_Symbols _with _leading _underscores

[user1234]

On Saturday, 17 December 2022 at 02:42:22 UTC, Paul wrote:
> I see code like this from time to time.  Are the leading 
> underscores significant, in general, in the D language?  Is it 
> just programmer preference? Is it a coding practice, in 
> general, that is common...even outside of D?  Thanks for any 
> assistance.

The only important thing you should know about is that doubly 
leading underscores are reserved for symbols generated by the D 
front-end, so you should avoid them. This is specified here: 
https://dlang.org/spec/lex.html#identifiers.