return own custom error from template while it executed

[Vasiliy Tolstov]

Hi. I can't find in google how to solve my problem. Inside
text/template i want to check some passed data and return some
descriptive text if conditions not matching.
I don't have ability to check it before template executed. Does it possible?

--
Vasiliy Tolstov,
e-mail: v.to...@selfip.ru

[Shulhan]

14 Jan 2021 17:32:37 Vasiliy Tolstov <v.to...@selfip.ru>:

> Hi. I can't find in google how to solve my problem. Inside
> text/template i want to check some passed data and return some
> descriptive text if conditions not matching.
> I don't have ability to check it before template executed. Does it
possible?
>

I am not sure your exact problem. So, you have a function that accept
data and you want to check the data before passing it to template
execution? Why you can not check it before template executed?