20. Standard Library

Namespace	Stability	Use when
`std`	Stable, backward-compatible	You need a guaranteed API
`soon`	Experimental, may change	You're prototyping and don't mind breakage
`c`	Direct C FFI bindings	You need to call C APIs

import std;
import soon;   // use with caution — API may shift
import c;       // raw C bindings

fn println(msg: []char): void;
fn print(msg: []char): void;
fn eprint(msg: []char): void;

@println("hello");

struct DynArray<T> {
    fn push(self: lend, val: T);
    fn pop(self): ?T;
    fn len(self): u64;
    fn get(self, index: u64): ?T;
}

struct File { ... }

fn open(path: string): File!;
fn read(self: view File): []u8!;
fn write(self: lend File, data: []u8): void!;

Trait	What it enables
`Copy`	Bitwise copy — primitives and components get this by default
`Clone`	`fn clone(self): Self!`
`Lent`	Can appear as a `lend` parameter
`Share`	Safe to share across threads