ezRangeView< ValueType, IteratorType > Class Template Reference

This class uses delegates to define a range of values that can be enumerated using a forward iterator. More...

#include <RangeView.h>

Classes
struct	ConstIterator
	Const iterator, don't use directly, use ranged based for loops or call begin() end(). More...
struct	Iterator
	Iterator, don't use directly, use ranged based for loops or call begin() end(). More...

Public Types
using	BeginCallback = ezDelegate< IteratorType()>
using	EndCallback = ezDelegate< IteratorType()>
using	NextCallback = ezDelegate< void(IteratorType &)>
using	ValueCallback = ezDelegate< ValueType(const IteratorType &)>

Public Member Functions
EZ_ALWAYS_INLINE	ezRangeView (BeginCallback begin, EndCallback end, NextCallback next, ValueCallback value)
	Initializes the ezRangeView with the delegates used to enumerate the range.
Iterator	begin ()
Iterator	end ()
ConstIterator	begin () const
ConstIterator	end () const
ConstIterator	cbegin () const
ConstIterator	cend () const

Friends
struct	Iterator
struct	ConstIterator

Detailed Description

template<typename ValueType, typename IteratorType>
class ezRangeView< ValueType, IteratorType >

This class uses delegates to define a range of values that can be enumerated using a forward iterator.

Can be used to create a contiguous view to elements of a certain type without the need for them to actually exist in the same space or format. Think of IEnumerable in c# using composition via ezDelegate instead of derivation. ValueType defines the value type we are iterating over and IteratorType is the internal key to identify an element. An example that creates a RangeView of strings that are stored in a linear array of structs.

auto range = ezRangeView<const char*, ezUInt32>(
  [this]()-> ezUInt32 { return 0; },
  [this]()-> ezUInt32 { return array.GetCount(); },
  [this](ezUInt32& it) { ++it; },
  [this](const ezUInt32& it)-> const char* { return array[it].m_String; });
 
for (const char* szValue : range)
{
}

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

• /home/runner/work/ezEngine/ezEngine/Code/Engine/Foundation/Types/RangeView.h
• /home/runner/work/ezEngine/ezEngine/Code/Engine/Foundation/Types/Implementation/RangeView_inl.h