Add new reserved symbols.

CHANGELOG.md

@@ -16,6 +16,11 @@ Bug fixes
 * _Strict Variables Mode_ now checks for module namespaces within functions as well.
 * Module defined via `Engine::register_static_module` are now checked in _Strict Variables Mode_.
 
+Reserved Symbols
+----------------
+
+* `?`, `?.` and `!.` are now reserved symbols.
+
 Deprecated API's
 ----------------
 

src/tokenizer.rs

@@ -1992,6 +1992,7 @@ fn get_next_token_inner(
 
                 return Some((Token::NotEqualsTo, start_pos));
             }
+            ('!', '.') => return Some((Token::Reserved("!.".into()), start_pos)),
             ('!', ..) => return Some((Token::Bang, start_pos)),
 
             ('|', '|') => {
@@ -2032,6 +2033,9 @@ fn get_next_token_inner(
 
             ('$', ..) => return Some((Token::Reserved("$".into()), start_pos)),
 
+            ('?', '.') => return Some((Token::Reserved("?.".into()), start_pos)),
+            ('?', ..) => return Some((Token::Reserved("?".into()), start_pos)),
+
             (ch, ..) if ch.is_whitespace() => (),
 
             (ch, ..) => {