1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
10 
11 // <string>
12 
13 // basic_string(nullptr_t) = delete; // C++2b
14 // basic_string& operator=(nullptr_t) = delete; // C++2b
15 
16 #include <string>
17 #include <type_traits>
18 
19 static_assert(!std::is_convertible_v<decltype(nullptr), std::string>);
20 static_assert(!std::is_constructible_v<std::string, decltype(nullptr)>);
21 static_assert(!std::is_assignable_v<std::string, decltype(nullptr)>);
22