string and char[]

[Jesse Phillips]

On Fri, 08 Apr 2011 17:40:32 +0400, Denis Koroskin wrote:

> int compare(char[] lhs, char[] rhs) pure {
>      if (lhs < rhs) return 1;
>      if (lhs > rhs) return -1;
>      return 0;
> }
> 
> is not.
> 
> For some reason (bug?), both compile with 2.052.

Purity has nothing to do with the type. "Hello" and a char[] storing 
"Hello" will always produce the same results when passed to this 
function. The fact that it can be changed to "Byelo" does not effect the 
results for when "Hello" is passed in.

I agree that Objects make for great mutable keys, but how can you 
guarantee the hash won't change when the contents change, toHash is 
overridable after all.