File indexing completed on 2024-05-12 15:57:04 

0001 /*
0002  *  SPDX-FileCopyrightText: 2016 Dmitry Kazakov <dimula73@gmail.com>
0003  *
0004  *  SPDX-License-Identifier: GPL-2.0-or-later
0005  */
0006 
0007 #ifndef KRITA_CONTAINER_UTILS_H
0008 #define KRITA_CONTAINER_UTILS_H
0009 
0010 #include <functional>
0011 #include <QList>
0012 
0013 namespace KritaUtils
0014 {
0015 
0016 template <class T>
0017     bool compareListsUnordered(const QList<T> &a, const QList<T> &b) {
0018     if (a.size() != b.size()) return false;
0019 
0020     Q_FOREACH(const T &t, a) {
0021         if (!b.contains(t)) return false;
0022     }
0023 
0024     return true;
0025 }
0026 
0027 template <class C>
0028     void makeContainerUnique(C &container) {
0029     std::sort(container.begin(), container.end());
0030     auto newEnd = std::unique(container.begin(), container.end());
0031 
0032     while (newEnd != container.end()) {
0033         newEnd = container.erase(newEnd);
0034     }
0035 }
0036 
0037 
0038 template <class C, typename KeepIfFunction>
0039     auto filterContainer(C &container, KeepIfFunction keepIf)
0040         -> decltype(bool(keepIf(container[0])), void()) {
0041 
0042         auto newEnd = std::remove_if(container.begin(), container.end(), [keepIf] (typename C::reference p) { return !keepIf(p); });
0043         while (newEnd != container.end()) {
0044            newEnd = container.erase(newEnd);
0045         }
0046 }
0047 
0048 template<typename T>
0049 struct is_container
0050 {
0051     typedef typename std::remove_const<T>::type test_type;
0052 
0053     template<typename A>
0054     static constexpr bool test(
0055             A *pointer,
0056             A const *const_pointer = nullptr,
0057             decltype(pointer->begin()) * = nullptr,
0058             decltype(pointer->end()) * = nullptr,
0059             decltype(const_pointer->begin()) * = nullptr,
0060             decltype(const_pointer->end()) * = nullptr,
0061             typename A::iterator * it = nullptr,
0062             typename A::const_iterator * constIt = nullptr,
0063             typename A::value_type * = nullptr) {
0064 
0065         typedef typename A::iterator iterator;
0066         typedef typename A::const_iterator const_iterator;
0067         typedef typename A::value_type value_type;
0068         return  std::is_same<decltype(pointer->begin()),iterator>::value &&
0069                 std::is_same<decltype(pointer->end()),iterator>::value &&
0070                 std::is_same<decltype(const_pointer->begin()),const_iterator>::value &&
0071                 std::is_same<decltype(const_pointer->end()),const_iterator>::value &&
0072                 std::is_same<decltype(**it),value_type &>::value &&
0073                 std::is_same<decltype(**constIt),value_type const &>::value;
0074 
0075     }
0076 
0077     template<typename A>
0078     static constexpr bool test(...) {
0079         return false;
0080     }
0081 
0082     static const bool value = test<test_type>(nullptr);
0083 };
0084 
0085 template<typename T>
0086 struct is_appendable_container
0087 {
0088     typedef typename std::remove_const<T>::type test_type;
0089 
0090     template<typename A, typename R = decltype(std::declval<A&>().push_back(std::declval<typename A::value_type>()))>
0091         static constexpr bool test(A */*pointer*/) {
0092             return  is_container<A>::value && std::is_same<R, void>::value;
0093         }
0094 
0095     template<typename A>
0096     static constexpr bool test(...) {
0097         return false;
0098     }
0099 
0100     static const bool value = test<test_type>(nullptr);
0101 };
0102 
0103 }
0104 
0105 
0106 #endif // KRITA_CONTAINER_UTILS_H
0107