Re: Is there a replacement for yychar

[Hans Aberg]

> On 12 Dec 2014, at 14:13, Matthias Simon <address@hidden> wrote:
> 
> On 2014-12-12 12:51, Hans Aberg wrote:
>>> if [ $($BISON --version | head 1 | ...) -lt 3 ]; then
>>>   write_header_config "#define yychar yyla.type”
>>> fi
>> 
>> Right. It might suffice to put it directly in the .yy file, as later
>> version do not seem to have yychar.
> Whereas later versions do not have yychar, older versions do not have 
> yyla.type. Putting the above macro into .yy file will fail in at least one 
> version.

So it seems.

> I tried to find a define which allows switches like this:
> 
> #ifndef YY_HAS_OWN_YYCHAR
> #define yychar yyla.type
> #endif
> 
> But it seems, there is no macro in bison which could be used as 
> YY_HAS_OWN_YYCHAR-trigger-thingy. Therefore I think I have to parse the bison 
> version string :/

When a new Bison version has been released, the older ones become deprecated. 
So it is best to stick with the latest version, and include the parser 
generated files in the distribution.