xgboost::SimpleLCG Class Reference

Linear congruential generator. More...

#include <helpers.h>

Public Types
using	result_type = StateType

Public Member Functions
	SimpleLCG (SimpleLCG const &that)=default
	SimpleLCG (SimpleLCG &&that)=default
void	Seed (StateType seed)
	SimpleLCG (StateType state)
	Initialize SimpleLCG.
StateType	operator() ()
StateType	Min () const
StateType	Max () const

Static Public Member Functions
constexpr static result_type	min ()
constexpr static result_type	max ()

Detailed Description

Linear congruential generator.

The distribution defined in std is not portable. Given the same seed, it migth produce different outputs on different platforms or with different compilers. The SimpleLCG implemented here is to make sure all tests are reproducible.

Constructor & Destructor Documentation

SimpleLCG()

xgboost::SimpleLCG::SimpleLCG ( StateType  state )

inlineexplicit

Initialize SimpleLCG.

Parameters

state

Initial state, can also be considered as seed. If set to zero, SimpleLCG will use internal default value.

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

• External/xgboost/tests/cpp/helpers.h
• External/xgboost/tests/cpp/helpers.cc