On Thu, 5 Oct 2023, 12:53 Jonathan Sweemer via Std-Proposals, <
std-proposals_at_[hidden]> wrote:

> I would say yes, if the general consensus is that std::to_string is useful
> and should not be deprecated, then at least it should be made more generic.
>
> The current list of overloads for std::to_string seems a bit arbitrary and
> incomplete to me, with char being the most error-prone example, as it
> happily binds to the overload taking int.
>
> If you know you're dealing with ints, then I agree that std::to_string
> provides a more simple syntax for converting to a string, but in any
> generic code you either have to use std::format (i.e. forget about
> std::to_string), or do something like the following to delegate between the
> two:
>
> template<typename T>
> concept to_stringable =
>

requires(const T& t) {
  { std::to_string(t) } -> std::same_as<std::string>;
};

  std::is_same_v<T, int> ||
> std::is_same_v<T, long> ||
> std::is_same_v<T, long long> ||
> std::is_same_v<T, unsigned> ||
> std::is_same_v<T, unsigned long> ||
> std::is_same_v<T, unsigned long long> ||
> std::is_same_v<T, float> ||
> std::is_same_v<T, double> ||
> std::is_same_v<T, long double>;
>
> template<typename T>
> auto generic_to_string(const T& t) {
> if constexpr (to_stringable<T>) {
> return std::to_string(t);
> } else {
> return std::format("{}", t);
> }
> }
>
> But the to_stringable concept is very brittle to maintain, because new
> overloads might be added in future versions of the standard, so a truly
> generic version of std::to_string would be more desirable in my view.
>
>
> On Thu, Oct 5, 2023 at 4:56 PM Giuseppe D'Angelo via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
>
>> Il 04/10/23 22:38, Victor Zverovich via Std-Proposals ha scritto:
>> > At the very least std::to_string is a useful shorthand notation for
>> > std::format for numeric types.
>> >
>>
>> But this prompts the question: would it would make sense to have a
>> overload `to_string` taking just any formattable type?
>>
>> Thanks,
>> --
>> Giuseppe D'Angelo
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>> https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals
>>
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