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 | |
26 | namespace 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(BOOST_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 | |