const { match } = require('xmatch');

match(obj, [
	({ x }) => console.log('x', x),
	({ y }) => console.log('y', y),
	({ z }) => console.log('z', z),
	// Exhaustive match; will throw `xmatch.UnmatchedPatternError` unless uncommented:
	// other => console.error('Something else', other),
]);

const { match } = require('xmatch');

match(arr, [
	([]) => 'empty',
	([x]) => `x=${x}`,
	([x, y]) => `x=${x},y=${y}`,
	([x, y, ...{ length }]) => `x=${x},y=${y},rest.length=${length}`,
]);

const { match, guard } = require('xmatch');

match(obj, [
	({ command }) => {
		// When you want to match simple values:
		guard(command === 'ignore');
		/* Do nothing */
	},
	({ command }) => {
		// Or, say, match result of regex:
		let [, name, args] = guard(command.match(/^(\w+):(.*)$/));
		console.log({ name, args });
	},
	({ command }) => {
		throw new Error(`Invalid command: ${command}`);
	},
]);

const { guard } = require('xmatch');

const { x, y } = guard({ x: 1, y: 2 }); // OK
const { x, y } = guard({ x: 1, z: 2 }); // throws `xmatch.UnmatchedPatternError`