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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 SUPPORT_OPERATOR_HIJACKER_H
#define SUPPORT_OPERATOR_HIJACKER_H
#include <cstddef>
#include <functional>
#include <memory>
#include <string>
#include <type_traits>
#include "test_macros.h"
/// Helper struct to test ADL-hijacking in containers.
///
/// The class has some additional operations to be usable in all containers.
struct operator_hijacker {
TEST_CONSTEXPR bool operator<(const operator_hijacker&) const { return true; }
TEST_CONSTEXPR bool operator==(const operator_hijacker&) const { return true; }
TEST_CONSTEXPR int operator()() const { return 42; }
template <typename T>
friend void operator&(T&&) = delete;
template <class T, class U>
friend void operator,(T&&, U&&) = delete;
template <class T, class U>
friend void operator&&(T&&, U&&) = delete;
template <class T, class U>
friend void operator||(T&&, U&&) = delete;
};
static_assert(std::is_trivially_copyable<operator_hijacker>::value && //
std::is_copy_constructible<operator_hijacker>::value && //
std::is_move_constructible<operator_hijacker>::value && //
std::is_copy_assignable<operator_hijacker>::value && //
std::is_move_assignable<operator_hijacker>::value, //
"does not satisfy the requirements for atomic<operator_hijacker>");
template <>
struct std::hash<operator_hijacker> {
std::size_t operator()(const operator_hijacker&) const { return 0; }
};
template <class T>
struct operator_hijacker_allocator : std::allocator<T>, operator_hijacker {
#if TEST_STD_VER <= 17
struct rebind {
typedef operator_hijacker_allocator<T> other;
};
#endif
};
template <class CharT>
struct operator_hijacker_char_traits : std::char_traits<CharT>, operator_hijacker {};
#endif // SUPPORT_OPERATOR_HIJACKER_H
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