Pkg.ver.ok: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/pkg/pkg.bend as Pkg
Lines 391-394 of ezx@1.11.0.0/src/pkg/pkg.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/pkg/pkg.bend&start_line=391&end_line=394

import Base

# a version: four numbers, like 1.0.0.0
def ver.ok(+text: String) -> Bool:
  +ps = String.split(text, '.')
  Bool.and(Nat.is_eq(List.length(&2, String, ps), 4n), ver.nums(ps))

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=Char
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.length
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.split
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/pkg/pkg.bend&name=ver.nums