webpack/lib/AbstractMethodError.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Ivan Kopeykin @vankop
*/

"use strict";

const WebpackError = require("./WebpackError");
const CURRENT_METHOD_REGEXP = /at ([a-zA-Z0-9_.]*)/;

/**
 * @param {string=} method method name
 * @returns {string} message
 */
function createMessage(method) {
	return `Abstract method${method ? " " + method : ""}. Must be overridden.`;
}

/**
 * @constructor
 */
function Message() {
	/** @type {string} */
	this.stack = undefined;
	Error.captureStackTrace(this);
	/** @type {RegExpMatchArray} */
	const match = this.stack.split("\n")[3].match(CURRENT_METHOD_REGEXP);

	this.message = match && match[1] ? createMessage(match[1]) : createMessage();
}

/**
 * Error for abstract method
 * @example
 * class FooClass {
 *     abstractMethod() {
 *         throw new AbstractMethodError(); // error message: Abstract method FooClass.abstractMethod. Must be overridden.
 *     }
 * }
 *
 */
class AbstractMethodError extends WebpackError {
	constructor() {
		super(new Message().message);
		this.name = "AbstractMethodError";
	}
}

module.exports = AbstractMethodError;