View*[T] = object
  data*: pointer
  size*: int

ConstView*[T] = object
  data*: pointer
  size*: int

SomeView*[T] = View[T] | ConstView[T]

ByteView* = View[byte]

proc emptyView*[T](): View[T]

proc singleItemView*[T](item: var T): View[T]

proc seqView*[T](s: var seq[T]): View[T]

proc stringView*(s: var string): View[byte]

proc addrView*(s: cstring; size: int): View[byte]

proc asView*(s: var string): auto

proc asUnsafeView*(s: string): auto

proc asView*(s: var seq): auto

proc isNil*(v: View): bool

proc len*(v: View): int

proc len*(v: ConstView): int

proc asPointer*[T](v: SomeView[T]): ptr T

proc `[]`*[T](v: ConstView[T]; i: int): T

proc `[]`*[T](v: View[T]; i: int): var T

proc `[]=`*[T](v: View[T]; i: int; val: T)

proc slice*[T](v: SomeView[T]; start: int; size: int): SomeView[T]

proc slice*[T](v: SomeView[T]; start: int): SomeView[T]

proc copyFrom*[T](dst: View[T]; src: SomeView[T])

proc copyTo*[T](src: SomeView[T]; dst: View[T])

proc copyAsSeq*[T](src: ConstView[T]): seq[T]

proc copyAsString*(src: SomeView[byte]): string

proc copyAs*[R, T](src: SomeView[R]; t: typedesc[T]): T

proc `$`*[T](v: SomeView[T]): string

proc clearIfReferenceType*[T](view: SomeView[T])

proc alignedStringView*(s: var string; align = 16): ByteView

iterator items*[T](src: SomeView[T]): T

converter viewToConstView*[T](v: View[T]): ConstView[T]

template asByteView*(s): ByteView