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Peek at the incoming data on the stream. Returns the number of bytes read. Throws an exception on failure.
template< typename MutableBufferSequence> std::size_t peek( const MutableBufferSequence & buffers); » more...
Peek at the incoming data on the stream. Returns the number of bytes read, or 0 if an error occurred.
template< typename MutableBufferSequence> std::size_t peek( const MutableBufferSequence & buffers, boost::system::error_code & ec); » more...