Is it possible to create an email address parser in a recursive way (ll-grammar)?

Question

Email

I need an implementation example if possible, I just can't figure out how to implement it. Split the address into the following non-terminals <local part> | <domain part> |<part after the dot>
Further terminals "az", "0-9", "@", "." "-", "_".
I have no idea how to put it all together.

Answer 1

email ::= mailbox "@" hostname
mailbox ::= mailbox_symbol {mailbox}
mailbox_symbol ::= "a-z0-9..."
hostname ::= ...
In the most banal form, everything is OK, no left recursion, by hand you can write a parser in 10-15 minutes (recursive descent).
Another thing is that the email is not [email protected], there are all sorts of other complicated things.
I advise you to read https://habrahabr.ru/post/224623/