Re: Bison Grammar Rules : Refering to non-terminals semantic value

[Thomas Lavergne]

Hans Aberg wrote:

>[Reply to Help-Bison.]
>At 18:02 +0100 2003/12/16, Thomas Lavergne wrote:
>
>
>>The basic problem is that I want to refer to the semantic value of a
>>non-terminal symbol from elsewhere than its own rule.
>>
>>
>
>You can't do that: You have to record the value in a global variable, which
>then can get accessed by other rules. Lookup tables and such fall into this
>category.
>
Thanks, I will use global variables and free them in a END :
{/*action*/} rule.

>>I read also about $0 and $-1 references, but it
>>does not seem to apply here, isn't it?
>>
>>
>
>Where did you read about this, i.e., in which version of Bison? Later
>versions are 1.75-1.875.
>
>
My version of Bison is 1.35, but I read this info in the Bison manual
(ps format) downloaded (yesterday) from the GNU bison site. This manual
is  for Bison 1.35
Cheers

Thomas