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//===----------------------------------------------------------------------===//
//
// 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++03, c++11, c++14, c++17, c++20
// Test the mandates
// template<class G = E> constexpr E error_or(G&&) const &;
// Mandates: is_copy_constructible_v<G> is true and is_convertible_v<U, E> is true.
// template<class G = E> constexpr E error_or(G&&) &&;
// Mandates: is_move_constructible_v<G> is true and is_convertible_v<U, E> is true.
#include <expected>
#include <utility>
struct NonCopyable {
NonCopyable(int) {}
NonCopyable(const NonCopyable&) = delete;
};
struct NonMovable {
NonMovable(int) {}
NonMovable(NonMovable&&) = delete;
};
struct NotConvertibleFromInt {};
// clang-format off
void test() {
// const & overload
// !is_copy_constructible_v<G>,
{
const std::expected<void, NonCopyable> f1(std::unexpect, 0);
f1.error_or(5); // expected-note{{in instantiation of function template specialization 'std::expected<void, NonCopyable>::error_or<int>' requested here}}
// expected-error-re@*:* {{{{(static_assert|static assertion)}} failed {{.*}}error_type has to be copy constructible}}
// expected-error-re@*:* {{call to deleted constructor of{{.*}}}}
}
// const & overload
// !is_convertible_v<U, T>
{
const std::expected<void, NotConvertibleFromInt> f1(std::unexpect, NotConvertibleFromInt{});
f1.error_or(5); // expected-note{{in instantiation of function template specialization 'std::expected<void, NotConvertibleFromInt>::error_or<int>' requested here}}
// expected-error-re@*:* {{{{(static_assert|static assertion)}} failed {{.*}}argument has to be convertible to error_type}}
// expected-error-re@*:* {{no viable conversion from returned value of type{{.*}}}}
}
// && overload
// !is_move_constructible_v<T>,
{
std::expected<void, NonMovable> f1(std::unexpect, 0);
std::move(f1).error_or(5); // expected-note{{in instantiation of function template specialization 'std::expected<void, NonMovable>::error_or<int>' requested here}}
// expected-error-re@*:* {{{{(static_assert|static assertion)}} failed {{.*}}error_type has to be move constructible}}
// expected-error-re@*:* {{call to deleted constructor of{{.*}}}}
}
// && overload
// !is_convertible_v<U, T>
{
std::expected<void, NotConvertibleFromInt> f1(std::unexpect, NotConvertibleFromInt{});
std::move(f1).error_or(5); // expected-note{{in instantiation of function template specialization 'std::expected<void, NotConvertibleFromInt>::error_or<int>' requested here}}
// expected-error-re@*:* {{{{(static_assert|static assertion)}} failed {{.*}}argument has to be convertible to error_type}}
// expected-error-re@*:* {{no viable conversion from returned value of type{{.*}}}}
}
}
// clang-format on
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