[luatex] about calling of \everypar command after end of the list.

[Alexander Kozlovskiy]

hello everybody. Several month ago i have a problem with \everypar 
command,which not calls after end of the list. You can see this question 
at 
https://tex.stackexchange.com/questions/533073/not-calls-everypar-command-after-enumerate-environment/533077#533077. 
Now it seems,what it works ok,but i need in explanation of this 
code,because i not understood some moments. Below you will see this 
code. You can see almost this code if you go to link,which was above. As 
i wrote,i have several question to this code.

1. Why latex after end of the list ignore \everypar command? Where i can 
find the sources of \list and \endlist command,to see this moment?

2. As i understood,\newtoks command create a new token. If it's true,why 
we should create \everypar token again,because \everypar token list now 
exists,but without it my code not works.

3. What means \the command. without \the i get an error,so i want to 
clarify for future,what do command \the.

4. Why after end of list latex not use \everypar command,but use 
\myeverypar command. Why this happens?

5. As i understood,\newtoks command haven't any analog in expl3?

Thank you very much for your explanation,because i want to 
understood,how it works.


\documentclass{article}
\let\oldeverypar\everypar
\newtoks\everypar
\newtoks\myeverypar
\oldeverypar{\the\everypar\the\myeverypar}
\newcommand{\logging}{[here]\message{new paragraph}}
\begin{document}
\section{test}
\begin{enumerate}
\item test
\item new test
\end{enumerate}
\myeverypar{\logging}

Test

New test

test again
\begin{enumerate}
\item test
\end{enumerate}

new test again
\end{document}