xgboost::common::IndexTransformIter< Fn > Class Template Reference

Transform iterator that takes an index and calls transform operator. More...

#include <transform_iterator.h>

Public Types
using	iterator_category = std::random_access_iterator_tag
using	reference = std::result_of_t< Fn(std::size_t)>
using	value_type = std::remove_cv_t< std::remove_reference_t< reference > >
using	difference_type = detail::ptrdiff_t
using	pointer = std::add_pointer_t< value_type >

Public Member Functions
	IndexTransformIter (Fn &&op)
	IndexTransformIter (IndexTransformIter const &)=default
IndexTransformIter &	operator= (IndexTransformIter &&)=default
IndexTransformIter &	operator= (IndexTransformIter const &that)
reference	operator* () const
reference	operator[] (std::size_t i) const
auto	operator- (IndexTransformIter const &that) const
bool	operator== (IndexTransformIter const &that) const
bool	operator!= (IndexTransformIter const &that) const
IndexTransformIter &	operator++ ()
IndexTransformIter	operator++ (int)
IndexTransformIter &	operator+= (difference_type n)
IndexTransformIter &	operator-= (difference_type n)
IndexTransformIter	operator+ (difference_type n) const
IndexTransformIter	operator- (difference_type n) const

Detailed Description

template<typename Fn>
class xgboost::common::IndexTransformIter< Fn >

Transform iterator that takes an index and calls transform operator.

This is CPU-only right now as taking host device function as operator complicates the code. For device side one can use thrust::transform_iterator instead.

Constructor & Destructor Documentation

IndexTransformIter()

template<typename Fn >

xgboost::common::IndexTransformIter< Fn >::IndexTransformIter ( Fn &&  op )

inlineexplicit

Parameters

op	Transform operator, takes a size_t index as input.

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

• External/xgboost/src/common/transform_iterator.h