Typescript - Tuples can include rest elements (#8805)

2018-10-08 12:32:31 -04:00
parent 4b8cb75b74
commit 08454ece46
9 changed files with 210 additions and 1 deletions
--- a/packages/babel-parser/src/plugins/typescript.js
+++ b/packages/babel-parser/src/plugins/typescript.js
@@ -511,7 +511,16 @@ export default (superClass: Class<Parser>): Class<Parser> =>
    }

    tsParseTupleElementType(): N.TsType {
+      // parses `...TsType[]`
+      if (this.match(tt.ellipsis)) {
+        const restNode: N.TsRestType = this.startNode();
+        this.next(); // skips ellipsis
+        restNode.typeAnnotation = this.tsParseType();
+        return this.finishNode(restNode, "TSRestType");
+      }
+
      const type = this.tsParseType();
+      // parses `TsType?`
      if (this.eat(tt.question)) {
        const optionalTypeNode: N.TsOptionalType = this.startNodeAtNode(type);
        optionalTypeNode.typeAnnotation = type;