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: 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),
        }
    }
}

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

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
    }
}

/examples/text-report/report/analysis.nct

analysis.nct

include ./index.nct

struct Report {
    lines: usize
    matching: usize
}

instance Report {
    method &self.lines(): usize {
        return self.lines
    }

    method &self.matching(): usize {
        return self.matching
    }
}

func analyze(text: &str, needle: &str): Report {
    var lines: usize = 0
    var matching: usize = 0
    for line in text.lines() {
        lines = lines + 1
        if line.contains(needle) {
            matching = matching + 1
        }
    }
    return Report {
        lines: lines,
        matching: matching,
    }
}