738 lines
26 KiB
Plaintext
738 lines
26 KiB
Plaintext
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// Boost Lambda Library -- member_ptr.hpp ---------------------
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// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
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// Copyright (C) 2000 Gary Powell (gary.powell@sierra.com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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 www.boost.org
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// --------------------------------------------------------------------------
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#if !defined(BOOST_LAMBDA_MEMBER_PTR_HPP)
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#define BOOST_LAMBDA_MEMBER_PTR_HPP
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namespace boost {
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namespace lambda {
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class member_pointer_action {};
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namespace detail {
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// the boost type_traits member_pointer traits are not enough,
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// need to know more details.
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template<class T>
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struct member_pointer {
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typedef typename boost::add_reference<T>::type type;
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typedef detail::unspecified class_type;
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typedef detail::unspecified qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = false);
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};
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template<class T, class U>
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struct member_pointer<T U::*> {
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typedef typename boost::add_reference<T>::type type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = true);
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BOOST_STATIC_CONSTANT(bool, is_function_member = false);
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};
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template<class T, class U>
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struct member_pointer<const T U::*> {
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typedef typename boost::add_reference<const T>::type type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = true);
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BOOST_STATIC_CONSTANT(bool, is_function_member = false);
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};
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template<class T, class U>
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struct member_pointer<volatile T U::*> {
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typedef typename boost::add_reference<volatile T>::type type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = true);
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BOOST_STATIC_CONSTANT(bool, is_function_member = false);
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};
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template<class T, class U>
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struct member_pointer<const volatile T U::*> {
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typedef typename boost::add_reference<const volatile T>::type type;
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typedef U class_type;
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typedef const volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = true);
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BOOST_STATIC_CONSTANT(bool, is_function_member = false);
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};
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// -- nonconst member functions --
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template<class T, class U>
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struct member_pointer<T (U::*)()> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1>
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struct member_pointer<T (U::*)(A1)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2>
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struct member_pointer<T (U::*)(A1, A2)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3>
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struct member_pointer<T (U::*)(A1, A2, A3)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4>
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struct member_pointer<T (U::*)(A1, A2, A3, A4)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8, class A9>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9)> {
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typedef T type;
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typedef U class_type;
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typedef U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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// -- const member functions --
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template<class T, class U>
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struct member_pointer<T (U::*)() const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1>
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struct member_pointer<T (U::*)(A1) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2>
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struct member_pointer<T (U::*)(A1, A2) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3>
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struct member_pointer<T (U::*)(A1, A2, A3) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4>
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struct member_pointer<T (U::*)(A1, A2, A3, A4) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8, class A9>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) const> {
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typedef T type;
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typedef U class_type;
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typedef const U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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// -- volatile --
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template<class T, class U>
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struct member_pointer<T (U::*)() volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1>
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struct member_pointer<T (U::*)(A1) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2>
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struct member_pointer<T (U::*)(A1, A2) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3>
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struct member_pointer<T (U::*)(A1, A2, A3) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4>
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struct member_pointer<T (U::*)(A1, A2, A3, A4) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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class A6, class A7, class A8>
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struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) volatile> {
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typedef T type;
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typedef U class_type;
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typedef volatile U qualified_class_type;
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BOOST_STATIC_CONSTANT(bool, is_data_member = false);
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BOOST_STATIC_CONSTANT(bool, is_function_member = true);
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};
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template<class T, class U, class A1, class A2, class A3, class A4, class A5,
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|
|
class A6, class A7, class A8, class A9>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
// -- const volatile
|
||
|
|
template<class T, class U>
|
||
|
|
struct member_pointer<T (U::*)() const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1>
|
||
|
|
struct member_pointer<T (U::*)(A1) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4, class A5>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4, class A5,
|
||
|
|
class A6>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4, class A5,
|
||
|
|
class A6, class A7>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4, class A5,
|
||
|
|
class A6, class A7, class A8>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
template<class T, class U, class A1, class A2, class A3, class A4, class A5,
|
||
|
|
class A6, class A7, class A8, class A9>
|
||
|
|
struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) const volatile> {
|
||
|
|
typedef T type;
|
||
|
|
typedef U class_type;
|
||
|
|
typedef const volatile U qualified_class_type;
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_data_member = false);
|
||
|
|
BOOST_STATIC_CONSTANT(bool, is_function_member = true);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // detail
|
||
|
|
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
// this class holds a pointer to a member function and the object.
|
||
|
|
// when called, it just calls the member function with the parameters
|
||
|
|
// provided
|
||
|
|
|
||
|
|
// It would have been possible to use existing lambda_functors to represent
|
||
|
|
// a bound member function like this, but to have a separate template is
|
||
|
|
// safer, since now this functor doesn't mix and match with lambda_functors
|
||
|
|
// only thing you can do with this is to call it
|
||
|
|
|
||
|
|
// note that previously instantiated classes
|
||
|
|
// (other_action<member_pointer_action> and member_pointer_action_helper
|
||
|
|
// guarantee, that A and B are
|
||
|
|
// such types, that for objects a and b of corresponding types, a->*b leads
|
||
|
|
// to the builtin ->* to be called. So types that would end in a call to
|
||
|
|
// a user defined ->* do not create a member_pointer_caller object.
|
||
|
|
|
||
|
|
template<class RET, class A, class B>
|
||
|
|
class member_pointer_caller {
|
||
|
|
A a; B b;
|
||
|
|
|
||
|
|
public:
|
||
|
|
member_pointer_caller(const A& aa, const B& bb) : a(aa), b(bb) {}
|
||
|
|
|
||
|
|
RET operator()() const { return (a->*b)(); }
|
||
|
|
|
||
|
|
template<class A1>
|
||
|
|
RET operator()(const A1& a1) const { return (a->*b)(a1); }
|
||
|
|
|
||
|
|
template<class A1, class A2>
|
||
|
|
RET operator()(const A1& a1, const A2& a2) const { return (a->*b)(a1, a2); }
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3) const {
|
||
|
|
return (a->*b)(a1, a2, a3);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3,
|
||
|
|
const A4& a4) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4, class A5>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4,
|
||
|
|
const A5& a5) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4, a5);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4, class A5, class A6>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4,
|
||
|
|
const A5& a5, const A6& a6) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4, a5, a6);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4, class A5, class A6,
|
||
|
|
class A7>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4,
|
||
|
|
const A5& a5, const A6& a6, const A7& a7) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4, a5, a6, a7);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4, class A5, class A6,
|
||
|
|
class A7, class A8>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4,
|
||
|
|
const A5& a5, const A6& a6, const A7& a7,
|
||
|
|
const A8& a8) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4, a5, a6, a7, a8);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A1, class A2, class A3, class A4, class A5, class A6,
|
||
|
|
class A7, class A8, class A9>
|
||
|
|
RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4,
|
||
|
|
const A5& a5, const A6& a6, const A7& a7,
|
||
|
|
const A8& a8, const A9& a9) const {
|
||
|
|
return (a->*b)(a1, a2, a3, a4, a5, a6, a7, a8, a9);
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
// helper templates for return type deduction and action classes
|
||
|
|
// different cases for data member, function member, neither
|
||
|
|
|
||
|
|
// true-true case
|
||
|
|
template <bool Is_data_member, bool Is_function_member>
|
||
|
|
struct member_pointer_action_helper;
|
||
|
|
// cannot be both, no body provided
|
||
|
|
|
||
|
|
// data member case
|
||
|
|
// this means, that B is a data member and A is a pointer type,
|
||
|
|
// so either built-in ->* should be called, or there is an error
|
||
|
|
template <>
|
||
|
|
struct member_pointer_action_helper<true, false> {
|
||
|
|
public:
|
||
|
|
|
||
|
|
template<class RET, class A, class B>
|
||
|
|
static RET apply(A& a, B& b) {
|
||
|
|
return a->*b;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A, class B>
|
||
|
|
struct return_type {
|
||
|
|
private:
|
||
|
|
typedef typename detail::remove_reference_and_cv<B>::type plainB;
|
||
|
|
|
||
|
|
typedef typename detail::member_pointer<plainB>::type type0;
|
||
|
|
// we remove the reference now, as we may have to add cv:s
|
||
|
|
typedef typename boost::remove_reference<type0>::type type1;
|
||
|
|
|
||
|
|
// A is a reference to pointer
|
||
|
|
// remove the top level cv qualifiers and reference
|
||
|
|
typedef typename
|
||
|
|
detail::remove_reference_and_cv<A>::type non_ref_A;
|
||
|
|
|
||
|
|
// A is a pointer type, so take the type pointed to
|
||
|
|
typedef typename ::boost::remove_pointer<non_ref_A>::type non_pointer_A;
|
||
|
|
|
||
|
|
public:
|
||
|
|
// For non-reference types, we must add const and/or volatile if
|
||
|
|
// the pointer type has these qualifiers
|
||
|
|
// If the member is a reference, these do not have any effect
|
||
|
|
// (cv T == T if T is a reference type)
|
||
|
|
typedef typename detail::IF<
|
||
|
|
::boost::is_const<non_pointer_A>::value,
|
||
|
|
typename ::boost::add_const<type1>::type,
|
||
|
|
type1
|
||
|
|
>::RET type2;
|
||
|
|
typedef typename detail::IF<
|
||
|
|
::boost::is_volatile<non_pointer_A>::value,
|
||
|
|
typename ::boost::add_volatile<type2>::type,
|
||
|
|
type2
|
||
|
|
>::RET type3;
|
||
|
|
// add reference back
|
||
|
|
typedef typename ::boost::add_reference<type3>::type type;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
// neither case
|
||
|
|
template <>
|
||
|
|
struct member_pointer_action_helper<false, false> {
|
||
|
|
public:
|
||
|
|
template<class RET, class A, class B>
|
||
|
|
static RET apply(A& a, B& b) {
|
||
|
|
// not a built in member pointer operator, just call ->*
|
||
|
|
return a->*b;
|
||
|
|
}
|
||
|
|
// an overloaded member pointer operators, user should have specified
|
||
|
|
// the return type
|
||
|
|
// At this point we know that there is no matching specialization for
|
||
|
|
// return_type_2, so try return_type_2_plain
|
||
|
|
template<class A, class B>
|
||
|
|
struct return_type {
|
||
|
|
|
||
|
|
typedef typename plain_return_type_2<
|
||
|
|
other_action<member_pointer_action>, A, B
|
||
|
|
>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// member pointer function case
|
||
|
|
// This is a built in ->* call for a member function,
|
||
|
|
// the only thing that you can do with that, is to give it some arguments
|
||
|
|
// note, it is guaranteed that A is a pointer type, and thus it cannot
|
||
|
|
// be a call to overloaded ->*
|
||
|
|
template <>
|
||
|
|
struct member_pointer_action_helper<false, true> {
|
||
|
|
public:
|
||
|
|
|
||
|
|
template<class RET, class A, class B>
|
||
|
|
static RET apply(A& a, B& b) {
|
||
|
|
typedef typename ::boost::remove_cv<B>::type plainB;
|
||
|
|
typedef typename detail::member_pointer<plainB>::type ret_t;
|
||
|
|
typedef typename ::boost::remove_cv<A>::type plainA;
|
||
|
|
|
||
|
|
// we always strip cv:s to
|
||
|
|
// make the two routes (calling and type deduction)
|
||
|
|
// to give the same results (and the const does not make any functional
|
||
|
|
// difference)
|
||
|
|
return detail::member_pointer_caller<ret_t, plainA, plainB>(a, b);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A, class B>
|
||
|
|
struct return_type {
|
||
|
|
typedef typename detail::remove_reference_and_cv<B>::type plainB;
|
||
|
|
typedef typename detail::member_pointer<plainB>::type ret_t;
|
||
|
|
typedef typename detail::remove_reference_and_cv<A>::type plainA;
|
||
|
|
|
||
|
|
typedef detail::member_pointer_caller<ret_t, plainA, plainB> type;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
} // detail
|
||
|
|
|
||
|
|
template<> class other_action<member_pointer_action> {
|
||
|
|
public:
|
||
|
|
template<class RET, class A, class B>
|
||
|
|
static RET apply(A& a, B& b) {
|
||
|
|
typedef typename
|
||
|
|
::boost::remove_cv<B>::type plainB;
|
||
|
|
|
||
|
|
return detail::member_pointer_action_helper<
|
||
|
|
boost::is_pointer<A>::value &&
|
||
|
|
detail::member_pointer<plainB>::is_data_member,
|
||
|
|
boost::is_pointer<A>::value &&
|
||
|
|
detail::member_pointer<plainB>::is_function_member
|
||
|
|
>::template apply<RET>(a, b);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// return type deduction --
|
||
|
|
|
||
|
|
// If the right argument is a pointer to data member,
|
||
|
|
// and the left argument is of compatible pointer to class type
|
||
|
|
// return type is a reference to the data member type
|
||
|
|
|
||
|
|
// if right argument is a pointer to a member function, and the left
|
||
|
|
// argument is of a compatible type, the return type is a
|
||
|
|
// member_pointer_caller (see above)
|
||
|
|
|
||
|
|
// Otherwise, return type deduction fails. There is either an error,
|
||
|
|
// or the user is trying to call an overloaded ->*
|
||
|
|
// In such a case either ret<> must be used, or a return_type_2 user
|
||
|
|
// defined specialization must be provided
|
||
|
|
|
||
|
|
|
||
|
|
template<class A, class B>
|
||
|
|
struct return_type_2<other_action<member_pointer_action>, A, B> {
|
||
|
|
private:
|
||
|
|
typedef typename
|
||
|
|
detail::remove_reference_and_cv<B>::type plainB;
|
||
|
|
public:
|
||
|
|
typedef typename
|
||
|
|
detail::member_pointer_action_helper<
|
||
|
|
detail::member_pointer<plainB>::is_data_member,
|
||
|
|
detail::member_pointer<plainB>::is_function_member
|
||
|
|
>::template return_type<A, B>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
// this is the way the generic lambda_functor_base functions instantiate
|
||
|
|
// return type deduction. We turn it into return_type_2, so that the
|
||
|
|
// user can provide specializations on that level.
|
||
|
|
template<class Args>
|
||
|
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struct return_type_N<other_action<member_pointer_action>, Args> {
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||
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|
typedef typename boost::tuples::element<0, Args>::type A;
|
||
|
|
typedef typename boost::tuples::element<1, Args>::type B;
|
||
|
|
typedef typename
|
||
|
|
return_type_2<other_action<member_pointer_action>,
|
||
|
|
typename boost::remove_reference<A>::type,
|
||
|
|
typename boost::remove_reference<B>::type
|
||
|
|
>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<class Arg1, class Arg2>
|
||
|
|
inline const
|
||
|
|
lambda_functor<
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<lambda_functor<Arg1>, typename const_copy_argument<Arg2>::type>
|
||
|
|
>
|
||
|
|
>
|
||
|
|
operator->*(const lambda_functor<Arg1>& a1, const Arg2& a2)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<lambda_functor<Arg1>, typename const_copy_argument<Arg2>::type>
|
||
|
|
>
|
||
|
|
(tuple<lambda_functor<Arg1>,
|
||
|
|
typename const_copy_argument<Arg2>::type>(a1, a2));
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class Arg1, class Arg2>
|
||
|
|
inline const
|
||
|
|
lambda_functor<
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<lambda_functor<Arg1>, lambda_functor<Arg2> >
|
||
|
|
>
|
||
|
|
>
|
||
|
|
operator->*(const lambda_functor<Arg1>& a1, const lambda_functor<Arg2>& a2)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<lambda_functor<Arg1>, lambda_functor<Arg2> >
|
||
|
|
>
|
||
|
|
(tuple<lambda_functor<Arg1>, lambda_functor<Arg2> >(a1, a2));
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class Arg1, class Arg2>
|
||
|
|
inline const
|
||
|
|
lambda_functor<
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<typename const_copy_argument<Arg1>::type, lambda_functor<Arg2> >
|
||
|
|
>
|
||
|
|
>
|
||
|
|
operator->*(const Arg1& a1, const lambda_functor<Arg2>& a2)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
lambda_functor_base<
|
||
|
|
action<2, other_action<member_pointer_action> >,
|
||
|
|
tuple<typename const_copy_argument<Arg1>::type, lambda_functor<Arg2> >
|
||
|
|
>
|
||
|
|
(tuple<typename const_copy_argument<Arg1>::type,
|
||
|
|
lambda_functor<Arg2> >(a1, a2));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace lambda
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|