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1 | |
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 |