On Thu, Oct 22, 2009 at 19:44, Ian Lynagh wrote:

On Wed, Oct 21, 2009 at 09:36:55AM +0200, Martijn van Steenbergen wrote:
> So the current idea is:
>
>> withTrace :: Show a => a -> a
>> withTrace x = trace (show x) x
>

> Does anyone have anything else to add?

I would expect

withTrace :: Show a => String -> a -> a
withTrace str x = trace (str ++ show x) x

to be more useful.

I agree. It's easy enough to do withTrace "" if you don't want a message.

Sean