Chapter 6.3: Creating Errors

Believe it or not, it’s actually a good thing to make your program fail - on purpose. Developers do this to stop the program early when something unexpected (or dangerous) happens.

In GLang, you can create your own errors using the uhoh built-in. It takes a msg (message) as its argument, outputs the error, and immediately halts execution.

uhoh("Something is broken...");

This can be super handy for type-checking or validating function arguments before something explodes later on.

func x(arg1) {
    if type(arg1) != "string" {
        uhoh("expected 'arg1' to be a string type");
    }
}

x(1);