Re: [Haskell-cafe] Calling function with unknown number and type arguments

On Sun, Aug 16, 2009 at 3:07 PM, Sean Leather wrote:

On Sun, Aug 16, 2009 at 17:00, Brandon S. Allbery wrote:

...

On Aug 16, 2009, at 06:45 , Maciej Piechotka wrote:

...

I have to write a function which calls a function with unknown (i.e. given in runtime) number and type of arguments.

Take a look at the implementation of Text.Printf.

Or Text.XFormat.Show in xformat while you're at it. (Warning: blatant self-promoting.)

  http://hackage.haskell.org/package/xformat

From the tests in the package:

  showf (Show % Int % String) 4.05 20 " blah" == "4.0520 blah"   showf (Wrap '(' Int ')') 24 == "(24)"

But with those, the number of arguments is still known at compile time, correct? Antoine