Hi, I’m working on integrating Micrometer with `IO...

# arrow-contributors

[dnowak]

Hi, I’m working on integrating Micrometer with IO. I simply want to register the time it took to execute the IO. I have implemented .timed extension function that can be executed on IO. But I also want to have the possibility to call .timed on a function that returns IO. And have to generate 22 versions of that method 🙂. You have probably had the same “issue” (like with memoize). Do you have some ready to copy solution 🙂?

[raulraja]

No ready to go N arity macros yet though meta aims to solve this problem by annotating functions as polyadic and then you get the n arities code gen by the compiler

[raulraja]

this is probably for the end of the year since it’s lower priority

[raulraja]

and we don’t have yet a proposal syntax for it

[raulraja]

so the question is…

[dnowak]

I was not thinking on solving my problem basing on polyadic function. Also the idea looks great.

[dnowak]

I just would like to generate those 22 functions during build. I assumed that you have some solution for codegeneration on which I could base (stricly saying - copy it)

[aballano]

I'm afraid we don't have anything yet as you can see https://github.com/arrow-kt/arrow-core/blob/master/arrow-syntax/src/main/kotlin/arrow/syntax/function/memoization.kt

[dnowak]

I assumed that it was generated 🙂. Anyway I can start with a few functions (like up to 4 parameters) and let somebody else add other versions if needed. I hope that we will not reach 22 in our projects 😄.