7 Sep
2012
7 Sep
'12
2 a.m.
Haskell already does this, to some extent, in the design of imprecise exceptions. But note that bottom *does* have well defined behavior, so these "optimizations" are not very desirable. Edward Excerpts from David Feuer's message of Thu Sep 06 19:35:43 -0400 2012:
I have no plans to do such a thing anytime soon, but is there a way to tell GHC to allow nasal demons to fly if the program forces bottom? This mode of operation would seem to be a useful optimization when compiling a program produced by Coq or similar, enabling various transformations that can turn bottom into non-bottom, eliminating runtime checks in incomplete patterns, etc.