Mercurial > urweb
view tests/stypes.ur @ 802:ef6de4075dc1
Fix a Core_untangle bug that missed closure variable references; XHTMLize
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sat, 16 May 2009 12:41:33 -0400 |
parents | 102e81d975e3 |
children |
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datatype color = Red | White | Blue fun c2s c = case c of Red => "Red" | White => "White" | Blue => "Blue" val show_color = mkShow c2s datatype list a = Nil | Cons of a * list a fun isNil (t ::: Type) (ls : list t) = case ls of Nil => True | _ => False fun delist (ls : list string) : xml body [] [] = case ls of Nil => <xml>Nil</xml> | Cons (h, t) => <xml>{[h]} :: {delist t}</xml> fun main () : transaction page = sInt <- source 0; sFloat <- source 1.23; sBoth <- source (7, 42.1); sOpt <- source None; sBool <- source True; sColor <- source White; sList <- source Nil; return <xml><body> <dyn signal={n <- signal sInt; return <xml>{[n + 3]}</xml>}/> <a onclick={set sInt 1}>Change</a><br/> <dyn signal={n <- signal sFloat; return <xml>{[n + 1.0]}</xml>}/> <a onclick={set sFloat 4.56}>Change</a><br/> <dyn signal={p <- signal sBoth; return <xml>{[p.1]}, {[p.2]}</xml>}/>; <dyn signal={p <- signal sBoth; case p of (7, _) => return <xml>Initial</xml> | (fst, snd) => return <xml>{[fst]}, {[snd]}</xml>}/> <a onclick={set sBoth (8, 100.001)}>Change</a><br/> <dyn signal={o <- signal sOpt; case o of None => return <xml>None</xml> | Some n => return <xml>{[n]}</xml>}/> <a onclick={set sOpt (Some 7)}>Change</a><br/> <dyn signal={b <- signal sBool; return <xml>{[b]}</xml>}/> <dyn signal={b <- signal sBool; if b then return <xml>Yes</xml> else return <xml>No</xml>}/> <a onclick={set sBool False}>Change</a><br/> <dyn signal={c <- signal sColor; return <xml>{[c]}</xml>}/> <a onclick={set sColor Red}>Red</a> <a onclick={set sColor White}>White</a> <a onclick={set sColor Blue}>Blue</a><br/> <dyn signal={ls <- signal sList; return <xml>{[isNil ls]}</xml>}/>; <dyn signal={ls <- signal sList; return <xml>{delist ls}</xml>}/> <a onclick={set sList (Cons ("A", Cons ("B", Nil)))}>Change</a><br/> </body></xml>