Async/Await

1async protocol fetch_data(id):
2    declare("Fetching data for", id)
3    sleep(100)  # Simulated delay
4    yield "User " + text(id)
5
6# Call implementation
7u := await fetch_data(42)
8declare("Result:", u)

1# Resolve immediately
2p := resolve("value")
3v := await p
4
5# Create promise from async function
6p_fetch := fetch_data(1) 
7# Now execute concurrently...
8another_task()
9# ...and await later
10res := await p_fetch

1defer(1000, declare, "Executed after 1s")
2declare("This prints first")