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23 lines
645 B
23 lines
645 B
var ITERATOR = require('./_wks')('iterator');
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var SAFE_CLOSING = false;
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try {
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var riter = [7][ITERATOR]();
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riter['return'] = function () { SAFE_CLOSING = true; };
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// eslint-disable-next-line no-throw-literal
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Array.from(riter, function () { throw 2; });
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} catch (e) { /* empty */ }
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module.exports = function (exec, skipClosing) {
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if (!skipClosing && !SAFE_CLOSING) return false;
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var safe = false;
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try {
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var arr = [7];
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var iter = arr[ITERATOR]();
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iter.next = function () { return { done: safe = true }; };
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arr[ITERATOR] = function () { return iter; };
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exec(arr);
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} catch (e) { /* empty */ }
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return safe;
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};
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