Home > Documentation > JavaCC BNF
This page contains the complete syntax of the JavaCC grammar files with detailed explanations of each construct.
Contents
Tokens
The following is the JavaCC token specification.
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">
}
Whitespace
/*
* Whitespace
*/
<DEFAULT> SKIP : { " "
| "\t"
| "\n"
| "\r"
| "\f"
| "/*@egen*/" : AFTER_EGEN
}
<AFTER_EGEN> SKIP : {
<~[]> : DEFAULT
}
Comments
/*
* 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 : {
<~[]>
}
Reserved words and literals
/*
* 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
/*
* Separators
*/
<DEFAULT> TOKEN : { <LPAREN: "(">
| <RPAREN: ")">
| <LBRACE: "{">
| <RBRACE: "}">
| <LBRACKET: "[">
| <RBRACKET: "]">
| <SEMICOLON: ";">
| <COMMA: ",">
| <DOT: ".">
}
Operators
/*
* 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
/*
* Identifiers
*/
<DEFAULT> TOKEN : {
<IDENTIFIER: <LETTER> (<PART_LETTER>)*>
| <#LETTER: ["$","A"-"Z","_","a"-"z","\u00a2"-"\u00a5","\u00aa","\u00b5","\u00ba",
"\u00c0"-"\u00d6","\u00d8"-"\u00f6","\u00f8"-"\u021f","\u0222"-"\u0233","\u0250"-"\u02ad",
"\u02b0"-"\u02b8","\u02bb"-"\u02c1","\u02d0"-"\u02d1","\u02e0"-"\u02e4","\u02ee","\u037a",
"\u0386","\u0388"-"\u038a","\u038c","\u038e"-"\u03a1","\u03a3"-"\u03ce","\u03d0"-"\u03d7",
"\u03da"-"\u03f3","\u0400"-"\u0481","\u048c"-"\u04c4","\u04c7"-"\u04c8","\u04cb"-"\u04cc",
"\u04d0"-"\u04f5","\u04f8"-"\u04f9","\u0531"-"\u0556","\u0559","\u0561"-"\u0587",
"\u05d0"-"\u05ea","\u05f0"-"\u05f2","\u0621"-"\u063a","\u0640"-"\u064a","\u0671"-"\u06d3",
"\u06d5","\u06e5"-"\u06e6","\u06fa"-"\u06fc","\u0710","\u0712"-"\u072c","\u0780"-"\u07a5",
"\u0905"-"\u0939","\u093d","\u0950","\u0958"-"\u0961","\u0985"-"\u098c","\u098f"-"\u0990",
"\u0993"-"\u09a8","\u09aa"-"\u09b0","\u09b2","\u09b6"-"\u09b9","\u09dc"-"\u09dd",
"\u09df"-"\u09e1","\u09f0"-"\u09f3","\u0a05"-"\u0a0a","\u0a0f"-"\u0a10","\u0a13"-"\u0a28",
"\u0a2a"-"\u0a30","\u0a32"-"\u0a33","\u0a35"-"\u0a36","\u0a38"-"\u0a39","\u0a59"-"\u0a5c",
"\u0a5e","\u0a72"-"\u0a74","\u0a85"-"\u0a8b","\u0a8d","\u0a8f"-"\u0a91","\u0a93"-"\u0aa8",
"\u0aaa"-"\u0ab0","\u0ab2"-"\u0ab3","\u0ab5"-"\u0ab9","\u0abd","\u0ad0","\u0ae0",
"\u0b05"-"\u0b0c","\u0b0f"-"\u0b10","\u0b13"-"\u0b28","\u0b2a"-"\u0b30","\u0b32"-"\u0b33",
"\u0b36"-"\u0b39","\u0b3d","\u0b5c"-"\u0b5d","\u0b5f"-"\u0b61","\u0b85"-"\u0b8a",
"\u0b8e"-"\u0b90","\u0b92"-"\u0b95","\u0b99"-"\u0b9a","\u0b9c","\u0b9e"-"\u0b9f",
"\u0ba3"-"\u0ba4","\u0ba8"-"\u0baa","\u0bae"-"\u0bb5","\u0bb7"-"\u0bb9","\u0c05"-"\u0c0c",
"\u0c0e"-"\u0c10","\u0c12"-"\u0c28","\u0c2a"-"\u0c33","\u0c35"-"\u0c39","\u0c60"-"\u0c61",
"\u0c85"-"\u0c8c","\u0c8e"-"\u0c90","\u0c92"-"\u0ca8","\u0caa"-"\u0cb3","\u0cb5"-"\u0cb9",
"\u0cde","\u0ce0"-"\u0ce1","\u0d05"-"\u0d0c","\u0d0e"-"\u0d10","\u0d12"-"\u0d28",
"\u0d2a"-"\u0d39","\u0d60"-"\u0d61","\u0d85"-"\u0d96","\u0d9a"-"\u0db1","\u0db3"-"\u0dbb",
"\u0dbd","\u0dc0"-"\u0dc6","\u0e01"-"\u0e30","\u0e32"-"\u0e33","\u0e3f"-"\u0e46",
"\u0e81"-"\u0e82","\u0e84","\u0e87"-"\u0e88","\u0e8a","\u0e8d","\u0e94"-"\u0e97",
"\u0e99"-"\u0e9f","\u0ea1"-"\u0ea3","\u0ea5","\u0ea7","\u0eaa"-"\u0eab","\u0ead"-"\u0eb0",
"\u0eb2"-"\u0eb3","\u0ebd","\u0ec0"-"\u0ec4","\u0ec6","\u0edc"-"\u0edd","\u0f00",
"\u0f40"-"\u0f47","\u0f49"-"\u0f6a","\u0f88"-"\u0f8b","\u1000"-"\u1021","\u1023"-"\u1027",
"\u1029"-"\u102a","\u1050"-"\u1055","\u10a0"-"\u10c5","\u10d0"-"\u10f6","\u1100"-"\u1159",
"\u115f"-"\u11a2","\u11a8"-"\u11f9","\u1200"-"\u1206","\u1208"-"\u1246","\u1248",
"\u124a"-"\u124d","\u1250"-"\u1256","\u1258","\u125a"-"\u125d","\u1260"-"\u1286","\u1288",
"\u128a"-"\u128d","\u1290"-"\u12ae","\u12b0","\u12b2"-"\u12b5","\u12b8"-"\u12be","\u12c0",
"\u12c2"-"\u12c5","\u12c8"-"\u12ce","\u12d0"-"\u12d6","\u12d8"-"\u12ee","\u12f0"-"\u130e",
"\u1310","\u1312"-"\u1315","\u1318"-"\u131e","\u1320"-"\u1346","\u1348"-"\u135a",
"\u13a0"-"\u13f4","\u1401"-"\u166c","\u166f"-"\u1676","\u1681"-"\u169a","\u16a0"-"\u16ea",
"\u1780"-"\u17b3","\u17db","\u1820"-"\u1877","\u1880"-"\u18a8","\u1e00"-"\u1e9b",
"\u1ea0"-"\u1ef9","\u1f00"-"\u1f15","\u1f18"-"\u1f1d","\u1f20"-"\u1f45","\u1f48"-"\u1f4d",
"\u1f50"-"\u1f57","\u1f59","\u1f5b","\u1f5d","\u1f5f"-"\u1f7d","\u1f80"-"\u1fb4",
"\u1fb6"-"\u1fbc","\u1fbe","\u1fc2"-"\u1fc4","\u1fc6"-"\u1fcc","\u1fd0"-"\u1fd3",
"\u1fd6"-"\u1fdb","\u1fe0"-"\u1fec","\u1ff2"-"\u1ff4","\u1ff6"-"\u1ffc","\u203f"-"\u2040",
"\u207f","\u20a0"-"\u20af","\u2102","\u2107","\u210a"-"\u2113","\u2115","\u2119"-"\u211d",
"\u2124","\u2126","\u2128","\u212a"-"\u212d","\u212f"-"\u2131","\u2133"-"\u2139",
"\u2160"-"\u2183","\u3005"-"\u3007","\u3021"-"\u3029","\u3031"-"\u3035","\u3038"-"\u303a",
"\u3041"-"\u3094","\u309d"-"\u309e","\u30a1"-"\u30fe","\u3105"-"\u312c","\u3131"-"\u318e",
"\u31a0"-"\u31b7","\u3400"-"\u4db5","\u4e00"-"\u9fa5","\ua000"-"\ua48c","\uac00"-"\ud7a3",
"\uf900"-"\ufa2d","\ufb00"-"\ufb06","\ufb13"-"\ufb17","\ufb1d","\ufb1f"-"\ufb28",
"\ufb2a"-"\ufb36","\ufb38"-"\ufb3c","\ufb3e","\ufb40"-"\ufb41","\ufb43"-"\ufb44",
"\ufb46"-"\ufbb1","\ufbd3"-"\ufd3d","\ufd50"-"\ufd8f","\ufd92"-"\ufdc7","\ufdf0"-"\ufdfb",
"\ufe33"-"\ufe34","\ufe4d"-"\ufe4f","\ufe69","\ufe70"-"\ufe72","\ufe74","\ufe76"-"\ufefc",
"\uff04","\uff21"-"\uff3a","\uff3f","\uff41"-"\uff5a","\uff65"-"\uffbe","\uffc2"-"\uffc7",
"\uffca"-"\uffcf","\uffd2"-"\uffd7","\uffda"-"\uffdc","\uffe0"-"\uffe1","\uffe5"-"\uffe6"]>
| <#PART_LETTER: ["\u0000"-"\b","\u000e"-"\u001b","$","0"-"9","A"-"Z","_","a"-"z",
"\u007f"-"\u009f","\u00a2"-"\u00a5","\u00aa","\u00b5","\u00ba","\u00c0"-"\u00d6",
"\u00d8"-"\u00f6","\u00f8"-"\u021f","\u0222"-"\u0233","\u0250"-"\u02ad","\u02b0"-"\u02b8",
"\u02bb"-"\u02c1","\u02d0"-"\u02d1","\u02e0"-"\u02e4","\u02ee","\u0300"-"\u034e",
"\u0360"-"\u0362","\u037a","\u0386","\u0388"-"\u038a","\u038c","\u038e"-"\u03a1",
"\u03a3"-"\u03ce","\u03d0"-"\u03d7","\u03da"-"\u03f3","\u0400"-"\u0481","\u0483"-"\u0486",
"\u048c"-"\u04c4","\u04c7"-"\u04c8","\u04cb"-"\u04cc","\u04d0"-"\u04f5","\u04f8"-"\u04f9",
"\u0531"-"\u0556","\u0559","\u0561"-"\u0587","\u0591"-"\u05a1","\u05a3"-"\u05b9",
"\u05bb"-"\u05bd","\u05bf","\u05c1"-"\u05c2","\u05c4","\u05d0"-"\u05ea","\u05f0"-"\u05f2",
"\u0621"-"\u063a","\u0640"-"\u0655","\u0660"-"\u0669","\u0670"-"\u06d3","\u06d5"-"\u06dc",
"\u06df"-"\u06e8","\u06ea"-"\u06ed","\u06f0"-"\u06fc","\u070f"-"\u072c","\u0730"-"\u074a",
"\u0780"-"\u07b0","\u0901"-"\u0903","\u0905"-"\u0939","\u093c"-"\u094d","\u0950"-"\u0954",
"\u0958"-"\u0963","\u0966"-"\u096f","\u0981"-"\u0983","\u0985"-"\u098c","\u098f"-"\u0990",
"\u0993"-"\u09a8","\u09aa"-"\u09b0","\u09b2","\u09b6"-"\u09b9","\u09bc","\u09be"-"\u09c4",
"\u09c7"-"\u09c8","\u09cb"-"\u09cd","\u09d7","\u09dc"-"\u09dd","\u09df"-"\u09e3",
"\u09e6"-"\u09f3","\u0a02","\u0a05"-"\u0a0a","\u0a0f"-"\u0a10","\u0a13"-"\u0a28",
"\u0a2a"-"\u0a30","\u0a32"-"\u0a33","\u0a35"-"\u0a36","\u0a38"-"\u0a39","\u0a3c",
"\u0a3e"-"\u0a42","\u0a47"-"\u0a48","\u0a4b"-"\u0a4d","\u0a59"-"\u0a5c","\u0a5e",
"\u0a66"-"\u0a74","\u0a81"-"\u0a83","\u0a85"-"\u0a8b","\u0a8d","\u0a8f"-"\u0a91",
"\u0a93"-"\u0aa8","\u0aaa"-"\u0ab0","\u0ab2"-"\u0ab3","\u0ab5"-"\u0ab9","\u0abc"-"\u0ac5",
"\u0ac7"-"\u0ac9","\u0acb"-"\u0acd","\u0ad0","\u0ae0","\u0ae6"-"\u0aef","\u0b01"-"\u0b03",
"\u0b05"-"\u0b0c","\u0b0f"-"\u0b10","\u0b13"-"\u0b28","\u0b2a"-"\u0b30","\u0b32"-"\u0b33",
"\u0b36"-"\u0b39","\u0b3c"-"\u0b43","\u0b47"-"\u0b48","\u0b4b"-"\u0b4d","\u0b56"-"\u0b57",
"\u0b5c"-"\u0b5d","\u0b5f"-"\u0b61","\u0b66"-"\u0b6f","\u0b82"-"\u0b83","\u0b85"-"\u0b8a",
"\u0b8e"-"\u0b90","\u0b92"-"\u0b95","\u0b99"-"\u0b9a","\u0b9c","\u0b9e"-"\u0b9f",
"\u0ba3"-"\u0ba4","\u0ba8"-"\u0baa","\u0bae"-"\u0bb5","\u0bb7"-"\u0bb9","\u0bbe"-"\u0bc2",
"\u0bc6"-"\u0bc8","\u0bca"-"\u0bcd","\u0bd7","\u0be7"-"\u0bef","\u0c01"-"\u0c03",
"\u0c05"-"\u0c0c","\u0c0e"-"\u0c10","\u0c12"-"\u0c28","\u0c2a"-"\u0c33","\u0c35"-"\u0c39",
"\u0c3e"-"\u0c44","\u0c46"-"\u0c48","\u0c4a"-"\u0c4d","\u0c55"-"\u0c56","\u0c60"-"\u0c61",
"\u0c66"-"\u0c6f","\u0c82"-"\u0c83","\u0c85"-"\u0c8c","\u0c8e"-"\u0c90","\u0c92"-"\u0ca8",
"\u0caa"-"\u0cb3","\u0cb5"-"\u0cb9","\u0cbe"-"\u0cc4","\u0cc6"-"\u0cc8","\u0cca"-"\u0ccd",
"\u0cd5"-"\u0cd6","\u0cde","\u0ce0"-"\u0ce1","\u0ce6"-"\u0cef","\u0d02"-"\u0d03",
"\u0d05"-"\u0d0c","\u0d0e"-"\u0d10","\u0d12"-"\u0d28","\u0d2a"-"\u0d39","\u0d3e"-"\u0d43",
"\u0d46"-"\u0d48","\u0d4a"-"\u0d4d","\u0d57","\u0d60"-"\u0d61","\u0d66"-"\u0d6f",
"\u0d82"-"\u0d83","\u0d85"-"\u0d96","\u0d9a"-"\u0db1","\u0db3"-"\u0dbb","\u0dbd",
"\u0dc0"-"\u0dc6","\u0dca","\u0dcf"-"\u0dd4","\u0dd6","\u0dd8"-"\u0ddf","\u0df2"-"\u0df3",
"\u0e01"-"\u0e3a","\u0e3f"-"\u0e4e","\u0e50"-"\u0e59","\u0e81"-"\u0e82","\u0e84",
"\u0e87"-"\u0e88","\u0e8a","\u0e8d","\u0e94"-"\u0e97","\u0e99"-"\u0e9f","\u0ea1"-"\u0ea3",
"\u0ea5","\u0ea7","\u0eaa"-"\u0eab","\u0ead"-"\u0eb9","\u0ebb"-"\u0ebd","\u0ec0"-"\u0ec4",
"\u0ec6","\u0ec8"-"\u0ecd","\u0ed0"-"\u0ed9","\u0edc"-"\u0edd","\u0f00","\u0f18"-"\u0f19",
"\u0f20"-"\u0f29","\u0f35","\u0f37","\u0f39","\u0f3e"-"\u0f47","\u0f49"-"\u0f6a",
"\u0f71"-"\u0f84","\u0f86"-"\u0f8b","\u0f90"-"\u0f97","\u0f99"-"\u0fbc","\u0fc6",
"\u1000"-"\u1021","\u1023"-"\u1027","\u1029"-"\u102a","\u102c"-"\u1032","\u1036"-"\u1039",
"\u1040"-"\u1049","\u1050"-"\u1059","\u10a0"-"\u10c5","\u10d0"-"\u10f6","\u1100"-"\u1159",
"\u115f"-"\u11a2","\u11a8"-"\u11f9","\u1200"-"\u1206","\u1208"-"\u1246","\u1248",
"\u124a"-"\u124d","\u1250"-"\u1256","\u1258","\u125a"-"\u125d","\u1260"-"\u1286",
"\u1288","\u128a"-"\u128d","\u1290"-"\u12ae","\u12b0","\u12b2"-"\u12b5","\u12b8"-"\u12be",
"\u12c0","\u12c2"-"\u12c5","\u12c8"-"\u12ce","\u12d0"-"\u12d6","\u12d8"-"\u12ee",
"\u12f0"-"\u130e","\u1310","\u1312"-"\u1315","\u1318"-"\u131e","\u1320"-"\u1346",
"\u1348"-"\u135a","\u1369"-"\u1371","\u13a0"-"\u13f4","\u1401"-"\u166c","\u166f"-"\u1676",
"\u1681"-"\u169a","\u16a0"-"\u16ea","\u1780"-"\u17d3","\u17db","\u17e0"-"\u17e9",
"\u180b"-"\u180e","\u1810"-"\u1819","\u1820"-"\u1877","\u1880"-"\u18a9","\u1e00"-"\u1e9b",
"\u1ea0"-"\u1ef9","\u1f00"-"\u1f15","\u1f18"-"\u1f1d","\u1f20"-"\u1f45","\u1f48"-"\u1f4d",
"\u1f50"-"\u1f57","\u1f59","\u1f5b","\u1f5d","\u1f5f"-"\u1f7d","\u1f80"-"\u1fb4",
"\u1fb6"-"\u1fbc","\u1fbe","\u1fc2"-"\u1fc4","\u1fc6"-"\u1fcc","\u1fd0"-"\u1fd3",
"\u1fd6"-"\u1fdb","\u1fe0"-"\u1fec","\u1ff2"-"\u1ff4","\u1ff6"-"\u1ffc","\u200c"-"\u200f",
"\u202a"-"\u202e","\u203f"-"\u2040","\u206a"-"\u206f","\u207f","\u20a0"-"\u20af",
"\u20d0"-"\u20dc","\u20e1","\u2102","\u2107","\u210a"-"\u2113","\u2115","\u2119"-"\u211d",
"\u2124","\u2126","\u2128","\u212a"-"\u212d","\u212f"-"\u2131","\u2133"-"\u2139",
"\u2160"-"\u2183","\u3005"-"\u3007","\u3021"-"\u302f","\u3031"-"\u3035","\u3038"-"\u303a",
"\u3041"-"\u3094","\u3099"-"\u309a","\u309d"-"\u309e","\u30a1"-"\u30fe","\u3105"-"\u312c",
"\u3131"-"\u318e","\u31a0"-"\u31b7","\u3400"-"\u4db5","\u4e00"-"\u9fa5","\ua000"-"\ua48c",
"\uac00"-"\ud7a3","\uf900"-"\ufa2d","\ufb00"-"\ufb06","\ufb13"-"\ufb17","\ufb1d"-"\ufb28",
"\ufb2a"-"\ufb36","\ufb38"-"\ufb3c","\ufb3e","\ufb40"-"\ufb41","\ufb43"-"\ufb44",
"\ufb46"-"\ufbb1","\ufbd3"-"\ufd3d","\ufd50"-"\ufd8f","\ufd92"-"\ufdc7","\ufdf0"-"\ufdfb",
"\ufe20"-"\ufe23","\ufe33"-"\ufe34","\ufe4d"-"\ufe4f","\ufe69","\ufe70"-"\ufe72","\ufe74",
"\ufe76"-"\ufefc","\ufeff","\uff04","\uff10"-"\uff19","\uff21"-"\uff3a","\uff3f",
"\uff41"-"\uff5a","\uff65"-"\uffbe","\uffc2"-"\uffc7","\uffca"-"\uffcf","\uffd2"-"\uffd7",
"\uffda"-"\uffdc","\uffe0"-"\uffe1","\uffe5"-"\uffe6","\ufff9"-"\ufffb"]>
}
<DEFAULT> TOKEN : {
<ACT_TOK: ~[]>
}
Non-Terminals
JavaCC grammar
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" | "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 ::= ( "<" "*" ">"
| "<" <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 ( TypeArguments )? 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>
Java Grammar
The Java grammar is modified to use sequences of tokens for the missing tokens - those that include “«” and “»”.
Java identifiers
/*
* 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"
| "template"
| "DCL_PARSER_BEGIN"
| "DCL_PARSER_END"
| "INC_PARSER_BEGIN"
| "INC_PARSER_END"
| "DEF_PARSER_BEGIN"
| "DEF_PARSER_END"
)
Program structure
CompilationUnit ::= ( PackageDeclaration )?
( ImportDeclaration )*
( TypeDeclaration )*
PackageDeclaration ::= Modifiers "package" Name ";"
ImportDeclaration ::= "import"
( "static" )?
Name
( "." "*" )?
";"
Modifiers
/*
* 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
)
)*
Declarations
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
Types
Type ::= ReferenceType | PrimitiveType
ReferenceType ::= PrimitiveType ( "[" "]" )+
| ( ( Template )? ClassOrInterfaceType ) ( "[" "]" )*
Template ::= "template"
"<"
TemplateBase
( "," TemplateBase )*
">"
TemplateBase ::= TemplatePack ( "..." )? <IDENTIFIER>
TemplatePack ::= ( "class" | "typename" )
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" ( "*" )?
| ( "const" )? Type ( "*" | "&" )? )
Name ::= JavaIdentifier ( "." JavaIdentifier )*
NameList ::= Name ( "," Name )*
Expressions
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 ::= <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 )? )
/*
* This LOOKAHEAD specification is to parse to PrimarySuffix
* if there is an expression between the "[...]".
*/
ArrayDimsAndInits ::= ( "[" Expression "]" )+ ( "[" "]" )*
| ( "[" "]" )+ ArrayInitializer
Statements
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 ::= ( ">" ">" )
Annotations
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