LeechCraft  0.6.70-13729-g7046a9d2a7
Modular cross-platform feature rich live environment.
curry.h
Go to the documentation of this file.
1 /**********************************************************************
2  * LeechCraft - modular cross-platform feature rich internet client.
3  * Copyright (C) 2006-2014 Georg Rudoy
4  *
5  * Boost Software License - Version 1.0 - August 17th, 2003
6  *
7  * Permission is hereby granted, free of charge, to any person or organization
8  * obtaining a copy of the software and accompanying documentation covered by
9  * this license (the "Software") to use, reproduce, display, distribute,
10  * execute, and transmit the Software, and to prepare derivative works of the
11  * Software, and to permit third-parties to whom the Software is furnished to
12  * do so, all subject to the following:
13  *
14  * The copyright notices in the Software and this entire statement, including
15  * the above license grant, this restriction and the following disclaimer,
16  * must be included in all copies of the Software, in whole or in part, and
17  * all derivative works of the Software, unless such copies or derivative
18  * works are solely in the form of machine-executable object code generated by
19  * a source language processor.
20  *
21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23  * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
24  * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
25  * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
26  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27  * DEALINGS IN THE SOFTWARE.
28  **********************************************************************/
29 
30 #pragma once
31 
32 #include <tuple>
33 #include <type_traits>
34 #include <utility>
35 
36 namespace LC
37 {
38 namespace Util
39 {
40  template<typename F, typename... PrevArgs>
41  class CurryImpl
42  {
43  F m_f;
44 
45  std::tuple<PrevArgs...> m_prevArgs;
46  public:
47  template<typename CF, typename CT>
48  CurryImpl (CF&& f, CT&& prev)
49  : m_f { std::forward<CF> (f) }
50  , m_prevArgs { std::forward<CT> (prev) }
51  {
52  }
53 
54  template<typename T>
55  auto operator() (T&& arg) const &
56  {
57  return run (*this, std::forward<T> (arg));
58  }
59 
60  template<typename T>
61  auto operator() (T&& arg) &
62  {
63  return run (std::as_const (*this), std::forward<T> (arg));
64  }
65 
66  template<typename T>
67  auto operator() (T&& arg) &&
68  {
69  return run (std::move (*this), std::forward<T> (arg));
70  }
71  private:
72  template<typename This, typename T>
73  static auto run (This&& refThis, T&& arg)
74  {
75  if constexpr (std::is_invocable_v<F, PrevArgs..., T>)
76  {
77  auto wrapper = [&refThis, &arg] (auto&&... args)
78  {
79  return std::invoke (std::move (refThis.m_f), std::forward<decltype (args)> (args)..., std::forward<T> (arg));
80  };
81  return std::apply (std::move (wrapper), std::move (refThis.m_prevArgs));
82  }
83  else
84  return CurryImpl<F, PrevArgs..., T>
85  {
86  std::move (refThis.m_f),
87  std::tuple_cat (std::move (refThis.m_prevArgs), std::forward_as_tuple (std::forward<T> (arg)))
88  };
89  }
90  };
91 
92  template<typename F, typename... Args>
93  CurryImpl<std::decay_t<F>, Args...> Curry (F&& f, Args&&... args)
94  {
95  return { std::forward<F> (f), std::forward_as_tuple (std::forward<Args> (args)...) };
96  }
97 }
98 }
CurryImpl< std::decay_t< F >, Args... > Curry(F &&f, Args &&... args)
Definition: curry.h:93
constexpr detail::ExprTree< detail::ExprType::LeafStaticPlaceholder, detail::MemberPtrs< Ptr > > f
Definition: oral.h:955
CurryImpl(CF &&f, CT &&prev)
Definition: curry.h:48
auto operator()(T &&arg) const &
Definition: curry.h:55
Definition: constants.h:35