/* A comment
*/

// A comment

declare type numOrString = string | number

// A comment

declare type numOrString = string | number

const scores: int[]

"hello world"

function identity(arg: T): T {
   return arg;
}

class B {}
class A extends B {}

console.log("Hi")

// Typescript even supports splitting namespaces across multiple files:
// Validation.ts
namespace Validation {
    export interface StringValidator {
        isAcceptable(s: string): boolean;
    }
}
// LettersOnlyValidator.ts
/// 
namespace Validation {
    const lettersRegexp = /^[A-Za-z]+$/;
    export class LettersOnlyValidator implements StringValidator {
        isAcceptable(s: string) {
            return lettersRegexp.test(s);
        }
    }
}

// https://www.typescriptlang.org/docs/handbook/mixins.html
class SmartObject implements Disposable, Activatable {
}
// Note: still need to do some runtime ops to make that work.

// https://www.typescriptlang.org/docs/handbook/interfaces.html
interface SquareConfig {
   color?: string;
   width?: number;
}

import { ZipCodeValidator } from "./ZipCodeValidator";
/// 
/// 
import moo = module('moo');
/// 

something;

class Person {}

const result = true

function identity(arg: T): T {
   return arg;
}

abstract class Animal {}
class Dog extends Animal

class Person {
  private _age = 2
  public get age() {
    return _age
  }
  protected year = 1990
}

class Person {
  static sayHi() {
    console.log("Hello world")
  }
}

enum Direction {
 Up,
 Down
}