Function FOR_DISPATCH_2

library/cpp/iterator/ut/functools_ut.cpp:134–138

        for (auto& v : {a, b, c}) {
            size_t j = 0;
            FOR_DISPATCH_2(i, x, Enumerate(v)) {
                EXPECT_EQ(v[i], x);
                EXPECT_EQ(i, j++);
                EXPECT_LT(i, v.size());
            }
            EXPECT_EQ(j, v.size());
        }