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Write some data.
template< class ConstBufferSequence> std::size_t write_some( ConstBufferSequence const& buffers);
This function is used to write some data to the stream. The call blocks until one of the following is true:
| Name | Description | 
|---|---|
| 
                       | The buffers from which the data will be written. If the size of the buffers is zero bytes, the call always returns immediately with no error. | 
The number of bytes written.
| Type | Thrown On | 
|---|---|
| 
                       | Thrown on failure. | 
            The write_some operation
            may not transmit all of the requested number of bytes. Consider using
            the function net::write if you need to ensure that the
            requested amount of data is written before the blocking operation completes.