Re.is_alpha: def of yaml-for-bend@0.1.1.0
Import: import yaml-for-bend@0.1.1.0/re.bend as Re
Lines 38-42 of yaml-for-bend@0.1.1.0/re.bend: https://jend.leeeet.dev/read.txt?path=yaml-for-bend@0.1.1.0/re.bend&start_line=38&end_line=42

import Base

# [[:alpha:]] as Onigmo reads it: ASCII letters, and letters past ASCII.
def is_alpha(+x: U32) -> Bool:
  Bool.or(Bool.or(between(x, 65, 90), between(x, 97, 122)),
    Bool.or(between(x, 170, 170), Bool.or(between(x, 181, 181), Bool.or(between(x, 186, 186),
      Bool.and(U32.is_ge(x, 192), Bool.and(Bool.not(U32.is_eq(x, 215)), Bool.not(U32.is_eq(x, 247))))))))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=Bool.or
  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=Base/base.bend&name=U32.is_ge
  https://jend.leeeet.dev/definition.txt?path=yaml-for-bend@0.1.1.0/re.bend&name=between