test/std/utilities/variant/variant.variant/variant.ctor/conv.fail.cpp

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++98, c++03, c++11, c++14

// <variant>

// template <class ...Types> class variant;

// template <class T> constexpr variant(T&&) noexcept(see below);

#include <variant>
#include <string>
#include <memory>

int main(int, char**)
{
  std::variant<int, int> v1 = 1; // expected-error {{no viable conversion}}
  std::variant<long, long long> v2 = 1; // expected-error {{no viable conversion}}
  std::variant<char> v3 = 1; // expected-error {{no viable conversion}}

  std::variant<std::string, float> v4 = 1; // expected-error {{no viable conversion}}
  std::variant<std::string, double> v5 = 1; // expected-error {{no viable conversion}}
  std::variant<std::string, bool> v6 = 1; // expected-error {{no viable conversion}}

  std::variant<int, bool> v7 = "meow"; // expected-error {{no viable conversion}}
  std::variant<int, bool const> v8 = "meow"; // expected-error {{no viable conversion}}
  std::variant<int, bool volatile> v9 = "meow"; // expected-error {{no viable conversion}}

  std::variant<bool> v10 = std::true_type(); // expected-error {{no viable conversion}}
  std::variant<bool> v11 = std::unique_ptr<char>(); // expected-error {{no viable conversion}}
  std::variant<bool> v12 = nullptr; // expected-error {{no viable conversion}}
}