On Sat, Dec 24, 2011 at 7:15 AM, Duncan Coutts <duncan.cou...@googlemail.com> wrote: > On 23 December 2011 20:09, Stefan Holdermans <ste...@vectorfabrics.com> wrote: >>> Here are the kinds of the type constructors: >>> >>> (,,) :: * -> * -> * -> * >>> (,) :: * -> * -> * >>> () :: * >>> >>> (# ,, #) :: * -> * -> * -> # >>> (# , #) :: * -> * -> # >>> BUT >>> (# #) :: * -> # >> >> Just of out curiosity, what would be a compelling use case for singleton and >> unit unboxed tuples? > > For singleton unboxed tuples, any situation where you want to return a > single value but not force its evaluation. This occurs for example > with some low level functions in the implementation of ordinary lazy > arrays.
How is that different from returning a normal value? -- Dave Menendez <d...@zednenem.com> <http://www.eyrie.org/~zednenem/> _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
