1 lexer grammar t019lexer; 2 options { 3 language=Python; 4 filter=true; 5 } 6 7 IMPORT 8 : 'import' WS name=QIDStar WS? ';' 9 ; 10 11 /** Avoids having "return foo;" match as a field */ 12 RETURN 13 : 'return' (options {greedy=false;}:.)* ';' 14 ; 15 16 CLASS 17 : 'class' WS name=ID WS? ('extends' WS QID WS?)? 18 ('implements' WS QID WS? (',' WS? QID WS?)*)? '{' 19 ; 20 21 COMMENT 22 : '/*' (options {greedy=false;} : . )* '*/' 23 ; 24 25 STRING 26 : '"' (options {greedy=false;}: ESC | .)* '"' 27 ; 28 29 CHAR 30 : '\'' (options {greedy=false;}: ESC | .)* '\'' 31 ; 32 33 WS : (' '|'\t'|'\n')+ 34 ; 35 36 fragment 37 QID : ID ('.' ID)* 38 ; 39 40 /** QID cannot see beyond end of token so using QID '.*'? somewhere won't 41 * ever match since k=1 lookahead in the QID loop of '.' will make it loop. 42 * I made this rule to compensate. 43 */ 44 fragment 45 QIDStar 46 : ID ('.' ID)* '.*'? 47 ; 48 49 fragment 50 TYPE: QID '[]'? 51 ; 52 53 fragment 54 ARG : TYPE WS ID 55 ; 56 57 fragment 58 ID : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')* 59 ; 60 61 fragment 62 ESC : '\\' ('"'|'\''|'\\') 63 ; 64 65
