Iterator range

[chrisdembia]

This PR adds a helper class that allows using range-based for loops with a pair of iterators:

std::vector<int> v {5, 10, 15, 20};
auto first = std::lower_bound(v.begin(), v.end(), 10);
auto last = std::upper_bound(v.begin(), v.end(), 15);
for (auto& x : makeIteratorRange(first, last)) {
    ...
}

[sherm1]

just 2016 here since the code is all new

[chrisdembia]

Addressed.

[sherm1]

I like this! Thanks for making it a separate header.

P.S. You should always provide a description for your PRs. This one doesn't have one.

[sherm1]

Needs a changelog mention.

[sherm1]

Thanks for adding the description. Should it say makeIteratorRange rather than just IteratorRange?

[chrisdembia]

Should it say makeIteratorRange rather than just IteratorRange?

Yes; I fixed it.

[chrisdembia]

Ready for review again.

[chrisdembia]

Ready for review again.

[sherm1]

Beautiful -- thanks for adding the test program!