BNF for JavaCC.jj

/**********************************************
 * 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">
| <_CPPCODE: "CPPCODE">
| <_TOKEN: "TOKEN">
| <_SPECIAL_TOKEN: "SPECIAL_TOKEN">
| <_MORE: "MORE">
| <_SKIP: "SKIP">
| <_TOKEN_MGR_DECLS: "TOKEN_MGR_DECLS">
| <_EOF: "EOF">
| <_DCL_PARSER_BEGIN: "DCL_PARSER_BEGIN">
| <_DCL_PARSER_END: "DCL_PARSER_END">
| <_INC_PARSER_BEGIN: "INC_PARSER_BEGIN">
| <_INC_PARSER_END: "INC_PARSER_END">
| <_DEF_PARSER_BEGIN: "DEF_PARSER_BEGIN">
| <_DEF_PARSER_END: "DEF_PARSER_END">
}

   

/*
 * 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">
}

   

/* C++ RESERVED WORDS AND LITERALS */

<DEFAULT> TOKEN : {
<TEMPLATE: "template">
| <TYPENAME: "typename">
}

   

/* JAVA LITERALS */

<DEFAULT> TOKEN : {
<INTEGER_LITERAL: <DECIMAL_LITERAL> (["l","L"])? | <HEX_LITERAL> (["l","L"])? | <OCTAL_LITERAL> (["l","L"])? | <BINARY_LITERAL> (["l","L"])?>
| <#DECIMAL_LITERAL: ["1"-"9"] (("_")* ["0"-"9"])*>
| <#HEX_LITERAL: "0" ["x","X"] ["0"-"9","a"-"f","A"-"F"] (("_")* ["0"-"9","a"-"f","A"-"F"])*>
| <#OCTAL_LITERAL: "0" (("_")* ["0"-"7"])*>
| <#BINARY_LITERAL: "0" ["b","B"] ["0","1"] (("_")* ["0","1"])*>
| <FLOATING_POINT_LITERAL: <DECIMAL_FLOATING_POINT_LITERAL> | <HEXADECIMAL_FLOATING_POINT_LITERAL>>
| <#DECIMAL_FLOATING_POINT_LITERAL: ["0"-"9"] (("_")* ["0"-"9"])* "." (["0"-"9"] (("_")* ["0"-"9"])*)? (<DECIMAL_EXPONENT>)? (["f","F","d","D"])? | "." ["0"-"9"] (("_")* ["0"-"9"])* (<DECIMAL_EXPONENT>)? (["f","F","d","D"])? | ["0"-"9"] (("_")* ["0"-"9"])* <DECIMAL_EXPONENT> (["f","F","d","D"])? | ["0"-"9"] (("_")* ["0"-"9"])* (<DECIMAL_EXPONENT>)? ["f","F","d","D"]>
| <#DECIMAL_EXPONENT: ["e","E"] (["+","-"])? ["0"-"9"] (("_")* ["0"-"9"])*>
| <#HEXADECIMAL_FLOATING_POINT_LITERAL: "0" ["x","X"] ["0"-"9","a"-"f","A"-"F"] (("_")* ["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"])*)? "." ["0"-"9","a"-"f","A"-"F"] (("_")* ["0"-"9","a"-"f","A"-"F"])* <HEXADECIMAL_EXPONENT> (["f","F","d","D"])?>
| <#HEXADECIMAL_EXPONENT: ["p","P"] (["+","-"])? ["0"-"9"] (("_")* ["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: ":">
| <DOUBLECOLON: "::">
| <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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<DEFAULT> TOKEN : {
<ACT_TOK: ~[]>
}

   

/************************************************
 * THE JAVACC GRAMMAR SPECIFICATION STARTS HERE *
 ************************************************/

/**********************************************
 * 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.
 */

/*
 * Program structuring syntax follows.
 */

/*
 * 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.
 */

/*
 * Declaration syntax follows.
 */

/*
 * Type, name and expression syntax follows.
 */

/*
 * Expression syntax follows.
 */

// 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.

/*
 * The third LOOKAHEAD specification below is to parse to PrimarySuffix
 * if there is an expression between the "[...]".
 */

/*
 * Statement syntax follows.
 */

/* We use productions to match >>>, >> and > so that we can keep the
 * type declaration syntax with generics clean
 */

/* Annotation syntax follows. */

/* Annotation Types. */