src/third_party/devtools/node_modules/es-abstract/es2018.js - cobalt - Git at Google

 'use strict';

 var GetIntrinsic = require('./GetIntrinsic');

 var keys = require('object-keys');
 var inspect = require('object-inspect');

 var ES2017 = require('./es2017');
 var assign = require('./helpers/assign');
 var forEach = require('./helpers/forEach');
 var callBind = require('./helpers/callBind');
 var every = require('./helpers/every');
 var isPrefixOf = require('./helpers/isPrefixOf');

 var $String = GetIntrinsic('%String%');
 var $TypeError = GetIntrinsic('%TypeError%');

 var callBound = require('./helpers/callBound');
 var regexTester = require('./helpers/regexTester');
 var $isNaN = require('./helpers/isNaN');

 var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true);
 // var $charAt = callBound('String.prototype.charAt');
 var $strSlice = callBound('String.prototype.slice');
 var $indexOf = callBound('String.prototype.indexOf');
 var $parseInt = parseInt;

 var isDigit = regexTester(/^[0-9]$/);

 var $PromiseResolve = callBound('Promise.resolve', true);

 var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
 var $pushApply = callBind.apply(GetIntrinsic('%Array.prototype.push%'));
 var $gOPS = $SymbolValueOf ? GetIntrinsic('%Object.getOwnPropertySymbols%') : null;

 var padTimeComponent = function padTimeComponent(c, count) {
 	return $strSlice('00' + c, -(count || 2));
 };

 var weekdays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
 var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

 var OwnPropertyKeys = function OwnPropertyKeys(ES, source) {
 	var ownKeys = keys(source);
 	if ($gOPS) {
 		$pushApply(ownKeys, $gOPS(source));
 	}
 	return ownKeys;
 };

 var ES2018 = assign(assign({}, ES2017), {
 	EnumerableOwnPropertyNames: ES2017.EnumerableOwnProperties,

 	// https://ecma-international.org/ecma-262/9.0/#sec-thissymbolvalue
 	thisSymbolValue: function thisSymbolValue(value) {
 		if (!$SymbolValueOf) {
 			throw new SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
 		}
 		if (this.Type(value) === 'Symbol') {
 			return value;
 		}
 		return $SymbolValueOf(value);
 	},

 	// https://www.ecma-international.org/ecma-262/9.0/#sec-isstringprefix
 	IsStringPrefix: function IsStringPrefix(p, q) {
 		if (this.Type(p) !== 'String') {
 			throw new TypeError('Assertion failed: "p" must be a String');
 		}

 		if (this.Type(q) !== 'String') {
 			throw new TypeError('Assertion failed: "q" must be a String');
 		}

 		return isPrefixOf(p, q);
 		/*
 		if (p === q || p === '') {
 			return true;
 		}

 		var pLength = p.length;
 		var qLength = q.length;
 		if (pLength >= qLength) {
 			return false;
 		}

 		// assert: pLength < qLength

 		for (var i = 0; i < pLength; i += 1) {
 			if ($charAt(p, i) !== $charAt(q, i)) {
 				return false;
 			}
 		}
 		return true;
 		*/
 	},

 	// https://www.ecma-international.org/ecma-262/9.0/#sec-tostring-applied-to-the-number-type
 	NumberToString: function NumberToString(m) {
 		if (this.Type(m) !== 'Number') {
 			throw new TypeError('Assertion failed: "m" must be a String');
 		}

 		return $String(m);
 	},

 	// https://www.ecma-international.org/ecma-262/9.0/#sec-copydataproperties
 	CopyDataProperties: function CopyDataProperties(target, source, excludedItems) {
 		if (this.Type(target) !== 'Object') {
 			throw new TypeError('Assertion failed: "target" must be an Object');
 		}

 		if (!this.IsArray(excludedItems)) {
 			throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
 		}
 		for (var i = 0; i < excludedItems.length; i += 1) {
 			if (!this.IsPropertyKey(excludedItems[i])) {
 				throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
 			}
 		}

 		if (typeof source === 'undefined' || source === null) {
 			return target;
 		}

 		var ES = this;

 		var fromObj = ES.ToObject(source);

 		var sourceKeys = OwnPropertyKeys(ES, fromObj);
 		forEach(sourceKeys, function (nextKey) {
 			var excluded = false;

 			forEach(excludedItems, function (e) {
 				if (ES.SameValue(e, nextKey) === true) {
 					excluded = true;
 				}
 			});

 			var enumerable = $isEnumerable(fromObj, nextKey) || (
 				// this is to handle string keys being non-enumerable in older engines
 				typeof source === 'string'
 				&& nextKey >= 0
 				&& ES.IsInteger(ES.ToNumber(nextKey))
 			);
 			if (excluded === false && enumerable) {
 				var propValue = ES.Get(fromObj, nextKey);
 				ES.CreateDataProperty(target, nextKey, propValue);
 			}
 		});

 		return target;
 	},

 	// https://ecma-international.org/ecma-262/9.0/#sec-promise-resolve
 	PromiseResolve: function PromiseResolve(C, x) {
 		if (!$PromiseResolve) {
 			throw new SyntaxError('This environment does not support Promises.');
 		}
 		return $PromiseResolve(C, x);
 	},

 	// http://www.ecma-international.org/ecma-262/9.0/#sec-getsubstitution
 	// eslint-disable-next-line max-statements, max-params, max-lines-per-function
 	GetSubstitution: function GetSubstitution(matched, str, position, captures, namedCaptures, replacement) {
 		if (this.Type(matched) !== 'String') {
 			throw new $TypeError('Assertion failed: `matched` must be a String');
 		}
 		var matchLength = matched.length;

 		if (this.Type(str) !== 'String') {
 			throw new $TypeError('Assertion failed: `str` must be a String');
 		}
 		var stringLength = str.length;

 		if (!this.IsInteger(position) || position < 0 || position > stringLength) {
 			throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, and less than or equal to the length of `string`, got ' + inspect(position));
 		}

 		var ES = this;
 		var isStringOrHole = function (capture, index, arr) { return ES.Type(capture) === 'String' || !(index in arr); };
 		if (!this.IsArray(captures) || !every(captures, isStringOrHole)) {
 			throw new $TypeError('Assertion failed: `captures` must be a List of Strings, got ' + inspect(captures));
 		}

 		if (this.Type(replacement) !== 'String') {
 			throw new $TypeError('Assertion failed: `replacement` must be a String');
 		}

 		var tailPos = position + matchLength;
 		var m = captures.length;
 		if (this.Type(namedCaptures) !== 'Undefined') {
 			namedCaptures = this.ToObject(namedCaptures); // eslint-disable-line no-param-reassign
 		}

 		var result = '';
 		for (var i = 0; i < replacement.length; i += 1) {
 			// if this is a $, and it's not the end of the replacement
 			var current = replacement[i];
 			var isLast = (i + 1) >= replacement.length;
 			var nextIsLast = (i + 2) >= replacement.length;
 			if (current === '$' && !isLast) {
 				var next = replacement[i + 1];
 				if (next === '$') {
 					result += '$';
 					i += 1;
 				} else if (next === '&') {
 					result += matched;
 					i += 1;
 				} else if (next === '`') {
 					result += position === 0 ? '' : $strSlice(str, 0, position - 1);
 					i += 1;
 				} else if (next === "'") {
 					result += tailPos >= stringLength ? '' : $strSlice(str, tailPos);
 					i += 1;
 				} else {
 					var nextNext = nextIsLast ? null : replacement[i + 2];
 					if (isDigit(next) && next !== '0' && (nextIsLast || !isDigit(nextNext))) {
 						// $1 through $9, and not followed by a digit
 						var n = $parseInt(next, 10);
 						// if (n > m, impl-defined)
 						result += (n <= m && this.Type(captures[n - 1]) === 'Undefined') ? '' : captures[n - 1];
 						i += 1;
 					} else if (isDigit(next) && (nextIsLast || isDigit(nextNext))) {
 						// $00 through $99
 						var nn = next + nextNext;
 						var nnI = $parseInt(nn, 10) - 1;
 						// if nn === '00' or nn > m, impl-defined
 						result += (nn <= m && this.Type(captures[nnI]) === 'Undefined') ? '' : captures[nnI];
 						i += 2;
 					} else if (next === '<') {
 						// eslint-disable-next-line max-depth
 						if (this.Type(namedCaptures) === 'Undefined') {
 							result += '$<';
 							i += 2;
 						} else {
 							var endIndex = $indexOf(replacement, '>', i);
 							// eslint-disable-next-line max-depth
 							if (endIndex > -1) {
 								var groupName = $strSlice(replacement, i, endIndex);
 								var capture = this.Get(namedCaptures, groupName);
 								// eslint-disable-next-line max-depth
 								if (this.Type(capture) !== 'Undefined') {
 									result += this.ToString(capture);
 								}
 								i += '$<' + groupName + '>'.length;
 							}
 						}
 					} else {
 						result += '$';
 					}
 				}
 			} else {
 				// the final $, or else not a $
 				result += replacement[i];
 			}
 		}
 		return result;
 	},

 	// https://www.ecma-international.org/ecma-262/9.0/#sec-datestring
 	DateString: function DateString(tv) {
 		if (this.Type(tv) !== 'Number' || $isNaN(tv)) {
 			throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
 		}
 		var weekday = weekdays[this.WeekDay(tv)];
 		var month = months[this.MonthFromTime(tv)];
 		var day = padTimeComponent(this.DateFromTime(tv));
 		var year = padTimeComponent(this.YearFromTime(tv), 4);
 		return weekday + '\x20' + month + '\x20' + day + '\x20' + year;
 	},

 	// https://www.ecma-international.org/ecma-262/9.0/#sec-timestring
 	TimeString: function TimeString(tv) {
 		if (this.Type(tv) !== 'Number' || $isNaN(tv)) {
 			throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
 		}
 		var hour = this.HourFromTime(tv);
 		var minute = this.MinFromTime(tv);
 		var second = this.SecFromTime(tv);
 		return padTimeComponent(hour) + ':' + padTimeComponent(minute) + ':' + padTimeComponent(second) + '\x20GMT';
 	}
 });

 delete ES2018.EnumerableOwnProperties; // replaced with EnumerableOwnPropertyNames

 delete ES2018.IsPropertyDescriptor; // not an actual abstract operation

 module.exports = ES2018;
	'use strict';

	var GetIntrinsic = require('./GetIntrinsic');

	var keys = require('object-keys');
	var inspect = require('object-inspect');

	var ES2017 = require('./es2017');
	var assign = require('./helpers/assign');
	var forEach = require('./helpers/forEach');
	var callBind = require('./helpers/callBind');
	var every = require('./helpers/every');
	var isPrefixOf = require('./helpers/isPrefixOf');

	var $String = GetIntrinsic('%String%');
	var $TypeError = GetIntrinsic('%TypeError%');

	var callBound = require('./helpers/callBound');
	var regexTester = require('./helpers/regexTester');
	var $isNaN = require('./helpers/isNaN');

	var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true);
	// var $charAt = callBound('String.prototype.charAt');
	var $strSlice = callBound('String.prototype.slice');
	var $indexOf = callBound('String.prototype.indexOf');
	var $parseInt = parseInt;

	var isDigit = regexTester(/^[0-9]$/);

	var $PromiseResolve = callBound('Promise.resolve', true);

	var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
	var $pushApply = callBind.apply(GetIntrinsic('%Array.prototype.push%'));
	var $gOPS = $SymbolValueOf ? GetIntrinsic('%Object.getOwnPropertySymbols%') : null;

	var padTimeComponent = function padTimeComponent(c, count) {
	return $strSlice('00' + c, -(count \|\| 2));
	};

	var weekdays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
	var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

	var OwnPropertyKeys = function OwnPropertyKeys(ES, source) {
	var ownKeys = keys(source);
	if ($gOPS) {
	$pushApply(ownKeys, $gOPS(source));
	}
	return ownKeys;
	};

	var ES2018 = assign(assign({}, ES2017), {
	EnumerableOwnPropertyNames: ES2017.EnumerableOwnProperties,

	// https://ecma-international.org/ecma-262/9.0/#sec-thissymbolvalue
	thisSymbolValue: function thisSymbolValue(value) {
	if (!$SymbolValueOf) {
	throw new SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
	}
	if (this.Type(value) === 'Symbol') {
	return value;
	}
	return $SymbolValueOf(value);
	},

	// https://www.ecma-international.org/ecma-262/9.0/#sec-isstringprefix
	IsStringPrefix: function IsStringPrefix(p, q) {
	if (this.Type(p) !== 'String') {
	throw new TypeError('Assertion failed: "p" must be a String');
	}

	if (this.Type(q) !== 'String') {
	throw new TypeError('Assertion failed: "q" must be a String');
	}

	return isPrefixOf(p, q);
	/*
	if (p === q \|\| p === '') {
	return true;
	}

	var pLength = p.length;
	var qLength = q.length;
	if (pLength >= qLength) {
	return false;
	}

	// assert: pLength < qLength

	for (var i = 0; i < pLength; i += 1) {
	if ($charAt(p, i) !== $charAt(q, i)) {
	return false;
	}
	}
	return true;
	*/
	},

	// https://www.ecma-international.org/ecma-262/9.0/#sec-tostring-applied-to-the-number-type
	NumberToString: function NumberToString(m) {
	if (this.Type(m) !== 'Number') {
	throw new TypeError('Assertion failed: "m" must be a String');
	}

	return $String(m);
	},

	// https://www.ecma-international.org/ecma-262/9.0/#sec-copydataproperties
	CopyDataProperties: function CopyDataProperties(target, source, excludedItems) {
	if (this.Type(target) !== 'Object') {
	throw new TypeError('Assertion failed: "target" must be an Object');
	}

	if (!this.IsArray(excludedItems)) {
	throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
	}
	for (var i = 0; i < excludedItems.length; i += 1) {
	if (!this.IsPropertyKey(excludedItems[i])) {
	throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
	}
	}

	if (typeof source === 'undefined' \|\| source === null) {
	return target;
	}

	var ES = this;

	var fromObj = ES.ToObject(source);

	var sourceKeys = OwnPropertyKeys(ES, fromObj);
	forEach(sourceKeys, function (nextKey) {
	var excluded = false;

	forEach(excludedItems, function (e) {
	if (ES.SameValue(e, nextKey) === true) {
	excluded = true;
	}
	});

	var enumerable = $isEnumerable(fromObj, nextKey) \|\| (
	// this is to handle string keys being non-enumerable in older engines
	typeof source === 'string'
	&& nextKey >= 0
	&& ES.IsInteger(ES.ToNumber(nextKey))
	);
	if (excluded === false && enumerable) {
	var propValue = ES.Get(fromObj, nextKey);
	ES.CreateDataProperty(target, nextKey, propValue);
	}
	});

	return target;
	},

	// https://ecma-international.org/ecma-262/9.0/#sec-promise-resolve
	PromiseResolve: function PromiseResolve(C, x) {
	if (!$PromiseResolve) {
	throw new SyntaxError('This environment does not support Promises.');
	}
	return $PromiseResolve(C, x);
	},

	// http://www.ecma-international.org/ecma-262/9.0/#sec-getsubstitution
	// eslint-disable-next-line max-statements, max-params, max-lines-per-function
	GetSubstitution: function GetSubstitution(matched, str, position, captures, namedCaptures, replacement) {
	if (this.Type(matched) !== 'String') {
	throw new $TypeError('Assertion failed: `matched` must be a String');
	}
	var matchLength = matched.length;

	if (this.Type(str) !== 'String') {
	throw new $TypeError('Assertion failed: `str` must be a String');
	}
	var stringLength = str.length;

	if (!this.IsInteger(position) \|\| position < 0 \|\| position > stringLength) {
	throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, and less than or equal to the length of `string`, got ' + inspect(position));
	}

	var ES = this;
	var isStringOrHole = function (capture, index, arr) { return ES.Type(capture) === 'String' \|\| !(index in arr); };
	if (!this.IsArray(captures) \|\| !every(captures, isStringOrHole)) {
	throw new $TypeError('Assertion failed: `captures` must be a List of Strings, got ' + inspect(captures));
	}

	if (this.Type(replacement) !== 'String') {
	throw new $TypeError('Assertion failed: `replacement` must be a String');
	}

	var tailPos = position + matchLength;
	var m = captures.length;
	if (this.Type(namedCaptures) !== 'Undefined') {
	namedCaptures = this.ToObject(namedCaptures); // eslint-disable-line no-param-reassign
	}

	var result = '';
	for (var i = 0; i < replacement.length; i += 1) {
	// if this is a $, and it's not the end of the replacement
	var current = replacement[i];
	var isLast = (i + 1) >= replacement.length;
	var nextIsLast = (i + 2) >= replacement.length;
	if (current === '$' && !isLast) {
	var next = replacement[i + 1];
	if (next === '$') {
	result += '$';
	i += 1;
	} else if (next === '&') {
	result += matched;
	i += 1;
	} else if (next === '`') {
	result += position === 0 ? '' : $strSlice(str, 0, position - 1);
	i += 1;
	} else if (next === "'") {
	result += tailPos >= stringLength ? '' : $strSlice(str, tailPos);
	i += 1;
	} else {
	var nextNext = nextIsLast ? null : replacement[i + 2];
	if (isDigit(next) && next !== '0' && (nextIsLast \|\| !isDigit(nextNext))) {
	// $1 through $9, and not followed by a digit
	var n = $parseInt(next, 10);
	// if (n > m, impl-defined)
	result += (n <= m && this.Type(captures[n - 1]) === 'Undefined') ? '' : captures[n - 1];
	i += 1;
	} else if (isDigit(next) && (nextIsLast \|\| isDigit(nextNext))) {
	// $00 through $99
	var nn = next + nextNext;
	var nnI = $parseInt(nn, 10) - 1;
	// if nn === '00' or nn > m, impl-defined
	result += (nn <= m && this.Type(captures[nnI]) === 'Undefined') ? '' : captures[nnI];
	i += 2;
	} else if (next === '<') {
	// eslint-disable-next-line max-depth
	if (this.Type(namedCaptures) === 'Undefined') {
	result += '$<';
	i += 2;
	} else {
	var endIndex = $indexOf(replacement, '>', i);
	// eslint-disable-next-line max-depth
	if (endIndex > -1) {
	var groupName = $strSlice(replacement, i, endIndex);
	var capture = this.Get(namedCaptures, groupName);
	// eslint-disable-next-line max-depth
	if (this.Type(capture) !== 'Undefined') {
	result += this.ToString(capture);
	}
	i += '$<' + groupName + '>'.length;
	}
	}
	} else {
	result += '$';
	}
	}
	} else {
	// the final $, or else not a $
	result += replacement[i];
	}
	}
	return result;
	},

	// https://www.ecma-international.org/ecma-262/9.0/#sec-datestring
	DateString: function DateString(tv) {
	if (this.Type(tv) !== 'Number' \|\| $isNaN(tv)) {
	throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
	}
	var weekday = weekdays[this.WeekDay(tv)];
	var month = months[this.MonthFromTime(tv)];
	var day = padTimeComponent(this.DateFromTime(tv));
	var year = padTimeComponent(this.YearFromTime(tv), 4);
	return weekday + '\x20' + month + '\x20' + day + '\x20' + year;
	},

	// https://www.ecma-international.org/ecma-262/9.0/#sec-timestring
	TimeString: function TimeString(tv) {
	if (this.Type(tv) !== 'Number' \|\| $isNaN(tv)) {
	throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
	}
	var hour = this.HourFromTime(tv);
	var minute = this.MinFromTime(tv);
	var second = this.SecFromTime(tv);
	return padTimeComponent(hour) + ':' + padTimeComponent(minute) + ':' + padTimeComponent(second) + '\x20GMT';
	}
	});

	delete ES2018.EnumerableOwnProperties; // replaced with EnumerableOwnPropertyNames

	delete ES2018.IsPropertyDescriptor; // not an actual abstract operation

	module.exports = ES2018;