Programming Language

Nocter

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

Specification GitHub

use std/io

blocking func main(): i32! {
    io.print("Hello from Nocter\n")?
    return 0
}

func main(): i32 {
    let value = load_value() catch failure { fallback_for(failure.message()) }
    if value == 42 {
        return 0
    }
    return 1
}

func load_value(): i32! {
    return error.new("example.unavailable", "the primary value is unavailable")
}

func fallback_for(message: &str): i32 {
    return 42
}

use std/fmt.Format
use std/io

struct Point {
    x: i32
    y: i32
}

instance Point {
    impl Format
    method &self.try_format_into(output: &+String): void! {
        output.try_push_str("(")?
        self.x.try_format_into(output)?
        output.try_push_str(", ")?
        self.y.try_format_into(output)?
        output.try_push_str(")")?
        return
    }
}

blocking func main(): i32! {
    let point = Point { x: 3, y: 4 }
    let message = "point = ${point}\n"
    io.print(&message)?
    return 0
}

use std/io
use std/vec.Vec

struct Point {
    x: i32
    y: i32
}

instance Point {
    operator (&self == other: &Self): bool {
        return self.x == other.x && self.y == other.y
    }
}

blocking func main(): i32! {
    let first = Point { x: 3, y: 4 }
    let same = Point { x: 3, y: 4 }
    let other = Point { x: 5, y: 6 }
    if first != same || first == other {
        return 1
    }
    let points = Vec [move first, move other]
    if points[0] != same {
        return 1
    }
    var values = Vec [1, 2, 3]
    values[1] = 4
    if values[0] + values[1] + values[2] != 8 {
        return 1
    }
    io.print("equality found the point\n")?
    return 0
}

struct Buffer {
    values: [i32; 3]
}

instance Buffer {
    operator (&self[index: usize]): &i32 {
        return &self.values[index]
    }

    operator (&+self[index: usize]): &+i32 {
        return &+self.values[index]
    }
}

func at<C>(container: &C, index: usize): i32 where (&C[usize]): &i32 {
    return container[index]
}

func main(): i32 {
    var buffer = Buffer { values: [3, 4, 5] }
    buffer[1] = 9
    if at(&buffer, 1) != 9 {
        return 1
    }
    return 0
}

/examples/binary-record/application.nct

application.nct

see ./index.nct

use std/fs
use std/process
use std/vec.Vec

async func run(): i32 {
    let path = process.arg(1) catch _ { return 2 } otherwise { return 2 }

    let records: Vec<Record> = Vec [
        Record.new(42, 3.5),
        Record.new(7, -1.25),
    ]
    let encoded = encode_log(&records as &[Record]) catch _ { return 2 }
    await fs.write(path, &encoded as &[u8]) catch _ { return 2 }
    let stored = await fs.read(path) catch _ { return 2 }
    var fragmented = FragmentedBytes.new(&stored as &[u8], 2)
    let decoded = await decode_async(&+fragmented) catch _ { return 2 }
    match decoded.tail() {
        RecordTail.complete {
            if decoded.len() != 2 { return 2 }
        }
        _ { return 2 }
    }
    let last = decoded.record(1) otherwise { return 2 }
    if last.item_count() != 7 || last.measurement().to_bits() != 13831680355561635840 {
        return 2
    }
    return 0
}

async func main(): i32! {
    return await run()
}