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4dee6411e0
This adds addressof at the required places in [input.output]. Some of the new tests failed since string used operator& internally. These have been fixed too. Note the new fstream tests perform output to a basic_string instead of a double. Using a double requires num_get specialization num_get<CharT, istreambuf_iterator<CharT, char_traits_operator_hijacker<CharT>> This facet is not present in the locale database so the conversion would fail due to a missing locale facet. Using basic_string avoids using the locale. As a drive-by fixes several bugs in the ofstream.cons tests. These tested ifstream instead of ofstream with an open mode. Implements: - LWG3130 [input.output] needs many addressof Closes #100246.
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef SUPPORT_OPERATOR_HIJACKER_H
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#define SUPPORT_OPERATOR_HIJACKER_H
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#include <cstddef>
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#include <memory>
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#include <functional>
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#include <string>
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#include "test_macros.h"
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/// Helper struct to test ADL-hijacking in containers.
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///
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/// The class has some additional operations to be usable in all containers.
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struct operator_hijacker {
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TEST_CONSTEXPR bool operator<(const operator_hijacker&) const { return true; }
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TEST_CONSTEXPR bool operator==(const operator_hijacker&) const { return true; }
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template <typename T>
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friend void operator&(T&&) = delete;
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template <class T, class U>
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friend void operator,(T&&, U&&) = delete;
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template <class T, class U>
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friend void operator&&(T&&, U&&) = delete;
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template <class T, class U>
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friend void operator||(T&&, U&&) = delete;
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};
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static_assert(std::is_trivially_copyable<operator_hijacker>::value && //
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std::is_copy_constructible<operator_hijacker>::value && //
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std::is_move_constructible<operator_hijacker>::value && //
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std::is_copy_assignable<operator_hijacker>::value && //
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std::is_move_assignable<operator_hijacker>::value, //
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"does not satisfy the requirements for atomic<operator_hijacker>");
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template <>
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struct std::hash<operator_hijacker> {
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std::size_t operator()(const operator_hijacker&) const { return 0; }
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};
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template <class T>
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struct operator_hijacker_allocator : std::allocator<T>, operator_hijacker {
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#if TEST_STD_VER <= 17
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struct rebind {
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typedef operator_hijacker_allocator<T> other;
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};
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#endif
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};
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template <class CharT>
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struct operator_hijacker_char_traits : std::char_traits<CharT>, operator_hijacker {};
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#endif // SUPPORT_OPERATOR_HIJACKER_H
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