[rust-dev] how to call closures stored in struct slots (a 0.5 question)

Steve Jenson stevej at fruitless.org
Sat Dec 22 10:32:48 PST 2012


Yes, that's it!

Are these migration-related questions suited for this list or should I use
github issues?

thanks again,
steve


On Sat, Dec 22, 2012 at 10:28 AM, Tim Chevalier <catamorphism at gmail.com>wrote:

> On Sat, Dec 22, 2012 at 10:27 AM, Steve Jenson <stevej at fruitless.org>
> wrote:
> > In 0.4, I had a struct that stored a fn that I later called as if it
> were a
> > method. In 0.5, this has ceased. what is the new syntax for calling
> > functions stored in slots?
> >
> > Here's the small code example (please excuse how naive it is):
> >
> > https://github.com/stevej/rustled/blob/master/lazy.rs#L28
> >
> > and here is the 0.5 compiler error I receive:
> >
> > lazy.rs:28:21: 28:33 error: type `lazy::Lazy<'a>` does not implement any
> > method in scope named `code`
> > lazy.rs:28         let result = self.code();
>
> (Warning: not tested.) I believe the way to do this is to write:
>
> let result = (self.code)();
>
> Cheers,
> Tim
>
>
>
> --
> Tim Chevalier * http://catamorphism.org/ * Often in error, never in doubt
> "We know there'd hardly be no one in prison / If rights to food,
> clothes, and shelter were given." -- Boots Riley
>
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