libcxx/test/std/utilities/variant/variant.variant/variant.assign/copy.verify.cpp

   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
  10
  11 // <variant>
  12
  13 // LWG issue 3024
  14
  15 #include <variant>
  16 #include <type_traits>
  17
  18 struct NotCopyConstructible
  19 {
  20     NotCopyConstructible() = default;
  21     NotCopyConstructible(NotCopyConstructible const&) = delete;
  22 };
  23
  24 int main(int, char**)
  25 {
  26     static_assert(!std::is_copy_constructible_v<NotCopyConstructible>);
  27
  28     std::variant<NotCopyConstructible> v;
  29     std::variant<NotCopyConstructible> v1;
  30     std::variant<NotCopyConstructible> v2(v); // expected-error {{call to implicitly-deleted copy constructor of 'std::variant<NotCopyConstructible>'}}
  31     v1 = v; // expected-error-re {{object of type 'std:{{.*}}:variant<NotCopyConstructible>' cannot be assigned because its copy assignment operator is implicitly deleted}}
  32 }