P1787: //[[ https://cplusplus.github.io/CWG/issues/418.html | CWG418 ]] is resolved by trivial rephrasing along with that necessary for the new using-declaration interpretation.//
Wording: see changes to [dcl.fct.default]/9 and [over.match.best]/4.
[over.match.best]/4 includes [[ https://eel.is/c++draft/over.match.best#general-example-8 | an example ]] that is not properly diagnosed by Clang.
Reviewed By: #clang-language-wg, shafik
Differential Revision: https://reviews.llvm.org/D139429
}
}
+namespace dr418 { // dr418: no
+namespace example1 {
+void f1(int, int = 0);
+void f1(int = 0, int);
+
+void g() { f1(); }
+} // namespace example1
+
+namespace example2 {
+namespace A {
+void f2(int); // #dr418-f2-decl
+}
+namespace B {
+using A::f2;
+}
+namespace A {
+void f2(int = 3);
+}
+void g2() {
+ using B::f2;
+ f2(); // expected-error {{no matching function}}
+ // expected-note@#dr418-f2-decl {{requires 1 argument}}
+}
+} // namespace example2
+
+// example from [over.match.best]/4
+namespace example3 {
+namespace A {
+extern "C" void f(int = 5);
+}
+namespace B {
+extern "C" void f(int = 5);
+}
+
+using A::f;
+using B::f;
+
+void use() {
+ f(3);
+ f(); // FIXME: this should fail
+}
+} // namespace example3
+} // namespace dr418
+
namespace dr420 { // dr420: yes
template<typename T> struct ptr {
T *operator->() const;
<td><a href="https://wg21.link/cwg418">418</a></td>
<td>CD6</td>
<td>Imperfect wording on error on multiple default arguments on a called function</td>
- <td class="none" align="center">Unknown</td>
+ <td class="none" align="center">No</td>
</tr>
<tr class="open" id="419">
<td><a href="https://wg21.link/cwg419">419</a></td>