[antlr-interest] Parsing comments
Soren Holstebroe
holstebroe at gmail.com
Thu Sep 17 09:59:50 PDT 2009
Thank you for your answer,
As i understand it, your suggestion considers the whole template line as a
single token, but I don't want the template token to eat up the rest of the
line, since this is where my template wrapping grammar would be.
My grammar will have rules like this:
wrap_option
: WRAP_OPTION_BEGIN
( 'WRAP'
| 'TEMPLATE' '<' type_specifier (',' type_specifier)* '>'
)
;
so I need something to match '//' WS* '@' as my WRAP_OPTION_BEGIN.
Soren
2009/9/17 Indhu Bharathi <indhu.b at s7software.com>
> Try using semantic predicates to look-ahead and decide whether to emit
> SLCOMMENT or TEMPLATE
>
>
>
> Something like:
>
>
>
> fragment SLCOMMENT
>
> : ;
>
>
>
> fragment TEMPLATE
>
> : ;
>
>
>
> SLCOMMENT_OR_TEMPLATE
>
> : '//' (
>
> { input.LA(1)=='@' }?=> (
> options {greedy=false;} : . )* EOL { $type=TEMPLATE; }
>
> | ( options {greedy=false;} :
> . )* EOL { $type=SLCOMMENT; }
>
> )
>
> ;
>
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