From e81b76253dbd98d7b7f19325975abaf0b681f401 Mon Sep 17 00:00:00 2001
From: Ilya Biryukov <ibiryukov@google.com>
Date: Thu, 5 Oct 2017 22:15:15 +0000
Subject: [PATCH] [clangd] Attempt to fix compilation with MSVC.

llvm-svn: 315028
---
 clang-tools-extra/clangd/ClangdServer.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/clang-tools-extra/clangd/ClangdServer.h b/clang-tools-extra/clangd/ClangdServer.h
index ae510c97c9f3..7bdc0c28c3c6 100644
--- a/clang-tools-extra/clangd/ClangdServer.h
+++ b/clang-tools-extra/clangd/ClangdServer.h
@@ -50,6 +50,9 @@ typedef std::string VFSTag;
 /// FileSystemProvider when this value was computed.
 template <class T> class Tagged {
 public:
+  // MSVC requires future<> arguments to be default-constructible.
+  Tagged() = default;
+
   template <class U>
   Tagged(U &&Value, VFSTag Tag)
       : Value(std::forward<U>(Value)), Tag(std::move(Tag)) {}
@@ -61,8 +64,8 @@ public:
   Tagged(Tagged<U> &&Other)
       : Value(std::move(Other.Value)), Tag(std::move(Other.Tag)) {}
 
-  T Value;
-  VFSTag Tag;
+  T Value = T();
+  VFSTag Tag = VFSTag();
 };
 
 template <class T>