On Sat, Dec 7, 2013 at 2:01 AM, spir <denis.s...@gmail.com> wrote:
> On 12/07/2013 01:12 AM, Gaetan wrote:
>>
>> I am in favor of two version of the api: from_str which has already done
>> the unwrap, and a from_str_safe for instance that returns a Result or
>> option.
>
> This provides the important semantic information (that I've evoked at the
> end end of a long earlier reply in this thread) of whether func failure is
> expected and belongs to the logic of the present app and we must deal with
> it, or not.
>
> But I'm still shared on this topic for finding it also annoying, like Simon,
> to have to duplicate whole catogories of such funcs (of which we cannot know
> in advance whther they'll fail or not), if only the interface as apparently
> proposed by Gaëtan.
Syntax sugar like this would be nice:
let str = std::str::from_utf8("Parse this optimistically, and fail otherwise");
// str is a string or the task fails
vs.
let opt_str = std::str::from_utf?("Parse this if valid"); // note the
question mark
if opt_str.is_some() { .... }
Problem is, this sounds scary to implement at the compiler level, if
it's possible at all :) I am just throwing it out there for others to
judge.
Cheers
--
Jordi Boggiano
@seldaek - http://nelm.io/jordi
_______________________________________________
Rust-dev mailing list
Rust-dev@mozilla.org
https://mail.mozilla.org/listinfo/rust-dev
