Re: [PATCH] tests: check the use of dashes and periods in symbols.

[Akim Demaille]

Le 21 avr. 09 à 22:17, Akim Demaille a écrit :

> +# Period are genuine letters, they can start identifiers.  Dashes
> +# and digits can't.
> +AT_DATA_GRAMMAR([input.y],
> +[[%token .good
> +%token -wrong
> +%token 1nv4l1d
> +%%
> +start: .good
> +]])
> +AT_BISON_CHECK([-o input.c input.y], [1], [],
> +[[input.y:10.8: invalid character: `-'
> +input.y:11.8: syntax error, unexpected integer, expecting char or  
> identifier or <tag>
> +]])

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.