Fix build error

.gitignore

@@ -9,6 +9,7 @@
 *.suo
 *.user
 *.sln.docstates
+.vscode/
 
 # Build results
 

src/connection.cpp

@@ -116,7 +116,7 @@ void Connection::accept()
 {
 	std::lock_guard<std::recursive_mutex> lockClass(connectionLock);
 	try {
-		readTimer.expires_from_now(boost::posix_time::seconds(Connection::read_timeout));
+		readTimer.expires_from_now(boost::posix_time::seconds(CONNECTION_READ_TIMEOUT));
 		readTimer.async_wait(std::bind(&Connection::handleTimeout, std::weak_ptr<Connection>(shared_from_this()), std::placeholders::_1));
 
 		// Read size of the first packet
@@ -160,7 +160,7 @@ void Connection::parseHeader(const boost::system::error_code& error)
 	}
 
 	try {
-		readTimer.expires_from_now(boost::posix_time::seconds(Connection::read_timeout));
+		readTimer.expires_from_now(boost::posix_time::seconds(CONNECTION_READ_TIMEOUT));
 		readTimer.async_wait(std::bind(&Connection::handleTimeout, std::weak_ptr<Connection>(shared_from_this()),
 		                                    std::placeholders::_1));
 
@@ -222,7 +222,7 @@ void Connection::parsePacket(const boost::system::error_code& error)
 	}
 
 	try {
-		readTimer.expires_from_now(boost::posix_time::seconds(Connection::read_timeout));
+		readTimer.expires_from_now(boost::posix_time::seconds(CONNECTION_READ_TIMEOUT));
 		readTimer.async_wait(std::bind(&Connection::handleTimeout, std::weak_ptr<Connection>(shared_from_this()),
 		                                    std::placeholders::_1));
 
@@ -254,7 +254,7 @@ void Connection::internalSend(const OutputMessage_ptr& msg)
 {
 	protocol->onSendMessage(msg);
 	try {
-		writeTimer.expires_from_now(boost::posix_time::seconds(Connection::write_timeout));
+		writeTimer.expires_from_now(boost::posix_time::seconds(CONNECTION_WRITE_TIMEOUT));
 		writeTimer.async_wait(std::bind(&Connection::handleTimeout, std::weak_ptr<Connection>(shared_from_this()),
 		                                     std::placeholders::_1));
 

src/connection.h

@@ -24,6 +24,9 @@
 
 #include "networkmessage.h"
 
+static constexpr int32_t CONNECTION_WRITE_TIMEOUT = 30;
+static constexpr int32_t CONNECTION_READ_TIMEOUT = 30;
+
 class Protocol;
 using Protocol_ptr = std::shared_ptr<Protocol>;
 class OutputMessage;
@@ -63,9 +66,6 @@ class Connection : public std::enable_shared_from_this<Connection>
 		Connection(const Connection&) = delete;
 		Connection& operator=(const Connection&) = delete;
 
-		enum { write_timeout = 30 };
-		enum { read_timeout = 30 };
-
 		enum ConnectionState_t {
 			CONNECTION_STATE_OPEN,
 			CONNECTION_STATE_CLOSED,

src/item.h

@@ -233,7 +233,7 @@ class ItemAttributes
 			struct PushLuaVisitor : public boost::static_visitor<> {
 				lua_State* L;
 
-				PushLuaVisitor(lua_State* L) : boost::static_visitor<>(), L(L) {}
+				explicit PushLuaVisitor(lua_State* L) : boost::static_visitor<>(), L(L) {}
 
 				void operator()(const boost::blank&) const {
 					lua_pushnil(L);
@@ -263,7 +263,7 @@ class ItemAttributes
 			struct SerializeVisitor : public boost::static_visitor<> {
 				PropWriteStream& propWriteStream;
 
-				SerializeVisitor(PropWriteStream& propWriteStream) : boost::static_visitor<>(), propWriteStream(propWriteStream) {}
+				explicit SerializeVisitor(PropWriteStream& propWriteStream) : boost::static_visitor<>(), propWriteStream(propWriteStream) {}
 
 				void operator()(const boost::blank&) const {
 				}

src/signals.h

@@ -26,7 +26,7 @@ class Signals
 {
 	boost::asio::signal_set set;
 	public:
-		Signals(boost::asio::io_service& service);
+		explicit Signals(boost::asio::io_service& service);
 
 	private:
 		void asyncWait();