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kotlinlang

I’m curious if it’s possible to create something in Kotlin where a stream of values is emitted only when one is requested. So something _like_ `iterator { produceValue() }` where produceValue is called each time the consumer calls `next()`

I think `generateSequence` matches what you want? Or `sequence` if it's more complicated

for example `generateSequence(0) { it + 1 }` gives you sequence of `0, 1, 2, ...` till you are calling `next()` / iterating

Potentially, yeah. Seems like <https://kotlinlang.org/docs/sequences.html#from-chunks> describes what I’m trying to do — “[yield()] return[s] an element to the sequence consumer and suspend the execution of sequence() until the next element is requested”

ye, if it's more complicated, you can use `sequence` to make iterable from function that suspends execution until next element needs more execution

if you can simply make a function `produceNextValue(currentValue)` then `generateSequence` is enough for you

Isn't this just a channel?

<https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.channels/-channel/>