On 3/8/22 11:44 AM, Bram Moolenaar wrote:
On 3/8/22 5:20 AM, Bram Moolenaar wrote:
Patch 8.2.4526
Problem: Vim9: cannot set variables to a null value.
Solution: Add null_list, null_job, etc.
How about an "is_null(t: any): bool" method, (or "isnull()")? I could
roll my own, but the "if else if else ..." seems expensive. (unless it
gets optimized internally into a switch-case :-) )
What is it you want to do? We recently added support for comparing with
"null". That will match all the null_* values. Thus allo of these are
true:
null == null_string
null == null_blob
null == null_list
null == null_function
null == null_job
In the previous discussion I had thought that given var t:string,
it was necessary to do "if t is null_string" to test if it is
really null. I'm looking for a way to test for really null uniformly
no matter the type, and without noting if I need to use "is".
I'll build a new vim today and run some experiments, which I should
have done before posting the message.
-ernie
Still need to add some more tests. It worked with the functions before,
so it should work with the value as well.
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