RooSpan< T > Class Template Reference

template<class T>
class RooSpan< T >

A simple container to hold a batch of data values.

It can operate in two modes:

• Span: It holds only a pointer to the storage held by another object like a std::span does.
• Temp data: It holds its own data, and exposes the span. This mode is necessary to ship data that are not available in a contiguous storage like e.g. data from a TTree. This means, however, that data have to be copied, and only live as long as the span.

Definition at line 34 of file RooSpan.h.

Public Types
using	iterator = typename std::span< T >::iterator
using	value_type = typename std::remove_cv< T >::type

Public Member Functions
constexpr	RooSpan ()
constexpr	RooSpan (const RooSpan &other)
template<typename NON_CONST_T , typename = typename std::enable_if<std::is_same<const NON_CONST_T, T>::value>::type>
constexpr	RooSpan (const RooSpan< NON_CONST_T > &other)
	Conversion constructor from <T> to <const T> If the input span owns some memory, the const-version of the span will copy the shared_ptr.
constexpr	RooSpan (const std::vector< typename std::remove_cv< T >::type > &vec) noexcept
template<class InputIterator >
constexpr	RooSpan (InputIterator beginIn, InputIterator endIn)
	Construct from a range. Data held by foreign object.
constexpr	RooSpan (RooSpan &&other)
constexpr	RooSpan (std::vector< typename std::remove_cv< T >::type > &vec) noexcept
constexpr	RooSpan (std::vector< value_type > &&payload)=delete
	We cannot point to temporary data.
constexpr	RooSpan (typename std::span< T >::pointer beginIn, typename std::span< T >::index_type sizeIn)
	Construct from start pointer and size.
constexpr	RooSpan (typename std::span< T >::pointer beginIn, typename std::span< T >::pointer endIn)
	Construct from start and end pointers.
constexpr std::span< T >::iterator	begin () const
constexpr std::span< T >::pointer	data () const
constexpr bool	empty () const noexcept
constexpr std::span< T >::iterator	end () const
template<typename ptr_t >
constexpr bool	insideSpan (ptr_t ptr) const
	Test if the given pointer/iterator is inside the span.
constexpr bool	isBatch () const noexcept
RooSpan &	operator= (const RooSpan &other)=default
std::span< T >::reference	operator[] (typename std::span< T >::index_type i) const noexcept
template<class Span_t >
constexpr bool	overlaps (const Span_t &other) const
	Test if the span overlaps with other.
constexpr std::span< T >::index_type	size () const noexcept

Private Attributes
std::span< T >	_span

#include <RooSpan.h>

Member Typedef Documentation

iterator

template<class T >

using RooSpan< T >::iterator = typename std::span<T>::iterator

Definition at line 36 of file RooSpan.h.

value_type

template<class T >

using RooSpan< T >::value_type = typename std::remove_cv<T>::type

Definition at line 37 of file RooSpan.h.

Constructor & Destructor Documentation

RooSpan() [1/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( )

inlineconstexpr

Definition at line 39 of file RooSpan.h.

RooSpan() [2/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( RooSpan< T > &&  other )

inlineconstexpr

Definition at line 42 of file RooSpan.h.

RooSpan() [3/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( const RooSpan< T > &  other )

inlineconstexpr

Definition at line 46 of file RooSpan.h.

RooSpan() [4/10]

template<class T >

template<typename NON_CONST_T , typename = typename std::enable_if<std::is_same<const NON_CONST_T, T>::value>::type>

constexpr RooSpan< T >::RooSpan ( const RooSpan< NON_CONST_T > &  other )

inlineconstexpr

Conversion constructor from <T> to <const T> If the input span owns some memory, the const-version of the span will copy the shared_ptr.

Definition at line 56 of file RooSpan.h.

RooSpan() [5/10]

template<class T >

template<class InputIterator >

constexpr RooSpan< T >::RooSpan ( InputIterator  beginIn, InputIterator  endIn  )

inlineconstexpr

Construct from a range. Data held by foreign object.

Definition at line 63 of file RooSpan.h.

RooSpan() [6/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( typename std::span< T >::pointer  beginIn, typename std::span< T >::pointer  endIn  )

inlineconstexpr

Construct from start and end pointers.

Definition at line 69 of file RooSpan.h.

RooSpan() [7/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( typename std::span< T >::pointer  beginIn, typename std::span< T >::index_type  sizeIn  )

inlineconstexpr

Construct from start pointer and size.

Definition at line 76 of file RooSpan.h.

RooSpan() [8/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( const std::vector< typename std::remove_cv< T >::type > &  vec )

inlineconstexprnoexcept

Definition at line 82 of file RooSpan.h.

RooSpan() [9/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( std::vector< typename std::remove_cv< T >::type > &  vec )

inlineconstexprnoexcept

Definition at line 86 of file RooSpan.h.

RooSpan() [10/10]

template<class T >

constexpr RooSpan< T >::RooSpan ( std::vector< value_type > &&  payload )

constexprdelete

We cannot point to temporary data.

Member Function Documentation

begin()

template<class T >

constexpr std::span< T >::iterator RooSpan< T >::begin ( ) const

inlineconstexpr

Definition at line 98 of file RooSpan.h.

data()

template<class T >

constexpr std::span< T >::pointer RooSpan< T >::data ( ) const

inlineconstexpr

Definition at line 106 of file RooSpan.h.

empty()

template<class T >

constexpr bool RooSpan< T >::empty ( ) const

inlineconstexprnoexcept

Definition at line 125 of file RooSpan.h.

end()

template<class T >

constexpr std::span< T >::iterator RooSpan< T >::end ( ) const

inlineconstexpr

Definition at line 102 of file RooSpan.h.

insideSpan()

template<class T >

template<typename ptr_t >

constexpr bool RooSpan< T >::insideSpan ( ptr_t  ptr ) const

inlineconstexpr

Test if the given pointer/iterator is inside the span.

Definition at line 143 of file RooSpan.h.

isBatch()

template<class T >

constexpr bool RooSpan< T >::isBatch ( ) const

inlineconstexprnoexcept

Definition at line 129 of file RooSpan.h.

operator=()

template<class T >

RooSpan & RooSpan< T >::operator= ( const RooSpan< T > &  other )

default

operator[]()

template<class T >

std::span< T >::reference RooSpan< T >::operator[] ( typename std::span< T >::index_type  i ) const

inlinenoexcept

Definition at line 115 of file RooSpan.h.

overlaps()

template<class T >

template<class Span_t >

constexpr bool RooSpan< T >::overlaps ( const Span_t &  other ) const

inlineconstexpr

Test if the span overlaps with other.

Definition at line 136 of file RooSpan.h.

size()

template<class T >

constexpr std::span< T >::index_type RooSpan< T >::size ( ) const

inlineconstexprnoexcept

Definition at line 121 of file RooSpan.h.

Member Data Documentation

_span

template<class T >

std::span<T> RooSpan< T >::_span

private

Definition at line 149 of file RooSpan.h.