<DECIMAL_INTEGER>: 0 | [1-9] [0-9]*    ;

<HEX_INTEGER>: 0[xX][0-9a-fA-F]+        ;

<OCTAL_INTEGER>: 0[0-7]+        ;

<EXPONENT>: [eE] [\-\+]? [0-9]+         ;

<FLOAT_TYPE>: [fFdD]    ;

<ESCAPE_SEQUENCE>: \\ ([btnfr\"\'\\] | ([0-3] [0-7]{0,2} | [4-7][0-7]?))       ;

<INTEGER_LITERAL>: (<DECIMAL_INTEGER> | <HEX_INTEGER> | <OCTAL_INTEGER>) [lL]?  ;

<FLOATING_POINT_LITERAL>: [0-9]+ \. [0-9]* <EXPONENT>? <FLOAT_TYPE>? | \. [0-9]+ <EXPONENT>? <FLOAT_TYPE>? | [0-9]+ <EXPONENT> <FLOAT_TYPE>? | [0-9]+ <FLOAT_TYPE>      ;

<BOOLEAN_LITERAL>: true | false ;

<CHARACTER_LITERAL>: \' ([^\\\'] | <ESCAPE_SEQUENCE> ) \'       ;

<STRING_LITERAL>: \" ([^\\\"] | <ESCAPE_SEQUENCE> )* \"      ;

<NULL_LITERAL>: null    ;

<IDENTIFIER>: [a-zA-Z_] \w*     ;

<GT>: \> ;

<LT>: \< ;

<eol>: \r | \n | \r\n   ;

<whitespace>: \s+       ;

<JAVADOC>: \/\*\*;

<comment>: \/\/ [^\r\n]* <eol>  ;

<comment2>: \/\* ;