const time.stdArgShift

5 uses

	time (current package)
		format.go#L151: 	stdArgShift       = 16                 // extra argument in high bits, above low stdArgShift
		format.go#L153: 	stdMask           = 1<<stdArgShift - 1 // mask out argument
		format.go#L440: 		return code | ((n & 0xfff) << stdArgShift)
		format.go#L442: 	return code | ((n & 0xfff) << stdArgShift) | 1<<stdSeparatorShift
		format.go#L446: 	return (std >> stdArgShift) & 0xfff