DOKK / manpages / debian 13 / libstdc++-12-doc / std::discard_block_engine.3cxx.en
std::discard_block_engine< _RandomNumberEngine, __p, __r >(3cxx) std::discard_block_engine< _RandomNumberEngine, __p, __r >(3cxx)

std::discard_block_engine< _RandomNumberEngine, __p, __r >

#include <random>


template<typename _Sseq > using _If_seed_seq = typename enable_if< __detail::__is_seed_seq< _Sseq, discard_block_engine, result_type >::value >::type
typedef _RandomNumberEngine::result_type result_type


discard_block_engine ()
Constructs a default discard_block_engine engine. discard_block_engine (_RandomNumberEngine &&__rng)
Move constructs a discard_block_engine engine. template<typename _Sseq , typename = _If_seed_seq<_Sseq>> discard_block_engine (_Sseq &__q)
Generator construct a discard_block_engine engine. discard_block_engine (const _RandomNumberEngine &__rng)
Copy constructs a discard_block_engine engine. discard_block_engine (result_type __s)
Seed constructs a discard_block_engine engine. const _RandomNumberEngine & base () const noexcept
Gets a const reference to the underlying generator engine object. void discard (unsigned long long __z)
Discard a sequence of random numbers. result_type operator() ()
Gets the next value in the generated random number sequence. void seed ()
Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine. template<typename _Sseq > _If_seed_seq< _Sseq > seed (_Sseq &__q)
Reseeds the discard_block_engine object with the given seed sequence. void seed (result_type __s)
Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine.


static constexpr result_type max ()
Gets the maximum value in the generated random number range. static constexpr result_type min ()
Gets the minimum value in the generated random number range.


static constexpr size_t block_size
static constexpr size_t used_block


template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::discard_block_engine< _RandomNumberEngine1, __p1, __r1 > &__x)
Inserts the current state of a discard_block_engine random number generator engine __x into the output stream __os. bool operator== (const discard_block_engine &__lhs, const discard_block_engine &__rhs)
Compares two discard_block_engine random number generator objects of the same type for equality. template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, std::discard_block_engine< _RandomNumberEngine1, __p1, __r1 > &__x)
Extracts the current state of a % subtract_with_carry_engine random number generator engine __x from the input stream __is.

template<typename _RandomNumberEngine, size_t __p, size_t __r>

class std::discard_block_engine< _RandomNumberEngine, __p, __r >"Produces random numbers from some base engine by discarding blocks of data.

0 <= __r <= __p

template<typename _RandomNumberEngine , size_t __p, size_t __r> typedef _RandomNumberEngine::result_type std::discard_block_engine< _RandomNumberEngine, __p, __r >::result_type

The type of the generated random value.

template<typename _RandomNumberEngine , size_t __p, size_t __r> std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard_block_engine () [inline]

Constructs a default discard_block_engine engine. The underlying engine is default constructed as well.

template<typename _RandomNumberEngine , size_t __p, size_t __r> std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard_block_engine (const _RandomNumberEngine & __rng) [inline], [explicit]

Copy constructs a discard_block_engine engine. Copies an existing base class random number generator.

Parameters

__rng An existing (base class) engine object.

template<typename _RandomNumberEngine , size_t __p, size_t __r> std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard_block_engine (_RandomNumberEngine && __rng) [inline], [explicit]

Move constructs a discard_block_engine engine. Copies an existing base class random number generator.

Parameters

__rng An existing (base class) engine object.

template<typename _RandomNumberEngine , size_t __p, size_t __r> std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard_block_engine (result_type __s) [inline], [explicit]

Seed constructs a discard_block_engine engine. Constructs the underlying generator engine seeded with __s.

Parameters

__s A seed value for the base class engine.

template<typename _RandomNumberEngine , size_t __p, size_t __r> template<typename _Sseq , typename = _If_seed_seq<_Sseq>> std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard_block_engine (_Sseq & __q) [inline], [explicit]

Generator construct a discard_block_engine engine.

Parameters

__q A seed sequence.

template<typename _RandomNumberEngine , size_t __p, size_t __r> const _RandomNumberEngine & std::discard_block_engine< _RandomNumberEngine, __p, __r >::base () const [inline], [noexcept]

Gets a const reference to the underlying generator engine object.

template<typename _RandomNumberEngine , size_t __p, size_t __r> void std::discard_block_engine< _RandomNumberEngine, __p, __r >::discard (unsigned long long __z) [inline]

Discard a sequence of random numbers.

template<typename _RandomNumberEngine , size_t __p, size_t __r> static constexpr result_type std::discard_block_engine< _RandomNumberEngine, __p, __r >::max () [inline], [static], [constexpr]

Gets the maximum value in the generated random number range.

template<typename _RandomNumberEngine , size_t __p, size_t __r> static constexpr result_type std::discard_block_engine< _RandomNumberEngine, __p, __r >::min () [inline], [static], [constexpr]

Gets the minimum value in the generated random number range.

template<typename _RandomNumberEngine , size_t __p, size_t __r> discard_block_engine< _RandomNumberEngine, __p, __r >::result_type std::discard_block_engine< _RandomNumberEngine, __p, __r >::operator() ()

Gets the next value in the generated random number sequence.

template<typename _RandomNumberEngine , size_t __p, size_t __r> void std::discard_block_engine< _RandomNumberEngine, __p, __r >::seed () [inline]

Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine.

template<typename _RandomNumberEngine , size_t __p, size_t __r> template<typename _Sseq > _If_seed_seq< _Sseq > std::discard_block_engine< _RandomNumberEngine, __p, __r >::seed (_Sseq & __q) [inline]

Reseeds the discard_block_engine object with the given seed sequence.

Parameters

__q A seed generator function.

template<typename _RandomNumberEngine , size_t __p, size_t __r> void std::discard_block_engine< _RandomNumberEngine, __p, __r >::seed (result_type __s) [inline]

Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine.

template<typename _RandomNumberEngine , size_t __p, size_t __r> template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > & __os, const std::discard_block_engine< _RandomNumberEngine1, __p1, __r1 > & __x) [friend]

Inserts the current state of a discard_block_engine random number generator engine __x into the output stream __os.

Parameters

__os An output stream.
__x A discard_block_engine random number generator engine.

Returns

The output stream with the state of __x inserted or in an error state.

template<typename _RandomNumberEngine , size_t __p, size_t __r> bool operator== (const discard_block_engine< _RandomNumberEngine, __p, __r > & __lhs, const discard_block_engine< _RandomNumberEngine, __p, __r > & __rhs) [friend]

Compares two discard_block_engine random number generator objects of the same type for equality.

Parameters

__lhs A discard_block_engine random number generator object.
__rhs Another discard_block_engine random number generator object.

Returns

true if the infinite sequences of generated values would be equal, false otherwise.

template<typename _RandomNumberEngine , size_t __p, size_t __r> template<typename _RandomNumberEngine1 , size_t __p1, size_t __r1, typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > & __is, std::discard_block_engine< _RandomNumberEngine1, __p1, __r1 > & __x) [friend]

Extracts the current state of a % subtract_with_carry_engine random number generator engine __x from the input stream __is.

Parameters

__is An input stream.
__x A discard_block_engine random number generator engine.

Returns

The input stream with the state of __x extracted or in an error state.

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