Re: [Boost-users] [counting_range] why?

Subject: Re: [Boost-users] [counting_range] why?
From: Jeffrey Lee Hellrung, Jr. (jeffrey.hellrung_at_[hidden])
Date: 2012-11-28 13:11:55

On Wed, Nov 28, 2012 at 10:05 AM, Robert Jones <robertgbjones_at_[hidden]>wrote:

>
>
> On Wed, Nov 28, 2012 at 5:56 PM, Jeffrey Lee Hellrung, Jr. <
> jeffrey.hellrung_at_[hidden]> wrote:
>
>>
>> Looks like gcc is instantiating the unary overloads of counting_range
>> (with template parameter int) even though you're supplying 2
>> arguments...I'm not sure if that is standard behavior or not; MSVC9 seems
>> to do okay with it.
>>
>> Is this is a real hindrance or merely curiosity?
>>
>>
> More curiosity now, as I can do what I need to do, but where I started
> from was...
>
> counting_range<unsigned>( 0, 3 )
>
> So using arguments of type int, in a range of type unsigned, which doesn't
> work. I can of course do
>
> counting_range( 0U, 3U )
>
> to get the same effect, but it's a bit inelegant!
>
> I haven't investigated what counting_range( 0U, 3 ) does!
>

Probably won't work :)

Sounds like your initial use case *should* be okay (seems to work on clang
and msvc) and your version of gcc is incorrect in rejecting it. Consider
reducing your use case down to be Boost-independent and filing a bug with
gcc.

- Jeff