a89951c211
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@1103 7ec92016-0320-0410-acc4-a06ded1c099a
122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// Test program for The Loki Library
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// Copyright (c) 2008 Richard Sposato
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The authors make no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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// $Id$
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// ----------------------------------------------------------------------------
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// loki_smart_auto_ptr.cpp Test program for Loki::SmartPtr configured as
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// auto_ptr using Colvin-Gibbons trick
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <loki/SmartPtr.h>
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#include <memory>
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#include <iostream>
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#include <cstdlib>
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using namespace Loki;
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using namespace std;
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// ----------------------------------------------------------------------------
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class Base
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{
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public:
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virtual ~Base() {}
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virtual void Hello() { cout << "Base Hello, world!" << endl; }
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};
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// ----------------------------------------------------------------------------
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class Derived: public Base
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{
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public:
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virtual void Hello() { cout << "Derived Hello, world!" << endl; }
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};
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// ----------------------------------------------------------------------------
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typedef auto_ptr< Base > AutoPtrBase;
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typedef auto_ptr< Derived > AutoPtrDerived;
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typedef SmartPtr< Base, DestructiveCopy > SmartAutoPtrBase;
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typedef SmartPtr< Derived, DestructiveCopy > SmartAutoPtrDerived;
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// ----------------------------------------------------------------------------
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template <class TPtrBase>
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TPtrBase CreateBase()
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{
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return TPtrBase( new Base );
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}
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// ----------------------------------------------------------------------------
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template <class TPtrDerived>
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TPtrDerived CreateDerived()
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{
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return TPtrDerived( new Derived );
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}
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// ----------------------------------------------------------------------------
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template < class TPtrBase >
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void UseBase( TPtrBase ptr )
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{
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ptr->Hello();
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}
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// ----------------------------------------------------------------------------
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template < class TPtrBase, class TPtrDerived >
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void DoTest()
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{
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TPtrBase spb0 = CreateBase< TPtrBase >();
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TPtrBase spb1( spb0 );
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UseBase< TPtrBase >( CreateBase< TPtrBase >() );
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TPtrDerived spd1 = CreateDerived< TPtrDerived >();
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TPtrBase spb2( spd1 );
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// NOTE: this does not compile with gcc 4.3.1 also for std::auto_ptr;
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// it should work (Copy-initialization, base-from-derived)
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// according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/1997/N1128.pdf
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// It does compile with Visual C++ 8 (need to test with 9)
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// UseBase<TPtrBase>(CreateDerived<TPtrDerived>());
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// Quick fix
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UseBase< TPtrBase >( TPtrBase( CreateDerived< TPtrDerived >() ) );
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}
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// ----------------------------------------------------------------------------
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void TryColvinGibbonsTrick( void )
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{
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DoTest<AutoPtrBase, AutoPtrDerived>(); // OK
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DoTest<SmartAutoPtrBase, SmartAutoPtrDerived>(); // FIXME: eror:
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// assignment of read-only reference 'val'
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}
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// ----------------------------------------------------------------------------
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