hardy gull
Basically I'm trying to design a function (generator of values) that can be suspended and needs to be resumed in order to produce new values. Function itself decides when the values are exhausted. But how do I find out at calling site that frame should no longer be resumed? Basically I'm having the same question as this post: https://stackoverflow.com/questions/65975848/in-zig-how-do-you-tell-if-a-frame-represents-a-fully-executed-function
compact notch
I don't believe there's currently a good way to do this; what I'd suggest is having its "returned" value be a ?T and on the last resume set it to null to signal that no more values are available and the generator shouldn't be called into again.
hardy gull
thanks for the tip! but still, it's a shame, because my "generator" will actually shuffle elements in place in some slice. but please correct me if i'm wrong - there's no nice/clean way to return values from async functions, so I must use either pointers or global values?
rich peak
what if you have a separate iterator that you call to actually retrieve the values (returning ?T)
mystic mountain
thanks for the tip! but still, it's a shame, because my "generator" will actuall...
async semantics only interacts with the return value. Its not meant to be used as a generator so itll be awkward to do such
its meant to be used for coroutines where:
"routine" = function: runs code and reports a return value when done
"coroutine" = function that can be suspended and resumed
compact notch
yeah - the normal solution here would be to make an actual iterator struct with regular methods instead. there aren't many cases where a single generator-style function is significantly nicer
celest lotus
This library uses async to implement generators: https://github.com/yrashk/zig-generator
hardy gull
thank you for the explanation, I'll need to refactor my code then.