Author: Vlad Serebrennikov
Date: 2023-05-31T10:17:27+03:00
New Revision: 238f15820e71080b0bbc7d6ee95303fdb430d6fa

URL: 
https://github.com/llvm/llvm-project/commit/238f15820e71080b0bbc7d6ee95303fdb430d6fa
DIFF: 
https://github.com/llvm/llvm-project/commit/238f15820e71080b0bbc7d6ee95303fdb430d6fa.diff

LOG: [clang] Add test for CWG873

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

Reviewed By: #clang-language-wg, shafik

Differential Revision: https://reviews.llvm.org/D151704

Added: 
    clang/test/CXX/drs/dr8xx.cpp

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

Removed: 
    


################################################################################
diff  --git a/clang/test/CXX/drs/dr6xx.cpp b/clang/test/CXX/drs/dr6xx.cpp
index 59331e7de7687..a08f55dd562a4 100644
--- a/clang/test/CXX/drs/dr6xx.cpp
+++ b/clang/test/CXX/drs/dr6xx.cpp
@@ -234,7 +234,7 @@ namespace dr619 { // dr619: yes
 
 // 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}}

diff  --git a/clang/test/CXX/drs/dr8xx.cpp b/clang/test/CXX/drs/dr8xx.cpp
new file mode 100644
index 0000000000000..d79430f9e03ca
--- /dev/null
+++ b/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

diff  --git a/clang/www/cxx_dr_status.html b/clang/www/cxx_dr_status.html
index ec2ac24450832..77790bceea851 100755
--- a/clang/www/cxx_dr_status.html
+++ b/clang/www/cxx_dr_status.html
@@ -3767,7 +3767,7 @@ <h2 id="cxxdr">C++ defect report implementation 
status</h2>
     <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 @@ <h2 id="cxxdr">C++ defect report implementation 
status</h2>
     <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>


        
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