[antlr-interest] ambiguity ?

Lloyd Dupont lloyd at galador.net
Thu Apr 18 00:33:08 PDT 2002


why these rules ares ambiguous (in a Lexer) ?
#-------------------
DIV_ASSIGN  : "/=" ;

SL_COMMENT :
    ( "//" | '#' )  
    (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
     ;
#-------------------
while these ones are not !
#-------------------
DIV_ASSIGN  : "/=" ;

SL_COMMENT_1 :
     "//"   (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
     ;

SL_COMMENT_2 : 
    '#' 
    (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
    ;

#-------------------

????


 

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