how can i get the stacktrace of an error in functional style? throwing exception is not a right thing in FP.

You could use Kotlins Result type, or the Either type from Arrow (or the fancy new solution with context receivers), or build your own Result type that contains an exception 🙂

https://github.com/arrow-kt/arrow/pull/2816 This PR has been open for some time, and it solves the issue for 90%... I am still trying to get feedback on it. 90% in the sense that it can track the

bind()

or

raise

that failed the issue but if you reify into a couple intermediate values in between than it can only track up until the latest point that actually "raised" or short-circuited the DSL.

thank you guys

No worries 🙂 let me know if you need any help

for a more generic look at the concept, check out: https://fsharpforfunandprofit.com/posts/recipe-part2/

Scott Wlaschin ❤️