A single header already has more than 2000 tokens.
There are countless lines in headers, and even any header can include another import of a header.

But a reminder: Please don't use "...", "etc." in necessary things.

You can do this:

• Count them manually, or
• Click the workspace button and click on "Outline". All symbols will appear in that tab, like variables, functions, enums or any other symbols.

Please note that the 2nd point is a part of Visual Studio Code