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* Implementing HASH node `remove_key` functionKatharina Fey2019-07-141-0/+12
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* Adding initial support for HASH nodesKatharina Fey2019-07-131-0/+73
This PR adds initial support for HASH data nodes in libbowl. This allows a performant key-value store lookup in a node tree. The hashing code implements the "murmur" hash, which has shown good performance over at [`libcuckoo`]. Currently there is no extended hashing strategy, which should definitely be changed. [`libcuckoo`]: https://github.com/qaul/libcuckoo (currently a collision will cause a recursive re-alloc) Some of the type-level hacks also begs the question if a PAIR data node might be warranted, even though it would break the simple design around bowl->data.