Re: [Haskell-cafe] pointer equality

On 7/20/11 5:08 PM, Paul Johnson wrote:

I would have thought that the compiler, as a matter of optimisation, could insert a check to see if (==) is comparing an object with itself. The only way I can see this breaking is with perverse instances of Eq that would return False for "f == f".

Like the instance for Double (where f = NaN)? -- Live well, ~wren