Using closure in function scope to make "real" private class members

[zjh]

On Tuesday, 7 June 2022 at 09:17:17 UTC, Ola Fosheim Grøstad 
wrote:
>
> Pick up a book on language design, it is fun to read about, and 
> you seem interested! Then we can talk more. (Without basic 
> knowledge about language design principles it is easy to reach 
> conclusion that has proven to be not so good).

What I care about is that the code will not `inadvertently` 
destroy `my class code` .
This is the meaning of `encapsulation` .
I don't care about other `designs`.