Squashed 'externals/mp/' content from commit 29cb5588d

git-subtree-dir: externals/mp
git-subtree-split: 29cb5588da3a18ed571a0e41622900a01b9f01eb

include/mp/metafunction/map.h

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+/* This file is part of the mp project.
+ * Copyright (c) 2017 MerryMage
+ * SPDX-License-Identifier: 0BSD
+ */
+
+#pragma once
+
+namespace mp {
+
+namespace detail {
+
+template<template<class...> class F, class L>
+struct map_impl;
+
+template<template<class...> class F, template<class...> class LT, class... Es>
+struct map_impl<F, LT<Es...>> {
+    using type = LT<F<Es>...>;
+};
+
+} // namespace detail
+
+/// Applies each element of list L to metafunction F
+template<template<class...> class F, class L>
+using map = typename detail::map_impl<F, L>::type;
+
+} // namespace mp