lang: ast: convert RPN expression queue to ast and replace generic EXPR node with it

lang/ast/node.c

@@ -146,18 +146,21 @@ token_parse_function get_token_parser(
 	return better_parser ? better_parser : generic_parser;
 }
 
-struct ivy_ast_node *ast_node_create_with_size(
-	enum ivy_ast_node_type type, size_t size)
+struct ivy_ast_node *ast_node_create(enum ivy_ast_node_type type)
 {
-	struct ivy_ast_node *node = malloc(size);
+	const struct ast_node_type *type_info = get_ast_node_type(type);
+	if (!type_info) {
+		return NULL;
+	}
+
+	struct ivy_ast_node *node = malloc(type_info->n_node_size);
 	if (!node) {
 		return NULL;
 	}
 
-	memset(node, 0x0, size);
+	memset(node, 0x0, type_info->n_node_size);
 
 	node->n_type = type;
-
 	return node;
 }