I think I'm cool with this too. John: Can you write a proposal addressed
to EWGI? Do you know how? Have you done it before? Let us know if you
need help. -Andrew

On Wed, Apr 26, 2023 at 12:34 PM Barry Revzin via Std-Proposals <
std-proposals_at_[hidden]> wrote:

>
>
> On Mon, Apr 24, 2023, 9:52 AM John Filleau via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
>
>> Floating the idea for Grouped-namespace "using" statements.
>>
>> A grouped-namespace using statement is a shorter way to write multiple
>> using statements that share a parent namespace.
>>
>> using a::b::c::X, a::b::c::Y, a::b::c::Z;
>>
>> can be replaced with
>>
>> using a::b::c::{X, Y, Z};
>>
>> PROBLEM
>>
>> Sometimes I have long namespace names, and I want to alias things from
>> that namespace. The current way to do that requires me to retype the
>> namespace a lot. See above.
>>
>> This is annoying at time-of-writing because of the repetition and
>> opportunity for typos. This is annoying at time-of-maintenance when
>> namespace names change.
>>
>> SOLUTION
>>
>> Allow grouped-namespace using statements as seen above.
>>
>> BENEFIT
>>
>> 100% ergonomics.
>>
>> This solves no interesting computer science problems, nor does it
>> introduce world peace.
>>
>> DOWNSIDES
>>
>> I have 0 understanding of the edge cases around this. I just know I want
>> it. If other people want it, we should make it part of the standard.
>>
>> COST
>>
>> One more thing that implementations have to handle.
>>
>
> I like this idea. Saves on repeating the namespace, which has very little
> benefit at that point. Plus it's common for people to just avoid using
> namespace in preference to using declarations, which are quite verbose
> today due to the namespace repetition.
>
> Even if the namespace is short, like:
>
> using std::cout, std::endl;
>
> This kind of stuff adds up fast, and
>
> using std::{cout, endl};
>
> is just clearer.
>
> You can't have a { after :: today, so there's no ambiguity. This does make
> parsing a using declaration more complicated, since it's no longer just a
> sequence of qualiifed-ids, but it's probably not exceedingly difficult.
>
> Barry
>
>> --
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