[clangd] Introduced Logger interface.

Summary: This fixes a bunch of logging-related FIXMEs.

Reviewers: bkramer, krasimir, malaperle

Reviewed By: malaperle

Subscribers: malaperle, klimek, cfe-commits, mgorny

Differential Revision: https://reviews.llvm.org/D37972

llvm-svn: 313730

1 files changed, 19 insertions, 0 deletions

diff --git a/clang-tools-extra/clangd/Logger.cpp b/clang-tools-extra/clangd/Logger.cpp
new file mode 100644
index 00000000000..0448c6f5b6d
--- /dev/null
+++ b/clang-tools-extra/clangd/Logger.cpp
@@ -0,0 +1,19 @@
+//===--- 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"
+
+using namespace clang::clangd;
+
+EmptyLogger &EmptyLogger::getInstance() {
+  static EmptyLogger Logger;
+  return Logger;
+}
+
+void EmptyLogger::log(const llvm::Twine &Message) {}