std::discard_block_engine man page

std::discard_block_engine< _RandomNumberEngine, __p, __r > —

Synopsis

Public Types

typedef _RandomNumberEngine::result_type result_type

Public Member Functions

discard_block_engine ()
Constructs a default discard_block_engine engine.
discard_block_engine (const _RandomNumberEngine &__rng)
Copy constructs a discard_block_engine engine.
discard_block_engine (_RandomNumberEngine &&__rng)
Move constructs a discard_block_engine engine.
discard_block_engine (result_type __s)
Seed constructs a discard_block_engine engine.
template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, discard_block_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> discard_block_engine (_Sseq &__q)
Generator construct 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.
void seed (result_type __s)
Reseeds the discard_block_engine object with the default seed for the underlying base class generator engine.
template<typename _Sseq > void seed (_Sseq &__q)
Reseeds the discard_block_engine object with the given seed sequence.

Static Public Member Functions

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 Public Attributes

static constexpr size_t block_size

static constexpr size_t used_block

Friends

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.

Detailed Description

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

Definition at line 846 of file random.h.

Member Typedef Documentation

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.

Definition at line 849 of file random.h.

Constructor & Destructor Documentation

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.

Definition at line 864 of file random.h.

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.

Definition at line 874 of file random.h.

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.

Definition at line 884 of file random.h.

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.

Definition at line 894 of file random.h.

template<typename _RandomNumberEngine, size_t __p, size_t __r> template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, discard_block_engine>::value && !std::is_same<_Sseq, _RandomNumberEngine>::value> ::type> 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.

Definition at line 907 of file random.h.

Member Function Documentation

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.

Definition at line 951 of file random.h.

Referenced by std::shuffle_order_engine< _RandomNumberEngine, __k >::operator()().

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.

Definition at line 972 of file random.h.

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

Gets the maximum value in the generated random number range.

Definition at line 965 of file random.h.

References std::max().

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

Gets the minimum value in the generated random number range.

Definition at line 958 of file random.h.

References std::min().

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.

Definition at line 688 of file bits/random.tcc.

References std::dec(), std::fixed(), std::ios_base::flags(), std::left(), std::independent_bits_engine< _RandomNumberEngine, __w, _UIntType >::operator()(), std::__detail::operator>>(), and std::skipws().

Referenced by std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::operator()().

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.

Definition at line 916 of file random.h.

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.

Definition at line 927 of file random.h.

template<typename _RandomNumberEngine, size_t __p, size_t __r> template<typename _Sseq > void 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.

Definition at line 940 of file random.h.

Author

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Fri Sep 16 2016 libstdc++