Allow tuple rest trailing comma (#10800)

2019-12-04 02:32:36 +09:00
parent e74efd2c0a
commit d18afbd7c3
3 changed files with 185 additions and 1 deletions
--- a/packages/babel-parser/src/plugins/typescript/index.js
+++ b/packages/babel-parser/src/plugins/typescript/index.js
@@ -618,7 +618,12 @@ export default (superClass: Class<Parser>): Class<Parser> =>
        const restNode: N.TsRestType = this.startNode();
        this.next(); // skips ellipsis
        restNode.typeAnnotation = this.tsParseType();
-        this.checkCommaAfterRest(charCodes.rightSquareBracket);
+        if (
+          this.match(tt.comma) &&
+          this.lookaheadCharCode() !== charCodes.rightSquareBracket
+        ) {
+          this.raiseRestNotLast(this.state.start);
+        }
        return this.finishNode(restNode, "TSRestType");
      }