整理

include/boost/align/detail/integral_constant.hpp

@@ -0,0 +1,53 @@
+/*
+Copyright 2014-2016 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#ifndef BOOST_ALIGN_DETAIL_INTEGRAL_CONSTANT_HPP
+#define BOOST_ALIGN_DETAIL_INTEGRAL_CONSTANT_HPP
+
+#include <boost/config.hpp>
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+#include <type_traits>
+#endif
+
+namespace boost {
+namespace alignment {
+namespace detail {
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+using std::integral_constant;
+using std::true_type;
+using std::false_type;
+#else
+template<class T, T Value>
+struct integral_constant {
+    typedef T value_type;
+    typedef integral_constant type;
+
+    BOOST_CONSTEXPR operator value_type() const BOOST_NOEXCEPT {
+        return Value;
+    }
+
+    BOOST_CONSTEXPR value_type operator()() const BOOST_NOEXCEPT {
+        return Value;
+    }
+
+    BOOST_STATIC_CONSTEXPR T value = Value;
+};
+
+template<class T, T Value>
+BOOST_CONSTEXPR_OR_CONST T integral_constant<T, Value>::value;
+
+typedef integral_constant<bool, true> true_type;
+typedef integral_constant<bool, false> false_type;
+#endif
+
+} /* detail */
+} /* alignment */
+} /* boost */
+
+#endif