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Add support for value lists to mp_assign, mp_clear. Refs #53.

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Peter Dimov
2023-05-15 14:34:06 +03:00
parent bfa1bad608
commit 481755ce7c
4 changed files with 148 additions and 3 deletions
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24
include/boost/mp11/list.hpp
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@@ -69,13 +69,35 @@ template<class L> using mp_empty = mp_bool< mp_size<L>::value == 0 >;
namespace detail
{
template<class L1, class L2> struct mp_assign_impl;
template<class L1, class L2> struct mp_assign_impl
{
// An error "no type named 'type'" here means that the arguments to mp_assign aren't lists
};
template<template<class...> class L1, class... T, template<class...> class L2, class... U> struct mp_assign_impl<L1<T...>, L2<U...>>
{
using type = L1<U...>;
};
#if defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
template<template<auto...> class L1, auto... A, template<class...> class L2, class... U> struct mp_assign_impl<L1<A...>, L2<U...>>
{
using type = L1<U::value...>;
};
template<template<class...> class L1, class... T, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<T...>, L2<B...>>
{
using type = L1<mp_value<B>...>;
};
template<template<auto...> class L1, auto... A, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<A...>, L2<B...>>
{
using type = L1<B...>;
};
#endif
} // namespace detail
template<class L1, class L2> using mp_assign = typename detail::mp_assign_impl<L1, L2>::type;