better way to disambiguate optional chaining operator

rusty-ecma · Apr 9, 2024 · 1f65b9b · 1f65b9b
1 parent 31faa06
commit 1f65b9b
Showing 1 changed file with 5 additions and 16 deletions.
diff --git a/src/tokenizer/mod.rs b/src/tokenizer/mod.rs
@@ -723,23 +723,12 @@ impl<'a> Tokenizer<'a> {
             self.gen_punct(Punct::DoubleQuestionMark)
         } else if self.look_ahead_byte_matches('.') {
             self.stream.skip_bytes(1);
-            if let Some(next) = self.stream.peek_char() {
-                if Self::is_id_start(next) {
-                    // a?.b
-                    self.gen_punct(Punct::QuestionMarkDot)
-                } else if self.look_ahead_byte_matches('(') {
-                    // a?.()
-                    self.gen_punct(Punct::QuestionMarkDot)
-                } else if self.look_ahead_byte_matches('[') {
-                    // a?.['b']
-                    self.gen_punct(Punct::QuestionMarkDot)
-                } else {
-                    // ternary operator
-                    self.stream.skip_back(1);
-                    self.gen_punct(Punct::QuestionMark)
-                }
-            } else {
+            if self.stream.at_decimal() {
+                // floating point numbers can be defined with a leading period: ".123"
+                self.stream.skip_back(1);
                 self.gen_punct(Punct::QuestionMark)
+            } else {
+                self.gen_punct(Punct::QuestionMarkDot)
             }
         } else {
             self.gen_punct(Punct::QuestionMark)