65 lines
1.0 KiB
Plaintext
65 lines
1.0 KiB
Plaintext
lexer grammar t019lexer;
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options {
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language=Python3;
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filter=true;
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}
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IMPORT
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: 'import' WS name=QIDStar WS? ';'
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;
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/** Avoids having "return foo;" match as a field */
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RETURN
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: 'return' (options {greedy=false;}:.)* ';'
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;
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CLASS
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: 'class' WS name=ID WS? ('extends' WS QID WS?)?
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('implements' WS QID WS? (',' WS? QID WS?)*)? '{'
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;
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COMMENT
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: '/*' (options {greedy=false;} : . )* '*/'
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;
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STRING
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: '"' (options {greedy=false;}: ESC | .)* '"'
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;
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CHAR
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: '\'' (options {greedy=false;}: ESC | .)* '\''
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;
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WS : (' '|'\t'|'\n')+
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;
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fragment
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QID : ID ('.' ID)*
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;
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/** QID cannot see beyond end of token so using QID '.*'? somewhere won't
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* ever match since k=1 lookahead in the QID loop of '.' will make it loop.
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* I made this rule to compensate.
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*/
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fragment
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QIDStar
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: ID ('.' ID)* '.*'?
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;
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fragment
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TYPE: QID '[]'?
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;
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fragment
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ARG : TYPE WS ID
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;
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fragment
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ID : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')*
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;
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fragment
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ESC : '\\' ('"'|'\''|'\\')
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;
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