1 | var toArray = require("./toArray");
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2 |
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3 | var toPropertyKey = require("./toPropertyKey");
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4 |
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5 | function _decorate(decorators, factory, superClass, mixins) {
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6 | var api = _getDecoratorsApi();
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7 |
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8 | if (mixins) {
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9 | for (var i = 0; i < mixins.length; i++) {
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10 | api = mixins[i](api);
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11 | }
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12 | }
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13 |
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14 | var r = factory(function initialize(O) {
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15 | api.initializeInstanceElements(O, decorated.elements);
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16 | }, superClass);
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17 | var decorated = api.decorateClass(_coalesceClassElements(r.d.map(_createElementDescriptor)), decorators);
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18 | api.initializeClassElements(r.F, decorated.elements);
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19 | return api.runClassFinishers(r.F, decorated.finishers);
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20 | }
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21 |
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22 | function _getDecoratorsApi() {
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23 | _getDecoratorsApi = function _getDecoratorsApi() {
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24 | return api;
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25 | };
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26 |
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27 | var api = {
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28 | elementsDefinitionOrder: [["method"], ["field"]],
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29 | initializeInstanceElements: function initializeInstanceElements(O, elements) {
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30 | ["method", "field"].forEach(function (kind) {
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31 | elements.forEach(function (element) {
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32 | if (element.kind === kind && element.placement === "own") {
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33 | this.defineClassElement(O, element);
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34 | }
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35 | }, this);
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36 | }, this);
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37 | },
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38 | initializeClassElements: function initializeClassElements(F, elements) {
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39 | var proto = F.prototype;
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40 | ["method", "field"].forEach(function (kind) {
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41 | elements.forEach(function (element) {
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42 | var placement = element.placement;
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43 |
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44 | if (element.kind === kind && (placement === "static" || placement === "prototype")) {
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45 | var receiver = placement === "static" ? F : proto;
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46 | this.defineClassElement(receiver, element);
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47 | }
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48 | }, this);
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49 | }, this);
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50 | },
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51 | defineClassElement: function defineClassElement(receiver, element) {
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52 | var descriptor = element.descriptor;
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53 |
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54 | if (element.kind === "field") {
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55 | var initializer = element.initializer;
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56 | descriptor = {
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57 | enumerable: descriptor.enumerable,
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58 | writable: descriptor.writable,
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59 | configurable: descriptor.configurable,
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60 | value: initializer === void 0 ? void 0 : initializer.call(receiver)
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61 | };
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62 | }
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63 |
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64 | Object.defineProperty(receiver, element.key, descriptor);
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65 | },
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66 | decorateClass: function decorateClass(elements, decorators) {
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67 | var newElements = [];
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68 | var finishers = [];
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69 | var placements = {
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70 | "static": [],
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71 | prototype: [],
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72 | own: []
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73 | };
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74 | elements.forEach(function (element) {
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75 | this.addElementPlacement(element, placements);
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76 | }, this);
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77 | elements.forEach(function (element) {
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78 | if (!_hasDecorators(element)) return newElements.push(element);
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79 | var elementFinishersExtras = this.decorateElement(element, placements);
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80 | newElements.push(elementFinishersExtras.element);
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81 | newElements.push.apply(newElements, elementFinishersExtras.extras);
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82 | finishers.push.apply(finishers, elementFinishersExtras.finishers);
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83 | }, this);
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84 |
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85 | if (!decorators) {
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86 | return {
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87 | elements: newElements,
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88 | finishers: finishers
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89 | };
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90 | }
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91 |
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92 | var result = this.decorateConstructor(newElements, decorators);
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93 | finishers.push.apply(finishers, result.finishers);
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94 | result.finishers = finishers;
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95 | return result;
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96 | },
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97 | addElementPlacement: function addElementPlacement(element, placements, silent) {
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98 | var keys = placements[element.placement];
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99 |
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100 | if (!silent && keys.indexOf(element.key) !== -1) {
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101 | throw new TypeError("Duplicated element (" + element.key + ")");
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102 | }
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103 |
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104 | keys.push(element.key);
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105 | },
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106 | decorateElement: function decorateElement(element, placements) {
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107 | var extras = [];
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108 | var finishers = [];
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109 |
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110 | for (var decorators = element.decorators, i = decorators.length - 1; i >= 0; i--) {
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111 | var keys = placements[element.placement];
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112 | keys.splice(keys.indexOf(element.key), 1);
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113 | var elementObject = this.fromElementDescriptor(element);
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114 | var elementFinisherExtras = this.toElementFinisherExtras((0, decorators[i])(elementObject) || elementObject);
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115 | element = elementFinisherExtras.element;
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116 | this.addElementPlacement(element, placements);
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117 |
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118 | if (elementFinisherExtras.finisher) {
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119 | finishers.push(elementFinisherExtras.finisher);
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120 | }
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121 |
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122 | var newExtras = elementFinisherExtras.extras;
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123 |
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124 | if (newExtras) {
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125 | for (var j = 0; j < newExtras.length; j++) {
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126 | this.addElementPlacement(newExtras[j], placements);
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127 | }
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128 |
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129 | extras.push.apply(extras, newExtras);
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130 | }
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131 | }
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132 |
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133 | return {
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134 | element: element,
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135 | finishers: finishers,
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136 | extras: extras
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137 | };
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138 | },
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139 | decorateConstructor: function decorateConstructor(elements, decorators) {
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140 | var finishers = [];
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141 |
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142 | for (var i = decorators.length - 1; i >= 0; i--) {
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143 | var obj = this.fromClassDescriptor(elements);
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144 | var elementsAndFinisher = this.toClassDescriptor((0, decorators[i])(obj) || obj);
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145 |
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146 | if (elementsAndFinisher.finisher !== undefined) {
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147 | finishers.push(elementsAndFinisher.finisher);
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148 | }
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149 |
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150 | if (elementsAndFinisher.elements !== undefined) {
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151 | elements = elementsAndFinisher.elements;
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152 |
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153 | for (var j = 0; j < elements.length - 1; j++) {
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154 | for (var k = j + 1; k < elements.length; k++) {
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155 | if (elements[j].key === elements[k].key && elements[j].placement === elements[k].placement) {
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156 | throw new TypeError("Duplicated element (" + elements[j].key + ")");
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157 | }
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158 | }
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159 | }
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160 | }
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161 | }
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162 |
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163 | return {
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164 | elements: elements,
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165 | finishers: finishers
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166 | };
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167 | },
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168 | fromElementDescriptor: function fromElementDescriptor(element) {
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169 | var obj = {
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170 | kind: element.kind,
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171 | key: element.key,
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172 | placement: element.placement,
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173 | descriptor: element.descriptor
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174 | };
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175 | var desc = {
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176 | value: "Descriptor",
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177 | configurable: true
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178 | };
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179 | Object.defineProperty(obj, Symbol.toStringTag, desc);
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180 | if (element.kind === "field") obj.initializer = element.initializer;
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181 | return obj;
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182 | },
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183 | toElementDescriptors: function toElementDescriptors(elementObjects) {
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184 | if (elementObjects === undefined) return;
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185 | return toArray(elementObjects).map(function (elementObject) {
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186 | var element = this.toElementDescriptor(elementObject);
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187 | this.disallowProperty(elementObject, "finisher", "An element descriptor");
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188 | this.disallowProperty(elementObject, "extras", "An element descriptor");
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189 | return element;
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190 | }, this);
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191 | },
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192 | toElementDescriptor: function toElementDescriptor(elementObject) {
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193 | var kind = String(elementObject.kind);
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194 |
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195 | if (kind !== "method" && kind !== "field") {
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196 | throw new TypeError('An element descriptor\'s .kind property must be either "method" or' + ' "field", but a decorator created an element descriptor with' + ' .kind "' + kind + '"');
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197 | }
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198 |
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199 | var key = toPropertyKey(elementObject.key);
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200 | var placement = String(elementObject.placement);
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201 |
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202 | if (placement !== "static" && placement !== "prototype" && placement !== "own") {
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203 | throw new TypeError('An element descriptor\'s .placement property must be one of "static",' + ' "prototype" or "own", but a decorator created an element descriptor' + ' with .placement "' + placement + '"');
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204 | }
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205 |
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206 | var descriptor = elementObject.descriptor;
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207 | this.disallowProperty(elementObject, "elements", "An element descriptor");
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208 | var element = {
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209 | kind: kind,
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210 | key: key,
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211 | placement: placement,
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212 | descriptor: Object.assign({}, descriptor)
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213 | };
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214 |
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215 | if (kind !== "field") {
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216 | this.disallowProperty(elementObject, "initializer", "A method descriptor");
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217 | } else {
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218 | this.disallowProperty(descriptor, "get", "The property descriptor of a field descriptor");
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219 | this.disallowProperty(descriptor, "set", "The property descriptor of a field descriptor");
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220 | this.disallowProperty(descriptor, "value", "The property descriptor of a field descriptor");
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221 | element.initializer = elementObject.initializer;
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222 | }
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223 |
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224 | return element;
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225 | },
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226 | toElementFinisherExtras: function toElementFinisherExtras(elementObject) {
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227 | var element = this.toElementDescriptor(elementObject);
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228 |
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229 | var finisher = _optionalCallableProperty(elementObject, "finisher");
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230 |
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231 | var extras = this.toElementDescriptors(elementObject.extras);
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232 | return {
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233 | element: element,
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234 | finisher: finisher,
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235 | extras: extras
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236 | };
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237 | },
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238 | fromClassDescriptor: function fromClassDescriptor(elements) {
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239 | var obj = {
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240 | kind: "class",
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241 | elements: elements.map(this.fromElementDescriptor, this)
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242 | };
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243 | var desc = {
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244 | value: "Descriptor",
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245 | configurable: true
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246 | };
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247 | Object.defineProperty(obj, Symbol.toStringTag, desc);
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248 | return obj;
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249 | },
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250 | toClassDescriptor: function toClassDescriptor(obj) {
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251 | var kind = String(obj.kind);
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252 |
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253 | if (kind !== "class") {
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254 | throw new TypeError('A class descriptor\'s .kind property must be "class", but a decorator' + ' created a class descriptor with .kind "' + kind + '"');
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255 | }
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256 |
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257 | this.disallowProperty(obj, "key", "A class descriptor");
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258 | this.disallowProperty(obj, "placement", "A class descriptor");
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259 | this.disallowProperty(obj, "descriptor", "A class descriptor");
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260 | this.disallowProperty(obj, "initializer", "A class descriptor");
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261 | this.disallowProperty(obj, "extras", "A class descriptor");
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262 |
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263 | var finisher = _optionalCallableProperty(obj, "finisher");
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264 |
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265 | var elements = this.toElementDescriptors(obj.elements);
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266 | return {
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267 | elements: elements,
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268 | finisher: finisher
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269 | };
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270 | },
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271 | runClassFinishers: function runClassFinishers(constructor, finishers) {
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272 | for (var i = 0; i < finishers.length; i++) {
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273 | var newConstructor = (0, finishers[i])(constructor);
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274 |
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275 | if (newConstructor !== undefined) {
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276 | if (typeof newConstructor !== "function") {
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277 | throw new TypeError("Finishers must return a constructor.");
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278 | }
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279 |
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280 | constructor = newConstructor;
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281 | }
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282 | }
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283 |
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284 | return constructor;
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285 | },
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286 | disallowProperty: function disallowProperty(obj, name, objectType) {
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287 | if (obj[name] !== undefined) {
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288 | throw new TypeError(objectType + " can't have a ." + name + " property.");
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289 | }
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290 | }
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291 | };
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292 | return api;
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293 | }
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294 |
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295 | function _createElementDescriptor(def) {
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296 | var key = toPropertyKey(def.key);
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297 | var descriptor;
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298 |
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299 | if (def.kind === "method") {
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300 | descriptor = {
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301 | value: def.value,
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302 | writable: true,
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303 | configurable: true,
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304 | enumerable: false
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305 | };
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306 | } else if (def.kind === "get") {
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307 | descriptor = {
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308 | get: def.value,
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309 | configurable: true,
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310 | enumerable: false
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311 | };
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312 | } else if (def.kind === "set") {
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313 | descriptor = {
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314 | set: def.value,
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315 | configurable: true,
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316 | enumerable: false
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317 | };
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318 | } else if (def.kind === "field") {
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319 | descriptor = {
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320 | configurable: true,
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321 | writable: true,
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322 | enumerable: true
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323 | };
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324 | }
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325 |
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326 | var element = {
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327 | kind: def.kind === "field" ? "field" : "method",
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328 | key: key,
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329 | placement: def["static"] ? "static" : def.kind === "field" ? "own" : "prototype",
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330 | descriptor: descriptor
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331 | };
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332 | if (def.decorators) element.decorators = def.decorators;
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333 | if (def.kind === "field") element.initializer = def.value;
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334 | return element;
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335 | }
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336 |
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337 | function _coalesceGetterSetter(element, other) {
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338 | if (element.descriptor.get !== undefined) {
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339 | other.descriptor.get = element.descriptor.get;
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340 | } else {
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341 | other.descriptor.set = element.descriptor.set;
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342 | }
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343 | }
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344 |
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345 | function _coalesceClassElements(elements) {
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346 | var newElements = [];
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347 |
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348 | var isSameElement = function isSameElement(other) {
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349 | return other.kind === "method" && other.key === element.key && other.placement === element.placement;
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350 | };
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351 |
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352 | for (var i = 0; i < elements.length; i++) {
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353 | var element = elements[i];
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354 | var other;
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355 |
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356 | if (element.kind === "method" && (other = newElements.find(isSameElement))) {
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357 | if (_isDataDescriptor(element.descriptor) || _isDataDescriptor(other.descriptor)) {
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358 | if (_hasDecorators(element) || _hasDecorators(other)) {
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359 | throw new ReferenceError("Duplicated methods (" + element.key + ") can't be decorated.");
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360 | }
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361 |
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362 | other.descriptor = element.descriptor;
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363 | } else {
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364 | if (_hasDecorators(element)) {
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365 | if (_hasDecorators(other)) {
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366 | throw new ReferenceError("Decorators can't be placed on different accessors with for " + "the same property (" + element.key + ").");
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367 | }
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368 |
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369 | other.decorators = element.decorators;
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370 | }
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371 |
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372 | _coalesceGetterSetter(element, other);
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373 | }
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374 | } else {
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375 | newElements.push(element);
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376 | }
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377 | }
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378 |
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379 | return newElements;
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380 | }
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381 |
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382 | function _hasDecorators(element) {
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383 | return element.decorators && element.decorators.length;
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384 | }
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385 |
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386 | function _isDataDescriptor(desc) {
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387 | return desc !== undefined && !(desc.value === undefined && desc.writable === undefined);
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388 | }
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389 |
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390 | function _optionalCallableProperty(obj, name) {
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391 | var value = obj[name];
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392 |
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393 | if (value !== undefined && typeof value !== "function") {
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394 | throw new TypeError("Expected '" + name + "' to be a function");
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395 | }
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396 |
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397 | return value;
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398 | }
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399 |
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400 | module.exports = _decorate; |
\ | No newline at end of file |