yaml-cpp | A YAML parser and emitter in C++ | YAML Processing library

It turns out I was simply using the wrong target. Interfaces don't include any source files and thus won't generate any meaningful compile_commands.json.

What I was looking for is the object target which solves my issue completely.

Just for the reference, this is how the "correct" CMakeLists.txt would look like:

The most obvious way to identify nodes would be to use their m_pNode pointer; however that is not publicly queryable. The next best way is to use bool Node::is(const Node& rhs) const, which sadly doesn't allow us to do any sorting to speed up performance when searching for cycles.

As you probably do not only want to avoid cycles, but also want to avoid descending into the same subgraph twice, you actually need to remember all visited nodes. This means that eventually you'll store all nodes in the subgraph you walk and have space complexity O(n), and since there is no order on nodes we can use, time complexity is O(n²) since each node must be compared to all previously seen nodes. That is horrible.

Anyway, here's the code that does it:

You're getting this error because Melodic is the ros distro for Ubuntu 18.04. As of present the most recent release is Noetic which targets 20.04. The version of Ubuntu you're using does not currently have a supported ROS release, as such your only real option is to downgrade if you want ROS.

In your buildscript you're executing:

The code in the question does not match the sample.yaml file you've provided but here's an example of how you could extract the floating points you have in the Rectangle in sample.yaml.

When you have a file yaml.h that itself includes other files like this:

Generally, the compiler is the better judge of whether some code is valid or not. Your code is perfectly fine.

The error message also gives us a hint at what seems to be the problem: It talks about a range type which simply is not a thing in this context (C++20 ranges library does exist but is irrelevant here). The range-for you are using simply requires the range-expression to be either an array, have begin and end functions defined, or be a braced-init-list.

So what we are seeing is likely the result of CLion not correctly checking this restraint, possibly by re-using code from JetBrains' other IDEs that is not appropriate for C++. The issue you created is therefore appropriate way of making this error go away.

You're explicitly demanding linkage against a shared object (.so)!

if your file header location is same with your main program just

#include "yourheader.h"