commit d052a578de58cbbb638cbe2dba05242d1ff443b9
author Richard Smith <richard@metafoo.co.uk> Tue Oct 22 17:44:08 2019 -0700
committer Richard Smith <richard@metafoo.co.uk> Tue Oct 22 18:16:17 2019 -0700
tree 2f3ed903007c6a0459234ce4d05c40e8a33889a6
parent 437e0e5191ca255db27e86d232020844c1fd08c8

[c++2a] Allow comparison functions to be explicitly defaulted.

This adds some initial syntactic checking that only the appropriate
function signatures can be defaulted. No implicit definitions are
generated yet.

clang/lib/Parse/ParseDecl.cpp

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index b248d75..c41eb74 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -2349,7 +2349,8 @@
         Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
           << 0 /* default */;
       else
-        Diag(ConsumeToken(), diag::err_default_special_members);
+        Diag(ConsumeToken(), diag::err_default_special_members)
+            << getLangOpts().CPlusPlus2a;
     } else {
       InitializerScopeRAII InitScope(*this, D, ThisDecl);
 

clang/lib/Parse/ParseDeclCXX.cpp

diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index b98ce3e..6d4a1a4 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -2978,7 +2978,8 @@
         Diag(Tok, diag::err_default_delete_in_multiple_declaration)
           << 0 /* default */;
       else
-        Diag(ConsumeToken(), diag::err_default_special_members);
+        Diag(ConsumeToken(), diag::err_default_special_members)
+            << getLangOpts().CPlusPlus2a;
       return ExprError();
     }
   }