Congratulations to the D Team!

[Walter Bright]

On 7/9/2012 3:27 PM, Jakob Ovrum wrote:
> This opEquals is only logically constant, not bitwise constant, hence it must
> not be const; similar to the caching scenario. Just trying to demonstrate that
> the issue is bigger than just caching - it's any logically constant comparison
> function.

I understand, but the downside of not making these functions const is it will 
torpedo the use of functional style programming in D.

A straightforward workaround is to use PIMPL to encapsulate the logical const 
stuff, and then cast the reference to const to use inside the opEquals.