Json.u.class: def of bend-kit-json@0.7.0.0
Import: import bend-kit-json@0.7.0.0/json.bend as Json
Lines 331-333 of bend-kit-json@0.7.0.0/json.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-json@0.7.0.0/json.bend&start_line=331&end_line=333

import Base

# 0: not four hex digits; 1: high surrogate; 2: low surrogate; 3: other.
def u.class(+v: U32) -> U32:
  Bool.pick(U32, U32.is_eq(v, 65536), 0, Bool.pick(U32, is_hi(v), 1, Bool.pick(U32, is_lo(v), 2, 3)))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-kit-json@0.7.0.0/json.bend&name=is_hi
  https://jend.leeeet.dev/definition.txt?path=bend-kit-json@0.7.0.0/json.bend&name=is_lo