NAME

       std::subtract_with_carry_engine< _UIntType, __w, __s, __r > - The Marsaglia-Zaman
       generator.

SYNOPSIS

       #include <random.h>

   Public Types
       typedef _UIntType result_type

   Public Member Functions
       template<typename _Sseq , typename  = _If_seed_seq<_Sseq>> subtract_with_carry_engine
           (_Sseq &__q)
           Constructs a subtract_with_carry_engine random number engine seeded from the seed
           sequence __q.
       subtract_with_carry_engine (result_type __sd)
           Constructs an explicitly seeded subtract_with_carry_engine random number generator.
       void discard (unsigned long long __z)
           Discard a sequence of random numbers.
       result_type operator() ()
           Gets the next random number in the sequence.
       template<typename _Sseq > _If_seed_seq< _Sseq > seed (_Sseq &__q)
           Seeds the initial state $x_0$ of the % subtract_with_carry_engine random number
           generator.
       template<typename _Sseq > auto seed (_Sseq &__q) -> _If_seed_seq< _Sseq >
       void seed (result_type __sd=default_seed)
           Seeds the initial state $x_0$ of the random number generator.

   Static Public Member Functions
       static constexpr result_type max ()
           Gets the inclusive maximum value of the range of random integers returned by this
           generator.
       static constexpr result_type min ()
           Gets the inclusive minimum value of the range of random integers returned by this
           generator.

   Static Public Attributes
       static constexpr result_type default_seed
       static constexpr size_t long_lag
       static constexpr size_t short_lag
       static constexpr size_t word_size

   Friends
       template<typename _UIntType1 , size_t __w1, size_t __s1, size_t __r1, typename _CharT ,
           typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<<
           (std::basic_ostream< _CharT, _Traits > &__os, const std::subtract_with_carry_engine<
           _UIntType1, __w1, __s1, __r1 > &__x)
           Inserts the current state of a % subtract_with_carry_engine random number generator
           engine __x into the output stream __os.
       bool operator== (const subtract_with_carry_engine &__lhs, const subtract_with_carry_engine
           &__rhs)
           Compares two % subtract_with_carry_engine random number generator objects of the same
           type for equality.
       template<typename _UIntType1 , size_t __w1, size_t __s1, size_t __r1, typename _CharT ,
           typename _Traits > std::basic_istream< _CharT, _Traits > & operator>>
           (std::basic_istream< _CharT, _Traits > &__is, std::subtract_with_carry_engine<
           _UIntType1, __w1, __s1, __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 _UIntType, size_t __w, size_t __s, size_t __r>
       class std::subtract_with_carry_engine< _UIntType, __w, __s, __r >"The Marsaglia-Zaman
       generator.

       This is a model of a Generalized Fibonacci discrete random number generator, sometimes
       referred to as the SWC generator.

       A discrete random number generator that produces pseuoorandom numbers using:
           x_{i}tarrow(x_{i - s} - x_{i - r} - carry_{i-1}) d ]

       The size of the state is $r$ and the maximum period of the generator is $(m^r - m^s - 1)$.

Member Typedef Documentation

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> typedef _UIntType
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::result_type
       The type of the generated random value.

Constructor & Destructor Documentation

   template<typename _UIntType , size_t __w, size_t __s, size_t __r>
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::subtract_with_carry_engine
       (result_type __sd) [inline],  [explicit]
       Constructs an explicitly seeded subtract_with_carry_engine random number generator.

       References std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::seed().

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> template<typename _Sseq ,
       typename  = _If_seed_seq<_Sseq>> std::subtract_with_carry_engine< _UIntType, __w, __s, __r
       >::subtract_with_carry_engine (_Sseq & __q) [inline],  [explicit]
       Constructs a subtract_with_carry_engine random number engine seeded from the seed sequence
       __q.

       Parameters
           __q the seed sequence.

       References std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::seed().

Member Function Documentation

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> void
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::discard (unsigned long long
       __z) [inline]
       Discard a sequence of random numbers.

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> static constexpr result_type
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::max () [inline],  [static],
       [constexpr]
       Gets the inclusive maximum value of the range of random integers returned by this
       generator.

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> static constexpr result_type
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::min () [inline],  [static],
       [constexpr]
       Gets the inclusive minimum value of the range of random integers returned by this
       generator.

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> subtract_with_carry_engine<
       _UIntType, __w, __s, __r >::result_type std::subtract_with_carry_engine< _UIntType, __w,
       __s, __r >::operator()
       Gets the next random number in the sequence.

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> template<typename _Sseq >
       _If_seed_seq< _Sseq > std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::seed
       (_Sseq & __q)
       Seeds the initial state $x_0$ of the % subtract_with_carry_engine random number generator.

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> void
       std::subtract_with_carry_engine< _UIntType, __w, __s, __r >::seed (result_type __sd =
       default_seed)
       Seeds the initial state $x_0$ of the random number generator. N1688[4.19] modifies this as
       follows. If __value == 0, sets value to 19780503. In any case, with a linear congruential
       generator lcg(i) having parameters $ m_{lcg} = 2147483563, a_olcg} = 40014o c_{lcg} = 0,
       and lcg(0) = value $, sets $ x_{-r} ots x_{-1} $ to $ lcg(1) d ots lcg(r) d $
       respectively. If $ x_{-1} = 0 $ set carry to 1, otherwise sets carry to 0.

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

Friends And Related Function Documentation

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> template<typename _UIntType1
       , size_t __w1, size_t __s1, size_t __r1, typename _CharT , typename _Traits >
       std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits >
       & __os, const std::subtract_with_carry_engine< _UIntType1, __w1, __s1, __r1 > & __x)
       [friend]
       Inserts the current state of a % subtract_with_carry_engine random number generator engine
       __x into the output stream __os.

       Parameters
           __os An output stream.
           __x A % subtract_with_carry_engine random number generator engine.

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

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> bool operator== (const
       subtract_with_carry_engine< _UIntType, __w, __s, __r > & __lhs, const
       subtract_with_carry_engine< _UIntType, __w, __s, __r > & __rhs) [friend]
       Compares two % subtract_with_carry_engine random number generator objects of the same type
       for equality.

       Parameters
           __lhs A % subtract_with_carry_engine random number generator object.
           __rhs Another % subtract_with_carry_engine random number generator object.

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

   template<typename _UIntType , size_t __w, size_t __s, size_t __r> template<typename _UIntType1
       , size_t __w1, size_t __s1, size_t __r1, typename _CharT , typename _Traits >
       std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits >
       & __is, std::subtract_with_carry_engine< _UIntType1, __w1, __s1, __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 % subtract_with_carry_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::subtract_with7carry_engine< _UIntType, __w, __s, __r >(3cxx)