ChangeTick.valid_age: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/change_tick.bend as ChangeTick
Lines 60-63 of bendvy-ecs-core@0.1.0.3/change_tick.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/change_tick.bend&start_line=60&end_line=63

import Base

def valid_age(valid:Bool,stamp:Tick,this:Tick) -> U32:
  match valid stamp this:
    case False{} _ _:max_change_age()
    case True{} Tick{+se,sl} Tick{+te,tl}:distance(Nat.is_eq(se,te),Nat.is_eq(1n+se,te),sl,tl)

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  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=U32
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/change_tick.bend&name=Tick
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/change_tick.bend&name=distance
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/change_tick.bend&name=max_change_age