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Re: 3.3 problem: <ctype.h> and <iostream>

From: Martin Sebor <sebor at roguewave dot com>
To: libstdc++ at gcc dot gnu dot org
Date: Wed, 22 Jan 2003 17:42:23 -0700
Subject: Re: 3.3 problem: <ctype.h> and <iostream>
Organization: Rogue Wave Software, Inc.
References: <20030123003450.GA16479@attbi.com>
Reply-to: libstdc++ at gcc dot gnu dot org

Craig Rodrigues wrote:

Hi,

I just did a contrib/gcc_update in my CVS tree on the 3.3 branch
and am now encountering a new problem.

If I have the following file:

#include <ctype.h>
#include <iostream>
#include <ios>

...

Compiling it yields the following error on RedHat Linux 7.2 system:

...


If I change the order of the  includes to:

#include <iostream>
#include <ios>
#include <ctype.h>

Then the error goes away.

What's going on here?

What's most likely going on is that <ctype.h> #defines isspace()
et al and the macros interfere with the templates brought in from
<locale>. FWIW, because it's such a common problem, we ended up parenthesizing all references to isspace() and friends to avoid
these errors.

Regards
Martin

References:
- 3.3 problem: <ctype.h> and <iostream>
  - From: Craig Rodrigues

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