view demo/nested.ur @ 1892:907a82a44f01

Add missing inter-library dependencies This is needed, at least on recent Ubuntu, to fix these linker errors when compiling any Ur/Web application: liburweb.so: undefined reference to `lround' liburweb.so: undefined reference to `ceil' liburweb.so: undefined reference to `RAND_bytes' liburweb.so: undefined reference to `DES_fcrypt' liburweb.so: undefined reference to `SHA256_Init' liburweb.so: undefined reference to `SHA256_Final' liburweb.so: undefined reference to `SHA256_Update' Signed-off-by: Anders Kaseorg <andersk@mit.edu> --- src/c/Makefile.am | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
author Anders Kaseorg <andersk@mit.edu>
date Thu, 21 Nov 2013 14:32:11 -0500
parents d4a81273d4b1
children
line wrap: on
line source
fun pageA () = return <xml>
  <head>
    <title>A</title>
  </head>
  <body>
    <form>
      <table>
        <tr>
          <td>Forename:</td>
          <td><textbox{#Forename}/></td>
        </tr>
        <tr>
          <td>Enter a Surname?</td>
          <td><checkbox{#EnterSurname}/></td>
        </tr>
      </table>
      <submit action={fromA} />
    </form>
  </body>
</xml>

and fromA r =
    let
        val forename = r.Forename

        fun pageB () = return <xml>
          <head>
            <title>B</title>
          </head>
          <body>
            <form>
              Surname:
              <textbox{#Surname}/>
              <submit action={pageC'} />
            </form>
            <a link={pageA ()}>Previous</a>
          </body>
        </xml>

        and pageC' r = pageC (Some r.Surname)

        and pageC surname = return <xml>
          <head>
            <title>C</title>
          </head>
          <body>
            <p>Hello {[forename]}{case surname of
                                      None => <xml/>
                                    | Some s => <xml> {[s]}</xml>}</p>
            {case surname of
                 None => <xml><a link={pageA ()}>Previous</a></xml>
               | Some _ => <xml><a link={pageB ()}>Previous</a></xml>}
          </body>
        </xml>
    in
        if r.EnterSurname then
            pageB ()
        else
            pageC None
    end

val main = pageA