initial support for recognizing __transparent_union__ attributes
comments on the ML will follow
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50262 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index c97ecc8..373aace 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -2003,6 +2003,9 @@
case AttributeList::AT_format:
HandleFormatAttribute(New, Attr);
break;
+ case AttributeList::AT_transparent_union:
+ HandleTransparentUnionAttribute(New, Attr);
+ break;
default:
#if 0
// TODO: when we have the full set of attributes, warn about unknown ones.
@@ -2419,6 +2422,29 @@
Idx.getZExtValue(), FirstArg.getZExtValue()));
}
+void Sema::HandleTransparentUnionAttribute(Decl *d, AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ TypeDecl *decl = dyn_cast<TypeDecl>(d);
+
+ if (!decl || !Context.getTypeDeclType(decl)->isUnionType()) {
+ Diag(rawAttr->getLoc(), diag::warn_attribute_wrong_decl_type,
+ "transparent_union", "union");
+ return;
+ }
+
+ QualType QTy = Context.getTypeDeclType(decl);
+ const RecordType *Ty = QTy->getAsUnionType();
+
+// FIXME
+// Ty->addAttr(new TransparentUnionAttr());
+}
+
void Sema::HandleAnnotateAttribute(Decl *d, AttributeList *rawAttr) {
// check the attribute arguments.
if (rawAttr->getNumArgs() != 1) {