System::Collections::Generic::IEqualityComparer< T > Class Template Referenceabstract

Inherits System::Object.

Public Member Functions

 RTTI_INFO_TEMPLATE_CLASS (System::Collections::Generic::IEqualityComparer< T >, System::BaseTypesInfo< System::Object >)
 RTTI information. More...
 
virtual bool Equals (T x, T y) ASPOSE_CONST=0
 
virtual int GetHashCode (T obj) const =0
 
- 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...
 
void SharedRefRemoved ()
 Decrements shared reference count and deletes object if it hits zero. Shouldn't be called directly; instead, use smart pointers or ThisProtector. 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 refernce counter. More...
 
void FreeOrDetectCycles (int count)
 Reacts on shared reference counter decrement. Shouldn't be called directly, use smart pointers instead. If neccessary, deletes the object. If allowed, initiates loop references lookup. 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 int GetHashCode () const
 Analog of C# Object.GetHashCode() method. Enables hashing of custom objects. More...
 
virtual String ToString () ASPOSE_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 (unsigned int argument)
 Set n'th template argument a weak pointer (rather than shared). Allows switching pointers in containers to weak mode. More...
 
template<>
bool Equals (float const &objA, float const &objB)
 
template<>
bool Equals (double const &objA, double const &objB)
 
template<>
bool ReferenceEquals (String const &str, std::nullptr_t)
 
template<>
bool ReferenceEquals (String const &str1, String const &str2)
 

Additional Inherited Members

- Public Types inherited from System::Object
typedef SmartPtr< Objectptr
 Alias for smart pointer type. More...
 
typedef System::Details::SharedMembersType shared_members_type
 structure to keep list of shared pointers contained in object. 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 ()
 Impleemnts C# typeof(System.Object) construct. More...
 

Detailed Description

template<typename T>
class System::Collections::Generic::IEqualityComparer< T >

Interface providing means to compare two objects for equality. Objects of this class should only be allocated using System::MakeObject() function. Never create instance of this type on stack or using operator new, as it will result in runtime errors and/or assertion faults. Always wrap this class into System::SmartPtr pointer and use this pointer to pass it to functions as argument.

Template Parameters
TType being compared.

Member Function Documentation

◆ Equals()

template<typename T>
virtual bool System::Collections::Generic::IEqualityComparer< T >::Equals ( x,
y 
)
pure virtual

Checks if two objects are equal.

Parameters
xLHS object.
yRHS object.
Returns
True if objects are considered equal, false otherwise.

Implemented in System::StringComparer.

◆ GetHashCode()

template<typename T>
virtual int System::Collections::Generic::IEqualityComparer< T >::GetHashCode ( obj) const
pure virtual

Gets hash code for some object.

Parameters
objObject to calculate hash code for.
Returns
Hash code calculated for obj.

Implemented in System::StringComparer.

◆ RTTI_INFO_TEMPLATE_CLASS()

RTTI information.