const time.stdMask

5 uses

	time (current package)
		format.go#L175: 	stdMask           = 1<<stdArgShift - 1 // mask out argument
		format.go#L513: 	trim := std&stdMask == stdFracSecond9
		format.go#L705: 		switch std & stdMask {
		format.go#L1090: 		switch std & stdMask {
		format.go#L1173: 				std &= stdMask