Is there any official terminology about something like double quotes “” grammar?


In many programming language string is a token.

For example:

 token               ::= '"' string                        | nat   string              ::= string                        | '"'   nat                 ::= digit nat                        | ϵ 

This is a LL(1) grammar for some programming language’s toke grammar.

When parsing a string, there is no need to check follow set, because there is a " at the end of each string.

Comparing with nat, string is more easy to parse.

My question is

Is there any official terminology about this kind of grammar?

Thanks.