[antlr-interest] not parsing to end of input

[Tom Smith]

It looks like a suspect assignment.  Try:

print
 : 'print' NAME '(' v=ref ')' -> ^(PRINT NAME $v)
 | 'print' NAME -> ^(PRINT NAME)
 ;

ref
  : NAME
  | NUMBER
  ;

On Dec 10, 2007 4:08 PM, Mark Volkmann <r.mark.volkmann at gmail.com> wrote:
> Okay, here's a new, short grammar that illustrates the problem. Try
> feeding the following two lines into it using the ANTLRWorks debugger.
> You'll see that it stops before the semicolon on the first line and
> doesn't parse the rest.
>
> print f(x);
> print a;
>
> ---
>
> grammar problem;
>
> options {
>   output = AST;
> }
>
> tokens {
>   PRINT;
>   SCRIPT;
> }
>
> print
>   : 'print' NAME '(' v=(NUMBER | NAME) ')' -> ^(PRINT NAME $v)
>   | 'print' NAME -> ^(PRINT NAME)
>   ;
>
> script: (print TERMINATOR)* EOF -> ^(SCRIPT print*);
>
> NAME: 'a'..'z';
> NEWLINE: '\r'? '\n' { $channel = HIDDEN; };
> NUMBER: '0'..'9';
> TERMINATOR: ';';
> WHITESPACE: (' '|'\t')+ { $channel = HIDDEN; };
>
>
> On Dec 10, 2007 2:35 PM, Mark Volkmann <r.mark.volkmann at gmail.com> wrote:
> > On Dec 10, 2007 11:27 AM, Tom Smith <yotommy at gmail.com> wrote:
> > > When I ran this through the ANTLRworks debugger, it parsed all the
> > > input properly.
> > >
> > > When you invoked "Debug" are you selecting the 'script' rule as the start rule?
> >
> > No, I didn't. That was my problem for this small grammar. However,
> > there is still a problem with my larger grammar. I'll try again to
> > reduce it to something smaller that exhibits the problem and send it
> > out again. Thanks for looking at this!
> >
> >
> > > On Dec 10, 2007 12:08 PM, Mark Volkmann <r.mark.volkmann at gmail.com> wrote:
> > > > I've stripped down my grammar to the smallest size that reproduces the
> > > > problem. When I run "print x;" through this grammar using the
> > > > ANTLRWorks debugger, it doesn't process the semicolon. It stops
> > > > parsing at that point and throws the rest of the input away. In my
> > > > real grammar this ends up being multiple lines of lost input. Any idea
> > > > what I'm doing wrong?
> > > >
> > > > grammar problem;
> > > >
> > > > options {
> > > >   output = AST;
> > > > }
> > > >
> > > > script: print ';';
> > > > print: 'print' LETTER -> ^('print');
> > > >
> > > > LETTER: 'a'..'z';
> > > > WHITESPACE: ' '+ { $channel = HIDDEN; };
> >
> > --
> > R. Mark Volkmann
> > Object Computing, Inc.
> >
>
>
>
> --
> R. Mark Volkmann
> Object Computing, Inc.
>