Re: [boost] Checking interest in to_string functions

Subject: Re: [boost] Checking interest in to_string functions
From: John Bytheway (jbytheway+boost_at_[hidden])
Date: 2011-09-30 14:00:25

On 30/09/11 09:35, Mathias Gaunard wrote:
> On 30/09/2011 06:20, Antony Polukhin wrote:
>> As was mentioned in `[boost] to_string(v)`
>> 1) Functions to_string and to_wstring are part of the upcoming C++0x
>> standard. However, there are no functions for char16_t and char32_t
>> conversions.
>> 2) Some users can't use C++11 in some projects for quite some time,
>> but can use boost.
>> 3) "to_string(5)" is a lot shorter than
>> "lexical_cast<std::string>(5)". Some users would like to use a shorter
>> form.
>>
>> Is there interest in stoi, stoll, stof, to_string, to_wstring,
>> to_u16string, stod and other functions for char, wchar_t, char16_t and
>> char32_t conversions?
>> Shall I add them to lexical_cast library, or as a separate conversion
>> library?
> 
> Fast implementations of these things are already available from Spirit,
> do you plan on reusing them?

to_string is defined in terms of sprintf [1], which depends on the
locale (at least for the decimal point character [2], possibly for other
things), so I doubt that the Spirit implementations would be correct (at
least, not if used naively).  I think lexical_cast would also not be
correct, since it has a different locale-dependence from sprintf.

[1] N3290 [string.conversions] p7
[2] N1570 7.1.1 p2

John Bytheway