Roman Cheplyaka:
* Manuel M T Chakravarty <c...@cse.unsw.edu.au> [2009-02-12 12:16:26+1100]
Also - there are several papers which mention foldP as being part of
the (prospective) implementation, but I couldn't find this in any of
the modules.  Has this one not been implemented yet?

Up to now, the implementation of operations in the special-purpose
Prelude and the array library was essentially driven by the examples we
coded so far:

 http://darcs.haskell.org/packages/dph/examples/

So if we didn't actually use a function somewhere, we probably didn't
implement it. Again, the motivation was to get simple examples working
before making any attempt at completing the set of supported language
features or library functions.

It is present here [1] -- so at least it has been implemented.

 1. 
http://www.haskell.org/ghc/docs/latest/html/libraries/base/GHC-PArr.html#v%3AfoldlP

That's an old library, not the one used for vectorised code.

Manuel

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