Ur/Web: tests/list.ur annotate

Subforms type-checks; lists urlified and unurlified

author	Adam Chlipala <adamc@hcoop.net>
date	Thu, 30 Apr 2009 11:48:56 -0400
parents	fa2019a63ea4
children	9021d44ba6b2

rev	line source
adamc@757	1 fun isNil (t ::: Type) (ls : list t) =
adamc@757	2 case ls of
adamc@757	3 Nil => True
adamc@757	4 \| _ => False
adamc@196	5
adamc@757	6 fun delist (ls : list string) : xbody =
adamc@757	7 case ls of
adamc@757	8 Nil => <xml>Nil</xml>
adamc@757	9 \| Cons (h, t) => <xml>{[h]} :: {delist t}</xml>
adamc@196	10
adamc@758	11 fun callback ls = return <xml><body>
adamc@758	12 {delist ls}
adamc@758	13 </body></xml>
adamc@758	14
adamc@757	15 fun main () = return <xml><body>
adamc@757	16 {[isNil (Nil : list bool)]},
adamc@757	17 {[isNil (Cons (1, Nil))]},
adamc@757	18 {[isNil (Cons ("A", Cons ("B", Nil)))]}
adamc@196	19
adamc@757	20 <p>{delist (Cons ("X", Cons ("Y", Cons ("Z", Nil))))}</p>
adamc@758	21 <a link={callback (Cons ("A", Cons ("B", Nil)))}>Go!</a>
adamc@757	22 </body></xml>

Mercurial > urweb