[clang] [clang] Add test for CWG2267 (PR #67931)

[Vlad Serebrennikov via cfe-commits]

https://github.com/Endilll created https://github.com/llvm/llvm-project/pull/67931

Related: #63416

>From 4720a0f6bce7b1531dec2005d642938db1370335 Mon Sep 17 00:00:00 2001
From: Vlad Serebrennikov <serebrennikov.vladislav at gmail.com>
Date: Sun, 1 Oct 2023 21:28:21 +0300
Subject: [PATCH] [clang] Add test for CWG2267

---
 clang/test/CXX/drs/dr22xx.cpp | 22 ++++++++++++++++++++++
 clang/www/cxx_dr_status.html  |  2 +-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/clang/test/CXX/drs/dr22xx.cpp b/clang/test/CXX/drs/dr22xx.cpp
index 414925f0d74cc2e..cd849443b1119ba 100644
--- a/clang/test/CXX/drs/dr22xx.cpp
+++ b/clang/test/CXX/drs/dr22xx.cpp
@@ -123,6 +123,28 @@ namespace CheckAfterMerging2 {
 #endif
 } // namespace dr2233
 
+namespace dr2267 { // dr2267: no
+#if __cplusplus >= 201103L
+struct A {} a;
+struct B { explicit B(const A&); }; // #dr2267-struct-B
+
+struct D { D(); };
+struct C { explicit operator D(); } c;
+
+B b1(a);
+const B &b2{a}; // FIXME ill-formed
+const B &b3(a);
+// expected-error at -1 {{no viable conversion from 'struct A' to 'const B'}}
+// expected-note@#dr2267-struct-B {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'struct A' to 'const B &' for 1st argument}}
+// expected-note@#dr2267-struct-B {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'struct A' to 'B &&' for 1st argument}}
+// expected-note@#dr2267-struct-B {{explicit constructor is not a candidate}}
+
+D d1(c);
+const D &d2{c}; // FIXME ill-formed
+const D &d3(c); // FIXME ill-formed
+#endif
+}
+
 namespace dr2292 { // dr2292: 9
 #if __cplusplus >= 201103L
   template<typename T> using id = T;
diff --git a/clang/www/cxx_dr_status.html b/clang/www/cxx_dr_status.html
index ee9712e9bab9949..49386bbbc44c80f 100755
--- a/clang/www/cxx_dr_status.html
+++ b/clang/www/cxx_dr_status.html
@@ -13409,7 +13409,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/2267.html">2267</a></td>
     <td>CD5</td>
     <td>Copy-initialization of temporary in reference direct-initialization</td>
-    <td class="none" align="center">Unknown</td>
+    <td class="none" align="center">No</td>
   </tr>
   <tr id="2268">
     <td><a href="https://cplusplus.github.io/CWG/issues/2268.html">2268</a></td>