Conor McBride wrote:
On 15 May 2009, at 09:11, Sittampalam, Ganesh wrote:
but then pattern matching can introduce Eq constraints which some might see as a bit odd.
Doesn't seem that odd to me. Plenty of other language features come with constraints attached.
It's the introduction of a constraint from tweaking a pattern that is odd, I think. By way of precedent H98 rejected this kind of idea in favour of putting 'fail' into Monad. Ganesh =============================================================================== Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html ===============================================================================