file-location

Common debugging/error/exception functions that give file location information Notice how it displays package:module file:line:character It exposes the functions err (error), undef (undefined), and trc (Debug.Trace.trace). All of these behave the same as their normal counterpart but also spit out a location. Here is my favorite helper, debug, which is like trace but just show the value. And The Template Haskell version. Also there is a version of thrwIO that gives location information See module for a listing of all the functions with short descriptions, and the homepage for some more examples https:github.comgregwebsErrorLocation.hs