[clang] Mark CWG562 as N/A

[Endill]

Summary

P1787: CWG562 is resolved by defining lookup as occurring from a program point.
Wording: A single search in a scope S for a name N from a program point P finds all declarations that precede P to which any name that is the same as N ([basic.pre]) is bound in S. ([basic.lookup]/2)

[cor3ntin]

LGTM

[shafik]

LGTM

clang/test/CXX/drs/dr5xx.cpp

 // RUN: %clang_cc1 -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 // RUN: %clang_cc1 -std=c++20 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++2b %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
 
 // FIXME: This is included to avoid a diagnostic with no source location
 // pointing at the implicit operator new. We can't match such a diagnostic
 // with -verify.
 __extension__ typedef __SIZE_TYPE__ size_t;
 void *operator new(size_t); // expected-error 0-1{{missing exception spec}} expected-note{{candidate}}
 #if __cplusplus > 201402L
 namespace std {
namespace {
     struct S {};
     template<typename T> static void f(S);
   }
   void h(S s) {
     g(s);
   }
 }
 
+// dr562: na
+
 namespace dr564 { // dr564: yes
   extern "C++" void f(int);
   void f(int); // ok
   extern "C++" { extern int n; }
   int n; // ok
 }
 
 namespace dr565 { // dr565: yes

clang/www/cxx_dr_status.html

<tr id="561">
     <td>CD2</td>
     <td>Internal linkage functions in dependent name lookup</td>
     <td class="full" align="center">Yes</td>
   </tr>
   <tr id="562">
     <td><a href="https://wg21.link/cwg562">562</a></td>
     <td>CD6</td>
     <td><I>qualified-id</I>s in non-expression contexts</td>
-    <td class="none" align="center">Unknown</td>
+    <td class="na" align="center">N/A</td>
   </tr>
   <tr id="563">
     <td><a href="https://wg21.link/cwg563">563</a></td>
     <td>CD6</td>
     <td>Linkage specification for objects</td>
     <td class="none" align="center">Unknown</td>
   </tr>
   <tr id="564">