Can someone help explain what's going on here: \"([^\\\"]|\\.)\" [seen here in context](https://github.com/matz/streem/blob/master/src/lex.l#L49).

Now it seems to be finding literal strings (so "strings" e.t.c.). That would explain the literal double quotes on either side. so without that we get: ([^\\\"]|\\.) so zero or more repeating versions of [^\\\"]|\\.

What I don't understand is why there is the explicit or \\. construct there, as this seems unnecessary. Am I missing something? also, why does it seem that strings cannot have either literal \ or literal " in them?