1
2// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes,
3// Howard Hinnant and John Maddock 2000.
4// (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
5
6// Use, modification and distribution are subject to the Boost Software License,
7// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt).
9//
10// See http://www.boost.org/libs/type_traits for most recent version including documentation.
11
12// Fixed is_pointer, is_reference, is_const, is_volatile, is_same,
13// is_member_pointer based on the Simulated Partial Specialization work
14// of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or
15// http://groups.yahoo.com/group/boost/message/5441
16// Some workarounds in here use ideas suggested from "Generic<Programming>:
17// Mappings between Types and Values"
18// by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
19
20
21#ifndef BOOST_TT_IS_SAME_HPP_INCLUDED
22#define BOOST_TT_IS_SAME_HPP_INCLUDED
23
24#include <boost/type_traits/integral_constant.hpp>
25
26namespace boost {
27
28
29 template <class T, class U> struct is_same : public false_type {};
30 template <class T> struct is_same<T,T> : public true_type {};
31#if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
32// without this, Borland's compiler gives the wrong answer for
33// references to arrays:
34 template <class T> struct is_same<T&, T&> : public true_type{};
35#endif
36
37
38} // namespace boost
39
40#endif // BOOST_TT_IS_SAME_HPP_INCLUDED
41
42