Netip.hextet: def of bend-kit-netip@0.1.0.0
Import: import bend-kit-netip@0.1.0.0/netip.bend as Netip
Lines 36-38 of bend-kit-netip@0.1.0.0/netip.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-netip@0.1.0.0/netip.bend&start_line=36&end_line=38

import Base

# One IPv6 group: 1 to 4 hex digits, either case.
def hextet(+s: String) -> Maybe<&2, U32>:
  hextet.ok(Bool.and(Bool.not(String.is_empty(s)), Nat.is_le(String.length(s), 4n)), s)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.is_empty
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-netip@0.1.0.0/netip.bend&name=hextet.ok