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							- 'use strict';
 
- const codes = {};
 
- function createErrorType(code, message, Base) {
 
-   if (!Base) {
 
-     Base = Error
 
-   }
 
-   function getMessage (arg1, arg2, arg3) {
 
-     if (typeof message === 'string') {
 
-       return message
 
-     } else {
 
-       return message(arg1, arg2, arg3)
 
-     }
 
-   }
 
-   class NodeError extends Base {
 
-     constructor (arg1, arg2, arg3) {
 
-       super(getMessage(arg1, arg2, arg3));
 
-     }
 
-   }
 
-   NodeError.prototype.name = Base.name;
 
-   NodeError.prototype.code = code;
 
-   codes[code] = NodeError;
 
- }
 
- // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
 
- function oneOf(expected, thing) {
 
-   if (Array.isArray(expected)) {
 
-     const len = expected.length;
 
-     expected = expected.map((i) => String(i));
 
-     if (len > 2) {
 
-       return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
 
-              expected[len - 1];
 
-     } else if (len === 2) {
 
-       return `one of ${thing} ${expected[0]} or ${expected[1]}`;
 
-     } else {
 
-       return `of ${thing} ${expected[0]}`;
 
-     }
 
-   } else {
 
-     return `of ${thing} ${String(expected)}`;
 
-   }
 
- }
 
- // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
 
- function startsWith(str, search, pos) {
 
- 	return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
 
- }
 
- // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
 
- function endsWith(str, search, this_len) {
 
- 	if (this_len === undefined || this_len > str.length) {
 
- 		this_len = str.length;
 
- 	}
 
- 	return str.substring(this_len - search.length, this_len) === search;
 
- }
 
- // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
 
- function includes(str, search, start) {
 
-   if (typeof start !== 'number') {
 
-     start = 0;
 
-   }
 
-   if (start + search.length > str.length) {
 
-     return false;
 
-   } else {
 
-     return str.indexOf(search, start) !== -1;
 
-   }
 
- }
 
- createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
 
-   return 'The value "' + value + '" is invalid for option "' + name + '"'
 
- }, TypeError);
 
- createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
 
-   // determiner: 'must be' or 'must not be'
 
-   let determiner;
 
-   if (typeof expected === 'string' && startsWith(expected, 'not ')) {
 
-     determiner = 'must not be';
 
-     expected = expected.replace(/^not /, '');
 
-   } else {
 
-     determiner = 'must be';
 
-   }
 
-   let msg;
 
-   if (endsWith(name, ' argument')) {
 
-     // For cases like 'first argument'
 
-     msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
 
-   } else {
 
-     const type = includes(name, '.') ? 'property' : 'argument';
 
-     msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
 
-   }
 
-   msg += `. Received type ${typeof actual}`;
 
-   return msg;
 
- }, TypeError);
 
- createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
 
- createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
 
-   return 'The ' + name + ' method is not implemented'
 
- });
 
- createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
 
- createErrorType('ERR_STREAM_DESTROYED', function (name) {
 
-   return 'Cannot call ' + name + ' after a stream was destroyed';
 
- });
 
- createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
 
- createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
 
- createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
 
- createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
 
- createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
 
-   return 'Unknown encoding: ' + arg
 
- }, TypeError);
 
- createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
 
- module.exports.codes = codes;
 
 
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