code review 5532045: goyacc: fix the panic during error recovery if $$Debug ...

goyacc: fix the panic during error recovery if $$Debug >= 2 and the generated code could not convert the token name correctly. Add the output of the rule listing in y.output to use with Russ's bisonerrors.

[renyi, 2012-01-08 00:49:08]

Hello golang-dev@googlegroups.com (cc: adg@golang.org, golang-dev@googlegroups.com, gri@golang.org), I'd like you to review this change to https://go.googlecode.com/hg/go

[r, 2012-01-09 18:52:45]

leaving for rsc; not sure about the bisonerrors stuff

[renyi, 2012-01-09 21:10:38]

Russ wrote bisonerrors, an awk script that resides in cmd/gc/, to generate error messages by example of state stack. Beside that, it's nice to let goyacc output the numbered list of grammar rules in y.output so I don't need to count the rules' number when reading y.output. To use the generated error message, another interface is added as not to break the current Lexer interface. - ren On Tue, Jan 10, 2012 at 2:52 AM, <r@golang.org> wrote: > leaving for rsc; not sure about the bisonerrors stuff > > http://codereview.appspot.com/**5532045/<http://codereview.appspot.com/5532045/> >