strslice.nim

template cut(s: string, left: Natural = 0, right: Natural = 0): string =
  s[left .. ^(right + 1)]

echo cut("Hello World", right = 6)
echo cut("Hello World", left = 6)
echo cut("Hello World", left = 4, right = 4)

#[
>nim c -r strslice.nim
Hint: used config file 'C:\Program Files\Nim\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Fredrik\AppData\Roaming\nim.cfg' [Conf]
Hint: system [Processing]
Hint: strslice [Processing]
strslice.nim(4, 9) Error: type mismatch: got (string, Slice[system.Natural])
but expected one of:
proc `[]`[Idx, T](a: array[Idx, T]; x: Slice[Idx]): seq[T]
proc `[]`(s: string; x: Slice[int]): string
proc `[]`[T](s: seq[T]; x: Slice[int]): seq[T]
proc `[]`[I: Ordinal, T](a: T; i: I): T
proc `[]`[Idx, T](a: array[Idx, T]; x: Slice[int]): seq[T]
]#