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RE: warn/croak on "string" "string" auto-joins

From: "Dave Korn" <dk at artimi dot com>
To: "'Paul Koning'" <pkoning at equallogic dot com>,<dewar at gnat dot com>
Cc: <zack at codesourcery dot com>,<haircut at gmail dot com>,<gcc at gcc dot gnu dot org>
Date: Wed, 18 Aug 2004 19:02:56 +0100
Subject: RE: warn/croak on "string" "string" auto-joins

> -----Original Message-----
> From: gcc-owner On Behalf Of Paul Koning
> Sent: 18 August 2004 14:10

> >>>>> "Robert" == Robert Dewar <dewar@gnat.com> writes:
> 
>  Robert> Zack Weinberg wrote:
>  >> Adam Monsen <haircut@gmail.com> writes:
>  >> 
>  >> 
>  >>> String auto-joins can be dangerous. Is there a way to tell the
>  >>> compiler to warn/croak when an auto-join occurs?
>  >> 
>  >> 
>  >> There is not, and without a way for the programmer to make clear
>  >> that a given use of string-constant concatenation is intentional,
>  >> I am reluctant to add one.
> 
>  Robert> I would think the reasonable condition for the warning is
>  Robert> that no line feed appears between the two strings, which is
>  Robert> indeed unusual usage.
> 
> It's usual in macros.
> 
>      paul


  Yep.  I would have thought that concatenation that *is* across a linefeed
is most likely to be the case when someone's accidentally omitted a comma
from a list of strings.


    cheers, 
      DaveK
-- 
Can't think of a witty .sigline today....

References:
- Re: warn/croak on "string" "string" auto-joins
  - From: Paul Koning

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