Re: [Haskell-cafe] New-bee question about seq in Parsec.Pos

Christoph Bauer writes:

data SourcePos = SourcePos SourceName !Line !Column deriving (Eq,Ord)

My poor haskell knowledge says me, that Line and Column is always strict.

Yes.

So, what does the following function?

forcePos :: SourcePos -> SourcePos forcePos pos@(SourcePos name line column) = seq line (seq column (pos))

AFAICT, nothing. My guess would be that it's an oversight (for instance, it could be a remnant from a prevoius version where the data type was non-strict). Is 'forcePos' used much in the code? -k -- If I haven't seen further, it is by standing in the footprints of giants