41 lines
916 B
ANTLR
41 lines
916 B
ANTLR
lexer grammar HooLexer;
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IDENTIFIER: Letter LetterOrDigit*;
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fragment DIGIT: [0-9];
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DECIMAL_LITERAL: '0' | ('+' | '-')? [1-9] [0-9]*;
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FLOAT_LITERAL: ('+' | '-')? Digits+ '.' Digits+ (
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[eE] [+-]? Digits+
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)?;
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BOOL_LITERAL: 'true' | 'false';
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CHAR_LITERAL: '\'' (~['\\\r\n] | EscapeSequence) '\'';
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STRING_LITERAL: '"' (~["\\\r\n] | EscapeSequence)* '"';
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TEXT_BLOCK: '"""' [ \t]* [\r\n] (. | EscapeSequence)*? '"""';
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NULL_LITERAL: 'null';
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WS: [ \t\r\n\u000C]+ -> channel(HIDDEN);
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COMMENT: '/*' .*? '*/' -> channel(HIDDEN);
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LINE_COMMENT: '//' ~[\r\n]* -> channel(HIDDEN);
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fragment EscapeSequence:
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'\\' 'u005c'? [btnfr"'\\]
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| '\\' 'u005c'? ([0-3]? [0-7])? [0-7]
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| '\\' 'u'+ HexDigit HexDigit HexDigit HexDigit;
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fragment HexDigit: [0-9a-fA-F];
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fragment Digits: [0-9];
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fragment LetterOrDigit: Letter | [0-9];
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fragment Letter:
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[a-zA-Z$_]
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| ~[\u0000-\u007F\uD800-\uDBFF]
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| [\uD800-\uDBFF] [\uDC00-\uDFFF]; |