types

# Gemfile
gem 'dry-types'
gem 'dry-struct'

require 'dry-types'
require 'dry-struct'

// 1. Basic types
let username: string = 'Alex';
let age: number = 30;
let isActive: boolean = true;
let items: string[] = ['item1', 'item2'];
let numbers: Array<number> = [1, 2, 3];

export type PostId = string & { readonly brand: unique symbol }
export type UserId = string & { readonly brand: unique symbol }

export interface User {
  id: UserId
  name: string

fn print_size<T: ?Sized>(value: &T) {
    // Can accept both &str and &String
    println!("Value: {:p}", value as *const T as *const ());
}

fn main() {