// AnyOverlap reports whether x and y share memory at any (not necessarily // corresponding) index. The memory beyond the slice length is ignored. func AnyOverlap(x, y []byte) bool { … } // InexactOverlap reports whether x and y share memory at any non-corresponding // index. The memory beyond the slice length is ignored. Note that x and y can // have different lengths and still not have any inexact overlap. // // InexactOverlap can be used to implement the requirements of the crypto/cipher // AEAD, Block, BlockMode and Stream interfaces. func InexactOverlap(x, y []byte) bool { … }