Lex.classify.go: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/syntax/lex.bend as Lex
Lines 99-123 of bolt@1.27.0.0/src/syntax/lex.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&start_line=99&end_line=123

import Base

# the class of a code point, given the class any other character would get.
# Written as comparisons rather than as `case '.':` arms: a character literal
# in a pattern is a U32 literal inside a constructor pattern, and bend's C
# backend pays about 90 MB for each one -- these eighteen cost 1.57 GB as
# literal arms and 0.10 GB written this way.
def classify.go(+xx: U32, other: Class) -> Class:
  Bool.pick(Class, U32.is_eq(xx, 46), CDot{},  # '.'
  Bool.pick(Class, U32.is_eq(xx, 34), CQuote{},  # '"'
  Bool.pick(Class, U32.is_eq(xx, 39), CTick{},  # '\''
  Bool.pick(Class, U32.is_eq(xx, 92), CBack{},  # '\\'
  Bool.pick(Class, U32.is_eq(xx, 35), CHash{},  # '#'
  Bool.pick(Class, U32.is_eq(xx, 32), CSpace{},  # ' '
  Bool.pick(Class, U32.is_eq(xx, 9), CSpace{},  # '\t'
  Bool.pick(Class, U32.is_eq(xx, 13), CSpace{},  # '\r'
  Bool.pick(Class, U32.is_eq(xx, 10), CNewline{},  # '\n'
  Bool.pick(Class, U32.is_eq(xx, 58), CColon{},  # ':'
  Bool.pick(Class, U32.is_eq(xx, 44), CComma{},  # ','
  Bool.pick(Class, U32.is_eq(xx, 40), COpen{},  # '('
  Bool.pick(Class, U32.is_eq(xx, 91), COpen{},  # '['
  Bool.pick(Class, U32.is_eq(xx, 123), COpen{},  # '{'
  Bool.pick(Class, U32.is_eq(xx, 41), CClose{},  # ')'
  Bool.pick(Class, U32.is_eq(xx, 93), CClose{},  # ']'
  Bool.pick(Class, U32.is_eq(xx, 125), CClose{},  # '}'
  Bool.pick(Class, U32.is_eq(xx, 95), CAlpha{},  # '_'
    other))))))))))))))))))

Uses (4):
  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=bolt@1.27.0.0/src/syntax/lex.bend&name=Class