auto_handle::operator=
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The latest version of this topic can be found at auto_handle::operator=.
Assignment operator.
Syntax
auto_handle<_element_type> % operator=(
auto_handle<_element_type> % _right
);
template<typename _other_type>
auto_handle<_element_type> % operator=(
auto_handle<_other_type> % _right
);
Parameters
_right
The auto_handle to be assigned to the current auto_handle.
Return Value
The current auto_handle, now owning _right.
Example
// msl_auto_handle_op_assign.cpp
// compile with: /clr
#include <msclr\auto_handle.h>
using namespace System;
using namespace msclr;
ref class ClassA {
protected:
String^ m_s;
public:
ClassA(String^ s) : m_s(s) {
Console::WriteLine( "in ClassA constructor: " + m_s );
}
~ClassA() {
Console::WriteLine( "in ClassA destructor: " + m_s );
}
virtual void PrintHello() {
Console::WriteLine( "Hello from {0} A!", m_s );
}
};
ref class ClassB : ClassA {
public:
ClassB( String^ s ) : ClassA( s ) {}
virtual void PrintHello() new {
Console::WriteLine( "Hello from {0} B!", m_s );
}
};
int main()
{
auto_handle<ClassA> a;
auto_handle<ClassA> a2(gcnew ClassA( "first" ) );
a = a2; // assign from same type
a->PrintHello();
auto_handle<ClassB> b(gcnew ClassB( "second" ) );
b->PrintHello();
a = b; // assign from derived type
a->PrintHello();
Console::WriteLine("done");
}
in ClassA constructor: first
Hello from first A!
in ClassA constructor: second
Hello from second B!
in ClassA destructor: first
Hello from second A!
done
in ClassA destructor: second
Requirements
Header file <msclr\auto_handle.h>
Namespace msclr