• "deed" <none none.none> Dec 04 2012
• "Dan" <dbdavidson yahoo.com> Dec 05 2012

"deed" <none none.none> writes:

interface I
{
     bool opEquals(I i);
}

class C : I
{
     bool opEquals(I i)
     {
         return true;
     }
}

void main()
{
     I i1 = new C;
     I i2 = new C;
     assert(i1 == i2);  // Assertino failure
     assert(i1 != i2);  // Passes, although it's the opposite of 
what I want..
}

What's missing?

"Dan" <dbdavidson yahoo.com> writes:

On Wednesday, 5 December 2012 at 00:17:05 UTC, deed wrote:
 interface I
 {
     bool opEquals(I i);
 }

 class C : I
 {
     bool opEquals(I i)
     {
         return true;
     }
 }

 void main()
 {
     I i1 = new C;
     I i2 = new C;
     assert(i1 == i2);  // Assertino failure
     assert(i1 != i2);  // Passes, although it's the opposite of 
 what I want..
 }

 What's missing?


It looks like you want the opEquals to be called and it is not. 
Match the signature of it to what is in object.di. This may be 
what you want.
----------------------------------

import std.stdio;
interface I
{
   bool opEquals(Object i);
}

class C : I
{
   override bool opEquals(Object i) const
   {
     writeln("Called");
     return true;
   }
}

void main()
{
   I i1 = new C;
   I i2 = new C;
   writeln(i1 == i2);
   writeln(i1 != i2);
}