Add a trace command

[OlegAlexander]

Hello and thank you for creating Husk.

I was wondering if it's not too late to add a trace command--a function that prints x to the console and returns x. For example, let's assume that * is the trace command in the following:

Husk.exe -u w*m↔*w "How is this even possible?"
["How", "is", "this", "even", "possible?"]
["woH", "si", "siht", "neve", "?elbissop"]
woH si siht neve ?elbissop

I think a trace command would make it much easier to debug programs and to learn Husk.

I tried setting debug level to 1 and 2 in Debug.hs, but those options don't do what I want.

It's also possible that the trace command already exists in Husk, but I missed it?

Thank you.

[barbuz]

Hi, thanks for taking interest in Husk!
The trace command is not currently included, due to the focus being on pure functions as much as possible, but a future update with some impure commands is planned.
At the moment the project is on a (way too long) break due to a bunch of things going on in life, but I'll try to come back to it as soon as circumstances allow and implement this and more.

[razetime]

might be an idea to add this outside the codepage.

[OlegAlexander]

@razetime that's a great idea. And now that I'm officially learning Haskell, I know that this function is simply traceShowId from Debug.Trace :)