use math.{pi, sqrt}
use math as m
use random.{Pcg32, pcg32, draw_u32}
use time.{Duration, TimeError, duration_neg}
use time as t

circle: f64: pi
root: f64: 4.0->sqrt
# Host overloads are selected by the operand, so the literal is typed first.
nine: f32: 9.0
qualified_root: f32: nine->m.sqrt
qualified_pi: f32: m.pi

seed: u64: 42
generator: Pcg32: seed->pcg32
draw: u32: generator->draw_u32

negate: Duration => Duration ! TimeError: duration_neg
qualified_negate: t.Duration => t.Duration ! t.TimeError: t.duration_neg