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std::discard_block_engine

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< cpp‎ | numeric‎ | random
Revision as of 07:53, 16 September 2013 by 8.35.201.117 (Talk)

 
 
 
 
 
Defined in header <random>
template<

    class Engine,
    size_t P, size_t R

> class discard_block_engine;
(since C++11)

discard_block_engine is a pseudo-random number generator adapter that discards a certain amount of data produced by the base engine. From each block of size P generated by the base engine, the adaptor keeps only R numbers, discarding the rest.

Contents

Template parameters

Engine - the type of the wrapped engine
P - the size of a block. Must be greater than 0.
R - the number of used numbers per block. Must be greater than 0 and not greater than P
Type requirements
-
Engine must meet the requirements of RandomNumberEngine.

Member types

Member type Definition
result_type typename Engine::result_type

Member functions

constructs the engine adaptor
(public member function) [edit]
sets the state of the underlying engine
(public member function) [edit]
returns the underlying engine
(public member function) [edit]
Generation
advances the state of the underlying engine and returns the generated value
(public member function) [edit]
advances the adaptor's state by a specified amount
(public member function) [edit]
Characteristics
[static]
gets the smallest possible value in the output range of the underlying engine.
(public static member function) [edit]
[static]
gets the largest possible value in the output range of the underlying engine.
(public static member function) [edit]

Non-member functions

compares the internal states of the adaptors and underlying engines
(function) [edit]
performs stream input and output on pseudo-random number engine adaptor
(function) [edit]

Member objects

constexpr size_t block_size
[static]
the size of the block, P
(public static member constant)
constexpr size_t used_size
[static]
the number of used numbers per block, R
(public static member constant)