[Haskell-cafe] Non polymorphic numerals option -- avoiding type classes

[Roman Cheplyaka]

* Rustom Mody <rustompmody at gmail.com> [2012-12-27 22:18:15+0530]
> But now we are in for new surprises:  Try out
> f x y = x / y
> Prelude> :l f
> [1 of 1] Compiling Main             ( f.hs, interpreted )
> 
> f.hs:1:11: Not in scope: `/'
> Failed, modules loaded: none.
> Prelude> (/)

It's because RebindableSyntax implies NoImplicitPrelude. This is not an
issue if you only work in the interpreter (you can put "import Prelude
hiding (fromInteger)" in .ghci), but you'd also need to put that into
every source file that you wish to load.

An alternative would be to create your own Prelude (or use an existing
one, like [1]) and use it instead of the one defined in base (by hiding
base and exposing a different package).

[1]: http://hackage.haskell.org/packages/archive/simpleprelude/1.0.1.3/doc/html/Prelude.html

Roman