 | Haskell Core Libraries (Cabal package) | Contents | Index |
| Distribution.PreProcess |
|
| preprocessSources :: PackageDescription -> LocalBuildInfo -> Int -> [PPSuffixHandler] -> IO () |
| knownSuffixHandlers :: [PPSuffixHandler] |
| ppSuffixes :: [PPSuffixHandler] -> [String] |
| type PPSuffixHandler = (String, BuildInfo -> LocalBuildInfo -> PreProcessor) |
| type PreProcessor = FilePath -> FilePath -> Int -> IO ExitCode |
| removePreprocessed :: [FilePath] -> [String] -> [String] -> IO () |
| removePreprocessedPackage :: PackageDescription -> FilePath -> [String] -> IO () |
| ppCpp :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppCpp' :: [String] -> BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppGreenCard :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppC2hs :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppHsc2hs :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppHappy :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppAlex :: BuildInfo -> LocalBuildInfo -> PreProcessor |
| ppUnlit :: PreProcessor |
| :: PackageDescription | |
| -> LocalBuildInfo | |
| -> Int | verbose |
| -> [PPSuffixHandler] | preprocessors to try |
| -> IO () | |
| Apply preprocessors to the sources from hsSourceDirs, to obtain a Haskell source file for each module. | |
The interface to a preprocessor, which may be implemented using an external program, but need not be. The arguments are the name of the input file, the name of the output file and a verbosity level. Here is a simple example that merely prepends a comment to the given source file:
ppTestHandler :: PreProcessor
ppTestHandler inFile outFile verbose
= do when (verbose > 0) $
putStrLn (inFile++" has been preprocessed to "++outFile)
stuff <- readFile inFile
writeFile outFile ("-- preprocessed as a test\n\n" ++ stuff)
return ExitSuccess
| :: [FilePath] | search Location |
| -> [String] | Modules |
| -> [String] | suffixes |
| -> IO () | |
| Remove the preprocessed .hs files. (do we need to get some .lhs files too?) | |
| :: PackageDescription | |
| -> FilePath | root of source tree (where to look for hsSources) |
| -> [String] | suffixes |
| -> IO () |