Data.Data.GenRep.Functions

Intended for internal use: Generic representation of Data vales.

Documentation

mistify :: GenericData -> GenericData

Try to hide some part of the value.

This is used in the evaluation of exercises, when the result is wrong. We would like to show the erroneous part but not the whole result.

numberErrors :: [GenericData] -> ([GenericData], [(String, String)])

Collect and number Error values and replace them by an indexed bottom sign. Repeated errors will get the same number.

getErrorIndex :: String -> State (Int, [(String, String)]) String