1 files changed, 7 insertions, 7 deletions

diff --git a/gc.cpp b/gc.cpp
index 1cfd087..6221e7f 100644
--- a/gc.cpp
+++ b/gc.cpp
@@ -25,18 +25,18 @@ void*
 GC::alloc(size_t size)
 {
 	void* ret = malloc(size);
-	_heap.push_back((AST*)ret);
+	_heap.push_back((Object*)ret);
 	return ret;
 }
 
 inline void
-mark(CEnv& cenv, const AST* ast)
+mark(CEnv& cenv, const Object* obj)
 {
-	if (!ast || ast->used)
+	if (!obj || obj->used)
 		return;
 
-	ast->used = true;
-	const ATuple* tup = ast->to<const ATuple*>();
+	obj->used = true;
+	const ATuple* tup = dynamic_cast<const ATuple*>(obj);
 	if (tup) {
 		FOREACH(ATuple::const_iterator, i, *tup) {
 			mark(cenv, *i);
@@ -57,10 +57,10 @@ GC::collect(CEnv& cenv, const Roots& roots)
 		if ((*i)->used) {
 			(*i)->used = false;
 		} else {
-			AType* t = (*i)->to<AType*>();
+			AType* t = dynamic_cast<AType*>(*i);
 			// Don't delete types that are keys in the current type substitution
 			if (!t || cenv.tsubst.find(t) == cenv.tsubst.end()) {
-				(*i)->~AST();
+				(*i)->~Object();
 				free(*i);
 				_heap.erase(i);
 			}