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LUCENENET-469 - enumerables #212

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commented Aug 14, 2017

See for background.

This is an early stage proposal for implementing IEnumerable on various "Enum" types. To enable foreach and linq style operators.

This prototype provides EnumEnumerator<T> as a helper. It can be used in various ways to make the implementation of IEnumerable<T> more straightforward.

I have modified IBytesRefIterator and TermsEnum to add IEnumerable<BytesRef> and therefore to all of it's descendants.

The test (such as it is) demonstrates retrieving a TermsEnum from a reader. Then using foreach and a simple .Count() linq operator.

If this approach is acceptable it ought to be adaptable to other Enum types

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