Author: Owen Pan
Date: 2024-05-20T20:32:18-07:00
New Revision: 1c58208d899285318c89e069268145c85ec33368

URL: 
https://github.com/llvm/llvm-project/commit/1c58208d899285318c89e069268145c85ec33368
DIFF: 
https://github.com/llvm/llvm-project/commit/1c58208d899285318c89e069268145c85ec33368.diff

LOG: [clang-format][NFC] Remove redundnat llvm::, clang::, etc.

Added: 
    

Modified: 
    clang/include/clang/Format/Format.h
    clang/lib/Format/Format.cpp
    clang/lib/Format/FormatTokenSource.h
    clang/lib/Format/MacroExpander.cpp
    clang/lib/Format/Macros.h
    clang/lib/Format/SortJavaScriptImports.cpp
    clang/tools/clang-format/ClangFormat.cpp
    clang/unittests/Format/CleanupTest.cpp
    clang/unittests/Format/DefinitionBlockSeparatorTest.cpp
    clang/unittests/Format/FormatTestBase.h
    clang/unittests/Format/FormatTestCSharp.cpp
    clang/unittests/Format/FormatTestJS.cpp
    clang/unittests/Format/FormatTestJson.cpp
    clang/unittests/Format/FormatTestProto.cpp
    clang/unittests/Format/FormatTestRawStrings.cpp
    clang/unittests/Format/FormatTestSelective.cpp
    clang/unittests/Format/FormatTestTableGen.cpp
    clang/unittests/Format/FormatTestUtils.h
    clang/unittests/Format/FormatTestVerilog.cpp
    clang/unittests/Format/FormatTokenSourceTest.cpp
    clang/unittests/Format/MacroCallReconstructorTest.cpp
    clang/unittests/Format/MacroExpanderTest.cpp
    clang/unittests/Format/MatchFilePathTest.cpp
    clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
    clang/unittests/Format/ObjCPropertyAttributeOrderFixerTest.cpp
    clang/unittests/Format/QualifierFixerTest.cpp
    clang/unittests/Format/SortImportsTestJS.cpp
    clang/unittests/Format/SortImportsTestJava.cpp
    clang/unittests/Format/SortIncludesTest.cpp
    clang/unittests/Format/TestLexer.h
    clang/unittests/Format/TokenAnnotatorTest.cpp
    clang/unittests/Format/UsingDeclarationsSorterTest.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Format/Format.h 
b/clang/include/clang/Format/Format.h
index 74893f23210cd..274b45d1bc586 100644
--- a/clang/include/clang/Format/Format.h
+++ b/clang/include/clang/Format/Format.h
@@ -5239,7 +5239,7 @@ tooling::Replacements sortIncludes(const FormatStyle 
&Style, StringRef Code,
 /// Returns the replacements corresponding to applying and formatting
 /// \p Replaces on success; otheriwse, return an llvm::Error carrying
 /// llvm::StringError.
-llvm::Expected<tooling::Replacements>
+Expected<tooling::Replacements>
 formatReplacements(StringRef Code, const tooling::Replacements &Replaces,
                    const FormatStyle &Style);
 
@@ -5256,7 +5256,7 @@ formatReplacements(StringRef Code, const 
tooling::Replacements &Replaces,
 /// The include manipulation is done via ``tooling::HeaderInclude``, see its
 /// documentation for more details on how include insertion points are found 
and
 /// what edits are produced.
-llvm::Expected<tooling::Replacements>
+Expected<tooling::Replacements>
 cleanupAroundReplacements(StringRef Code, const tooling::Replacements 
&Replaces,
                           const FormatStyle &Style);
 
@@ -5381,11 +5381,10 @@ extern const char *DefaultFallbackStyle;
 /// \returns FormatStyle as specified by ``StyleName``. If ``StyleName`` is
 /// "file" and no file is found, returns ``FallbackStyle``. If no style could 
be
 /// determined, returns an Error.
-llvm::Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
-                                     StringRef FallbackStyle,
-                                     StringRef Code = "",
-                                     llvm::vfs::FileSystem *FS = nullptr,
-                                     bool AllowUnknownOptions = false);
+Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
+                               StringRef FallbackStyle, StringRef Code = "",
+                               llvm::vfs::FileSystem *FS = nullptr,
+                               bool AllowUnknownOptions = false);
 
 // Guesses the language from the ``FileName`` and ``Code`` to be formatted.
 // Defaults to FormatStyle::LK_Cpp.

diff  --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 52005a6c881f3..9cba0c2614eef 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -28,7 +28,7 @@
 
 using clang::format::FormatStyle;
 
-LLVM_YAML_IS_SEQUENCE_VECTOR(clang::format::FormatStyle::RawStringFormat)
+LLVM_YAML_IS_SEQUENCE_VECTOR(FormatStyle::RawStringFormat)
 
 namespace llvm {
 namespace yaml {
@@ -1235,7 +1235,7 @@ std::error_code make_error_code(ParseError e) {
   return std::error_code(static_cast<int>(e), getParseCategory());
 }
 
-inline llvm::Error make_string_error(const llvm::Twine &Message) {
+inline llvm::Error make_string_error(const Twine &Message) {
   return llvm::make_error<llvm::StringError>(Message,
                                              llvm::inconvertibleErrorCode());
 }
@@ -2361,7 +2361,7 @@ class JavaScriptRequoter : public TokenAnalyzer {
           // FIXME: handle error. For now, print error message and skip the
           // replacement for release version.
           if (Err) {
-            llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+            llvm::errs() << toString(std::move(Err)) << "\n";
             assert(false);
           }
         };
@@ -2802,7 +2802,7 @@ class Cleaner : public TokenAnalyzer {
       // FIXME: better error handling. for now just print error message and 
skip
       // for the release version.
       if (Err) {
-        llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+        llvm::errs() << toString(std::move(Err)) << "\n";
         assert(false && "Fixes must not conflict!");
       }
       Idx = End + 1;
@@ -3074,7 +3074,7 @@ static void sortCppIncludes(const FormatStyle &Style,
       llvm::to_vector<16>(llvm::seq<unsigned>(0, Includes.size()));
 
   if (Style.SortIncludes == FormatStyle::SI_CaseInsensitive) {
-    llvm::stable_sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
+    stable_sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
       const auto LHSFilenameLower = Includes[LHSI].Filename.lower();
       const auto RHSFilenameLower = Includes[RHSI].Filename.lower();
       return std::tie(Includes[LHSI].Priority, LHSFilenameLower,
@@ -3083,7 +3083,7 @@ static void sortCppIncludes(const FormatStyle &Style,
                       Includes[RHSI].Filename);
     });
   } else {
-    llvm::stable_sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
+    stable_sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
       return std::tie(Includes[LHSI].Priority, Includes[LHSI].Filename) <
              std::tie(Includes[RHSI].Priority, Includes[RHSI].Filename);
     });
@@ -3115,7 +3115,7 @@ static void sortCppIncludes(const FormatStyle &Style,
   // enough as additional newlines might be added or removed across #include
   // blocks. This we handle below by generating the updated #include blocks and
   // comparing it to the original.
-  if (Indices.size() == Includes.size() && llvm::is_sorted(Indices) &&
+  if (Indices.size() == Includes.size() && is_sorted(Indices) &&
       Style.IncludeStyle.IncludeBlocks == tooling::IncludeStyle::IBS_Preserve) 
{
     return;
   }
@@ -3154,7 +3154,7 @@ static void sortCppIncludes(const FormatStyle &Style,
   // FIXME: better error handling. For now, just skip the replacement for the
   // release version.
   if (Err) {
-    llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+    llvm::errs() << toString(std::move(Err)) << "\n";
     assert(false);
   }
 }
@@ -3307,7 +3307,7 @@ static void sortJavaImports(const FormatStyle &Style,
 
   bool StaticImportAfterNormalImport =
       Style.SortJavaStaticImport == FormatStyle::SJSIO_After;
-  llvm::sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
+  sort(Indices, [&](unsigned LHSI, unsigned RHSI) {
     // Negating IsStatic to push static imports above non-static imports.
     return std::make_tuple(!Imports[LHSI].IsStatic ^
                                StaticImportAfterNormalImport,
@@ -3357,7 +3357,7 @@ static void sortJavaImports(const FormatStyle &Style,
   // FIXME: better error handling. For now, just skip the replacement for the
   // release version.
   if (Err) {
-    llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+    llvm::errs() << toString(std::move(Err)) << "\n";
     assert(false);
   }
 }
@@ -3451,7 +3451,7 @@ tooling::Replacements sortIncludes(const FormatStyle 
&Style, StringRef Code,
 }
 
 template <typename T>
-static llvm::Expected<tooling::Replacements>
+static Expected<tooling::Replacements>
 processReplacements(T ProcessFunc, StringRef Code,
                     const tooling::Replacements &Replaces,
                     const FormatStyle &Style) {
@@ -3470,7 +3470,7 @@ processReplacements(T ProcessFunc, StringRef Code,
   return Replaces.merge(FormatReplaces);
 }
 
-llvm::Expected<tooling::Replacements>
+Expected<tooling::Replacements>
 formatReplacements(StringRef Code, const tooling::Replacements &Replaces,
                    const FormatStyle &Style) {
   // We need to use lambda function here since there are two versions of
@@ -3515,13 +3515,13 @@ fixCppIncludeInsertions(StringRef Code, const 
tooling::Replacements &Replaces,
     return Replaces;
 
   tooling::Replacements HeaderInsertions;
-  std::set<llvm::StringRef> HeadersToDelete;
+  std::set<StringRef> HeadersToDelete;
   tooling::Replacements Result;
   for (const auto &R : Replaces) {
     if (isHeaderInsertion(R)) {
       // Replacements from \p Replaces must be conflict-free already, so we can
       // simply consume the error.
-      llvm::consumeError(HeaderInsertions.add(R));
+      consumeError(HeaderInsertions.add(R));
     } else if (isHeaderDeletion(R)) {
       HeadersToDelete.insert(R.getReplacementText());
     } else if (R.getOffset() == UINT_MAX) {
@@ -3529,7 +3529,7 @@ fixCppIncludeInsertions(StringRef Code, const 
tooling::Replacements &Replaces,
                       "not supported! "
                    << R.getReplacementText() << "\n";
     } else {
-      llvm::consumeError(Result.add(R));
+      consumeError(Result.add(R));
     }
   }
   if (HeaderInsertions.empty() && HeadersToDelete.empty())
@@ -3546,13 +3546,12 @@ fixCppIncludeInsertions(StringRef Code, const 
tooling::Replacements &Replaces,
       if (Err) {
         // Ignore the deletion on conflict.
         llvm::errs() << "Failed to add header deletion replacement for "
-                     << Header << ": " << llvm::toString(std::move(Err))
-                     << "\n";
+                     << Header << ": " << toString(std::move(Err)) << "\n";
       }
     }
   }
 
-  llvm::SmallVector<StringRef, 4> Matches;
+  SmallVector<StringRef, 4> Matches;
   for (const auto &R : HeaderInsertions) {
     auto IncludeDirective = R.getReplacementText();
     bool Matched =
@@ -3567,7 +3566,7 @@ fixCppIncludeInsertions(StringRef Code, const 
tooling::Replacements &Replaces,
     if (Replace) {
       auto Err = Result.add(*Replace);
       if (Err) {
-        llvm::consumeError(std::move(Err));
+        consumeError(std::move(Err));
         unsigned NewOffset =
             Result.getShiftedCodePosition(Replace->getOffset());
         auto Shifted = tooling::Replacement(FileName, NewOffset, 0,
@@ -3581,7 +3580,7 @@ fixCppIncludeInsertions(StringRef Code, const 
tooling::Replacements &Replaces,
 
 } // anonymous namespace
 
-llvm::Expected<tooling::Replacements>
+Expected<tooling::Replacements>
 cleanupAroundReplacements(StringRef Code, const tooling::Replacements 
&Replaces,
                           const FormatStyle &Style) {
   // We need to use lambda function here since there are two versions of
@@ -3774,7 +3773,7 @@ reformat(const FormatStyle &Style, StringRef Code,
         auto Err = NonNoOpFixes.add(Fix);
         if (Err) {
           llvm::errs() << "Error adding replacements : "
-                       << llvm::toString(std::move(Err)) << "\n";
+                       << toString(std::move(Err)) << "\n";
         }
       }
     }
@@ -3956,17 +3955,16 @@ loadAndParseConfigFile(StringRef ConfigFile, 
llvm::vfs::FileSystem *FS,
   return Text;
 }
 
-llvm::Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
-                                     StringRef FallbackStyleName,
-                                     StringRef Code, llvm::vfs::FileSystem *FS,
-                                     bool AllowUnknownOptions) {
+Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
+                               StringRef FallbackStyleName, StringRef Code,
+                               llvm::vfs::FileSystem *FS,
+                               bool AllowUnknownOptions) {
   FormatStyle Style = getLLVMStyle(guessLanguage(FileName, Code));
   FormatStyle FallbackStyle = getNoStyle();
   if (!getPredefinedStyle(FallbackStyleName, Style.Language, &FallbackStyle))
     return make_string_error("Invalid fallback style: " + FallbackStyleName);
 
-  llvm::SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 1>
-      ChildFormatTextToApply;
+  SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 1> ChildFormatTextToApply;
 
   if (StyleName.starts_with("{")) {
     // Parse YAML/JSON style from the command line.
@@ -4041,7 +4039,7 @@ llvm::Expected<FormatStyle> getStyle(StringRef StyleName, 
StringRef FileName,
   };
 
   // Look for .clang-format/_clang-format file in the file's parent 
directories.
-  llvm::SmallVector<std::string, 2> FilesToLookFor;
+  SmallVector<std::string, 2> FilesToLookFor;
   FilesToLookFor.push_back(".clang-format");
   FilesToLookFor.push_back("_clang-format");
 

diff  --git a/clang/lib/Format/FormatTokenSource.h 
b/clang/lib/Format/FormatTokenSource.h
index 2b93f302d3603..8f00e5f4582c6 100644
--- a/clang/lib/Format/FormatTokenSource.h
+++ b/clang/lib/Format/FormatTokenSource.h
@@ -173,7 +173,7 @@ class IndexedTokenSource : public FormatTokenSource {
     return Next;
   }
 
-  void dbgToken(int Position, llvm::StringRef Indent = "") {
+  void dbgToken(int Position, StringRef Indent = "") {
     FormatToken *Tok = Tokens[Position];
     llvm::dbgs() << Indent << "[" << Position
                  << "] Token: " << Tok->Tok.getName() << " / " << 
Tok->TokenText

diff  --git a/clang/lib/Format/MacroExpander.cpp 
b/clang/lib/Format/MacroExpander.cpp
index 5a1cdd884c5e6..5768ff37fefcd 100644
--- a/clang/lib/Format/MacroExpander.cpp
+++ b/clang/lib/Format/MacroExpander.cpp
@@ -119,7 +119,7 @@ class MacroExpander::DefinitionParser {
 };
 
 MacroExpander::MacroExpander(
-    const std::vector<std::string> &Macros, clang::SourceManager &SourceMgr,
+    const std::vector<std::string> &Macros, SourceManager &SourceMgr,
     const FormatStyle &Style,
     llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator,
     IdentifierTable &IdentTable)
@@ -134,7 +134,7 @@ MacroExpander::~MacroExpander() = default;
 void MacroExpander::parseDefinition(const std::string &Macro) {
   Buffers.push_back(
       llvm::MemoryBuffer::getMemBufferCopy(Macro, "<scratch space>"));
-  clang::FileID FID = 
SourceMgr.createFileID(Buffers.back()->getMemBufferRef());
+  FileID FID = SourceMgr.createFileID(Buffers.back()->getMemBufferRef());
   FormatTokenLexer Lex(SourceMgr, FID, 0, Style, encoding::Encoding_UTF8,
                        Allocator, IdentTable);
   const auto Tokens = Lex.lex();
@@ -150,20 +150,20 @@ void MacroExpander::parseDefinition(const std::string 
&Macro) {
   }
 }
 
-bool MacroExpander::defined(llvm::StringRef Name) const {
+bool MacroExpander::defined(StringRef Name) const {
   return FunctionLike.contains(Name) || ObjectLike.contains(Name);
 }
 
-bool MacroExpander::objectLike(llvm::StringRef Name) const {
+bool MacroExpander::objectLike(StringRef Name) const {
   return ObjectLike.contains(Name);
 }
 
-bool MacroExpander::hasArity(llvm::StringRef Name, unsigned Arity) const {
+bool MacroExpander::hasArity(StringRef Name, unsigned Arity) const {
   auto it = FunctionLike.find(Name);
   return it != FunctionLike.end() && it->second.contains(Arity);
 }
 
-llvm::SmallVector<FormatToken *, 8>
+SmallVector<FormatToken *, 8>
 MacroExpander::expand(FormatToken *ID,
                       std::optional<ArgsList> OptionalArgs) const {
   if (OptionalArgs)

diff  --git a/clang/lib/Format/Macros.h b/clang/lib/Format/Macros.h
index fb12d22299dea..e05f734b0db8a 100644
--- a/clang/lib/Format/Macros.h
+++ b/clang/lib/Format/Macros.h
@@ -79,7 +79,7 @@ struct UnwrappedLineNode;
 ///
 class MacroExpander {
 public:
-  using ArgsList = llvm::ArrayRef<llvm::SmallVector<FormatToken *, 8>>;
+  using ArgsList = ArrayRef<SmallVector<FormatToken *, 8>>;
 
   /// Construct a macro expander from a set of macro definitions.
   /// Macro definitions must be encoded as UTF-8.
@@ -95,27 +95,27 @@ class MacroExpander {
   /// Macros that cannot be parsed will be silently discarded.
   ///
   MacroExpander(const std::vector<std::string> &Macros,
-                clang::SourceManager &SourceMgr, const FormatStyle &Style,
+                SourceManager &SourceMgr, const FormatStyle &Style,
                 llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator,
                 IdentifierTable &IdentTable);
   ~MacroExpander();
 
   /// Returns whether any macro \p Name is defined, regardless of overloads.
-  bool defined(llvm::StringRef Name) const;
+  bool defined(StringRef Name) const;
 
   /// Returns whetherh there is an object-like overload, i.e. where the macro
   /// has no arguments and should not consume subsequent parentheses.
-  bool objectLike(llvm::StringRef Name) const;
+  bool objectLike(StringRef Name) const;
 
   /// Returns whether macro \p Name provides an overload with the given arity.
-  bool hasArity(llvm::StringRef Name, unsigned Arity) const;
+  bool hasArity(StringRef Name, unsigned Arity) const;
 
   /// Returns the expanded stream of format tokens for \p ID, where
   /// each element in \p Args is a positional argument to the macro call.
   /// If \p Args is not set, the object-like overload is used.
   /// If \p Args is set, the overload with the arity equal to \c Args.size() is
   /// used.
-  llvm::SmallVector<FormatToken *, 8>
+  SmallVector<FormatToken *, 8>
   expand(FormatToken *ID, std::optional<ArgsList> OptionalArgs) const;
 
 private:
@@ -124,7 +124,7 @@ class MacroExpander {
 
   void parseDefinition(const std::string &Macro);
 
-  clang::SourceManager &SourceMgr;
+  SourceManager &SourceMgr;
   const FormatStyle &Style;
   llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator;
   IdentifierTable &IdentTable;
@@ -260,7 +260,7 @@ class MacroCallReconstructor {
     LineNode() = default;
     LineNode(FormatToken *Tok) : Tok(Tok) {}
     FormatToken *Tok = nullptr;
-    llvm::SmallVector<std::unique_ptr<ReconstructedLine>> Children;
+    SmallVector<std::unique_ptr<ReconstructedLine>> Children;
   };
 
   // Line in which we build up the resulting unwrapped line.
@@ -269,7 +269,7 @@ class MacroCallReconstructor {
   struct ReconstructedLine {
     explicit ReconstructedLine(unsigned Level) : Level(Level) {}
     unsigned Level;
-    llvm::SmallVector<std::unique_ptr<LineNode>> Tokens;
+    SmallVector<std::unique_ptr<LineNode>> Tokens;
   };
 
   // The line in which we collect the resulting reconstructed output.
@@ -285,7 +285,7 @@ class MacroCallReconstructor {
 
   // Stack of currently "open" lines, where each line's predecessor's last
   // token is the parent token for that line.
-  llvm::SmallVector<ReconstructedLine *> ActiveReconstructedLines;
+  SmallVector<ReconstructedLine *> ActiveReconstructedLines;
 
   // Maps from the expanded token to the token that takes its place in the
   // reconstructed token stream in terms of parent-child relationships.
@@ -325,7 +325,7 @@ class MacroCallReconstructor {
   };
 
   // Stack of macro calls for which we're in the middle of an expansion.
-  llvm::SmallVector<Expansion> ActiveExpansions;
+  SmallVector<Expansion> ActiveExpansions;
 
   struct MacroCallState {
     MacroCallState(ReconstructedLine *Line, FormatToken *ParentLastToken,
@@ -368,7 +368,7 @@ class MacroCallReconstructor {
   // |- ,
   // |  \- <argument>
   // \- )
-  llvm::SmallVector<MacroCallState> MacroCallStructure;
+  SmallVector<MacroCallState> MacroCallStructure;
 
   // Maps from identifier of the macro call to an unwrapped line containing
   // all tokens of the macro call.

diff  --git a/clang/lib/Format/SortJavaScriptImports.cpp 
b/clang/lib/Format/SortJavaScriptImports.cpp
index 1a6a1b19e7022..1acce26ff2795 100644
--- a/clang/lib/Format/SortJavaScriptImports.cpp
+++ b/clang/lib/Format/SortJavaScriptImports.cpp
@@ -34,8 +34,6 @@ namespace format {
 
 class FormatTokenLexer;
 
-using clang::format::FormatStyle;
-
 // An imported symbol in a JavaScript ES6 import/export, possibly aliased.
 struct JsImportedSymbol {
   StringRef Symbol;
@@ -178,7 +176,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
         }
       }
     }
-    llvm::StringRef PreviousText = getSourceText(InsertionPoint);
+    StringRef PreviousText = getSourceText(InsertionPoint);
     if (ReferencesText == PreviousText)
       return {Result, 0};
 
@@ -209,7 +207,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
     // FIXME: better error handling. For now, just print error message and skip
     // the replacement for the release version.
     if (Err) {
-      llvm::errs() << llvm::toString(std::move(Err)) << "\n";
+      llvm::errs() << toString(std::move(Err)) << "\n";
       assert(false);
     }
 
@@ -276,7 +274,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
         SortChunk.push_back(*Start);
         ++Start;
       }
-      llvm::stable_sort(SortChunk);
+      stable_sort(SortChunk);
       mergeModuleReferences(SortChunk);
       ReferencesSorted.insert(ReferencesSorted.end(), SortChunk.begin(),
                               SortChunk.end());
@@ -334,10 +332,10 @@ class JavaScriptImportSorter : public TokenAnalyzer {
     // Sort the individual symbols within the import.
     // E.g. `import {b, a} from 'x';` -> `import {a, b} from 'x';`
     SmallVector<JsImportedSymbol, 1> Symbols = Reference.Symbols;
-    llvm::stable_sort(
-        Symbols, [&](const JsImportedSymbol &LHS, const JsImportedSymbol &RHS) 
{
-          return LHS.Symbol.compare_insensitive(RHS.Symbol) < 0;
-        });
+    stable_sort(Symbols,
+                [&](const JsImportedSymbol &LHS, const JsImportedSymbol &RHS) {
+                  return LHS.Symbol.compare_insensitive(RHS.Symbol) < 0;
+                });
     if (!Reference.SymbolsMerged && Symbols == Reference.Symbols) {
       // Symbols didn't change, just emit the entire module reference.
       StringRef ReferenceStmt = getSourceText(Reference.Range);
@@ -349,7 +347,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
     // ... then the references in order ...
     if (!Symbols.empty()) {
       Buffer += getSourceText(Symbols.front().Range);
-      for (const JsImportedSymbol &Symbol : llvm::drop_begin(Symbols)) {
+      for (const JsImportedSymbol &Symbol : drop_begin(Symbols)) {
         Buffer += ",";
         Buffer += getSourceText(Symbol.Range);
       }

diff  --git a/clang/tools/clang-format/ClangFormat.cpp 
b/clang/tools/clang-format/ClangFormat.cpp
index 3fa5f81a35768..50dd073c41255 100644
--- a/clang/tools/clang-format/ClangFormat.cpp
+++ b/clang/tools/clang-format/ClangFormat.cpp
@@ -352,7 +352,7 @@ emitReplacementWarnings(const Replacements &Replaces, 
StringRef AssumedFileName,
 
   unsigned Errors = 0;
   if (WarnFormat && !NoWarnFormat) {
-    llvm::SourceMgr Mgr;
+    SourceMgr Mgr;
     const char *StartBuf = Code->getBufferStart();
 
     Mgr.AddNewSourceBuffer(
@@ -447,11 +447,11 @@ static bool format(StringRef FileName, bool 
ErrorOnIncompleteFormat = false) {
     return true;
   }
 
-  llvm::Expected<FormatStyle> FormatStyle =
+  Expected<FormatStyle> FormatStyle =
       getStyle(Style, AssumedFileName, FallbackStyle, Code->getBuffer(),
                nullptr, WNoErrorList.isSet(WNoError::Unknown));
   if (!FormatStyle) {
-    llvm::errs() << llvm::toString(FormatStyle.takeError()) << "\n";
+    llvm::errs() << toString(FormatStyle.takeError()) << "\n";
     return true;
   }
 
@@ -497,7 +497,7 @@ static bool format(StringRef FileName, bool 
ErrorOnIncompleteFormat = false) {
 
   auto ChangedCode = tooling::applyAllReplacements(Code->getBuffer(), 
Replaces);
   if (!ChangedCode) {
-    llvm::errs() << llvm::toString(ChangedCode.takeError()) << "\n";
+    llvm::errs() << toString(ChangedCode.takeError()) << "\n";
     return true;
   }
   // Get new affected ranges after sorting `#includes`.
@@ -567,14 +567,12 @@ static int dumpConfig() {
     }
     Code = std::move(CodeOrErr.get());
   }
-  llvm::Expected<clang::format::FormatStyle> FormatStyle =
-      clang::format::getStyle(Style,
-                              FileNames.empty() || FileNames[0] == "-"
-                                  ? AssumeFileName
-                                  : FileNames[0],
-                              FallbackStyle, Code ? Code->getBuffer() : "");
+  Expected<clang::format::FormatStyle> FormatStyle = clang::format::getStyle(
+      Style,
+      FileNames.empty() || FileNames[0] == "-" ? AssumeFileName : FileNames[0],
+      FallbackStyle, Code ? Code->getBuffer() : "");
   if (!FormatStyle) {
-    llvm::errs() << llvm::toString(FormatStyle.takeError()) << "\n";
+    llvm::errs() << toString(FormatStyle.takeError()) << "\n";
     return 1;
   }
   std::string Config = clang::format::configurationAsText(*FormatStyle);
@@ -671,7 +669,7 @@ static bool isIgnored(StringRef FilePath) {
 }
 
 int main(int argc, const char **argv) {
-  llvm::InitLLVM X(argc, argv);
+  InitLLVM X(argc, argv);
 
   cl::HideUnrelatedOptions(ClangFormatCategory);
 

diff  --git a/clang/unittests/Format/CleanupTest.cpp 
b/clang/unittests/Format/CleanupTest.cpp
index dc149b502bc52..a3801106e1ceb 100644
--- a/clang/unittests/Format/CleanupTest.cpp
+++ b/clang/unittests/Format/CleanupTest.cpp
@@ -20,10 +20,9 @@ namespace clang {
 namespace format {
 namespace {
 
-class CleanupTest : public ::testing::Test {
+class CleanupTest : public testing::Test {
 protected:
-  std::string cleanup(llvm::StringRef Code,
-                      const std::vector<tooling::Range> &Ranges,
+  std::string cleanup(StringRef Code, const std::vector<tooling::Range> 
&Ranges,
                       const FormatStyle &Style = getLLVMStyle()) {
     tooling::Replacements Replaces = format::cleanup(Style, Code, Ranges);
 
@@ -33,8 +32,7 @@ class CleanupTest : public ::testing::Test {
   }
 
   // Returns code after cleanup around \p Offsets.
-  std::string cleanupAroundOffsets(llvm::ArrayRef<unsigned> Offsets,
-                                   llvm::StringRef Code,
+  std::string cleanupAroundOffsets(ArrayRef<unsigned> Offsets, StringRef Code,
                                    const FormatStyle &Style = getLLVMStyle()) {
     std::vector<tooling::Range> Ranges;
     for (auto Offset : Offsets)
@@ -332,7 +330,7 @@ class CleanUpReplacementsTest : public ReplacementTest {
                            const tooling::Replacements &Replaces) {
     auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
     EXPECT_TRUE(static_cast<bool>(CleanReplaces))
-        << llvm::toString(CleanReplaces.takeError()) << "\n";
+        << toString(CleanReplaces.takeError()) << "\n";
     auto Result = applyAllReplacements(Code, *CleanReplaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     return *Result;
@@ -342,10 +340,10 @@ class CleanUpReplacementsTest : public ReplacementTest {
                                     const tooling::Replacements &Replaces) {
     auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
     EXPECT_TRUE(static_cast<bool>(CleanReplaces))
-        << llvm::toString(CleanReplaces.takeError()) << "\n";
+        << toString(CleanReplaces.takeError()) << "\n";
     auto FormattedReplaces = formatReplacements(Code, *CleanReplaces, Style);
     EXPECT_TRUE(static_cast<bool>(FormattedReplaces))
-        << llvm::toString(FormattedReplaces.takeError()) << "\n";
+        << toString(FormattedReplaces.takeError()) << "\n";
     auto Result = applyAllReplacements(Code, *FormattedReplaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     return *Result;

diff  --git a/clang/unittests/Format/DefinitionBlockSeparatorTest.cpp 
b/clang/unittests/Format/DefinitionBlockSeparatorTest.cpp
index 7a120935cfa96..b26b9f4f4ff62 100644
--- a/clang/unittests/Format/DefinitionBlockSeparatorTest.cpp
+++ b/clang/unittests/Format/DefinitionBlockSeparatorTest.cpp
@@ -18,10 +18,10 @@ namespace clang {
 namespace format {
 namespace {
 
-class DefinitionBlockSeparatorTest : public ::testing::Test {
+class DefinitionBlockSeparatorTest : public testing::Test {
 protected:
   static std::string
-  separateDefinitionBlocks(llvm::StringRef Code,
+  separateDefinitionBlocks(StringRef Code,
                            const std::vector<tooling::Range> &Ranges,
                            const FormatStyle &Style = getLLVMStyle()) {
     LLVM_DEBUG(llvm::errs() << "---\n");
@@ -34,18 +34,17 @@ class DefinitionBlockSeparatorTest : public ::testing::Test 
{
   }
 
   static std::string
-  separateDefinitionBlocks(llvm::StringRef Code,
+  separateDefinitionBlocks(StringRef Code,
                            const FormatStyle &Style = getLLVMStyle()) {
     return separateDefinitionBlocks(
         Code,
         /*Ranges=*/{1, tooling::Range(0, Code.size())}, Style);
   }
 
-  static void _verifyFormat(const char *File, int Line, llvm::StringRef Code,
+  static void _verifyFormat(const char *File, int Line, StringRef Code,
                             const FormatStyle &Style = getLLVMStyle(),
-                            llvm::StringRef ExpectedCode = "",
-                            bool Inverse = true) {
-    ::testing::ScopedTrace t(File, Line, ::testing::Message() << Code.str());
+                            StringRef ExpectedCode = "", bool Inverse = true) {
+    testing::ScopedTrace t(File, Line, testing::Message() << Code.str());
     bool HasOriginalCode = true;
     if (ExpectedCode == "") {
       ExpectedCode = Code;
@@ -70,7 +69,7 @@ class DefinitionBlockSeparatorTest : public ::testing::Test {
     EXPECT_EQ(ExpectedCode, Result) << "Test failed. Formatted:\n" << Result;
   }
 
-  static std::string removeEmptyLines(llvm::StringRef Code) {
+  static std::string removeEmptyLines(StringRef Code) {
     std::string Result = "";
     for (auto Char : Code.str()) {
       if (Result.size()) {
@@ -165,13 +164,13 @@ TEST_F(DefinitionBlockSeparatorTest, Basic) {
 TEST_F(DefinitionBlockSeparatorTest, FormatConflict) {
   FormatStyle Style = getLLVMStyle();
   Style.SeparateDefinitionBlocks = FormatStyle::SDS_Always;
-  llvm::StringRef Code = "class Test {\n"
-                         "public:\n"
-                         "  static void foo() {\n"
-                         "    int t;\n"
-                         "    return 1;\n"
-                         "  }\n"
-                         "};";
+  StringRef Code = "class Test {\n"
+                   "public:\n"
+                   "  static void foo() {\n"
+                   "    int t;\n"
+                   "    return 1;\n"
+                   "  }\n"
+                   "};";
   std::vector<tooling::Range> Ranges = {1, tooling::Range(0, Code.size())};
   EXPECT_EQ(reformat(Style, Code, Ranges, "<stdin>").size(), 0u);
 }

diff  --git a/clang/unittests/Format/FormatTestBase.h 
b/clang/unittests/Format/FormatTestBase.h
index eaadb1c9f83e5..33110ca5d9edf 100644
--- a/clang/unittests/Format/FormatTestBase.h
+++ b/clang/unittests/Format/FormatTestBase.h
@@ -25,17 +25,17 @@ namespace test {
 
 #define DEBUG_TYPE "format-test-base"
 
-class FormatTestBase : public ::testing::Test {
+class FormatTestBase : public testing::Test {
 protected:
   enum StatusCheck { SC_ExpectComplete, SC_ExpectIncomplete, SC_DoNotCheck };
 
   virtual FormatStyle getDefaultStyle() const { return getLLVMStyle(); }
 
-  virtual std::string messUp(llvm::StringRef Code) const {
+  virtual std::string messUp(StringRef Code) const {
     return test::messUp(Code);
   }
 
-  std::string format(llvm::StringRef Code,
+  std::string format(StringRef Code,
                      const std::optional<FormatStyle> &Style = {},
                      StatusCheck CheckComplete = SC_ExpectComplete,
                      const std::vector<tooling::Range> &Ranges = {}) {
@@ -80,11 +80,11 @@ class FormatTestBase : public ::testing::Test {
     return Style;
   }
 
-  bool _verifyFormat(const char *File, int Line, llvm::StringRef Expected,
-                     llvm::StringRef Code,
+  bool _verifyFormat(const char *File, int Line, StringRef Expected,
+                     StringRef Code,
                      const std::optional<FormatStyle> &Style = {},
                      const std::vector<tooling::Range> &Ranges = {}) {
-    testing::ScopedTrace t(File, Line, ::testing::Message() << Code.str());
+    testing::ScopedTrace t(File, Line, testing::Message() << Code.str());
     const auto ExpectedCode{Expected.str()};
     auto FormattedCode{format(Code, Style, SC_ExpectComplete, Ranges)};
     EXPECT_EQ(ExpectedCode, FormattedCode);
@@ -111,7 +111,7 @@ class FormatTestBase : public ::testing::Test {
     return true;
   }
 
-  void _verifyFormat(const char *File, int Line, llvm::StringRef Code,
+  void _verifyFormat(const char *File, int Line, StringRef Code,
                      const std::optional<FormatStyle> &Style = {}) {
     if (!_verifyFormat(File, Line, Code, Code, Style))
       return;
@@ -119,27 +119,26 @@ class FormatTestBase : public ::testing::Test {
       _verifyFormat(File, Line, Code, MessedUpCode, Style);
   }
 
-  void _verifyIncompleteFormat(const char *File, int Line, llvm::StringRef 
Code,
+  void _verifyIncompleteFormat(const char *File, int Line, StringRef Code,
                                const std::optional<FormatStyle> &Style = {}) {
-    testing::ScopedTrace t(File, Line, ::testing::Message() << Code.str());
+    testing::ScopedTrace t(File, Line, testing::Message() << Code.str());
     EXPECT_EQ(Code.str(), format(messUp(Code), Style, SC_ExpectIncomplete));
   }
 
   void
-  _verifyIndependentOfContext(const char *File, int Line, llvm::StringRef Text,
+  _verifyIndependentOfContext(const char *File, int Line, StringRef Text,
                               const std::optional<FormatStyle> &Style = {}) {
     _verifyFormat(File, Line, Text, Style);
-    _verifyFormat(File, Line, llvm::Twine("void f() { " + Text + " }").str(),
-                  Style);
+    _verifyFormat(File, Line, Twine("void f() { " + Text + " }").str(), Style);
   }
 
-  void _verifyNoChange(const char *File, int Line, llvm::StringRef Code,
+  void _verifyNoChange(const char *File, int Line, StringRef Code,
                        const std::optional<FormatStyle> &Style = {}) {
     _verifyFormat(File, Line, Code, Code, Style);
   }
 
   /// \brief Verify that clang-format does not crash on the given input.
-  void verifyNoCrash(llvm::StringRef Code,
+  void verifyNoCrash(StringRef Code,
                      const std::optional<FormatStyle> &Style = {}) {
     format(Code, Style, SC_DoNotCheck);
   }

diff  --git a/clang/unittests/Format/FormatTestCSharp.cpp 
b/clang/unittests/Format/FormatTestCSharp.cpp
index de261c0948308..7166e4ec4de30 100644
--- a/clang/unittests/Format/FormatTestCSharp.cpp
+++ b/clang/unittests/Format/FormatTestCSharp.cpp
@@ -21,8 +21,8 @@ class FormatTestCSharp : public test::FormatTestBase {
     return getMicrosoftStyle(FormatStyle::LK_CSharp);
   }
 
-  static std::string format(llvm::StringRef Code, unsigned Offset,
-                            unsigned Length, const FormatStyle &Style) {
+  static std::string format(StringRef Code, unsigned Offset, unsigned Length,
+                            const FormatStyle &Style) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
@@ -34,7 +34,7 @@ class FormatTestCSharp : public test::FormatTestBase {
   }
 
   static std::string
-  format(llvm::StringRef Code,
+  format(StringRef Code,
          const FormatStyle &Style = getMicrosoftStyle(FormatStyle::LK_CSharp)) 
{
     return format(Code, 0, Code.size(), Style);
   }

diff  --git a/clang/unittests/Format/FormatTestJS.cpp 
b/clang/unittests/Format/FormatTestJS.cpp
index 3aded8f3726d8..b910ce620de7a 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -16,10 +16,10 @@
 namespace clang {
 namespace format {
 
-class FormatTestJS : public ::testing::Test {
+class FormatTestJS : public testing::Test {
 protected:
-  static std::string format(llvm::StringRef Code, unsigned Offset,
-                            unsigned Length, const FormatStyle &Style) {
+  static std::string format(StringRef Code, unsigned Offset, unsigned Length,
+                            const FormatStyle &Style) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
@@ -34,7 +34,7 @@ class FormatTestJS : public ::testing::Test {
   }
 
   static std::string format(
-      llvm::StringRef Code,
+      StringRef Code,
       const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) {
     return format(Code, 0, Code.size(), Style);
   }
@@ -46,7 +46,7 @@ class FormatTestJS : public ::testing::Test {
   }
 
   static void verifyFormat(
-      llvm::StringRef Code,
+      StringRef Code,
       const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) {
     EXPECT_EQ(Code.str(), format(Code, Style)) << "Expected code is not 
stable";
     std::string Result = format(test::messUp(Code), Style);
@@ -54,7 +54,7 @@ class FormatTestJS : public ::testing::Test {
   }
 
   static void verifyFormat(
-      llvm::StringRef Expected, llvm::StringRef Code,
+      StringRef Expected, StringRef Code,
       const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript)) {
     EXPECT_EQ(Expected.str(), format(Expected, Style))
         << "Expected code is not stable";

diff  --git a/clang/unittests/Format/FormatTestJson.cpp 
b/clang/unittests/Format/FormatTestJson.cpp
index 3254802dc0d60..60e9f17855f72 100644
--- a/clang/unittests/Format/FormatTestJson.cpp
+++ b/clang/unittests/Format/FormatTestJson.cpp
@@ -16,10 +16,10 @@
 namespace clang {
 namespace format {
 
-class FormatTestJson : public ::testing::Test {
+class FormatTestJson : public testing::Test {
 protected:
-  static std::string format(llvm::StringRef Code, unsigned Offset,
-                            unsigned Length, const FormatStyle &Style) {
+  static std::string format(StringRef Code, unsigned Offset, unsigned Length,
+                            const FormatStyle &Style) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
 
@@ -47,7 +47,7 @@ class FormatTestJson : public ::testing::Test {
   }
 
   static std::string
-  format(llvm::StringRef Code,
+  format(StringRef Code,
          const FormatStyle &Style = getLLVMStyle(FormatStyle::LK_Json)) {
     return format(Code, 0, Code.size(), Style);
   }
@@ -58,13 +58,12 @@ class FormatTestJson : public ::testing::Test {
     return Style;
   }
 
-  static void verifyFormatStable(llvm::StringRef Code,
-                                 const FormatStyle &Style) {
+  static void verifyFormatStable(StringRef Code, const FormatStyle &Style) {
     EXPECT_EQ(Code.str(), format(Code, Style)) << "Expected code is not 
stable";
   }
 
   static void
-  verifyFormat(llvm::StringRef Code,
+  verifyFormat(StringRef Code,
                const FormatStyle &Style = getLLVMStyle(FormatStyle::LK_Json)) {
     verifyFormatStable(Code, Style);
     EXPECT_EQ(Code.str(), format(test::messUp(Code), Style));

diff  --git a/clang/unittests/Format/FormatTestProto.cpp 
b/clang/unittests/Format/FormatTestProto.cpp
index 4a2d2d68248d3..5adb532ae4a41 100644
--- a/clang/unittests/Format/FormatTestProto.cpp
+++ b/clang/unittests/Format/FormatTestProto.cpp
@@ -16,10 +16,10 @@
 namespace clang {
 namespace format {
 
-class FormatTestProto : public ::testing::Test {
+class FormatTestProto : public testing::Test {
 protected:
-  static std::string format(llvm::StringRef Code, unsigned Offset,
-                            unsigned Length, const FormatStyle &Style) {
+  static std::string format(StringRef Code, unsigned Offset, unsigned Length,
+                            const FormatStyle &Style) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
@@ -30,13 +30,13 @@ class FormatTestProto : public ::testing::Test {
     return *Result;
   }
 
-  static std::string format(llvm::StringRef Code) {
+  static std::string format(StringRef Code) {
     FormatStyle Style = getGoogleStyle(FormatStyle::LK_Proto);
     Style.ColumnLimit = 60; // To make writing tests easier.
     return format(Code, 0, Code.size(), Style);
   }
 
-  static void verifyFormat(llvm::StringRef Code) {
+  static void verifyFormat(StringRef Code) {
     EXPECT_EQ(Code.str(), format(Code)) << "Expected code is not stable";
     EXPECT_EQ(Code.str(), format(test::messUp(Code)));
   }

diff  --git a/clang/unittests/Format/FormatTestRawStrings.cpp 
b/clang/unittests/Format/FormatTestRawStrings.cpp
index 10f341cc8f799..0615fb1fad4c5 100644
--- a/clang/unittests/Format/FormatTestRawStrings.cpp
+++ b/clang/unittests/Format/FormatTestRawStrings.cpp
@@ -21,12 +21,11 @@ namespace clang {
 namespace format {
 namespace {
 
-class FormatTestRawStrings : public ::testing::Test {
+class FormatTestRawStrings : public testing::Test {
 protected:
   enum StatusCheck { SC_ExpectComplete, SC_ExpectIncomplete, SC_DoNotCheck };
 
-  std::string format(llvm::StringRef Code,
-                     const FormatStyle &Style = getLLVMStyle(),
+  std::string format(StringRef Code, const FormatStyle &Style = getLLVMStyle(),
                      StatusCheck CheckComplete = SC_ExpectComplete) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");

diff  --git a/clang/unittests/Format/FormatTestSelective.cpp 
b/clang/unittests/Format/FormatTestSelective.cpp
index c21c9bfe60790..3ae70a15d359b 100644
--- a/clang/unittests/Format/FormatTestSelective.cpp
+++ b/clang/unittests/Format/FormatTestSelective.cpp
@@ -17,9 +17,9 @@ namespace clang {
 namespace format {
 namespace {
 
-class FormatTestSelective : public ::testing::Test {
+class FormatTestSelective : public testing::Test {
 protected:
-  std::string format(llvm::StringRef Code, unsigned Offset, unsigned Length) {
+  std::string format(StringRef Code, unsigned Offset, unsigned Length) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));

diff  --git a/clang/unittests/Format/FormatTestTableGen.cpp 
b/clang/unittests/Format/FormatTestTableGen.cpp
index 79b6961b00b42..7771f6a109a9a 100644
--- a/clang/unittests/Format/FormatTestTableGen.cpp
+++ b/clang/unittests/Format/FormatTestTableGen.cpp
@@ -16,10 +16,10 @@
 namespace clang {
 namespace format {
 
-class FormatTestTableGen : public ::testing::Test {
+class FormatTestTableGen : public testing::Test {
 protected:
-  static std::string format(llvm::StringRef Code, unsigned Offset,
-                            unsigned Length, const FormatStyle &Style) {
+  static std::string format(StringRef Code, unsigned Offset, unsigned Length,
+                            const FormatStyle &Style) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     std::vector<tooling::Range> Ranges(1, tooling::Range(Offset, Length));
@@ -30,22 +30,22 @@ class FormatTestTableGen : public ::testing::Test {
     return *Result;
   }
 
-  static std::string format(llvm::StringRef Code) {
+  static std::string format(StringRef Code) {
     FormatStyle Style = getGoogleStyle(FormatStyle::LK_TableGen);
     Style.ColumnLimit = 60; // To make writing tests easier.
     return format(Code, 0, Code.size(), Style);
   }
 
-  static void verifyFormat(llvm::StringRef Code) {
+  static void verifyFormat(StringRef Code) {
     EXPECT_EQ(Code.str(), format(Code)) << "Expected code is not stable";
     EXPECT_EQ(Code.str(), format(test::messUp(Code)));
   }
 
-  static void verifyFormat(llvm::StringRef Result, llvm::StringRef MessedUp) {
+  static void verifyFormat(StringRef Result, StringRef MessedUp) {
     EXPECT_EQ(Result, format(MessedUp));
   }
 
-  static void verifyFormat(llvm::StringRef Code, const FormatStyle &Style) {
+  static void verifyFormat(StringRef Code, const FormatStyle &Style) {
     EXPECT_EQ(Code.str(), format(Code, 0, Code.size(), Style))
         << "Expected code is not stable";
     auto MessUp = test::messUp(Code);

diff  --git a/clang/unittests/Format/FormatTestUtils.h 
b/clang/unittests/Format/FormatTestUtils.h
index fa42b61c547d5..cb55b2d747b62 100644
--- a/clang/unittests/Format/FormatTestUtils.h
+++ b/clang/unittests/Format/FormatTestUtils.h
@@ -27,7 +27,7 @@ inline FormatStyle getGoogleStyle() {
 // When HandleHash is false, preprocessor directives starting with hash will 
not
 // be on separate lines.  This is needed because Verilog uses hash for other
 // purposes.
-inline std::string messUp(llvm::StringRef Code, bool HandleHash = true) {
+inline std::string messUp(StringRef Code, bool HandleHash = true) {
   std::string MessedUp(Code.str());
   bool InComment = false;
   bool InPreprocessorDirective = false;

diff  --git a/clang/unittests/Format/FormatTestVerilog.cpp 
b/clang/unittests/Format/FormatTestVerilog.cpp
index abebf9f7d4c78..b5241a4e0d6ae 100644
--- a/clang/unittests/Format/FormatTestVerilog.cpp
+++ b/clang/unittests/Format/FormatTestVerilog.cpp
@@ -19,7 +19,7 @@ class FormatTestVerilog : public test::FormatTestBase {
   FormatStyle getDefaultStyle() const override {
     return getLLVMStyle(FormatStyle::LK_Verilog);
   }
-  std::string messUp(llvm::StringRef Code) const override {
+  std::string messUp(StringRef Code) const override {
     return test::messUp(Code, /*HandleHash=*/false);
   }
 };

diff  --git a/clang/unittests/Format/FormatTokenSourceTest.cpp 
b/clang/unittests/Format/FormatTokenSourceTest.cpp
index 74de93057df6a..4f19e255004fc 100644
--- a/clang/unittests/Format/FormatTokenSourceTest.cpp
+++ b/clang/unittests/Format/FormatTokenSourceTest.cpp
@@ -15,10 +15,9 @@ namespace clang {
 namespace format {
 namespace {
 
-class IndexedTokenSourceTest : public ::testing::Test {
+class IndexedTokenSourceTest : public testing::Test {
 protected:
-  TokenList lex(llvm::StringRef Code,
-                const FormatStyle &Style = getLLVMStyle()) {
+  TokenList lex(StringRef Code, const FormatStyle &Style = getLLVMStyle()) {
     return TestLexer(Allocator, Buffers, Style).lex(Code);
   }
   llvm::SpecificBumpPtrAllocator<FormatToken> Allocator;

diff  --git a/clang/unittests/Format/MacroCallReconstructorTest.cpp 
b/clang/unittests/Format/MacroCallReconstructorTest.cpp
index 9df21eae70cb7..acef5e79eaaea 100644
--- a/clang/unittests/Format/MacroCallReconstructorTest.cpp
+++ b/clang/unittests/Format/MacroCallReconstructorTest.cpp
@@ -30,15 +30,14 @@ class Expansion {
   // Appends the token stream obtained from expanding the macro Name given
   // the provided arguments, to be later retrieved with getTokens().
   // Returns the list of tokens making up the unexpanded macro call.
-  TokenList
-  expand(llvm::StringRef Name,
-         const SmallVector<llvm::SmallVector<FormatToken *, 8>, 1> &Args) {
+  TokenList expand(StringRef Name,
+                   const SmallVector<SmallVector<FormatToken *, 8>, 1> &Args) {
     return expandInternal(Name, Args);
   }
 
-  TokenList expand(llvm::StringRef Name) { return expandInternal(Name, {}); }
+  TokenList expand(StringRef Name) { return expandInternal(Name, {}); }
 
-  TokenList expand(llvm::StringRef Name, const std::vector<std::string> &Args) 
{
+  TokenList expand(StringRef Name, const std::vector<std::string> &Args) {
     return expandInternal(Name, lexArgs(Args));
   }
 
@@ -48,8 +47,8 @@ class Expansion {
 
 private:
   TokenList expandInternal(
-      llvm::StringRef Name,
-      const std::optional<SmallVector<llvm::SmallVector<FormatToken *, 8>, 1>>
+      StringRef Name,
+      const std::optional<SmallVector<SmallVector<FormatToken *, 8>, 1>>
           &Args) {
     auto *ID = Lex.id(Name);
     auto UnexpandedLine = std::make_unique<UnwrappedLine>();
@@ -75,26 +74,25 @@ class Expansion {
     return UnexpandedTokens;
   }
 
-  llvm::SmallVector<TokenList, 1>
-  lexArgs(const std::vector<std::string> &Args) {
-    llvm::SmallVector<TokenList, 1> Result;
+  SmallVector<TokenList, 1> lexArgs(const std::vector<std::string> &Args) {
+    SmallVector<TokenList, 1> Result;
     for (const auto &Arg : Args)
       Result.push_back(uneof(Lex.lex(Arg)));
     return Result;
   }
   llvm::DenseMap<FormatToken *, std::unique_ptr<UnwrappedLine>> Unexpanded;
-  llvm::SmallVector<FormatToken *, 8> Tokens;
+  SmallVector<FormatToken *, 8> Tokens;
   TestLexer &Lex;
   MacroExpander &Macros;
 };
 
 struct Chunk {
-  Chunk(llvm::ArrayRef<FormatToken *> Tokens)
+  Chunk(ArrayRef<FormatToken *> Tokens)
       : Tokens(Tokens.begin(), Tokens.end()) {}
-  Chunk(llvm::ArrayRef<UnwrappedLine> Children)
+  Chunk(ArrayRef<UnwrappedLine> Children)
       : Children(Children.begin(), Children.end()) {}
-  llvm::SmallVector<UnwrappedLineNode, 1> Tokens;
-  llvm::SmallVector<UnwrappedLine, 0> Children;
+  SmallVector<UnwrappedLineNode, 1> Tokens;
+  SmallVector<UnwrappedLine, 0> Children;
 };
 
 // Allows to produce chunks of a token list by typing the code of equal tokens.
@@ -140,7 +138,7 @@ UnexpandedMap mergeUnexpanded(const UnexpandedMap &M1,
   return Result;
 }
 
-class MacroCallReconstructorTest : public ::testing::Test {
+class MacroCallReconstructorTest : public testing::Test {
 public:
   MacroCallReconstructorTest() : Lex(Allocator, Buffers) {}
 
@@ -151,7 +149,7 @@ class MacroCallReconstructorTest : public ::testing::Test {
                                            Lex.Allocator, Lex.IdentTable);
   }
 
-  UnwrappedLine line(llvm::ArrayRef<FormatToken *> Tokens, unsigned Level = 0) 
{
+  UnwrappedLine line(ArrayRef<FormatToken *> Tokens, unsigned Level = 0) {
     UnwrappedLine Result;
     Result.Level = Level;
     for (FormatToken *Tok : Tokens)
@@ -159,11 +157,11 @@ class MacroCallReconstructorTest : public ::testing::Test 
{
     return Result;
   }
 
-  UnwrappedLine line(llvm::StringRef Text, unsigned Level = 0) {
+  UnwrappedLine line(StringRef Text, unsigned Level = 0) {
     return line({lex(Text)}, Level);
   }
 
-  UnwrappedLine line(llvm::ArrayRef<Chunk> Chunks, unsigned Level = 0) {
+  UnwrappedLine line(ArrayRef<Chunk> Chunks, unsigned Level = 0) {
     UnwrappedLine Result;
     Result.Level = Level;
     for (const Chunk &Chunk : Chunks) {
@@ -176,13 +174,11 @@ class MacroCallReconstructorTest : public ::testing::Test 
{
     return Result;
   }
 
-  TokenList lex(llvm::StringRef Text) { return uneof(Lex.lex(Text)); }
+  TokenList lex(StringRef Text) { return uneof(Lex.lex(Text)); }
 
-  Chunk tokens(llvm::StringRef Text) { return Chunk(lex(Text)); }
+  Chunk tokens(StringRef Text) { return Chunk(lex(Text)); }
 
-  Chunk children(llvm::ArrayRef<UnwrappedLine> Children) {
-    return Chunk(Children);
-  }
+  Chunk children(ArrayRef<UnwrappedLine> Children) { return Chunk(Children); }
 
   llvm::SpecificBumpPtrAllocator<FormatToken> Allocator;
   std::vector<std::unique_ptr<llvm::MemoryBuffer>> Buffers;

diff  --git a/clang/unittests/Format/MacroExpanderTest.cpp 
b/clang/unittests/Format/MacroExpanderTest.cpp
index 72302aa0cea7e..e001c986dc2b8 100644
--- a/clang/unittests/Format/MacroExpanderTest.cpp
+++ b/clang/unittests/Format/MacroExpanderTest.cpp
@@ -9,7 +9,7 @@ namespace format {
 
 namespace {
 
-class MacroExpanderTest : public ::testing::Test {
+class MacroExpanderTest : public testing::Test {
 public:
   MacroExpanderTest() : Lex(Allocator, Buffers) {}
   std::unique_ptr<MacroExpander>
@@ -19,33 +19,32 @@ class MacroExpanderTest : public ::testing::Test {
                                            Lex.Allocator, Lex.IdentTable);
   }
 
-  std::string expand(MacroExpander &Macros, llvm::StringRef Name) {
+  std::string expand(MacroExpander &Macros, StringRef Name) {
     EXPECT_TRUE(Macros.defined(Name))
         << "Macro not defined: \"" << Name << "\"";
     return text(Macros.expand(Lex.id(Name), {}));
   }
 
-  std::string expand(MacroExpander &Macros, llvm::StringRef Name,
+  std::string expand(MacroExpander &Macros, StringRef Name,
                      const std::vector<std::string> &Args) {
     EXPECT_TRUE(Macros.defined(Name))
         << "Macro not defined: \"" << Name << "\"";
     return text(Macros.expand(Lex.id(Name), lexArgs(Args)));
   }
 
-  llvm::SmallVector<TokenList, 1>
-  lexArgs(const std::vector<std::string> &Args) {
-    llvm::SmallVector<TokenList, 1> Result;
+  SmallVector<TokenList, 1> lexArgs(const std::vector<std::string> &Args) {
+    SmallVector<TokenList, 1> Result;
     for (const auto &Arg : Args)
       Result.push_back(uneof(Lex.lex(Arg)));
     return Result;
   }
 
   struct MacroAttributes {
-    clang::tok::TokenKind Kind;
+    tok::TokenKind Kind;
     MacroRole Role;
     unsigned Start;
     unsigned End;
-    llvm::SmallVector<FormatToken *, 1> ExpandedFrom;
+    SmallVector<FormatToken *, 1> ExpandedFrom;
   };
 
   void expectAttributes(const TokenList &Tokens,
@@ -56,8 +55,8 @@ class MacroExpanderTest : public ::testing::Test {
       if (I >= Attributes.size())
         continue;
       std::string Context =
-          ("for token " + llvm::Twine(I) + ": " + Tokens[I]->Tok.getName() +
-           " / " + Tokens[I]->TokenText)
+          ("for token " + Twine(I) + ": " + Tokens[I]->Tok.getName() + " / " +
+           Tokens[I]->TokenText)
               .str();
       EXPECT_TRUE(Tokens[I]->is(Attributes[I].Kind))
           << Context << " in " << text(Tokens) << " at " << File << ":" << 
Line;

diff  --git a/clang/unittests/Format/MatchFilePathTest.cpp 
b/clang/unittests/Format/MatchFilePathTest.cpp
index 55723584ddc80..f41cf7f971596 100644
--- a/clang/unittests/Format/MatchFilePathTest.cpp
+++ b/clang/unittests/Format/MatchFilePathTest.cpp
@@ -13,7 +13,7 @@ namespace clang {
 namespace format {
 namespace {
 
-class MatchFilePathTest : public ::testing::Test {
+class MatchFilePathTest : public testing::Test {
 protected:
   bool match(llvm::StringRef FilePath, llvm::StringRef Pattern) {
     return matchFilePath(Pattern, FilePath);

diff  --git a/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp 
b/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
index fe097e9961e2e..2c45ad1cbe1c8 100644
--- a/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
+++ b/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
@@ -17,16 +17,16 @@ namespace clang {
 namespace format {
 namespace {
 
-class NamespaceEndCommentsFixerTest : public ::testing::Test {
+class NamespaceEndCommentsFixerTest : public testing::Test {
 protected:
   std::string
-  fixNamespaceEndComments(llvm::StringRef Code,
+  fixNamespaceEndComments(StringRef Code,
                           const std::vector<tooling::Range> &Ranges,
                           const FormatStyle &Style = getLLVMStyle()) {
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     tooling::Replacements Replaces =
-        clang::format::fixNamespaceEndComments(Style, Code, Ranges, "<stdin>");
+        format::fixNamespaceEndComments(Style, Code, Ranges, "<stdin>");
     auto Result = applyAllReplacements(Code, Replaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     LLVM_DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
@@ -34,7 +34,7 @@ class NamespaceEndCommentsFixerTest : public ::testing::Test {
   }
 
   std::string
-  fixNamespaceEndComments(llvm::StringRef Code,
+  fixNamespaceEndComments(StringRef Code,
                           const FormatStyle &Style = getLLVMStyle()) {
     return fixNamespaceEndComments(
         Code,
@@ -43,8 +43,7 @@ class NamespaceEndCommentsFixerTest : public ::testing::Test {
 
   bool isFormatted(StringRef Code, const std::vector<tooling::Range> &Ranges,
                    const FormatStyle &Style = getLLVMStyle()) const {
-    return clang::format::fixNamespaceEndComments(Style, Code, Ranges,
-                                                  "<stdin>")
+    return format::fixNamespaceEndComments(Style, Code, Ranges, "<stdin>")
         .empty();
   }
 

diff  --git a/clang/unittests/Format/ObjCPropertyAttributeOrderFixerTest.cpp 
b/clang/unittests/Format/ObjCPropertyAttributeOrderFixerTest.cpp
index 79ded66735916..9f852e4768b12 100644
--- a/clang/unittests/Format/ObjCPropertyAttributeOrderFixerTest.cpp
+++ b/clang/unittests/Format/ObjCPropertyAttributeOrderFixerTest.cpp
@@ -28,7 +28,7 @@ namespace {
 
 class ObjCPropertyAttributeOrderFixerTest : public FormatTestBase {
 protected:
-  TokenList annotate(llvm::StringRef Code,
+  TokenList annotate(StringRef Code,
                      const FormatStyle &Style = getLLVMStyle()) {
     return TestLexer(Allocator, Buffers, Style).annotate(Code);
   }

diff  --git a/clang/unittests/Format/QualifierFixerTest.cpp 
b/clang/unittests/Format/QualifierFixerTest.cpp
index 1f21fc0e0b42f..3a5f63e5de65b 100644
--- a/clang/unittests/Format/QualifierFixerTest.cpp
+++ b/clang/unittests/Format/QualifierFixerTest.cpp
@@ -28,7 +28,7 @@ namespace {
 
 class QualifierFixerTest : public FormatTestBase {
 protected:
-  TokenList annotate(llvm::StringRef Code,
+  TokenList annotate(StringRef Code,
                      const FormatStyle &Style = getLLVMStyle()) {
     return TestLexer(Allocator, Buffers, Style).annotate(Code);
   }

diff  --git a/clang/unittests/Format/SortImportsTestJS.cpp 
b/clang/unittests/Format/SortImportsTestJS.cpp
index f423cdd21d1ac..59ce62117d4a1 100644
--- a/clang/unittests/Format/SortImportsTestJS.cpp
+++ b/clang/unittests/Format/SortImportsTestJS.cpp
@@ -17,7 +17,7 @@ namespace clang {
 namespace format {
 namespace {
 
-class SortImportsTestJS : public ::testing::Test {
+class SortImportsTestJS : public testing::Test {
 protected:
   std::string sort(StringRef Code, unsigned Offset = 0, unsigned Length = 0) {
     StringRef FileName = "input.js";
@@ -33,10 +33,9 @@ class SortImportsTestJS : public ::testing::Test {
     return *Formatted;
   }
 
-  void _verifySort(const char *File, int Line, llvm::StringRef Expected,
-                   llvm::StringRef Code, unsigned Offset = 0,
-                   unsigned Length = 0) {
-    ::testing::ScopedTrace t(File, Line, ::testing::Message() << Code.str());
+  void _verifySort(const char *File, int Line, StringRef Expected,
+                   StringRef Code, unsigned Offset = 0, unsigned Length = 0) {
+    testing::ScopedTrace t(File, Line, testing::Message() << Code.str());
     std::string Result = sort(Code, Offset, Length);
     EXPECT_EQ(Expected.str(), Result) << "Expected:\n"
                                       << Expected << "\nActual:\n"

diff  --git a/clang/unittests/Format/SortImportsTestJava.cpp 
b/clang/unittests/Format/SortImportsTestJava.cpp
index 98a6826b1ff58..d577efa34f86e 100644
--- a/clang/unittests/Format/SortImportsTestJava.cpp
+++ b/clang/unittests/Format/SortImportsTestJava.cpp
@@ -7,7 +7,7 @@ namespace clang {
 namespace format {
 namespace {
 
-class SortImportsTestJava : public ::testing::Test {
+class SortImportsTestJava : public testing::Test {
 protected:
   std::vector<tooling::Range> GetCodeRange(StringRef Code) {
     return std::vector<tooling::Range>(1, tooling::Range(0, Code.size()));

diff  --git a/clang/unittests/Format/SortIncludesTest.cpp 
b/clang/unittests/Format/SortIncludesTest.cpp
index 52ba19627182b..2eeb16b4ab9f5 100644
--- a/clang/unittests/Format/SortIncludesTest.cpp
+++ b/clang/unittests/Format/SortIncludesTest.cpp
@@ -43,7 +43,7 @@ class SortIncludesTest : public test::FormatTestBase {
     return sort(Code, GetCodeRange(Code), FileName, ExpectedNumRanges);
   }
 
-  unsigned newCursor(llvm::StringRef Code, unsigned Cursor) {
+  unsigned newCursor(StringRef Code, unsigned Cursor) {
     sortIncludes(FmtStyle, Code, GetCodeRange(Code), "input.cpp", &Cursor);
     return Cursor;
   }
@@ -644,7 +644,7 @@ TEST_F(SortIncludesTest, 
SupportOptionalCaseSensitiveSorting) {
                     "#include \"A/b.h\"",
                     "a.h"));
 
-  Style.IncludeBlocks = clang::tooling::IncludeStyle::IBS_Regroup;
+  Style.IncludeBlocks = tooling::IncludeStyle::IBS_Regroup;
   Style.IncludeCategories = {
       {"^\"", 1, 0, false}, {"^<.*\\.h>$", 2, 0, false}, {"^<", 3, 0, false}};
 
@@ -694,7 +694,7 @@ TEST_F(SortIncludesTest, SupportCaseInsensitiveMatching) {
 }
 
 TEST_F(SortIncludesTest, SupportOptionalCaseSensitiveMachting) {
-  Style.IncludeBlocks = clang::tooling::IncludeStyle::IBS_Regroup;
+  Style.IncludeBlocks = tooling::IncludeStyle::IBS_Regroup;
   Style.IncludeCategories = {{"^\"", 1, 0, false},
                              {"^<.*\\.h>$", 2, 0, false},
                              {"^<Q[A-Z][^\\.]*>", 3, 0, false},

diff  --git a/clang/unittests/Format/TestLexer.h 
b/clang/unittests/Format/TestLexer.h
index 8b5949b32fc9e..294d0106dbe2c 100644
--- a/clang/unittests/Format/TestLexer.h
+++ b/clang/unittests/Format/TestLexer.h
@@ -28,7 +28,7 @@
 namespace clang {
 namespace format {
 
-typedef llvm::SmallVector<FormatToken *, 8> TokenList;
+typedef SmallVector<FormatToken *, 8> TokenList;
 
 inline std::ostream &operator<<(std::ostream &Stream, const FormatToken &Tok) {
   Stream << "(" << Tok.Tok.getName() << ", \"" << Tok.TokenText.str() << "\" , 
"
@@ -48,7 +48,7 @@ inline TokenList uneof(const TokenList &Tokens) {
   return TokenList(Tokens.begin(), std::prev(Tokens.end()));
 }
 
-inline std::string text(llvm::ArrayRef<FormatToken *> Tokens) {
+inline std::string text(ArrayRef<FormatToken *> Tokens) {
   return std::accumulate(Tokens.begin(), Tokens.end(), std::string(),
                          [](const std::string &R, FormatToken *Tok) {
                            return (R + Tok->TokenText).str();
@@ -63,13 +63,13 @@ class TestLexer : public UnwrappedLineConsumer {
       : Allocator(Allocator), Buffers(Buffers), Style(Style),
         SourceMgr("test.cpp", ""), IdentTable(getFormattingLangOpts(Style)) {}
 
-  TokenList lex(llvm::StringRef Code) {
+  TokenList lex(StringRef Code) {
     FormatTokenLexer Lex = getNewLexer(Code);
     ArrayRef<FormatToken *> Result = Lex.lex();
     return TokenList(Result.begin(), Result.end());
   }
 
-  TokenList annotate(llvm::StringRef Code) {
+  TokenList annotate(StringRef Code) {
     FormatTokenLexer Lex = getNewLexer(Code);
     auto Tokens = Lex.lex();
     UnwrappedLineParser Parser(SourceMgr.get(), Style, Lex.getKeywords(), 0,
@@ -85,7 +85,7 @@ class TestLexer : public UnwrappedLineConsumer {
     return TokenList(Tokens.begin(), Tokens.end());
   }
 
-  FormatToken *id(llvm::StringRef Code) {
+  FormatToken *id(StringRef Code) {
     auto Result = uneof(lex(Code));
     assert(Result.size() == 1U && "Code must expand to 1 token.");
     return Result[0];
@@ -100,7 +100,7 @@ class TestLexer : public UnwrappedLineConsumer {
   FormatTokenLexer getNewLexer(StringRef Code) {
     Buffers.push_back(
         llvm::MemoryBuffer::getMemBufferCopy(Code, "<scratch space>"));
-    clang::FileID FID =
+    FileID FID =
         SourceMgr.get().createFileID(Buffers.back()->getMemBufferRef());
     return FormatTokenLexer(SourceMgr.get(), FID, 0, Style, Encoding, 
Allocator,
                             IdentTable);
@@ -111,7 +111,7 @@ class TestLexer : public UnwrappedLineConsumer {
   std::vector<std::unique_ptr<llvm::MemoryBuffer>> &Buffers;
   FormatStyle Style;
   encoding::Encoding Encoding = encoding::Encoding_UTF8;
-  clang::SourceManagerForFile SourceMgr;
+  SourceManagerForFile SourceMgr;
   IdentifierTable IdentTable;
   SmallVector<UnwrappedLine, 16> UnwrappedLines;
 };

diff  --git a/clang/unittests/Format/TokenAnnotatorTest.cpp 
b/clang/unittests/Format/TokenAnnotatorTest.cpp
index aadfa6dc0165c..7528675753047 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -24,9 +24,9 @@ static bool operator==(const FormatToken &LHS,
 
 namespace {
 
-class TokenAnnotatorTest : public ::testing::Test {
+class TokenAnnotatorTest : public testing::Test {
 protected:
-  TokenList annotate(llvm::StringRef Code,
+  TokenList annotate(StringRef Code,
                      const FormatStyle &Style = getLLVMStyle()) {
     return TestLexer(Allocator, Buffers, Style).annotate(Code);
   }
@@ -2097,7 +2097,7 @@ TEST_F(TokenAnnotatorTest, 
UnderstandsAttributeMacrosOnObjCProperty) {
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsVerilogOperators) {
-  auto Annotate = [this](llvm::StringRef Code) {
+  auto Annotate = [this](StringRef Code) {
     return annotate(Code, getLLVMStyle(FormatStyle::LK_Verilog));
   };
   // Test that unary operators get labeled as such and that operators like '++'
@@ -2279,9 +2279,7 @@ TEST_F(TokenAnnotatorTest, UnderstandTableGenTokens) {
 
   TestLexer Lexer(Allocator, Buffers, Style);
   AdditionalKeywords Keywords(Lexer.IdentTable);
-  auto Annotate = [&Lexer](llvm::StringRef Code) {
-    return Lexer.annotate(Code);
-  };
+  auto Annotate = [&Lexer](StringRef Code) { return Lexer.annotate(Code); };
 
   // Additional keywords representation test.
   auto Tokens = Annotate("def foo : Bar<1>;");
@@ -2357,7 +2355,7 @@ TEST_F(TokenAnnotatorTest, UnderstandTableGenTokens) {
   Tokens = Annotate("!cond");
   EXPECT_TOKEN(Tokens[0], tok::identifier, TT_TableGenCondOperator);
 
-  auto AnnotateValue = [this, &Style](llvm::StringRef Code) {
+  auto AnnotateValue = [this, &Style](StringRef Code) {
     // Values are annotated only in specific context.
     auto Result = annotate(("def X { let V = " + Code + "; }").str(), Style);
     return decltype(Result){Result.begin() + 6, Result.end() - 3};
@@ -2649,7 +2647,7 @@ TEST_F(TokenAnnotatorTest, 
UnderstandDesignatedInitializers) {
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsJavaScript) {
-  auto Annotate = [this](llvm::StringRef Code) {
+  auto Annotate = [this](StringRef Code) {
     return annotate(Code, getLLVMStyle(FormatStyle::LK_JavaScript));
   };
 

diff  --git a/clang/unittests/Format/UsingDeclarationsSorterTest.cpp 
b/clang/unittests/Format/UsingDeclarationsSorterTest.cpp
index c0c0de7076fe6..ddcecc0208b0c 100644
--- a/clang/unittests/Format/UsingDeclarationsSorterTest.cpp
+++ b/clang/unittests/Format/UsingDeclarationsSorterTest.cpp
@@ -17,22 +17,22 @@ namespace clang {
 namespace format {
 namespace {
 
-class UsingDeclarationsSorterTest : public ::testing::Test {
+class UsingDeclarationsSorterTest : public testing::Test {
 protected:
-  std::string sortUsingDeclarations(llvm::StringRef Code,
+  std::string sortUsingDeclarations(StringRef Code,
                                     const std::vector<tooling::Range> &Ranges,
                                     const FormatStyle &Style = getLLVMStyle()) 
{
     LLVM_DEBUG(llvm::errs() << "---\n");
     LLVM_DEBUG(llvm::errs() << Code << "\n\n");
     tooling::Replacements Replaces =
-        clang::format::sortUsingDeclarations(Style, Code, Ranges, "<stdin>");
+        format::sortUsingDeclarations(Style, Code, Ranges, "<stdin>");
     auto Result = applyAllReplacements(Code, Replaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     LLVM_DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
     return *Result;
   }
 
-  std::string sortUsingDeclarations(llvm::StringRef Code,
+  std::string sortUsingDeclarations(StringRef Code,
                                     const FormatStyle &Style = getLLVMStyle()) 
{
     return sortUsingDeclarations(Code,
                                  /*Ranges=*/{1, tooling::Range(0, 
Code.size())},


        
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