ArraySegment

ArraySegment class

Represents a segment of the one-dimensional array. 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<typename T>class ArraySegment : public System::Object

Template parameters

ParameterDescription
TThe type of the array segment elements.

Methods

MethodDescription
ArraySegment(System::ArrayPtr<T>)
ArraySegment(System::ArrayPtr<T>, int32_t, int32_t)
ArraySegment()
bool Equals(System::SharedPtr<Object>) override
bool Equals(ArraySegment<T>)
virtual bool Equals(ptr)Compares objects using C# Object.Equals semantics.
static std::enable_if<IsSmartPtr<T1>::value&&IsSmartPtr<T2>::value, bool>::type Equals(T1 const&, T2 const&)Compares reference type objects in C# style.
static bool Equals(float const&, float const&)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.
static bool Equals(double const&, double const&)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.
virtual bool FastCast(const Details::FastRttiBase&, void **) constFor internal purposes only.
System::ArrayPtr<T> get_Array()
int32_t get_Count()
int32_t get_Offset()
Detail::SmartPtrCounter * GetCounter()Gets reference counter data structure associated with the object.
int32_t GetHashCode() const overrideAnalog of C# Object.GetHashCode() method. Enables hashing of custom objects.
virtual const TypeInfo& GetType() constGets actual type of object. Analog of C# System.Object.GetType() call.
virtual bool Is(const TypeInfo&) constCheck if object represents an instance of type described by targetType. Analog of C# ‘is’ operator.
void Lock()Implements C# lock() statement locking. Call directly or use LockContext sentry object.
virtual ptr MemberwiseClone() constAnalog of C# Object.MemberwiseClone() method. Enables cloning custom types.
Object()Creates object. Initializes all internal data structures.
Object(Object const&)Copy constructor. Doesn’t copy anything, really, just initializes new object and enables copy constructing subclasses.
Object& operator=(Object const&)Assignment operator. Doesn’t copy anything, really, just initializes new object and enables copy constructing subclasses.
static bool ReferenceEquals(ptr const&, ptr const&)Compares objects by reference.
static std::enable_if<!IsSmartPtr<T>::value, bool>::type ReferenceEquals(T const&, T const&)Compares objects by reference.
static std::enable_if<!IsSmartPtr<T>::value, bool>::type ReferenceEquals(T const&, std::nullptr_t)Reference-compares value type object with nullptr.
bool ReferenceEquals(String const&, std::nullptr_t)Specialization of Object::ReferenceEquals for case of string and nullptr.
bool ReferenceEquals(String const&, String const&)Specialization of Object::ReferenceEquals for case of strings.
int RemovedSharedRefs(int)Decreases shared reference count by specified value.
virtual void SetTemplateWeakPtr(uint32_t)Set n’th template argument a weak pointer (rather than shared). Allows switching pointers in containers to weak mode.
int SharedCount() constGets current value of shared reference counter.
Object * SharedRefAdded()Increments shared reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector.
int SharedRefRemovedSafe()Decrements and returns shared reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector.
virtual String ToString() constAnalog of C# Object.ToString() method. Enables converting custom objects to string.
static const TypeInfo& Type()Implements C# typeof(System.Object) construct.
void Unlock()Implements C# lock() statement unlocking. Call directly or use LockContext sentry object.
Detail::SmartPtrCounter * WeakRefAdded()Increments weak reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector.
void WeakRefRemoved()Decrements weak reference count. Shouldn’t be called directly; instead, use smart pointers or ThisProtector.
virtual ~Object()Destroys object. Frees all internal data structures.

Remarks

#include <system/array_segment.h>
#include <system/smart_ptr.h>

using namespace System;

void Print(const SmartPtr<ArraySegment<String>> &segment)
{
  for (auto i = segment->get_Offset(); i < segment->get_Offset() + segment->get_Count(); i++)
  {
    std::cout << segment->get_Array()[i] << ' ';
  }
  std::cout << std::endl;
}

int main()
{
  // Create and fill the array.
  auto array = System::MakeObject<Array<String>>(3);
  array[0] = u"First";
  array[1] = u"Second";
  array[2] = u"Third";

  // Create the array segment that contains the entire array.
  auto fullArray = MakeObject<ArraySegment<String>>(array);

  // Print the array segment items.
  Print(fullArray);

  // Create the array segment.
  auto segment = MakeObject<ArraySegment<String>>(array, 1, 2);

  // Print the array segment items.
  Print(segment);

  return 0;
}
/*
This code example produces the following output:
First Second Third
Second Third
*/

See Also

Array Attribute