Revert "Disable inherited constructors for 2.9."

It is only meant for the release branch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127542 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticSemaKinds.td

@@ -164,8 +164,6 @@ def err_using_decl_nested_name_specifier_is_current_class : Error<
   "using declaration refers to its own class">;
 def err_using_decl_nested_name_specifier_is_not_base_class : Error<
   "using declaration refers into '%0', which is not a base class of %1">;
-def err_using_decl_inherited_constructor_unsupported : Error<
-  "inherited constructors are not supported">;
 def err_using_decl_constructor_not_in_direct_base : Error<
   "%0 is not a direct base of %1, can not inherit constructors">;
 def err_using_decl_constructor_conflict : Error<

lib/Sema/SemaDeclCXX.cpp

@@ -2898,8 +2898,7 @@ void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) {
   //   waste space and performance on classes that are not meant to be
   //   instantiated (e.g. meta-functions). This doesn't apply to classes that
   //   have inherited constructors.
-  // Disabled for 2.9
-  //DeclareInheritedConstructors(Record);
+  DeclareInheritedConstructors(Record);
 }
 
 /// \brief Data used with FindHiddenVirtualMethod
@@ -4325,11 +4324,8 @@ NamedDecl *Sema::BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
 
   // Constructor inheriting using decls get special treatment.
   if (NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName) {
-    // Disabled for 2.9
-    Diag(UD->getLocation(),
-         diag::err_using_decl_inherited_constructor_unsupported);
-    //if (CheckInheritedConstructorUsingDecl(UD))
-    UD->setInvalidDecl();
+    if (CheckInheritedConstructorUsingDecl(UD))
+      UD->setInvalidDecl();
     return UD;
   }
 

test/CXX/special/class.inhctor/elsewhere.cpp

@@ -1,6 +1,4 @@
-// RUN: true
-// Disabled for 2.9
-//%clang_cc1 -std=c++0x -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
 
 // Tests related to constructor inheriting, but not specified in [class.inhctor]
 

test/CXX/special/class.inhctor/p3.cpp

@@ -1,6 +1,4 @@
-// RUN: true
-// Disabled for 2.9
-//%clang_cc1 -std=c++0x -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
 
 struct B1 {
   B1(int);

test/CXX/special/class.inhctor/p7.cpp

@@ -1,6 +1,4 @@
-// RUN: true
-// Disabled for 2.9
-//%clang_cc1 -std=c++0x -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
 
 // Straight from the standard
 struct B1 {