> On 7 Nov 2016, at 22:03, Simon Sobisch <simonsobi...@gnu.org> wrote:
>> It should not be too difficult, as it now uses M4. The only problem is > when the Bison skeleton file is updated, then you have an outdated > skeleton file. > > * Where do I find the correct skeleton file? Typically in /usr/local/share/bison/ or somewhere. > * How do I get familiar with m4 fast? It is fairly readable, so modify the relevant parts. I try to avoid macro programming :-), but check its manual, available at https://www.gnu.org/software/m4/manual/. > * How do I apply it (both via a manual call to bison in the makefile and > with the implicit yacc rule)? Just include it in the grammar file, have it in the sam directory; see the Bison manual. > >> But you may develop it as a feature, and then integrate it into Bison > yourself, or suggest it. The feature might be an option adding an extra > argument to yyerror with a reference to the error token. > > Sounds even much better. How to do this? If this isn't possible to be > applied "in-tree" (via m4 or otherwise - I guess it isn't) this would > only help people with a recent and unpublished Bison version (btw: are > there plans for a new release soon?) - or with the generated files. The developers seem not very active (cc'ed) right now. So try the above. _______________________________________________ help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
