Re: Help with shift/reduce conflict

2005-03-29 Thread Hans Aberg 
As Henrik Sorensen points out, you need to be more specific about the 
grammar you want to produce. Here is a suggestion though:

%token YYID
%%
expression:
hier_id
  | method_call
  | paren_expr
;
paren_expr:
   '(' expression ')'
;
method_call:
paren_expr '.' YYID paren_expr
;
hier_id :
YYID
  | hier_id '.' YYID
;
At 12:23 +0200 2005/03/28, Henrik Sorensen wrote:
On Monday 28 March 2005 00.20, Soumitra Kumar wrote:
 1+3.YYID(7) has no meaning. But following is a valid
 expression:
 (YYID + YYID).YYID().YYID () + YYID() + YYID.YYID() +
 YYID.YYID
for this reduction to make any sense, you need to show more of your grammar.
What kind of operator is '.' in your grammar ?
Henrik
 -Soumitra.
 --- Henrik Sorensen <[EMAIL PROTECTED]> wrote:
 > can you tell a bit more about what your grammar
 > tries to achieve ?
 > from your very brief description, it sounds like you
 > can do this:
 >   1+3.YYID(7)
 > but what would this mean ?
 > Henrik
 >
 > On Sunday 27 March 2005 21.37, Soumitra Kumar wrote:
 > > %token YYID
 > > %%
 > > expression : hier_id
 > >
 > > | method_call
 > >
 > >   /* unary and secondary expression
 >
 > follows.
 >
 > > */
 > > ;
 > > method_call : expression '.' YYID '(' expression
 >
 > ')'
 >
 > > ;
 > > hier_id : YYID
 > >
 > > | hier_id '.' YYID
 > >
 > > ;
 > >
 > > How to resolve the shift/reduce conflict? Please
 >
 > help.
 >
 > > -Soumitra.
 > >
 > >
 > >
 > > __
 > > Do you Yahoo!?
 > > Yahoo! Small Business - Try our new resources
 >
 > site!
 >
 > > http://smallbusiness.yahoo.com/resources/
 > >
 > >
 > > ___
 > > Help-bison@gnu.org
 >
 > http://lists.gnu.org/mailman/listinfo/help-bison
 __
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 http://smallbusiness.yahoo.com/resources/
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Re: Help with shift/reduce conflict

2005-03-29 Thread Soumitra Kumar 
Thanks. That's what I end up doing.

--- Hans Aberg <[EMAIL PROTECTED]> wrote:
> As Henrik Sorensen points out, you need to be more
> specific about the 
> grammar you want to produce. Here is a suggestion
> though:
> 
> %token YYID
> %%
> expression:
>  hier_id
>| method_call
>| paren_expr
> ;
> paren_expr:
> '(' expression ')'
> ;
> method_call:
>  paren_expr '.' YYID paren_expr
> ;
> hier_id :
>  YYID
>| hier_id '.' YYID
> ;
> 
> 
> At 12:23 +0200 2005/03/28, Henrik Sorensen wrote:
> >On Monday 28 March 2005 00.20, Soumitra Kumar
> wrote:
> >>  1+3.YYID(7) has no meaning. But following is a
> valid
> >>  expression:
> >>  (YYID + YYID).YYID().YYID () + YYID() +
> YYID.YYID() +
> >>  YYID.YYID
> >for this reduction to make any sense, you need to
> show more of your grammar.
> >What kind of operator is '.' in your grammar ?
> >
> >Henrik
> >
> >>
> >>  -Soumitra.
> >>
> >>  --- Henrik Sorensen <[EMAIL PROTECTED]>
> wrote:
> >>  > can you tell a bit more about what your
> grammar
> >>  > tries to achieve ?
> >>  > from your very brief description, it sounds
> like you
> >>  > can do this:
> >>  > 1+3.YYID(7)
> >>  > but what would this mean ?
> >>  > Henrik
> >>  >
> >>  > On Sunday 27 March 2005 21.37, Soumitra Kumar
> wrote:
> >>  > > %token YYID
> >>  > > %%
> >>  > > expression : hier_id
> >>  > >
> >>  > > | method_call
> >>  > >
> >>  > >   /* unary and secondary expression
> >>  >
> >>  > follows.
> >>  >
> >>  > > */
> >>  > > ;
> >>  > > method_call : expression '.' YYID '('
> expression
> >>  >
> >>  > ')'
> >>  >
> >>  > > ;
> >>  > > hier_id : YYID
> >>  > >
> >>  > > | hier_id '.' YYID
> >>  > >
> >>  > > ;
> >>  > >
> >>  > > How to resolve the shift/reduce conflict?
> Please
> >>  >
> >>  > help.
> >>  >
> >>  > > -Soumitra.
> >>  > >
> >>  > >
> >>  > >
> >>  > > __
> >>  > > Do you Yahoo!?
> >>  > > Yahoo! Small Business - Try our new
> resources
> >>  >
> >>  > site!
> >>  >
> >>  > > http://smallbusiness.yahoo.com/resources/
> >>  > >
> >>  > >
> >>  > >
> ___
> >>  > > Help-bison@gnu.org
> >>  >
> >>  >
> http://lists.gnu.org/mailman/listinfo/help-bison
> >>
> >>  __
> >>  Do you Yahoo!?
> >>  Yahoo! Small Business - Try our new resources
> site!
> >>  http://smallbusiness.yahoo.com/resources/
> >>
> >>
> >>  ___
> >>  Help-bison@gnu.org
> http://lists.gnu.org/mailman/listinfo/help-bison
> >
> >
> >___
> >Help-bison@gnu.org
> http://lists.gnu.org/mailman/listinfo/help-bison
> 
> 
> 



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