54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
/* jshint newcap: false, freeze: false */
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var ensureSymbol = function (key) {
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Symbol[key] = Symbol[key] || Symbol(key);
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};
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var ensureProto = function (Constructor, key, val) {
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var proto = Constructor.prototype;
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if (!proto[key]) {
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Object.defineProperty(proto, key, {
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value: val
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});
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}
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};
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//
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if (typeof Symbol === "undefined") {
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require("es6-symbol/implement");
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var globSymbols = {};
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Symbol.for = function (key) {
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return globSymbols[key] = globSymbols[key] || Symbol(key);
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};
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Symbol.keyFor = function (sym) {
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return sym.__description__;
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};
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}
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require("es6-shim");
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require("./transformation/transformers/es6-generators/runtime");
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ensureSymbol("species");
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// Abstract references
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ensureSymbol("referenceGet");
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ensureSymbol("referenceSet");
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ensureSymbol("referenceDelete");
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ensureProto(Function, Symbol.referenceGet, function () { return this; });
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ensureProto(Map, Symbol.referenceGet, Map.prototype.get);
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ensureProto(Map, Symbol.referenceSet, Map.prototype.set);
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ensureProto(Map, Symbol.referenceDelete, Map.prototype.delete);
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if (global.WeakMap) {
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ensureProto(WeakMap, Symbol.referenceGet, WeakMap.prototype.get);
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ensureProto(WeakMap, Symbol.referenceSet, WeakMap.prototype.set);
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ensureProto(WeakMap, Symbol.referenceDelete, WeakMap.prototype.delete);
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}
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