Keep track of whether a class is abstract or not. This is currently only used for the __is_abstract type trait.

llvm-svn: 67461

2 files changed, 6 insertions, 2 deletions

diff --git a/clang/lib/AST/DeclCXX.cpp b/clang/lib/AST/DeclCXX.cpp
index 5e9b0cd9f45..33e870bc0d6 100644
--- a/clang/lib/AST/DeclCXX.cpp
+++ b/clang/lib/AST/DeclCXX.cpp
@@ -27,8 +27,8 @@ CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, DeclContext *DC,
   : RecordDecl(K, TK, DC, L, Id),
     UserDeclaredConstructor(false), UserDeclaredCopyConstructor(false),
     UserDeclaredCopyAssignment(false), UserDeclaredDestructor(false),
-    Aggregate(true), PlainOldData(true), Polymorphic(false), Bases(0),
-    NumBases(0), Conversions(DC, DeclarationName()) { }
+    Aggregate(true), PlainOldData(true), Polymorphic(false), Abstract(false),
+    Bases(0), NumBases(0), Conversions(DC, DeclarationName()) { }
 
 CXXRecordDecl *CXXRecordDecl::Create(ASTContext &C, TagKind TK, DeclContext *DC,
                                      SourceLocation L, IdentifierInfo *Id,
diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 53be84b20d2..5a9de19254d 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -214,6 +214,10 @@ bool UnaryTypeTraitExpr::EvaluateTrait() const {
       return cast<CXXRecordDecl>(Record->getDecl())->isPolymorphic();
     }
     return false;
+  case UTT_IsAbstract:
+    if (const RecordType *RT = QueriedType->getAsRecordType())
+      return cast<CXXRecordDecl>(RT->getDecl())->isAbstract();
+    return false;
   }
 }