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Newsgroups: comp.lang.ada
Subject: Re: lexical ambiguity
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From: M E Leypold <development-2006-8ecbb5cc8a-REMOVETHIS@m-e-leypold.de>
Date: 06 Jun 2006 13:38:06 +0200
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Date: 2006-06-06T13:38:06+02:00
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Georg Bauhaus <bauhaus@futureapps.de> writes:

> On Mon, 2006-06-05 at 22:11 +0000, Jeffrey R. Carter wrote:
> > Keith Thompson wrote:
> > > 
> > > If I recall correctly, it's sufficient to remember what the previous
> > > token was.  A character literal cannot follow an identifier.
> > 
> > Right, so it must be either an attribute, a qualified expression, or an 
> > error. 
> 
> Though the previous token shouldn't be a reserved word, as in
> 
>  if'('="-"("="('='=',',','=','))

Or 

   return'a'; 

So now (question to all): Is the following rule enough?

   - "'" is the beginning of a character literal if the token before
     "'" has not been an identifier (reserved words not counted as
     identifier in this case).

Regards -- Markus