forked from jasder/antlr
adding left-recursive parser
[git-p4: depot-paths = "//depot/code/antlr4/main/": change = 9467]
This commit is contained in:
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parent
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36a7597bcf
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@ -0,0 +1,615 @@
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ûparser grammar JavaParserLR;
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options {tokenVocab=JavaLexer;}
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// starting point for parsing a java file
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/* The annotations are separated out to make parsing faster, but must be associated with
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a packageDeclaration or a typeDeclaration (and not an empty one). */
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compilationUnit
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: annotations
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( packageDeclaration importDeclaration* typeDeclaration*
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| classOrInterfaceDeclaration typeDeclaration*
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)
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| packageDeclaration? importDeclaration* typeDeclaration*
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;
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packageDeclaration
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: 'package' qualifiedName ';'
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;
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importDeclaration
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: 'import' 'static'? qualifiedName ('.' '*')? ';'
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;
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typeDeclaration
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: classOrInterfaceDeclaration
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| ';'
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;
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classOrInterfaceDeclaration
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: classOrInterfaceModifiers (classDeclaration | interfaceDeclaration)
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;
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classOrInterfaceModifiers
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: classOrInterfaceModifier*
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;
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classOrInterfaceModifier
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: annotation // class or interface
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| 'public' // class or interface
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| 'protected' // class or interface
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| 'private' // class or interface
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| 'abstract' // class or interface
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| 'static' // class or interface
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| 'final' // class only -- does not apply to interfaces
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| 'strictfp' // class or interface
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;
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modifiers
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: modifier*
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;
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classDeclaration
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: normalClassDeclaration
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| enumDeclaration
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;
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normalClassDeclaration
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: 'class' Identifier typeParameters?
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('extends' type)?
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('implements' typeList)?
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classBody
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;
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typeParameters
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: '<' typeParameter (',' typeParameter)* '>'
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;
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typeParameter
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: Identifier ('extends' typeBound)?
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;
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typeBound
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: type ('&' type)*
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;
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enumDeclaration
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: ENUM Identifier ('implements' typeList)? enumBody
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;
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enumBody
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: '{' enumConstants? ','? enumBodyDeclarations? '}'
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;
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enumConstants
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: enumConstant (',' enumConstant)*
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;
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enumConstant
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: annotations? Identifier arguments? classBody?
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;
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enumBodyDeclarations
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: ';' (classBodyDeclaration)*
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;
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interfaceDeclaration
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: normalInterfaceDeclaration
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| annotationTypeDeclaration
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;
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normalInterfaceDeclaration
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: 'interface' Identifier typeParameters? ('extends' typeList)? interfaceBody
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;
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typeList
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: type (',' type)*
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;
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classBody
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: '{' classBodyDeclaration* '}'
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;
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interfaceBody
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: '{' interfaceBodyDeclaration* '}'
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;
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classBodyDeclaration
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: ';'
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| 'static'? block
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| modifiers memberDecl
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;
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memberDecl
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: genericMethodOrConstructorDecl
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| memberDeclaration
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| 'void' Identifier voidMethodDeclaratorRest
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| Identifier constructorDeclaratorRest
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| interfaceDeclaration
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| classDeclaration
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;
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memberDeclaration
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: type (methodDeclaration | fieldDeclaration)
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;
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genericMethodOrConstructorDecl
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: typeParameters genericMethodOrConstructorRest
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;
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genericMethodOrConstructorRest
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: (type | 'void') Identifier methodDeclaratorRest
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| Identifier constructorDeclaratorRest
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;
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methodDeclaration
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: Identifier methodDeclaratorRest
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;
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fieldDeclaration
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: variableDeclarators ';'
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;
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interfaceBodyDeclaration
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: modifiers interfaceMemberDecl
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| ';'
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;
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interfaceMemberDecl
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: interfaceMethodOrFieldDecl
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| interfaceGenericMethodDecl
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| 'void' Identifier voidInterfaceMethodDeclaratorRest
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| interfaceDeclaration
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| classDeclaration
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;
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interfaceMethodOrFieldDecl
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: type Identifier interfaceMethodOrFieldRest
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;
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interfaceMethodOrFieldRest
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: constantDeclaratorsRest ';'
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| interfaceMethodDeclaratorRest
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;
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methodDeclaratorRest
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: formalParameters ('[' ']')*
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('throws' qualifiedNameList)?
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( methodBody
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| ';'
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)
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;
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voidMethodDeclaratorRest
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: formalParameters ('throws' qualifiedNameList)?
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( methodBody
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| ';'
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)
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;
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interfaceMethodDeclaratorRest
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: formalParameters ('[' ']')* ('throws' qualifiedNameList)? ';'
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;
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interfaceGenericMethodDecl
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: typeParameters (type | 'void') Identifier
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interfaceMethodDeclaratorRest
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;
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voidInterfaceMethodDeclaratorRest
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: formalParameters ('throws' qualifiedNameList)? ';'
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;
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constructorDeclaratorRest
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: formalParameters ('throws' qualifiedNameList)? constructorBody
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;
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constantDeclarator
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: Identifier constantDeclaratorRest
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;
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variableDeclarators
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: variableDeclarator (',' variableDeclarator)*
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;
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variableDeclarator
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: variableDeclaratorId ('=' variableInitializer)?
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;
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constantDeclaratorsRest
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: constantDeclaratorRest (',' constantDeclarator)*
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;
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constantDeclaratorRest
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: ('[' ']')* '=' variableInitializer
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;
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variableDeclaratorId
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: Identifier ('[' ']')*
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;
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variableInitializer
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: arrayInitializer
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| expression
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;
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arrayInitializer
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: '{' (variableInitializer (',' variableInitializer)* (',')? )? '}'
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;
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modifier
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: annotation
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| 'public'
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| 'protected'
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| 'private'
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| 'static'
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| 'abstract'
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| 'final'
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| 'native'
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| 'synchronized'
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| 'transient'
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| 'volatile'
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| 'strictfp'
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;
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packageOrTypeName
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: qualifiedName
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;
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enumConstantName
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: Identifier
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;
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typeName
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: qualifiedName
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;
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type
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: classOrInterfaceType ('[' ']')*
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| primitiveType ('[' ']')*
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;
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classOrInterfaceType
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: Identifier typeArguments? ('.' Identifier typeArguments? )*
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;
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primitiveType
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: 'boolean'
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| 'char'
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| 'byte'
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| 'short'
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| 'int'
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| 'long'
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| 'float'
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| 'double'
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;
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variableModifier
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: 'final'
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| annotation
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;
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typeArguments
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: '<' typeArgument (',' typeArgument)* '>'
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;
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typeArgument
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: type
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| '?' (('extends' | 'super') type)?
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;
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qualifiedNameList
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: qualifiedName (',' qualifiedName)*
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;
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formalParameters
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: '(' formalParameterDecls? ')'
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;
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formalParameterDecls
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: variableModifiers type formalParameterDeclsRest
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;
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formalParameterDeclsRest
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: variableDeclaratorId (',' formalParameterDecls)?
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| '...' variableDeclaratorId
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;
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methodBody
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: block
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;
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constructorBody
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: '{' explicitConstructorInvocation? blockStatement* '}'
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;
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explicitConstructorInvocation
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: nonWildcardTypeArguments? ('this' | 'super') arguments ';'
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| expression '.' nonWildcardTypeArguments? 'super' arguments ';'
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;
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qualifiedName
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: Identifier ('.' Identifier)*
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;
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literal
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: integerLiteral
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| FloatingPointLiteral
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| CharacterLiteral
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| StringLiteral
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| booleanLiteral
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| 'null'
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;
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integerLiteral
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: HexLiteral
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| OctalLiteral
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| DecimalLiteral
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;
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booleanLiteral
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: 'true'
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| 'false'
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;
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// ANNOTATIONS
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annotations
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: annotation+
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;
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annotation
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: '@' annotationName ( '(' ( elementValuePairs | elementValue )? ')' )?
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;
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annotationName
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: Identifier ('.' Identifier)*
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;
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elementValuePairs
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: elementValuePair (',' elementValuePair)*
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;
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elementValuePair
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: Identifier '=' elementValue
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;
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elementValue
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: expression
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| annotation
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| elementValueArrayInitializer
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;
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elementValueArrayInitializer
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: '{' (elementValue (',' elementValue)*)? (',')? '}'
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;
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annotationTypeDeclaration
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: '@' 'interface' Identifier annotationTypeBody
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;
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annotationTypeBody
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: '{' (annotationTypeElementDeclaration)* '}'
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;
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annotationTypeElementDeclaration
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: modifiers annotationTypeElementRest
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;
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annotationTypeElementRest
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: type annotationMethodOrConstantRest ';'
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| normalClassDeclaration ';'?
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| normalInterfaceDeclaration ';'?
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| enumDeclaration ';'?
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| annotationTypeDeclaration ';'?
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;
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annotationMethodOrConstantRest
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: annotationMethodRest
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| annotationConstantRest
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;
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annotationMethodRest
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: Identifier '(' ')' defaultValue?
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;
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annotationConstantRest
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: variableDeclarators
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;
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defaultValue
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: 'default' elementValue
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;
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// STATEMENTS / BLOCKS
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block
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: '{' blockStatement* '}'
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;
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blockStatement
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: localVariableDeclarationStatement
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| classOrInterfaceDeclaration
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| statement
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;
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localVariableDeclarationStatement
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: localVariableDeclaration ';'
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;
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localVariableDeclaration
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: variableModifiers type variableDeclarators
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;
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variableModifiers
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: variableModifier*
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;
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statement
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: block
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| ASSERT expression (':' expression)? ';'
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| 'if' parExpression statement ('else' statement)?
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| 'for' '(' forControl ')' statement
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| 'while' parExpression statement
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| 'do' statement 'while' parExpression ';'
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| 'try' block
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( catches 'finally' block
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| catches
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| 'finally' block
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)
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| 'switch' parExpression '{' switchBlockStatementGroups '}'
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| 'synchronized' parExpression block
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| 'return' expression? ';'
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| 'throw' expression ';'
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| 'break' Identifier? ';'
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| 'continue' Identifier? ';'
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| ';'
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| statementExpression ';'
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| Identifier ':' statement
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;
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catches
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: catchClause (catchClause)*
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;
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catchClause
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: 'catch' '(' formalParameter ')' block
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;
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formalParameter
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: variableModifiers type variableDeclaratorId
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;
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switchBlockStatementGroups
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: (switchBlockStatementGroup)*
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;
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/* The change here (switchLabel -> switchLabel+) technically makes this grammar
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ambiguous; but with appropriately greedy parsing it yields the most
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appropriate AST, one in which each group, except possibly the last one, has
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labels and statements. */
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switchBlockStatementGroup
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: switchLabel+ blockStatement*
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;
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switchLabel
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: 'case' constantExpression ':'
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| 'case' enumConstantName ':'
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| 'default' ':'
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;
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forControl
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: enhancedForControl
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| forInit? ';' expression? ';' forUpdate?
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;
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forInit
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: localVariableDeclaration
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| expressionList
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;
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enhancedForControl
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: variableModifiers type Identifier ':' expression
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;
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forUpdate
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: expressionList
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;
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// EXPRESSIONS
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parExpression
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: '(' expression ')'
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;
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expressionList
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: expression (',' expression)*
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;
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statementExpression
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: expression
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;
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constantExpression
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: expression
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;
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expression
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: '(' expression ')'
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| 'this'
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| 'super'
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| integerLiteral
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| Identifier
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| type '.' 'class'
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| expression '.' Identifier
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| expression '.' 'this'
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| expression '.' 'super' '(' expressionList? ')'
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| expression '.' 'new' Identifier '(' expressionList? ')'
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| creator
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// | 'new' type ( '(' expressionList? ')' | ('[' expression ']')+)
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| expression '[' expression ']'
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| '(' type ')' expression
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| expression ('++' | '--')
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| expression '(' expressionList? ')'
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| ('+'|'-'|'++'|'--') expression
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| ('~'|'!') expression
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| expression ('*'|'/'|'%') expression
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| expression ('+'|'-') expression
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| expression ('<<' | '>>>' | '>>') expression
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| expression ('<=' | '>=' | '>' | '<') expression
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| expression 'instanceof' expression
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| expression ('==' | '=') expression
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| expression '&' expression
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| expression '^'<assoc=right> expression
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| expression '|' expression
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| expression '&&' expression
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| expression '||' expression
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| expression '?' expression ':' expression
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| expression
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('='<assoc=right>
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|'+='<assoc=right>
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|'-='<assoc=right>
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|'*='<assoc=right>
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|'/='<assoc=right>
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|'&='<assoc=right>
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|'|='<assoc=right>
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|'='<assoc=right>
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|'>' '>' '='<assoc=right>
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|'>' '>' '>' '='<assoc=right>
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|'<' '<' '='<assoc=right>
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|'%='<assoc=right>
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)
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expression
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;
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|
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creator
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: nonWildcardTypeArguments createdName classCreatorRest
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| createdName (arrayCreatorRest | classCreatorRest)
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;
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|
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createdName
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: classOrInterfaceType
|
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| primitiveType
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;
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|
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innerCreator
|
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: nonWildcardTypeArguments? Identifier classCreatorRest
|
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;
|
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|
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arrayCreatorRest
|
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: '['
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( ']' ('[' ']')* arrayInitializer
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| expression ']' ('[' expression ']')* ('[' ']')*
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)
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;
|
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|
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classCreatorRest
|
||||
: arguments classBody?
|
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;
|
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|
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nonWildcardTypeArguments
|
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: '<' typeList '>'
|
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;
|
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|
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arguments
|
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: '(' expressionList? ')'
|
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;
|
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