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_NOTHROW_CONSTRUCTOR_HPP_INCLUDED
10#define BOOST_TT_HAS_NOTHROW_CONSTRUCTOR_HPP_INCLUDED
11
12#include <boost/type_traits/intrinsics.hpp>
13#include <boost/type_traits/integral_constant.hpp>
14
15#ifdef BOOST_HAS_NOTHROW_CONSTRUCTOR
16
17#if defined(BOOST_MSVC) || defined(BOOST_INTEL)
18#include <boost/type_traits/has_trivial_constructor.hpp>
19#endif
20#if defined(__GNUC__ ) || defined(__SUNPRO_CC)
21#include <boost/type_traits/is_default_constructible.hpp>
22#endif
23
24namespace boost {
25
26template <class T> struct has_nothrow_constructor : public integral_constant<bool, BOOST_HAS_NOTHROW_CONSTRUCTOR(T)>{};
27
28#elif !defined(BOOST_NO_CXX11_NOEXCEPT)
29
30#include <boost/type_traits/is_default_constructible.hpp>
31#include <boost/type_traits/remove_all_extents.hpp>
32
33#ifdef BOOST_MSVC
34#pragma warning(push)
35#pragma warning(disable:4197) // top-level volatile in cast is ignored
36#endif
37
38namespace boost { namespace detail{
39
40 template <class T, bool b> struct has_nothrow_constructor_imp : public boost::integral_constant<bool, false>{};
41 template <class T> struct has_nothrow_constructor_imp<T, true> : public boost::integral_constant<bool, noexcept(T())>{};
42 template <class T, std::size_t N> struct has_nothrow_constructor_imp<T[N], true> : public has_nothrow_constructor_imp<T, true> {};
43}
44
45template <class T> struct has_nothrow_constructor : public detail::has_nothrow_constructor_imp<T, is_default_constructible<T>::value>{};
46
47#ifdef BOOST_MSVC
48#pragma warning(pop)
49#endif
50
51#else
52
53#include <boost/type_traits/has_trivial_constructor.hpp>
54
55namespace boost {
56
57template <class T> struct has_nothrow_constructor : public ::boost::has_trivial_constructor<T> {};
58
59#endif
60
61template<> struct has_nothrow_constructor<void> : public false_type {};
62#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
63template<> struct has_nothrow_constructor<void const> : public false_type{};
64template<> struct has_nothrow_constructor<void const volatile> : public false_type{};
65template<> struct has_nothrow_constructor<void volatile> : public false_type{};
66#endif
67
68template <class T> struct has_nothrow_default_constructor : public has_nothrow_constructor<T>{};
69
70} // namespace boost
71
72#endif // BOOST_TT_HAS_NOTHROW_CONSTRUCTOR_HPP_INCLUDED
73