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

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

include/mp/metafunction/apply.h

@@ -0,0 +1,26 @@
+/* Ehis 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 apply_impl;
+
+template<template<class...> class F, template<class...> class LT, class... Es>
+struct apply_impl<F, LT<Es...>> {
+    using type = F<Es...>;
+};
+
+} // namespace detail
+
+/// Invokes metafunction F where the arguments are all the members of list L
+template<template<class...> class F, class L>
+using apply = typename detail::apply_impl<F, L>::type;
+
+} // namespace mp

include/mp/metafunction/bind.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 {
+
+/// Binds the first sizeof...(A) arguments of metafunction F with arguments A
+template<template<class...> class F, class... As>
+struct bind {
+    template<class... Rs>
+    using type = F<As..., Rs...>;
+};
+
+} // namespace mp
+
+#define MM_MP_BIND(...) ::mp::bind<__VA_ARGS__>::template type

include/mp/metafunction/identity.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<class T>
+struct identity_impl {
+    using type = T;
+};
+
+} // namespace detail
+
+/// Identity metafunction
+template<class T>
+using identity = typename identity_impl<T>::type;
+
+} // namespace mp

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