I'm looking to construct a custom logger API. For example:
log.verbose(Date(), "Begun process")
(That's contrived example, the point being some object and a message. I will then be manipulating both.)
Within my Log object I then want to transform the date value and the message into a final log message. "Nanoseconds: 9790324:: Begun process". If I was working with strings, it would be a pretty simple issue. But I'm not. It looks like Logger, which actually does the logging takes in a OSLogMessage which I cannot instantiate and cannot pass by value or reference. Even if I had just:
func verbose(_ date: Date, _ message: OSLogInterpolation) {
log(date: Date, level: .info, message: message)
}
func info(_ date: Date, _ message: OSLogInterpolation) {
log(date: Date, level: .default, message: message)
}
private func log(date: Date, level: OSLogType, message: OSLogInterpolation) {
// Neither of these work
log.log(level: level, message)
log.log(level: level, OSLogMessage(interpolation: message))
}
Ideally what I'd like is:
private func log(date: Date, level: OSLogType, message: OSLogInterpolation) {
let interpolation = "Nanoseconds: \(date.getNanoseconds):: " + message
log.log(level: level, OSLogMessage(interpolation: interpolation))
}
With the idea being that OSLogMessage is still respecting any privacy notices on the interpolation.