LeechCraft  0.6.70-13729-g7046a9d2a7
Modular cross-platform feature rich live environment.
qtutil.h
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29 
30 #pragma once
31 
32 #include "sllconfig.h"
33 
34 namespace LC::Util
35 {
36  namespace detail
37  {
38  template<template<typename, typename> class PairType, typename BaseIt, typename Key, typename Value>
39  struct Iterator
40  {
41  using iterator_category = std::bidirectional_iterator_tag;
42  using difference_type = std::ptrdiff_t;
43 
44  using value_type = PairType<Key, Value>;
46  using pointer = value_type*;
47 
48  BaseIt BaseIt_;
49 
50  bool operator== (const Iterator& other) const { return BaseIt_ == other.BaseIt_; }
51  bool operator!= (const Iterator& other) const { return BaseIt_ != other.BaseIt_; }
52 
53  reference operator* () { return { BaseIt_.key (), BaseIt_.value () }; }
54 
56  {
57  ++BaseIt_;
58  return *this;
59  }
60 
61  Iterator operator++ (int) & { return { BaseIt_++ }; }
62 
64  {
65  --BaseIt_;
66  return *this;
67  }
68 
69  Iterator operator-- (int) & { return { BaseIt_-- }; }
70  };
71 
72  template<typename Iter, typename BaseIter, typename Assoc>
73  struct Range
74  {
75  Assoc Assoc_;
76 
77  BaseIter Begin_ = Assoc_.begin ();
78  BaseIter End_ = Assoc_.end ();
79 
80  auto begin () const { return Iter { Begin_ }; }
81  auto end () const { return Iter { End_ }; }
82  };
83  }
84 
114  template<template<typename K, typename V> class PairType = std::pair, typename Assoc>
115  auto Stlize (Assoc&& assoc)
116  {
117  using BaseIt = decltype (assoc.begin ());
118  using Iterator = detail::Iterator<
119  PairType,
120  BaseIt,
121  decltype (BaseIt {}.key ()),
122  decltype (BaseIt {}.value ())
123  >;
124  return detail::Range<Iterator, BaseIt, Assoc> { std::forward<Assoc> (assoc) };
125  }
126 
127  template<template<typename K, typename V> class PairType = std::pair, typename Assoc>
128  auto StlizeCopy (Assoc&& assoc)
129  {
130  using BaseIt = decltype (assoc.begin ());
131  using Iterator = detail::Iterator<
132  PairType,
133  BaseIt,
134  std::decay_t<decltype (BaseIt {}.key ())>,
135  std::decay_t<decltype (BaseIt {}.value ())>
136  >;
137  return detail::Range<Iterator, BaseIt, Assoc> { std::forward<Assoc> (assoc) };
138  }
139 }
auto Stlize(Assoc &&assoc)
Converts an Qt&#39;s associative sequence assoc to an STL-like iteratable range.
Definition: qtutil.h:115
auto end() const
Definition: qtutil.h:81
bool operator!=(const Iterator &other) const
Definition: qtutil.h:51
Iterator & operator++()
Definition: qtutil.h:55
PairType< Key, Value > value_type
Definition: qtutil.h:44
value_type reference
Definition: qtutil.h:45
auto StlizeCopy(Assoc &&assoc)
Definition: qtutil.h:128
bool operator==(const Iterator &other) const
Definition: qtutil.h:50
auto begin() const
Definition: qtutil.h:80
reference operator*()
Definition: qtutil.h:53
std::bidirectional_iterator_tag iterator_category
Definition: qtutil.h:41
Iterator & operator--()
Definition: qtutil.h:63
std::ptrdiff_t difference_type
Definition: qtutil.h:42
value_type * pointer
Definition: qtutil.h:46