On Tue, Jun 1, 2010 at 10:30 AM, Gery Debongnie <gery.debong...@gmail.com> wrote: > 3. Perform a reading of the font metrics file in the main program, put > the results into some FontMetrics object, and give that to stringWidth > :: FontMetrics -> Font -> String -> Double. Pros : allow me to avoid > problems of solution 1 and 2, cons : it doesn't sound right for the > main program to have to do this, it should be confined into a Font > module.
Ultimately all your IO is driven from main, so don't be afraid to add more IO dependencies to it. You can let IO "infect" a module for dealing with font files (e.g. a FontMetrics module with a function getMetrics :: [String] -> Map String Double), then drive that module from main and feed its results into your pure code. Anthony _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
