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authorChris Boesch <chrboesch@noreply.codeberg.org>2026-04-07 09:18:37 +0200
committerChris Boesch <chrboesch@noreply.codeberg.org>2026-04-07 09:18:37 +0200
commit7cb7a9948a9f5c9965fedd59f0cd816f28962fe4 (patch)
tree1953e653faba351ab103ec030eacbfc79b7dae6c /exercises/084_async.zig
parent1166f3cfb65d7edc9086c6ba6b8edd4754964b33 (diff)
parent3574fd3ae037f34510c6bb6657332b57447ac5b1 (diff)
Merge branch 'main' into fix-060
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diff --git a/exercises/084_async.zig b/exercises/084_async.zig
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-//
-// Six Facts:
-//
-// 1. The memory space allocated to your program for the
-// invocation of a function and all of its data is called a
-// "stack frame".
-//
-// 2. The 'return' keyword "pops" the current function
-// invocation's frame off of the stack (it is no longer needed)
-// and returns control to the place where the function was
-// called.
-//
-// fn foo() void {
-// return; // Pop the frame and return control
-// }
-//
-// 3. Like 'return', the 'suspend' keyword returns control to the
-// place where the function was called BUT the function
-// invocation's frame remains so that it can regain control again
-// at a later time. Functions which do this are "async"
-// functions.
-//
-// fn fooThatSuspends() void {
-// suspend {} // return control, but leave the frame alone
-// }
-//
-// 4. To call any function in async context and get a reference
-// to its frame for later use, use the 'async' keyword:
-//
-// var foo_frame = async fooThatSuspends();
-//
-// 5. If you call an async function without the 'async' keyword,
-// the function FROM WHICH you called the async function itself
-// becomes async! In this example, the bar() function is now
-// async because it calls fooThatSuspends(), which is async.
-//
-// fn bar() void {
-// fooThatSuspends();
-// }
-//
-// 6. The main() function cannot be async!
-//
-// Given facts 3 and 4, how do we fix this program (broken by facts
-// 5 and 6)?
-//
-const print = @import("std").debug.print;
-
-pub fn main() void {
- // Additional Hint: you can assign things to '_' when you
- // don't intend to do anything with them.
- foo();
-}
-
-fn foo() void {
- print("foo() A\n", .{});
- suspend {}
- print("foo() B\n", .{});
-}