::NonNull; |
| break; |
| |
| case objc_nullable: |
| Qual = ObjCDeclSpec::DQ_CSNullability; |
| Nullability = NullabilityKind::Nullable; |
| break; |
| |
| case objc_null_unspecified: |
| Qual = ObjCDeclSpec::DQ_CSNullability; |
| Nullability = NullabilityKind::Unspecified; |
| break; |
| } |
| |
| // FIXME: Diagnose redundant specifiers. |
| DS.setObjCDeclQualifier(Qual); |
| if (Qual == ObjCDeclSpec::DQ_CSNullability) |
| DS.setNullability(Tok.getLocation(), Nullability); |
| |
| ConsumeToken(); |
| II = nullptr; |
| break; |
| } |
| |
| // If this wasn't a recognized qualifier, bail out. |
| if (II) return; |
| } |
| } |
| |
| /// Take all the decl attributes out of the given list and add |
| /// them to the given attribute set. |
| static void takeDeclAttributes(ParsedAttributesView &attrs, |
| ParsedAttributesView &from) { |
| for (auto &AL : llvm::reverse(from)) { |
| if (!AL.isUsedAsTypeAttr()) { |
| from.remove(&AL); |
| attrs.addAtEnd(&AL); |
| } |
| } |
| } |
| |
| /// takeDeclAttributes - Take all the decl attributes from the given |
| /// declarator and add them to the given list. |
| static void takeDeclAttributes(ParsedAttributes &attrs, |
| Declarator &D) { |
| // First, take ownership of all attributes. |
| attrs.getPool().takeAllFrom(D.getAttributePool()); |
| attrs.getPool().takeAllFrom(D.getDeclSpec().getAttributePool()); |
| |
| // Now actually move the attributes over. |
| takeDeclAttributes(attrs, D.getMutableDeclSpec().getAttributes()); |
| takeDeclAttributes(attrs, D.getAttributes()); |
| for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) |
| takeDeclAttributes(attrs, D.getTypeObject(i).getAttrs()); |
| } |
| |
| /// objc-type-name: |
| /// '(' objc-type-qualifiers[opt] type-name ')' |
| /// '(' objc-type-qualifiers[opt] ')' |
| /// |
| ParsedType Parser::ParseObjCTypeName(ObjCDeclSpec &DS, |
| DeclaratorContext context, |
| ParsedAttributes *paramAttrs) { |
| assert(context == DeclaratorContext::ObjCParameterContext || |
| context == DeclaratorContext::ObjCResultContext); |
| assert((paramAttrs != nullptr) == |
| (context == DeclaratorContext::ObjCParameterContext)); |
| |
| assert(Tok.is(tok::l_paren) && "expected ("); |
| |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| T.consumeOpen(); |
| |
| ObjCDeclContextSwitch ObjCDC(*this); |
| |
| // Parse type qualifiers, in, inout, etc. |
| ParseObjCTypeQualifierList(DS, context); |
| SourceLocation TypeStartLoc = Tok.getLocation(); |
| |
| ParsedType Ty; |
| if (isTypeSpecifierQualifier() || isObjCInstancetype()) { |
| // Parse an abstract declarator. |
| DeclSpec declSpec(AttrFactory); |
| declSpec.setObjCQualifiers(&DS); |
| DeclSpecContext dsContext = DeclSpecContext::DSC_normal; |
| if (context == DeclaratorContext::ObjCResultContext) |
| dsContext = DeclSpecContext::DSC_objc_method_result; |
| ParseSpecifierQualifierList(declSpec, AS_none, dsContext); |
| Declarator declarator(declSpec, context); |
| ParseDeclarator(declarator); |
| |
| // If that's not invalid, extract a type. |
| if (!declarator.isInvalidType()) { |
| // Map a nullability specifier to a context-sensitive keyword attribute. |
| bool addedToDeclSpec = false; |
| if (DS.getObjCDeclQualifier() & ObjCDeclSpec::DQ_CSNullability) |
| addContextSensitiveTypeNullability(*this, declarator, |
| DS.getNullability(), |
| DS.getNullabilityLoc(), |
| addedToDeclSpec); |
| |
| TypeResult type = Actions.ActOnTypeName(getCurScope(), declarator); |
| if (!type.isInvalid()) |
| Ty = type.get(); |
| |
| // If we're parsing a parameter, steal all the decl attributes |
| // and add them to the decl spec. |
| if (context == DeclaratorContext::ObjCParameterContext) |
| takeDeclAttributes(*paramAttrs, declarator); |
| } |
| } |
| |
| if (Tok.is(tok::r_paren)) |
| T.consumeClose(); |
| else if (Tok.getLocation() == TypeStartLoc) { |
| // If we didn't eat any tokens, then this isn't a type. |
| Diag(Tok, diag::err_expected_type); |
| SkipUntil(tok::r_paren, StopAtSemi); |
| } else { |
| // Otherwise, we found *something*, but didn't get a ')' in the right |
| // place. Emit an error then return what we have as the type. |
| T.consumeClose(); |
| } |
| return Ty; |
| } |
| |
| /// objc-method-decl: |
| /// objc-selector |
| /// objc-keyword-selector objc-parmlist[opt] |
| /// objc-type-name objc-selector |
| /// objc-type-name objc-keyword-selector objc-parmlist[opt] |
| /// |
| /// objc-keyword-selector: |
| /// objc-keyword-decl |
| /// objc-keyword-selector objc-keyword-decl |
| /// |
| /// objc-keyword-decl: |
| /// objc-selector ':' objc-type-name objc-keyword-attributes[opt] identifier |
| /// objc-selector ':' objc-keyword-attributes[opt] identifier |
| /// ':' objc-type-name objc-keyword-attributes[opt] identifier |
| /// ':' objc-keyword-attributes[opt] identifier |
| /// |
| /// objc-parmlist: |
| /// objc-parms objc-ellipsis[opt] |
| /// |
| /// objc-parms: |
| /// objc-parms , parameter-declaration |
| /// |
| /// objc-ellipsis: |
| /// , ... |
| /// |
| /// objc-keyword-attributes: [OBJC2] |
| /// __attribute__((unused)) |
| /// |
| Decl *Parser::ParseObjCMethodDecl(SourceLocation mLoc, |
| tok::TokenKind mType, |
| tok::ObjCKeywordKind MethodImplKind, |
| bool MethodDefinition) { |
| ParsingDeclRAIIObject PD(*this, ParsingDeclRAIIObject::NoParent); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus, |
| /*ReturnType=*/nullptr); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| // Parse the return type if present. |
| ParsedType ReturnType; |
| ObjCDeclSpec DSRet; |
| if (Tok.is(tok::l_paren)) |
| ReturnType = ParseObjCTypeName(DSRet, DeclaratorContext::ObjCResultContext, |
| nullptr); |
| |
| // If attributes exist before the method, parse them. |
| ParsedAttributes methodAttrs(AttrFactory); |
| if (getLangOpts().ObjC) |
| MaybeParseGNUAttributes(methodAttrs); |
| MaybeParseCXX11Attributes(methodAttrs); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus, |
| ReturnType); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| // Now parse the selector. |
| SourceLocation selLoc; |
| IdentifierInfo *SelIdent = ParseObjCSelectorPiece(selLoc); |
| |
| // An unnamed colon is valid. |
| if (!SelIdent && Tok.isNot(tok::colon)) { // missing selector name. |
| Diag(Tok, diag::err_expected_selector_for_method) |
| << SourceRange(mLoc, Tok.getLocation()); |
| // Skip until we get a ; or @. |
| SkipUntil(tok::at, StopAtSemi | StopBeforeMatch); |
| return nullptr; |
| } |
| |
| SmallVector<DeclaratorChunk::ParamInfo, 8> CParamInfo; |
| if (Tok.isNot(tok::colon)) { |
| // If attributes exist after the method, parse them. |
| if (getLangOpts().ObjC) |
| MaybeParseGNUAttributes(methodAttrs); |
| MaybeParseCXX11Attributes(methodAttrs); |
| |
| Selector Sel = PP.getSelectorTable().getNullarySelector(SelIdent); |
| Decl *Result = Actions.ActOnMethodDeclaration( |
| getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType, |
| selLoc, Sel, nullptr, CParamInfo.data(), CParamInfo.size(), methodAttrs, |
| MethodImplKind, false, MethodDefinition); |
| PD.complete(Result); |
| return Result; |
| } |
| |
| SmallVector<IdentifierInfo *, 12> KeyIdents; |
| SmallVector<SourceLocation, 12> KeyLocs; |
| SmallVector<Sema::ObjCArgInfo, 12> ArgInfos; |
| ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope | |
| Scope::FunctionDeclarationScope | Scope::DeclScope); |
| |
| AttributePool allParamAttrs(AttrFactory); |
| while (1) { |
| ParsedAttributes paramAttrs(AttrFactory); |
| Sema::ObjCArgInfo ArgInfo; |
| |
| // Each iteration parses a single keyword argument. |
| if (ExpectAndConsume(tok::colon)) |
| break; |
| |
| ArgInfo.Type = nullptr; |
| if (Tok.is(tok::l_paren)) // Parse the argument type if present. |
| ArgInfo.Type = ParseObjCTypeName(ArgInfo.DeclSpec, |
| DeclaratorContext::ObjCParameterContext, |
| ¶mAttrs); |
| |
| // If attributes exist before the argument name, parse them. |
| // Regardless, collect all the attributes we've parsed so far. |
| if (getLangOpts().ObjC) |
| MaybeParseGNUAttributes(paramAttrs); |
| MaybeParseCXX11Attributes(paramAttrs); |
| ArgInfo.ArgAttrs = paramAttrs; |
| |
| // Code completion for the next piece of the selector. |
| if (Tok.is(tok::code_completion)) { |
| KeyIdents.push_back(SelIdent); |
| Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(), |
| mType == tok::minus, |
| /*AtParameterName=*/true, |
| ReturnType, KeyIdents); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (expectIdentifier()) |
| break; // missing argument name. |
| |
| ArgInfo.Name = Tok.getIdentifierInfo(); |
| ArgInfo.NameLoc = Tok.getLocation(); |
| ConsumeToken(); // Eat the identifier. |
| |
| ArgInfos.push_back(ArgInfo); |
| KeyIdents.push_back(SelIdent); |
| KeyLocs.push_back(selLoc); |
| |
| // Make sure the attributes persist. |
| allParamAttrs.takeAllFrom(paramAttrs.getPool()); |
| |
| // Code completion for the next piece of the selector. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(), |
| mType == tok::minus, |
| /*AtParameterName=*/false, |
| ReturnType, KeyIdents); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| // Check for another keyword selector. |
| SelIdent = ParseObjCSelectorPiece(selLoc); |
| if (!SelIdent && Tok.isNot(tok::colon)) |
| break; |
| if (!SelIdent) { |
| SourceLocation ColonLoc = Tok.getLocation(); |
| if (PP.getLocForEndOfToken(ArgInfo.NameLoc) == ColonLoc) { |
| Diag(ArgInfo.NameLoc, diag::warn_missing_selector_name) << ArgInfo.Name; |
| Diag(ArgInfo.NameLoc, diag::note_missing_selector_name) << ArgInfo.Name; |
| Diag(ColonLoc, diag::note_force_empty_selector_name) << ArgInfo.Name; |
| } |
| } |
| // We have a selector or a colon, continue parsing. |
| } |
| |
| bool isVariadic = false; |
| bool cStyleParamWarned = false; |
| // Parse the (optional) parameter list. |
| while (Tok.is(tok::comma)) { |
| ConsumeToken(); |
| if (Tok.is(tok::ellipsis)) { |
| isVariadic = true; |
| ConsumeToken(); |
| break; |
| } |
| if (!cStyleParamWarned) { |
| Diag(Tok, diag::warn_cstyle_param); |
| cStyleParamWarned = true; |
| } |
| DeclSpec DS(AttrFactory); |
| ParseDeclarationSpecifiers(DS); |
| // Parse the declarator. |
| Declarator ParmDecl(DS, DeclaratorContext::PrototypeContext); |
| ParseDeclarator(ParmDecl); |
| IdentifierInfo *ParmII = ParmDecl.getIdentifier(); |
| Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl); |
| CParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, |
| ParmDecl.getIdentifierLoc(), |
| Param, |
| nullptr)); |
| } |
| |
| // FIXME: Add support for optional parameter list... |
| // If attributes exist after the method, parse them. |
| if (getLangOpts().ObjC) |
| MaybeParseGNUAttributes(methodAttrs); |
| MaybeParseCXX11Attributes(methodAttrs); |
| |
| if (KeyIdents.size() == 0) |
| return nullptr; |
| |
| Selector Sel = PP.getSelectorTable().getSelector(KeyIdents.size(), |
| &KeyIdents[0]); |
| Decl *Result = Actions.ActOnMethodDeclaration( |
| getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType, KeyLocs, |
| Sel, &ArgInfos[0], CParamInfo.data(), CParamInfo.size(), methodAttrs, |
| MethodImplKind, isVariadic, MethodDefinition); |
| |
| PD.complete(Result); |
| return Result; |
| } |
| |
| /// objc-protocol-refs: |
| /// '<' identifier-list '>' |
| /// |
| bool Parser:: |
| ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &Protocols, |
| SmallVectorImpl<SourceLocation> &ProtocolLocs, |
| bool WarnOnDeclarations, bool ForObjCContainer, |
| SourceLocation &LAngleLoc, SourceLocation &EndLoc, |
| bool consumeLastToken) { |
| assert(Tok.is(tok::less) && "expected <"); |
| |
| LAngleLoc = ConsumeToken(); // the "<" |
| |
| SmallVector<IdentifierLocPair, 8> ProtocolIdents; |
| |
| while (1) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCProtocolReferences(ProtocolIdents); |
| cutOffParsing(); |
| return true; |
| } |
| |
| if (expectIdentifier()) { |
| SkipUntil(tok::greater, StopAtSemi); |
| return true; |
| } |
| ProtocolIdents.push_back(std::make_pair(Tok.getIdentifierInfo(), |
| Tok.getLocation())); |
| ProtocolLocs.push_back(Tok.getLocation()); |
| ConsumeToken(); |
| |
| if (!TryConsumeToken(tok::comma)) |
| break; |
| } |
| |
| // Consume the '>'. |
| if (ParseGreaterThanInTemplateList(LAngleLoc, EndLoc, consumeLastToken, |
| /*ObjCGenericList=*/false)) |
| return true; |
| |
| // Convert the list of protocols identifiers into a list of protocol decls. |
| Actions.FindProtocolDeclaration(WarnOnDeclarations, ForObjCContainer, |
| ProtocolIdents, Protocols); |
| return false; |
| } |
| |
| TypeResult Parser::parseObjCProtocolQualifierType(SourceLocation &rAngleLoc) { |
| assert(Tok.is(tok::less) && "Protocol qualifiers start with '<'"); |
| assert(getLangOpts().ObjC && "Protocol qualifiers only exist in Objective-C"); |
| |
| SourceLocation lAngleLoc; |
| SmallVector<Decl *, 8> protocols; |
| SmallVector<SourceLocation, 8> protocolLocs; |
| (void)ParseObjCProtocolReferences(protocols, protocolLocs, false, false, |
| lAngleLoc, rAngleLoc, |
| /*consumeLastToken=*/true); |
| TypeResult result = Actions.actOnObjCProtocolQualifierType(lAngleLoc, |
| protocols, |
| protocolLocs, |
| rAngleLoc); |
| if (result.isUsable()) { |
| Diag(lAngleLoc, diag::warn_objc_protocol_qualifier_missing_id) |
| << FixItHint::CreateInsertion(lAngleLoc, "id") |
| << SourceRange(lAngleLoc, rAngleLoc); |
| } |
| |
| return result; |
| } |
| |
| /// Parse Objective-C type arguments or protocol qualifiers. |
| /// |
| /// objc-type-arguments: |
| /// '<' type-name '...'[opt] (',' type-name '...'[opt])* '>' |
| /// |
| void Parser::parseObjCTypeArgsOrProtocolQualifiers( |
| ParsedType baseType, |
| SourceLocation &typeArgsLAngleLoc, |
| SmallVectorImpl<ParsedType> &typeArgs, |
| SourceLocation &typeArgsRAngleLoc, |
| SourceLocation &protocolLAngleLoc, |
| SmallVectorImpl<Decl *> &protocols, |
| SmallVectorImpl<SourceLocation> &protocolLocs, |
| SourceLocation &protocolRAngleLoc, |
| bool consumeLastToken, |
| bool warnOnIncompleteProtocols) { |
| assert(Tok.is(tok::less) && "Not at the start of type args or protocols"); |
| SourceLocation lAngleLoc = ConsumeToken(); |
| |
| // Whether all of the elements we've parsed thus far are single |
| // identifiers, which might be types or might be protocols. |
| bool allSingleIdentifiers = true; |
| SmallVector<IdentifierInfo *, 4> identifiers; |
| SmallVectorImpl<SourceLocation> &identifierLocs = protocolLocs; |
| |
| // Parse a list of comma-separated identifiers, bailing out if we |
| // see something different. |
| do { |
| // Parse a single identifier. |
| if (Tok.is(tok::identifier) && |
| (NextToken().is(tok::comma) || |
| NextToken().is(tok::greater) || |
| NextToken().is(tok::greatergreater))) { |
| identifiers.push_back(Tok.getIdentifierInfo()); |
| identifierLocs.push_back(ConsumeToken()); |
| continue; |
| } |
| |
| if (Tok.is(tok::code_completion)) { |
| // FIXME: Also include types here. |
| SmallVector<IdentifierLocPair, 4> identifierLocPairs; |
| for (unsigned i = 0, n = identifiers.size(); i != n; ++i) { |
| identifierLocPairs.push_back(IdentifierLocPair(identifiers[i], |
| identifierLocs[i])); |
| } |
| |
| QualType BaseT = Actions.GetTypeFromParser(baseType); |
| if (!BaseT.isNull() && BaseT->acceptsObjCTypeParams()) { |
| Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type); |
| } else { |
| Actions.CodeCompleteObjCProtocolReferences(identifierLocPairs); |
| } |
| cutOffParsing(); |
| return; |
| } |
| |
| allSingleIdentifiers = false; |
| break; |
| } while (TryConsumeToken(tok::comma)); |
| |
| // If we parsed an identifier list, semantic analysis sorts out |
| // whether it refers to protocols or to type arguments. |
| if (allSingleIdentifiers) { |
| // Parse the closing '>'. |
| SourceLocation rAngleLoc; |
| (void)ParseGreaterThanInTemplateList(lAngleLoc, rAngleLoc, consumeLastToken, |
| /*ObjCGenericList=*/true); |
| |
| // Let Sema figure out what we parsed. |
| Actions.actOnObjCTypeArgsOrProtocolQualifiers(getCurScope(), |
| baseType, |
| lAngleLoc, |
| identifiers, |
| identifierLocs, |
| rAngleLoc, |
| typeArgsLAngleLoc, |
| typeArgs, |
| typeArgsRAngleLoc, |
| protocolLAngleLoc, |
| protocols, |
| protocolRAngleLoc, |
| warnOnIncompleteProtocols); |
| return; |
| } |
| |
| // We parsed an identifier list but stumbled into non single identifiers, this |
| // means we might (a) check that what we already parsed is a legitimate type |
| // (not a protocol or unknown type) and (b) parse the remaining ones, which |
| // must all be type args. |
| |
| // Convert the identifiers into type arguments. |
| bool invalid = false; |
| IdentifierInfo *foundProtocolId = nullptr, *foundValidTypeId = nullptr; |
| SourceLocation foundProtocolSrcLoc, foundValidTypeSrcLoc; |
| SmallVector<IdentifierInfo *, 2> unknownTypeArgs; |
| SmallVector<SourceLocation, 2> unknownTypeArgsLoc; |
| |
| for (unsigned i = 0, n = identifiers.size(); i != n; ++i) { |
| ParsedType typeArg |
| = Actions.getTypeName(*identifiers[i], identifierLocs[i], getCurScope()); |
| if (typeArg) { |
| DeclSpec DS(AttrFactory); |
| const char *prevSpec = nullptr; |
| unsigned diagID; |
| DS.SetTypeSpecType(TST_typename, identifierLocs[i], prevSpec, diagID, |
| typeArg, Actions.getASTContext().getPrintingPolicy()); |
| |
| // Form a declarator to turn this into a type. |
| Declarator D(DS, DeclaratorContext::TypeNameContext); |
| TypeResult fullTypeArg = Actions.ActOnTypeName(getCurScope(), D); |
| if (fullTypeArg.isUsable()) { |
| typeArgs.push_back(fullTypeArg.get()); |
| if (!foundValidTypeId) { |
| foundValidTypeId = identifiers[i]; |
| foundValidTypeSrcLoc = identifierLocs[i]; |
| } |
| } else { |
| invalid = true; |
| unknownTypeArgs.push_back(identifiers[i]); |
| unknownTypeArgsLoc.push_back(identifierLocs[i]); |
| } |
| } else { |
| invalid = true; |
| if (!Actions.LookupProtocol(identifiers[i], identifierLocs[i])) { |
| unknownTypeArgs.push_back(identifiers[i]); |
| unknownTypeArgsLoc.push_back(identifierLocs[i]); |
| } else if (!foundProtocolId) { |
| foundProtocolId = identifiers[i]; |
| foundProtocolSrcLoc = identifierLocs[i]; |
| } |
| } |
| } |
| |
| // Continue parsing type-names. |
| do { |
| Token CurTypeTok = Tok; |
| TypeResult typeArg = ParseTypeName(); |
| |
| // Consume the '...' for a pack expansion. |
| SourceLocation ellipsisLoc; |
| TryConsumeToken(tok::ellipsis, ellipsisLoc); |
| if (typeArg.isUsable() && ellipsisLoc.isValid()) { |
| typeArg = Actions.ActOnPackExpansion(typeArg.get(), ellipsisLoc); |
| } |
| |
| if (typeArg.isUsable()) { |
| typeArgs.push_back(typeArg.get()); |
| if (!foundValidTypeId) { |
| foundValidTypeId = CurTypeTok.getIdentifierInfo(); |
| foundValidTypeSrcLoc = CurTypeTok.getLocation(); |
| } |
| } else { |
| invalid = true; |
| } |
| } while (TryConsumeToken(tok::comma)); |
| |
| // Diagnose the mix between type args and protocols. |
| if (foundProtocolId && foundValidTypeId) |
| Actions.DiagnoseTypeArgsAndProtocols(foundProtocolId, foundProtocolSrcLoc, |
| foundValidTypeId, |
| foundValidTypeSrcLoc); |
| |
| // Diagnose unknown arg types. |
| ParsedType T; |
| if (unknownTypeArgs.size()) |
| for (unsigned i = 0, e = unknownTypeArgsLoc.size(); i < e; ++i) |
| Actions.DiagnoseUnknownTypeName(unknownTypeArgs[i], unknownTypeArgsLoc[i], |
| getCurScope(), nullptr, T); |
| |
| // Parse the closing '>'. |
| SourceLocation rAngleLoc; |
| (void)ParseGreaterThanInTemplateList(lAngleLoc, rAngleLoc, consumeLastToken, |
| /*ObjCGenericList=*/true); |
| |
| if (invalid) { |
| typeArgs.clear(); |
| return; |
| } |
| |
| // Record left/right angle locations. |
| typeArgsLAngleLoc = lAngleLoc; |
| typeArgsRAngleLoc = rAngleLoc; |
| } |
| |
| void Parser::parseObjCTypeArgsAndProtocolQualifiers( |
| ParsedType baseType, |
| SourceLocation &typeArgsLAngleLoc, |
| SmallVectorImpl<ParsedType> &typeArgs, |
| SourceLocation &typeArgsRAngleLoc, |
| SourceLocation &protocolLAngleLoc, |
| SmallVectorImpl<Decl *> &protocols, |
| SmallVectorImpl<SourceLocation> &protocolLocs, |
| SourceLocation &protocolRAngleLoc, |
| bool consumeLastToken) { |
| assert(Tok.is(tok::less)); |
| |
| // Parse the first angle-bracket-delimited clause. |
| parseObjCTypeArgsOrProtocolQualifiers(baseType, |
| typeArgsLAngleLoc, |
| typeArgs, |
| typeArgsRAngleLoc, |
| protocolLAngleLoc, |
| protocols, |
| protocolLocs, |
| protocolRAngleLoc, |
| consumeLastToken, |
| /*warnOnIncompleteProtocols=*/false); |
| if (Tok.is(tok::eof)) // Nothing else to do here... |
| return; |
| |
| // An Objective-C object pointer followed by type arguments |
| // can then be followed again by a set of protocol references, e.g., |
| // \c NSArray<NSView><NSTextDelegate> |
| if ((consumeLastToken && Tok.is(tok::less)) || |
| (!consumeLastToken && NextToken().is(tok::less))) { |
| // If we aren't consuming the last token, the prior '>' is still hanging |
| // there. Consume it before we parse the protocol qualifiers. |
| if (!consumeLastToken) |
| ConsumeToken(); |
| |
| if (!protocols.empty()) { |
| SkipUntilFlags skipFlags = SkipUntilFlags(); |
| if (!consumeLastToken) |
| skipFlags = skipFlags | StopBeforeMatch; |
| Diag(Tok, diag::err_objc_type_args_after_protocols) |
| << SourceRange(protocolLAngleLoc, protocolRAngleLoc); |
| SkipUntil(tok::greater, tok::greatergreater, skipFlags); |
| } else { |
| ParseObjCProtocolReferences(protocols, protocolLocs, |
| /*WarnOnDeclarations=*/false, |
| /*ForObjCContainer=*/false, |
| protocolLAngleLoc, protocolRAngleLoc, |
| consumeLastToken); |
| } |
| } |
| } |
| |
| TypeResult Parser::parseObjCTypeArgsAndProtocolQualifiers( |
| SourceLocation loc, |
| ParsedType type, |
| bool consumeLastToken, |
| SourceLocation &endLoc) { |
| assert(Tok.is(tok::less)); |
| SourceLocation typeArgsLAngleLoc; |
| SmallVector<ParsedType, 4> typeArgs; |
| SourceLocation typeArgsRAngleLoc; |
| SourceLocation protocolLAngleLoc; |
| SmallVector<Decl *, 4> protocols; |
| SmallVector<SourceLocation, 4> protocolLocs; |
| SourceLocation protocolRAngleLoc; |
| |
| // Parse type arguments and protocol qualifiers. |
| parseObjCTypeArgsAndProtocolQualifiers(type, typeArgsLAngleLoc, typeArgs, |
| typeArgsRAngleLoc, protocolLAngleLoc, |
| protocols, protocolLocs, |
| protocolRAngleLoc, consumeLastToken); |
| |
| if (Tok.is(tok::eof)) |
| return true; // Invalid type result. |
| |
| // Compute the location of the last token. |
| if (consumeLastToken) |
| endLoc = PrevTokLocation; |
| else |
| endLoc = Tok.getLocation(); |
| |
| return Actions.actOnObjCTypeArgsAndProtocolQualifiers( |
| getCurScope(), |
| loc, |
| type, |
| typeArgsLAngleLoc, |
| typeArgs, |
| typeArgsRAngleLoc, |
| protocolLAngleLoc, |
| protocols, |
| protocolLocs, |
| protocolRAngleLoc); |
| } |
| |
| void Parser::HelperActionsForIvarDeclarations(Decl *interfaceDecl, SourceLocation atLoc, |
| BalancedDelimiterTracker &T, |
| SmallVectorImpl<Decl *> &AllIvarDecls, |
| bool RBraceMissing) { |
| if (!RBraceMissing) |
| T.consumeClose(); |
| |
| Actions.ActOnObjCContainerStartDefinition(interfaceDecl); |
| Actions.ActOnLastBitfield(T.getCloseLocation(), AllIvarDecls); |
| Actions.ActOnObjCContainerFinishDefinition(); |
| // Call ActOnFields() even if we don't have any decls. This is useful |
| // for code rewriting tools that need to be aware of the empty list. |
| Actions.ActOnFields(getCurScope(), atLoc, interfaceDecl, AllIvarDecls, |
| T.getOpenLocation(), T.getCloseLocation(), |
| ParsedAttributesView()); |
| } |
| |
| /// objc-class-instance-variables: |
| /// '{' objc-instance-variable-decl-list[opt] '}' |
| /// |
| /// objc-instance-variable-decl-list: |
| /// objc-visibility-spec |
| /// objc-instance-variable-decl ';' |
| /// ';' |
| /// objc-instance-variable-decl-list objc-visibility-spec |
| /// objc-instance-variable-decl-list objc-instance-variable-decl ';' |
| /// objc-instance-variable-decl-list static_assert-declaration |
| /// objc-instance-variable-decl-list ';' |
| /// |
| /// objc-visibility-spec: |
| /// @private |
| /// @protected |
| /// @public |
| /// @package [OBJC2] |
| /// |
| /// objc-instance-variable-decl: |
| /// struct-declaration |
| /// |
| void Parser::ParseObjCClassInstanceVariables(Decl *interfaceDecl, |
| tok::ObjCKeywordKind visibility, |
| SourceLocation atLoc) { |
| assert(Tok.is(tok::l_brace) && "expected {"); |
| SmallVector<Decl *, 32> AllIvarDecls; |
| |
| ParseScope ClassScope(this, Scope::DeclScope|Scope::ClassScope); |
| ObjCDeclContextSwitch ObjCDC(*this); |
| |
| BalancedDelimiterTracker T(*this, tok::l_brace); |
| T.consumeOpen(); |
| // While we still have something to read, read the instance variables. |
| while (Tok.isNot(tok::r_brace) && !isEofOrEom()) { |
| // Each iteration of this loop reads one objc-instance-variable-decl. |
| |
| // Check for extraneous top-level semicolon. |
| if (Tok.is(tok::semi)) { |
| ConsumeExtraSemi(InstanceVariableList); |
| continue; |
| } |
| |
| // Set the default visibility to private. |
| if (TryConsumeToken(tok::at)) { // parse objc-visibility-spec |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCAtVisibility(getCurScope()); |
| return cutOffParsing(); |
| } |
| |
| switch (Tok.getObjCKeywordID()) { |
| case tok::objc_private: |
| case tok::objc_public: |
| case tok::objc_protected: |
| case tok::objc_package: |
| visibility = Tok.getObjCKeywordID(); |
| ConsumeToken(); |
| continue; |
| |
| case tok::objc_end: |
| Diag(Tok, diag::err_objc_unexpected_atend); |
| Tok.setLocation(Tok.getLocation().getLocWithOffset(-1)); |
| Tok.setKind(tok::at); |
| Tok.setLength(1); |
| PP.EnterToken(Tok, /*IsReinject*/true); |
| HelperActionsForIvarDeclarations(interfaceDecl, atLoc, |
| T, AllIvarDecls, true); |
| return; |
| |
| default: |
| Diag(Tok, diag::err_objc_illegal_visibility_spec); |
| continue; |
| } |
| } |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteOrdinaryName(getCurScope(), |
| Sema::PCC_ObjCInstanceVariableList); |
| return cutOffParsing(); |
| } |
| |
| // This needs to duplicate a small amount of code from |
| // ParseStructUnionBody() for things that should work in both |
| // C struct and in Objective-C class instance variables. |
| if (Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) { |
| SourceLocation DeclEnd; |
| ParseStaticAssertDeclaration(DeclEnd); |
| continue; |
| } |
| |
| auto ObjCIvarCallback = [&](ParsingFieldDeclarator &FD) { |
| Actions.ActOnObjCContainerStartDefinition(interfaceDecl); |
| // Install the declarator into the interface decl. |
| FD.D.setObjCIvar(true); |
| Decl *Field = Actions.ActOnIvar( |
| getCurScope(), FD.D.getDeclSpec().getSourceRange().getBegin(), FD.D, |
| FD.BitfieldSize, visibility); |
| Actions.ActOnObjCContainerFinishDefinition(); |
| if (Field) |
| AllIvarDecls.push_back(Field); |
| FD.complete(Field); |
| }; |
| |
| // Parse all the comma separated declarators. |
| ParsingDeclSpec DS(*this); |
| ParseStructDeclaration(DS, ObjCIvarCallback); |
| |
| if (Tok.is(tok::semi)) { |
| ConsumeToken(); |
| } else { |
| Diag(Tok, diag::err_expected_semi_decl_list); |
| // Skip to end of block or statement |
| SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch); |
| } |
| } |
| HelperActionsForIvarDeclarations(interfaceDecl, atLoc, |
| T, AllIvarDecls, false); |
| } |
| |
| /// objc-protocol-declaration: |
| /// objc-protocol-definition |
| /// objc-protocol-forward-reference |
| /// |
| /// objc-protocol-definition: |
| /// \@protocol identifier |
| /// objc-protocol-refs[opt] |
| /// objc-interface-decl-list |
| /// \@end |
| /// |
| /// objc-protocol-forward-reference: |
| /// \@protocol identifier-list ';' |
| /// |
| /// "\@protocol identifier ;" should be resolved as "\@protocol |
| /// identifier-list ;": objc-interface-decl-list may not start with a |
| /// semicolon in the first alternative if objc-protocol-refs are omitted. |
| Parser::DeclGroupPtrTy |
| Parser::ParseObjCAtProtocolDeclaration(SourceLocation AtLoc, |
| ParsedAttributes &attrs) { |
| assert(Tok.isObjCAtKeyword(tok::objc_protocol) && |
| "ParseObjCAtProtocolDeclaration(): Expected @protocol"); |
| ConsumeToken(); // the "protocol" identifier |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCProtocolDecl(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| MaybeSkipAttributes(tok::objc_protocol); |
| |
| if (expectIdentifier()) |
| return nullptr; // missing protocol name. |
| // Save the protocol name, then consume it. |
| IdentifierInfo *protocolName = Tok.getIdentifierInfo(); |
| SourceLocation nameLoc = ConsumeToken(); |
| |
| if (TryConsumeToken(tok::semi)) { // forward declaration of one protocol. |
| IdentifierLocPair ProtoInfo(protocolName, nameLoc); |
| return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtoInfo, attrs); |
| } |
| |
| CheckNestedObjCContexts(AtLoc); |
| |
| if (Tok.is(tok::comma)) { // list of forward declarations. |
| SmallVector<IdentifierLocPair, 8> ProtocolRefs; |
| ProtocolRefs.push_back(std::make_pair(protocolName, nameLoc)); |
| |
| // Parse the list of forward declarations. |
| while (1) { |
| ConsumeToken(); // the ',' |
| if (expectIdentifier()) { |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| ProtocolRefs.push_back(IdentifierLocPair(Tok.getIdentifierInfo(), |
| Tok.getLocation())); |
| ConsumeToken(); // the identifier |
| |
| if (Tok.isNot(tok::comma)) |
| break; |
| } |
| // Consume the ';'. |
| if (ExpectAndConsume(tok::semi, diag::err_expected_after, "@protocol")) |
| return nullptr; |
| |
| return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtocolRefs, attrs); |
| } |
| |
| // Last, and definitely not least, parse a protocol declaration. |
| SourceLocation LAngleLoc, EndProtoLoc; |
| |
| SmallVector<Decl *, 8> ProtocolRefs; |
| SmallVector<SourceLocation, 8> ProtocolLocs; |
| if (Tok.is(tok::less) && |
| ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, false, true, |
| LAngleLoc, EndProtoLoc, |
| /*consumeLastToken=*/true)) |
| return nullptr; |
| |
| Decl *ProtoType = Actions.ActOnStartProtocolInterface( |
| AtLoc, protocolName, nameLoc, ProtocolRefs.data(), ProtocolRefs.size(), |
| ProtocolLocs.data(), EndProtoLoc, attrs); |
| |
| ParseObjCInterfaceDeclList(tok::objc_protocol, ProtoType); |
| return Actions.ConvertDeclToDeclGroup(ProtoType); |
| } |
| |
| /// objc-implementation: |
| /// objc-class-implementation-prologue |
| /// objc-category-implementation-prologue |
| /// |
| /// objc-class-implementation-prologue: |
| /// @implementation identifier objc-superclass[opt] |
| /// objc-class-instance-variables[opt] |
| /// |
| /// objc-category-implementation-prologue: |
| /// @implementation identifier ( identifier ) |
| Parser::DeclGroupPtrTy |
| Parser::ParseObjCAtImplementationDeclaration(SourceLocation AtLoc, |
| ParsedAttributes &Attrs) { |
| assert(Tok.isObjCAtKeyword(tok::objc_implementation) && |
| "ParseObjCAtImplementationDeclaration(): Expected @implementation"); |
| CheckNestedObjCContexts(AtLoc); |
| ConsumeToken(); // the "implementation" identifier |
| |
| // Code completion after '@implementation'. |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCImplementationDecl(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| MaybeSkipAttributes(tok::objc_implementation); |
| |
| if (expectIdentifier()) |
| return nullptr; // missing class or category name. |
| // We have a class or category name - consume it. |
| IdentifierInfo *nameId = Tok.getIdentifierInfo(); |
| SourceLocation nameLoc = ConsumeToken(); // consume class or category name |
| Decl *ObjCImpDecl = nullptr; |
| |
| // Neither a type parameter list nor a list of protocol references is |
| // permitted here. Parse and diagnose them. |
| if (Tok.is(tok::less)) { |
| SourceLocation lAngleLoc, rAngleLoc; |
| SmallVector<IdentifierLocPair, 8> protocolIdents; |
| SourceLocation diagLoc = Tok.getLocation(); |
| ObjCTypeParamListScope typeParamScope(Actions, getCurScope()); |
| if (parseObjCTypeParamListOrProtocolRefs(typeParamScope, lAngleLoc, |
| protocolIdents, rAngleLoc)) { |
| Diag(diagLoc, diag::err_objc_parameterized_implementation) |
| << SourceRange(diagLoc, PrevTokLocation); |
| } else if (lAngleLoc.isValid()) { |
| Diag(lAngleLoc, diag::err_unexpected_protocol_qualifier) |
| << FixItHint::CreateRemoval(SourceRange(lAngleLoc, rAngleLoc)); |
| } |
| } |
| |
| if (Tok.is(tok::l_paren)) { |
| // we have a category implementation. |
| ConsumeParen(); |
| SourceLocation categoryLoc, rparenLoc; |
| IdentifierInfo *categoryId = nullptr; |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCImplementationCategory(getCurScope(), nameId, nameLoc); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (Tok.is(tok::identifier)) { |
| categoryId = Tok.getIdentifierInfo(); |
| categoryLoc = ConsumeToken(); |
| } else { |
| Diag(Tok, diag::err_expected) |
| << tok::identifier; // missing category name. |
| return nullptr; |
| } |
| if (Tok.isNot(tok::r_paren)) { |
| Diag(Tok, diag::err_expected) << tok::r_paren; |
| SkipUntil(tok::r_paren); // don't stop at ';' |
| return nullptr; |
| } |
| rparenLoc = ConsumeParen(); |
| if (Tok.is(tok::less)) { // we have illegal '<' try to recover |
| Diag(Tok, diag::err_unexpected_protocol_qualifier); |
| SourceLocation protocolLAngleLoc, protocolRAngleLoc; |
| SmallVector<Decl *, 4> protocols; |
| SmallVector<SourceLocation, 4> protocolLocs; |
| (void)ParseObjCProtocolReferences(protocols, protocolLocs, |
| /*warnOnIncompleteProtocols=*/false, |
| /*ForObjCContainer=*/false, |
| protocolLAngleLoc, protocolRAngleLoc, |
| /*consumeLastToken=*/true); |
| } |
| ObjCImpDecl = Actions.ActOnStartCategoryImplementation( |
| AtLoc, nameId, nameLoc, categoryId, categoryLoc, Attrs); |
| |
| } else { |
| // We have a class implementation |
| SourceLocation superClassLoc; |
| IdentifierInfo *superClassId = nullptr; |
| if (TryConsumeToken(tok::colon)) { |
| // We have a super class |
| if (expectIdentifier()) |
| return nullptr; // missing super class name. |
| superClassId = Tok.getIdentifierInfo(); |
| superClassLoc = ConsumeToken(); // Consume super class name |
| } |
| ObjCImpDecl = Actions.ActOnStartClassImplementation( |
| AtLoc, nameId, nameLoc, superClassId, superClassLoc, Attrs); |
| |
| if (Tok.is(tok::l_brace)) // we have ivars |
| ParseObjCClassInstanceVariables(ObjCImpDecl, tok::objc_private, AtLoc); |
| else if (Tok.is(tok::less)) { // we have illegal '<' try to recover |
| Diag(Tok, diag::err_unexpected_protocol_qualifier); |
| |
| SourceLocation protocolLAngleLoc, protocolRAngleLoc; |
| SmallVector<Decl *, 4> protocols; |
| SmallVector<SourceLocation, 4> protocolLocs; |
| (void)ParseObjCProtocolReferences(protocols, protocolLocs, |
| /*warnOnIncompleteProtocols=*/false, |
| /*ForObjCContainer=*/false, |
| protocolLAngleLoc, protocolRAngleLoc, |
| /*consumeLastToken=*/true); |
| } |
| } |
| assert(ObjCImpDecl); |
| |
| SmallVector<Decl *, 8> DeclsInGroup; |
| |
| { |
| ObjCImplParsingDataRAII ObjCImplParsing(*this, ObjCImpDecl); |
| while (!ObjCImplParsing.isFinished() && !isEofOrEom()) { |
| ParsedAttributesWithRange attrs(AttrFactory); |
| MaybeParseCXX11Attributes(attrs); |
| if (DeclGroupPtrTy DGP = ParseExternalDeclaration(attrs)) { |
| DeclGroupRef DG = DGP.get(); |
| DeclsInGroup.append(DG.begin(), DG.end()); |
| } |
| } |
| } |
| |
| return Actions.ActOnFinishObjCImplementation(ObjCImpDecl, DeclsInGroup); |
| } |
| |
| Parser::DeclGroupPtrTy |
| Parser::ParseObjCAtEndDeclaration(SourceRange atEnd) { |
| assert(Tok.isObjCAtKeyword(tok::objc_end) && |
| "ParseObjCAtEndDeclaration(): Expected @end"); |
| ConsumeToken(); // the "end" identifier |
| if (CurParsedObjCImpl) |
| CurParsedObjCImpl->finish(atEnd); |
| else |
| // missing @implementation |
| Diag(atEnd.getBegin(), diag::err_expected_objc_container); |
| return nullptr; |
| } |
| |
| Parser::ObjCImplParsingDataRAII::~ObjCImplParsingDataRAII() { |
| if (!Finished) { |
| finish(P.Tok.getLocation()); |
| if (P.isEofOrEom()) { |
| P.Diag(P.Tok, diag::err_objc_missing_end) |
| << FixItHint::CreateInsertion(P.Tok.getLocation(), "\n@end\n"); |
| P.Diag(Dcl->getBeginLoc(), diag::note_objc_container_start) |
| << Sema::OCK_Implementation; |
| } |
| } |
| P.CurParsedObjCImpl = nullptr; |
| assert(LateParsedObjCMethods.empty()); |
| } |
| |
| void Parser::ObjCImplParsingDataRAII::finish(SourceRange AtEnd) { |
| assert(!Finished); |
| P.Actions.DefaultSynthesizeProperties(P.getCurScope(), Dcl, AtEnd.getBegin()); |
| for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i) |
| P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i], |
| true/*Methods*/); |
| |
| P.Actions.ActOnAtEnd(P.getCurScope(), AtEnd); |
| |
| if (HasCFunction) |
| for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i) |
| P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i], |
| false/*c-functions*/); |
| |
| /// Clear and free the cached objc methods. |
| for (LateParsedObjCMethodContainer::iterator |
| I = LateParsedObjCMethods.begin(), |
| E = LateParsedObjCMethods.end(); I != E; ++I) |
| delete *I; |
| LateParsedObjCMethods.clear(); |
| |
| Finished = true; |
| } |
| |
| /// compatibility-alias-decl: |
| /// @compatibility_alias alias-name class-name ';' |
| /// |
| Decl *Parser::ParseObjCAtAliasDeclaration(SourceLocation atLoc) { |
| assert(Tok.isObjCAtKeyword(tok::objc_compatibility_alias) && |
| "ParseObjCAtAliasDeclaration(): Expected @compatibility_alias"); |
| ConsumeToken(); // consume compatibility_alias |
| if (expectIdentifier()) |
| return nullptr; |
| IdentifierInfo *aliasId = Tok.getIdentifierInfo(); |
| SourceLocation aliasLoc = ConsumeToken(); // consume alias-name |
| if (expectIdentifier()) |
| return nullptr; |
| IdentifierInfo *classId = Tok.getIdentifierInfo(); |
| SourceLocation classLoc = ConsumeToken(); // consume class-name; |
| ExpectAndConsume(tok::semi, diag::err_expected_after, "@compatibility_alias"); |
| return Actions.ActOnCompatibilityAlias(atLoc, aliasId, aliasLoc, |
| classId, classLoc); |
| } |
| |
| /// property-synthesis: |
| /// @synthesize property-ivar-list ';' |
| /// |
| /// property-ivar-list: |
| /// property-ivar |
| /// property-ivar-list ',' property-ivar |
| /// |
| /// property-ivar: |
| /// identifier |
| /// identifier '=' identifier |
| /// |
| Decl *Parser::ParseObjCPropertySynthesize(SourceLocation atLoc) { |
| assert(Tok.isObjCAtKeyword(tok::objc_synthesize) && |
| "ParseObjCPropertySynthesize(): Expected '@synthesize'"); |
| ConsumeToken(); // consume synthesize |
| |
| while (true) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCPropertyDefinition(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::err_synthesized_property_name); |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| IdentifierInfo *propertyIvar = nullptr; |
| IdentifierInfo *propertyId = Tok.getIdentifierInfo(); |
| SourceLocation propertyLoc = ConsumeToken(); // consume property name |
| SourceLocation propertyIvarLoc; |
| if (TryConsumeToken(tok::equal)) { |
| // property '=' ivar-name |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCPropertySynthesizeIvar(getCurScope(), propertyId); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (expectIdentifier()) |
| break; |
| propertyIvar = Tok.getIdentifierInfo(); |
| propertyIvarLoc = ConsumeToken(); // consume ivar-name |
| } |
| Actions.ActOnPropertyImplDecl( |
| getCurScope(), atLoc, propertyLoc, true, |
| propertyId, propertyIvar, propertyIvarLoc, |
| ObjCPropertyQueryKind::OBJC_PR_query_unknown); |
| if (Tok.isNot(tok::comma)) |
| break; |
| ConsumeToken(); // consume ',' |
| } |
| ExpectAndConsume(tok::semi, diag::err_expected_after, "@synthesize"); |
| return nullptr; |
| } |
| |
| /// property-dynamic: |
| /// @dynamic property-list |
| /// |
| /// property-list: |
| /// identifier |
| /// property-list ',' identifier |
| /// |
| Decl *Parser::ParseObjCPropertyDynamic(SourceLocation atLoc) { |
| assert(Tok.isObjCAtKeyword(tok::objc_dynamic) && |
| "ParseObjCPropertyDynamic(): Expected '@dynamic'"); |
| ConsumeToken(); // consume dynamic |
| |
| bool isClassProperty = false; |
| if (Tok.is(tok::l_paren)) { |
| ConsumeParen(); |
| const IdentifierInfo *II = Tok.getIdentifierInfo(); |
| |
| if (!II) { |
| Diag(Tok, diag::err_objc_expected_property_attr) << II; |
| SkipUntil(tok::r_paren, StopAtSemi); |
| } else { |
| SourceLocation AttrName = ConsumeToken(); // consume attribute name |
| if (II->isStr("class")) { |
| isClassProperty = true; |
| if (Tok.isNot(tok::r_paren)) { |
| Diag(Tok, diag::err_expected) << tok::r_paren; |
| SkipUntil(tok::r_paren, StopAtSemi); |
| } else |
| ConsumeParen(); |
| } else { |
| Diag(AttrName, diag::err_objc_expected_property_attr) << II; |
| SkipUntil(tok::r_paren, StopAtSemi); |
| } |
| } |
| } |
| |
| while (true) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCPropertyDefinition(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| if (expectIdentifier()) { |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| IdentifierInfo *propertyId = Tok.getIdentifierInfo(); |
| SourceLocation propertyLoc = ConsumeToken(); // consume property name |
| Actions.ActOnPropertyImplDecl( |
| getCurScope(), atLoc, propertyLoc, false, |
| propertyId, nullptr, SourceLocation(), |
| isClassProperty ? ObjCPropertyQueryKind::OBJC_PR_query_class : |
| ObjCPropertyQueryKind::OBJC_PR_query_unknown); |
| |
| if (Tok.isNot(tok::comma)) |
| break; |
| ConsumeToken(); // consume ',' |
| } |
| ExpectAndConsume(tok::semi, diag::err_expected_after, "@dynamic"); |
| return nullptr; |
| } |
| |
| /// objc-throw-statement: |
| /// throw expression[opt]; |
| /// |
| StmtResult Parser::ParseObjCThrowStmt(SourceLocation atLoc) { |
| ExprResult Res; |
| ConsumeToken(); // consume throw |
| if (Tok.isNot(tok::semi)) { |
| Res = ParseExpression(); |
| if (Res.isInvalid()) { |
| SkipUntil(tok::semi); |
| return StmtError(); |
| } |
| } |
| // consume ';' |
| ExpectAndConsume(tok::semi, diag::err_expected_after, "@throw"); |
| return Actions.ActOnObjCAtThrowStmt(atLoc, Res.get(), getCurScope()); |
| } |
| |
| /// objc-synchronized-statement: |
| /// @synchronized '(' expression ')' compound-statement |
| /// |
| StmtResult |
| Parser::ParseObjCSynchronizedStmt(SourceLocation atLoc) { |
| ConsumeToken(); // consume synchronized |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(Tok, diag::err_expected_lparen_after) << "@synchronized"; |
| return StmtError(); |
| } |
| |
| // The operand is surrounded with parentheses. |
| ConsumeParen(); // '(' |
| ExprResult operand(ParseExpression()); |
| |
| if (Tok.is(tok::r_paren)) { |
| ConsumeParen(); // ')' |
| } else { |
| if (!operand.isInvalid()) |
| Diag(Tok, diag::err_expected) << tok::r_paren; |
| |
| // Skip forward until we see a left brace, but don't consume it. |
| SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch); |
| } |
| |
| // Require a compound statement. |
| if (Tok.isNot(tok::l_brace)) { |
| if (!operand.isInvalid()) |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| return StmtError(); |
| } |
| |
| // Check the @synchronized operand now. |
| if (!operand.isInvalid()) |
| operand = Actions.ActOnObjCAtSynchronizedOperand(atLoc, operand.get()); |
| |
| // Parse the compound statement within a new scope. |
| ParseScope bodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope); |
| StmtResult body(ParseCompoundStatementBody()); |
| bodyScope.Exit(); |
| |
| // If there was a semantic or parse error earlier with the |
| // operand, fail now. |
| if (operand.isInvalid()) |
| return StmtError(); |
| |
| if (body.isInvalid()) |
| body = Actions.ActOnNullStmt(Tok.getLocation()); |
| |
| return Actions.ActOnObjCAtSynchronizedStmt(atLoc, operand.get(), body.get()); |
| } |
| |
| /// objc-try-catch-statement: |
| /// @try compound-statement objc-catch-list[opt] |
| /// @try compound-statement objc-catch-list[opt] @finally compound-statement |
| /// |
| /// objc-catch-list: |
| /// @catch ( parameter-declaration ) compound-statement |
| /// objc-catch-list @catch ( catch-parameter-declaration ) compound-statement |
| /// catch-parameter-declaration: |
| /// parameter-declaration |
| /// '...' [OBJC2] |
| /// |
| StmtResult Parser::ParseObjCTryStmt(SourceLocation atLoc) { |
| bool catch_or_finally_seen = false; |
| |
| ConsumeToken(); // consume try |
| if (Tok.isNot(tok::l_brace)) { |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| return StmtError(); |
| } |
| StmtVector CatchStmts; |
| StmtResult FinallyStmt; |
| ParseScope TryScope(this, Scope::DeclScope | Scope::CompoundStmtScope); |
| StmtResult TryBody(ParseCompoundStatementBody()); |
| TryScope.Exit(); |
| if (TryBody.isInvalid()) |
| TryBody = Actions.ActOnNullStmt(Tok.getLocation()); |
| |
| while (Tok.is(tok::at)) { |
| // At this point, we need to lookahead to determine if this @ is the start |
| // of an @catch or @finally. We don't want to consume the @ token if this |
| // is an @try or @encode or something else. |
| Token AfterAt = GetLookAheadToken(1); |
| if (!AfterAt.isObjCAtKeyword(tok::objc_catch) && |
| !AfterAt.isObjCAtKeyword(tok::objc_finally)) |
| break; |
| |
| SourceLocation AtCatchFinallyLoc = ConsumeToken(); |
| if (Tok.isObjCAtKeyword(tok::objc_catch)) { |
| Decl *FirstPart = nullptr; |
| ConsumeToken(); // consume catch |
| if (Tok.is(tok::l_paren)) { |
| ConsumeParen(); |
| ParseScope CatchScope(this, Scope::DeclScope | |
| Scope::CompoundStmtScope | |
| Scope::AtCatchScope); |
| if (Tok.isNot(tok::ellipsis)) { |
| DeclSpec DS(AttrFactory); |
| ParseDeclarationSpecifiers(DS); |
| Declarator ParmDecl(DS, DeclaratorContext::ObjCCatchContext); |
| ParseDeclarator(ParmDecl); |
| |
| // Inform the actions module about the declarator, so it |
| // gets added to the current scope. |
| FirstPart = Actions.ActOnObjCExceptionDecl(getCurScope(), ParmDecl); |
| } else |
| ConsumeToken(); // consume '...' |
| |
| SourceLocation RParenLoc; |
| |
| if (Tok.is(tok::r_paren)) |
| RParenLoc = ConsumeParen(); |
| else // Skip over garbage, until we get to ')'. Eat the ')'. |
| SkipUntil(tok::r_paren, StopAtSemi); |
| |
| StmtResult CatchBody(true); |
| if (Tok.is(tok::l_brace)) |
| CatchBody = ParseCompoundStatementBody(); |
| else |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| if (CatchBody.isInvalid()) |
| CatchBody = Actions.ActOnNullStmt(Tok.getLocation()); |
| |
| StmtResult Catch = Actions.ActOnObjCAtCatchStmt(AtCatchFinallyLoc, |
| RParenLoc, |
| FirstPart, |
| CatchBody.get()); |
| if (!Catch.isInvalid()) |
| CatchStmts.push_back(Catch.get()); |
| |
| } else { |
| Diag(AtCatchFinallyLoc, diag::err_expected_lparen_after) |
| << "@catch clause"; |
| return StmtError(); |
| } |
| catch_or_finally_seen = true; |
| } else { |
| assert(Tok.isObjCAtKeyword(tok::objc_finally) && "Lookahead confused?"); |
| ConsumeToken(); // consume finally |
| ParseScope FinallyScope(this, |
| Scope::DeclScope | Scope::CompoundStmtScope); |
| |
| bool ShouldCapture = |
| getTargetInfo().getTriple().isWindowsMSVCEnvironment(); |
| if (ShouldCapture) |
| Actions.ActOnCapturedRegionStart(Tok.getLocation(), getCurScope(), |
| CR_ObjCAtFinally, 1); |
| |
| StmtResult FinallyBody(true); |
| if (Tok.is(tok::l_brace)) |
| FinallyBody = ParseCompoundStatementBody(); |
| else |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| |
| if (FinallyBody.isInvalid()) { |
| FinallyBody = Actions.ActOnNullStmt(Tok.getLocation()); |
| if (ShouldCapture) |
| Actions.ActOnCapturedRegionError(); |
| } else if (ShouldCapture) { |
| FinallyBody = Actions.ActOnCapturedRegionEnd(FinallyBody.get()); |
| } |
| |
| FinallyStmt = Actions.ActOnObjCAtFinallyStmt(AtCatchFinallyLoc, |
| FinallyBody.get()); |
| catch_or_finally_seen = true; |
| break; |
| } |
| } |
| if (!catch_or_finally_seen) { |
| Diag(atLoc, diag::err_missing_catch_finally); |
| return StmtError(); |
| } |
| |
| return Actions.ActOnObjCAtTryStmt(atLoc, TryBody.get(), |
| CatchStmts, |
| FinallyStmt.get()); |
| } |
| |
| /// objc-autoreleasepool-statement: |
| /// @autoreleasepool compound-statement |
| /// |
| StmtResult |
| Parser::ParseObjCAutoreleasePoolStmt(SourceLocation atLoc) { |
| ConsumeToken(); // consume autoreleasepool |
| if (Tok.isNot(tok::l_brace)) { |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| return StmtError(); |
| } |
| // Enter a scope to hold everything within the compound stmt. Compound |
| // statements can always hold declarations. |
| ParseScope BodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope); |
| |
| StmtResult AutoreleasePoolBody(ParseCompoundStatementBody()); |
| |
| BodyScope.Exit(); |
| if (AutoreleasePoolBody.isInvalid()) |
| AutoreleasePoolBody = Actions.ActOnNullStmt(Tok.getLocation()); |
| return Actions.ActOnObjCAutoreleasePoolStmt(atLoc, |
| AutoreleasePoolBody.get()); |
| } |
| |
| /// StashAwayMethodOrFunctionBodyTokens - Consume the tokens and store them |
| /// for later parsing. |
| void Parser::StashAwayMethodOrFunctionBodyTokens(Decl *MDecl) { |
| if (SkipFunctionBodies && (!MDecl || Actions.canSkipFunctionBody(MDecl)) && |
| trySkippingFunctionBody()) { |
| Actions.ActOnSkippedFunctionBody(MDecl); |
| return; |
| } |
| |
| LexedMethod* LM = new LexedMethod(this, MDecl); |
| CurParsedObjCImpl->LateParsedObjCMethods.push_back(LM); |
| CachedTokens &Toks = LM->Toks; |
| // Begin by storing the '{' or 'try' or ':' token. |
| Toks.push_back(Tok); |
| if (Tok.is(tok::kw_try)) { |
| ConsumeToken(); |
| if (Tok.is(tok::colon)) { |
| Toks.push_back(Tok); |
| ConsumeToken(); |
| while (Tok.isNot(tok::l_brace)) { |
| ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false); |
| ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false); |
| } |
| } |
| Toks.push_back(Tok); // also store '{' |
| } |
| else if (Tok.is(tok::colon)) { |
| ConsumeToken(); |
| // FIXME: This is wrong, due to C++11 braced initialization. |
| while (Tok.isNot(tok::l_brace)) { |
| ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false); |
| ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false); |
| } |
| Toks.push_back(Tok); // also store '{' |
| } |
| ConsumeBrace(); |
| // Consume everything up to (and including) the matching right brace. |
| ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); |
| while (Tok.is(tok::kw_catch)) { |
| ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false); |
| ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); |
| } |
| } |
| |
| /// objc-method-def: objc-method-proto ';'[opt] '{' body '}' |
| /// |
| Decl *Parser::ParseObjCMethodDefinition() { |
| Decl *MDecl = ParseObjCMethodPrototype(); |
| |
| PrettyDeclStackTraceEntry CrashInfo(Actions.Context, MDecl, Tok.getLocation(), |
| "parsing Objective-C method"); |
| |
| // parse optional ';' |
| if (Tok.is(tok::semi)) { |
| if (CurParsedObjCImpl) { |
| Diag(Tok, diag::warn_semicolon_before_method_body) |
| << FixItHint::CreateRemoval(Tok.getLocation()); |
| } |
| ConsumeToken(); |
| } |
| |
| // We should have an opening brace now. |
| if (Tok.isNot(tok::l_brace)) { |
| Diag(Tok, diag::err_expected_method_body); |
| |
| // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch); |
| |
| // If we didn't find the '{', bail out. |
| if (Tok.isNot(tok::l_brace)) |
| return nullptr; |
| } |
| |
| if (!MDecl) { |
| ConsumeBrace(); |
| SkipUntil(tok::r_brace); |
| return nullptr; |
| } |
| |
| // Allow the rest of sema to find private method decl implementations. |
| Actions.AddAnyMethodToGlobalPool(MDecl); |
| assert (CurParsedObjCImpl |
| && "ParseObjCMethodDefinition - Method out of @implementation"); |
| // Consume the tokens and store them for later parsing. |
| StashAwayMethodOrFunctionBodyTokens(MDecl); |
| return MDecl; |
| } |
| |
| StmtResult Parser::ParseObjCAtStatement(SourceLocation AtLoc, |
| ParsedStmtContext StmtCtx) { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteObjCAtStatement(getCurScope()); |
| cutOffParsing(); |
| return StmtError(); |
| } |
| |
| if (Tok.isObjCAtKeyword(tok::objc_try)) |
| return ParseObjCTryStmt(AtLoc); |
| |
| if (Tok.isObjCAtKeyword(tok::objc_throw)) |
| return ParseObjCThrowStmt(AtLoc); |
| |
| if (Tok.isObjCAtKeyword(tok::objc_synchronized)) |
| return ParseObjCSynchronizedStmt(AtLoc); |
| |
| if (Tok.isObjCAtKeyword(tok::objc_autoreleasepool)) |
| return ParseObjCAutoreleasePoolStmt(AtLoc); |
| |
| if (Tok.isObjCAtKeyword(tok::objc_import) && |
| getLangOpts().DebuggerSupport) { |
| SkipUntil(tok::semi); |
| return Actions.ActOnNullStmt(Tok.getLocation()); |
| } |
| |
| ExprStatementTokLoc = AtLoc; |
| ExprResult Res(ParseExpressionWithLeadingAt(AtLoc)); |
| if (Res.isInvalid()) { |
| // If the expression is invalid, skip ahead to the next semicolon. Not |
| // doing this opens us up to the possibility of infinite loops if |
| // ParseExpression does not consume any tokens. |
| SkipUntil(tok::semi); |
| return StmtError(); |
| } |
| |
| // Otherwise, eat the semicolon. |
| ExpectAndConsumeSemi(diag::err_expected_semi_after_expr); |
| return handleExprStmt(Res, StmtCtx); |
| } |
| |
| ExprResult Parser::ParseObjCAtExpression(SourceLocation AtLoc) { |
| switch (Tok.getKind()) { |
| case tok::code_completion: |
| Actions.CodeCompleteObjCAtExpression(getCurScope()); |
| cutOffParsing(); |
| return ExprError(); |
| |
| case tok::minus: |
| case tok::plus: { |
| tok::TokenKind Kind = Tok.getKind(); |
| SourceLocation OpLoc = ConsumeToken(); |
| |
| if (!Tok.is(tok::numeric_constant)) { |
| const char *Symbol = nullptr; |
| switch (Kind) { |
| case tok::minus: Symbol = "-"; break; |
| case tok::plus: Symbol = "+"; break; |
| default: llvm_unreachable("missing unary operator case"); |
| } |
| Diag(Tok, diag::err_nsnumber_nonliteral_unary) |
| << Symbol; |
| return ExprError(); |
| } |
| |
| ExprResult Lit(Actions.ActOnNumericConstant(Tok)); |
| if (Lit.isInvalid()) { |
| return Lit; |
| } |
| ConsumeToken(); // Consume the literal token. |
| |
| Lit = Actions.ActOnUnaryOp(getCurScope(), OpLoc, Kind, Lit.get()); |
| if (Lit.isInvalid()) |
| return Lit; |
| |
| return ParsePostfixExpressionSuffix( |
| Actions.BuildObjCNumericLiteral(AtLoc, Lit.get())); |
| } |
| |
| case tok::string_literal: // primary-expression: string-literal |
| case tok::wide_string_literal: |
| return ParsePostfixExpressionSuffix(ParseObjCStringLiteral(AtLoc)); |
| |
| case tok::char_constant: |
| return ParsePostfixExpressionSuffix(ParseObjCCharacterLiteral(AtLoc)); |
| |
| case tok::numeric_constant: |
| return ParsePostfixExpressionSuffix(ParseObjCNumericLiteral(AtLoc)); |
| |
| case tok::kw_true: // Objective-C++, etc. |
| case tok::kw___objc_yes: // c/c++/objc/objc++ __objc_yes |
| return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, true)); |
| case tok::kw_false: // Objective-C++, etc. |
| case tok::kw___objc_no: // c/c++/objc/objc++ __objc_no |
| return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, false)); |
| |
| case tok::l_square: |
| // Objective-C array literal |
| return ParsePostfixExpressionSuffix(ParseObjCArrayLiteral(AtLoc)); |
| |
| case tok::l_brace: |
| // Objective-C dictionary literal |
| return ParsePostfixExpressionSuffix(ParseObjCDictionaryLiteral(AtLoc)); |
| |
| case tok::l_paren: |
| // Objective-C boxed expression |
| return ParsePostfixExpressionSuffix(ParseObjCBoxedExpr(AtLoc)); |
| |
| default: |
| if (Tok.getIdentifierInfo() == nullptr) |
| return ExprError(Diag(AtLoc, diag::err_unexpected_at)); |
| |
| switch (Tok.getIdentifierInfo()->getObjCKeywordID()) { |
| case tok::objc_encode: |
| return ParsePostfixExpressionSuffix(ParseObjCEncodeExpression(AtLoc)); |
| case tok::objc_protocol: |
| return ParsePostfixExpressionSuffix(ParseObjCProtocolExpression(AtLoc)); |
| case tok::objc_selector: |
| return ParsePostfixExpressionSuffix(ParseObjCSelectorExpression(AtLoc)); |
| case tok::objc_available: |
| return ParseAvailabilityCheckExpr(AtLoc); |
| default: { |
| const char *str = nullptr; |
| // Only provide the @try/@finally/@autoreleasepool fixit when we're sure |
| // that this is a proper statement where such directives could actually |
| // occur. |
| if (GetLookAheadToken(1).is(tok::l_brace) && |
| ExprStatementTokLoc == AtLoc) { |
| char ch = Tok.getIdentifierInfo()->getNameStart()[0]; |
| str = |
| ch == 't' ? "try" |
| : (ch == 'f' ? "finally" |
| : (ch == 'a' ? "autoreleasepool" : nullptr)); |
| } |
| if (str) { |
| SourceLocation kwLoc = Tok.getLocation(); |
| return ExprError(Diag(AtLoc, diag::err_unexpected_at) << |
| FixItHint::CreateReplacement(kwLoc, str)); |
| } |
| else |
| return ExprError(Diag(AtLoc, diag::err_unexpected_at)); |
| } |
| } |
| } |
| } |
| |
| /// Parse the receiver of an Objective-C++ message send. |
| /// |
| /// This routine parses the receiver of a message send in |
| /// Objective-C++ either as a type or as an expression. Note that this |
| /// routine must not be called to parse a send to 'super', since it |
| /// has no way to return such a result. |
| /// |
| /// \param IsExpr Whether the receiver was parsed as an expression. |
| /// |
| /// \param TypeOrExpr If the receiver was parsed as an expression (\c |
| |