patch 9.0.1786: Vim9: need instanceof() function
Problem: Vim9: need instanceof() function
Solution: Implement instanceof() builtin
Implemented in the same form as Python's isinstance because it allows
for checking multiple class types at the same time.
closes: #12867
Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: LemonBoy <thatlemon@gmail.com>
diff --git a/src/typval.c b/src/typval.c
index a760f35..e8aebee 100644
--- a/src/typval.c
+++ b/src/typval.c
@@ -974,6 +974,34 @@
}
/*
+ * Give an error and return FAIL unless "args[idx]" is an object.
+ */
+ int
+check_for_object_arg(typval_T *args, int idx)
+{
+ if (args[idx].v_type != VAR_OBJECT)
+ {
+ semsg(_(e_object_required_for_argument_nr), idx + 1);
+ return FAIL;
+ }
+ return OK;
+}
+
+/*
+ * Give an error and return FAIL unless "args[idx]" is a class or a list.
+ */
+ int
+check_for_class_or_list_arg(typval_T *args, int idx)
+{
+ if (args[idx].v_type != VAR_CLASS && args[idx].v_type != VAR_LIST)
+ {
+ semsg(_(e_list_or_class_required_for_argument_nr), idx + 1);
+ return FAIL;
+ }
+ return OK;
+}
+
+/*
* Get the string value of a variable.
* If it is a Number variable, the number is converted into a string.
* tv_get_string() uses a single, static buffer. YOU CAN ONLY USE IT ONCE!