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} TOKEN : { } NON-TERMINALS /************************************************ * THE JAVACC GRAMMAR SPECIFICATION STARTS HERE * ************************************************/ javacc_input := javacc_options "PARSER_BEGIN" "(" identifier ")" CompilationUnit "PARSER_END" "(" identifier ")" ( production )+ javacc_options := ( "{" ( option_binding )* "}" )? option_binding := ( | "LOOKAHEAD" | "IGNORE_CASE" | "static" | "PARSER_BEGIN" ) "=" ( IntegerLiteral | BooleanLiteral | StringLiteral | StringList ) ";" StringList := "(" StringLiteral ( "," StringLiteral )* ")" production := javacode_production | cppcode_production | regular_expr_production | token_manager_decls | bnf_production javacode_production := "JAVACODE" AccessModifier ResultType identifier FormalParameters ( "throws" Name ( "," Name )* )? Block cppcode_production := "CPPCODE" AccessModifier ResultType identifier FormalParameters ( "throws" Name ( "," Name )* )? Block bnf_production := AccessModifier ResultType identifier FormalParameters ( "throws" Name ( "," Name )* )? ":" Block "{" expansion_choices "}" AccessModifier := ( "public" | "protected" | "private" )? regular_expr_production := ( "<" "*" ">" | "<" ( "," )* ">" )? regexpr_kind ( "[" "IGNORE_CASE" "]" )? ":" "{" regexpr_spec ( "|" regexpr_spec )* "}" token_manager_decls := "TOKEN_MGR_DECLS" ":" ( ClassOrInterfaceBody )? regexpr_kind := "TOKEN" | "SPECIAL_TOKEN" | "SKIP" | "MORE" regexpr_spec := regular_expression ( Block )? ( ":" )? expansion_choices := expansion ( "|" expansion )* expansion := ( "LOOKAHEAD" "(" local_lookahead ")" )? ( expansion_unit )+ local_lookahead := ( IntegerLiteral )? ( "," )? ( expansion_choices )? ( "," )? ( "{" ( Expression )? "}" )? expansion_unit := "LOOKAHEAD" "(" local_lookahead ")" | Block | "[" expansion_choices "]" | "try" "{" expansion_choices "}" ( "catch" "(" ( Name )? ")" Block )* ( "finally" Block )? | ( PrimaryExpression "=" )? ( identifier ( TypeArguments )? Arguments | regular_expression ( "." )? ) | "(" expansion_choices ")" ( "+" | "*" | "?" )? regular_expression := StringLiteral | ( ( "#" )? identifier ":" )? complex_regular_expression_choices "> | "<" identifier ">" | "<" "EOF" ">" complex_regular_expression_choices := complex_regular_expression ( "|" complex_regular_expression )* complex_regular_expression := ( complex_regular_expression_unit )+ complex_regular_expression_unit := StringLiteral | "<" identifier ">" | character_list | "(" complex_regular_expression_choices ")" ( "+" | "*" | "?" | "{" IntegerLiteral ( "," ( IntegerLiteral )? )? "}" )? character_list := ( "~" )? "[" ( character_descriptor ( "," character_descriptor )* )? "]" character_descriptor := StringLiteral ( "-" StringLiteral )? identifier := /********************************************** * THE JAVA GRAMMAR SPECIFICATION STARTS HERE * **********************************************/ /* * The Java grammar is modified to use sequences of tokens * for the missing tokens - those that include "<<" and ">>". */ /* * The following production defines Java identifiers - it * includes the reserved words of JavaCC also. */ JavaIdentifier := ( | "LOOKAHEAD" | "IGNORE_CASE" | "PARSER_BEGIN" | "PARSER_END" | "JAVACODE" | "TOKEN" | "SPECIAL_TOKEN" | "MORE" | "SKIP" | "TOKEN_MGR_DECLS" | "EOF" | "template" | "DCL_PARSER_BEGIN" | "DCL_PARSER_END" | "INC_PARSER_BEGIN" | "INC_PARSER_END" | "DEF_PARSER_BEGIN" | "DEF_PARSER_END" ) /* * Program structuring syntax follows. */ CompilationUnit := ( PackageDeclaration )? ( ImportDeclaration )* ( TypeDeclaration )* PackageDeclaration := Modifiers "package" Name ";" ImportDeclaration := "import" ( "static" )? Name ( "." "*" )? ";" /* * Modifiers. We match all modifiers in a single rule to reduce the chances of * syntax errors for simple modifier mistakes. It will also enable us to give * better error messages. */ Modifiers := ( ( "public" | "static" | "protected" | "private" | "final" | "abstract" | "synchronized" | "native" | "transient" | "volatile" | "strictfp" | Annotation ) )* /* * Declaration syntax follows. */ TypeDeclaration := ";" | Modifiers ( ClassOrInterfaceDeclaration | EnumDeclaration | AnnotationTypeDeclaration ) ClassOrInterfaceDeclaration := ( "class" | "interface" ) JavaIdentifier ( TypeParameters )? ( ExtendsList )? ( ImplementsList )? ClassOrInterfaceBody ExtendsList := "extends" ClassOrInterfaceType ( "," ClassOrInterfaceType )* ImplementsList := "implements" ClassOrInterfaceType ( "," ClassOrInterfaceType )* EnumDeclaration := "enum" JavaIdentifier ( ImplementsList )? EnumBody EnumBody := "{" ( EnumConstant ( "," EnumConstant )* )? ( "," )? ( ";" ( ClassOrInterfaceBodyDeclaration )* )? "}" EnumConstant := Modifiers JavaIdentifier ( Arguments )? ( ClassOrInterfaceBody )? TypeParameters := "<" TypeParameter ( "," TypeParameter )* ">" TypeParameter := JavaIdentifier ( TypeBound )? TypeBound := "extends" ClassOrInterfaceType ( "&" ClassOrInterfaceType )* ClassOrInterfaceBody := "{" ( ClassOrInterfaceBodyDeclaration )* "}" ClassOrInterfaceBodyDeclaration := Initializer | Modifiers ( ClassOrInterfaceDeclaration | EnumDeclaration | ConstructorDeclaration | FieldDeclaration | MethodDeclaration ) | ";" FieldDeclaration := Type VariableDeclarator ( "," VariableDeclarator )* ";" VariableDeclarator := VariableDeclaratorId ( "=" VariableInitializer )? VariableDeclaratorId := JavaIdentifier ( "[" "]" )* VariableInitializer := ArrayInitializer | Expression ArrayInitializer := "{" ( VariableInitializer ( "," VariableInitializer )* )? ( "," )? "}" MethodDeclaration := ( TypeParameters )? ResultType MethodDeclarator ( "throws" NameList )? ( Block | ";" ) MethodDeclarator := JavaIdentifier FormalParameters ( "[" "]" )* FormalParameters := "(" ( FormalParameter ( "," FormalParameter )* )? ")" FormalParameter := Modifiers Type ( ( "&" | "*" ) | "..." )? VariableDeclaratorId ConstructorDeclaration := ( TypeParameters )? JavaIdentifier FormalParameters ( "throws" NameList )? "{" ( ExplicitConstructorInvocation )? ( BlockStatement )* "}" ExplicitConstructorInvocation := "this" Arguments ";" | ( PrimaryExpression "." )? "super" Arguments ";" Initializer := ( "static" )? Block /* * Type, name and expression syntax follows. */ Type := ReferenceType | PrimitiveType ReferenceType := PrimitiveType ( "[" "]" )+ | ( ( Template )? ClassOrInterfaceType ) ( "[" "]" )* Template := "template" "<" TemplateBase ( "," TemplateBase )* ">" TemplateBase := TemplatePack ( "..." )? TemplatePack := ( "class" | "typename" ) ClassOrInterfaceType := ( "::" )? ( TypeArguments )? ( ( "." | "::" ) ( TypeArguments )? )* TypeArguments := "<" ( TypeArgument ( "," TypeArgument ( "..." )? )* )? ">" TypeArgument := ReferenceType | "?" ( WildcardBounds )? WildcardBounds := "extends" ReferenceType | "super" ReferenceType PrimitiveType := "boolean" | "char" | "byte" | "short" | "int" | "long" | "float" | "double" ResultType := ( "void" ( "*" )? | ( "const" )? Type ( "*" | "&" )? ) Name := JavaIdentifier ( "." JavaIdentifier )* NameList := Name ( "," Name )* /* * Expression syntax follows. */ Expression := ConditionalExpression ( AssignmentOperator Expression )? AssignmentOperator := "=" | "*=" | "/=" | "%=" | "+=" | "-=" | "<<=" | ">>=" | ">>>=" | "&=" | "^=" | "|=" ConditionalExpression := ConditionalOrExpression ( "?" Expression ":" Expression )? ConditionalOrExpression := ConditionalAndExpression ( "||" ConditionalAndExpression )* ConditionalAndExpression := InclusiveOrExpression ( "&&" InclusiveOrExpression )* InclusiveOrExpression := ExclusiveOrExpression ( "|" ExclusiveOrExpression )* ExclusiveOrExpression := AndExpression ( "^" AndExpression )* AndExpression := EqualityExpression ( "&" EqualityExpression )* EqualityExpression := InstanceOfExpression ( ( "==" | "!=" ) InstanceOfExpression )* InstanceOfExpression := RelationalExpression ( "instanceof" Type )? RelationalExpression := ShiftExpression ( ( "<" | ">" | "<=" | ">=" ) ShiftExpression )* ShiftExpression := AdditiveExpression ( ( "<<" | RSIGNEDSHIFT | RUNSIGNEDSHIFT ) AdditiveExpression )* AdditiveExpression := MultiplicativeExpression ( ( "+" | "-" ) MultiplicativeExpression )* MultiplicativeExpression := UnaryExpression ( ( "*" | "/" | "%" ) UnaryExpression )* UnaryExpression := ( "+" | "-" ) UnaryExpression | PreIncrementExpression | PreDecrementExpression | UnaryExpressionNotPlusMinus PreIncrementExpression := "++" PrimaryExpression PreDecrementExpression := "--" PrimaryExpression UnaryExpressionNotPlusMinus := ( "~" | "!" ) UnaryExpression | CastExpression | PostfixExpression // This production is to determine lookahead only. The LOOKAHEAD specifications // below are not used, but they are there just to indicate that we know about // this. CastLookahead := "(" PrimitiveType | "(" Type "[" "]" | "(" Type ")" ( "~" | "!" | "(" | JavaIdentifier | "this" | "super" | "new" | Literal ) PostfixExpression := PrimaryExpression ( "++" | "--" )? CastExpression := "(" Type ")" UnaryExpression | "(" Type ")" UnaryExpressionNotPlusMinus PrimaryExpression := PrimaryPrefix ( PrimarySuffix )* MemberSelector := "." TypeArguments JavaIdentifier PrimaryPrefix := Literal | "this" | "super" "." JavaIdentifier | "(" Expression ")" | AllocationExpression | ResultType "." "class" | Name PrimarySuffix := "." "this" | "." AllocationExpression | MemberSelector | "[" Expression "]" | "." JavaIdentifier | Arguments Literal := | | | | BooleanLiteral | NullLiteral IntegerLiteral := BooleanLiteral := "true" | "false" StringLiteral := NullLiteral := "null" Arguments := "(" ( ArgumentList )? ")" ArgumentList := Expression ( "," Expression )* AllocationExpression := "new" PrimitiveType ArrayDimsAndInits | "new" ClassOrInterfaceType ( TypeArguments )? ( ArrayDimsAndInits | Arguments ( ClassOrInterfaceBody )? ) /* * The third LOOKAHEAD specification below is to parse to PrimarySuffix * if there is an expression between the "[...]". */ ArrayDimsAndInits := ( "[" Expression "]" )+ ( "[" "]" )* | ( "[" "]" )+ ArrayInitializer /* * Statement syntax follows. */ Statement := LabeledStatement | AssertStatement | Block | EmptyStatement | StatementExpression ";" | SwitchStatement | IfStatement | WhileStatement | DoStatement | ForStatement | BreakStatement | ContinueStatement | ReturnStatement | ThrowStatement | SynchronizedStatement | TryStatement AssertStatement := "assert" Expression ( ":" Expression )? ";" LabeledStatement := JavaIdentifier ":" Statement Block := "{" ( BlockStatement )* "}" BlockStatement := LocalVariableDeclaration ";" | Statement | ClassOrInterfaceDeclaration LocalVariableDeclaration := Modifiers Type VariableDeclarator ( "," VariableDeclarator )* EmptyStatement := ";" StatementExpression := PreIncrementExpression | PreDecrementExpression | PrimaryExpression ( "++" | "--" | AssignmentOperator Expression )? SwitchStatement := "switch" "(" Expression ")" "{" ( SwitchLabel ( BlockStatement )* )* "}" SwitchLabel := "case" Expression ":" | "default" ":" IfStatement := "if" "(" Expression ")" Statement ( "else" Statement )? WhileStatement := "while" "(" Expression ")" Statement DoStatement := "do" Statement "while" "(" Expression ")" ";" ForStatement := "for" "(" ( Modifiers Type JavaIdentifier ":" Expression | ( ForInit )? ";" ( Expression )? ";" ( ForUpdate )? ) ")" Statement ForInit := LocalVariableDeclaration | StatementExpressionList StatementExpressionList := StatementExpression ( "," StatementExpression )* ForUpdate := StatementExpressionList BreakStatement := "break" ( JavaIdentifier )? ";" ContinueStatement := "continue" ( JavaIdentifier )? ";" ReturnStatement := "return" ( Expression )? ";" ThrowStatement := "throw" Expression ";" SynchronizedStatement := "synchronized" "(" Expression ")" Block ResourceDeclaration := Type VariableDeclaratorId "=" Expression CatchParameter := Modifiers Type ( ( "&" | "*" ) | "..." )? ( "|" Type )* VariableDeclaratorId TryStatement := "try" ( "(" ResourceDeclaration ( ";" ResourceDeclaration )* ( ";" )? ")" )? Block ( "catch" "(" CatchParameter ")" Block )* ( "finally" Block )? /* We use productions to match >>>, >> and > so that we can keep the * type declaration syntax with generics clean */ RUNSIGNEDSHIFT := ( ">" ">" ">" ) RSIGNEDSHIFT := ( ">" ">" ) /* Annotation syntax follows. */ Annotation := NormalAnnotation | SingleMemberAnnotation | MarkerAnnotation NormalAnnotation := "@" Name "(" ( MemberValuePairs )? ")" MarkerAnnotation := "@" Name SingleMemberAnnotation := "@" Name "(" MemberValue ")" MemberValuePairs := MemberValuePair ( "," MemberValuePair )* MemberValuePair := JavaIdentifier "=" MemberValue MemberValue := Annotation | MemberValueArrayInitializer | ConditionalExpression MemberValueArrayInitializer := "{" MemberValue ( "," MemberValue )* ( "," )? "}" /* Annotation Types. */ AnnotationTypeDeclaration := "@" "interface" JavaIdentifier AnnotationTypeBody AnnotationTypeBody := "{" ( AnnotationTypeMemberDeclaration )* "}" AnnotationTypeMemberDeclaration := Modifiers ( Type JavaIdentifier "(" ")" ( DefaultValue )? ";" | ClassOrInterfaceDeclaration | EnumDeclaration | AnnotationTypeDeclaration | FieldDeclaration ) | ( ";" ) DefaultValue := "default" MemberValue DOCUMENT END