id_effect 0.2.0

Effect<A, E, R> (sync + async), context/layers, pipe — interpreter-style, no bundled executor
Documentation 
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//! Ex 022 — `Get::<K>::get` reads the head cell.
use id_effect::{Get, ctx, service_key};

service_key!(struct K);

fn main() {
  let env = ctx!(K => "here");
  assert_eq!(*Get::<K>::get(&env), "here");
  println!("022_get_here ok");
}