42 lines
1000 B
ANTLR
42 lines
1000 B
ANTLR
lexer grammar QueryLexer;
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AND_OP : 'AND';
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OR_OP : 'OR';
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SIMPLE_OP : 'EQ' | 'NE' | 'GE' | 'GT' | 'LT' | 'LE';
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REP : 'REP';
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IN : 'IN';
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AS : 'AS';
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CBF : 'CBF';
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SELECT : 'SELECT';
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FROM : 'FROM';
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FILTER : 'FILTER';
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WILDCARD : '*';
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CLAUSE_SAME : 'SAME';
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CLAUSE_DISTINCT : 'DISTINCT';
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L_PAREN : '(';
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R_PAREN : ')';
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AT : '@';
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IDENT : Nondigit (Digit | Nondigit)* ;
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fragment Digit : [0-9] ;
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fragment Nondigit : [a-zA-Z_] ;
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NUMBER1 : [1-9] Digit* ;
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ZERO : '0' ;
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// Taken from antlr4 json grammar with minor corrections.
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// https://github.com/antlr/grammars-v4/blob/master/json/JSON.g4
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STRING : '"' (ESC | SAFECODEPOINTDOUBLE)* '"'
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| '\'' (ESC | SAFECODEPOINTSINGLE)* '\'' ;
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fragment ESC : '\\' (['"\\/bfnrt] | UNICODE) ;
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fragment UNICODE : 'u' HEX HEX HEX HEX ;
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fragment HEX : [0-9a-fA-F] ;
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fragment SAFECODEPOINTSINGLE : ~ ['\\\u0000-\u001F] ;
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fragment SAFECODEPOINTDOUBLE : ~ ["\\\u0000-\u001F] ;
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WS : [ \t\n\r] + -> skip ;
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