silence warnings

.gitignore

@@ -7,3 +7,4 @@ localhost.session.sql
 CMakeFiles
 cmake-build-debug-coverage
 .idea
+.cache

parser.cpp

@@ -12,7 +12,7 @@ namespace usql {
 		if (type == ColumnType::date_type)	return "date_type";
 		if (type == ColumnType::bool_type)	return "bool_type";
 
-		throw Exception("invalid column type: " + (int)type);	
+		throw Exception("invalid column type: " + std::to_string((int)type));	
 	};
 
 

parser.h

@@ -162,7 +162,7 @@ struct FunctionNode : Node {
 		if (type == Type::max)			return "max";
 		if (type == Type::count)		return "count";
 
-		throw Exception("invalid function: " + (int)type);	
+		throw Exception("invalid function: " + std::to_string((int)type));	
 	};