On Thu, Feb 3, 2011 at 3:09 PM, Patrick Lynch wrote:

...I'm using the book "Real World Haskell"... ...In Chapter 22, it uses two files, namely: ...\ch22\PodDB.hs and ...\ch22\PodTypes.hs.

...This is the calling code in PodDB.hs:    {-- snippet all --}    module PodDB where    import Database.HDBC    import Database.HDBC.Sqlite3    import PodTypes

...I was instructed to start ghci and invoke the command: ...> :load C:\Users\User\Downloads\rwh-examples2\examples\ch22\poddb.hs ...this gives the following error message:      C:\Users\User\Downloads\rwh-examples2\examples\ch22\poddb.hs:6:7:      Could not find module `PodTypes':         Use -v to see a list of the files searched for.      Failed, modules loaded: none.

...I then tried the command: :l C:\Users\User\Downloads\rwh-examples2\examples\ch22\poddb.hs C:\Users\User\Downloads\rwh-examples2\examples\ch22\podtypes.hs ...it loaded both files...

...is there someway to modify the code in PodDB.hs that would allow me to simply invoke the command, as mentioned by the author, :load PodDB.hs?

Thank you

Does "cd C:\Users\User\Downloads\rwh-examples2\examples\ch22" before launching GHCi work? You could also use the -i parameter for GHCi - it tells GHCi to look in the specified directory for source files. You won't be able to modify the code to do this - the notion that a Haskell module corresponds to a file on disk (and that there is a naming convention for this correspondence) isn't addressed in the language definition. This is why Haskell libraries on Hackage ship with meta-data describing the layout of the source files for the library. Antoine

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