Ur/Web: tests/recBad.ur annotate

Add a new scoping check for unification variables, to fix a type inference bug

author	Adam Chlipala <adam@chlipala.net>
date	Sun, 18 Dec 2011 11:29:13 -0500
parents	71bafe66dbe1
children

rev	line source
adamc@238	1 datatype list a = Nil \| Cons of a * list a
adamc@238	2
adamc@242	3 fun append (t ::: Type) (ls1 : list t) (ls2 : list t) : list t =
adamc@238	4 case ls1 of
adamc@238	5 Nil => ls2
adamc@238	6 \| Cons (h, t) => Cons (h, append t ls2)
adamc@238	7
adamc@238	8 (val rec ones : list int = Cons (1, ones))
adamc@239	9 val rec ones = fn () => Cons (1, ones ())

Mercurial > urweb