Did you mean () => processForm by chance? () -> processForm is a pair
of () and processForm's result.
-Ross
On Oct 27, 2009, at 2:52 AM, Strom wrote:
>
> I'm not sure if this is a scala or a lift related question, but when I
> try to bind a submit button, I'm having some confusion on using zero
> parameter functions as the "() -> Any" parameter in the submit
> signature.
>
> The signature for the method in question is
> SHtml.submit(value : String, func : () => Any, attrs : (String,
> String)
> *)
>
> 1. My first question is about the following method definitions
> def processForm () : Unit = {...}
> vs
> def processForm = {...} //no parentheses after method declaration
>
> Why can I call "processForm" as well as "processForm()" for the first
> example, but only "processForm" for the second example. If there is
> scala/lift documentation on this simple question?
>
> 2. Why do I get a compiler error when I use the following code:
> bind( ...
> "submit" -> SHtml.submit( "Process Form", processForm() ) /*type
> mismatch error*/
> )
> vs
> bind( ...
> "submit" -> SHtml.submit( "Process Form", processForm ) /*compiles
> successfully*/
> )
>
> It's my impression that the above bind calls are equivalent given the
> way the scala compiler behaves when I call "processForm" or
> "processForm()".
>
> Also, I wasn't even sure the method itself would allow the code to
> compile. I thought I'd have to do "() -> processForm" or "() ->
> processForm()".
>
>
> The error I was getting was this:
> error type mismatch
> found : Unit
> required : () -> Any
>
> Can someone please clarify? Thanks so much.
>
> >
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