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Date: Sun, 15 Sep 2002 19:16:41 +0100
From: Matt Kern <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: libstdc++5-dev: constness problem with std::set
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Package: libstdc++5-dev
Version: 1:3.2.1-0pre1
Severity: normal
The following fragment generates an error for me:
======================================================================
#include <set>
template <class T>
class AutoPtr
{
public:
T* getObjectPtr () { return 0; }
const T* getObjectPtr () const { return 0; }
};
class WrappedClass
{
};
class TestClass
{
private:
typedef std::set<AutoPtr<WrappedClass> > WrappedClassList;
WrappedClassList _objects;
public:
void testMethod () {
for (WrappedClassList::iterator i=_objects.begin (); i!=_objects.end ();
++i)
WrappedClass* C = (*i).getObjectPtr ();
}
};
======================================================================
when compiled with: g++-3.2 test.cpp
test.cpp: In member function `void TestClass::testMethod()':
test.cpp:27: invalid conversion from `const WrappedClass*' to `WrappedClass*'
I cannot work out if the bug is caused by my installing the debian
packages on woody rather than unstable. However, the fragment
compiles correctly if std::vector is used in place of std::set.
If the "const T* getObjectPtr () const { return 0; }" line is removed,
it gives the following:
test.cpp: In member function `void TestClass::testMethod()':
test.cpp:26: passing `const AutoPtr<WrappedClass>' as `this' argument of `T*
AutoPtr<T>::getObjectPtr() [with T = WrappedClass]' discards qualifiers
Regards,
Matt
-- System Information
Debian Release: 3.0
Architecture: i386
Kernel: Linux xanadu 2.4.20pre7int #1 SMP Sat Sep 14 09:47:58 BST 2002 i686
Locale: LANG=C, LC_CTYPE=
Versions of packages libstdc++5-dev depends on:
ii g++-3.2 1:3.2.1-0pre1 The GNU C++ compiler.
ii gcc-3.2-base 1:3.2.1-0pre1 The GNU Compiler Collection (base
ii libc6-dev 2.2.5-14.2 GNU C Library: Development Librari
ii libstdc++5 1:3.2.1-0pre1 The GNU stdc++ library version 3
---------------------------------------
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Date: Mon, 16 Sep 2002 08:40:36 -0400
From: Daniel Jacobowitz <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: libstdc++5-dev: not a bug
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This is the standard behavior.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
