On Tue, Dec 13, 2011 at 2:23 PM, Shakthi Kannan
Hi,
I am trying to read a .cabal find and print the package name and version. Here is the code snippet:
=== Code ===
getName :: FilePath -> IO () getName cabal = do gdesc <- readPackageDescription normal cabal let desc = flattenPackageDescription gdesc final = pkgName $ package desc putStrLn final
=== END ===
=== Output ===
Couldn't match expected type `[Char]' with actual type `PackageName'
=== END ===
I see that the method 'package' from:
http://www.haskell.org/cabal/release/cabal-latest/doc/API/Cabal/Distribution...
allows me to return the PackageIdentifier. Using pkgName returns a PackageName.
http://www.haskell.org/cabal/release/cabal-latest/doc/API/Cabal/Distribution...
But, how can I obtain the string value from it?
Appreciate any help in this regard.
Thanks!
SK
-- Shakthi Kannan http://www.shakthimaan.com
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You need to use pattern patching, e.g.: let PackageName str = pkgName $ ... HTH, Michael