...nodes are deallocated. But the tree does not go through and destroy all the nodes...

...have a big impact:

The RedBlackTree's nodes form a cycle, a false pointer into...

...the destructor? this should dereference all the nodes.

BTW, I think there is a previous...

...the compiler performs explicit dependency management at the level of nodes in the syntax tree.

...a generic Tree(T) that takes child nodes of various types like this:

struct / class...

...powerful. Getting its height, the number of  nodes. Show to them that the printing function...

...JSON tree, then clone off purpose-sized nodes from the work buffers when you encounter...

...is that CTFE operates on full AST
nodes.
To solve this, we either need a...

...graph is GC-allocated then NONE of its child nodes have any guarantees about destruction?

    if (nodes > buckets_length * 4) rehash();

Skiplist doesn't seem necessary. As seen above, there...