From bd40db10073196d7673e53bb78ec049b640df1ac Mon Sep 17 00:00:00 2001
From: thom <thom@localhost.localdomain>
Date: Tue, 29 May 2018 09:37:06 -0400
Subject: [PATCH] Handle arrow function return type declarations.

---
 extensions/flow_types.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/extensions/flow_types.yaml b/extensions/flow_types.yaml
index 22c7c87..7321c5f 100644
--- a/extensions/flow_types.yaml
+++ b/extensions/flow_types.yaml
@@ -3,6 +3,20 @@
 ---
 !merge
 variables: !merge
+  arrow_func_lookahead: |-
+    (?x)(?:
+      \s*(async\s*)?
+      (?:
+        {{identifier}}
+        |\( (?: [^()]|\([^()]*\) )* \)
+      )
+      (?:
+        \s*:
+        \s*{{identifier}}
+      )?
+      \s*=>
+    )
+
   class_element_name: |-
     (?x)\+?(?:
       {{property_name}}