Public Types
typedef _UIntType	result_type

Public Member Functions
	linear_congruential_engine (result_type __s=default_seed)

template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, linear_congruential_engine>::value> ::type>
	linear_congruential_engine (_Sseq &__q)

void	discard (unsigned long long __z)

result_type	operator() ()

void	seed (result_type __s=default_seed)

template<typename _Sseq >
std::enable_if< std::is_class< _Sseq >::value >::type	seed (_Sseq &__q)

Static Public Member Functions
static constexpr result_type	max ()

static constexpr result_type	min ()

Static Public Attributes
static constexpr result_type	default_seed

static constexpr result_type	increment

static constexpr result_type	modulus

static constexpr result_type	multiplier

Friends
template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits >
std::basic_ostream< _CharT, _Traits > &	operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &__lcr)

bool	operator== (const linear_congruential_engine &__lhs, const linear_congruential_engine &__rhs)

template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits >
std::basic_istream< _CharT, _Traits > &	operator>> (std::basic_istream< _CharT, _Traits > &__is, std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &__lcr)

Detailed Description

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
class std::linear_congruential_engine< _UIntType, a, c, __m >

A model of a linear congruential random number generator.

A random number generator that produces pseudorandom numbers via linear function:

$x_{i+1}\leftarrow(ax_{i} + c) \bmod m$

The template parameter _UIntType must be an unsigned integral type large enough to store values up to (__m-1). If the template parameter __m is 0, the modulus __m used is std::numeric_limits<_UIntType>::max() plus 1. Otherwise, the template parameters __a and __c must be less than __m.

The size of the state is $1$ .

Definition at line 236 of file random.h.

Member Typedef Documentation

◆ result_type

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

typedef _UIntType std::linear_congruential_engine< _UIntType, __a, __c, __m >::result_type

The type of the generated random value.

Definition at line 239 of file random.h.

Constructor & Destructor Documentation

◆ linear_congruential_engine() [1/2]

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

std::linear_congruential_engine< _UIntType, __a, __c, __m >::linear_congruential_engine ( result_type __s = default_seed )

inlineexplicit

Constructs a linear_congruential_engine random number generator engine with seed __s. The default seed value is 1.

Parameters

__s	The initial seed value.

Definition at line 263 of file random.h.

◆ linear_congruential_engine() [2/2]

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

template<typename _Sseq , typename = typename std::enable_if<!std::is_same<_Sseq, linear_congruential_engine>::value> ::type>

std::linear_congruential_engine< _UIntType, __a, __c, __m >::linear_congruential_engine ( _Sseq & __q )

inlineexplicit

Constructs a linear_congruential_engine random number generator engine seeded from the seed sequence __q.

Parameters

__q	the seed sequence.

Definition at line 276 of file random.h.

Member Function Documentation

◆ discard()

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

void std::linear_congruential_engine< _UIntType, __a, __c, __m >::discard ( unsigned long long __z )

inline

Discard a sequence of random numbers.

Definition at line 320 of file random.h.

◆ max()

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

static constexpr result_type std::linear_congruential_engine< _UIntType, __a, __c, __m >::max ( )

inlinestatic

Gets the largest possible value in the output range.

Definition at line 313 of file random.h.

◆ min()

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

static constexpr result_type std::linear_congruential_engine< _UIntType, __a, __c, __m >::min ( )

inlinestatic

Gets the smallest possible value in the output range.

The minimum depends on the __c parameter: if it is zero, the minimum generated must be > 0, otherwise 0 is allowed.

Definition at line 306 of file random.h.

◆ operator()()

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

result_type std::linear_congruential_engine< _UIntType, __a, __c, __m >::operator() ( )

inline

Gets the next random number in the sequence.

Definition at line 330 of file random.h.

◆ seed() [1/2]

template<typename _UIntType , _UIntType __a, _UIntType __c, _UIntType __m>

void std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed ( result_type __s = default_seed )

Reseeds the linear_congruential_engine random number generator engine sequence to the seed __s.

Parameters

__s	The new seed.

Seeds the LCR with integral value __s, adjusted so that the ring identity is never a member of the convergence set.

Definition at line 120 of file bits/random.tcc.

◆ seed() [2/2]

template<typename _UIntType , _UIntType __a, _UIntType __c, _UIntType __m>

template<typename _Sseq >

std::enable_if< std::is_class< _Sseq >::value >::type std::linear_congruential_engine< _UIntType, __a, __c, __m >::seed ( _Sseq & __q )

Reseeds the linear_congruential_engine random number generator engine sequence using values from the seed sequence __q.

Parameters

__q	the seed sequence.

Seeds the LCR engine with a value generated by __q.

Definition at line 136 of file bits/random.tcc.

References std::__lg(), std::dec(), std::fixed(), std::ios_base::flags(), std::left(), and std::__detail::operator>>().

Friends And Related Function Documentation

◆ operator<<

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits >

std::basic_ostream<_CharT, _Traits>& operator<<	(	std::basic_ostream< _CharT, _Traits > &	__os,
		const std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &	__lcr
	)

friend

Writes the textual representation of the state x(i) of x to __os.

Parameters

__os	The output stream.
__lcr	A % linear_congruential_engine random number generator.

Returns: __os.

◆ operator==

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

bool operator==	(	const linear_congruential_engine< _UIntType, __a, __c, __m > &	__lhs,
		const linear_congruential_engine< _UIntType, __a, __c, __m > &	__rhs
	)

friend

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

Parameters

__lhs	A linear congruential random number generator object.
__rhs	Another linear congruential random number generator object.

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

Definition at line 348 of file random.h.

◆ operator>>

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

template<typename _UIntType1 , _UIntType1 __a1, _UIntType1 __c1, _UIntType1 __m1, typename _CharT , typename _Traits >

std::basic_istream<_CharT, _Traits>& operator>>	(	std::basic_istream< _CharT, _Traits > &	__is,
		std::linear_congruential_engine< _UIntType1, __a1, __c1, __m1 > &	__lcr
	)

friend

Sets the state of the engine by reading its textual representation from __is.

The textual representation must have been previously written using an output stream whose imbued locale and whose type's template specialization arguments _CharT and _Traits were the same as those of __is.

Parameters

__is	The input stream.
__lcr	A % linear_congruential_engine random number generator.

Returns: __is.

Member Data Documentation

◆ increment

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

constexpr _UIntType std::linear_congruential_engine< _UIntType, __a, __c, __m >::increment

static

An increment.

Definition at line 250 of file random.h.

◆ modulus

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

constexpr _UIntType std::linear_congruential_engine< _UIntType, __a, __c, __m >::modulus

static

The modulus.

Definition at line 252 of file random.h.

◆ multiplier

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>

constexpr _UIntType std::linear_congruential_engine< _UIntType, __a, __c, __m >::multiplier

static

The multiplier.

Definition at line 248 of file random.h.

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Friends

Detailed Description

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> class std::linear_congruential_engine< _UIntType, __a, __c, __m >

Member Typedef Documentation

◆ result_type

Constructor & Destructor Documentation

◆ linear_congruential_engine() [1/2]

◆ linear_congruential_engine() [2/2]

Member Function Documentation

◆ discard()

◆ max()

◆ min()

◆ operator()()

◆ seed() [1/2]

◆ seed() [2/2]

Friends And Related Function Documentation

◆ operator<<

◆ operator==

◆ operator>>

Member Data Documentation

◆ increment

◆ modulus

◆ multiplier

template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
class std::linear_congruential_engine< _UIntType, a, c, __m >