[Interest] Why QString and not std::string?

[Konstantin Tokarev]

15.06.2012, 16:12, "Constantin Makshin" <cmakshin at gmail.com>:
> On 06/15/2012 02:55 PM, Konstantin Tokarev wrote:
>
>>  15.06.2012, 14:50, "Rui Maciel" <rui.maciel at gmail.com>:
>>>  Does anyone know what's the rationale for relying on Qt's custom QString
>>>  instead of simply using C++'s standard and omnipresent std::string?
>>  1. Historical reasons - STL was not implemented on the same level in all compilers
>>  in the past.
>>  2. std::string does not hadle UTF16 strings, and std::wstring is non-standard
>
> 3. std::string's behavior (e.g. use of the copy-on-write technique) is
> implementation-dependent while QString is the same everywhere.
> 4. QString has more features (formatting, regular expressions, cheap
> substring extraction through QStringRef, etc.).

Note that (4) on its own doesn't require new implementation of string

-- 
Regards,
Konstantin