ezyang: > Excerpts from Bulat Ziganshin's message of Wed Feb 24 14:48:53 -0500 2010: > > > I'd be really curious about techniques that permit mutation during > > > the construction of functional datastructures; this seems like a cool > > > way to get fast performance w/o giving up any of the benefits of > > > immutability. Unfortunately, my (admittedly short) experiments in > > > this domain ran up against the difficulty that vector didn't let me > > > unsafely freeze its mutable version. :-) > > > > actually, this technique is already used in haskell. look into array > > library sources, search for freeze > > Yup, I'm aware of this. In fact, vector has thaw/freeze functions for > itself, although it doesn't export them. I'd rather not have to reimplement > vector just to get this unsafe mutation capability tough (and since the > mutable array GC problem is not fixed for the version of GHC I'm on, I'd > likely > see no benefit either).
These are exported from vector, though. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
