C++ Logo

std-proposals

Advanced search

Re: [std-proposals] Redundant std::begin() and std::end() overloads for std::initializer_list

From: Nikolay Mihaylov <nmmm_at_[hidden]>
Date: Tue, 30 Aug 2022 17:10:28 +0300
Isn't this a specific implementation? e.g. this is related to a vendor, not
to C++ standard?

On Tue, Aug 30, 2022 at 5:05 PM Nikl Kelbon via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> its not useless in case
> begin({1,2,3})
>
> вт, 30 авг. 2022 г. в 18:43, hamburger blacktea via Std-Proposals <
> std-proposals_at_[hidden]>:
>
>> See https://stackoverflow.com/q/25215590. That's an old question (in
>> 2014).
>>
>> So I want to solve it:
>>
>> *Proposed resolution:*
>>
>>
>> 1. Remove 17.11.5 [support.initlist.range]:
>>
>> template<class E> constexpr const E* begin(initializer_list<E> il)
>> noexcept;
>> -1- Returns: il.begin().
>> template<class E> constexpr const E* end(initializer_list<E> il) noexcept;
>> -2- Returns: il.end()
>>
>>
>> 2. Modify 17.11.2 [initializer.list.syn] as indicated:
>>
>> // all freestanding
>> namespace std {
>> template<class E> class initializer_list {
>> public:
>> using value_type = E;
>> using reference = const E&;
>> using const_reference = const E&;
>> using size_type = size_t;
>>
>> using iterator = const E*;
>> using const_iterator = const E*;
>>
>> constexpr initializer_list() noexcept;
>>
>> constexpr size_t size() const noexcept; // number of elements
>> constexpr const E* begin() const noexcept; // first element
>> constexpr const E* end() const noexcept; // one past the last
>> element
>> };
>>
>> // [support.initlist.range], initializer list range access
>> template<class E> constexpr const E* begin(initializer_list<E> il)
>> noexcept;
>> template<class E> constexpr const E* end(initializer_list<E> il)
>> noexcept;
>> }
>>
>> I tried submitting it as a standard library issue, but the LWG chair said
>> it needed a proposal. Can someone help?
>>
>> --
>> Std-Proposals mailing list
>> Std-Proposals_at_[hidden]
>> https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals
>>
> --
> Std-Proposals mailing list
> Std-Proposals_at_[hidden]
> https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals
>

Received on 2022-08-30 14:11:06