diff options
Diffstat (limited to 'src/GF/Printing/PrintParser.hs')
| -rw-r--r-- | src/GF/Printing/PrintParser.hs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/GF/Printing/PrintParser.hs b/src/GF/Printing/PrintParser.hs index 3971f0a40..0869bf685 100644 --- a/src/GF/Printing/PrintParser.hs +++ b/src/GF/Printing/PrintParser.hs @@ -5,9 +5,9 @@ -- Stability : (stable) -- Portability : (portable) -- --- > CVS $Date: 2005/03/21 14:17:44 $ +-- > CVS $Date: 2005/03/29 11:17:56 $ -- > CVS $Author: peb $ --- > CVS $Revision: 1.1 $ +-- > CVS $Revision: 1.2 $ -- -- Pretty-printing of parser objects ----------------------------------------------------------------------------- @@ -69,6 +69,10 @@ instance Print Int where instance Print Integer where prt = show +instance Print a => Print (Maybe a) where + prt (Just a) = "!" ++ prt a + prt Nothing = "Nothing" + instance Print a => Print (Err a) where prt (Ok a) = prt a prt (Bad str) = str |