@@ -0,0 +1,49 @@
+//===--===//
+// 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
+
+// constexpr void value() const &;
+// Mandates: is_copy_constructible_v is true.
+
+// constexpr void value() &&;
+// Mandates: is_copy_constructible_v is true and is_move_constructible_v
is true.
+
+#include
+
+#include "MoveOnly.h"
+
+struct CopyOnly {
+ CopyOnly()= default;
+ CopyOnly(const CopyOnly&) = default;
+ CopyOnly(CopyOnly&&) = delete;
+};
+
+void test() {
+ // MoveOnly type as error_type
+ std::expected e(std::unexpect, 5);
+
+ e.value(); // expected-note {{in instantiation of member function
'std::expected::value' requested here}}
+ // expected-error@*:* {{static assertion failed due to requirement
'is_copy_constructible_v'}}
+
+ std::move(e)
+ .value(); // expected-note {{in instantiation of member function
'std::expected::value' requested here}}
+ // expected-error@*:* {{static assertion failed due to requirement
'is_copy_constructible_v': error_type has to be both copy
constructible and move constructible}}
+
+ // CopyOnly type as error_type
+ std::expected e2(std::unexpect);
+
+ e2.value();
+
+ std::move(e2)
+ .value(); // expected-note {{in instantiation of member function
'std::expected::value' requested here}}
+ // expected-error@*:* {{static assertion failed due to requirement
'is_move_constructible_v': error_type has to be both copy
constructible and move constructible}}
+
+ // expected-error@*:* {{call to deleted constructor of 'MoveOnly'}}
+ // expected-error@*:* {{call to deleted constructor of 'CopyOnly'}}
+ // expected-error@*:* {{call to deleted constructor of 'CopyOnly'}}
PragmaTwice wrote:
Fixed : )
https://github.com/llvm/llvm-project/pull/71819
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