| 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var getBuiltIn = require('../internals/get-built-in');
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| 4 | var apply = require('../internals/function-apply');
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| 5 | var call = require('../internals/function-call');
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| 6 | var uncurryThis = require('../internals/function-uncurry-this');
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| 7 | var fails = require('../internals/fails');
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| 8 | var isArray = require('../internals/is-array');
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| 9 | var isCallable = require('../internals/is-callable');
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| 10 | var isRawJSON = require('../internals/is-raw-json');
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| 11 | var isSymbol = require('../internals/is-symbol');
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| 12 | var classof = require('../internals/classof-raw');
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| 13 | var toString = require('../internals/to-string');
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| 14 | var arraySlice = require('../internals/array-slice');
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| 15 | var parseJSONString = require('../internals/parse-json-string');
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| 16 | var uid = require('../internals/uid');
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| 17 | var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
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| 18 | var NATIVE_RAW_JSON = require('../internals/native-raw-json');
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| 19 |
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| 20 | var $String = String;
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| 21 | var $stringify = getBuiltIn('JSON', 'stringify');
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| 22 | var exec = uncurryThis(/./.exec);
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| 23 | var charAt = uncurryThis(''.charAt);
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| 24 | var charCodeAt = uncurryThis(''.charCodeAt);
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| 25 | var replace = uncurryThis(''.replace);
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| 26 | var slice = uncurryThis(''.slice);
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| 27 | var push = uncurryThis([].push);
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| 28 | var numberToString = uncurryThis(1.1.toString);
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| 29 |
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| 30 | var surrogates = /[\uD800-\uDFFF]/g;
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| 31 | var leadingSurrogates = /^[\uD800-\uDBFF]$/;
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| 32 | var trailingSurrogates = /^[\uDC00-\uDFFF]$/;
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| 33 |
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| 34 | var MARK = uid();
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| 35 | var MARK_LENGTH = MARK.length;
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| 36 |
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| 37 | var WRONG_SYMBOLS_CONVERSION = !NATIVE_SYMBOL || fails(function () {
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| 38 | var symbol = getBuiltIn('Symbol')('stringify detection');
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| 39 | // MS Edge converts symbol values to JSON as {}
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| 40 | return $stringify([symbol]) !== '[null]'
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| 41 | // WebKit converts symbol values to JSON as null
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| 42 | || $stringify({ a: symbol }) !== '{}'
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| 43 | // V8 throws on boxed symbols
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| 44 | || $stringify(Object(symbol)) !== '{}';
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| 45 | });
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| 46 |
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| 47 | // https://github.com/tc39/proposal-well-formed-stringify
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| 48 | var ILL_FORMED_UNICODE = fails(function () {
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| 49 | return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
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| 50 | || $stringify('\uDEAD') !== '"\\udead"';
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| 51 | });
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| 52 |
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| 53 | var stringifyWithProperSymbolsConversion = WRONG_SYMBOLS_CONVERSION ? function (it, replacer) {
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| 54 | var args = arraySlice(arguments);
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| 55 | var $replacer = getReplacerFunction(replacer);
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| 56 | if (!isCallable($replacer) && (it === undefined || isSymbol(it))) return; // IE8 returns string on undefined
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| 57 | args[1] = function (key, value) {
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| 58 | // some old implementations (like WebKit) could pass numbers as keys
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| 59 | if (isCallable($replacer)) value = call($replacer, this, $String(key), value);
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| 60 | if (!isSymbol(value)) return value;
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| 61 | };
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| 62 | return apply($stringify, null, args);
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| 63 | } : $stringify;
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| 64 |
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| 65 | var fixIllFormedJSON = function (match, offset, string) {
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| 66 | var prev = charAt(string, offset - 1);
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| 67 | var next = charAt(string, offset + 1);
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| 68 | if (
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| 69 | (exec(leadingSurrogates, match) && !exec(trailingSurrogates, next)) ||
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| 70 | (exec(trailingSurrogates, match) && !exec(leadingSurrogates, prev))
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| 71 | ) {
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| 72 | return '\\u' + numberToString(charCodeAt(match, 0), 16);
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| 73 | } return match;
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| 74 | };
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| 75 |
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| 76 | var getReplacerFunction = function (replacer) {
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| 77 | if (isCallable(replacer)) return replacer;
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| 78 | if (!isArray(replacer)) return;
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| 79 | var rawLength = replacer.length;
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| 80 | var keys = [];
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| 81 | for (var i = 0; i < rawLength; i++) {
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| 82 | var element = replacer[i];
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| 83 | if (typeof element == 'string') push(keys, element);
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| 84 | else if (typeof element == 'number' || classof(element) === 'Number' || classof(element) === 'String') push(keys, toString(element));
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| 85 | }
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| 86 | var keysLength = keys.length;
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| 87 | var root = true;
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| 88 | return function (key, value) {
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| 89 | if (root) {
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| 90 | root = false;
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| 91 | return value;
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| 92 | }
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| 93 | if (isArray(this)) return value;
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| 94 | for (var j = 0; j < keysLength; j++) if (keys[j] === key) return value;
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| 95 | };
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| 96 | };
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| 97 |
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| 98 | // `JSON.stringify` method
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| 99 | // https://tc39.es/ecma262/#sec-json.stringify
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| 100 | // https://github.com/tc39/proposal-json-parse-with-source
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| 101 | if ($stringify) $({ target: 'JSON', stat: true, arity: 3, forced: WRONG_SYMBOLS_CONVERSION || ILL_FORMED_UNICODE || !NATIVE_RAW_JSON }, {
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| 102 | stringify: function stringify(text, replacer, space) {
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| 103 | var replacerFunction = getReplacerFunction(replacer);
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| 104 | var rawStrings = [];
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| 105 |
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| 106 | var json = stringifyWithProperSymbolsConversion(text, function (key, value) {
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| 107 | // some old implementations (like WebKit) could pass numbers as keys
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| 108 | var v = isCallable(replacerFunction) ? call(replacerFunction, this, $String(key), value) : value;
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| 109 | return !NATIVE_RAW_JSON && isRawJSON(v) ? MARK + (push(rawStrings, v.rawJSON) - 1) : v;
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| 110 | }, space);
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| 111 |
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| 112 | if (typeof json != 'string') return json;
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| 113 |
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| 114 | if (ILL_FORMED_UNICODE) json = replace(json, surrogates, fixIllFormedJSON);
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| 115 |
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| 116 | if (NATIVE_RAW_JSON) return json;
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| 117 |
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| 118 | var result = '';
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| 119 | var length = json.length;
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| 120 |
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| 121 | for (var i = 0; i < length; i++) {
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| 122 | var chr = charAt(json, i);
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| 123 | if (chr === '"') {
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| 124 | var end = parseJSONString(json, ++i).end - 1;
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| 125 | var string = slice(json, i, end);
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| 126 | result += slice(string, 0, MARK_LENGTH) === MARK
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| 127 | ? rawStrings[slice(string, MARK_LENGTH)]
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| 128 | : '"' + string + '"';
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| 129 | i = end;
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| 130 | } else result += chr;
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| 131 | }
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| 132 |
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| 133 | return result;
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| 134 | }
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| 135 | });
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