lang: update bluelib api usage

lang/ast/class.c

@@ -2,7 +2,7 @@
 #include "iterate.h"
 #include "node.h"
 
-#include <blue/object/string.h>
+#include <blue/ds/string.h>
 #include <ivy/lang/lex.h>
 #include <stdio.h>
 
@@ -162,17 +162,20 @@ static void collect_children(
 	struct ivy_ast_node *node, struct ivy_ast_node_iterator *iterator)
 {
 	struct ivy_ast_class_node *c = (struct ivy_ast_class_node *)node;
-	b_queue_iterator it = {0};
-	b_queue_foreach (&it, &c->n_properties) {
+	b_queue_entry *entry = b_queue_first(&c->n_properties);
+	while (entry) {
 		struct ivy_ast_node *child
-			= b_unbox(struct ivy_ast_node, it.entry, n_entry);
+			= b_unbox(struct ivy_ast_node, entry, n_entry);
 		ast_node_iterator_enqueue_node(iterator, node, child);
+		entry = b_queue_next(entry);
 	}
 
-	b_queue_foreach (&it, &c->n_msg_handlers) {
+	entry = b_queue_first(&c->n_msg_handlers);
+	while (entry) {
 		struct ivy_ast_node *child
-			= b_unbox(struct ivy_ast_node, it.entry, n_entry);
+			= b_unbox(struct ivy_ast_node, entry, n_entry);
 		ast_node_iterator_enqueue_node(iterator, node, child);
+		entry = b_queue_next(entry);
 	}
 }