On 10/10/2010 06:31 PM, A Z wrote:
> Hello,
>
> I have a lexer with the following rules:
>
>
> LBMINUSGT : '[->';
> LBASRB : '[*]';
> LBAST : '[*';
> LBEQUALS : '[=';
> LBPLUSRB : '[+]';
> LBRACE : '{';
> LBRACKET : '[';
> MINUS : '-';
>
> The lexer fails(with an error message) when any string of '[-' or '[*' is
> detected. I'm confused why ANTLR cannot tokenize '[-' correctly as LBRACKET
> MINUS. It also discards two characters after the failed token. I do not have
> a static k defined and ANTLR generates no warnings when compiling. I'm still
> debugging but it's slow figuring out how the antlr3dfapredict() function
> works. Any help is appreciated.
Does the following help you out?
fragment
LBMINUSGT: // "[->"
;
fragment
LBASRB: // "[*]"
;
fragment
LBAST: // "[*"
;
fragment
LBEQUALS: // "[="
;
fragment
LBPLUSRB: // "[+]"
;
LBRACKET: '[' ( ('-' '>')=> '-' '>' { $token = LBMINUSGT; }
| ('*' ( ']' { $token = LBASRB; }
| { $token = LBAST; } )
| ('+' ']')=> '+' ']' { $token = LBPLUSRB; }
| '=' { token = LBEQUALS; }
| )
;
--
Kevin J. Cummings
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