68 lines
1.8 KiB
JavaScript
68 lines
1.8 KiB
JavaScript
/**
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* Copyright 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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var KEYWORDS = [
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'break', 'do', 'in', 'typeof', 'case', 'else', 'instanceof', 'var', 'catch',
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'export', 'new', 'void', 'class', 'extends', 'return', 'while', 'const',
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'finally', 'super', 'with', 'continue', 'for', 'switch', 'yield', 'debugger',
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'function', 'this', 'default', 'if', 'throw', 'delete', 'import', 'try'
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];
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var FUTURE_RESERVED_WORDS = [
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'enum', 'await', 'implements', 'package', 'protected', 'static', 'interface',
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'private', 'public'
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];
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var LITERALS = [
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'null',
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'true',
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'false'
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];
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// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-reserved-words
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var RESERVED_WORDS = [].concat(
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KEYWORDS,
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FUTURE_RESERVED_WORDS,
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LITERALS
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);
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var reservedWordsMap = Object.create(null);
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RESERVED_WORDS.forEach(function(k) {
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reservedWordsMap[k] = true;
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});
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/**
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* This list should not grow as new reserved words are introdued. This list is
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* of words that need to be quoted because ES3-ish browsers do not allow their
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* use as identifier names.
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*/
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var ES3_FUTURE_RESERVED_WORDS = [
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'enum', 'implements', 'package', 'protected', 'static', 'interface',
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'private', 'public'
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];
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var ES3_RESERVED_WORDS = [].concat(
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KEYWORDS,
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ES3_FUTURE_RESERVED_WORDS,
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LITERALS
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);
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var es3ReservedWordsMap = Object.create(null);
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ES3_RESERVED_WORDS.forEach(function(k) {
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es3ReservedWordsMap[k] = true;
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});
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exports.isReservedWord = function(word) {
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return !!reservedWordsMap[word];
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};
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exports.isES3ReservedWord = function(word) {
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return !!es3ReservedWordsMap[word];
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};
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