std::discrete_distribution<IntType>::reset – std::discrete_distribution<IntType>::reset Synopsis void reset(); (since C++ 11) Resets the internal state of the distribution object. After a call to this function, the next call to operator() on the distribution object will not be dependent on previous calls to operator(). Parameters (none) Return value (none) Complexity Constant.
std::discrete_distribution<IntType>::probabilities – std::discrete_distribution<IntType>::probabilities Synopsis std::vector<double> probabilities() const; (since C++11) Obtains a std::vector<double> containing the individual probabilities of each integer that is generated by this distribution. Parameters (none) Return value An object of type std::vector<double> Example // Run this code #include <iostream> #include <vector> #include <random> int main() { std::discrete_distribution<> d({40, 10, 10, 40}); std::vector<double> p…
std::discrete_distribution<IntType>::param – std::discrete_distribution<IntType>::param Synopsis param_type param() const; (1) (since C++11) void param( const param_type& params ); (2) (since C++11) Manages the associated distribution parameter set. 1) Returns the associated parameter set. 2) Sets the associated parameter set to params Parameters params – new contents of the associated parameter set Return value 1) The associated parameter…
std::discrete_distribution<IntType>::operator() – std::discrete_distribution<IntType>::operator() Synopsis template <class Generator> (1)(since C++ 11) result_type operator()(Generator &g); template <class Generator> (2)(since C++ 11) result_type operator()(Generator &g, const param_type ¶ms); Generates random numbers that are distributed according to the associated probability function. The entropy is acquired by calling g.operator(). The first version uses the associated parameter set, the second version…
std::discrete_distribution<IntType>::min – std::discrete_distribution<IntType>::min Synopsis result_type min() const; (since C++11) Returns the minimum value potentially generated by the distribution. Parameters (none) Return value The minimum value potentially generated by the distribution Complexity Constant. See also returns the maximum potentially generated value max (public member function)
std::discrete_distribution<IntType>::max – std::discrete_distribution<IntType>::max Synopsis result_type max() const; (since C++11) Returns the maximum value potentially generated by the distribution. Parameters (none) Return value The maximum value potentially generated by the distribution. Complexity Constant. See also returns the minimum potentially generated value min (public member function)
std::discrete_distribution<IntType>::discrete_distribution – std::discrete_distribution<IntType>::discrete_distribution Synopsis discrete_distribution(); (1) (since C++11) template< class InputIt > (2) (since C++11) discrete_distribution( InputIt first, InputIt last ); discrete_distribution( std::initializer_list<double> weights ); (3) (since C++11) template< class UnaryOperation > discrete_distribution( std::size_t count, double xmin, double xmax, (4) (since C++11) UnaryOperation unary_op ); explicit discrete_distribution( const param_type& params ); (5) (since C++11) Constructs…
std::discrete_distribution – std::discrete_distribution Synopsis Defined in header<random> template <class IntType = int> (since C++ 11) class discrete_distribution; std::discrete_distribution produces random integers on the interval [0, n), where the probability of each individual integer i is defined as w i/S, that is the weight of the ith integer divided by the sum of all n weights….
std::discard_block_engine<Engine,P,R>::seed – std::discard_block_engine<Engine,P,R>::seed Synopsis void seed(); (1)(since C++ 11) void seed(result_type value); (2)(since C++ 11) template <class Sseq> (3)(since C++ 11) void seed(Sseq &seq); Reinitializes the internal state of the underlying engine using a new seed value. 1) Seeds the underlying engine with the default seed value. Effectively calls e.seed(), where e is the underlying…
std::difftime – std::difftime Synopsis Defined in header <ctime> double difftime( std::time_t time_end, std::time_t time_beg ); Computes difference between two calendar times as std::time_t objects (time_end – time_beg) in seconds. If time_end refers to time point before time_beg then the result is negative. Parameters time_beg, time_end – times to compare Return value Difference between two times…
std::destroying_delete_t,std::destroying_delete – std::destroying_delete_t,std::destroying_delete Synopsis Defined in header<new> struct destroying_delete_t { explicit destroying_delete_t() = default; }; (since C++ 20) inline constexpr destroying_delete_t destroying_delete{}; (since C++ 20) Tag type used to identify the destroying delete form of operator_delete. See also deallocation functions operator_delete (function) operator_delete[]
std::destroy_n – std::destroy_n Synopsis Defined in header <memory> template< class ForwardIt, class Size > (1) (since C++17) ForwardIt destroy_n( ForwardIt first, Size n ); template< class ExecutionPolicy, class ForwardIt, class Size > (2) (since C++17) ForwardIt destroy_n( ExecutionPolicy&& policy, ForwardIt first, Size n ); 1) Destroys the n objects in the range starting at first,…
std::destroy_at – std::destroy_at Synopsis Defined in header<memory> template <class T> (since C++ 17) void destroy_at(T *p); Calls the destructor of the object pointed to by p, as if by p->~T(). Parameters p – a pointer to the object to be destroyed Return value (none) Possible implementation template<class T> void destroy_at(T* p) { p->~T(); } Example…
std::destroy – std::destroy Synopsis Defined in header<memory> template <class ForwardIt> (1)(since C++ 17) void destroy(ForwardIt first, ForwardIt last); template <class ExecutionPolicy, class ForwardIt> (2)(since C++ 17) void destroy(ExecutionPolicy &&policy, ForwardIt first, ForwardIt last); 1) Destroys the objects in the range [first, last), as if by for (; first != last; ++first) std::destroy_at(std::addressof(*first)); 2) Same as…
std::deque<T,Allocator>::~deque – std::deque<T,Allocator>::~deque Synopsis ~deque(); Destructs the container. The destructors of the elements are called and the used storage is deallocated. Note, that if the elements are pointers, the pointed-to objects are not destroyed. Complexity Linear in the size of the container.
std::defer_lock_t,std::try_to_lock_t,std::adopt_lock_t – std::defer_lock_t,std::try_to_lock_t,std::adopt_lock_t Synopsis Defined in header<mutex> struct defer_lock_t { }; (since C++ 11) struct try_to_lock_t { }; (until C++ 17) struct adopt_lock_t { }; struct defer_lock_t { explicit defer_lock_t() = default; }; struct try_to_lock_t { explicit try_to_lock_t() = default; }; (since C++ 17) struct adopt_lock_t { explicit adopt_lock_t() = default; }; std::defer_lock_t, std::try_to_lock_t and…
std::defer_lock,std::try_to_lock,std::adopt_lock – std::defer_lock,std::try_to_lock,std::adopt_lock Synopsis Defined in header <mutex> constexpr std::defer_lock_t defer_lock {}; (since C++11) (until C++17) inline constexpr std::defer_lock_t defer_lock {}; (since C++17) constexpr std::try_to_lock_t try_to_lock {}; (since C++11) (until C++17) inline constexpr std::try_to_lock_t try_to_lock {}; (since C++17) constexpr std::adopt_lock_t adopt_lock {}; (since C++11) (until C++17) inline constexpr std::adopt_lock_t adopt_lock {}; (since C++17) std::defer_lock, std::try_to_lock…
std::default_searcher – std::default_searcher Synopsis Defined in header <functional> template< class ForwardIt, class BinaryPredicate = std::equal_to<> > (since C++17) class default_searcher; A class suitable for use with Searcher overload of std::search that delegates the search operation to the pre-C++17 standard library’s std::search. default_searcher is CopyConstructible and CopyAssignable. Member functions std::default_searcher::default_searcher default_searcher( ForwardIt pat_first, (since C++17) ForwardIt…
std::default_delete – std::default_delete Synopsis Defined in header <memory> template< class T > struct default_delete; (1) (since C++11) template< class T > struct default_delete<T[]>; (2) (since C++11) std::default_delete is the default destruction policy used by std::unique_ptr when no deleter is specified. 1) The non-specialized default_delete uses delete to deallocate memory for a single object. 2) A…
std::declval – std::declval Synopsis Defined in header<utility> template <class T> (since C++ 11) typename std::add_rvalue_reference<T>::type declval() noexcept; Converts any type T to a reference type, making it possible to use member functions in decltype expressions without the need to go through constructors. declval is commonly used in templates where acceptable template parameters may have no…