liuxiaolong
2021-07-20 58d904a328c0d849769b483e901a0be9426b8209
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//          Copyright Oliver Kowalke 2014.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)
 
#ifndef BOOST_CONTEXT_DETAIL_DISABLE_OVERLOAD_H
#define BOOST_CONTEXT_DETAIL_DISABLE_OVERLOAD_H
 
#include <type_traits>
 
#include <boost/config.hpp>
 
#include <boost/context/detail/config.hpp>
 
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
 
namespace boost {
namespace context {
namespace detail {
 
// http://ericniebler.com/2013/08/07/universal-references-and-the-copy-constructo/
template< typename X, typename Y >
using disable_overload =
    typename std::enable_if<
        ! std::is_base_of<
            X,
            typename std::decay< Y >::type
        >::value
    >::type;
 
}}}
 
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_SUFFIX
#endif
 
#endif // BOOST_CONTEXT_DETAIL_DISABLE_OVERLOAD_H