| /* |

| * Licensed to the Apache Software Foundation (ASF) under one |

| * or more contributor license agreements. See the NOTICE file |

| * distributed with this work for additional information |

| * regarding copyright ownership. The ASF licenses this file |

| * to you under the Apache License, Version 2.0 (the |

| * "License"); you may not use this file except in compliance |

| * with the License. You may obtain a copy of the License at |

| * |

| * http://www.apache.org/licenses/LICENSE-2.0 |

| * |

| * Unless required by applicable law or agreed to in writing, |

| * software distributed under the License is distributed on an |

| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |

| * KIND, either express or implied. See the License for the |

| * specific language governing permissions and limitations |

| * under the License. |

| */ |

| |

| #ifndef TUPLE_A_NOT_B_HPP_ |

| #define TUPLE_A_NOT_B_HPP_ |

| |

| #include "tuple_sketch.hpp" |

| #include "theta_set_difference_base.hpp" |

| |

| namespace datasketches { |

| |

| template< |

| typename Summary, |

| typename Allocator = std::allocator<Summary> |

| > |

| class tuple_a_not_b { |

| public: |

| using Entry = std::pair<uint64_t, Summary>; |

| using ExtractKey = pair_extract_key<uint64_t, Summary>; |

| using CompactSketch = compact_tuple_sketch<Summary, Allocator>; |

| using AllocEntry = typename std::allocator_traits<Allocator>::template rebind_alloc<Entry>; |

| using State = theta_set_difference_base<Entry, ExtractKey, CompactSketch, AllocEntry>; |

| |

| explicit tuple_a_not_b(uint64_t seed = DEFAULT_SEED, const Allocator& allocator = Allocator()); |

| |

| /** |

| * Computes the a-not-b set operation given two sketches. |

| * @return the result of a-not-b |

| */ |

| template<typename FwdSketch, typename Sketch> |

| CompactSketch compute(FwdSketch&& a, const Sketch& b, bool ordered = true) const; |

| |

| private: |

| State state_; |

| }; |

| |

| } /* namespace datasketches */ |

| |

| #include "tuple_a_not_b_impl.hpp" |

| |

| #endif |