var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack']; function Exception(message, node) { var loc = node && node.loc, line, column; if (loc) { line = loc.start.line; column = loc.start.column; message += ' - ' + line + ':' + column; } var tmp = Error.prototype.constructor.call(this, message); // Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work. for (var idx = 0; idx < errorProps.length; idx++) { this[errorProps[idx]] = tmp[errorProps[idx]]; } if (loc) { this.lineNumber = line; this.column = column; } } Exception.prototype = new Error(); export default Exception;