Re: [boost] [string] Realistic API proposal

Subject: Re: [boost] [string] Realistic API proposal
From: Anders Dalvander (boost_at_[hidden])
Date: 2011-01-29 05:15:43

On 2011-01-28 23:04, Artyom<artyomtnk_at_[hidden]> wrote:
>> >  // conversion for Windows API
>> >      std::vector<wchar_t>   vec;
>> >      vec.resize(count_codepoints<utf8>(mystring.begin(),  mystring.end()));
>> >      convert<utf8,utf16>(mystring.begin(),  mystring.end(), vec.begin());
>> >      HRESULT hr = WriteFile(handle,  vec.data(), vec.size(),&dwBytesWritten,
>> >  NULL);
>> >      ...
>> >
> Notice vector is not string and it requires additional copy

If std::string is UTF-8 encoded (as you are suggesting, correct?), then 
you also requires additional copy:

    // conversion for Windows API
    std::string u8s = ...;
    std::wstring u16s = convert_to_utf16(u8s);
    HANDLE h = CreateFileW(u16s.c_str(), ...);

Regards,
Anders Dalvander

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