--- /dev/null
+// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
+
+// expected-no-diagnostics
+
+namespace dr873 { // dr873: yes
+#if __cplusplus >= 201103L
+template <typename T> void f(T &&);
+template <> void f(int &) {} // #1
+template <> void f(int &&) {} // #2
+void g(int i) {
+ f(i); // calls f<int&>(int&), i.e., #1
+#pragma clang __debug dump f(i)
+ // CHECK: CallExpr {{.*}}
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}}
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} 'f' 'void (int &)' {{.*}}
+
+ f(0); // calls f<int>(int&&), i.e., #2
+#pragma clang __debug dump f(0)
+ // CHECK: CallExpr {{.*}}
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}}
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} 'f' 'void (int &&)' {{.*}}
+}
+#endif
+} // namespace dr873
<td><a href="https://cplusplus.github.io/CWG/issues/621.html">621</a></td>
<td>C++11</td>
<td>Template argument deduction from function return types</td>
- <td class="none" align="center">Unknown</td>
+ <td class="full" align="center">Yes</td>
</tr>
<tr id="622">
<td><a href="https://cplusplus.github.io/CWG/issues/622.html">622</a></td>
<td><a href="https://cplusplus.github.io/CWG/issues/873.html">873</a></td>
<td>C++11</td>
<td>Deducing rvalue references in declarative contexts</td>
- <td class="none" align="center">Unknown</td>
+ <td class="full" align="center">Yes</td>
</tr>
<tr id="874">
<td><a href="https://cplusplus.github.io/CWG/issues/874.html">874</a></td>