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c++/2349: Compiler generated copy-constructor generates warning for unused argument.
- To: gcc-gnats at gcc dot gnu dot org
- Subject: c++/2349: Compiler generated copy-constructor generates warning for unused argument.
- From: bumgard at roguewave dot com
- Date: 22 Mar 2001 23:19:44 -0000
- Reply-To: bumgard at roguewave dot com
>Number: 2349
>Category: c++
>Synopsis: Compiler generated copy-constructor generates warning for unused argument.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Mar 22 15:26:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Greg Bumgardner
>Release: gcc 3.1 as of 2001-03-22
>Organization:
>Environment:
Redhat Linux 2.2.16
>Description:
Compiler generated copy-constructors produce warnings
for unused argument if class has virtual destructor and
no members, and the compiler-generated copy-constructor
is used to initialize an instance.
This problem seems to be very specific.
>How-To-Repeat:
c++ -W -Wall -Werror simple.cpp
produces:
cc1plus: warnings being treated as errors
simple.cpp: In method `Foo::Foo(const Foo&)':
simple.cpp:1: warning: unused parameter `const Foo&_ctor_arg'
>Fix:
Unknown.
This error was introduced sometime in the last month.
>Release-Note:
>Audit-Trail:
>Unformatted:
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