Re: [Haskell-cafe] Questions about haskell CPP macros

{-# LANGUAGE CPP #-} main = putStrLn (__FILE__ ++ ":" ++ show __LINE__)

This outputs: test.hs:2

if I had a module Foo.Bar.Car.MyModule, I would like to be able to output something like this on error: Foo.Bar.Car.MyModule:2

It works for me. If you place that text in Try/Me.hs and call ghc -E Try/Me.hs you get Try/Me.hs:2 If you just want to turn slashes into dots, and remove the suffix, that is a simple exercise in Haskell itself main = putStrLn (mangle __FILE__) where mangle ('/':cs) = '.': mangle cs mangle ..... Regards, Malcolm