[clangd] Move the utility function to anonymous namespace, NFC.

llvm-svn: 349031

1 files changed, 33 insertions, 32 deletions

diff --git a/clang-tools-extra/clangd/index/Background.cpp b/clang-tools-extra/clangd/index/Background.cpp
index ca3e41a29e6..6c104cbe241 100644
--- a/clang-tools-extra/clangd/index/Background.cpp
+++ b/clang-tools-extra/clangd/index/Background.cpp
@@ -86,6 +86,39 @@ IncludeGraph getSubGraph(const URI &U, const IncludeGraph &FullGraph) {
 
   return IG;
 }
+
+// Creates a filter to not collect index results from files with unchanged
+// digests.
+// \p FileDigests contains file digests for the current indexed files, and all
+// changed files will be added to \p FilesToUpdate.
+decltype(SymbolCollector::Options::FileFilter)
+createFileFilter(const llvm::StringMap<FileDigest> &FileDigests,
+                 llvm::StringMap<FileDigest> &FilesToUpdate) {
+  return [&FileDigests, &FilesToUpdate](const SourceManager &SM, FileID FID) {
+    StringRef Path;
+    if (const auto *F = SM.getFileEntryForID(FID))
+      Path = F->getName();
+    if (Path.empty())
+      return false; // Skip invalid files.
+    SmallString<128> AbsPath(Path);
+    if (std::error_code EC =
+            SM.getFileManager().getVirtualFileSystem()->makeAbsolute(AbsPath)) {
+      elog("Warning: could not make absolute file: {0}", EC.message());
+      return false; // Skip files without absolute path.
+    }
+    sys::path::remove_dots(AbsPath, /*remove_dot_dot=*/true);
+    auto Digest = digestFile(SM, FID);
+    if (!Digest)
+      return false;
+    auto D = FileDigests.find(AbsPath);
+    if (D != FileDigests.end() && D->second == Digest)
+      return false; // Skip files that haven't changed.
+
+    FilesToUpdate[AbsPath] = *Digest;
+    return true;
+  };
+}
+
 } // namespace
 
 BackgroundIndex::BackgroundIndex(
@@ -281,38 +314,6 @@ void BackgroundIndex::update(StringRef MainFile, IndexFileIn Index,
   }
 }
 
-// Creates a filter to not collect index results from files with unchanged
-// digests.
-// \p FileDigests contains file digests for the current indexed files, and all
-// changed files will be added to \p FilesToUpdate.
-decltype(SymbolCollector::Options::FileFilter)
-createFileFilter(const llvm::StringMap<FileDigest> &FileDigests,
-                 llvm::StringMap<FileDigest> &FilesToUpdate) {
-  return [&FileDigests, &FilesToUpdate](const SourceManager &SM, FileID FID) {
-    StringRef Path;
-    if (const auto *F = SM.getFileEntryForID(FID))
-      Path = F->getName();
-    if (Path.empty())
-      return false; // Skip invalid files.
-    SmallString<128> AbsPath(Path);
-    if (std::error_code EC =
-            SM.getFileManager().getVirtualFileSystem()->makeAbsolute(AbsPath)) {
-      elog("Warning: could not make absolute file: {0}", EC.message());
-      return false; // Skip files without absolute path.
-    }
-    sys::path::remove_dots(AbsPath, /*remove_dot_dot=*/true);
-    auto Digest = digestFile(SM, FID);
-    if (!Digest)
-      return false;
-    auto D = FileDigests.find(AbsPath);
-    if (D != FileDigests.end() && D->second == Digest)
-      return false; // Skip files that haven't changed.
-
-    FilesToUpdate[AbsPath] = *Digest;
-    return true;
-  };
-}
-
 Error BackgroundIndex::index(tooling::CompileCommand Cmd,
                              BackgroundIndexStorage *IndexStorage) {
   trace::Span Tracer("BackgroundIndex");