source: imaps-frontend/node_modules/core-js/modules/es.symbol.description.js

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Last change on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 3 days ago

F4 Finalna Verzija

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Line 
1// `Symbol.prototype.description` getter
2// https://tc39.es/ecma262/#sec-symbol.prototype.description
3'use strict';
4var $ = require('../internals/export');
5var DESCRIPTORS = require('../internals/descriptors');
6var globalThis = require('../internals/global-this');
7var uncurryThis = require('../internals/function-uncurry-this');
8var hasOwn = require('../internals/has-own-property');
9var isCallable = require('../internals/is-callable');
10var isPrototypeOf = require('../internals/object-is-prototype-of');
11var toString = require('../internals/to-string');
12var defineBuiltInAccessor = require('../internals/define-built-in-accessor');
13var copyConstructorProperties = require('../internals/copy-constructor-properties');
14
15var NativeSymbol = globalThis.Symbol;
16var SymbolPrototype = NativeSymbol && NativeSymbol.prototype;
17
18if (DESCRIPTORS && isCallable(NativeSymbol) && (!('description' in SymbolPrototype) ||
19 // Safari 12 bug
20 NativeSymbol().description !== undefined
21)) {
22 var EmptyStringDescriptionStore = {};
23 // wrap Symbol constructor for correct work with undefined description
24 var SymbolWrapper = function Symbol() {
25 var description = arguments.length < 1 || arguments[0] === undefined ? undefined : toString(arguments[0]);
26 var result = isPrototypeOf(SymbolPrototype, this)
27 // eslint-disable-next-line sonarjs/inconsistent-function-call -- ok
28 ? new NativeSymbol(description)
29 // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
30 : description === undefined ? NativeSymbol() : NativeSymbol(description);
31 if (description === '') EmptyStringDescriptionStore[result] = true;
32 return result;
33 };
34
35 copyConstructorProperties(SymbolWrapper, NativeSymbol);
36 SymbolWrapper.prototype = SymbolPrototype;
37 SymbolPrototype.constructor = SymbolWrapper;
38
39 var NATIVE_SYMBOL = String(NativeSymbol('description detection')) === 'Symbol(description detection)';
40 var thisSymbolValue = uncurryThis(SymbolPrototype.valueOf);
41 var symbolDescriptiveString = uncurryThis(SymbolPrototype.toString);
42 var regexp = /^Symbol\((.*)\)[^)]+$/;
43 var replace = uncurryThis(''.replace);
44 var stringSlice = uncurryThis(''.slice);
45
46 defineBuiltInAccessor(SymbolPrototype, 'description', {
47 configurable: true,
48 get: function description() {
49 var symbol = thisSymbolValue(this);
50 if (hasOwn(EmptyStringDescriptionStore, symbol)) return '';
51 var string = symbolDescriptiveString(symbol);
52 var desc = NATIVE_SYMBOL ? stringSlice(string, 7, -1) : replace(string, regexp, '$1');
53 return desc === '' ? undefined : desc;
54 }
55 });
56
57 $({ global: true, constructor: true, forced: true }, {
58 Symbol: SymbolWrapper
59 });
60}
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