How do we best make sure {Int,Word,Float,Double} to {Int,Word,Float,Double} conversions stay efficient

Sean Leather leather at
Fri Dec 14 23:12:54 CET 2012

On Fri, Dec 14, 2012 at 10:47 PM, Ian Lynagh wrote:

> On Fri, Dec 14, 2012 at 04:34:29PM -0500, Carter Schonwald wrote:
> > A related question I have is that I've some code that will map the
> > singleton Nats to Ints, and last time I looked into this/ had a chat on
> the
> > ghc-users list, it sounded like sometimes having Integer values
> constructed
> > in between are unavoidable.  Is that still the case with post 7.6.1 ghc?
> > (And or, how might I be able to help?)
> I don't know what a singleton Nat is, but if you mean Word then that's
> what Johan's been working on.

I'm guessing Carter means Sing Nat:

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