111 lines · cpp
1// RUN: %check_clang_tidy -std=c++14-or-later %s modernize-use-transparent-functors %t2 3namespace std {4template<class T>5struct remove_reference;6 7template <class T>8constexpr T &&forward(typename std::remove_reference<T>::type &t);9 10template <class T>11constexpr T &&forward(typename std::remove_reference<T>::type &&t);12 13template <typename T = void>14struct plus {15 constexpr T operator()(const T &Lhs, const T &Rhs) const;16};17 18template <>19struct plus<void> {20 template <typename T, typename U>21 constexpr auto operator()(T &&Lhs, U &&Rhs) const ->22 decltype(forward<T>(Lhs) + forward<U>(Rhs));23};24 25template <typename T = void>26struct less {27 constexpr bool operator()(const T &Lhs, const T &Rhs) const;28};29 30template <>31struct less<void> {32 template <typename T, typename U>33 constexpr bool operator()(T &&Lhs, U &&Rhs) const;34};35 36template <typename T = void>37struct logical_not {38 constexpr bool operator()(const T &Arg) const;39};40 41template <>42struct logical_not<void> {43 template <typename T>44 constexpr bool operator()(T &&Arg) const;45};46 47template <typename T>48class allocator;49 50template <51 class Key,52 class Compare = std::less<>,53 class Allocator = std::allocator<Key>>54class set {};55 56template <57 class Key,58 class Compare = std::less<Key>,59 class Allocator = std::allocator<Key>>60class set2 {};61 62template <class InputIt, class UnaryPredicate>63InputIt find_if(InputIt first, InputIt last,64 UnaryPredicate p);65 66template <class RandomIt, class Compare>67void sort(RandomIt first, RandomIt last, Compare comp);68 69class iterator {};70class string {};71}72 73int main() {74 using std::set;75 using std::less;76 std::set<int, std::less<int>> s;77 // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: prefer transparent functors 'less<>' [modernize-use-transparent-functors]78 // CHECK-FIXES: std::set<int, std::less<>> s;79 set<int, std::less<int>> s2;80 // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: prefer transparent functors81 // CHECK-FIXES: set<int, std::less<>> s2;82 set<int, less<int>> s3;83 // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: prefer transparent functors84 // CHECK-FIXES: set<int, less<>> s3;85 std::set<int, std::less<>> s4;86 std::set<char *, std::less<std::string>> s5;87 std::set<set<int, less<int>>, std::less<>> s6;88 // CHECK-MESSAGES: :[[@LINE-1]]:21: warning: prefer transparent functors89 // CHECK-FIXES: std::set<set<int, less<>>, std::less<>> s6;90 std::iterator begin, end;91 sort(begin, end, std::less<int>());92 // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: prefer transparent functors93 std::sort(begin, end, std::less<>());94 find_if(begin, end, std::logical_not<bool>());95 // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: prefer transparent functors96 std::find_if(begin, end, std::logical_not<>());97 using my_set = std::set<int, std::less<int>>;98 // CHECK-MESSAGES: :[[@LINE-1]]:32: warning: prefer transparent functors99 // CHECK-FIXES: using my_set = std::set<int, std::less<>>;100 using my_set2 = std::set<char*, std::less<std::string>>;101 using my_less = std::less<std::string>;102 find_if(begin, end, my_less());103 // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: prefer transparent functors104 std::set2<int> control;105}106 107struct ImplicitTypeLoc : std::set2<std::less<int>> {108 // CHECK-MESSAGES: :[[@LINE-1]]:36: warning: prefer transparent functors109 ImplicitTypeLoc() {}110};111