From 6b47447e7a4e367fcbd88e89cf3624beba81d145 Mon Sep 17 00:00:00 2001
From: Amjad Masad <amjad.masad@gmail.com>
Date: Wed, 20 Jan 2016 19:02:04 -0800
Subject: [PATCH] UnaryExpressions are never not prefix

If you look at the spec https://github.com/babel/babel/blob/master/doc/ast/spec.md#unaryexpression
All unary expressions are prefix. We should deprecate this field. But for now let's just default it true.
---
 packages/babel-types/src/definitions/core.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/babel-types/src/definitions/core.js b/packages/babel-types/src/definitions/core.js
index 7a869a82f4..aab8ca2d2d 100644
--- a/packages/babel-types/src/definitions/core.js
+++ b/packages/babel-types/src/definitions/core.js
@@ -626,7 +626,7 @@ defineType("UnaryExpression", {
   builder: ["operator", "argument", "prefix"],
   fields: {
     prefix: {
-      default: false
+      default: true
     },
     argument: {
       validate: assertNodeType("Expression")