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//
// 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 {
const a: u32 = addFive(44) catch 0;
const b: u32 = addFive(14) catch 0;
const 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".
//
const x = try 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;
}
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