Re: [Vala] Proposal for an improved delegate/lambda handling

["Christian Hergert" <christian hergert gmail com>]

I like it. Might get confusing if someone wanted to mix direct
delegates and anonymous ones though.

-- Christian

On Sat, Oct 18, 2008 at 4:14 PM, Yu Feng <rainwoodman gmail com> wrote:
> On Sat, 2008-10-18 at 22:57 +0200, Ali Sabil wrote:
> > Hi all,
> >
> > I would like to start a discussion about a small syntactic sugar
> > addition to Vala, that would in my opinion slightly improve the
> > situation with asynchronous code. The following code sample should be
> > self explanatory about my proposal:
> >
> > delegate bool HttpResponseCallback (string response);
> >
> > public class HttpClient : Object {
> >     public void post_request (string request, HttpResponseCallback cb)
> > {
> >         cb ("Hello world");
> >     }
> > }
> >
> > // Current State
> > var client = new HttpClient ();
> > client.post_request("GET ....",  (response) => {
> >         debug ("got response %s", response);
> >         return true;
> >     }
> > );
> >
> >
> > // Proposed syntax:
> > // Vala would basically use the "pseudo-lambda" expression
> > // following the method call as a parameter to the method call
> > client.post_request("GET ....") (string response) {
>
> What about
> client.post_request("GET ..."):
> (response) => {
>   ....
> },
> (second_callback) => {
>    ....
> };
>
> Adding the colon and commas might ease the parser.
>
>
> >     debug ("got response %s", response);
> >     return true;
> > }
> >
> >
> > I am very open to comments and suggestions.
> >
> > Cheers,
> >
> > --
> > Ali
> >
> > _______________________________________________
> > Vala-list mailing list
> > Vala-list gnome org
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>
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