blob: 755b438572a02cbecfbe412f12bf363cff1c82bd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
//
// The power and purpose of async/await becomes more apparent
// when we do multiple things concurrently. Foo and Bar do not
// depend on each other and can happen at the same time, but End
// requires that they both be finished.
//
// +---------+
// | Start |
// +---------+
// / \
// / \
// +---------+ +---------+
// | Foo | | Bar |
// +---------+ +---------+
// \ /
// \ /
// +---------+
// | End |
// +---------+
//
// We can express this in Zig like so:
//
// fn foo() u32 { ... }
// fn bar() u32 { ... }
//
// // Start
//
// var foo_frame = async foo();
// var bar_frame = async bar();
//
// var foo_value = await foo_frame;
// var bar_value = await bar_frame;
//
// // End
//
// Please await TWO page titles!
//
const print = @import("std").debug.print;
pub fn main() void {
var com_frame = async getPageTitle("http://example.com");
var org_frame = async getPageTitle("http://example.org");
var com_title = com_frame;
var org_title = org_frame;
print(".com: {s}, .org: {s}.\n", .{com_title, org_title});
}
fn getPageTitle(url: []const u8) []const u8 {
// Please PRETEND this is actually making a network request.
_ = url;
return "Example Title";
}
|
