In constructors, don't generate implicit initializers for members of anonymous structs contained within anonymous unions.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140015 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index b3ec382..ecbff96 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -2262,6 +2262,19 @@
};
}
+/// \brief Determine whether the given indirect field declaration is somewhere
+/// within an anonymous union.
+static bool isWithinAnonymousUnion(IndirectFieldDecl *F) {
+ for (IndirectFieldDecl::chain_iterator C = F->chain_begin(),
+ CEnd = F->chain_end();
+ C != CEnd; ++C)
+ if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>((*C)->getDeclContext()))
+ if (Record->isUnion())
+ return true;
+
+ return false;
+}
+
static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info,
FieldDecl *Field,
IndirectFieldDecl *Indirect = 0) {
@@ -2293,7 +2306,8 @@
// Don't build an implicit initializer for union members if none was
// explicitly specified.
- if (Field->getParent()->isUnion())
+ if (Field->getParent()->isUnion() ||
+ (Indirect && isWithinAnonymousUnion(Indirect)))
return false;
// Don't try to build an implicit initializer if there were semantic
diff --git a/test/CXX/special/class.init/class.base.init/p8-0x.cpp b/test/CXX/special/class.init/class.base.init/p8-0x.cpp
index 81ed9c2..f857e3d 100644
--- a/test/CXX/special/class.init/class.base.init/p8-0x.cpp
+++ b/test/CXX/special/class.init/class.base.init/p8-0x.cpp
@@ -48,4 +48,12 @@
K(int n) : n(n) {}
K(int n, bool) : ndc(n) {}
};
+ struct Nested {
+ Nested() {}
+ union {
+ struct {
+ NoDefaultCtor ndc;
+ };
+ };
+ };
}