node.cpp | Node | Runtime Evironment library

I'm creating a MEX to find a path between two nodes using the A* algorithm. The code works as expected, retrieves the right result and everything seems to be fine, but when I return from the method that calls the MEX, Matlab simply shuts itself down.

As I know sometimes Matlab creates a pointer to the same memory address when the user tries to create a copy of a variable (I.E. A = 3; B = A, then A and B are pointing to the same memory address, even though Matlab shows them as 2 independent variables) I used an old trick that consists on performing an operation directly to the copy of the variable, even if its a silly one, Matlab will think that the two variables are no longer the same and will create a copy of it (I.E. A = 3; B = A; B = B+0, now A and B are stored as different and independent variables).

So the only way that I have found to fix the issue is to do what is shown below in function getWP:

So I created a Binary tree class and I want to separate the class definition from its member function definition by putting the class def in the .h file and the function definitions in the .cpp file. Then I would include the .h file into the .cpp file. Now I got this to all work and it works fine. the problem is when I want to put the name including guards. Because I need to include the .h file in the member function .cpp file and in another .cpp that uses the binary tree class, I have to include these guards. But for some reason, once I include them both .cpp files don't seem to "see" the contents of the header file. I'm new to using to ifndef so I'm so sure what I'm doing wrong. thank you

Here's the header file called node.h:

I am trying to install the dependencies of a fresh project with Node.js v15.6.0. Because there is a bug with the version of webpack I am running the command npm i --legacy-peer-deps:

package.json

I'm experiencing a weird segmentation fault. When executing cv_bridge::toCvCopy in a ROS node, it fails with segmentation fault. I'm sure that the given message has data, and the code is enclosed with try...catch.

ROS version: kinetic, OpenCV version: 2.4, Ubuntu version: 16.04.

Code:

I'm trying to define Node into NodeList class, And store it.

Whay I've tried is:

In Try() function, I defined a node like Node *node = malloc... This works fine. But if I use the node that I defined in class like node = malloc... this line gives runtime error. I don't understand what is the difference between these two.

Here are classes:

Node.hpp

I have a class that is not default-constructable, copy-constructable or copy-assignable. It is move-constructable and move-assignable.

I have a 8 files FileSystem.cpp, Node.cpp, Directory.cpp and File.cpp and their header hpp files.

this is basic model of in memory file system. class FileSystem is responsible for creating root Directory which has its own nodes aka files or directories.

The class Node is parent class for both Directory and File. I need to include Node into both files to inherit from, but inside Node class implementation I need to access the File and Directory to do some operations. If I try to make foward decleration, I will got undefined refernces of class members. I read some articles about this, but I can't solve my problem with headers. What is the right approach for solving this kind of problem in c++. How/should I use header to solve this kind of problem?

Please note my background is different, so I think have missed something on c++ about headers and recursive declaration.

Here the source of these files.

FileSystem.cpp

I cannot determine the reason that gdb is either not finding the proper debugging symbols or they are not being generated by my makefile. I have added and removed various flags such as -g, -ggdb, and -O0 in as many combinations as I can think of. Any help would be appreciated!

Makefile:

I have a C++ constructor file (formatting_SQ.cpp) of a header file formatting_SQ.h which I want to link to other constructor files of header files (neat.cpp nnode.cpp link.cpp etc...-> neat.h nnode.h link.h) in order to have formatting_SQ.o.

Then, I want to link my main.cpp file with this formatting_SQ.o file. The problem is: formatting_SQ is embedded with python, and as far as my understanding goes, C++ embedded with Python needs the compiling flag -lpython3.6m on Linux: such flag requires a reference to a main() function, which I don't have in formatting_SQ.cpp because it's a constructor file meant to be an object file.

So I first tried to create object files for each constructor file and then link everything together at once: