I like the "to" template a lot, but sometimes I want to make sure beforehand that a call to it works. Is there anything in phobos in missed to do that. And I don't want to try catch.

On Thursday, 11 September 2014 at 08:58:09 UTC, Robert burner Schadek wrote:
> I like the "to" template a lot, but sometimes I want to make sure beforehand that a call to it works. Is there anything in phobos in missed to do that. And I don't want to try catch.

There's an open request for it, and plans to have a "bool maybeTo!(OUT, WHAT)(WHAT what, ref OUT out)", but we aren't quite there yet.

The idea is that *once* we have that, then "to" would simply become an "enforce!maybeTo".

But in the meantime, no. you have to trycatch.

On Thursday, 11 September 2014 at 09:10:03 UTC, monarch_dodra wrote:

> There's an open request for it, and plans to have a "bool maybeTo!(OUT, WHAT)(WHAT what, ref OUT out)", but we aren't quite there yet.
>
> The idea is that *once* we have that, then "to" would simply become an "enforce!maybeTo".
>
> But in the meantime, no. you have to trycatch.

thanks for the quick anwser. Is anyone working on it currently?

just for completeness the bugzilla entry is: https://issues.dlang.org/show_bug.cgi?id=6840

On Thursday, 11 September 2014 at 09:33:20 UTC, Robert burner Schadek wrote:
> On Thursday, 11 September 2014 at 09:10:03 UTC, monarch_dodra wrote:
>
>> There's an open request for it, and plans to have a "bool maybeTo!(OUT, WHAT)(WHAT what, ref OUT out)", but we aren't quite there yet.
>>
>> The idea is that *once* we have that, then "to" would simply become an "enforce!maybeTo".
>>
>> But in the meantime, no. you have to trycatch.
>
> thanks for the quick anwser. Is anyone working on it currently?
>
> just for completeness the bugzilla entry is: https://issues.dlang.org/show_bug.cgi?id=6840

Nope, no one (AFAIK).

I think it "only" needs a bit of refactoring std.conv, but it's a pretty damn big module.