LWG issue 3024

[zoecarver]

Summary

Add tests for 3024 and mark it as complete in status. Reference to 3024.

[mclow.lists]

This looks fine to me - except that the added file is in the wrong place. It should be test/std/utilities/variant/variant.variant/variant.assign/copy.fail.cpp
Add add a newline at the end of the file.

I can make these changes myself and commit this if you would like.

[zoecarver]

• change location
• add newline

[zoecarver]

• fix name (oops)

[mclow.lists]

Committed as revision 360586

test/std/utilities/variant/variant.variant/variant.assign/copy.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>
+
+// LWG issue 3024
+
+#include <variant>
+#include <type_traits>
+
+struct NotCopyConstructible
+{
+    NotCopyConstructible() = default;
+    NotCopyConstructible(NotCopyConstructible const&) = delete;
+};
+
+int main(int, char**)
+{
+    static_assert(!std::is_copy_constructible_v<NotCopyConstructible>);
+
+    std::variant<NotCopyConstructible> v;
+    std::variant<NotCopyConstructible> v1;
+    std::variant<NotCopyConstructible> v2(v); // expected-error {{call to implicitly-deleted copy constructor of 'std::variant<NotCopyConstructible>'}}
+    v1 = v; // expected-error {{object of type 'std::__1::variant<NotCopyConstructible>' cannot be assigned because its copy assignment operator is implicitly deleted}}
+}

www/cxx2a_status.html

-->
   <tr><td><a href="https://wg21.link/LWG2979">2979</a></td><td>aligned_union should require complete object types</td><td>Albuquerque</td><td>Complete</td></tr>
   <tr><td><a href="https://wg21.link/LWG2980">2980</a></td><td>Cannot compare_exchange empty pointers</td><td>Albuquerque</td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2981">2981</a></td><td>Remove redundant deduction guides from standard library</td><td>Albuquerque</td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2982">2982</a></td><td>Making size_type consistent in associative container deduction guides</td><td>Albuquerque</td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2988">2988</a></td><td>Clause 32 cleanup missed one typename</td><td>Albuquerque</td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2993">2993</a></td><td>reference_wrapper<T> conversion from T&&</td><td>Albuquerque</td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2998">2998</a></td><td>Requirements on function objects passed to {forward_,}list-specific algorithms</td><td>Albuquerque</td><td><i>Nothing to do</i></td></tr>
   <tr><td><a href="https://wg21.link/LWG3001">3001</a></td><td>weak_ptr::element_type needs remove_extent_t</td><td>Albuquerque</td><td></td></tr>
-  <tr><td><a href="https://wg21.link/LWG3024">3024</a></td><td>variant's copies must be deleted instead of disabled via SFINAE</td><td>Albuquerque</td><td></td></tr>
+  <tr><td><a href="https://wg21.link/LWG3024">3024</a></td><td>variant's copies must be deleted instead of disabled via SFINAE</td><td>Albuquerque</td><td>Complete</td></tr>
 
    <tr><td></td><td></td><td></td><td></td></tr>
   <tr><td><a href="https://wg21.link/LWG2164">2164</a></td><td>What are the semantics of <tt>vector.emplace(vector.begin(), vector.back())</tt>?</td><td>Jacksonville</td><td>Complete</td></tr>
   <tr><td><a href="https://wg21.link/LWG2243">2243</a></td><td><tt>istream::putback</tt> problem</td><td>Jacksonville</td><td>Complete</td></tr>
   <tr><td><a href="https://wg21.link/LWG2816">2816</a></td><td><tt>resize_file</tt> has impossible postcondition</td><td>Jacksonville</td><td><i>Nothing to do</i></td></tr>
   <tr><td><a href="https://wg21.link/LWG2843">2843</a></td><td>Unclear behavior of <tt>std::pmr::memory_resource::do_allocate()</tt></td><td>Jacksonville</td><td>Complete</td></tr>
   <tr><td><a href="https://wg21.link/LWG2849">2849</a></td><td>Why does <tt>!is_regular_file(from)</tt> cause <tt>copy_file</tt> to report a "file already exists" error?</td><td>Jacksonville</td><td><i>Nothing to do</i></td></tr>
   <tr><td><a href="https://wg21.link/LWG2851">2851</a></td><td><tt>std::filesystem</tt> enum classes are now underspecified</td><td>Jacksonville</td><td><i>Nothing to do</i></td></tr>