LeechCraft  0.6.70-10870-g558588d6ec
Modular cross-platform feature rich live environment.
curry.h
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29 
30 #pragma once
31 
32 #include <tuple>
33 #include <type_traits>
34 #include <utility>
35 
36 namespace LeechCraft
37 {
38 namespace Util
39 {
40  template<typename F, typename... PrevArgs>
41  class CurryImpl
42  {
43  const F m_f;
44 
45  const std::tuple<PrevArgs...> m_prevArgs;
46  public:
47  CurryImpl (F f, const std::tuple<PrevArgs...>& prev)
48  : m_f { f }
49  , m_prevArgs { prev }
50  {
51  }
52  private:
53  template<typename T>
54  std::result_of_t<F (PrevArgs..., T)> invoke (const T& arg, int) const
55  {
56  return invokeIndexed (arg, std::index_sequence_for<PrevArgs...> {});
57  }
58 
59  template<typename IF>
60  struct Invoke
61  {
62  template<typename... IArgs>
63  auto operator() (IF fr, IArgs... args)
64  {
65  return fr (args...);
66  }
67  };
68 
69  template<typename R, typename C, typename... Args>
70  struct Invoke<R (C::*) (Args...)>
71  {
72  auto operator() (R (C::*ptr) (Args...), C c, Args... rest)
73  {
74  return (c.*ptr) (rest...);
75  }
76 
77  auto operator() (R (C::*ptr) (Args...), C *c, Args... rest)
78  {
79  return (c->*ptr) (rest...);
80  }
81  };
82 
83  template<typename T, std::size_t... Is>
84  auto invokeIndexed (const T& arg, std::index_sequence<Is...>) const ->
85  decltype (Invoke<F> {} (m_f, std::get<Is> (m_prevArgs)..., arg))
86  {
87  return Invoke<F> {} (m_f, std::get<Is> (m_prevArgs)..., arg);
88  }
89 
90  template<typename T>
91  auto invoke (const T& arg, ...) const -> CurryImpl<F, PrevArgs..., T>
92  {
93  return { m_f, std::tuple_cat (m_prevArgs, std::tuple<T> { arg }) };
94  }
95  public:
96  template<typename T>
97  auto operator() (const T& arg) const -> decltype (invoke (arg, 0))
98  {
99  return invoke (arg, 0);
100  }
101  };
102 
103  template<typename F>
105  {
106  return { f, {} };
107  }
108 }
109 }
constexpr detail::ExprTree< detail::ExprType::LeafStaticPlaceholder, detail::MemberPtrs< Ptr > > f
Definition: oral.h:931
auto operator()(const T &arg) const -> decltype(invoke(arg, 0))
Definition: curry.h:97
CurryImpl< F > Curry(F f)
Definition: curry.h:104
CurryImpl(F f, const std::tuple< PrevArgs... > &prev)
Definition: curry.h:47