use std/io.print func greet(user: User): void! { let name = user.display.name() otherwise { "guest" } let tone = match user.presence { Presence.online { "hello" } Presence.away { "welcome back" } } print("${tone}, ${name}\n")? }

interface Writer { pub method &+self.write(bytes: &[u8]): void! } func save_log<W>(output: &+W, events: &[Event]): void! where W: Writer { for event in events { output.write(event.message().bytes())? output.write("\n".bytes())? } }

pub struct Session { id: SessionId user: User expires_at: Time } construct Session { pub default func start(user: User, clock: &Clock): Self { return Self { id: SessionId.new(), user: move user, expires_at: clock.now().plus_minutes(30), } } }

construct NonEmptyList<T> { pub default literal [](...items: T): Self from items { var list = Self.new() for item in items { list.push(move item) } return move list } }

index.nct

//! Package-internal target path argument encoding.
//!
//! This module depends on ordinary memory and UTF-8 path contracts. Raw OS
//! facts stay in `std/internal/os`, which never imports this higher layer.

see ./darwin.nct

/// Owned temporary path storage in the active target's native argument representation.
#target: "arm64-darwin"
pub(/) struct TargetPathArgument

#target: "arm64-darwin"
pub(/) func target_path_argument(value: &str): TargetPathArgument!

#target: "arm64-darwin"
pub(/) func target_path_address(value: &TargetPathArgument): usize