more flexible partial application

Are there any subtle reasons for why something like the following couldn't be allowed?

foo x y z w = ... bar x w = foo x _ _ w

I.e. a more flexible version of partial application. This would be translated too

bar x w = \y z -> foo x y z w

I.e a function which takes the "_" parameters in the same order they were encountered in the function application. Some other languages allow this, such as Nemerle. Quite handy. /S -- Sebastian Sylvan +46(0)736-818655 UIN: 44640862