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I don't want to create a new question just for this question: Is the method open create the bag file?

because when I do

rosbag::Bag bag;

    bag.open("test.bag", rosbag::bagmode::Write);

    std_msgs::String str;
    str.data = std::string("foo");

    std_msgs::Int32 i;
    i.data = 42;

    bag.write("chatter", ros::Time::now(), str);
    bag.write("numbers", ros::Time::now(), i);

    bag.close();

I don't have any test.bag file in my rosbag folder (I've just created)...

Thanks for your help

I don't want to create a new question just for this question: Is the method open create the bag file?

because when I dodo (just before my while loop)

rosbag::Bag bag;

    bag.open("test.bag", rosbag::bagmode::Write);

    std_msgs::String str;
    str.data = std::string("foo");

    std_msgs::Int32 i;
    i.data = 42;

    bag.write("chatter", ros::Time::now(), str);
    bag.write("numbers", ros::Time::now(), i);

    bag.close();

I don't have any test.bag file in my rosbag folder (I've just created)...

Thanks for your help