pkg issue79145, const Tau = 6.28319  // 314159265358979323846264338327950288419716939937510582097494459/50000000000000000000000000000000000000000000000000000000000000
pkg issue79145, const Tau ideal-float
pkg issue79145, const Old //deprecated
pkg issue79145, const Old = true
pkg issue79145, const Old ideal-bool
