helios::utils::SkipAdapter< Iter > Class Template Reference

Iterator adapter that skips the first N elements. More...

#include <functional_adapters.hpp>

Inheritance diagram for helios::utils::SkipAdapter< Iter >:

Public Types
using	iterator_concept = details::adapter_iterator_concept_t<Iter>
using	iterator_category = details::adapter_iterator_category_t<Iter>
using	value_type = std::iter_value_t<Iter>
using	reference = value_type
using	pointer = void
using	difference_type = std::iter_difference_t<Iter>

Public Member Functions
constexpr	SkipAdapter (Iter begin, Iter end, size_t count) noexcept(std::is_nothrow_move_constructible_v< Iter > &&noexcept(++std::declval< Iter & >()))
	Constructs a skip adapter with the given iterator range and count.
template<ExternalRange R> requires SkipAdapterRequirements<std::ranges::iterator_t<R>>
constexpr	SkipAdapter (R &range, size_t count) noexcept(noexcept(SkipAdapter(std::ranges::begin(range), std::ranges::end(range), count)))
	Constructs a skip adapter from a range and count.
template<ExternalRange R> requires SkipAdapterRequirements<std::ranges::iterator_t<const R>>
constexpr	SkipAdapter (const R &range, size_t count) noexcept(noexcept(SkipAdapter(std::ranges::cbegin(range), std::ranges::cend(range), count)))
	Constructs a skip adapter from a const range and count.
constexpr	SkipAdapter (const SkipAdapter &) noexcept(std::is_nothrow_copy_constructible_v< Iter >)=default
constexpr	SkipAdapter (SkipAdapter &&) noexcept(std::is_nothrow_move_constructible_v< Iter >)=default
constexpr	~SkipAdapter () noexcept(std::is_nothrow_destructible_v< Iter >)=default
constexpr SkipAdapter &	operator= (const SkipAdapter &) noexcept(std::is_nothrow_copy_assignable_v< Iter >)=default
constexpr SkipAdapter &	operator= (SkipAdapter &&) noexcept(std::is_nothrow_move_assignable_v< Iter >)=default
constexpr SkipAdapter &	operator++ () noexcept(noexcept(++std::declval< Iter & >()))
constexpr SkipAdapter	operator++ (int) noexcept(std::is_nothrow_copy_constructible_v< SkipAdapter > &&noexcept(++std::declval< SkipAdapter & >()))
constexpr reference	operator* () const noexcept(noexcept(*std::declval< const Iter & >()))
pointer	operator-> () const =delete
constexpr bool	operator== (const SkipAdapter &other) const noexcept(noexcept(std::declval< const Iter & >()==std::declval< const Iter & >()))
constexpr bool	operator!= (const SkipAdapter &other) const noexcept(noexcept(std::declval< const SkipAdapter & >()==std::declval< const SkipAdapter & >()))
constexpr SkipAdapter	begin () const noexcept(std::is_nothrow_copy_constructible_v< SkipAdapter >)
constexpr SkipAdapter	end () const noexcept(std::is_nothrow_constructible_v< SkipAdapter, const Iter &, const Iter &, size_t >)
Public Member Functions inherited from helios::utils::FunctionalAdapterBase< SkipAdapter< Iter > >
constexpr auto	Filter (Pred predicate) const noexcept(noexcept(FilterAdapter< SkipAdapter< Iter >, Pred >(GetDerived().begin(), GetDerived().end(), std::move(predicate))))
	Chains another filter operation on top of this iterator.
constexpr auto	Map (Func transform) const noexcept(noexcept(MapAdapter< SkipAdapter< Iter >, Func >(GetDerived().begin(), GetDerived().end(), std::move(transform))))
	Transforms each element using the given function.
constexpr auto	Take (size_t count) const noexcept(noexcept(TakeAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end(), count)))
	Limits the number of elements to at most count.
constexpr auto	Skip (size_t count) const noexcept(noexcept(SkipAdapter< Derived >(GetDerived().begin(), GetDerived().end(), count)))
	Skips the first count elements.
constexpr auto	TakeWhile (Pred predicate) const noexcept(noexcept(TakeWhileAdapter< SkipAdapter< Iter >, Pred >(GetDerived().begin(), GetDerived().end(), std::move(predicate))))
	Takes elements while a predicate is true.
constexpr auto	SkipWhile (Pred predicate) const noexcept(noexcept(SkipWhileAdapter< SkipAdapter< Iter >, Pred >(GetDerived().begin(), GetDerived().end(), std::move(predicate))))
	Skips elements while a predicate is true.
constexpr auto	Enumerate () const noexcept(noexcept(EnumerateAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end())))
	Adds an index to each element.
constexpr auto	Inspect (Func inspector) const noexcept(noexcept(InspectAdapter< SkipAdapter< Iter >, Func >(GetDerived().begin(), GetDerived().end(), std::move(inspector))))
	Observes each element without modifying it.
constexpr auto	StepBy (size_t step) const noexcept(noexcept(StepByAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end(), step)))
	Takes every Nth element.
constexpr auto	Chain (OtherIter begin, OtherIter end) const noexcept(noexcept(ChainAdapter< SkipAdapter< Iter >, OtherIter >(GetDerived().begin(), GetDerived().end(), std::move(begin), std::move(end))))
	Chains another range after this one.
constexpr auto	Reverse () const noexcept(noexcept(ReverseAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end())))
	Reverses the order of elements.
constexpr auto	Slide (size_t window_size) const noexcept(noexcept(SlideAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end(), window_size)))
	Creates sliding windows over elements.
constexpr auto	Stride (size_t stride) const noexcept(noexcept(StrideAdapter< SkipAdapter< Iter > >(GetDerived().begin(), GetDerived().end(), stride)))
	Takes every Nth element with stride.
constexpr auto	Zip (OtherIter begin, OtherIter end) const noexcept(noexcept(ZipAdapter< SkipAdapter< Iter >, OtherIter >(GetDerived().begin(), GetDerived().end(), std::move(begin), std::move(end))))
	Zips another range with this one.
constexpr void	ForEach (const Action &action) const
	Terminal operation: applies an action to each element.
constexpr T	Fold (T init, const Folder &folder) const
	Terminal operation: reduces elements to a single value using a folder function.
constexpr auto	Find (const Pred &predicate) const
	Terminal operation: finds the first element satisfying a predicate.
constexpr size_t	CountIf (const Pred &predicate) const
	Terminal operation: counts elements satisfying a predicate.
constexpr auto	Partition (const Pred &predicate) const
	Terminal operation: partitions elements into two groups based on a predicate.
constexpr auto	PartitionWith (const Pred &predicate, Allocator allocator) const
	Terminal operation: partitions elements with a custom allocator.
constexpr auto	MaxBy (const KeyFunc &key_func) const
	Terminal operation: finds the element with the maximum value according to a key function.
constexpr auto	MinBy (const KeyFunc &key_func) const
	Terminal operation: finds the element with the minimum value according to a key function.
constexpr auto	GroupBy (const KeyFunc &key_func) const
	Terminal operation: groups elements by a key function.
constexpr auto	GroupByWith (const KeyFunc &key_func, MapAllocator map_allocator, ValueAllocator value_allocator) const
	Terminal operation: groups elements by key with custom allocators.
constexpr auto	Collect () const
	Terminal operation: collects all elements into a vector.
constexpr auto	CollectWith (Allocator allocator={}) const
	Terminal operation: collects all elements into a vector with a custom allocator.
constexpr void	Into (OutIt out) const
	Terminal operation: writes all elements into an output iterator.
constexpr bool	Any (const Pred &predicate) const
	Terminal operation: checks if any element satisfies a predicate.
constexpr bool	All (const Pred &predicate) const
	Terminal operation: checks if all elements satisfy a predicate.
constexpr bool	None (const Pred &predicate) const
	Terminal operation: checks if no elements satisfy a predicate.

Additional Inherited Members
Protected Member Functions inherited from helios::utils::FunctionalAdapterBase< SkipAdapter< Iter > >
constexpr SkipAdapter< Iter > &	GetDerived () noexcept
	Gets reference to derived class instance.

Detailed Description

template<typename Iter>
requires SkipAdapterRequirements<Iter>
class helios::utils::SkipAdapter< Iter >

Iterator adapter that skips the first N elements.

This adapter skips over the first N elements of the underlying iterator and yields all remaining elements. If the iterator has fewer than N elements, the result will be empty.

Note

This adapter maintains forward iterator semantics.

The adapter is constexpr-compatible for compile-time evaluation.

Template Parameters

Iter	Underlying iterator type that satisfies IteratorLike concept

// Skip the first 10 entities
auto remaining = query.Skip(10);

Definition at line 1037 of file functional_adapters.hpp.

Member Typedef Documentation

difference_type

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::difference_type = std::iter_difference_t<Iter>

Definition at line 1044 of file functional_adapters.hpp.

iterator_category

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::iterator_category = details::adapter_iterator_category_t<Iter>

Definition at line 1040 of file functional_adapters.hpp.

iterator_concept

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::iterator_concept = details::adapter_iterator_concept_t<Iter>

Definition at line 1039 of file functional_adapters.hpp.

pointer

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::pointer = void

Definition at line 1043 of file functional_adapters.hpp.

reference

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::reference = value_type

Definition at line 1042 of file functional_adapters.hpp.

value_type

template<typename Iter>

using helios::utils::SkipAdapter< Iter >::value_type = std::iter_value_t<Iter>

Definition at line 1041 of file functional_adapters.hpp.

Constructor & Destructor Documentation

SkipAdapter() [1/5]

template<typename Iter>
requires SkipAdapterRequirements<Iter>

helios::utils::SkipAdapter< Iter >::SkipAdapter ( Iter begin, Iter end, size_t count )

constexprnoexcept

Constructs a skip adapter with the given iterator range and count.

Parameters

begin	Start of the iterator range
end	End of the iterator range
count	Number of elements to skip

Definition at line 1143 of file functional_adapters.hpp.

SkipAdapter() [2/5]

template<typename Iter>

template<ExternalRange R>
requires SkipAdapterRequirements<std::ranges::iterator_t<R>>

helios::utils::SkipAdapter< Iter >::SkipAdapter ( R & range, size_t count )

inlineconstexprnoexcept

Constructs a skip adapter from a range and count.

Template Parameters

R	The type of the input range

Parameters

range	The input range to adapt
count	Number of elements to skip

Definition at line 1064 of file functional_adapters.hpp.

SkipAdapter() [3/5]

template<typename Iter>

template<ExternalRange R>
requires SkipAdapterRequirements<std::ranges::iterator_t<const R>>

helios::utils::SkipAdapter< Iter >::SkipAdapter ( const R & range, size_t count )

inlineconstexprnoexcept

Constructs a skip adapter from a const range and count.

Template Parameters

R	The type of the input range

Parameters

range	The input range to adapt
count	Number of elements to skip

Definition at line 1077 of file functional_adapters.hpp.

SkipAdapter() [4/5]

template<typename Iter>

helios::utils::SkipAdapter< Iter >::SkipAdapter ( const SkipAdapter< Iter > & ) const

constexprdefaultnoexcept

SkipAdapter() [5/5]

template<typename Iter>

helios::utils::SkipAdapter< Iter >::SkipAdapter ( SkipAdapter< Iter > && ) const

constexprdefaultnoexcept

~SkipAdapter()

template<typename Iter>

helios::utils::SkipAdapter< Iter >::~SkipAdapter ( )

constexprdefaultnoexcept

Member Function Documentation

begin()

template<typename Iter>

SkipAdapter helios::utils::SkipAdapter< Iter >::begin ( ) const

inlinenodiscardconstexprnoexcept

Definition at line 1119 of file functional_adapters.hpp.

end()

template<typename Iter>

SkipAdapter helios::utils::SkipAdapter< Iter >::end ( ) const

inlinenodiscardconstexprnoexcept

Definition at line 1124 of file functional_adapters.hpp.

operator!=()

template<typename Iter>

bool helios::utils::SkipAdapter< Iter >::operator!= ( const SkipAdapter< Iter > & other ) const

inlinenodiscardconstexprnoexcept

Definition at line 1113 of file functional_adapters.hpp.

operator*()

template<typename Iter>

reference helios::utils::SkipAdapter< Iter >::operator* ( ) const

inlinenodiscardconstexprnoexcept

Definition at line 1100 of file functional_adapters.hpp.

operator++() [1/2]

template<typename Iter>
requires SkipAdapterRequirements<Iter>

auto helios::utils::SkipAdapter< Iter >::operator++ ( )

constexprnoexcept

Definition at line 1155 of file functional_adapters.hpp.

operator++() [2/2]

template<typename Iter>
requires SkipAdapterRequirements<Iter>

auto helios::utils::SkipAdapter< Iter >::operator++ ( int )

nodiscardconstexprnoexcept

Definition at line 1163 of file functional_adapters.hpp.

operator->()

template<typename Iter>

pointer helios::utils::SkipAdapter< Iter >::operator-> ( ) const

delete

operator=() [1/2]

template<typename Iter>

SkipAdapter & helios::utils::SkipAdapter< Iter >::operator= ( const SkipAdapter< Iter > & )

constexprdefaultnoexcept

operator=() [2/2]

template<typename Iter>

SkipAdapter & helios::utils::SkipAdapter< Iter >::operator= ( SkipAdapter< Iter > && )

constexprdefaultnoexcept

operator==()

template<typename Iter>

bool helios::utils::SkipAdapter< Iter >::operator== ( const SkipAdapter< Iter > & other ) const

inlinenodiscardconstexprnoexcept

Definition at line 1107 of file functional_adapters.hpp.