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

From: Akim Demaille
Subject: Re: [PATCH] tests: check the use of dashes and periods in symbols.
Date: Mon, 4 May 2009 10:17:37 +0200

Le 1 mai 09 à 05:17, Joel E. Denny a écrit :

Hi Joel!  (FWIW, spelled Joël in French :)

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.

OK, I'll address that in the near future.

By the way, in the NEWS entry for 2.5, are we ready to announce the
ability to put dashes in grammar symbol names?

Yes, I think we are. But I don't remember you gave your opinion about the names: given that _ and . are valid symbol names per POSIX, do we agree that - should be too?

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