[lldb] Add #include <optional> (NFC)

This patch adds #include <optional> to those files containing
llvm::Optional<...> or Optional<...>.

I'll post a separate patch to actually replace llvm::Optional with
std::optional.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

8 files changed, 8 insertions, 0 deletions

diff --git a/lldb/tools/lldb-server/Acceptor.cpp b/lldb/tools/lldb-server/Acceptor.cpp
index 4714252011aa..0b69350c1acc 100644
--- a/lldb/tools/lldb-server/Acceptor.cpp
+++ b/lldb/tools/lldb-server/Acceptor.cpp
@@ -15,6 +15,7 @@
 #include "lldb/Host/common/TCPSocket.h"
 #include "lldb/Utility/StreamString.h"
 #include "lldb/Utility/UriParser.h"
+#include <optional>
 
 using namespace lldb;
 using namespace lldb_private;
diff --git a/lldb/tools/lldb-server/lldb-platform.cpp b/lldb/tools/lldb-server/lldb-platform.cpp
index 0211de77bb75..fb37aa6f6175 100644
--- a/lldb/tools/lldb-server/lldb-platform.cpp
+++ b/lldb/tools/lldb-server/lldb-platform.cpp
@@ -19,6 +19,7 @@
 #include <sys/wait.h>
 #endif
 #include <fstream>
+#include <optional>
 
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/FileUtilities.h"
diff --git a/lldb/tools/lldb-test/lldb-test.cpp b/lldb/tools/lldb-test/lldb-test.cpp
index cb04ca5d50e2..6bd8585bdabe 100644
--- a/lldb/tools/lldb-test/lldb-test.cpp
+++ b/lldb/tools/lldb-test/lldb-test.cpp
@@ -46,6 +46,7 @@
 #include "llvm/Support/WithColor.h"
 
 #include <cstdio>
+#include <optional>
 #include <thread>
 
 using namespace lldb;
diff --git a/lldb/tools/lldb-vscode/FifoFiles.cpp b/lldb/tools/lldb-vscode/FifoFiles.cpp
index 6cde4a493076..18354bfabcea 100644
--- a/lldb/tools/lldb-vscode/FifoFiles.cpp
+++ b/lldb/tools/lldb-vscode/FifoFiles.cpp
@@ -17,6 +17,7 @@
 #include <chrono>
 #include <fstream>
 #include <future>
+#include <optional>
 #include <thread>
 
 #include "llvm/Support/FileSystem.h"
diff --git a/lldb/tools/lldb-vscode/JSONUtils.cpp b/lldb/tools/lldb-vscode/JSONUtils.cpp
index 5593d7be3b66..06d5c28c2a1b 100644
--- a/lldb/tools/lldb-vscode/JSONUtils.cpp
+++ b/lldb/tools/lldb-vscode/JSONUtils.cpp
@@ -8,6 +8,7 @@
 
 #include <algorithm>
 #include <iomanip>
+#include <optional>
 #include <sstream>
 #include <string.h>
 
diff --git a/lldb/tools/lldb-vscode/JSONUtils.h b/lldb/tools/lldb-vscode/JSONUtils.h
index 011c107b9ab1..64c1a4c3d554 100644
--- a/lldb/tools/lldb-vscode/JSONUtils.h
+++ b/lldb/tools/lldb-vscode/JSONUtils.h
@@ -14,6 +14,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/JSON.h"
 #include <cstdint>
+#include <optional>
 
 namespace lldb_vscode {
 
diff --git a/lldb/tools/lldb-vscode/ProgressEvent.cpp b/lldb/tools/lldb-vscode/ProgressEvent.cpp
index 69a8a2eabb95..57658768eac1 100644
--- a/lldb/tools/lldb-vscode/ProgressEvent.cpp
+++ b/lldb/tools/lldb-vscode/ProgressEvent.cpp
@@ -9,6 +9,7 @@
 #include "ProgressEvent.h"
 
 #include "JSONUtils.h"
+#include <optional>
 
 using namespace lldb_vscode;
 using namespace llvm;
diff --git a/lldb/tools/lldb-vscode/ProgressEvent.h b/lldb/tools/lldb-vscode/ProgressEvent.h
index 7fa79ffca0fc..376c4a320768 100644
--- a/lldb/tools/lldb-vscode/ProgressEvent.h
+++ b/lldb/tools/lldb-vscode/ProgressEvent.h
@@ -8,6 +8,7 @@
 
 #include <atomic>
 #include <mutex>
+#include <optional>
 #include <queue>
 #include <thread>