sparrow::empty_iterator< T > Class Template Reference

Iterator for null arrays where all elements are null. More...

#include <null_array.hpp>

Inheritance diagram for sparrow::empty_iterator< T >:

Collaboration diagram for sparrow::empty_iterator< T >:

Public Types
using	self_type = empty_iterator<T>
using	base_type = iterator_base<self_type, T, std::contiguous_iterator_tag, T>
using	reference = typename base_type::reference
using	difference_type = typename base_type::difference_type

Public Member Functions
	empty_iterator (difference_type index=difference_type()) noexcept
	Constructs an empty iterator at the specified position.

Friends
class	iterator_access

Detailed Description

template<class T>
class sparrow::empty_iterator< T >

Iterator for null arrays where all elements are null.

This iterator provides a memory-efficient way to iterate over null arrays without storing actual data. It generates null values on-demand and maintains position information to support all iterator operations.

The iterator satisfies the contiguous iterator concept despite not pointing to actual memory, as it represents a conceptually contiguous sequence of identical null values.

Template Parameters

T	The value type of the iterator (typically nullable<null_type>)

Precondition

T must be default constructible to represent null values

Postcondition

Iterator provides contiguous iterator semantics

Dereferencing always yields default-constructed T (null value)

Iterator operations have O(1) complexity

empty_iterator<nullable<null_type>> it(0);
auto null_val = *it;  // Always returns default-constructed nullable
++it;                 // Advances position counter

Definition at line 58 of file null_array.hpp.

Member Typedef Documentation

base_type

template<class T>

using sparrow::empty_iterator< T >::base_type = iterator_base<self_type, T, std::contiguous_iterator_tag, T>

Definition at line 63 of file null_array.hpp.

difference_type

template<class T>

using sparrow::empty_iterator< T >::difference_type = typename base_type::difference_type

Definition at line 65 of file null_array.hpp.

reference

template<class T>

using sparrow::empty_iterator< T >::reference = typename base_type::reference

Definition at line 64 of file null_array.hpp.

self_type

template<class T>

using sparrow::empty_iterator< T >::self_type = empty_iterator<T>

Definition at line 62 of file null_array.hpp.

Constructor & Destructor Documentation

empty_iterator()

template<class T>

sparrow::empty_iterator< T >::empty_iterator ( difference_type index = difference_type() )

explicitnoexcept

Constructs an empty iterator at the specified position.

Parameters

index

Position index for the iterator (defaults to 0)

Postcondition

Iterator is positioned at the specified index

Iterator is ready for all iterator operations

Definition at line 585 of file null_array.hpp.

Friends And Related Symbol Documentation

iterator_access

template<class T>

friend class iterator_access

friend

Definition at line 148 of file null_array.hpp.

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

• /home/runner/work/sparrow/sparrow/include/sparrow/layout/null_array.hpp