122   struct _Settings  struct
124     _AlgorithmStrategy          algorithm_strategy;
126     _SortAlgorithm              sort_algorithm;
127     _PartialSumAlgorithm        partial_sum_algorithm;
128     _MultiwayMergeAlgorithm     multiway_merge_algorithm;
129     _FindAlgorithm              find_algorithm;
131     _SplittingAlgorithm         sort_splitting;
132     _SplittingAlgorithm         merge_splitting;
133     _SplittingAlgorithm         multiway_merge_splitting;
138     _SequenceIndex              accumulate_minimal_n;
141     unsigned int                adjacent_difference_minimal_n;
144     _SequenceIndex              count_minimal_n;
147     _SequenceIndex              fill_minimal_n;
150     double                      find_increasing_factor;
153     _SequenceIndex              find_initial_block_size;
156     _SequenceIndex              find_maximum_block_size;
159     _SequenceIndex              find_sequential_search_size;
162     _SequenceIndex              for_each_minimal_n;
165     _SequenceIndex              generate_minimal_n;
168     _SequenceIndex              max_element_minimal_n;
171     _SequenceIndex              merge_minimal_n;
174     unsigned int                merge_oversampling;
177     _SequenceIndex              min_element_minimal_n;
180     _SequenceIndex              multiway_merge_minimal_n;
183     int                         multiway_merge_minimal_k;
186     unsigned int                multiway_merge_oversampling;
189     _SequenceIndex              nth_element_minimal_n;
192     _SequenceIndex              partition_chunk_size;
196     double                      partition_chunk_share;
199     _SequenceIndex              partition_minimal_n;
202     _SequenceIndex              partial_sort_minimal_n;
206     float                       partial_sum_dilation;
209     unsigned int                partial_sum_minimal_n;
212     unsigned int                random_shuffle_minimal_n;
215     _SequenceIndex              replace_minimal_n;
218     _SequenceIndex              set_difference_minimal_n;
221     _SequenceIndex              set_intersection_minimal_n;
224     _SequenceIndex              set_symmetric_difference_minimal_n;
227     _SequenceIndex              set_union_minimal_n;
230     _SequenceIndex              sort_minimal_n;
233     unsigned int                sort_mwms_oversampling;
236     unsigned int                sort_qs_num_samples_preset;
240     _SequenceIndex              sort_qsb_base_case_maximal_n;
243     _SequenceIndex              transform_minimal_n;
246     _SequenceIndex              unique_copy_minimal_n;
248     _SequenceIndex              workstealing_chunk_size;
253     unsigned long long          L1_cache_size;
278     _GLIBCXX_CONST static const _Settings&  argument
286     _Settings() :  in _Settings()  function