[antlr-interest] wildcard string in grammar
Gavin Lambert
antlr at mirality.co.nz
Wed Jul 22 12:58:15 PDT 2009
At 03:06 23/07/2009, Tim Williams wrote:
>WILD_STRING: (('a'..'z'|'A'..'Z')* ('*'|'?')
>('a'..'z'|'A'..'Z')*)+
>
>This generates the warning "Decision can match input
>('a'..'z'|'A'..'Z') using multiple alternatives 1,2 disabling
>alternative(s) 2."
WILD_STRING
: ('a'..'z'|'A'..'Z')*
(
('*'|'?')
('a'..'z'|'A'..'Z')*
)+
;
This might end up being ambiguous with an ID-style rule, though,
since the lexer doesn't always look far enough ahead to deal with
distinguishing characters after loops.
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