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//===----------------------------------------------------------------------===//
//
// 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;
TEST_CONSTEXPR_CXX20 unary_counting_predicate(Predicate p) : p_(p), count_(0) {}
unary_counting_predicate(const unary_counting_predicate&) = default;
unary_counting_predicate& operator=(const unary_counting_predicate&) = default;
TEST_CONSTEXPR_CXX20 ~unary_counting_predicate() {}
TEST_CONSTEXPR_CXX14 bool operator()(const Arg& a) const {
++count_;
return p_(a);
}
TEST_CONSTEXPR std::size_t count() const { return count_; }
TEST_CONSTEXPR_CXX14 void reset() { count_ = 0; }
private:
Predicate p_;
mutable std::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;
TEST_CONSTEXPR binary_counting_predicate(Predicate p) : p_(p), count_(0) {}
TEST_CONSTEXPR_CXX14 bool operator()(const Arg1& a1, const Arg2& a2) const {
++count_;
return p_(a1, a2);
}
TEST_CONSTEXPR std::size_t count() const { return count_; }
TEST_CONSTEXPR_CXX14 void reset() { count_ = 0; }
private:
Predicate p_;
mutable std::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
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