Add optional to MemberExpression

2017-06-04 00:20:21 -04:00 · 2017-06-04 00:20:21 -04:00 · b048bff77d
commit b048bff77d
parent 9ce797dd34
1 changed files with 5 additions and 1 deletions
--- a/packages/babel-types/src/definitions/core.js
+++ b/packages/babel-types/src/definitions/core.js
@ -416,7 +416,7 @@ defineType("LogicalExpression", {
 });

 defineType("MemberExpression", {
-  builder: ["object", "property", "computed"],
+  builder: ["object", "property", "computed", "optional"],
  visitor: ["object", "property"],
  aliases: ["Expression", "LVal"],
  fields: {
@ -437,6 +437,10 @@ defineType("MemberExpression", {
    computed: {
      default: false,
    },
+    optional: {
+      validate: assertOneOf(true, false),
+      optional: true,
+    }
  },
 });