28 lines
894 B
JavaScript
28 lines
894 B
JavaScript
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var DESCRIPTORS = require('../internals/descriptors');
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var fails = require('../internals/fails');
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var has = require('../internals/has');
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var defineProperty = Object.defineProperty;
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var cache = {};
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var thrower = function (it) { throw it; };
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module.exports = function (METHOD_NAME, options) {
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if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];
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if (!options) options = {};
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var method = [][METHOD_NAME];
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var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;
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var argument0 = has(options, 0) ? options[0] : thrower;
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var argument1 = has(options, 1) ? options[1] : undefined;
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return cache[METHOD_NAME] = !!method && !fails(function () {
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if (ACCESSORS && !DESCRIPTORS) return true;
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var O = { length: -1 };
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if (ACCESSORS) defineProperty(O, 1, { enumerable: true, get: thrower });
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else O[1] = 1;
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method.call(O, argument0, argument1);
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});
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};
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