"use strict";

const consumable = require("./");

let singleUseValue = consumable(42);

console.log(singleUseValue.isSet());        // true
console.log(singleUseValue.peek());         // 42
console.log(singleUseValue.consume());      // 42
console.log(singleUseValue.peek());         // Throws!
console.log(singleUseValue.isSet());        // false

/* Now let's try with a different value, and using `replace`... */
singleUseValue.set(13);
console.log(singleUseValue.peek());         // 13
console.log(singleUseValue.replace(9001));  // 13
console.log(singleUseValue.peek());         // 9001

/* Note how it can distinguish between an explicitly-set `undefined`, and just nothing being set. */
singleUseValue.set(undefined);
console.log(singleUseValue.isSet());        // true
console.log(singleUseValue.peek());         // undefined
console.log(singleUseValue.consume());      // undefined
console.log(singleUseValue.isSet());        // false
console.log(singleUseValue.peek());         // Throws!
console.log(singleUseValue.consume());      // Throws!