| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef TEST_SUPPORT_COUNTING_PREDICATES_H |
| #define TEST_SUPPORT_COUNTING_PREDICATES_H |
| |
| #include <cstddef> |
| #include <utility> |
| #include "test_macros.h" |
| |
| template <typename Predicate, typename Arg> |
| struct unary_counting_predicate { |
| public: |
| typedef Arg argument_type; |
| typedef bool result_type; |
| |
| unary_counting_predicate(Predicate p) : p_(p), count_(0) {} |
| ~unary_counting_predicate() {} |
| |
| bool operator () (const Arg &a) const { ++count_; return p_(a); } |
| size_t count() const { return count_; } |
| void reset() { count_ = 0; } |
| |
| private: |
| Predicate p_; |
| mutable size_t count_; |
| }; |
| |
| |
| template <typename Predicate, typename Arg1, typename Arg2=Arg1> |
| struct binary_counting_predicate { |
| public: |
| typedef Arg1 first_argument_type; |
| typedef Arg2 second_argument_type; |
| typedef bool result_type; |
| |
| binary_counting_predicate ( Predicate p ) : p_(p), count_(0) {} |
| ~binary_counting_predicate() {} |
| |
| bool operator () (const Arg1 &a1, const Arg2 &a2) const { ++count_; return p_(a1, a2); } |
| size_t count() const { return count_; } |
| void reset() { count_ = 0; } |
| |
| private: |
| Predicate p_; |
| mutable size_t count_; |
| }; |
| |
| #if TEST_STD_VER > 14 |
| |
| template <class Predicate> |
| class counting_predicate { |
| Predicate pred_; |
| int* count_ = nullptr; |
| |
| public: |
| constexpr counting_predicate() = default; |
| constexpr counting_predicate(Predicate pred, int& count) : pred_(std::move(pred)), count_(&count) {} |
| |
| template <class... Args> |
| constexpr decltype(auto) operator()(Args&& ...args) { |
| ++(*count_); |
| return pred_(std::forward<Args>(args)...); |
| } |
| |
| template <class... Args> |
| constexpr decltype(auto) operator()(Args&& ...args) const { |
| ++(*count_); |
| return pred_(std::forward<Args>(args)...); |
| } |
| }; |
| |
| template <class Predicate> |
| counting_predicate(Predicate pred, int& count) -> counting_predicate<Predicate>; |
| |
| #endif // TEST_STD_VER > 14 |
| |
| #endif // TEST_SUPPORT_COUNTING_PREDICATES_H |