Copies bytes from a source buffer to a target buffer sequence.
template< typename MutableBufferSequence> std::size_t buffer_copy( const MutableBufferSequence & target, const const_buffer & source);
A modifiable buffer sequence representing the memory regions to which the bytes will be copied.
A non-modifiable buffer representing the memory region from which the bytes will be copied.
The number of bytes copied.
The number of bytes copied is the lesser of: