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Add mp_replace_if_q

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Peter Dimov
2017-10-21 21:51:14 +03:00
parent 4a8d6db171
commit e4c12368c6
4 changed files with 73 additions and 0 deletions
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6
include/boost/mp11/algorithm.hpp
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@@ -378,13 +378,19 @@ template<class L, template<class...> class P, class W> struct mp_replace_if_impl
template<template<class...> class L, class... T, template<class...> class P, class W> struct mp_replace_if_impl<L<T...>, P, W>
{
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, < 1920 )
template<class U> struct _f { using type = mp_if<P<U>, W, U>; };
using type = L<typename _f<T>::type...>;
#else
template<class U> using _f = mp_if<P<U>, W, U>;
using type = L<_f<T>...>;
#endif
};
} // namespace detail
template<class L, template<class...> class P, class W> using mp_replace_if = typename detail::mp_replace_if_impl<L, P, W>::type;
template<class L, class Q, class W> using mp_replace_if_q = mp_replace_if<L, Q::template fn, W>;
// mp_copy_if<L, P>
namespace detail