Re: [Haskell-cafe] Printing functions

Creighton Hogg wrote:

Hi, I'm working on writing a genetic programming system in Haskell, and I wanted to know what might be a good way to print out the programs that are being generated. There's no instance of Show for functions, but I'd really like to see what's happening so that I know if it's working right. What should I try?

One way would be to, instead of generating Haskell functions directly (I guess this is what you are doing), declare an algebraic data type with constructors for the various basic functions that you use (again I'm guessing as to how you are doing this). Then you can have a Show instance for that type, and a function for producing a real function from a value of your type. /Björn