[badc0ffee]

A link to doc.go, for the lazy:

https://cs.opensource.google/go/x/exp/+/645b1fa8:slog/doc.go...

Basically it says to pass in objects, not prepared strings, so the formatted output is only computed if the message is actually logged. That object can be a struct implementing the LogValuer interface to do any required work/produce formatted output.

[lanstin]

Oh cool, I hadn't run into LogValuer, that's cool. And passing pointers to strings rather than strings, hmmm.

[9rx]

> And passing pointers to strings rather than strings, hmmm.

Are you referring to the "URL" example? That isn't a case of passing pointers to strings, that is passing a URL (fmt.Stringer) where the String method has a pointer receiver.

To demonstrate why the pointer would be needed in that case, consider:

    type URL struct{}
    func (*URL) String() string { return "https://..." }
    func print(v any)           { fmt.Println(v.(fmt.Stringer).String()) }
    func main() {
        print(&URL{}) // ok
        print(URL{})  // panic
    }