Fix: Coding Rules Example ambiguous reference

- error: reference to ‘placeholders’ is ambiguous

applications/examples/openvibe-to-tcpip/src/tcpip-client.cpp

@@ -73,7 +73,7 @@ public:
 			m_stimulusSocket.connect(*resolver.resolve(query), error);
 
 			// Tell ASIO to read a stimulus
-			async_read_until(m_stimulusSocket, m_stimulusStream, "\n", boost::bind(&TCPWriterClient::stimulusHandler, this, placeholders::error));
+			async_read_until(m_stimulusSocket, m_stimulusStream, "\n", boost::bind(&TCPWriterClient::stimulusHandler, this, boost::asio::placeholders::error));
 		}
 
 		if ((sSignalPort != nullptr) && strcmp(sSignalPort, "0") != 0)
@@ -88,7 +88,7 @@ public:
 
 			// Tell ASIO to read the signal header
 			async_read(m_signalSocket, buffer(m_signalHeaderBuffer.data(), m_headerSize), transfer_at_least(m_headerSize),
-					   boost::bind(&TCPWriterClient::signalHeaderHandler, this, placeholders::error));
+					   boost::bind(&TCPWriterClient::signalHeaderHandler, this, boost::asio::placeholders::error));
 		}
 	}
 
@@ -103,7 +103,7 @@ public:
 
 		// Tell ASIO to read again
 		async_read_until(m_stimulusSocket, m_stimulusStream, "\n",
-						 boost::bind(&TCPWriterClient::stimulusHandler, this, placeholders::error));
+						 boost::bind(&TCPWriterClient::stimulusHandler, this, boost::asio::placeholders::error));
 	}
 
 	void signalHeaderHandler(const system::error_code& error)
@@ -142,7 +142,7 @@ public:
 
 		// Tell ASIO to read the actual signal
 		async_read(m_signalSocket, buffer(m_signalBuffer.data(), m_bufferSize), transfer_at_least(m_bufferSize),
-				   boost::bind(&TCPWriterClient::signalHandler, this, placeholders::error));
+				   boost::bind(&TCPWriterClient::signalHandler, this, boost::asio::placeholders::error));
 	}
 
 	void signalHandler(const system::error_code& error)
@@ -167,7 +167,7 @@ public:
 
 		// Tell ASIO to read more
 		async_read(m_signalSocket, buffer(m_signalBuffer.data(), m_bufferSize), transfer_at_least(m_bufferSize),
-				   boost::bind(&TCPWriterClient::signalHandler, this, placeholders::error));
+				   boost::bind(&TCPWriterClient::signalHandler, this, boost::asio::placeholders::error));
 	}
 };