Add shared_ptr constructor taking std::unique_ptr. Refs #6625.

[SVN r81131]

test/sp_unique_ptr_test.cpp

@@ -0,0 +1,152 @@
+//
+//  sp_unique_ptr_test.cpp
+//
+//  Copyright (c) 2012 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <memory>
+#include <utility>
+
+#if !defined( BOOST_NO_CXX11_SMART_PTR )
+
+struct X: public boost::enable_shared_from_this< X >
+{
+    static int instances;
+
+    X()
+    {
+        ++instances;
+    }
+
+    ~X()
+    {
+        --instances;
+    }
+
+private:
+
+    X( X const & );
+    X & operator=( X const & );
+};
+
+int X::instances = 0;
+
+struct Y
+{
+    static int instances;
+
+    bool deleted_;
+
+    Y(): deleted_( false )
+    {
+        ++instances;
+    }
+
+    ~Y()
+    {
+        BOOST_TEST( deleted_ );
+        --instances;
+    }
+
+private:
+
+    Y( Y const & );
+    Y & operator=( Y const & );
+};
+
+int Y::instances = 0;
+
+struct YD
+{
+    void operator()( Y* p ) const
+    {
+        p->deleted_ = true;
+        delete p;
+    }
+};
+
+int main()
+{
+    {
+        BOOST_TEST( X::instances == 0 );
+
+        std::unique_ptr<X> p( new X );
+        BOOST_TEST( X::instances == 1 );
+
+        boost::shared_ptr<X> p2( std::move( p ) );
+        BOOST_TEST( X::instances == 1 );
+        BOOST_TEST( p.get() == 0 );
+
+        boost::shared_ptr<X> p3 = p2->shared_from_this();
+        BOOST_TEST( p2 == p3 );
+        BOOST_TEST( !(p2 < p3) && !(p3 < p2) );
+
+        p2.reset();
+        p3.reset();
+        BOOST_TEST( X::instances == 0 );
+    }
+
+    {
+        BOOST_TEST( Y::instances == 0 );
+
+        std::unique_ptr<Y, YD> p( new Y, YD() );
+        BOOST_TEST( Y::instances == 1 );
+
+        boost::shared_ptr<Y> p2( std::move( p ) );
+        BOOST_TEST( Y::instances == 1 );
+        BOOST_TEST( p.get() == 0 );
+
+        p2.reset();
+        BOOST_TEST( Y::instances == 0 );
+    }
+
+    {
+        BOOST_TEST( Y::instances == 0 );
+
+        YD yd;
+
+        std::unique_ptr<Y, YD&> p( new Y, yd );
+        BOOST_TEST( Y::instances == 1 );
+
+        boost::shared_ptr<Y> p2( std::move( p ) );
+        BOOST_TEST( Y::instances == 1 );
+        BOOST_TEST( p.get() == 0 );
+
+        p2.reset();
+        BOOST_TEST( Y::instances == 0 );
+    }
+
+    {
+        BOOST_TEST( Y::instances == 0 );
+
+        YD yd;
+
+        std::unique_ptr<Y, YD const&> p( new Y, yd );
+        BOOST_TEST( Y::instances == 1 );
+
+        boost::shared_ptr<Y> p2( std::move( p ) );
+        BOOST_TEST( Y::instances == 1 );
+        BOOST_TEST( p.get() == 0 );
+
+        p2.reset();
+        BOOST_TEST( Y::instances == 0 );
+    }
+
+    return boost::report_errors();
+}
+
+#else // !defined( BOOST_NO_CXX11_SMART_PTR )
+
+int main()
+{
+    return 0;
+}
+
+#endif