Add support for parsing the objc_gc attribute. Tests will come shortly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55269 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index fd1b3e7..2cfb3b9 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -466,6 +466,37 @@
d->addAttr(new VisibilityAttr(type));
}
+static void HandleObjCGCAttr(Decl *d, const AttributeList &Attr, Sema &S) {
+ if (!Attr.getParameterName()) {
+ S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string,
+ "objc_gc", std::string("1"));
+ return;
+ }
+
+ if (Attr.getNumArgs() != 0) {
+ S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+
+ const char *TypeStr = Attr.getParameterName()->getName();
+ unsigned TypeLen = Attr.getParameterName()->getLength();
+
+ ObjCGCAttr::GCAttrTypes type;
+
+ if (TypeLen == 4 && !memcmp(TypeStr, "weak", 4))
+ type = ObjCGCAttr::Weak;
+ else if (TypeLen == 5 && !memcmp(TypeStr, "strong", 5))
+ type = ObjCGCAttr::Strong;
+ else {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported,
+ "objc_gc", TypeStr);
+ return;
+ }
+
+ d->addAttr(new ObjCGCAttr(type));
+}
+
static void HandleWeakAttr(Decl *d, const AttributeList &Attr, Sema &S) {
// check the attribute arguments.
if (Attr.getNumArgs() != 0) {
@@ -909,6 +940,7 @@
case AttributeList::AT_transparent_union:
HandleTransparentUnionAttr(D, Attr, S);
break;
+ case AttributeList::AT_objc_gc: HandleObjCGCAttr (D, Attr, S); break;
default:
#if 0
// TODO: when we have the full set of attributes, warn about unknown ones.