Simplify await and yield tracking in params (#9405)

2019-02-04 13:01:17 -08:00
parent fe71154626
commit 344d35bbe9
20 changed files with 90 additions and 82 deletions
--- a/packages/babel-parser/src/parser/util.js
+++ b/packages/babel-parser/src/parser/util.js
@@ -147,4 +147,22 @@ export default class UtilParser extends Tokenizer {
      );
    }
  }
+
+  checkYieldAwaitInDefaultParams() {
+    if (
+      this.state.yieldPos &&
+      (!this.state.awaitPos || this.state.yieldPos < this.state.awaitPos)
+    ) {
+      this.raise(
+        this.state.yieldPos,
+        "Yield cannot be used as name inside a generator function",
+      );
+    }
+    if (this.state.awaitPos) {
+      this.raise(
+        this.state.awaitPos,
+        "Await cannot be used as name inside an async function",
+      );
+    }
+  }
 }