81 lines
1.5 KiB
Plaintext
81 lines
1.5 KiB
Plaintext
// This is a sample lexer generated by the ANTLR3 Maven Archetype
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// generator. It shows how to use a superclass to implement
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// support methods and variables you may use in the lexer actions
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// rather than create a messy lexer that has the Java code embedded
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// in it.
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//
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lexer grammar TLexer;
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options {
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language=Java; // Default
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// Tell ANTLR to make the generated lexer class extend the
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// the named class, which is where any supporting code and
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// variables will be placed.
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//
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superClass = AbstractTLexer;
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}
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// What package should the generated source exist in?
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//
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@header {
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package ${package};
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}
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// This is just a simple lexer that matches the usual suspects
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//
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KEYSER : 'Keyser' ;
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SOZE : 'Soze' ;
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ADD : '+' ;
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SEMI: ';' ;
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ID : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*
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;
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INT : '0'..'9'+
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;
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COMMENT
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: '//' ~('\n'|'\r')* '\r'? '\n' {skip();}
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| '/*' ( options {greedy=false;} : . )* '*/' {skip();}
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;
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WS : ( ' '
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| '\t'
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| '\r'
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| '\n'
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) {skip();}
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;
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STRING
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: '"' ( ESC_SEQ | ~('\\'|'"') )* '"'
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;
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fragment
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HEX_DIGIT : ('0'..'9'|'a'..'f'|'A'..'F') ;
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fragment
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ESC_SEQ
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: '\\' ('b'|'t'|'n'|'f'|'r'|'\"'|'\''|'\\')
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| UNICODE_ESC
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| OCTAL_ESC
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;
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fragment
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OCTAL_ESC
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: '\\' ('0'..'3') ('0'..'7') ('0'..'7')
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| '\\' ('0'..'7') ('0'..'7')
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| '\\' ('0'..'7')
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;
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fragment
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UNICODE_ESC
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: '\\' 'u' HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT
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;
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