Is it possible to overload operator = in c#?
when i call =, i just want to copy properties, rather than making the left hand reference to refer another instance.
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2On a related note: freeworld.thc.org/root/phun/unmaintain.html.Nathan Taylor– Nathan Taylor2009-12-18 03:04:59 +00:00Commented Dec 18, 2009 at 3:04
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@Nathan: that's a masterpiece. Pretty good advice there.R. Martinho Fernandes– R. Martinho Fernandes2009-12-18 03:12:06 +00:00Commented Dec 18, 2009 at 3:12
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Maybe you are looking for value type semantics. Aren't structs better for you in this scenario?Marek– Marek2010-02-02 19:16:29 +00:00Commented Feb 2, 2010 at 19:16
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4 Answers
The answer is no:
Note that the assignment operator itself (=) cannot be overloaded. An assignment always performs a simple bit-wise copy of a value into a variable.
And even if it was possible, I wouldn't recommend it. Nobody who reads the code is going to think that there's ANY possibility that the assignment operator's been overloaded. A method to copy the object will be much clearer.
1 Comment
R. Martinho Fernandes
When I read the title of the question I was sincerely hoping this was the answer. Thankfully this isn't yet another way to wreak havoc in C++.
You can't overload the = operator. Furthermore, what you are trying to do would entirely change the operator's semantics, so in other words is a bad idea.
If you want to provide copy semantics, provide a Clone() method.
Comments
Why not make a .CopyProperties(ByVal yourObject As YourObject) method in the object?
Are you using a built-in object?
Comments
We can Overload = operator but not directly.
using System;
class Over
{
private int a;
public Over(int a )
{
this.a = a;
}
public int A { get => a; }
public static implicit operator int(Over obj)
{
return obj.A;
}
}
class yo
{
public static void Main()
{
Over over = new Over(10);
int a = over;
}
}
Here when you call that operator overloading method , it is calling = operator itself to convert that to int. You cannot directly overload "=" but this way of code means the same.
