From 288da8c61864d422522998eec9497f0863b13455 Mon Sep 17 00:00:00 2001
From: Aaron Ballman <aaron@aaronballman.com>
Date: Mon, 3 Mar 2014 21:15:07 +0000
Subject: [PATCH] Adding support for MSVC debugger visualization of the
 Optional datatype.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202760 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/llvm.natvis | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/utils/llvm.natvis b/utils/llvm.natvis
index 373bf963e19..9874ce58d25 100644
--- a/utils/llvm.natvis
+++ b/utils/llvm.natvis
@@ -166,4 +166,12 @@ or create a symbolic link so it updates automatically.
   <Type Name="llvm::Triple">
     <DisplayString>{Data}</DisplayString>
   </Type>
+  
+  <Type Name="llvm::Optional&lt;*&gt;">
+    <DisplayString Condition="!hasVal">empty</DisplayString>
+    <DisplayString Condition="hasVal">{*(($T1 *)(unsigned char *)storage.buffer)}</DisplayString>
+    <Expand>
+      <Item Name="[underlying]" Condition="hasVal">*(($T1 *)(unsigned char *)storage.buffer)</Item>
+    </Expand>
+  </Type>
 </AutoVisualizer>