[antlr-interest] Quoted Name Value Pairs

[Jesse Anderson]

Gavin Lambert wrote:
> At 07:29 23/04/2008, Jesse Anderson wrote:
> >Here is my file:
>
> You've left some of the rules out, so it's hard to give a complete 
> answer.  But for starters:
>
> >WHITESPACE : WHITESPACECHAR+ ;
> >
> >WHITESPACECHAR : ( '\t' | ' ' | '\r' | '\n'| '\u000C' ) ;
>
> WHITESPACECHAR should be a fragment.
>
> >SEMICOLON : ( ';' )* ;
>
> This permits SEMICOLON to match nothing, and lexer rules that can 
> match nothing are a big no-no.  Either change the * to a + or remove 
> it entirely and match multiple SEMICOLON tokens in the parser.
>
> When you're starting out, it's useful to write a test harness for the 
> lexer alone; feed it some sample input and print out the tokens it 
> generates.  You'll often find that the parser isn't behaving the way 
> you expect because it's getting different tokens than you expect.  
> ANTLRworks currently doesn't really show this very well.
>
I tried that.  Still no joy.  I changed it to:

SEMICOLON : ( ';' )+;