Programming Language

Nocter

A self-contained systems language built around simplicity, encapsulation, and foolproof design.

Documentation GitHub

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 impl 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 func start(user: User, clock: &Clock): Self {
        return Self {
            id: SessionId.new(),
            user: move user,
            expires_at: clock.now().plus_minutes(30),
        }
    }
}

func consume(values: Vec<String>): void! {
    for value in move values {
        print(&value as &str)?
    }
}

construct NonEmptyList<T> {
    pub literal [](...items: T): Self from items {
        var list = Self.new()

        for item in items {
            list.push(move item)
        }

        return move list
    }
}

/development/std/internal/hash/darwin.nct

darwin.nct

//! Darwin entropy adapter.

see ./index.nct

use /internal/os/darwin.{sys_getentropy, syscall2, trap}
use /ptr.{addr, from_ref_mut}

#target: "arm64-darwin"
/// Returns a fresh process-local seed or terminates when target entropy is unavailable.
func acquire_seed(): u64 {
    var value: u64 = 0
    let pointer = from_ref_mut(&+value)
    let result = syscall2(sys_getentropy, addr(pointer), 8)
    if result.errno != 0 {
        return trap()
    }
    return value
}