Re: c++/3230: False warning for 'returning reference to temporary'

[Gabriel Dos Reis <gdr@codesourcery.com>]

The following reply was made to PR c++/3230; it has been noted by GNATS.

From: Gabriel Dos Reis <gdr@codesourcery.com>
To: jason@gcc.gnu.org
Cc: andrewp@andypo.net, gcc-bugs@gcc.gnu.org, gdr@gcc.gnu.org,
   gcc-gnats@gcc.gnu.org
Subject: Re: c++/3230: False warning for 'returning reference to temporary'
Date: 21 Mar 2002 09:17:51 +0100

 jason@gcc.gnu.org writes:
 
 | Synopsis: False warning for 'returning reference to temporary'
 | 
 | Responsible-Changed-From-To: gdr->jason
 | Responsible-Changed-By: jason
 | Responsible-Changed-When: Mon Mar 18 06:02:19 2002
 | Responsible-Changed-Why:
 |     mine
 | State-Changed-From-To: analyzed->closed
 | State-Changed-By: jason
 | State-Changed-When: Mon Mar 18 06:02:19 2002
 | State-Changed-Why:
 |     This is not a bug in the compiler.  The standard (5.16) says that the result of your ?: expression is an rvalue, because the two options do not have the same type.  As a result, the return value binds to that rvalue, which is a local temporary.  The EDG compiler gives the same warning.
 
 OK.
 
 |     You may feel that this is a bug in the standard, and I'd be
 | inclined to agree.  But until the standard is fixed, the compiler will
 | continue to work this way.
 
 I'll raise the issue on the core group refelector.
 
 -- Gaby