Question

I am trying to cvopy boost::array<char> to std::string.

boost::array<char, 1024> _buffer;
std::string data;
std::copy(_buffer.begin(), _buffer.begin()+bytes_transferred, data.begin());

which is not working. So I changed it a little bit.

char _buffer[1024];
std::string data;
std::copy(_buffer, _buffer+bytes_transferred, data.begin());

second one is not working either.

Answer 1

You can use back_insert_iterator. Assigning to it will call push_back function of the underlying container so you don’t need to worry with allocating space manually.

std::copy(_buffer.begin(), _buffer.begin()+bytes_transferred, std::back_inserter(data));