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41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
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// (C) Copyright John Maddock 2018.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_MATH_TOOLS_IS_CONST_ITERABLE_HPP
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#define BOOST_MATH_TOOLS_IS_CONST_ITERABLE_HPP
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#if !defined(BOOST_NO_CXX14_VARIABLE_TEMPLATES) && !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_SFINAE_EXPR)
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#define BOOST_MATH_HAS_IS_CONST_ITERABLE
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#include <boost/type_traits/is_detected.hpp>
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#include <utility>
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namespace boost {
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namespace math {
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namespace tools {
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namespace detail {
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template<class T>
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using begin_t = decltype(std::declval<const T&>().begin());
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template<class T>
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using end_t = decltype(std::declval<const T&>().end());
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template<class T>
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using const_iterator_t = typename T::const_iterator;
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template <class T>
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struct is_const_iterable
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: public boost::integral_constant<bool,
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boost::is_detected<begin_t, T>::value
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&& boost::is_detected<end_t, T>::value
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&& boost::is_detected<const_iterator_t, T>::value
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> {};
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} } } }
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#endif
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#endif // BOOST_MATH_TOOLS_IS_CONST_ITERABLE_HPP
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