Create a new non-modifiable buffer that represents the given POD array.
template< typename PodType, std::size_t N> const_buffer buffer( std::array< const PodType, N > & data, std::size_t max_size_in_bytes);
A const_buffer
value equivalent to:
const_buffer( data.data(), min(data.size() * sizeof(PodType), max_size_in_bytes));