31cbe0f240
C++98 and C++03 are effectively aliases as far as Clang is concerned. As such, allowing both std=c++98 and std=c++03 as Lit parameters is just slightly confusing, but provides no value. It's similar to allowing both std=c++17 and std=c++1z, which we don't do. This was discovered because we had an internal bot that ran the test suite under both c++98 AND c++03 -- one of which is redundant. Differential Revision: https://reviews.llvm.org/D80926
84 lines
2.2 KiB
C++
84 lines
2.2 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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// UNSUPPORTED: c++03, c++11, c++14
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// <optional>
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// template <class T> struct hash<optional<T>>;
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#include <optional>
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#include <string>
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#include <memory>
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#include <cassert>
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#include "poisoned_hash_helper.h"
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#include "test_macros.h"
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struct A {};
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struct B {};
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namespace std {
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template <>
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struct hash<B> {
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size_t operator()(B const&) TEST_NOEXCEPT_FALSE { return 0; }
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};
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}
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int main(int, char**)
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{
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using std::optional;
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const std::size_t nullopt_hash =
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std::hash<optional<double>>{}(optional<double>{});
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{
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optional<B> opt;
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ASSERT_NOT_NOEXCEPT(std::hash<optional<B>>()(opt));
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ASSERT_NOT_NOEXCEPT(std::hash<optional<const B>>()(opt));
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}
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{
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typedef int T;
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optional<T> opt;
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assert(std::hash<optional<T>>{}(opt) == nullopt_hash);
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opt = 2;
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assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
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}
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{
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typedef std::string T;
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optional<T> opt;
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assert(std::hash<optional<T>>{}(opt) == nullopt_hash);
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opt = std::string("123");
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assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
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}
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{
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typedef std::unique_ptr<int> T;
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optional<T> opt;
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assert(std::hash<optional<T>>{}(opt) == nullopt_hash);
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opt = std::unique_ptr<int>(new int(3));
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assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
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}
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{
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test_hash_enabled_for_type<std::optional<int> >();
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test_hash_enabled_for_type<std::optional<int*> >();
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test_hash_enabled_for_type<std::optional<const int> >();
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test_hash_enabled_for_type<std::optional<int* const> >();
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test_hash_disabled_for_type<std::optional<A>>();
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test_hash_disabled_for_type<std::optional<const A>>();
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test_hash_enabled_for_type<std::optional<B>>();
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test_hash_enabled_for_type<std::optional<const B>>();
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}
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return 0;
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}
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