blob: 8739e4a5414c678997c582e84a0b42d5841d5574 (
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
|
//
// Zig has a handy "try" shortcut for this common error handling pattern:
//
// canFail() catch |err| return err;
//
// which can be more compactly written as:
//
// try canFail();
//
const std = @import("std");
const MyNumberError = error{
TooSmall,
TooBig,
};
pub fn main() void {
var a: u32 = addFive(44) catch 0;
var b: u32 = addFive(14) catch 0;
var c: u32 = addFive(4) catch 0;
std.debug.print("a={}, b={}, c={}\n", .{ a, b, c });
}
fn addFive(n: u32) MyNumberError!u32 {
// This function needs to return any error which might come back from detect().
// Please use a "try" statement rather than a "catch".
//
var x = detect(n);
return x + 5;
}
fn detect(n: u32) MyNumberError!u32 {
if (n < 10) return MyNumberError.TooSmall;
if (n > 20) return MyNumberError.TooBig;
return n;
}
|
