Proposal Details

This will be the inverse of #46505

Usually, you can use array[:] to create a slice from array. However this will not work if array is the return value of a function call (which is unaddressable). For example md5.Sum returns a [16]byte but hex.EncodeToString requires a []byte. Make [16]byte conversible to []byte will allow people to call hex.EncodeToString with result of md5.Sum without assigning the result to an immediate variable:

fmt.Println(hex.EncodeToString([]byte(md5.Sum([]byte("test"))))) // this is currently invalid

Proposed: if array is addressable, converting it to slice equals to array[:]. Otherwise the value of array is assigned to a new temporary variable x and x[:] is returned.