1 | |
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2 | // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
3 | // Use, modification and distribution are subject to the Boost Software License, |
4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
5 | // http://www.boost.org/LICENSE_1_0.txt). |
6 | // |
7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
8 | |
9 | #ifndef BOOST_TT_HAS_TRIVIAL_CONSTRUCTOR_HPP_INCLUDED |
10 | #define BOOST_TT_HAS_TRIVIAL_CONSTRUCTOR_HPP_INCLUDED |
11 | |
12 | #include <boost/type_traits/intrinsics.hpp> |
13 | #include <boost/type_traits/is_pod.hpp> |
14 | #include <boost/type_traits/is_default_constructible.hpp> |
15 | |
16 | #ifdef BOOST_HAS_TRIVIAL_CONSTRUCTOR |
17 | #ifdef BOOST_HAS_SGI_TYPE_TRAITS |
18 | #include <boost/type_traits/is_same.hpp> |
19 | #elif defined(__GNUC__) || defined(__SUNPRO_CC) |
20 | #include <boost/type_traits/is_volatile.hpp> |
21 | #ifdef BOOST_INTEL |
22 | #include <boost/type_traits/is_pod.hpp> |
23 | #endif |
24 | #endif |
25 | #endif |
26 | |
27 | |
28 | #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_CONSTRUCTOR)) |
29 | #include <boost/type_traits/is_default_constructible.hpp> |
30 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_default_constructible<T>::value |
31 | #else |
32 | // |
33 | // Mot all compilers, particularly older GCC versions can handle the fix above. |
34 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
35 | #endif |
36 | |
37 | namespace boost { |
38 | |
39 | template <typename T> struct has_trivial_constructor |
40 | #ifdef BOOST_HAS_TRIVIAL_CONSTRUCTOR |
41 | : public integral_constant <bool, ((::boost::is_pod<T>::value || BOOST_HAS_TRIVIAL_CONSTRUCTOR(T)) BOOST_TT_TRIVIAL_CONSTRUCT_FIX)>{}; |
42 | #else |
43 | : public integral_constant <bool, ::boost::is_pod<T>::value>{}; |
44 | #endif |
45 | |
46 | template <> struct has_trivial_constructor<void> : public boost::false_type{}; |
47 | template <> struct has_trivial_constructor<void const> : public boost::false_type{}; |
48 | template <> struct has_trivial_constructor<void const volatile> : public boost::false_type{}; |
49 | template <> struct has_trivial_constructor<void volatile> : public boost::false_type{}; |
50 | |
51 | template <class T> struct has_trivial_default_constructor : public has_trivial_constructor<T> {}; |
52 | |
53 | #undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
54 | |
55 | } // namespace boost |
56 | |
57 | #endif // BOOST_TT_HAS_TRIVIAL_CONSTRUCTOR_HPP_INCLUDED |
58 |