Const sucks

[Walter Bright]

Bruno Medeiros wrote:
> Walter Bright wrote:
>> What, exactly, is the use case that needs a solution?
> 
> Before hand, let me just say that by broken, I didn't mean subvertable, 
> but rather that using const/invariant with classes would be impractical 
> and unmanageable.
> 
> Simple example: Let's say you have a class Foo that is comparable. How 
> do you sort an array of const(Foo)'s ?
> 
>   const(Foo)[] sort(const(Foo)[] arr) {
>      ... ?
> The sorting algorithm doesn't matter, what matters is: how would one 
> swap two elements in the array?

You can't sort an (array of)(const T). You can sort an (array 
of)(something of)(const T).