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31 lines
1.0 KiB
C++
31 lines
1.0 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++98, c++03, c++11, c++14
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// <optional>
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// A program that necessitates the instantiation of template optional for
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// (possibly cv-qualified) nullopt_t is ill-formed.
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#include <optional>
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int main(int, char**)
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{
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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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optional<nullopt_t> opt; // expected-note 1 {{requested here}}
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optional<const nullopt_t> opt1; // expected-note 1 {{requested here}}
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optional<nullopt_t &> opt2; // expected-note 1 {{requested here}}
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optional<nullopt_t &&> opt3; // expected-note 1 {{requested here}}
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// expected-error@optional:* 4 {{instantiation of optional with nullopt_t is ill-formed}}
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return 0;
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}
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