aaac7fed
 liuqimichale
add
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"use strict";
var setPrototypeOf = require("es5-ext/object/set-prototype-of")
, d = require("d")
, Iterator = require("../")
, validIterable = require("../valid-iterable")
, push = Array.prototype.push
, defineProperties = Object.defineProperties
, IteratorChain;
IteratorChain = function (iterators) {
defineProperties(this, {
__iterators__: d("", iterators),
__current__: d("w", iterators.shift())
});
};
if (setPrototypeOf) setPrototypeOf(IteratorChain, Iterator);
IteratorChain.prototype = Object.create(Iterator.prototype, {
constructor: d(IteratorChain),
next: d(function () {
var result;
if (!this.__current__) return { done: true, value: undefined };
result = this.__current__.next();
while (result.done) {
this.__current__ = this.__iterators__.shift();
if (!this.__current__) return { done: true, value: undefined };
result = this.__current__.next();
}
return result;
})
});
module.exports = function () {
var iterators = [this];
push.apply(iterators, arguments);
iterators.forEach(validIterable);
return new IteratorChain(iterators);
};
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