Method into_class_literal

regex/regex-syntax/src/ast/parse.rs:90–100

Convert this primitive into a literal in a character class. In particular, literals are the only valid items that can appear in ranges. If this primitive is not a legal item (i.e., a class, assertion or a dot), then return an error.

(
        self,
        p: &ParserI<P>,
    )

    /// If this primitive is not a legal item (i.e., a class, assertion or a
    /// dot), then return an error.
    fn into_class_literal<P: Borrow<Parser>>(
        self,
        p: &ParserI<P>,
    ) -> Result<ast::Literal> {
        use self::Primitive::*;

        match self {
            Literal(lit) => Ok(lit),
            x => Err(p.error(*x.span(), ast::ErrorKind::ClassRangeLiteral)),
        }
    }
}

/// Returns true if the given character is a hexadecimal digit.