> It's quite rare for a function to unexpectedly gain a dependency on "doing IO" in general.
From the code sample it looks like printing to stdio will now require an Io param. So won’t you now have to pass that down to wherever you want to do a quick debug printf?
Zig has specifically a std.debug.print() function for debug printing and a std.log module for logging. Those don't necessarily need to be wired up with the whole stdio machinery.
Yes. You can always use the blocking syscalls your OS provides and ignore the Io system for stuff like that. No idea how they’d do that by default in the stdlib, but it will definitely be possible.
I think the key is, if you don't have an "io" in your call stack you can always create one. At least I hope that is how it would work. Otherwise it is equally viral to async await.
