On Tue, 21 Apr 2009, Akim Demaille wrote:
> The asymmetry between dashes and period is not something I am deeply attached
> to. POSIX says "Names are of arbitrary length, made up of letters, periods
> (.), underscores (_) and non-initial digits." so I'm fine with just adding `-'
> to the {letter}. Yet the error messages should probably be improved. Maybe
> catching "words" starting with dashes and digits, and complaining about them,
> in order to have
>
> invalid identifier: -wrong
> invalid identifier: 1nv4l1d
>
> instead of what we currently have.
That would at least fix this case:
%token TOK1 1TOK
for which Bison currently assigns 1 to TOK1 and recognizes a separate TOK.
By the way, in the NEWS entry for 2.5, are we ready to announce the
ability to put dashes in grammar symbol names?
