Re: [Haskell-cafe] Is using Data.Dynamic considered a no-go?

bugfact:

Haskell seems to have pretty strong support for dynamic casting using Data.Typeable and Data.Dynamic.

All kinds of funky dynamic programming seems to be possible with these "hacks".

Is this considered as being as bad as - say - unsafePerformIO? What kind of evil is lurking here?

Inefficiencies and runtime errors? -- Don