Re: graph: prefer *.gv to *.dot (was: bison info doc - precedence in recursive parsing)

[Hans Åberg]

> On 19 Feb 2019, at 19:35, Akim Demaille <address@hidden> wrote:
> 
>> Le 17 févr. 2019 à 16:19, Akim Demaille <address@hidden> a écrit :
>> 
>>> Le 10 févr. 2019 à 15:20, Hans Åberg <address@hidden> a écrit :
>>> 
>>>> On 10 Feb 2019, at 11:07, Akim Demaille <address@hidden> wrote:
>>>> 
>>>> [*.dot vs. *.gv]
>>>> But it's too late to change the default behavior.
>>> 
>>> You might change it, as it is not usable on real life grammars.
>> 
>> You have a point :)
>> 
>> But it does not mean it will not break something for someone.
>> Maybe bound to %require "3.4", why not.
> 
> Here is my proposal.  Maybe at some point we should change the default for 
> grammars without %require from *.dot to *.gv.  Versions with a %require 
> before 3.4 would still produce *.dot.
> 
> +** Changes
> +
> +  In conformance with the recommendations of the GraphViz team, if %require
> +  "3.4" (or better) is specified, the option --graph generates a *.gv file
> +  by default, instead of *.dot.

If %require is not present in 3.4, then you might generate a .gv file: It would 
be like the hidden g++ hidden -std that changes with version, so there is a 
precedent.