Problem overloading operator for a struct with an immutable member

[ketmar via Digitalmars-d-learn]

On Thu, 26 Mar 2015 09:02:53 +0000, Nicolas Sicard wrote:

> On Thursday, 26 March 2015 at 04:57:55 UTC, ketmar wrote:
>>
>> by the way. do you know that you still CAN overload postincrement
>> operation? yes, the code is still here, and it works...
>> somethimes. ;-)
> 
> Thnaks. Indeed, this works:
> ---
> struct S {
>      int i;
>      immutable(Object) o;
> 
>      void opAddAssign(int j) { i += j; }
>      S opPostInc() { ++i; return this; }
>      void opAssign(S other) {}
> }
> 
> unittest {
>      S s;
>      ++s;
>      assert(s.i == 1);
>      s++;
>      assert(s.i == 2);
> }
> ---
> 
> Old operator overloading to the rescue !

just make sure you didn't add `opUnary` there, as it will kill 
`opPostInc`.

it worth nothing that `opPostInc` is not deprecated yet. ;-)
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