std::discard_bstd::discard_blockoengine<EnRandomNumberEngine,xx)p, __r >(3cxx)
NAME
std::discard_block_engine< _RandomNumberEngine, __p, __r >
SYNOPSIS
Public Types
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
Public Member Functions
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 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
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.
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.
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.
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.
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.
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], [constexpr]
Gets the minimum value in the generated random number range.
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.
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.
Friends And Related Function Documentation
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.
Author
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libstdc++ std::discard_blockSengine<13RandomNumberEngine, __p, __r >(3cxx)
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