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151 lines
3.6 KiB
151 lines
3.6 KiB
// |
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// Boost.Pointer Container |
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// |
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// Copyright Thorsten Ottosen 2003-2007. Use, modification and |
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// distribution is subject to the Boost Software License, Version |
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// 1.0. (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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// For more information, see http://www.boost.org/libs/ptr_container/ |
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// |
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#ifndef BOOST_PTR_CONTAINER_INDIRECT_FUN_HPP |
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#define BOOST_PTR_CONTAINER_INDIRECT_FUN_HPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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#pragma once |
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#endif |
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#include <boost/config.hpp> |
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#ifdef BOOST_NO_SFINAE |
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#else |
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#include <boost/utility/result_of.hpp> |
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#include <boost/pointee.hpp> |
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#endif // BOOST_NO_SFINAE |
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#include <boost/assert.hpp> |
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#include <boost/static_assert.hpp> |
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#include <boost/type_traits/is_void.hpp> |
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#include <functional> |
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namespace boost |
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{ |
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namespace ptr_container_detail |
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{ |
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template <typename Type, typename Dummy> |
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struct make_lazy |
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{ |
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typedef typename Type::type type; |
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}; |
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} |
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template |
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< |
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class Fun |
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#ifdef BOOST_NO_SFINAE |
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, class Result = bool |
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#endif |
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> |
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class indirect_fun |
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{ |
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Fun fun; |
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public: |
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indirect_fun() : fun(Fun()) |
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{ } |
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indirect_fun( Fun f ) : fun(f) |
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{ } |
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template< class T > |
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#ifdef BOOST_NO_SFINAE |
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Result |
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#else |
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typename boost::result_of< const Fun( typename pointee<T>::type& ) >::type |
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#endif |
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operator()( const T& r ) const |
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{ |
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return fun( *r ); |
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} |
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template< class T, class U > |
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#ifdef BOOST_NO_SFINAE |
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Result |
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#else |
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typename boost::result_of< const Fun( typename pointee<T>::type&, |
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typename pointee<U>::type& ) >::type |
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#endif |
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operator()( const T& r, const U& r2 ) const |
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{ |
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return fun( *r, *r2 ); |
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} |
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}; |
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template< class Fun > |
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inline indirect_fun<Fun> make_indirect_fun( Fun f ) |
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{ |
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return indirect_fun<Fun>( f ); |
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} |
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template |
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< |
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class Fun, |
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class Arg1, |
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class Arg2 = Arg1 |
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#ifdef BOOST_NO_SFINAE |
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, class Result = bool |
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#endif |
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> |
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class void_ptr_indirect_fun |
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{ |
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Fun fun; |
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public: |
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void_ptr_indirect_fun() : fun(Fun()) |
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{ } |
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void_ptr_indirect_fun( Fun f ) : fun(f) |
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{ } |
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template< class Void > |
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#ifdef BOOST_NO_SFINAE |
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Result |
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#else |
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typename ptr_container_detail::make_lazy< |
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boost::result_of<const Fun(const Arg1&)>, Void>::type |
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#endif |
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operator()( const Void* r ) const |
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{ |
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BOOST_STATIC_ASSERT(boost::is_void<Void>::value); |
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BOOST_ASSERT( r != 0 ); |
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return fun( * static_cast<const Arg1*>( r ) ); |
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} |
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template< class Void > |
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#ifdef BOOST_NO_SFINAE |
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Result |
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#else |
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typename ptr_container_detail::make_lazy< |
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boost::result_of<const Fun(const Arg1&, const Arg2&)>, Void>::type |
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#endif |
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operator()( const Void* l, const Void* r ) const |
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{ |
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BOOST_STATIC_ASSERT(boost::is_void<Void>::value); |
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BOOST_ASSERT( l != 0 && r != 0 ); |
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return fun( * static_cast<const Arg1*>( l ), * static_cast<const Arg2*>( r ) ); |
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} |
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}; |
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template< class Arg, class Fun > |
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inline void_ptr_indirect_fun<Fun,Arg> make_void_ptr_indirect_fun( Fun f ) |
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{ |
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return void_ptr_indirect_fun<Fun,Arg>( f ); |
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} |
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} // namespace 'boost' |
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#endif
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