lang: ast: initial implementation of class parser

lang/ast/unit.c

@@ -17,6 +17,13 @@ static enum ivy_status parse_use_keyword(
 	return IVY_OK;
 }
 
+static enum ivy_status parse_class_keyword(
+	struct ivy_parser *ctx, struct ivy_token *tok)
+{
+	parser_push_state(ctx, IVY_AST_CLASS);
+	return IVY_OK;
+}
+
 static enum ivy_status add_child(
 	struct ivy_ast_node *parent, struct ivy_ast_node *child)
 {
@@ -42,6 +49,7 @@ struct ast_node_type unit_node_ops = {
 	.n_node_size = sizeof(struct ivy_ast_unit_node),
         .n_keyword_parsers = {
 		[IVY_KW_PACKAGE] = parse_package_keyword,
+		[IVY_KW_CLASS] = parse_class_keyword,
 		[IVY_KW_USE] = parse_use_keyword,
 	},
 };