Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/clangd/Logger.cpp

@@ -0,0 +1,33 @@
+//===--- Logger.cpp - Logger interface for clangd -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Logger.h"
+
+namespace clang {
+namespace clangd {
+
+namespace {
+Logger *L = nullptr;
+} // namespace
+
+LoggingSession::LoggingSession(clangd::Logger &Instance) {
+  assert(!L);
+  L = &Instance;
+}
+
+LoggingSession::~LoggingSession() { L = nullptr; }
+
+void log(const Context &Ctx, const llvm::Twine &Message) {
+  if (!L)
+    return;
+  L->log(Ctx, Message);
+}
+
+} // namespace clangd
+} // namespace clang