Timecode line parsing with time interval outputs.

timecode_line_parsing_time_interval.swift

let timecodeParser = timecodeHours
	.skip(StartsWith(":"))
	.take(timecodeMinutes)
	.skip(StartsWith(":"))
	.take(timecodeSeconds)
	.skip(StartsWith(","))
	.take(timecodeMilliseconds)
	.map { hours, minutes, seconds, milliseconds -> TimeInterval in
		let hoursInSeconds = Double(hours) * 60 * 60
		let minutesInSeconds = Double(minutes) * 60
		let millisecondsInSeconds = Double(milliseconds) * 1 / 1_000

		return hoursInSeconds + minutesInSeconds + Double(seconds) + millisecondsInSeconds
	}

let timecodeLineParser = timecodeParser
	.skip(StartsWith(" --> "))
	.take(timecodeParser) // ⇒ Parser<Substring, (TimeInterval, TimeInterval)>