Mercurial > urweb

view tests/option.ur @ 2174:ce312cad5ecd

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use correct OpenSSL thread safety macros on OS X (closes #209) Create an Autoconf test to determine if pthread_t is a pointer or scalar type, and use the appropriate CRYPTO_THREADID_set macro based on the result.
author Benjamin Barenblat <bbaren at mit.edu>
date Sun, 20 Sep 2015 17:46:07 -0400
parents 77a28e7430bf
children
line wrap: on
line source
datatype option a = None | Some of a

val none_Hi : option string = None
val some_Hi = Some "Hi"
val none_some_Hi : option (option string) = None
val some_some_Hi = Some some_Hi

val show = fn x => case x of None => "None" | Some x => x

val show2 = fn x => case x of None => "None'" | Some x => show x

val page = fn x => return <html><body>
        {cdata (show x)}
</body></html>

val page2 = fn x => return <html><body>
        {cdata (show2 x)}
</body></html>

val main : unit -> transaction page = fn () => return <html><body>
        <li><a link={page none_Hi}>None1</a></li>
        <li><a link={page some_Hi}>Some1</a></li>
        <li><a link={page2 none_some_Hi}>None2</a></li>
        <li><a link={page2 some_some_Hi}>Some2</a></li>
</body></html>