forked from qt-creator/qt-creator
5d45e0b69a
A case or a default statement must be followed by another statement. When a such a case (or default) statement is followed immediately by another case (or default) statement, then this would create a linked list, and the parser will recurse to parse such input. In order to prevent the parser running out of stack space while recursing, parse this corner case by blocking parsing a labeled statement as the first statement after a labeled statement. The advantage is that these statements do not form a linked list, so any subsequent visitation of the AST won't run out of stack space either. Change-Id: Id2111a49509132997f5fbe4bb12c92c729ec2522 Task-number: QTCREATORBUG-12673 Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
339 lines
16 KiB
C++
339 lines
16 KiB
C++
// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef CPLUSPLUS_PARSER_H
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#define CPLUSPLUS_PARSER_H
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#include "CPlusPlusForwardDeclarations.h"
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#include "ASTfwd.h"
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#include "Token.h"
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#include "TranslationUnit.h"
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#include "MemoryPool.h"
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#include <map>
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namespace CPlusPlus {
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class CPLUSPLUS_EXPORT Parser
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{
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public:
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Parser(TranslationUnit *translationUnit);
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~Parser();
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bool parseTranslationUnit(TranslationUnitAST *&node);
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public:
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bool parseExpressionList(ExpressionListAST *&node);
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bool parseAbstractCoreDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list);
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bool parseAbstractDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list);
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bool parseEmptyDeclaration(DeclarationAST *&node);
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bool parseAccessDeclaration(DeclarationAST *&node);
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bool parseQtPropertyDeclaration(DeclarationAST *&node);
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bool parseQtEnumDeclaration(DeclarationAST *&node);
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bool parseQtFlags(DeclarationAST *&node);
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bool parseQtInterfaces(DeclarationAST *&node);
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bool parseAdditiveExpression(ExpressionAST *&node);
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bool parseAndExpression(ExpressionAST *&node);
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bool parseAsmDefinition(DeclarationAST *&node);
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bool parseAsmOperandList();
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bool parseAsmOperand();
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bool parseAsmClobberList();
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bool parseAssignmentExpression(ExpressionAST *&node);
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bool parseBaseClause(BaseSpecifierListAST *&node);
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bool parseBaseSpecifier(BaseSpecifierListAST *&node);
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bool parseBlockDeclaration(DeclarationAST *&node);
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bool parseCppCastExpression(ExpressionAST *&node);
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bool parseCastExpression(ExpressionAST *&node);
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bool parseClassSpecifier(SpecifierListAST *&node);
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bool parseCommaExpression(ExpressionAST *&node);
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bool parseCompoundStatement(StatementAST *&node);
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bool parseBreakStatement(StatementAST *&node);
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bool parseContinueStatement(StatementAST *&node);
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bool parseGotoStatement(StatementAST *&node);
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bool parseReturnStatement(StatementAST *&node);
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bool parseCondition(ExpressionAST *&node);
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bool parseConditionalExpression(ExpressionAST *&node);
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bool parseConstantExpression(ExpressionAST *&node);
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bool parseCtorInitializer(CtorInitializerAST *&node);
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bool parseCvQualifiers(SpecifierListAST *&node);
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bool parseRefQualifier(unsigned &ref_qualifier);
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bool parseOverrideFinalQualifiers(SpecifierListAST *&node);
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bool parseDeclaratorOrAbstractDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list);
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bool parseDeclaration(DeclarationAST *&node);
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bool parseSimpleDeclaration(DeclarationAST *&node, ClassSpecifierAST *declaringClass = 0);
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bool parseDeclarationStatement(StatementAST *&node);
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bool parseCoreDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list, ClassSpecifierAST *declaringClass);
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bool parseDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list, ClassSpecifierAST *declaringClass = 0);
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bool parseDeleteExpression(ExpressionAST *&node);
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bool parseDoStatement(StatementAST *&node);
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bool parseElaboratedTypeSpecifier(SpecifierListAST *&node);
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bool parseEnumSpecifier(SpecifierListAST *&node);
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bool parseEnumerator(EnumeratorListAST *&node);
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bool parseEqualityExpression(ExpressionAST *&node);
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bool parseExceptionDeclaration(ExceptionDeclarationAST *&node);
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bool parseExceptionSpecification(ExceptionSpecificationAST *&node);
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bool parseExclusiveOrExpression(ExpressionAST *&node);
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bool parseExpression(ExpressionAST *&node);
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bool parseExpressionOrDeclarationStatement(StatementAST *&node);
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bool parseExpressionStatement(StatementAST *&node);
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bool parseForInitStatement(StatementAST *&node);
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bool parseForeachStatement(StatementAST *&node);
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bool parseForStatement(StatementAST *&node);
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bool parseFunctionBody(StatementAST *&node);
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bool parseIfStatement(StatementAST *&node);
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bool parseInclusiveOrExpression(ExpressionAST *&node);
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bool parseInitDeclarator(DeclaratorAST *&node, SpecifierListAST *decl_specifier_list, ClassSpecifierAST *declaringClass);
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bool parseInitializerList(ExpressionListAST *&node);
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bool parseInitializer(ExpressionAST *&node, unsigned *equals_token);
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bool parseInitializerClause(ExpressionAST *&node);
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bool parseLabeledStatement(StatementAST *&node);
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bool parseLinkageBody(DeclarationAST *&node);
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bool parseLinkageSpecification(DeclarationAST *&node);
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bool parseLogicalAndExpression(ExpressionAST *&node);
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bool parseLogicalOrExpression(ExpressionAST *&node);
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bool parseMemInitializer(MemInitializerListAST *&node);
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bool parseMemInitializerList(MemInitializerListAST *&node);
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bool parseMemberSpecification(DeclarationAST *&node, ClassSpecifierAST *declaringClass);
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bool parseMultiplicativeExpression(ExpressionAST *&node);
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bool parseTemplateId(NameAST *&node, unsigned template_token = 0);
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bool parseClassOrNamespaceName(NameAST *&node);
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bool parseNameId(NameAST *&node);
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bool parseName(NameAST *&node, bool acceptTemplateId = true);
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bool parseNestedNameSpecifier(NestedNameSpecifierListAST *&node, bool acceptTemplateId);
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bool parseNestedNameSpecifierOpt(NestedNameSpecifierListAST *&name, bool acceptTemplateId);
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bool parseStaticAssertDeclaration(DeclarationAST *&node);
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bool parseNamespace(DeclarationAST *&node);
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bool parseNamespaceAliasDefinition(DeclarationAST *&node);
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bool parseNewArrayDeclarator(NewArrayDeclaratorListAST *&node);
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bool parseNewExpression(ExpressionAST *&node);
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bool parseExpressionListParen(ExpressionAST *&node);
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bool parseNewInitializer(ExpressionAST *&node);
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bool parseNewTypeId(NewTypeIdAST *&node);
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bool parseOperator(OperatorAST *&node);
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bool parseConversionFunctionId(NameAST *&node);
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bool parseOperatorFunctionId(NameAST *&node);
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bool parseParameterDeclaration(ParameterDeclarationAST *&node);
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bool parseParameterDeclarationClause(ParameterDeclarationClauseAST *&node);
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bool parseParameterDeclarationList(ParameterDeclarationListAST *&node);
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bool parsePmExpression(ExpressionAST *&node);
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bool parseTypeidExpression(ExpressionAST *&node);
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bool parseTypenameCallExpression(ExpressionAST *&node);
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bool parseCorePostfixExpression(ExpressionAST *&node);
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bool parsePostfixExpression(ExpressionAST *&node);
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bool parsePostfixExpressionInternal(ExpressionAST *&node);
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bool parsePrimaryExpression(ExpressionAST *&node);
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bool parseNestedExpression(ExpressionAST *&node);
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bool parsePtrOperator(PtrOperatorListAST *&node);
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bool parseRelationalExpression(ExpressionAST *&node);
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bool parseShiftExpression(ExpressionAST *&node);
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bool parseStatement(StatementAST *&node, bool blockLabeledStatement = false);
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bool parseThisExpression(ExpressionAST *&node);
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bool parseBoolLiteral(ExpressionAST *&node);
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bool parseNumericLiteral(ExpressionAST *&node);
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bool parsePointerLiteral(ExpressionAST *&node);
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bool parseStringLiteral(ExpressionAST *&node);
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bool parseSwitchStatement(StatementAST *&node);
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bool parseTemplateArgument(ExpressionAST *&node);
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bool parseTemplateArgumentList(ExpressionListAST *&node);
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bool parseTemplateDeclaration(DeclarationAST *&node);
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bool parseTemplateParameter(DeclarationAST *&node);
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bool parseTemplateParameterList(DeclarationListAST *&node);
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bool parseThrowExpression(ExpressionAST *&node);
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bool parseTryBlockStatement(StatementAST *&node, CtorInitializerAST **placeholder);
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bool parseCatchClause(CatchClauseListAST *&node);
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bool parseTypeId(ExpressionAST *&node);
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bool parseTypeIdList(ExpressionListAST *&node);
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bool parseTypenameTypeParameter(DeclarationAST *&node);
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bool parseTemplateTypeParameter(DeclarationAST *&node);
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bool parseTypeParameter(DeclarationAST *&node);
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bool parseBuiltinTypeSpecifier(SpecifierListAST *&node);
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bool parseAttributeSpecifier(SpecifierListAST *&node);
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bool parseAttributeList(AttributeListAST *&node);
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bool parseDeclSpecifierSeq(SpecifierListAST *&node,
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bool noStorageSpecifiers = false,
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bool onlySimpleTypeSpecifiers = false);
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bool parseTrailingTypeSpecifierSeq(SpecifierListAST *&node)
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{ return parseDeclSpecifierSeq(node, true); }
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/// This actually parses a trailing-type-specifier sequence
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bool parseTypeSpecifier(SpecifierListAST *&node)
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{ return parseTrailingTypeSpecifierSeq(node); }
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bool parseSimpleTypeSpecifier(SpecifierListAST *&node)
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{ return parseDeclSpecifierSeq(node, true, true); }
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bool parseUnaryExpression(ExpressionAST *&node);
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bool parseUnqualifiedName(NameAST *&node, bool acceptTemplateId = true);
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bool parseUsing(DeclarationAST *&node);
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bool parseUsingDirective(DeclarationAST *&node);
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bool parseAliasDeclaration(DeclarationAST *&node);
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bool parseWhileStatement(StatementAST *&node);
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void parseExpressionWithOperatorPrecedence(ExpressionAST *&lhs, int minPrecedence);
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// Qt MOC run
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bool parseQtMethod(ExpressionAST *&node);
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// C++0x
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bool parseInitializer0x(ExpressionAST *&node, unsigned *equals_token);
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bool parseBraceOrEqualInitializer0x(ExpressionAST *&node);
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bool parseInitializerClause0x(ExpressionAST *&node);
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bool parseInitializerList0x(ExpressionListAST *&node);
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bool parseBracedInitList0x(ExpressionAST *&node);
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bool parseLambdaExpression(ExpressionAST *&node);
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bool parseLambdaIntroducer(LambdaIntroducerAST *&node);
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bool parseLambdaCapture(LambdaCaptureAST *&node);
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bool parseLambdaDeclarator(LambdaDeclaratorAST *&node);
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bool parseCapture(CaptureAST *&node);
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bool parseCaptureList(CaptureListAST *&node);
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bool parseTrailingReturnType(TrailingReturnTypeAST *&node);
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// ObjC++
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bool parseObjCExpression(ExpressionAST *&node);
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bool parseObjCClassForwardDeclaration(DeclarationAST *&node);
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bool parseObjCInterface(DeclarationAST *&node,
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SpecifierListAST *attributes = 0);
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bool parseObjCProtocol(DeclarationAST *&node,
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SpecifierListAST *attributes = 0);
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bool parseObjCTryStatement(StatementAST *&node);
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bool parseObjCSynchronizedStatement(StatementAST *&node);
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bool parseObjCThrowStatement(StatementAST *&node);
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bool parseObjCEncodeExpression(ExpressionAST *&node);
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bool parseObjCProtocolExpression(ExpressionAST *&node);
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bool parseObjCSelectorExpression(ExpressionAST *&node);
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bool parseObjCStringLiteral(ExpressionAST *&node);
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bool parseObjCMessageExpression(ExpressionAST *&node);
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bool parseObjCMessageReceiver(ExpressionAST *&node);
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bool parseObjCMessageArguments(ObjCSelectorAST *&selNode, ObjCMessageArgumentListAST *& argNode);
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bool parseObjCSelectorArg(ObjCSelectorArgumentAST *&selNode, ObjCMessageArgumentAST *&argNode);
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bool parseObjCMethodDefinitionList(DeclarationListAST *&node);
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bool parseObjCMethodDefinition(DeclarationAST *&node);
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bool parseObjCProtocolRefs(ObjCProtocolRefsAST *&node);
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bool parseObjClassInstanceVariables(ObjCInstanceVariablesDeclarationAST *&node);
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bool parseObjCInterfaceMemberDeclaration(DeclarationAST *&node);
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bool parseObjCInstanceVariableDeclaration(DeclarationAST *&node);
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bool parseObjCPropertyDeclaration(DeclarationAST *&node,
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SpecifierListAST *attributes = 0);
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bool parseObjCImplementation(DeclarationAST *&node);
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bool parseObjCMethodPrototype(ObjCMethodPrototypeAST *&node);
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bool parseObjCPropertyAttribute(ObjCPropertyAttributeAST *&node);
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bool parseObjCTypeName(ObjCTypeNameAST *&node);
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bool parseObjCSelector(unsigned &selector_token);
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bool parseObjCKeywordDeclaration(ObjCSelectorArgumentAST *&argument, ObjCMessageArgumentDeclarationAST *&node);
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bool parseObjCTypeQualifiers(unsigned &type_qualifier);
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bool peekAtObjCContextKeyword(int kind);
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bool parseObjCContextKeyword(int kind, unsigned &in_token);
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bool lookAtObjCSelector() const;
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// c99
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bool parseDesignatedInitializerList(ExpressionListAST *&node);
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bool parseDesignatedInitializer(ExpressionAST *&node);
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bool parseDesignator(DesignatorAST *&node);
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bool skipUntil(int token);
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void skipUntilDeclaration();
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bool skipUntilStatement();
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bool skip(int l, int r);
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int find(int token, int stopAt);
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bool lookAtTypeParameter();
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bool lookAtCVQualifier() const;
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bool lookAtFunctionSpecifier() const;
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bool lookAtStorageClassSpecifier() const;
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bool lookAtBuiltinTypeSpecifier() const;
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bool lookAtClassKey() const;
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const Identifier *className(ClassSpecifierAST *ast) const;
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const Identifier *identifier(NameAST *name) const;
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void match(int kind, unsigned *token);
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bool maybeAmbiguousStatement(DeclarationStatementAST *ast, StatementAST *&node);
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bool maybeForwardOrClassDeclaration(SpecifierListAST *decl_specifier_seq) const;
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int peekAtQtContextKeyword() const;
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bool switchTemplateArguments(bool templateArguments);
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bool maybeSplitGreaterGreaterToken(int n = 1);
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bool blockErrors(bool block) { return _translationUnit->blockErrors(block); }
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void warning(unsigned index, const char *format, ...);
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void error(unsigned index, const char *format, ...);
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void fatal(unsigned index, const char *format, ...);
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inline const Token &tok(int i = 1) const
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{ return _translationUnit->tokenAt(_tokenIndex + i - 1); }
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inline int LA(int n = 1) const
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{ return _translationUnit->tokenKind(_tokenIndex + n - 1); }
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inline int consumeToken()
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{ return _tokenIndex++; }
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inline unsigned cursor() const
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{ return _tokenIndex; }
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void rewind(unsigned cursor);
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struct TemplateArgumentListEntry {
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unsigned index;
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unsigned cursor;
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ExpressionListAST *ast;
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TemplateArgumentListEntry(unsigned index = 0, unsigned cursor = 0, ExpressionListAST *ast = 0)
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: index(index), cursor(cursor), ast(ast) {}
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};
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TemplateArgumentListEntry *templateArgumentListEntry(unsigned tokenIndex);
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void clearTemplateArgumentList() { _templateArgumentList.clear(); }
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private:
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TranslationUnit *_translationUnit;
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Control *_control;
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MemoryPool *_pool;
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LanguageFeatures _languageFeatures;
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unsigned _tokenIndex;
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bool _templateArguments: 1;
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bool _inFunctionBody: 1;
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bool _inObjCImplementationContext: 1;
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bool _inExpressionStatement: 1;
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int _expressionDepth;
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int _statementDepth;
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MemoryPool _expressionStatementTempPool;
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std::map<unsigned, TemplateArgumentListEntry> _templateArgumentList;
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class Rewind;
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friend class Rewind;
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private:
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Parser(const Parser& source);
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void operator =(const Parser& source);
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};
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} // namespace CPlusPlus
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#endif // CPLUSPLUS_PARSER_H
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