Zig Academy · Lesson

Inferred Error Sets

Let Zig collect your errors for you.

Listing Errors Is Tedious

Naming every error a function might return can be a chore, especially when it calls other fallible functions. Zig can infer the set.

Write just !T with nothing before the bang. Zig studies the function body and figures out every error it can produce.

fn parse(s: []const u8) !u32 {
    // ...
}