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Use narrowing instead of static_assert in mp_take

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This commit is contained in:
Peter Dimov
2017-03-24 19:12:13 +02:00
parent c059b1ea3f
commit 3242fdb134
1 changed files with 1 additions and 7 deletions
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8
include/boost/mp11/algorithm.hpp
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@@ -315,16 +315,10 @@ template<template<class...> class L, class T1, class T2, class T3, class T4, cla
using type = mp_append<L<T1, T2, T3, T4, T5>, typename mp_take_c_impl<L<T...>, N-5>::type>;
};
template<class L, class N> struct mp_take_impl
{
static_assert( N::value >= 0, "mp_take<L, N>: N must not be negative" );
using type = typename mp_take_c_impl<L, N::value>::type;
};
} // namespace detail
template<class L, std::size_t N> using mp_take_c = typename detail::mp_take_c_impl<L, N>::type;
template<class L, class N> using mp_take = typename detail::mp_take_impl<L, N>::type;
template<class L, class N> using mp_take = typename detail::mp_take_c_impl<L, std::size_t{ N::value }>::type;
// mp_replace<L, V, W>
namespace detail