diff options
Diffstat (limited to 'lib/Sema/SemaCXXCast.cpp')
| -rw-r--r-- | lib/Sema/SemaCXXCast.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Sema/SemaCXXCast.cpp b/lib/Sema/SemaCXXCast.cpp index 31a772a5d8..52a13ef5b2 100644 --- a/lib/Sema/SemaCXXCast.cpp +++ b/lib/Sema/SemaCXXCast.cpp @@ -522,6 +522,14 @@ CheckDynamicCast(Sema &Self, ExprResult &SrcExpr, QualType DestType, return; } + // If the source class is marked 'final', and the destination class does not + // derive from the source class, then we know that the result is always null. + if (SrcRecord->getDecl()->hasAttr<FinalAttr>() && + !Self.IsDerivedFrom(DestPointee, SrcPointee)) { + Kind = CK_DynamicToNull; + return; + } + // C++ 5.2.7p5 // Upcasts are resolved statically. if (DestRecord && Self.IsDerivedFrom(SrcPointee, DestPointee)) { |