Why D is annoying =P

[H. S. Teoh]

On Wed, Oct 24, 2012 at 10:16:27PM +0200, Mehrdad wrote:
[...]
> struct Set(T)
> {
> 	int[T] dict;
> 	hash_t toHash() const
> 	{
> 		typeof(return) r = 0;
> 		foreach (item; this.dict.keys)
> 		{
> 			???       // what should be here?
> 		}
> 		return r;
> 	}
> }

Try this:

	hash_t toHash() const
	{
		hash_t h = 0;
		foreach (item; this.dict.keys)
		{
			// We use a commutative operation here (+) so
			// that the order of keys don't matter.
			h += hashOf(&item, item.sizeof);
		}
		return h;
	}


T

-- 
What do you get if you drop a piano down a mineshaft? A flat minor.