add boost on mac

macx64/include/boost/hof/construct.hpp

@@ -0,0 +1,302 @@
+/*=============================================================================
+    Copyright (c) 2015 Paul Fultz II
+    construct.h
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+==============================================================================*/
+
+#ifndef BOOST_HOF_GUARD_CONSTRUCT_H
+#define BOOST_HOF_GUARD_CONSTRUCT_H
+
+/// construct
+/// =========
+/// 
+/// Description
+/// -----------
+/// 
+/// The `construct` function returns a function object that will construct the
+/// object when the called. A template can also be given, which it will deduce
+/// the parameters to the template. The `construct_meta` can be used to
+/// construct the object from a metafunction.
+/// 
+/// Synopsis
+/// --------
+/// 
+///     // Construct by decaying each value
+///     template<class T>
+///     constexpr auto construct();
+/// 
+///     template<template<class...> class Template>
+///     constexpr auto construct();
+/// 
+///     // Construct by deducing lvalues by reference and rvalue reference by reference
+///     template<class T>
+///     constexpr auto construct_forward();
+/// 
+///     template<template<class...> class Template>
+///     constexpr auto construct_forward();
+/// 
+///     // Construct by deducing lvalues by reference and rvalues by value.
+///     template<class T>
+///     constexpr auto construct_basic();
+/// 
+///     template<template<class...> class Template>
+///     constexpr auto construct_basic();
+/// 
+///     // Construct by deducing the object from a metafunction
+///     template<class MetafunctionClass>
+///     constexpr auto construct_meta();
+/// 
+///     template<template<class...> class MetafunctionTemplate>
+///     constexpr auto construct_meta();
+/// 
+/// Semantics
+/// ---------
+/// 
+///     assert(construct<T>()(xs...) == T(xs...));
+///     assert(construct<Template>()(xs...) == Template<decltype(xs)...>(xs...));
+///     assert(construct_meta<MetafunctionClass>()(xs...) == MetafunctionClass::apply<decltype(xs)...>(xs...));
+///     assert(construct_meta<MetafunctionTemplate>()(xs...) == MetafunctionTemplate<decltype(xs)...>::type(xs...));
+/// 
+/// Requirements
+/// ------------
+/// 
+/// MetafunctionClass must be a:
+/// 
+/// * [MetafunctionClass](MetafunctionClass)
+/// 
+/// MetafunctionTemplate<Ts...> must be a:
+/// 
+/// * [Metafunction](Metafunction)
+/// 
+/// T, Template<Ts..>, MetafunctionClass::apply<Ts...>, and
+/// MetafunctionTemplate<Ts...>::type must be:
+/// 
+/// * MoveConstructible
+/// 
+/// Example
+/// -------
+/// 
+///     #include <boost/hof.hpp>
+///     #include <cassert>
+///     #include <vector>
+/// 
+///     int main() {
+///         auto v = boost::hof::construct<std::vector<int>>()(5, 5);
+///         assert(v.size() == 5);
+///     }
+/// 
+
+#include <boost/hof/detail/forward.hpp>
+#include <boost/hof/detail/move.hpp>
+#include <boost/hof/detail/delegate.hpp>
+#include <boost/hof/detail/join.hpp>
+#include <boost/hof/detail/remove_rvalue_reference.hpp>
+#include <boost/hof/decay.hpp>
+
+#include <initializer_list>
+
+namespace boost { namespace hof { 
+
+namespace detail {
+
+template<class T, class=void>
+struct construct_f
+{
+    typedef typename std::aligned_storage<sizeof(T)>::type storage;
+
+    struct storage_holder
+    {
+        storage * s;
+        storage_holder(storage* x) noexcept : s(x)
+        {}
+
+        T& data() noexcept
+        {
+            return *reinterpret_cast<T*>(s);
+        }
+
+        ~storage_holder() noexcept(noexcept(std::declval<T>().~T()))
+        {
+            this->data().~T();
+        }
+    };
+
+    constexpr construct_f() noexcept
+    {}
+    template<class... Ts, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, Ts...)>
+    T operator()(Ts&&... xs) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(T, Ts&&...)
+    {
+        storage buffer{};
+        new(&buffer) T(BOOST_HOF_FORWARD(Ts)(xs)...);
+        storage_holder h(&buffer);
+        return boost::hof::move(h.data());
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, std::initializer_list<X>&&)>
+    T operator()(std::initializer_list<X>&& x) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(T, std::initializer_list<X>&&)
+    {
+        storage buffer{};
+        new(&buffer) T(static_cast<std::initializer_list<X>&&>(x));
+        storage_holder h(&buffer);
+        return h.data();
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, std::initializer_list<X>&)>
+    T operator()(std::initializer_list<X>& x) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(T, std::initializer_list<X>&)
+    {
+        storage buffer{};
+        new(&buffer) T(x);
+        storage_holder h(&buffer);
+        return h.data();
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, const std::initializer_list<X>&)>
+    T operator()(const std::initializer_list<X>& x) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(T, const std::initializer_list<X>&)
+    {
+        storage buffer{};
+        new(&buffer) T(x);
+        storage_holder h(&buffer);
+        return h.data();
+    }
+};
+
+template<class T>
+struct construct_f<T, typename std::enable_if<BOOST_HOF_IS_LITERAL(T)>::type>
+{
+    constexpr construct_f() noexcept
+    {}
+    template<class... Ts, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, Ts...)>
+    constexpr T operator()(Ts&&... xs) const noexcept
+    {
+        return T(BOOST_HOF_FORWARD(Ts)(xs)...);
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, std::initializer_list<X>&&)>
+    constexpr T operator()(std::initializer_list<X>&& x) const noexcept
+    {
+        return T(static_cast<std::initializer_list<X>&&>(x));
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, std::initializer_list<X>&)>
+    constexpr T operator()(std::initializer_list<X>& x) const noexcept
+    {
+        return T(x);
+    }
+
+    template<class X, BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(T, const std::initializer_list<X>&)>
+    constexpr T operator()(const std::initializer_list<X>& x) const noexcept
+    {
+        return T(x);
+    }
+};
+
+template<template<class...> class Template, template<class...> class D>
+struct construct_template_f
+{
+    constexpr construct_template_f() noexcept
+    {}
+    template<class... Ts, class Result=BOOST_HOF_JOIN(Template, typename D<Ts>::type...), 
+        BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(Result, Ts...)>
+    constexpr Result operator()(Ts&&... xs) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(Result, Ts&&...)
+    {
+        return construct_f<Result>()(BOOST_HOF_FORWARD(Ts)(xs)...);
+    }
+};
+
+template<class MetafunctionClass>
+struct construct_meta_f
+{
+    constexpr construct_meta_f() noexcept
+    {}
+
+    template<class... Ts>
+    struct apply
+    : MetafunctionClass::template apply<Ts...>
+    {};
+
+    template<class... Ts, 
+        class Metafunction=BOOST_HOF_JOIN(apply, Ts...), 
+        class Result=typename Metafunction::type, 
+        BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(Result, Ts...)>
+    constexpr Result operator()(Ts&&... xs) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(Result, Ts&&...)
+    {
+        return construct_f<Result>()(BOOST_HOF_FORWARD(Ts)(xs)...);
+    }
+};
+
+template<template<class...> class MetafunctionTemplate>
+struct construct_meta_template_f
+{
+    constexpr construct_meta_template_f() noexcept
+    {}
+    template<class... Ts, 
+        class Metafunction=BOOST_HOF_JOIN(MetafunctionTemplate, Ts...), 
+        class Result=typename Metafunction::type, 
+        BOOST_HOF_ENABLE_IF_CONSTRUCTIBLE(Result, Ts...)>
+    constexpr Result operator()(Ts&&... xs) const BOOST_HOF_NOEXCEPT_CONSTRUCTIBLE(Result, Ts&&...)
+    {
+        return construct_f<Result>()(BOOST_HOF_FORWARD(Ts)(xs)...);
+    }
+};
+
+
+template<class T>
+struct construct_id
+{
+    typedef T type;
+};
+
+}
+
+template<class T>
+constexpr detail::construct_f<T> construct() noexcept
+{
+    return {};
+}
+// These overloads are provide for consistency
+template<class T>
+constexpr detail::construct_f<T> construct_forward() noexcept
+{
+    return {};
+}
+
+template<class T>
+constexpr detail::construct_f<T> construct_basic() noexcept
+{
+    return {};
+}
+
+template<template<class...> class Template>
+constexpr detail::construct_template_f<Template, detail::decay_mf> construct() noexcept
+{
+    return {};
+}
+
+template<template<class...> class Template>
+constexpr detail::construct_template_f<Template, detail::construct_id> construct_forward() noexcept
+{
+    return {};
+}
+
+template<template<class...> class Template>
+constexpr detail::construct_template_f<Template, detail::remove_rvalue_reference> construct_basic() noexcept
+{
+    return {};
+}
+
+template<class T>
+constexpr detail::construct_meta_f<T> construct_meta() noexcept
+{
+    return {};
+}
+
+template<template<class...> class Template>
+constexpr detail::construct_meta_template_f<Template> construct_meta() noexcept
+{
+    return {};
+}
+
+}} // namespace boost::hof
+
+#endif