/Src/Dependencies/Boost/boost/interprocess/detail/type_traits.hpp
http://hadesmem.googlecode.com/ · C++ Header · 166 lines · 120 code · 30 blank · 16 comment · 2 complexity · 1a3e2e5e9107bcbac90b319c1bb41483 MD5 · raw file
- //////////////////////////////////////////////////////////////////////////////
- // (C) Copyright John Maddock 2000.
- // (C) Copyright Ion Gaztanaga 2005-2009.
- //
- // 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)
- //
- // See http://www.boost.org/libs/interprocess for documentation.
- //
- // The alignment_of implementation comes from John Maddock's boost::alignment_of code
- //
- //////////////////////////////////////////////////////////////////////////////
- #ifndef BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP
- #define BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP
- #if (defined _MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif
- #include <boost/interprocess/detail/config_begin.hpp>
- namespace boost {
- namespace interprocess {
- namespace detail {
- struct nat{};
- //boost::alignment_of yields to 10K lines of preprocessed code, so we
- //need an alternative
- template <typename T> struct alignment_of;
- template <typename T>
- struct alignment_of_hack
- {
- char c;
- T t;
- alignment_of_hack();
- };
- template <unsigned A, unsigned S>
- struct alignment_logic
- {
- enum{ value = A < S ? A : S };
- };
- template< typename T >
- struct alignment_of
- {
- enum{ value = alignment_logic
- < sizeof(alignment_of_hack<T>) - sizeof(T)
- , sizeof(T)>::value };
- };
- //This is not standard, but should work with all compilers
- union max_align
- {
- char char_;
- short short_;
- int int_;
- long long_;
- #ifdef BOOST_HAS_LONG_LONG
- long long long_long_;
- #endif
- float float_;
- double double_;
- long double long_double_;
- void * void_ptr_;
- };
- template<class T>
- struct remove_reference
- {
- typedef T type;
- };
- template<class T>
- struct remove_reference<T&>
- {
- typedef T type;
- };
- template<class T>
- struct is_reference
- {
- enum { value = false };
- };
- template<class T>
- struct is_reference<T&>
- {
- enum { value = true };
- };
- template<class T>
- struct is_pointer
- {
- enum { value = false };
- };
- template<class T>
- struct is_pointer<T*>
- {
- enum { value = true };
- };
- template <typename T>
- struct add_reference
- {
- typedef T& type;
- };
- template<class T>
- struct add_reference<T&>
- {
- typedef T& type;
- };
- template<>
- struct add_reference<void>
- {
- typedef nat &type;
- };
- template<>
- struct add_reference<const void>
- {
- typedef const nat &type;
- };
- template <class T>
- struct add_const_reference
- { typedef const T &type; };
- template <class T>
- struct add_const_reference<T&>
- { typedef T& type; };
- template <typename T, typename U>
- struct is_same
- {
- typedef char yes_type;
- struct no_type
- {
- char padding[8];
- };
- template <typename V>
- static yes_type is_same_tester(V*, V*);
- static no_type is_same_tester(...);
- static T *t;
- static U *u;
- static const bool value = sizeof(yes_type) == sizeof(is_same_tester(t,u));
- };
- } // namespace detail
- } //namespace interprocess {
- } //namespace boost {
- #endif //#ifndef BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP
- #include <boost/interprocess/detail/config_end.hpp>