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-rw-r--r--boost/detail/ob_call_traits.hpp168
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diff --git a/boost/detail/ob_call_traits.hpp b/boost/detail/ob_call_traits.hpp
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-// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
-// Use, modification and distribution are subject to 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).
-//
-// See http://www.boost.org/libs/utility for most recent version including documentation.
-//
-// Crippled version for crippled compilers:
-// see libs/utility/call_traits.htm
-//
-
-/* Release notes:
- 01st October 2000:
- Fixed call_traits on VC6, using "poor man's partial specialisation",
- using ideas taken from "Generative programming" by Krzysztof Czarnecki
- & Ulrich Eisenecker.
-*/
-
-#ifndef BOOST_OB_CALL_TRAITS_HPP
-#define BOOST_OB_CALL_TRAITS_HPP
-
-#ifndef BOOST_CONFIG_HPP
-#include <boost/config.hpp>
-#endif
-
-#ifndef BOOST_ARITHMETIC_TYPE_TRAITS_HPP
-#include <boost/type_traits/arithmetic_traits.hpp>
-#endif
-#ifndef BOOST_COMPOSITE_TYPE_TRAITS_HPP
-#include <boost/type_traits/composite_traits.hpp>
-#endif
-
-namespace boost{
-
-#ifdef BOOST_MSVC6_MEMBER_TEMPLATES
-//
-// use member templates to emulate
-// partial specialisation:
-//
-namespace detail{
-
-template <class T>
-struct standard_call_traits
-{
- typedef T value_type;
- typedef T& reference;
- typedef const T& const_reference;
- typedef const T& param_type;
-};
-template <class T>
-struct simple_call_traits
-{
- typedef T value_type;
- typedef T& reference;
- typedef const T& const_reference;
- typedef const T param_type;
-};
-template <class T>
-struct reference_call_traits
-{
- typedef T value_type;
- typedef T reference;
- typedef T const_reference;
- typedef T param_type;
-};
-
-template <bool pointer, bool arithmetic, bool reference>
-struct call_traits_chooser
-{
- template <class T>
- struct rebind
- {
- typedef standard_call_traits<T> type;
- };
-};
-
-template <>
-struct call_traits_chooser<true, false, false>
-{
- template <class T>
- struct rebind
- {
- typedef simple_call_traits<T> type;
- };
-};
-
-template <>
-struct call_traits_chooser<false, false, true>
-{
- template <class T>
- struct rebind
- {
- typedef reference_call_traits<T> type;
- };
-};
-
-template <bool size_is_small>
-struct call_traits_sizeof_chooser2
-{
- template <class T>
- struct small_rebind
- {
- typedef simple_call_traits<T> small_type;
- };
-};
-
-template<>
-struct call_traits_sizeof_chooser2<false>
-{
- template <class T>
- struct small_rebind
- {
- typedef standard_call_traits<T> small_type;
- };
-};
-
-template <>
-struct call_traits_chooser<false, true, false>
-{
- template <class T>
- struct rebind
- {
- enum { sizeof_choice = (sizeof(T) <= sizeof(void*)) };
- typedef call_traits_sizeof_chooser2<(sizeof(T) <= sizeof(void*))> chooser;
- typedef typename chooser::template small_rebind<T> bound_type;
- typedef typename bound_type::small_type type;
- };
-};
-
-} // namespace detail
-template <typename T>
-struct call_traits
-{
-private:
- typedef detail::call_traits_chooser<
- ::boost::is_pointer<T>::value,
- ::boost::is_arithmetic<T>::value,
- ::boost::is_reference<T>::value
- > chooser;
- typedef typename chooser::template rebind<T> bound_type;
- typedef typename bound_type::type call_traits_type;
-public:
- typedef typename call_traits_type::value_type value_type;
- typedef typename call_traits_type::reference reference;
- typedef typename call_traits_type::const_reference const_reference;
- typedef typename call_traits_type::param_type param_type;
-};
-
-#else
-//
-// sorry call_traits is completely non-functional
-// blame your broken compiler:
-//
-
-template <typename T>
-struct call_traits
-{
- typedef T value_type;
- typedef T& reference;
- typedef const T& const_reference;
- typedef const T& param_type;
-};
-
-#endif // member templates
-
-}
-
-#endif // BOOST_OB_CALL_TRAITS_HPP