[PATCH] D151704: [clang] Add test for CWG873

[Vlad Serebrennikov via Phabricator via cfe-commits]

Endill created this revision.
Endill added reviewers: clang-language-wg, shafik, erichkeane.
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Also add missing marking to the test of related issue 621.

https://cplusplus.github.io/CWG/issues/621.html
https://cplusplus.github.io/CWG/issues/873.html


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151704

Files:
  clang/test/CXX/drs/dr6xx.cpp
  clang/test/CXX/drs/dr8xx.cpp
  clang/www/cxx_dr_status.html


Index: clang/www/cxx_dr_status.html
===================================================================
--- clang/www/cxx_dr_status.html
+++ clang/www/cxx_dr_status.html
@@ -3767,7 +3767,7 @@
     <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>
@@ -5117,7 +5117,7 @@
     <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>
Index: clang/test/CXX/drs/dr8xx.cpp
===================================================================
--- /dev/null
+++ clang/test/CXX/drs/dr8xx.cpp
@@ -0,0 +1,30 @@
+// 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
Index: clang/test/CXX/drs/dr6xx.cpp
===================================================================
--- clang/test/CXX/drs/dr6xx.cpp
+++ clang/test/CXX/drs/dr6xx.cpp
@@ -234,7 +234,7 @@
 
 // dr620: dup 568
 
-namespace dr621 {
+namespace dr621 { // dr621: yes
   template<typename T> T f();
   template<> int f() {} // expected-note {{previous}}
   template<> int f<int>() {} // expected-error {{redefinition}}


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