Re: [Haskell-cafe] How do you make constant expressions?

18 Jul 2010


      On Sunday 18 July 2010 22:19:21, Eitan Goldshtrom wrote:
...
Silly question, but I can't find the answer on the net. I think I'm just
using the wrong words in my search. I'm looking for a way to create
constant expressions in Haskell. The C/C++ equivalent of what I'm
talking about is
#define NAME VALUE
I want an expression, or really just numbers for what I'm doing, that
the compiler will put into the program at the designated places, instead
of storing it in memory like a variable.
-Eitan
Just make a top-level definition

name = value

and if you want to make sure it's inlined,

{-# INLINE name #-}

Or you can use {-# LANGUAGE CPP #-} with the #define

Re: [Haskell-cafe] How do you make constant expressions?

Daniel Fischer