On 16 April 2010 15:59, zaxis <z_a...@163.com> wrote: > > instance (BinaryDefer a, BinaryDefer b) => BinaryDefer (a,b) where > put (a,b) = put2 a b > get = get2 (,) > size x = let ~(a,b) = x in size a + size b > putFixed (a,b) = putFixed2 a b > getFixed = getFixed2 (,) > > in `size` function, what does the `~` mean ?
A lazy pattern match: http://en.wikibooks.org/wiki/Haskell/Laziness (there is a better name for it, but I can't remember). -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
