xgboost::common::detail Namespace Reference

Classes
class	SpanIterator
struct	ExtentValue
struct	ExtentAsBytesValue
struct	IsAllowedExtentConversion
struct	IsAllowedElementTypeConversion
struct	IsSpanOracle
struct	IsSpanOracle< Span< T, Extent > >
struct	IsSpan
struct	Less
struct	Greater

Typedefs
using	ptrdiff_t = typename std::conditional< std::is_same< std::ptrdiff_t, std::int64_t >::value, std::ptrdiff_t, std::int64_t >::type

Functions
template<class InputIt1 , class InputIt2 , class Compare = detail::Less<decltype(std::declval<InputIt1>().operator*())>>
XGBOOST_DEVICE bool	LexicographicalCompare (InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2)

Typedef Documentation

ptrdiff_t

using xgboost::common::detail::ptrdiff_t = typedef typename std::conditional< std::is_same<std::ptrdiff_t, std::int64_t>::value, std::ptrdiff_t, std::int64_t>::type

By default, XGBoost uses uint32_t for indexing data. int64_t covers all values uint32_t can represent. Also, On x86-64 Linux, GCC uses long int to represent ptrdiff_t, which is just int64_t. So we make it deterministic here.

Function Documentation

LexicographicalCompare()

template<class InputIt1 , class InputIt2 , class Compare = detail::Less<decltype(std::declval<InputIt1>().operator*())>>

XGBOOST_DEVICE bool xgboost::common::detail::LexicographicalCompare	(	InputIt1	first1,
		InputIt1	last1,
		InputIt2	first2,
		InputIt2	last2
	)