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kept old impl for msvc 12.0

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joaquintides
2024-11-08 22:07:10 +01:00
parent c2bc9788ca
commit 28929d9794
1 changed files with 17 additions and 0 deletions
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17
include/boost/mp11/set.hpp
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@ -10,6 +10,7 @@
#include <boost/mp11/utility.hpp>
#include <boost/mp11/function.hpp>
#include <boost/mp11/detail/config.hpp>
#include <boost/mp11/detail/mp_list.hpp>
#include <boost/mp11/detail/mp_append.hpp>
#include <boost/mp11/detail/mp_copy_if.hpp>
@ -95,6 +96,8 @@ template<class S, class... T> using mp_set_push_front = typename detail::mp_set_
namespace detail
{
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
struct mp_is_set_helper_start
{
static constexpr bool value = true;
@ -119,6 +122,20 @@ template<template<class...> class L, class... T> struct mp_is_set_impl<L<T...>>
using type = mp_bool<mp_fold<mp_list<T...>, detail::mp_is_set_helper_start, detail::mp_is_set_helper>::value>;
};
#else
template<class S> struct mp_is_set_impl
{
using type = mp_false;
};
template<template<class...> class L, class... T> struct mp_is_set_impl<L<T...>>
{
using type = mp_to_bool<std::is_same<mp_list<T...>, mp_set_push_back<mp_list<>, T...> > >;
};
#endif // !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
} // namespace detail
template<class S> using mp_is_set = typename detail::mp_is_set_impl<S>::type;