Hi Jake

Many thanks for the reply

We just have some logs like :-

file.txt: fast_enabled: 0

and I preferred the readability of:
file.txt: fast_enabled: true

Also, good to write out configuration files as 'true', rather than '1'

Cheers, Jonny


On 20/07/2019 22:05, Jake Arkinstall wrote:
> The format library has just been confirmed for C++20. It handles
> booleans as you require.
>
> However, on a semantic note the strings "true" and "false" are rarely
> applicative to the actual meaning the bool represents, and as such the
> easy approach of adding it directly into a string will rarely be useful.
>
>
> On Sat, 20 Jul 2019, 21:39 Jonny Grant via Std-Proposals,
> <std-proposals_at_[hidden]
> <mailto:std-proposals_at_[hidden]>> wrote:
>
> Hi Garrett
>
> Many thanks for your reply.
>
> Yes, I see std::boolalpha sets an I/O flag.. but seems a bit of a
> long way to get it into a string, I'd need to use in conjunction
> with std::istringstream to get a string...
>
> I wanted to do something like this example:
>
> *Idea*
> std::string fmt(const std::string header, bool b)
> {
> return header + " " + std::to_string(b) + " set";
> }
>
> *How I would do now*
> As his doesn't work, I'd have it at present as:
> std::string fmt(const std::string header, bool b)
> {
> return header + " " + b?"true":"false" + " set";
> }
>
>
> Regards, Jonny
>
>
> On 20/07/2019 21:21, Garrett May via Std-Proposals wrote:
>> std::boolalpha is already available:
>>
>> int main(){
>> bool const a = true;
>> std::cout << std::boolalpha << a << std::endl;
>> }
>>
>> My gut instinct here is that one is supposed to control how one
>> wants data to be printed out, in the same way as how float/double
>> precision is done.
>>
>>
>> On Sat, 20 Jul 2019, 21:16 Jonny Grant via Std-Proposals,
>> <std-proposals_at_[hidden]
>> <mailto:std-proposals_at_[hidden]>> wrote:
>>
>> Hello
>>
>> Could std::string to_string(bool value); be added? Currently
>> it outputs
>> as a number due to the implicit conversion to int?
>> Feel it would have been more appropriate as "true" or "false".
>>
>> http://www.cplusplus.com/reference/string/to_string/
>>
>> $ g++-8 -Wall -o to_string to_string.cpp
>> $ ./to_string
>> 1
>>
>>
>>
>> // g++-8 -Wall -o to_string to_string.cpp
>> #include <string>
>> #include <iostream>
>> int main()
>> {
>> const bool a = true;
>> const std::string b(std::to_string(a));
>> std::cout << b << std::endl;
>> }
>>
>> Cheers, Jonny
>>
>>
>>
>> .
>>
>>
>> --
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>> <mailto:Std-Proposals_at_[hidden]>
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>>
>>
>
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