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
}

use std/io
use std/vec.Vec

struct Counter {
    value: i32
}

blocking func main(): i32! {
    var counters = Vec [Counter { value: 1 }, Counter { value: 2 }, Counter { value: 3 }]
    for counter in &+counters {
        counter.value += 10
    }

    var borrowed_total: i32 = 0
    for counter in &counters {
        borrowed_total += counter.value
    }

    var moved_total: i32 = 0
    for counter in move counters {
        moved_total += counter.value
    }

    let message = "borrowed: ${borrowed_total}, moved: ${moved_total}\n"
    io.print(&message)?
    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/task
use std/time
use std/time.Duration

async func delayed(value: i32): i32 {
    await time.sleep(Duration.from_milliseconds(1))
    return value
}

async func main(): i32! {
    let (left, right) = await task.join(delayed(20), delayed(22))
    if left + right != 42 {
        return error.new("example.unexpected_total", "joined tasks returned the wrong total")
    }
    return 0
}

use std/io
use std/url.Url

blocking func main(): i32! {
    let url = Url.parse("HTTP://Example.COM:80/a/../status?q=ready#fragment")?
    let canonical = url.to_string()
    let authority = url.authority()
    let target = url.request_target()
    io.println(&canonical)?
    io.println(&authority)?
    io.println(&target)?
    return 0
}

index.nct

//! Opaque cryptographic session identifiers without transport or storage policy.

see ./identifier.nct
see ./contracts.nct
see ./tests.nct

use /hash.Hash
use /order.TotalOrder
use /string.String

/// One opaque 256-bit session identifier.
pub copy struct SessionId

construct SessionId {
    /// Constructs an identifier from its exact 32-byte identity.
    pub noalloc func from_bytes(bytes: [u8; 32]): Self

    /// Parses one canonical URL-safe unpadded Base64 spelling.
    pub noalloc func parse(text: &str): Self?

    /// Issues an identifier from 32 bytes of operating-system cryptographic randomness.
    pub noalloc func issue(): Self!
}

instance SessionId {
    impl Hash
    impl TotalOrder

    /// Returns the exact 32-byte identity.
    pub noalloc method &self.bytes(): [u8; 32]

    /// Explicitly reveals the canonical transport spelling.
    pub method &self.reveal(): String

    /// Compares every identity byte.
    pub noalloc operator (&self == other: &Self): bool

    /// Orders identity bytes lexicographically.
    pub noalloc operator (&self < other: &Self): bool
}