how to compare immutable ints?

[Charles Hixson]

On 06/18/2013 12:40 PM, Steven Schveighoffer wrote:
> On Tue, 18 Jun 2013 15:37:44 -0400, Charles Hixson 
> <charleshixsn at earthlink.net> wrote:
>
>> (Sorry if this double posts.  I'm having trouble getting through at 
>> all.)
>>
>> How should I compare immutable ints to ensure that they are actually 
>> equal?
>>
>> I was quite surprised to receive the following error message:
>>
>> cbt2.d(732): Error: function object.Object.opEquals (Object o) is not 
>> callable using argument types (immutable(int))
>>
>> when I tried to assert that two values were equal.  They were (should 
>> be), indeed, immutable ints, but I'd prefer that I could check that 
>> they were equivalent without printing them both out.  (I'm having a 
>> bit of trouble keeping my logic straight, so I'm trying to assert 
>> many things that should obviously be true.  And sometimes I've been 
>> surprised.)
>>
>
> The error quoted above suggests you are trying to compare an object 
> type with an int.  Can you give some more context?  You can do that, 
> but you have to overload opEquals.
>
> -Steve
Thanks.  That was the answer I couldn't see.  I read it as complaining 
about comparing two immutable ints, but
assert (nodes[root2.pg.pgNo] == root2.pg.pgNo);
should have read
assert (nodes[root2.pg.pgNo].pg.pgNo == root2.pg.pgNo);


-- 
Charles Hixson