generators-2.js - mozsearch

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// Generator-iterators are consumed the first time they are iterated.

function* range(n) {

    for (var i = 0; i < n; i++)

        yield i;

var r = range(10);

var i = 0;

for (var x of r)

    assertEq(x, i++);

assertEq(i, 10);

for (var y of r)

    throw "FAIL";

assertEq(y, undefined);