Re: [boost] [string] Realistic API proposal

Subject: Re: [boost] [string] Realistic API proposal
From: Joe Mucchiello (jmucchiello_at_[hidden])
Date: 2011-01-28 23:12:13

>> >           // UTF validation
>> > 
>> >          bool  is_valid_utf() const;
>> 
>> See, that's what makes the whole thing  pointless.
>
>Actually not, consider:
>
>   socket.read(my_string);
>   if(!my_string.is_valid_utf())
>      ....

This, and many of these functions, work much better as standalone functions:

// with a string-aware function
   socket.read(my_string);
   if (!is_valid_utf8(my_string.begin(),my_string.end())) ....

// with a C interface
   std::vector<char> vec;
   vec.resize(MY_BUFSIZE);
   int len = recv(socket, vec.data(), MY_BUFSIZE, 0);
   if (len >= 0) {
vec.resize(len);
      if (!is_valid_utf8(vec.begin(), vec.end())) ....
   }

// 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);
   ...

  Joe