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360 :1511

	English erase_if by Key 15/10000 · 15
361 :1512

	English ```c++ template<class F> size_type erase_if(const key_type& k, F f); template<class K, class F> size_type erase_if(const K& k, F f); ``` 136/10000 · 136
362 :1517

	English Erases the element `x` with key equivalent to `k` if it exists and `f(x)` is `true`. 84/10000 · 84
363 :1520

	English Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher`, `key_equal` or `f`. Notes:;; `f` is passed a non-const reference to `x`. + + The `template<class K, class F>` overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `false`. + + The `template<class K, class F>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. 727/10000 · 727
:1528 :1528

	English --- 3/10000 · 3
:1530 :1530

	English erase_if 8/10000 · 8
366 :1531

	English ```c++ template<class F> size_type erase_if(F f); ``` 53/10000 · 53
367 :1535

	English Successively invokes `f` with non-const references to each of the elements in the table, and erases those for which `f` returns `true`. 135/10000 · 135
368 :1538

	English Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by `f`. 100/10000 · 100
:1541 :1541

	English --- 3/10000 · 3
370 :1543

	English Parallel erase_if 17/10000 · 17
371 :1544

	English ```c++ template<class ExecutionPolicy, class F> void erase_if(ExecutionPolicy&& policy, F f); ``` 98/10000 · 98
372 :1548

	English Invokes `f` with non-const references to each of the elements in the table, and erases those for which `f` returns `true`. Execution is parallelized according to the semantics of the execution policy specified. 210/10000 · 210
373 :1552

	English Throws:;; Depending on the exception handling mechanism of the execution policy used, may call `std::terminate` if an exception is thrown within `f`. Notes:;; Only available in compilers supporting C++17 parallel algorithms. + + This overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `true`. + + Unsequenced execution policies are not allowed. 416/10000 · 416
:1559 :1559

	English --- 3/10000 · 3
375 :1561

	English swap 4/10000 · 4
376 :1562

	English ```c++ void swap(concurrent_node_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ``` 192/10000 · 192
377 :1568

	English Swaps the contents of the table with the parameter. 51/10000 · 51
378 :1570

	English If `Allocator::propagate_on_container_swap` is declared and `Allocator::propagate_on_container_swap::value` is `true` then the tables' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior. 233/10000 · 233
379 :1573

	English Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping. Concurrency:;; Blocking on `*this` and `other`. 115/10000 · 115

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