Linux Manuals

std::generate_canonical – std::generate_canonical Synopsis Defined in header <random> template< class RealType, size_t bits, class Generator > (since C++11) RealType generate_canonical( Generator& g ); Generates a random floating point number in range [0, 1). To generate enough entropy, generate_canonical() will call g() exactly k times, where \(k = max(1, \lceil \frac{b}{log_2 R} \rceil)\)k = max(1, ⌈…

std::generate – std::generate Synopsis Defined in header<algorithm> template <class ForwardIt, class Generator> (until C++ 20) void generate(ForwardIt first, ForwardIt last, Generator g); template <class ForwardIt, class Generator> (1)(since C++ 20) constexpr void generate(ForwardIt first, ForwardIt last, Generator g); template <class ExecutionPolicy, class ForwardIt, class Generator> (2)(since C++ 17) void generate(ExecutionPolicy &&policy, ForwardIt first, ForwardIt last,…

std::gcd – std::gcd Synopsis Defined in header <numeric> template< class M, class N> (since C++17) constexpr std::common_type_t<M, N> gcd(M m, N n); Computes the greatest common divisor of the integers m and n. Parameters m, n – integer values Return value If both m and n are zero, returns zero. Otherwise, returns the greatest common…

std::gamma_distribution< _RealType >::param_type – Synopsis Public Types typedef gamma_distribution < _RealType > distribution_type" Public Member Functions param_type (_RealType __alpha_val=_RealType(1), _RealType __beta_val=_RealType(1)) _RealType alpha () const _RealType beta () const Friends class gamma_distribution< _RealType > bool operator== (const param_type &__p1, const param_type &__p2) Detailed Description template<typename _RealType = double>struct std::gamma_distribution< _RealType >::param_type Parameter type. Definition at…

std::gamma_distribution<RealType>::reset – std::gamma_distribution<RealType>::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::gamma_distribution<RealType>::param – std::gamma_distribution<RealType>::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::gamma_distribution<RealType>::operator() – std::gamma_distribution<RealType>::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 &params); 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::gamma_distribution<RealType>::min – std::gamma_distribution<RealType>::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::gamma_distribution<RealType>::max – std::gamma_distribution<RealType>::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::gamma_distribution<RealType>::gamma_distribution – std::gamma_distribution<RealType>::gamma_distribution Synopsis gamma_distribution() : gamma_distribution(1.0){}(1)(since C++ 11) explicit gamma_distribution(RealType alpha, RealType beta = 1.0); (2)(since C++ 11) explicit gamma_distribution(const param_type &params); (3)(since C++ 11) Constructs a new distribution object. (2) uses alpha and beta as the distribution parameters. (3) uses params as the distribution parameters. Parameters alpha – the α distribution parameter (shape)…

std::gamma_distribution<RealType>::alpha,beta – std::gamma_distribution<RealType>::alpha,beta Synopsis RealType alpha() const; (1) (since C++11) RealType beta() const; (2) (since C++11) Returns the distribution parameters the distribution has been constructed with. 1) Returns the α distribution parameter. It is also known as the shape parameter. The default value is 1.0. 2) Returns the β distribution parameter. It is also known…

std::gamma_distribution – std::gamma_distribution Synopsis Defined in header <random> template< class RealType = double > (since C++11) class gamma_distribution; Produces random positive floating-point values x, distributed according to probability density function: \(\mathsf{p}(x\mid\alpha,\beta) = \frac{e^{-x/\beta} }{\beta^\alpha\cdot\Gamma(\alpha)}\cdot x^{\alpha-1} \)P(x|α,β) =       e-x/β       βα       · Γ(α)       · xα-1 where α is known as the shape parameter and β is known…

std::fwrite – std::fwrite Synopsis Defined in header<cstdio> std::size_t fwrite(const void *buffer, std::size_t size, std::size_t count, std::FILE *stream); Writes up to count binary objects from the given array buffer to the output stream stream. The objects are written as if by reinterpreting each object as an array of unsigned char and calling std::fputc size times for…

std::fwide – std::fwide Synopsis Defined in header<cwchar> int fwide(std::FILE *stream, int mode); If mode > 0, attempts to make stream wide-oriented. If mode < 0, attempts to make stream byte-oriented. If mode==0, only queries the current orientation of the stream. If the orientation of the stream has already been decided (by executing output or by…

std::future_status – std::future_status Synopsis Defined in header <future> enum class future_status { ready, timeout, (since C++11) deferred }; Specifies state of a future as returned by wait_for and wait_until functions of std::future and std::shared_future. Constant Explanation deferred the shared state contains a deferred function, so the result will be computed only when explicitly requested ready…

std::future_error::what – std::future_error::what Synopsis virtual const char* what() const noexcept; (since C++11) Returns the explanatory string. Parameters (none) Return value Pointer to a null-terminated string with explanatory information. See also      returns the error code code (public member function)

std::future_error::future_error – std::future_error::future_error Synopsis explicit future_error( std::future_errc ec ); (since C++17) Constructs a new future error object containing the error code std::make_error_code(ec). Parameters ec – error code Notes There is no standard-compliant way for the user to construct a future_error prior to C++17. C++11 and C++14 depict an exposition-only public constructor taking a std::error_code, and…

std::future_error::code – std::future_error::code Synopsis const std::error_code &code() const noexcept; (since C++ 11) Returns the stored error code. Parameters (none) Return value The stored error code. See also      returns the explanatory string specific to the error code what (public member function)

std::future_error – std::future_error Synopsis Defined in header <future> class future_error; (since C++11) The class std::future_error defines an exception object that is thrown on failure by the functions in the thread library that deal with asynchronous execution and shared states (std::future, std::promise, etc). Similar to std::system_error, this exception carries an error code compatible with std::error_code.  std-future…

std::future_errc – std::future_errc Synopsis Defined in header <future> enum class future_errc { broken_promise = /* implementation-defined */, future_already_retrieved = /* implementation-defined */, (since C++11) promise_already_satisfied = /* implementation-defined */, no_state = /* implementation-defined */ }; The scoped enumeration std::future_errc defines the error codes reported by std::future and related classes in std::future_error exception objects. Only four…