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System::Linq::Details::CachedEnumerable< TItem > Class Template Reference

Internal utility class Implements IEnumerable over queue of items. More...

Inherits System::Collections::Generic::IEnumerable< TItem >.

Public Member Functions

 CachedEnumerable (System::Func< bool > requestNext)
 
System::SharedPtr< System::Collections::Generic::IEnumerator< TItem > > GetEnumerator () override
 Gets enumerator. More...
 
void Add (TItem item)
 
- Public Member Functions inherited from System::Collections::Generic::IEnumerable< TItem >
TItem LINQ_ElementAt (int index)
 Returns the element at a specified index in a sequence. More...
 
TItem LINQ_First ()
 Returns the first element of a sequence. More...
 
TItem LINQ_First (const Func< TItem, bool > &predicate)
 Returns the first element of a sequence that satisfy the specified condition. More...
 
TItem LINQ_FirstOrDefault ()
 Returns the first element of a sequence, or a default value if the sequence is empty. More...
 
TItem LINQ_FirstOrDefault (std::function< bool(TItem)> predicate)
 Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. More...
 
TItem LINQ_Last ()
 Returns the last element of a sequence. More...
 
TItem LINQ_LastOrDefault ()
 Returns the last element of a sequence, or a default value if the sequence is empty. More...
 
SharedPtr< List< TItem > > LINQ_ToList ()
 Creates a List<T> from a sequence. More...
 
int LINQ_Count ()
 Returns the number of elements in the sequence (calculated via direct counting). More...
 
int LINQ_Count (const Func< TItem, bool > &predicate)
 Returns the number of elements in the sequence that satisfy the specified condition. More...
 
System::ArrayPtr< TItem > LINQ_ToArray ()
 Creates an array from a sequence. More...
 
bool LINQ_All (std::function< bool(TItem)> predicate)
 Determines whether all elements of a sequence satisfy a condition. More...
 
bool LINQ_Any ()
 Determines whether a sequence contains any elements. More...
 
bool LINQ_Any (std::function< bool(TItem)> predicate)
 Determines whether any element of a sequence exists or satisfies a condition. More...
 
SharedPtr< IEnumerable< TItem > > LINQ_Where (std::function< bool(TItem)> predicate)
 Filters a sequence based on the specified predicate. More...
 
bool LINQ_Contains (TItem value)
 Determines if a sequence contains a specified value. More...
 
SharedPtr< IEnumerable< ResultType > > LINQ_Cast ()
 Casts the elements to the specified type. More...
 
SharedPtr< IEnumerable< Result > > LINQ_Cast ()
 
SharedPtr< IEnumerable< TItem > > LINQ_OrderBy (const Func< TItem, Key > &keySelector)
 Sorts the elements of a sequence in ascending order according to the key values selected by keySelector. More...
 
SharedPtr< IEnumerable< Source > > LINQ_OrderBy (const Func< Source, Key > &keySelector)
 
SharedPtr< IEnumerable< TItem > > LINQ_OrderByDescending (const Func< TItem, Key > &keySelector)
 Sorts the elements of a sequence in descending order according to the key values selected by keySelector. More...
 
SharedPtr< IEnumerable< Source > > LINQ_OrderByDescending (const Func< Source, Key > &keySelector)
 
SharedPtr< IEnumerable< ResultType > > LINQ_OfType ()
 Filters the elements of the sequence based on the specified type. More...
 
SharedPtr< IEnumerable< Result > > LINQ_OfType ()
 
SharedPtr< IEnumerable< ResultType > > LINQ_Select (const Func< TItem, ResultType > &selector)
 Transforms elements of a sequence. More...
 
SharedPtr< IEnumerable< ResultType > > LINQ_Select (const Func< TItem, int32_t, ResultType > &selector)
 Transforms each element of a sequence into a new form by incorporating the element's index. More...
 
SharedPtr< IEnumerable< Result > > LINQ_Select (const Func< Source, Result > &selector)
 
SharedPtr< IEnumerable< Result > > LINQ_Select (const Func< Source, int32_t, Result > &selector)
 
SharedPtr< IEnumerable< TItem > > LINQ_Concat (SharedPtr< IEnumerable< TItem >> sequence)
 Concatenates two sequences. More...
 
System::SharedPtr< IEnumerable< System::SharedPtr< System::Linq::IGrouping< Key, TItem > > > > LINQ_GroupBy (System::Func< TItem, Key > keyPredicate)
 Groups the elements of a sequence. More...
 
SharedPtr< IEnumerable< SharedPtr< System::Linq::IGrouping< Key, Source > > > > LINQ_GroupBy (System::Func< Source, Key > keyPredicate)
 
SharedPtr< IEnumerable< ResultType > > LINQ_SelectMany (const Func< TItem, SharedPtr< IEnumerable< ResultType >>> &selector)
 Projects each element of a sequence and combines the resulting sequences into one sequence. More...
 
SharedPtr< IEnumerable< Result > > LINQ_SelectMany (const Func< Source, SharedPtr< IEnumerable< Result >>> &selector)
 
iterator begin () noexcept
 Gets iterator pointing to the first element (if any) of the collection. This iterator can't be used to change a referenced object because GetEnumerator() returns a copy-object of T. More...
 
const_iterator begin () const noexcept
 Gets iterator pointing to the first element (if any) of the const-qualified instance of the collection. More...
 
iterator end () noexcept
 Gets iterator pointing right after the last element (if any) of the collection. This iterator can't be used to change a referenced object because GetEnumerator() returns a copy-object of T. More...
 
const_iterator end () const noexcept
 Gets iterator pointing right after the last element (if any) of the const-qualified instance of the collection. More...
 
const_iterator cbegin () const noexcept
 Gets iterator pointing to the first const-qualified element (if any) of the collection. More...
 
const_iterator cend () const noexcept
 Gets iterator pointing right after the last const-qualified element (if any) of the collection. More...
 
- Public Member Functions inherited from System::Object
 Object ()
 Creates object. Initializes all internal data structures. More...
 
virtual ~Object ()
 Destroys object. Frees all internal data structures. More...
 
 Object (Object const &x)
 Copy constructor. Doesn't copy anything, really, just initializes new object and enables copy constructing subclasses. More...
 
Objectoperator= (Object const &x)
 Assignment operator. Doesn't copy anything, really, just initializes new object and enables copy constructing subclasses. More...
 
ObjectSharedRefAdded ()
 Increments shared reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...
 
int SharedRefRemovedSafe ()
 Decrements and returns shared reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...
 
int RemovedSharedRefs (int count)
 Decreases shared reference count by specified value. More...
 
Detail::SmartPtrCounter * WeakRefAdded ()
 Increments weak reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...
 
void WeakRefRemoved ()
 Decrements weak reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...
 
Detail::SmartPtrCounter * GetCounter ()
 Gets reference counter data structure associated with the object. More...
 
int SharedCount () const
 Gets current value of shared reference counter. More...
 
void Lock ()
 Implements C# lock() statement locking. Call directly or use LockContext sentry object. More...
 
void Unlock ()
 Implements C# lock() statement unlocking. Call directly or use LockContext sentry object. More...
 
virtual bool Equals (ptr obj)
 Compares objects using C# Object.Equals semantics. More...
 
virtual int32_t GetHashCode () const
 Analog of C# Object.GetHashCode() method. Enables hashing of custom objects. More...
 
virtual String ToString () const
 Analog of C# Object.ToString() method. Enables converting custom objects to string. More...
 
virtual ptr MemberwiseClone () const
 Analog of C# Object.MemberwiseClone() method. Enables cloning custom types. More...
 
virtual const TypeInfoGetType () const
 Gets actual type of object. Analog of C# System.Object.GetType() call. More...
 
virtual bool Is (const TypeInfo &targetType) const
 Check if object represents an instance of type described by targetType. Analog of C# 'is' operator. More...
 
virtual void SetTemplateWeakPtr (uint32_t argument)
 Set n'th template argument a weak pointer (rather than shared). Allows switching pointers in containers to weak mode. More...
 
virtual bool FastCast (const Details::FastRttiBase &helper, void **out_ptr) const
 For internal purposes only. More...
 
template<>
bool ReferenceEquals (String const &str, std::nullptr_t)
 Specialization of Object::ReferenceEquals for case of string and nullptr. More...
 
template<>
bool ReferenceEquals (String const &str1, String const &str2)
 Specialization of Object::ReferenceEquals for case of strings. More...
 

Additional Inherited Members

- Public Types inherited from System::Collections::Generic::IEnumerable< TItem >
typedef IEnumerator< TItem > IEnumeratorType
 Enumerator type. More...
 
using ValueType = TItem
 
using iterator = EnumeratorBasedIterator< TItem, IEnumerator< TItem > >
 
using const_iterator = iterator
 
- Public Types inherited from System::Object
typedef SmartPtr< Objectptr
 Alias for smart pointer type. More...
 
- Static Public Member Functions inherited from System::Object
static bool ReferenceEquals (ptr const &objA, ptr const &objB)
 Compares objects by reference. More...
 
template<typename T >
static std::enable_if<!IsSmartPtr< T >::value, bool >::type ReferenceEquals (T const &objA, T const &objB)
 Compares objects by reference. More...
 
template<typename T >
static std::enable_if<!IsSmartPtr< T >::value, bool >::type ReferenceEquals (T const &objA, std::nullptr_t)
 Reference-compares value type object with nullptr. More...
 
template<typename T1 , typename T2 >
static std::enable_if< IsSmartPtr< T1 >::value &&IsSmartPtr< T2 >::value, bool >::type Equals (T1 const &objA, T2 const &objB)
 Compares reference type objects in C# style. More...
 
template<typename T1 , typename T2 >
static std::enable_if<!IsSmartPtr< T1 >::value &&!IsSmartPtr< T2 >::value, bool >::type Equals (T1 const &objA, T2 const &objB)
 Compares value type objects in C# style. More...
 
static const TypeInfoType ()
 Implements C# typeof(System.Object) construct. More...
 
template<>
bool Equals (float const &objA, float const &objB)
 Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. More...
 
template<>
bool Equals (double const &objA, double const &objB)
 Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. More...
 
- Protected Member Functions inherited from System::Collections::Generic::IEnumerable< TItem >
 ~IEnumerable () override
 Destructor. More...
 

Detailed Description

template<typename TItem>
class System::Linq::Details::CachedEnumerable< TItem >

Internal utility class Implements IEnumerable over queue of items.

Template Parameters
TItemThe type of the element in a queue.

Constructor & Destructor Documentation

◆ CachedEnumerable()

template<typename TItem >
System::Linq::Details::CachedEnumerable< TItem >::CachedEnumerable ( System::Func< bool >  requestNext)
inline
Parameters
requestNextcallback which is called when next item is needed. callback should use Add method to insert next item of return false when no more items

Member Function Documentation

◆ Add()

template<typename TItem >
void System::Linq::Details::CachedEnumerable< TItem >::Add ( TItem  item)
inline

◆ GetEnumerator()

template<typename TItem >
System::SharedPtr<System::Collections::Generic::IEnumerator<TItem> > System::Linq::Details::CachedEnumerable< TItem >::GetEnumerator ( )
inlineoverridevirtual

Gets enumerator.

Returns
Pointer to newly created enumerator object which can be used to iterate through interfaced object.

Implements System::Collections::Generic::IEnumerable< TItem >.