[antlr-interest] Trouble with comma separated list

[Jason]

Nevermind, I solved it myself.  Sorry to have wasted
your time.

-jason

--- Jason <jasonriz at yahoo.com> wrote:
> Hello,
> 
> I've written the following simple grammar to process
> a
> list of 'where's.
> 
> //BEGIN GRAMMAR
> class P extends Parser;
> 
> startRule
>   :
>   item_list;
> 
> item_list:
>   item  { System.out.println("item_list : item"); }
> (COMMA item)*  { System.out.println("item_list :
> (COMMA item)*"); }
>     ;
>   
> item : WHERE  { System.out.println("item : WHERE");
> }
> ;
> 
> class L extends Lexer;
> 
> tokens
> {
>   WHERE = "where";
>   COMMA = ",";
> }
> 
> NAME options { testLiterals=true; } : (',' |
> 'a'..'z'|'A'..'Z')+ {  } //NEWLINE
>   ;
> 
> // Whitespace -- ignored
> WS	:	(	' '
> 		|	'\t'
> 		|	'\f'
> 			// handle newlines
> 		|	(	options {generateAmbigWarnings=false;}
> 			:	"\r\n"  // Evil DOS
> 			|	'\r'    // Macintosh
> 			|	'\n'    // Unix (the right way)
> 			)
> 			{ newline(); }
> 		)+
> 		{ _ttype = Token.SKIP; }
> 	;
> //END GRAMMAR
> 
> This handles input of the following form:
> 
> 'where , where , where , where'
> 
> but chokes on something like:
> 
> 'where , where, where'
> 
> In other words it requires that there be a space
> between the 'where' token and the ',' token.  I
> understand why this is happening but it's not clear
> to
> me how to fix it.  If anyone can point me towards
> the
> relevent option (or some other solution), I'd
> greatly
> appreciate it.  Thanks.
> 
> -jason
> 
> 
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