Iota in golang

stay golang in , You can see iota A lot of use , But the readability of this thing is really not very good , It's good to use goland, Its specific value can be displayed .

such as ,Mutex In bag

const (
	mutexLocked      = 1 << iota // 1 << 0 equal 1
	mutexWoken                   // 1 << 1 equal 2
	mutexStarving                // 1 << 2 equal 4
	mutexWaiterShift = iota      // 3
)

<< For bit operations , Move left ,A << B It means that A Move left B position .