122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2005.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_POINTER_CAST_HPP
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#define BOOST_POINTER_CAST_HPP
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#include <boost/config.hpp>
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namespace boost {
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//static_pointer_cast overload for raw pointers
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template<class T, class U>
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inline T* static_pointer_cast(U *ptr)
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{
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return static_cast<T*>(ptr);
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}
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//dynamic_pointer_cast overload for raw pointers
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template<class T, class U>
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inline T* dynamic_pointer_cast(U *ptr)
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{
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return dynamic_cast<T*>(ptr);
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}
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//const_pointer_cast overload for raw pointers
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template<class T, class U>
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inline T* const_pointer_cast(U *ptr)
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{
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return const_cast<T*>(ptr);
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}
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//reinterpret_pointer_cast overload for raw pointers
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template<class T, class U>
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inline T* reinterpret_pointer_cast(U *ptr)
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{
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return reinterpret_cast<T*>(ptr);
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}
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} // namespace boost
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#if !defined( BOOST_NO_CXX11_SMART_PTR )
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#include <boost/type_traits/has_virtual_destructor.hpp>
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#include <boost/static_assert.hpp>
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#include <memory>
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namespace boost {
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//static_pointer_cast overload for std::shared_ptr
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using std::static_pointer_cast;
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//dynamic_pointer_cast overload for std::shared_ptr
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using std::dynamic_pointer_cast;
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//const_pointer_cast overload for std::shared_ptr
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using std::const_pointer_cast;
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//reinterpret_pointer_cast overload for std::shared_ptr
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template<class T, class U> std::shared_ptr<T> reinterpret_pointer_cast(const std::shared_ptr<U> & r ) BOOST_NOEXCEPT
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{
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(void) reinterpret_cast< T* >( static_cast< U* >( 0 ) );
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typedef typename std::shared_ptr<T>::element_type E;
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E * p = reinterpret_cast< E* >( r.get() );
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return std::shared_ptr<T>( r, p );
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}
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//static_pointer_cast overload for std::unique_ptr
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template<class T, class U> std::unique_ptr<T> static_pointer_cast( std::unique_ptr<U> && r ) BOOST_NOEXCEPT
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{
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(void) static_cast< T* >( static_cast< U* >( 0 ) );
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typedef typename std::unique_ptr<T>::element_type E;
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return std::unique_ptr<T>( static_cast<E*>( r.release() ) );
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}
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//dynamic_pointer_cast overload for std::unique_ptr
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template<class T, class U> std::unique_ptr<T> dynamic_pointer_cast( std::unique_ptr<U> && r ) BOOST_NOEXCEPT
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{
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(void) dynamic_cast< T* >( static_cast< U* >( 0 ) );
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BOOST_STATIC_ASSERT_MSG( boost::has_virtual_destructor<T>::value, "The target of dynamic_pointer_cast must have a virtual destructor." );
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T * p = dynamic_cast<T*>( r.get() );
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if( p ) r.release();
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return std::unique_ptr<T>( p );
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}
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//const_pointer_cast overload for std::unique_ptr
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template<class T, class U> std::unique_ptr<T> const_pointer_cast( std::unique_ptr<U> && r ) BOOST_NOEXCEPT
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{
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(void) const_cast< T* >( static_cast< U* >( 0 ) );
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typedef typename std::unique_ptr<T>::element_type E;
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return std::unique_ptr<T>( const_cast<E*>( r.release() ) );
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}
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//reinterpret_pointer_cast overload for std::unique_ptr
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template<class T, class U> std::unique_ptr<T> reinterpret_pointer_cast( std::unique_ptr<U> && r ) BOOST_NOEXCEPT
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{
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(void) reinterpret_cast< T* >( static_cast< U* >( 0 ) );
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typedef typename std::unique_ptr<T>::element_type E;
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return std::unique_ptr<T>( reinterpret_cast<E*>( r.release() ) );
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}
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} // namespace boost
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#endif // #if !defined( BOOST_NO_CXX11_SMART_PTR )
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#endif //BOOST_POINTER_CAST_HPP
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