What is the difference between `IrSimpleFunction` ...

# compiler

[Ji Sungbin]

What is the difference between IrSimpleFunction and IrFunction? I don’t know, except that IrSimpleFunction inherits from IrFunction and has more properties. I’m confused about whether to choose IrSimpleFunction or IrFunction.

I referenced Tóth István Zoltán’s answer from 3 months ago (thanks!),

visitSimpleFunction it restricts the function type you visit to IrSimpleFunction, it calls visitFunction if not overridden so it is almost the same as visitFunction but leaves out non-simple functions such as constructors.

https://kotlinlang.slack.com/archives/C7L3JB43G/p1693196602086569?thread_ts=1693111695.756429&cid=C7L3JB43G

but I still don’t understand what IrSimpleFunction considers “simple”.

[dmitriy.novozhilov]

There are two kinds of functions in IR: regular (simple) functions and constructors

[Ji Sungbin]

Wow... That's a really short and perfect explanation, thank you!