Re: The problem with Mid-Rule Action

[Ramaswamy]

Hi,
    You mentioned that the grammar has lot many rules. The description given
is not sufficient. And what do you mean by $3 giving 2 values?? Further
explanation  on that would be great.

    Rgd Embedded rules they are fine if they do not generate shift/reduce or
such warnings (to check this if ur already getting s/r errors comment the
embedded action to see if it reduces), otherwise their behaviour might not
be as we expect (in the crude sense not when u want things that way and ur
sure of what u r doin). Bye.

Regds
Ram

----- Original Message -----
From: "praveen thakur" <address@hidden>
To: <address@hidden>
Sent: Friday, June 20, 2003 2:49 PM
Subject: The problem with Mid-Rule Action


> Hi,
>    I am giving the mid-rule action in my parser which
> is like this...
>
> Non-term1: TOKEN1 {// some code to create objects}
>             Non-term2 {//using the value of $3 and it
>                    gives correct value of Non-term2}
>            TOKEN2 {// Now when I use $3(for Non-term2)
>
>                     here, it's not
>                    giving the correct value...
>                   rather it gives the value of Non-
>                   term2 as well as of TOKEN2.. I want
>                    to access the value of
>                               Non-term2 here.}
>
> Non-term2: STRING {$$=$1;}
>
> < The Parser has lot many rules... I just wanted to be
> specific about the problem, that's why instead of real
> code I wrote like the above..>
>
> What is the reason behind this ?? How the value in
> "yyvsp" changes and used by $ values ??
> More specific, how can I get the desired result ??
>
>
> I am using Flex++2.3.8 -7 and Bison++ 1.21-8 from GNU.
>
>
> Thanking you all,
>
> praveen
>
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