Mercurial > urweb
annotate demo/url.ur @ 2184:1ecef02f67c5
More Elaborate work to avoid instantiating unification variables with out-of-scope regular variables
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Sat, 24 Oct 2015 17:23:07 -0400 |
| parents | 412ccd97ab71 |
| children |
| rev | line source |
|---|---|
| adamc@774 | 1 fun yourChoice r = return <xml><body> |
| adamc@774 | 2 {case checkUrl r.Url of |
| adamc@774 | 3 None => <xml>You aren't allowed to link to there.</xml> |
| adamc@774 | 4 | Some url => <xml><a href={url}>Enjoy!</a></xml>} |
| adamc@774 | 5 </body></xml> |
| adamc@774 | 6 |
| adamc@774 | 7 fun main () = return <xml><body> |
| adamc@774 | 8 <a href="http://en.wikipedia.org/wiki/Type_inference">Learn something</a><br/> |
| adamc@774 | 9 <br/> |
| adamc@774 | 10 <form> |
| adamc@774 | 11 URL of your choice: <textbox{#Url}/> <submit action={yourChoice}/> |
| adamc@774 | 12 </form> |
| adamc@774 | 13 </body></xml> |