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
69 lines
1.7 KiB
C++
69 lines
1.7 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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// optional<T>& operator=(nullopt_t) noexcept;
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#include <optional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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#include "archetypes.h"
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using std::optional;
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using std::nullopt_t;
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using std::nullopt;
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int main(int, char**)
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{
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{
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optional<int> opt;
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static_assert(noexcept(opt = nullopt) == true, "");
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opt = nullopt;
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assert(static_cast<bool>(opt) == false);
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}
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{
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optional<int> opt(3);
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opt = nullopt;
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assert(static_cast<bool>(opt) == false);
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}
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using TT = TestTypes::TestType;
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TT::reset();
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{
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optional<TT> opt;
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static_assert(noexcept(opt = nullopt) == true, "");
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assert(TT::destroyed == 0);
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opt = nullopt;
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assert(TT::constructed == 0);
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assert(TT::alive == 0);
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assert(TT::destroyed == 0);
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assert(static_cast<bool>(opt) == false);
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}
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assert(TT::alive == 0);
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assert(TT::destroyed == 0);
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TT::reset();
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{
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optional<TT> opt(42);
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assert(TT::destroyed == 0);
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TT::reset_constructors();
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opt = nullopt;
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assert(TT::constructed == 0);
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assert(TT::alive == 0);
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assert(TT::destroyed == 1);
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assert(static_cast<bool>(opt) == false);
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}
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assert(TT::alive == 0);
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assert(TT::destroyed == 1);
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TT::reset();
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return 0;
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}
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