整理

include/boost/container_hash/is_contiguous_range.hpp

@@ -0,0 +1,98 @@
+// Copyright 2017, 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_IS_CONTIGUOUS_RANGE_HPP_INCLUDED
+#define BOOST_HASH_IS_CONTIGUOUS_RANGE_HPP_INCLUDED
+
+#include <boost/container_hash/is_range.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <type_traits>
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1910)
+
+#include <iterator>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template<class It, class T, class S>
+    std::integral_constant< bool, std::is_same<typename std::iterator_traits<It>::value_type, T>::value && std::is_integral<S>::value >
+        is_contiguous_range_check( It first, It last, T const*, T const*, S );
+
+template<class T> decltype( is_contiguous_range_check( std::declval<T const&>().begin(), std::declval<T const&>().end(), std::declval<T const&>().data(), std::declval<T const&>().data() + std::declval<T const&>().size(), std::declval<T const&>().size() ) ) is_contiguous_range_( int );
+template<class T> std::false_type is_contiguous_range_( ... );
+
+template<class T> struct is_contiguous_range: decltype( hash_detail::is_contiguous_range_<T>( 0 ) )
+{
+};
+
+} // namespace hash_detail
+
+namespace container_hash
+{
+
+template<class T> struct is_contiguous_range: std::integral_constant< bool, is_range<T>::value && hash_detail::is_contiguous_range<T>::value >
+{
+};
+
+} // namespace container_hash
+} // namespace boost
+
+#else // !BOOST_WORKAROUND(BOOST_MSVC, < 1910)
+
+#include <cstddef>
+#include <vector>
+#include <string>
+#include <array>
+
+namespace boost
+{
+namespace container_hash
+{
+
+template<class T> struct is_contiguous_range: std::false_type
+{
+};
+
+template<class E, class T, class A> struct is_contiguous_range< std::basic_string<E, T, A> >: std::true_type
+{
+};
+
+template<class E, class T, class A> struct is_contiguous_range< std::basic_string<E, T, A> const >: std::true_type
+{
+};
+
+template<class T, class A> struct is_contiguous_range< std::vector<T, A> >: std::true_type
+{
+};
+
+template<class T, class A> struct is_contiguous_range< std::vector<T, A> const >: std::true_type
+{
+};
+
+template<class A> struct is_contiguous_range< std::vector<bool, A> >: std::false_type
+{
+};
+
+template<class A> struct is_contiguous_range< std::vector<bool, A> const >: std::false_type
+{
+};
+
+template<class T, std::size_t N> struct is_contiguous_range< std::array<T, N> >: std::true_type
+{
+};
+
+template<class T, std::size_t N> struct is_contiguous_range< std::array<T, N> const >: std::true_type
+{
+};
+
+} // namespace container_hash
+} // namespace boost
+
+#endif // !BOOST_WORKAROUND(BOOST_MSVC, < 1910)
+
+#endif // #ifndef BOOST_HASH_IS_CONTIGUOUS_RANGE_HPP_INCLUDED