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-//
-// Now that we know how to get an Io value, let's use it for
-// asynchronous execution!
-//
-// io.async() launches a function and returns a Future. The result
-// won't necessarily be available until you call .await() on it:
-//
-// var future = io.async(someFunction, .{ arg1, arg2 });
-// // ... do other work here ...
-// const result = future.await(io);
-//
-// The function *may* run immediately or on another thread -
-// your code doesn't need to care! That's the beauty of the
-// Io abstraction. (In the Threaded backend, if no thread is
-// available, the function runs synchronously right away and
-// .await() just returns the already-computed result.)
-//
-// io.async() returns a Future(T) where T is the return type
-// of the function you passed in. Future has two key methods:
-//
-// .await(io) - block until the result is ready, return it
-// .cancel(io) - request cancellation, then return the result
-//
-// Fix this program so that computeAnswer runs asynchronously
-// and its result is properly awaited.
-//
-const std = @import("std");
-
-pub fn main(init: std.process.Init) !void {
- const io = init.io;
-
- // Launch computeAnswer asynchronously.
- // io.async() takes a function and a tuple of its arguments.
- var future = io.async(computeAnswer, .{ 6, 7 });
-
- // Meanwhile, print something to show we're not blocked.
- std.debug.print("Computing... ", .{});
-
- // Now collect the result. What method on Future gives us
- // the value, blocking if it isn't ready yet?
- const answer = future.???(io);
-
- std.debug.print("The answer is: {}\n", .{answer});
-}
-
-fn computeAnswer(a: u32, b: u32) u32 {
- return a * b;
-}