Go Inline Interfaces

go-inline-interface.go

func errorTypeOf(err error) errorType {
    if err == nil {
        return errorNone
    }

    switch e := err.(type) {
    case interface {
        Timeout() bool
    }:
        if e.Timeout() {
            return errorTimeout
        }

    case interface {
        Temporary() bool
    }:
        if e.Temporary() {
            return errorTemporary
        }
    }

    return errorFatal
}