Unicode.gcb: def of bend-kit-unicode@0.1.0.0
Import: import bend-kit-unicode@0.1.0.0/unicode.bend as Unicode
Lines 163-167 of bend-kit-unicode@0.1.0.0/unicode.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-unicode@0.1.0.0/unicode.bend&start_line=163&end_line=167

import Base
import bend-kit-unicode@0.1.0.0/tables.bend as T

# T.gb packs Grapheme_Cluster_Break in bits 0-3 (Other 0, CR 1, LF 2, Control 3, Extend 4,
# ZWJ 5, Regional_Indicator 6, Prepend 7, SpacingMark 8, L 9, V 10, T 11, LV 12, LVT 13),
# Extended_Pictographic in bit 4, and InCB in bits 5-6 (Consonant 1, Extend 2, Linker 3).
def gcb(+q: U32) -> U32:
  (q .&. 15 : U32)

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.and