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tcfhgj • yesterday at 6:45 PM • 1 reply • view on HN

> In Zig, a function that does IO can be called the same way whether or not it performs async operations or not.

no, you can't, you need to pass a IO parameter

Replies

messe • yesterday at 7:10 PM

You will need to pass that for synchronous IO as well. All IO in the standard library is moving to the Io interface. Sync and async.

If I want to call a function that does asynchronous IO, I'll use:

   foo(io, ...);
If I want to call one that does synchronous IO, I'll write:

    foo(io, ...);
If I want to express that either one of the above can be run asynchronously if possible, I'll write:

    io.async(foo, .{ io, ... });
If I want to express that it must be run concurrently, then I'll write:

    try io.concurrent(foo, .{ io, ... });
Nowhere in the above do I distinguish whether or not foo does synchronous or asynchronous IO. I only mark that it does IO, by passing in a parameter of type std.Io.
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