Bugfix release that makes sequence_equal compatible with the product of the order_by operators. It should also fix other problems with order_by.

Bugfix for the 2.0 release that replaces coveo::enumerable<T>::const_iterator's class by a typedef for iterator. This fixes some generic code that doesn't handle well the fact that begin() and cbegin() are both const but return different types.

Several changes and bug fixes, including:

• Breaking change: coveo::enumerable now supports returning non-const references. This means that a coveo::enumerable<int> returns references to non-const ints. To return references to const objects, use something like coveo::enumerable<const int>.
• Optimized skip() and take(), including support for fast_size when possible.
• Breaking change: several operators now return values instead of references to avoid dangling references. This includes min(), max(), first(), etc.

coveo::enumerable has been refactored again. Having both iterator and const_iterator didn't make much sense since it was possible to simply copy the enumerable to access the non-const methods. So now enumerable only has an iterator, and begin/end are const methods. Also added an as_const method to return a const version of a given enumerable.

coveo::enumerable has been refactored to support returning non-const references. This means that a coveo::enumerable<int>'s iterators will return int& instead of const int&. coveo::enumerable now has two iterator types like most sequences, an iterator and a const_iterator. They work as expected, as well as begin()/cbegin()/end()/cend().

Please note that this is a breaking change. If you used coveo::enumerable in your interface and intended to return const references, you will have to update from coveo::enumerable<Foo> to coveo::enumerable<const Foo>.

Added cast operator.

First source release.