DOCUMENT START
TOKENS
/**********************************************
* THE JAVACC TOKEN SPECIFICATION STARTS HERE *
**********************************************/
/* JAVACC RESERVED WORDS: These are the only tokens in JavaCC but not in Java */<DEFAULT> TOKEN : {
<_LOOKAHEAD: "LOOKAHEAD">
| <_IGNORE_CASE: "IGNORE_CASE">
| <_PARSER_BEGIN: "PARSER_BEGIN">
| <_PARSER_END: "PARSER_END">
| <_JAVACODE: "JAVACODE">
| <_TOKEN: "TOKEN">
| <_SPECIAL_TOKEN: "SPECIAL_TOKEN">
| <_MORE: "MORE">
| <_SKIP: "SKIP">
| <_TOKEN_MGR_DECLS: "TOKEN_MGR_DECLS">
| <_EOF: "EOF">
}
/*
* The remainder of the tokens are exactly (except for the removal of tokens
* containing ">>" and "<<") as in the Java grammar and must be diff equivalent
* (again with the exceptions above) to it.
*/
/* WHITE SPACE */<DEFAULT> SKIP : {
" "
| "\t"
| "\n"
| "\r"
| "\f"
| "/*@egen*/" : AFTER_EGEN
}
<AFTER_EGEN> SKIP : {
<~[]> : DEFAULT
}
/* COMMENTS */<DEFAULT> MORE : {
"//" : IN_SINGLE_LINE_COMMENT
| <"/**" ~["/"]> : IN_FORMAL_COMMENT
| "/*" : IN_MULTI_LINE_COMMENT
| "/*@bgen(jjtree" : IN_MULTI_LINE_COMMENT
}
<IN_SINGLE_LINE_COMMENT> SPECIAL : {
<SINGLE_LINE_COMMENT: "\n" | "\r" | "\r\n"> : DEFAULT
}
<IN_FORMAL_COMMENT> SPECIAL : {
<FORMAL_COMMENT: "*/"> : DEFAULT
}
<IN_MULTI_LINE_COMMENT> SPECIAL : {
<MULTI_LINE_COMMENT: "*/"> : DEFAULT
}
<IN_SINGLE_LINE_COMMENT,IN_FORMAL_COMMENT,IN_MULTI_LINE_COMMENT> MORE : {
<~[]>
}
/* JAVA RESERVED WORDS AND LITERALS */<DEFAULT> TOKEN : {
<ABSTRACT: "abstract">
| <ASSERT: "assert">
| <BOOLEAN: "boolean">
| <BREAK: "break">
| <BYTE: "byte">
| <CASE: "case">
| <CATCH: "catch">
| <CHAR: "char">
| <CLASS: "class">
| <CONST: "const">
| <CONTINUE: "continue">
| <_DEFAULT: "default">
| <DO: "do">
| <DOUBLE: "double">
| <ELSE: "else">
| <ENUM: "enum">
| <EXTENDS: "extends">
| <FALSE: "false">
| <FINAL: "final">
| <FINALLY: "finally">
| <FLOAT: "float">
| <FOR: "for">
| <GOTO: "goto">
| <IF: "if">
| <IMPLEMENTS: "implements">
| <IMPORT: "import">
| <INSTANCEOF: "instanceof">
| <INT: "int">
| <INTERFACE: "interface">
| <LONG: "long">
| <NATIVE: "native">
| <NEW: "new">
| <NULL: "null">
| <PACKAGE: "package">
| <PRIVATE: "private">
| <PROTECTED: "protected">
| <PUBLIC: "public">
| <RETURN: "return">
| <SHORT: "short">
| <STATIC: "static">
| <STRICTFP: "strictfp">
| <SUPER: "super">
| <SWITCH: "switch">
| <SYNCHRONIZED: "synchronized">
| <THIS: "this">
| <THROW: "throw">
| <THROWS: "throws">
| <TRANSIENT: "transient">
| <TRUE: "true">
| <TRY: "try">
| <VOID: "void">
| <VOLATILE: "volatile">
| <WHILE: "while">
}
/* JAVA LITERALS */<DEFAULT> TOKEN : {
<INTEGER_LITERAL: <DECIMAL_LITERAL> (["l","L"])? | <HEX_LITERAL> (["l","L"])? | <OCTAL_LITERAL> (["l","L"])?>
| <#DECIMAL_LITERAL: ["1"-"9"] (["0"-"9"])*>
| <#HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+>
| <#OCTAL_LITERAL: "0" (["0"-"7"])*>
| <FLOATING_POINT_LITERAL: <DECIMAL_FLOATING_POINT_LITERAL> | <HEXADECIMAL_FLOATING_POINT_LITERAL>>
| <#DECIMAL_FLOATING_POINT_LITERAL: (["0"-"9"])+ "." (["0"-"9"])* (<DECIMAL_EXPONENT>)? (["f","F","d","D"])? | "." (["0"-"9"])+ (<DECIMAL_EXPONENT>)? (["f","F","d","D"])? | (["0"-"9"])+ <DECIMAL_EXPONENT> (["f","F","d","D"])? | (["0"-"9"])+ (<DECIMAL_EXPONENT>)? ["f","F","d","D"]>
| <#DECIMAL_EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"])+>
| <#HEXADECIMAL_FLOATING_POINT_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+ (".")? <HEXADECIMAL_EXPONENT> (["f","F","d","D"])? | "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])* "." (["0"-"9","a"-"f","A"-"F"])+ <HEXADECIMAL_EXPONENT> (["f","F","d","D"])?>
| <#HEXADECIMAL_EXPONENT: ["p","P"] (["+","-"])? (["0"-"9"])+>
| <CHARACTER_LITERAL: "\'" (~["\'","\\","\n","\r"] | "\\" (["n","t","b","r","f","\\","\'","\""] | ["0"-"7"] (["0"-"7"])? | ["0"-"3"] ["0"-"7"] ["0"-"7"])) "\'">
| <STRING_LITERAL: "\"" (~["\"","\\","\n","\r"] | "\\" (["n","t","b","r","f","\\","\'","\""] | ["0"-"7"] (["0"-"7"])? | ["0"-"3"] ["0"-"7"] ["0"-"7"]))* "\"">
}
/* SEPARATORS */<DEFAULT> TOKEN : {
<LPAREN: "(">
| <RPAREN: ")">
| <LBRACE: "{">
| <RBRACE: "}">
| <LBRACKET: "[">
| <RBRACKET: "]">
| <SEMICOLON: ";">
| <COMMA: ",">
| <DOT: ".">
}
/* OPERATORS */<DEFAULT> TOKEN : {
<ASSIGN: "=">
| <LT: "<">
| <BANG: "!">
| <TILDE: "~">
| <HOOK: "?">
| <COLON: ":">
| <EQ: "==">
| <LE: "<=">
| <GE: ">=">
| <NE: "!=">
| <SC_OR: "||">
| <SC_AND: "&&">
| <INCR: "++">
| <DECR: "--">
| <PLUS: "+">
| <MINUS: "-">
| <STAR: "*">
| <SLASH: "/">
| <BIT_AND: "&">
| <BIT_OR: "|">
| <XOR: "^">
| <REM: "%">
| <PLUSASSIGN: "+=">
| <MINUSASSIGN: "-=">
| <STARASSIGN: "*=">
| <SLASHASSIGN: "/=">
| <ANDASSIGN: "&=">
| <ORASSIGN: "|=">
| <XORASSIGN: "^=">
| <REMASSIGN: "%=">
}
/* >'s need special attention due to generics syntax. */<DEFAULT> TOKEN : {
<RUNSIGNEDSHIFT: ">>>"> : {
| <RSIGNEDSHIFT: ">>"> : {
| <GT: ">">
}
/* IDENTIFIERS */<DEFAULT> TOKEN : {
<IDENTIFIER: <LETTER> (<PART_LETTER>)*>
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| <#PART_LETTER: 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}
NON-TERMINALS
/************************************************
* THE JAVACC GRAMMAR SPECIFICATION STARTS HERE *
************************************************/ javacc_input := javacc_options "PARSER_BEGIN" "(" identifier ")" CompilationUnit "PARSER_END" "(" identifier ")" ( production )+ <EOF>
javacc_options := ( <IDENTIFIER> "{" ( option_binding )* "}" )?
option_binding := ( <IDENTIFIER> | "LOOKAHEAD" | "IGNORE_CASE" | "static" ) "=" ( IntegerLiteral | BooleanLiteral | StringLiteral ) ";"
production := javacode_production
| regular_expr_production
| token_manager_decls
| bnf_production
javacode_production := "JAVACODE" 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 := ( "<" "*" ">" | "<" <IDENTIFIER> ( "," <IDENTIFIER> )* ">" )? 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 )? ( ":" <IDENTIFIER> )?
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 <IDENTIFIER> ")" Block )* ( "finally" Block )?
| ( PrimaryExpression "=" )? ( identifier Arguments | regular_expression ( "." <IDENTIFIER> )? )
| "(" expansion_choices ")" ( "+" | "*" | "?" )?
regular_expression := StringLiteral
| <LANGLE: "<"> ( ( "#" )? identifier ":" )? complex_regular_expression_choices <RANGLE: ">">
| "<" 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 := <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 := ( <IDENTIFIER> | "LOOKAHEAD" | "IGNORE_CASE" | "PARSER_BEGIN" | "PARSER_END" | "JAVACODE" | "TOKEN" | "SPECIAL_TOKEN" | "MORE" | "SKIP" | "TOKEN_MGR_DECLS" | "EOF" )
/*
* 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" ) <IDENTIFIER> ( TypeParameters )? ( ExtendsList )? ( ImplementsList )? ClassOrInterfaceBody
ExtendsList := "extends" ClassOrInterfaceType ( "," ClassOrInterfaceType )*
ImplementsList := "implements" ClassOrInterfaceType ( "," ClassOrInterfaceType )*
EnumDeclaration := "enum" <IDENTIFIER> ( ImplementsList )? EnumBody
EnumBody := "{" ( EnumConstant ( "," EnumConstant )* )? ( "," )? ( ";" ( ClassOrInterfaceBodyDeclaration )* )? "}"
EnumConstant := Modifiers <IDENTIFIER> ( Arguments )? ( ClassOrInterfaceBody )?
TypeParameters := "<" TypeParameter ( "," TypeParameter )* ">"
TypeParameter := <IDENTIFIER> ( TypeBound )?
TypeBound := "extends" ClassOrInterfaceType ( "&" ClassOrInterfaceType )*
ClassOrInterfaceBody := "{" ( ClassOrInterfaceBodyDeclaration )* "}"
ClassOrInterfaceBodyDeclaration := Initializer
| Modifiers ( ClassOrInterfaceDeclaration | EnumDeclaration | ConstructorDeclaration | FieldDeclaration | MethodDeclaration )
| ";"
FieldDeclaration := Type VariableDeclarator ( "," VariableDeclarator )* ";"
VariableDeclarator := VariableDeclaratorId ( "=" VariableInitializer )?
VariableDeclaratorId := <IDENTIFIER> ( "[" "]" )*
VariableInitializer := ArrayInitializer
| Expression
ArrayInitializer := "{" ( VariableInitializer ( "," VariableInitializer )* )? ( "," )? "}"
MethodDeclaration := ( TypeParameters )? ResultType MethodDeclarator ( "throws" NameList )? ( Block | ";" )
MethodDeclarator := <IDENTIFIER> FormalParameters ( "[" "]" )*
FormalParameters := "(" ( FormalParameter ( "," FormalParameter )* )? ")"
FormalParameter := Modifiers Type ( "..." )? VariableDeclaratorId
ConstructorDeclaration := ( TypeParameters )? <IDENTIFIER> 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 ( "[" "]" )+
| ( ClassOrInterfaceType ) ( "[" "]" )*
ClassOrInterfaceType := <IDENTIFIER> ( TypeArguments )? ( "." <IDENTIFIER> ( TypeArguments )? )*
TypeArguments := "<" TypeArgument ( "," TypeArgument )* ">"
TypeArgument := ReferenceType
| "?" ( WildcardBounds )?
WildcardBounds := "extends" ReferenceType
| "super" ReferenceType
PrimitiveType := "boolean"
| "char"
| "byte"
| "short"
| "int"
| "long"
| "float"
| "double"
ResultType := ( "void" | 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 ")" ( "~" | "!" | "(" | <IDENTIFIER> | "this" | "super" | "new" | Literal )
PostfixExpression := PrimaryExpression ( "++" | "--" )?
CastExpression := "(" Type ")" UnaryExpression
| "(" Type ")" UnaryExpressionNotPlusMinus
PrimaryExpression := PrimaryPrefix ( PrimarySuffix )*
MemberSelector := "." TypeArguments <IDENTIFIER>
PrimaryPrefix := Literal
| "this"
| "super" "." <IDENTIFIER>
| "(" Expression ")"
| AllocationExpression
| ResultType "." "class"
| Name
PrimarySuffix := "." "this"
| "." AllocationExpression
| MemberSelector
| "[" Expression "]"
| "." <IDENTIFIER>
| Arguments
Literal := <INTEGER_LITERAL>
| <FLOATING_POINT_LITERAL>
| <CHARACTER_LITERAL>
| <STRING_LITERAL>
| BooleanLiteral
| NullLiteral
IntegerLiteral := <INTEGER_LITERAL>
BooleanLiteral := "true"
| "false"
StringLiteral := <STRING_LITERAL>
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 := <IDENTIFIER> ":" 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 <IDENTIFIER> ":" Expression | ( ForInit )? ";" ( Expression )? ";" ( ForUpdate )? ) ")" Statement
ForInit := LocalVariableDeclaration
| StatementExpressionList
StatementExpressionList := StatementExpression ( "," StatementExpression )*
ForUpdate := StatementExpressionList
BreakStatement := "break" ( <IDENTIFIER> )? ";"
ContinueStatement := "continue" ( <IDENTIFIER> )? ";"
ReturnStatement := "return" ( Expression )? ";"
ThrowStatement := "throw" Expression ";"
SynchronizedStatement := "synchronized" "(" Expression ")" Block
TryStatement := "try" Block ( "catch" "(" FormalParameter ")" 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 := <IDENTIFIER> "=" MemberValue
MemberValue := Annotation
| MemberValueArrayInitializer
| ConditionalExpression
MemberValueArrayInitializer := "{" MemberValue ( "," MemberValue )* ( "," )? "}"
/* Annotation Types. */ AnnotationTypeDeclaration := "@" "interface" <IDENTIFIER> AnnotationTypeBody
AnnotationTypeBody := "{" ( AnnotationTypeMemberDeclaration )* "}"
AnnotationTypeMemberDeclaration := Modifiers ( Type <IDENTIFIER> "(" ")" ( DefaultValue )? ";" | ClassOrInterfaceDeclaration | EnumDeclaration | AnnotationTypeDeclaration | FieldDeclaration )
| ( ";" )
DefaultValue := "default" MemberValue
DOCUMENT END
