> Yes, that's a good point. So there are really three issues: > a) single-threaded-ness > b) making sure you look up in the right map > c) making sure the thing you find has the right type > > Even if you have typed keys, (Key a), then if you look them up in the > wrong map, any guarantee that it maps to a value of type 'a' is out of > the window.
Not true, if you use the finite map implementation based on dynamics. Here, the story is: with single-threaded-ness you can omit the dynamic type checks (they are guaranteed to succeed); if you use finite maps in a persistent manner, this is no longer true. Cheers, Ralf _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
