[clang-tools-extra] ab2d3ce - [clang-tidy] Applied clang-tidy fixes. NFC

Alexander Kornienko via cfe-commits cfe-commits at lists.llvm.org
Thu Jan 28 16:01:30 PST 2021


Author: Alexander Kornienko
Date: 2021-01-29T01:01:19+01:00
New Revision: ab2d3ce47d6fead7fb79b3c0c7c4c6ac2b930d45

URL: https://github.com/llvm/llvm-project/commit/ab2d3ce47d6fead7fb79b3c0c7c4c6ac2b930d45
DIFF: https://github.com/llvm/llvm-project/commit/ab2d3ce47d6fead7fb79b3c0c7c4c6ac2b930d45.diff

LOG: [clang-tidy] Applied clang-tidy fixes. NFC

Applied fixes enabled by the LLVM's .clang-tidy configs. Reverted files where
fixes introduced compile errors:
  clang-tools-extra/clang-tidy/hicpp/NoAssemblerCheck.cpp
  clang-tools-extra/clang-tidy/misc/ThrowByValueCatchByReferenceCheck.cpp

$ clang-tools-extra/clang-tidy/tool/run-clang-tidy.py -fix clang-tools-extra/clang-tidy/
Enabled checks:
    llvm-else-after-return
    llvm-header-guard
    llvm-include-order
    llvm-namespace-comment
    llvm-prefer-isa-or-dyn-cast-in-conditionals
    llvm-prefer-register-over-unsigned
    llvm-qualified-auto
    llvm-twine-local
    misc-definitions-in-headers
    misc-misplaced-const
    misc-new-delete-overloads
    misc-no-recursion
    misc-non-copyable-objects
    misc-redundant-expression
    misc-static-assert
    misc-throw-by-value-catch-by-reference
    misc-unconventional-assign-operator
    misc-uniqueptr-reset-release
    misc-unused-alias-decls
    misc-unused-using-decls
    readability-identifier-naming

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D95614

Added: 
    

Modified: 
    clang-tools-extra/clang-tidy/ClangTidy.cpp
    clang-tools-extra/clang-tidy/ClangTidyOptions.cpp
    clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp
    clang-tools-extra/clang-tidy/GlobList.cpp
    clang-tools-extra/clang-tidy/abseil/DurationDivisionCheck.cpp
    clang-tools-extra/clang-tidy/abseil/DurationFactoryFloatCheck.cpp
    clang-tools-extra/clang-tidy/abseil/DurationFactoryScaleCheck.cpp
    clang-tools-extra/clang-tidy/abseil/DurationRewriter.cpp
    clang-tools-extra/clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
    clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp
    clang-tools-extra/clang-tidy/abseil/RedundantStrcatCallsCheck.cpp
    clang-tools-extra/clang-tidy/abseil/StringFindStrContainsCheck.cpp
    clang-tools-extra/clang-tidy/abseil/TimeSubtractionCheck.cpp
    clang-tools-extra/clang-tidy/altera/KernelNameRestrictionCheck.cpp
    clang-tools-extra/clang-tidy/android/AndroidTidyModule.cpp
    clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/BadSignalToKillThreadCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/CopyConstructorInitCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/IncorrectRoundingsCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/InfiniteLoopCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/LambdaFunctionNameCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/ReservedIdentifierCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/SpuriouslyWakeUpFunctionsCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/StringLiteralWithEmbeddedNulCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/SuspiciousEnumUsageCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/SuspiciousMissingCommaCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/TerminatingContinueCheck.cpp
    clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
    clang-tools-extra/clang-tidy/cert/LimitedRandomnessCheck.cpp
    clang-tools-extra/clang-tidy/cert/StrToNumCheck.cpp
    clang-tools-extra/clang-tidy/concurrency/MtUnsafeCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/NarrowingConversionsCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
    clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
    clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
    clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.cpp
    clang-tools-extra/clang-tidy/google/AvoidUnderscoreInGoogletestNameCheck.cpp
    clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
    clang-tools-extra/clang-tidy/google/FunctionNamingCheck.cpp
    clang-tools-extra/clang-tidy/hicpp/MultiwayPathsCoveredCheck.cpp
    clang-tools-extra/clang-tidy/misc/NoRecursionCheck.cpp
    clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
    clang-tools-extra/clang-tidy/misc/UnusedParametersCheck.cpp
    clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
    clang-tools-extra/clang-tidy/modernize/DeprecatedIosBaseAliasesCheck.cpp
    clang-tools-extra/clang-tidy/modernize/LoopConvertCheck.cpp
    clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp
    clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp
    clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.cpp
    clang-tools-extra/clang-tidy/modernize/ReplaceRandomShuffleCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseAutoCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseEqualsDefaultCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseNullptrCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseOverrideCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseTrailingReturnTypeCheck.cpp
    clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
    clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
    clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
    clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
    clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
    clang-tools-extra/clang-tidy/performance/FasterStringFindCheck.cpp
    clang-tools-extra/clang-tidy/performance/ImplicitConversionInLoopCheck.cpp
    clang-tools-extra/clang-tidy/performance/InefficientStringConcatenationCheck.cpp
    clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
    clang-tools-extra/clang-tidy/performance/MoveConstArgCheck.cpp
    clang-tools-extra/clang-tidy/performance/TypePromotionInMathFnCheck.cpp
    clang-tools-extra/clang-tidy/performance/UnnecessaryCopyInitialization.cpp
    clang-tools-extra/clang-tidy/plugin/ClangTidyPlugin.cpp
    clang-tools-extra/clang-tidy/portability/SIMDIntrinsicsCheck.cpp
    clang-tools-extra/clang-tidy/readability/AvoidConstParamsInDecls.cpp
    clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
    clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp
    clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
    clang-tools-extra/clang-tidy/readability/ImplicitBoolConversionCheck.cpp
    clang-tools-extra/clang-tidy/readability/MakeMemberFunctionConstCheck.cpp
    clang-tools-extra/clang-tidy/readability/MisleadingIndentationCheck.cpp
    clang-tools-extra/clang-tidy/readability/NamedParameterCheck.cpp
    clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp
    clang-tools-extra/clang-tidy/readability/RedundantDeclarationCheck.cpp
    clang-tools-extra/clang-tidy/readability/RedundantPreprocessorCheck.cpp
    clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
    clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp
    clang-tools-extra/clang-tidy/readability/SimplifySubscriptExprCheck.cpp
    clang-tools-extra/clang-tidy/readability/UppercaseLiteralSuffixCheck.cpp
    clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp
    clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
    clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.cpp
    clang-tools-extra/clang-tidy/utils/ExprSequence.cpp
    clang-tools-extra/clang-tidy/utils/IncludeSorter.cpp

Removed: 
    


################################################################################
diff  --git a/clang-tools-extra/clang-tidy/ClangTidy.cpp b/clang-tools-extra/clang-tidy/ClangTidy.cpp
index 12d2134026c4..dc523d0731d5 100644
--- a/clang-tools-extra/clang-tidy/ClangTidy.cpp
+++ b/clang-tools-extra/clang-tidy/ClangTidy.cpp
@@ -67,7 +67,7 @@ class AnalyzerDiagnosticConsumer : public ento::PathDiagnosticConsumer {
   AnalyzerDiagnosticConsumer(ClangTidyContext &Context) : Context(Context) {}
 
   void FlushDiagnosticsImpl(std::vector<const ento::PathDiagnostic *> &Diags,
-                            FilesMade *filesMade) override {
+                            FilesMade *FilesMade) override {
     for (const ento::PathDiagnostic *PD : Diags) {
       SmallString<64> CheckName(AnalyzerCheckNamePrefix);
       CheckName += PD->getCheckerName();
@@ -186,7 +186,7 @@ class ErrorReporter {
       reportNote(Note);
   }
 
-  void Finish() {
+  void finish() {
     if (ApplyFixes && TotalFixes > 0) {
       Rewriter Rewrite(SourceMgr, LangOpts);
       for (const auto &FileAndReplacements : FileReplacements) {
@@ -596,7 +596,7 @@ void handleErrors(llvm::ArrayRef<ClangTidyError> Errors,
     // Return to the initial directory to correctly resolve next Error.
     FileSystem.setCurrentWorkingDirectory(InitialWorkingDir.get());
   }
-  Reporter.Finish();
+  Reporter.finish();
   WarningsAsErrorsCount += Reporter.getWarningsAsErrorsCount();
 }
 

diff  --git a/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp b/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp
index be068aa8da4a..1e62d1c5f5ed 100644
--- a/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp
+++ b/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp
@@ -47,7 +47,7 @@ template <> struct MappingTraits<FileFilter> {
     IO.mapRequired("name", File.Name);
     IO.mapOptional("lines", File.LineRanges);
   }
-  static std::string validate(IO &io, FileFilter &File) {
+  static std::string validate(IO &Io, FileFilter &File) {
     if (File.Name.empty())
       return "No file name specified";
     for (const FileFilter::LineRange &Range : File.LineRanges) {

diff  --git a/clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp b/clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp
index 1d008c23617c..12795f0468fd 100644
--- a/clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp
+++ b/clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp
@@ -125,7 +125,7 @@ void ExpandModularHeadersPPCallbacks::handleModuleFile(
         Recorder->addNecessaryFile(IF.getFile());
       });
   // Recursively handle all transitively imported modules.
-  for (auto Import : MF->Imports)
+  for (auto *Import : MF->Imports)
     handleModuleFile(Import);
 }
 

diff  --git a/clang-tools-extra/clang-tidy/GlobList.cpp b/clang-tools-extra/clang-tidy/GlobList.cpp
index 5b70b8d8c577..43945fcdc074 100644
--- a/clang-tools-extra/clang-tidy/GlobList.cpp
+++ b/clang-tools-extra/clang-tidy/GlobList.cpp
@@ -14,7 +14,7 @@ using namespace tidy;
 
 // Returns true if GlobList starts with the negative indicator ('-'), removes it
 // from the GlobList.
-static bool ConsumeNegativeIndicator(StringRef &GlobList) {
+static bool consumeNegativeIndicator(StringRef &GlobList) {
   GlobList = GlobList.trim(" \r\n");
   if (GlobList.startswith("-")) {
     GlobList = GlobList.substr(1);
@@ -25,7 +25,7 @@ static bool ConsumeNegativeIndicator(StringRef &GlobList) {
 
 // Converts first glob from the comma-separated list of globs to Regex and
 // removes it and the trailing comma from the GlobList.
-static llvm::Regex ConsumeGlob(StringRef &GlobList) {
+static llvm::Regex consumeGlob(StringRef &GlobList) {
   StringRef UntrimmedGlob = GlobList.substr(0, GlobList.find(','));
   StringRef Glob = UntrimmedGlob.trim(' ');
   GlobList = GlobList.substr(UntrimmedGlob.size() + 1);
@@ -46,8 +46,8 @@ GlobList::GlobList(StringRef Globs) {
   Items.reserve(Globs.count(',') + 1);
   do {
     GlobListItem Item;
-    Item.IsPositive = !ConsumeNegativeIndicator(Globs);
-    Item.Regex = ConsumeGlob(Globs);
+    Item.IsPositive = !consumeNegativeIndicator(Globs);
+    Item.Regex = consumeGlob(Globs);
     Items.push_back(std::move(Item));
   } while (!Globs.empty());
 }

diff  --git a/clang-tools-extra/clang-tidy/abseil/DurationDivisionCheck.cpp b/clang-tools-extra/clang-tidy/abseil/DurationDivisionCheck.cpp
index 5ded02a2097b..0fb750c69475 100644
--- a/clang-tools-extra/clang-tidy/abseil/DurationDivisionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/DurationDivisionCheck.cpp
@@ -17,10 +17,10 @@ namespace abseil {
 
 using namespace clang::ast_matchers;
 
-void DurationDivisionCheck::registerMatchers(MatchFinder *finder) {
+void DurationDivisionCheck::registerMatchers(MatchFinder *Finder) {
   const auto DurationExpr =
       expr(hasType(cxxRecordDecl(hasName("::absl::Duration"))));
-  finder->addMatcher(
+  Finder->addMatcher(
       traverse(TK_AsIs,
                implicitCastExpr(
                    hasSourceExpression(ignoringParenCasts(
@@ -35,8 +35,8 @@ void DurationDivisionCheck::registerMatchers(MatchFinder *finder) {
       this);
 }
 
-void DurationDivisionCheck::check(const MatchFinder::MatchResult &result) {
-  const auto *OpCall = result.Nodes.getNodeAs<CXXOperatorCallExpr>("OpCall");
+void DurationDivisionCheck::check(const MatchFinder::MatchResult &Result) {
+  const auto *OpCall = Result.Nodes.getNodeAs<CXXOperatorCallExpr>("OpCall");
   diag(OpCall->getOperatorLoc(),
        "operator/ on absl::Duration objects performs integer division; "
        "did you mean to use FDivDuration()?")
@@ -47,8 +47,8 @@ void DurationDivisionCheck::check(const MatchFinder::MatchResult &result) {
              ", ")
       << FixItHint::CreateInsertion(
              Lexer::getLocForEndOfToken(
-                 result.SourceManager->getSpellingLoc(OpCall->getEndLoc()), 0,
-                 *result.SourceManager, result.Context->getLangOpts()),
+                 Result.SourceManager->getSpellingLoc(OpCall->getEndLoc()), 0,
+                 *Result.SourceManager, Result.Context->getLangOpts()),
              ")");
 }
 

diff  --git a/clang-tools-extra/clang-tidy/abseil/DurationFactoryFloatCheck.cpp b/clang-tools-extra/clang-tidy/abseil/DurationFactoryFloatCheck.cpp
index ed7e9fd0dfad..1f1dc07351ba 100644
--- a/clang-tools-extra/clang-tidy/abseil/DurationFactoryFloatCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/DurationFactoryFloatCheck.cpp
@@ -20,7 +20,7 @@ namespace tidy {
 namespace abseil {
 
 // Returns `true` if `Range` is inside a macro definition.
-static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result,
+static bool insideMacroDefinition(const MatchFinder::MatchResult &Result,
                                   SourceRange Range) {
   return !clang::Lexer::makeFileCharRange(
               clang::CharSourceRange::getCharRange(Range),
@@ -46,7 +46,7 @@ void DurationFactoryFloatCheck::check(const MatchFinder::MatchResult &Result) {
   const auto *MatchedCall = Result.Nodes.getNodeAs<CallExpr>("call");
 
   // Don't try and replace things inside of macro definitions.
-  if (InsideMacroDefinition(Result, MatchedCall->getSourceRange()))
+  if (insideMacroDefinition(Result, MatchedCall->getSourceRange()))
     return;
 
   const Expr *Arg = MatchedCall->getArg(0)->IgnoreImpCasts();

diff  --git a/clang-tools-extra/clang-tidy/abseil/DurationFactoryScaleCheck.cpp b/clang-tools-extra/clang-tidy/abseil/DurationFactoryScaleCheck.cpp
index 0e537fc3cc4e..7da75fad589b 100644
--- a/clang-tools-extra/clang-tidy/abseil/DurationFactoryScaleCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/DurationFactoryScaleCheck.cpp
@@ -35,7 +35,7 @@ getScaleForFactory(llvm::StringRef FactoryName) {
 
 // Given either an integer or float literal, return its value.
 // One and only one of `IntLit` and `FloatLit` should be provided.
-static double GetValue(const IntegerLiteral *IntLit,
+static double getValue(const IntegerLiteral *IntLit,
                        const FloatingLiteral *FloatLit) {
   if (IntLit)
     return IntLit->getValue().getLimitedValue();
@@ -48,7 +48,7 @@ static double GetValue(const IntegerLiteral *IntLit,
 // would produce a new scale.  If so, return a tuple containing the new scale
 // and a suitable Multiplier for that scale, otherwise `None`.
 static llvm::Optional<std::tuple<DurationScale, double>>
-GetNewScaleSingleStep(DurationScale OldScale, double Multiplier) {
+getNewScaleSingleStep(DurationScale OldScale, double Multiplier) {
   switch (OldScale) {
   case DurationScale::Hours:
     if (Multiplier <= 1.0 / 60.0)
@@ -94,17 +94,17 @@ GetNewScaleSingleStep(DurationScale OldScale, double Multiplier) {
 
 // Given the scale of a duration and a `Multiplier`, determine if `Multiplier`
 // would produce a new scale.  If so, return it, otherwise `None`.
-static llvm::Optional<DurationScale> GetNewScale(DurationScale OldScale,
+static llvm::Optional<DurationScale> getNewScale(DurationScale OldScale,
                                                  double Multiplier) {
   while (Multiplier != 1.0) {
-    llvm::Optional<std::tuple<DurationScale, double>> result =
-        GetNewScaleSingleStep(OldScale, Multiplier);
-    if (!result)
+    llvm::Optional<std::tuple<DurationScale, double>> Result =
+        getNewScaleSingleStep(OldScale, Multiplier);
+    if (!Result)
       break;
-    if (std::get<1>(*result) == 1.0)
-      return std::get<0>(*result);
-    Multiplier = std::get<1>(*result);
-    OldScale = std::get<0>(*result);
+    if (std::get<1>(*Result) == 1.0)
+      return std::get<0>(*Result);
+    Multiplier = std::get<1>(*Result);
+    OldScale = std::get<0>(*Result);
   }
 
   return llvm::None;
@@ -173,7 +173,7 @@ void DurationFactoryScaleCheck::check(const MatchFinder::MatchResult &Result) {
     const auto *IntLit = llvm::dyn_cast<IntegerLiteral>(MultBinOp->getLHS());
     const auto *FloatLit = llvm::dyn_cast<FloatingLiteral>(MultBinOp->getLHS());
     if (IntLit || FloatLit) {
-      NewScale = GetNewScale(Scale, GetValue(IntLit, FloatLit));
+      NewScale = getNewScale(Scale, getValue(IntLit, FloatLit));
       if (NewScale)
         Remainder = MultBinOp->getRHS();
     }
@@ -183,7 +183,7 @@ void DurationFactoryScaleCheck::check(const MatchFinder::MatchResult &Result) {
       IntLit = llvm::dyn_cast<IntegerLiteral>(MultBinOp->getRHS());
       FloatLit = llvm::dyn_cast<FloatingLiteral>(MultBinOp->getRHS());
       if (IntLit || FloatLit) {
-        NewScale = GetNewScale(Scale, GetValue(IntLit, FloatLit));
+        NewScale = getNewScale(Scale, getValue(IntLit, FloatLit));
         if (NewScale)
           Remainder = MultBinOp->getLHS();
       }
@@ -195,7 +195,7 @@ void DurationFactoryScaleCheck::check(const MatchFinder::MatchResult &Result) {
     const auto *FloatLit = llvm::dyn_cast<FloatingLiteral>(DivBinOp->getRHS());
 
     llvm::Optional<DurationScale> NewScale =
-        GetNewScale(Scale, 1.0 / FloatLit->getValueAsApproximateDouble());
+        getNewScale(Scale, 1.0 / FloatLit->getValueAsApproximateDouble());
     if (NewScale) {
       const Expr *Remainder = DivBinOp->getLHS();
 

diff  --git a/clang-tools-extra/clang-tidy/abseil/DurationRewriter.cpp b/clang-tools-extra/clang-tidy/abseil/DurationRewriter.cpp
index 39ee86b34f3f..125812f4f3a8 100644
--- a/clang-tools-extra/clang-tidy/abseil/DurationRewriter.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/DurationRewriter.cpp
@@ -138,8 +138,8 @@ llvm::StringRef getTimeFactoryForScale(DurationScale Scale) {
 }
 
 /// Returns the Time factory function name for a given `Scale`.
-llvm::StringRef getTimeInverseForScale(DurationScale scale) {
-  switch (scale) {
+llvm::StringRef getTimeInverseForScale(DurationScale Scale) {
+  switch (Scale) {
   case DurationScale::Hours:
     return "absl::ToUnixHours";
   case DurationScale::Minutes:

diff  --git a/clang-tools-extra/clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp b/clang-tools-extra/clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
index 28f970e17509..b357d80f4362 100644
--- a/clang-tools-extra/clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
@@ -30,31 +30,31 @@ void DurationUnnecessaryConversionCheck::registerMatchers(MatchFinder *Finder) {
 
     // Matcher which matches the current scale's factory with a `1` argument,
     // e.g. `absl::Seconds(1)`.
-    auto factory_matcher = ignoringElidableConstructorCall(
+    auto FactoryMatcher = ignoringElidableConstructorCall(
         callExpr(callee(functionDecl(hasName(DurationFactory))),
                  hasArgument(0, ignoringImpCasts(integerLiteral(equals(1))))));
 
     // Matcher which matches either inverse function and binds its argument,
     // e.g. `absl::ToDoubleSeconds(dur)`.
-    auto inverse_function_matcher = callExpr(
+    auto InverseFunctionMatcher = callExpr(
         callee(functionDecl(hasAnyName(FloatConversion, IntegerConversion))),
         hasArgument(0, expr().bind("arg")));
 
     // Matcher which matches a duration divided by the factory_matcher above,
     // e.g. `dur / absl::Seconds(1)`.
-    auto division_operator_matcher = cxxOperatorCallExpr(
+    auto DivisionOperatorMatcher = cxxOperatorCallExpr(
         hasOverloadedOperatorName("/"), hasArgument(0, expr().bind("arg")),
-        hasArgument(1, factory_matcher));
+        hasArgument(1, FactoryMatcher));
 
     // Matcher which matches a duration argument to `FDivDuration`,
     // e.g. `absl::FDivDuration(dur, absl::Seconds(1))`
-    auto fdiv_matcher = callExpr(
+    auto FdivMatcher = callExpr(
         callee(functionDecl(hasName("::absl::FDivDuration"))),
-        hasArgument(0, expr().bind("arg")), hasArgument(1, factory_matcher));
+        hasArgument(0, expr().bind("arg")), hasArgument(1, FactoryMatcher));
 
     // Matcher which matches a duration argument being scaled,
     // e.g. `absl::ToDoubleSeconds(dur) * 2`
-    auto scalar_matcher = ignoringImpCasts(
+    auto ScalarMatcher = ignoringImpCasts(
         binaryOperator(hasOperatorName("*"),
                        hasEitherOperand(expr(ignoringParenImpCasts(
                            callExpr(callee(functionDecl(hasAnyName(
@@ -65,9 +65,9 @@ void DurationUnnecessaryConversionCheck::registerMatchers(MatchFinder *Finder) {
 
     Finder->addMatcher(
         callExpr(callee(functionDecl(hasName(DurationFactory))),
-                 hasArgument(0, anyOf(inverse_function_matcher,
-                                      division_operator_matcher, fdiv_matcher,
-                                      scalar_matcher)))
+                 hasArgument(0, anyOf(InverseFunctionMatcher,
+                                      DivisionOperatorMatcher, FdivMatcher,
+                                      ScalarMatcher)))
             .bind("call"),
         this);
   }

diff  --git a/clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp b/clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp
index 3f93d4a2f570..4e7b09378db0 100644
--- a/clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/NoNamespaceCheck.cpp
@@ -25,10 +25,10 @@ void NoNamespaceCheck::registerMatchers(MatchFinder *Finder) {
 }
 
 void NoNamespaceCheck::check(const MatchFinder::MatchResult &Result) {
-  const auto *abslNamespaceDecl =
+  const auto *AbslNamespaceDecl =
       Result.Nodes.getNodeAs<NamespaceDecl>("abslNamespace");
 
-  diag(abslNamespaceDecl->getLocation(),
+  diag(AbslNamespaceDecl->getLocation(),
        "namespace 'absl' is reserved for implementation of the Abseil library "
        "and should not be opened in user code");
 }

diff  --git a/clang-tools-extra/clang-tidy/abseil/RedundantStrcatCallsCheck.cpp b/clang-tools-extra/clang-tidy/abseil/RedundantStrcatCallsCheck.cpp
index abcf570abc6e..15171be5de2d 100644
--- a/clang-tools-extra/clang-tidy/abseil/RedundantStrcatCallsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/RedundantStrcatCallsCheck.cpp
@@ -46,7 +46,7 @@ struct StrCatCheckResult {
   std::vector<FixItHint> Hints;
 };
 
-void RemoveCallLeaveArgs(const CallExpr* Call, StrCatCheckResult* CheckResult) {
+void removeCallLeaveArgs(const CallExpr *Call, StrCatCheckResult *CheckResult) {
   if (Call->getNumArgs() == 0)
     return;
   // Remove 'Foo('
@@ -59,9 +59,9 @@ void RemoveCallLeaveArgs(const CallExpr* Call, StrCatCheckResult* CheckResult) {
           Call->getRParenLoc(), Call->getEndLoc().getLocWithOffset(1))));
 }
 
-const clang::CallExpr* ProcessArgument(const Expr* Arg,
-                                       const MatchFinder::MatchResult& Result,
-                                       StrCatCheckResult* CheckResult) {
+const clang::CallExpr *processArgument(const Expr *Arg,
+                                       const MatchFinder::MatchResult &Result,
+                                       StrCatCheckResult *CheckResult) {
   const auto IsAlphanum = hasDeclaration(cxxMethodDecl(hasName("AlphaNum")));
   static const auto* const Strcat = new auto(hasName("::absl::StrCat"));
   const auto IsStrcat = cxxBindTemporaryExpr(
@@ -73,14 +73,14 @@ const clang::CallExpr* ProcessArgument(const Expr* Arg,
                                                      hasArgument(0, IsStrcat)),
                                     IsStrcat))),
                 *Arg->IgnoreParenImpCasts(), *Result.Context))) {
-    RemoveCallLeaveArgs(SubStrcatCall, CheckResult);
+    removeCallLeaveArgs(SubStrcatCall, CheckResult);
     return SubStrcatCall;
   }
   return nullptr;
 }
 
-StrCatCheckResult ProcessCall(const CallExpr* RootCall, bool IsAppend,
-                              const MatchFinder::MatchResult& Result) {
+StrCatCheckResult processCall(const CallExpr *RootCall, bool IsAppend,
+                              const MatchFinder::MatchResult &Result) {
   StrCatCheckResult CheckResult;
   std::deque<const CallExpr*> CallsToProcess = {RootCall};
 
@@ -94,8 +94,8 @@ StrCatCheckResult ProcessCall(const CallExpr* RootCall, bool IsAppend,
     for (const auto *Arg : CallExpr->arguments()) {
       if (StartArg-- > 0) 
       	continue;
-      if (const clang::CallExpr* Sub =
-              ProcessArgument(Arg, Result, &CheckResult)) {
+      if (const clang::CallExpr *Sub =
+              processArgument(Arg, Result, &CheckResult)) {
         CallsToProcess.push_back(Sub);
       }
     }
@@ -123,8 +123,7 @@ void RedundantStrcatCallsCheck::check(const MatchFinder::MatchResult& Result) {
     return;
   }
 
-  const StrCatCheckResult CheckResult =
-      ProcessCall(RootCall, IsAppend, Result);
+  const StrCatCheckResult CheckResult = processCall(RootCall, IsAppend, Result);
   if (CheckResult.NumCalls == 1) {
     // Just one call, so nothing to fix.
     return;

diff  --git a/clang-tools-extra/clang-tidy/abseil/StringFindStrContainsCheck.cpp b/clang-tools-extra/clang-tidy/abseil/StringFindStrContainsCheck.cpp
index 3054689c9653..f4a519c15b92 100644
--- a/clang-tools-extra/clang-tidy/abseil/StringFindStrContainsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/StringFindStrContainsCheck.cpp
@@ -62,7 +62,7 @@ makeRewriteRule(const std::vector<std::string> &StringLikeClassNames,
             hasArgument(1, cxxDefaultArgExpr())),
       onImplicitObjectArgument(expr().bind("string_being_searched")));
 
-  RewriteRule rule = applyFirst(
+  RewriteRule Rule = applyFirst(
       {makeRule(
            binaryOperator(hasOperatorName("=="),
                           hasOperands(ignoringParenImpCasts(StringNpos),
@@ -80,7 +80,7 @@ makeRewriteRule(const std::vector<std::string> &StringLikeClassNames,
             addInclude(AbseilStringsMatchHeader)},
            cat("use absl::StrContains instead "
                "of find() != npos"))});
-  return rule;
+  return Rule;
 }
 
 StringFindStrContainsCheck::StringFindStrContainsCheck(

diff  --git a/clang-tools-extra/clang-tidy/abseil/TimeSubtractionCheck.cpp b/clang-tools-extra/clang-tidy/abseil/TimeSubtractionCheck.cpp
index 92319715fbc5..58ce1f4be622 100644
--- a/clang-tools-extra/clang-tidy/abseil/TimeSubtractionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/abseil/TimeSubtractionCheck.cpp
@@ -20,7 +20,7 @@ namespace tidy {
 namespace abseil {
 
 // Returns `true` if `Range` is inside a macro definition.
-static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result,
+static bool insideMacroDefinition(const MatchFinder::MatchResult &Result,
                                   SourceRange Range) {
   return !clang::Lexer::makeFileCharRange(
               clang::CharSourceRange::getCharRange(Range),
@@ -93,7 +93,7 @@ void TimeSubtractionCheck::emitDiagnostic(const Expr *Node,
 }
 
 void TimeSubtractionCheck::registerMatchers(MatchFinder *Finder) {
-  for (auto ScaleName :
+  for (const char *ScaleName :
        {"Hours", "Minutes", "Seconds", "Millis", "Micros", "Nanos"}) {
     std::string TimeInverse = (llvm::Twine("ToUnix") + ScaleName).str();
     llvm::Optional<DurationScale> Scale = getScaleForTimeInverse(TimeInverse);
@@ -131,7 +131,7 @@ void TimeSubtractionCheck::check(const MatchFinder::MatchResult &Result) {
   const auto *BinOp = Result.Nodes.getNodeAs<BinaryOperator>("binop");
   std::string InverseName =
       Result.Nodes.getNodeAs<FunctionDecl>("func_decl")->getNameAsString();
-  if (InsideMacroDefinition(Result, BinOp->getSourceRange()))
+  if (insideMacroDefinition(Result, BinOp->getSourceRange()))
     return;
 
   llvm::Optional<DurationScale> Scale = getScaleForTimeInverse(InverseName);
@@ -140,7 +140,7 @@ void TimeSubtractionCheck::check(const MatchFinder::MatchResult &Result) {
 
   const auto *OuterCall = Result.Nodes.getNodeAs<CallExpr>("outer_call");
   if (OuterCall) {
-    if (InsideMacroDefinition(Result, OuterCall->getSourceRange()))
+    if (insideMacroDefinition(Result, OuterCall->getSourceRange()))
       return;
 
     // We're working with the first case of matcher, and need to replace the
@@ -166,7 +166,7 @@ void TimeSubtractionCheck::check(const MatchFinder::MatchResult &Result) {
                              .bind("arg"))),
                      *BinOp, *Result.Context));
     if (MaybeCallArg && MaybeCallArg->getArg(0)->IgnoreImpCasts() == BinOp &&
-        !InsideMacroDefinition(Result, MaybeCallArg->getSourceRange())) {
+        !insideMacroDefinition(Result, MaybeCallArg->getSourceRange())) {
       // Handle the case where the matched expression is inside a call which
       // converts it from the inverse to a Duration.  In this case, we replace
       // the outer with just the subtraction expression, which gives the right

diff  --git a/clang-tools-extra/clang-tidy/altera/KernelNameRestrictionCheck.cpp b/clang-tools-extra/clang-tidy/altera/KernelNameRestrictionCheck.cpp
index eb49977cbedb..f7c71cca7159 100644
--- a/clang-tools-extra/clang-tidy/altera/KernelNameRestrictionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/altera/KernelNameRestrictionCheck.cpp
@@ -39,7 +39,7 @@ class KernelNameRestrictionPPCallbacks : public PPCallbacks {
 private:
   /// Returns true if the name of the file with path FilePath is 'kernel.cl',
   /// 'verilog.cl', or 'vhdl.cl'. The file name check is case insensitive.
-  bool FileNameIsRestricted(StringRef FilePath);
+  bool fileNameIsRestricted(StringRef FilePath);
 
   struct IncludeDirective {
     SourceLocation Loc; // Location in the include directive.
@@ -68,7 +68,7 @@ void KernelNameRestrictionPPCallbacks::InclusionDirective(
   IncludeDirectives.push_back(std::move(ID));
 }
 
-bool KernelNameRestrictionPPCallbacks::FileNameIsRestricted(
+bool KernelNameRestrictionPPCallbacks::fileNameIsRestricted(
     StringRef FileName) {
   return FileName.equals_lower("kernel.cl") ||
          FileName.equals_lower("verilog.cl") ||
@@ -80,7 +80,7 @@ void KernelNameRestrictionPPCallbacks::EndOfMainFile() {
   // Check main file for restricted names.
   const FileEntry *Entry = SM.getFileEntryForID(SM.getMainFileID());
   StringRef FileName = llvm::sys::path::filename(Entry->getName());
-  if (FileNameIsRestricted(FileName))
+  if (fileNameIsRestricted(FileName))
     Check.diag(SM.getLocForStartOfFile(SM.getMainFileID()),
                "compiling '%0' may cause additional compilation errors due "
                "to the name of the kernel source file; consider renaming the "
@@ -93,7 +93,7 @@ void KernelNameRestrictionPPCallbacks::EndOfMainFile() {
   // Check included files for restricted names.
   for (const IncludeDirective &ID : IncludeDirectives) {
     StringRef FileName = llvm::sys::path::filename(ID.FileName);
-    if (FileNameIsRestricted(FileName))
+    if (fileNameIsRestricted(FileName))
       Check.diag(ID.Loc,
                  "including '%0' may cause additional compilation errors due "
                  "to the name of the kernel source file; consider renaming the "

diff  --git a/clang-tools-extra/clang-tidy/android/AndroidTidyModule.cpp b/clang-tools-extra/clang-tidy/android/AndroidTidyModule.cpp
index e97830972ce4..b24c0d992eab 100644
--- a/clang-tools-extra/clang-tidy/android/AndroidTidyModule.cpp
+++ b/clang-tools-extra/clang-tidy/android/AndroidTidyModule.cpp
@@ -20,8 +20,8 @@
 #include "CloexecInotifyInitCheck.h"
 #include "CloexecMemfdCreateCheck.h"
 #include "CloexecOpenCheck.h"
-#include "CloexecPipeCheck.h"
 #include "CloexecPipe2Check.h"
+#include "CloexecPipeCheck.h"
 #include "CloexecSocketCheck.h"
 #include "ComparisonInTempFailureRetryCheck.h"
 

diff  --git a/clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
index 3e401dac8a59..32af0ee6266d 100644
--- a/clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
@@ -280,7 +280,7 @@ void ArgumentCommentCheck::checkCallArgs(ASTContext *Ctx,
     IdentifierInfo *II = PVD->getIdentifier();
     if (!II)
       continue;
-    if (auto Template = Callee->getTemplateInstantiationPattern()) {
+    if (FunctionDecl *Template = Callee->getTemplateInstantiationPattern()) {
       // Don't warn on arguments for parameters instantiated from template
       // parameter packs. If we find more arguments than the template
       // definition has, it also means that they correspond to a parameter

diff  --git a/clang-tools-extra/clang-tidy/bugprone/BadSignalToKillThreadCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/BadSignalToKillThreadCheck.cpp
index 3833640b3de3..cef7fd5935ff 100644
--- a/clang-tools-extra/clang-tidy/bugprone/BadSignalToKillThreadCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/BadSignalToKillThreadCheck.cpp
@@ -65,8 +65,8 @@ void BadSignalToKillThreadCheck::check(const MatchFinder::MatchResult &Result) {
 }
 
 void BadSignalToKillThreadCheck::registerPPCallbacks(
-    const SourceManager &SM, Preprocessor *pp, Preprocessor *ModuleExpanderPP) {
-  PP = pp;
+    const SourceManager &SM, Preprocessor *Pp, Preprocessor *ModuleExpanderPP) {
+  PP = Pp;
 }
 
 } // namespace bugprone

diff  --git a/clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp
index 8c89350c6d07..9b449515f27d 100644
--- a/clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/BranchCloneCheck.cpp
@@ -41,12 +41,12 @@ static bool areSwitchBranchesIdentical(const SwitchBranch LHS,
   if (LHS.size() != RHS.size())
     return false;
 
-  for (size_t i = 0, Size = LHS.size(); i < Size; i++) {
+  for (size_t I = 0, Size = LHS.size(); I < Size; I++) {
     // NOTE: We strip goto labels and annotations in addition to stripping
     // the `case X:` or `default:` labels, but it is very unlikely that this
     // would casue false positives in real-world code.
-    if (!areStatementsIdentical(LHS[i]->stripLabelLikeStatements(),
-                                RHS[i]->stripLabelLikeStatements(), Context)) {
+    if (!areStatementsIdentical(LHS[I]->stripLabelLikeStatements(),
+                                RHS[I]->stripLabelLikeStatements(), Context)) {
       return false;
     }
   }
@@ -114,35 +114,35 @@ void BranchCloneCheck::check(const MatchFinder::MatchResult &Result) {
     size_t N = Branches.size();
     llvm::BitVector KnownAsClone(N);
 
-    for (size_t i = 0; i + 1 < N; i++) {
+    for (size_t I = 0; I + 1 < N; I++) {
       // We have already seen Branches[i] as a clone of an earlier branch.
-      if (KnownAsClone[i])
+      if (KnownAsClone[I])
         continue;
 
       int NumCopies = 1;
 
-      for (size_t j = i + 1; j < N; j++) {
-        if (KnownAsClone[j] ||
-            !areStatementsIdentical(Branches[i]->IgnoreContainers(),
-                                    Branches[j]->IgnoreContainers(), Context))
+      for (size_t J = I + 1; J < N; J++) {
+        if (KnownAsClone[J] ||
+            !areStatementsIdentical(Branches[I]->IgnoreContainers(),
+                                    Branches[J]->IgnoreContainers(), Context))
           continue;
 
         NumCopies++;
-        KnownAsClone[j] = true;
+        KnownAsClone[J] = true;
 
         if (NumCopies == 2) {
           // We report the first occurrence only when we find the second one.
-          diag(Branches[i]->getBeginLoc(),
+          diag(Branches[I]->getBeginLoc(),
                "repeated branch in conditional chain");
           SourceLocation End =
-              Lexer::getLocForEndOfToken(Branches[i]->getEndLoc(), 0,
+              Lexer::getLocForEndOfToken(Branches[I]->getEndLoc(), 0,
                                          *Result.SourceManager, getLangOpts());
           if (End.isValid()) {
             diag(End, "end of the original", DiagnosticIDs::Note);
           }
         }
 
-        diag(Branches[j]->getBeginLoc(), "clone %0 starts here",
+        diag(Branches[J]->getBeginLoc(), "clone %0 starts here",
              DiagnosticIDs::Note)
             << (NumCopies - 1);
       }

diff  --git a/clang-tools-extra/clang-tidy/bugprone/CopyConstructorInitCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/CopyConstructorInitCheck.cpp
index 1a4d45404397..5f0cbe0bbed0 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CopyConstructorInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/CopyConstructorInitCheck.cpp
@@ -110,8 +110,8 @@ void CopyConstructorInitCheck::check(const MatchFinder::MatchResult &Result) {
   FixItMsg += ' ';
 
   Diag << FixItHint::CreateInsertion(FixItLoc, FixItMsg);
-} // namespace misc
+}
 
-} // namespace misc
+} // namespace bugprone
 } // namespace tidy
 } // namespace clang

diff  --git a/clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.cpp
index 20b6203d8c79..aeb3db92f16e 100644
--- a/clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/ForwardingReferenceOverloadCheck.cpp
@@ -41,9 +41,9 @@ AST_MATCHER(QualType, isEnableIf) {
   }
   if (!BaseType)
     return false;
-  if (CheckTemplate(BaseType->getAs<TemplateSpecializationType>())) {
+  if (CheckTemplate(BaseType->getAs<TemplateSpecializationType>()))
     return true; // Case: enable_if_t< >.
-  } else if (const auto *Elaborated = BaseType->getAs<ElaboratedType>()) {
+  if (const auto *Elaborated = BaseType->getAs<ElaboratedType>()) {
     if (const auto *Qualifier = Elaborated->getQualifier()->getAsType()) {
       if (CheckTemplate(Qualifier->getAs<TemplateSpecializationType>())) {
         return true; // Case: enable_if< >::type.
@@ -68,7 +68,7 @@ void ForwardingReferenceOverloadCheck::registerMatchers(MatchFinder *Finder) {
                            unless(references(isConstQualified())))))
           .bind("parm-var");
 
-  DeclarationMatcher findOverload =
+  DeclarationMatcher FindOverload =
       cxxConstructorDecl(
           hasParameter(0, ForwardingRefParm),
           unless(hasAnyParameter(
@@ -78,7 +78,7 @@ void ForwardingReferenceOverloadCheck::registerMatchers(MatchFinder *Finder) {
               // No warning: enable_if as type parameter.
               hasDefaultArgument(isEnableIf())))))))
           .bind("ctor");
-  Finder->addMatcher(findOverload, this);
+  Finder->addMatcher(FindOverload, this);
 }
 
 void ForwardingReferenceOverloadCheck::check(

diff  --git a/clang-tools-extra/clang-tidy/bugprone/IncorrectRoundingsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/IncorrectRoundingsCheck.cpp
index 500210748f52..2f908e44f00c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/IncorrectRoundingsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/IncorrectRoundingsCheck.cpp
@@ -21,11 +21,11 @@ namespace bugprone {
 
 namespace {
 AST_MATCHER(FloatingLiteral, floatHalf) {
-  const auto &literal = Node.getValue();
+  const auto &Literal = Node.getValue();
   if ((&Node.getSemantics()) == &llvm::APFloat::IEEEsingle())
-    return literal.convertToFloat() == 0.5f;
+    return Literal.convertToFloat() == 0.5f;
   if ((&Node.getSemantics()) == &llvm::APFloat::IEEEdouble())
-    return literal.convertToDouble() == 0.5;
+    return Literal.convertToDouble() == 0.5;
   return false;
 }
 } // namespace

diff  --git a/clang-tools-extra/clang-tidy/bugprone/InfiniteLoopCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/InfiniteLoopCheck.cpp
index 310fbec72a50..bf1b51049c2c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/InfiniteLoopCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/InfiniteLoopCheck.cpp
@@ -7,10 +7,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "InfiniteLoopCheck.h"
+#include "../utils/Aliasing.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/Analysis/Analyses/ExprMutationAnalyzer.h"
-#include "../utils/Aliasing.h"
 
 using namespace clang::ast_matchers;
 using clang::tidy::utils::hasPtrOrReferenceInFunc;

diff  --git a/clang-tools-extra/clang-tidy/bugprone/LambdaFunctionNameCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/LambdaFunctionNameCheck.cpp
index 2b7edc1411eb..ba6f6bae6df1 100644
--- a/clang-tools-extra/clang-tidy/bugprone/LambdaFunctionNameCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/LambdaFunctionNameCheck.cpp
@@ -35,19 +35,19 @@ class MacroExpansionsWithFileAndLine : public PPCallbacks {
   void MacroExpands(const Token &MacroNameTok,
                     const MacroDefinition &MD, SourceRange Range,
                     const MacroArgs *Args) override {
-    bool has_file = false;
-    bool has_line = false;
+    bool HasFile = false;
+    bool HasLine = false;
     for (const auto& T : MD.getMacroInfo()->tokens()) {
       if (T.is(tok::identifier)) {
         StringRef IdentName = T.getIdentifierInfo()->getName();
         if (IdentName == "__FILE__") {
-          has_file = true;
+          HasFile = true;
         } else if (IdentName == "__LINE__") {
-          has_line = true;
+          HasLine = true;
         }
       }
     }
-    if (has_file && has_line) {
+    if (HasFile && HasLine) {
       SuppressMacroExpansions->insert(Range);
     }
   }

diff  --git a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
index 9a44ba2f58a5..36d83b2a3ea3 100644
--- a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
@@ -232,7 +232,7 @@ isGivenLengthEqualToSrcLength(const MatchFinder::MatchResult &Result) {
     return true;
 
   if (const auto *LengthExpr = Result.Nodes.getNodeAs<Expr>(LengthExprName))
-    if (dyn_cast<BinaryOperator>(LengthExpr->IgnoreParenImpCasts()))
+    if (isa<BinaryOperator>(LengthExpr->IgnoreParenImpCasts()))
       return false;
 
   // Check the strlen()'s argument's 'VarDecl' is equal to the source 'VarDecl'.
@@ -508,8 +508,8 @@ void NotNullTerminatedResultCheck::storeOptions(
 }
 
 void NotNullTerminatedResultCheck::registerPPCallbacks(
-    const SourceManager &SM, Preprocessor *pp, Preprocessor *ModuleExpanderPP) {
-  PP = pp;
+    const SourceManager &SM, Preprocessor *Pp, Preprocessor *ModuleExpanderPP) {
+  PP = Pp;
 }
 
 namespace {
@@ -750,7 +750,7 @@ void NotNullTerminatedResultCheck::registerMatchers(MatchFinder *Finder) {
   auto Memcpy = Match({"memcpy", 0, 1, 2, false});
 
   // errno_t memcpy_s(void *dest, size_t ds, const void *src, size_t count)
-  auto Memcpy_s = Match({"memcpy_s", 0, 2, 3, false});
+  auto MemcpyS = Match({"memcpy_s", 0, 2, 3, false});
 
   // void *memchr(const void *src, int c, size_t count)
   auto Memchr = Match({"memchr", None, 0, 2, false});
@@ -759,7 +759,7 @@ void NotNullTerminatedResultCheck::registerMatchers(MatchFinder *Finder) {
   auto Memmove = Match({"memmove", 0, 1, 2, false});
 
   // errno_t memmove_s(void *dest, size_t ds, const void *src, size_t count)
-  auto Memmove_s = Match({"memmove_s", 0, 2, 3, false});
+  auto MemmoveS = Match({"memmove_s", 0, 2, 3, false});
 
   // int strncmp(const char *str1, const char *str2, size_t count);
   auto StrncmpRHS = Match({"strncmp", None, 1, 2, true});
@@ -769,10 +769,10 @@ void NotNullTerminatedResultCheck::registerMatchers(MatchFinder *Finder) {
   auto Strxfrm = Match({"strxfrm", 0, 1, 2, false});
 
   // errno_t strerror_s(char *buffer, size_t bufferSize, int errnum);
-  auto Strerror_s = Match({"strerror_s", 0, None, 1, false});
+  auto StrerrorS = Match({"strerror_s", 0, None, 1, false});
 
-  auto AnyOfMatchers = anyOf(Memcpy, Memcpy_s, Memmove, Memmove_s, StrncmpRHS,
-                             StrncmpLHS, Strxfrm, Strerror_s);
+  auto AnyOfMatchers = anyOf(Memcpy, MemcpyS, Memmove, MemmoveS, StrncmpRHS,
+                             StrncmpLHS, Strxfrm, StrerrorS);
 
   Finder->addMatcher(callExpr(AnyOfMatchers).bind(FunctionExprName), this);
 
@@ -920,7 +920,7 @@ void NotNullTerminatedResultCheck::memcpy_sFix(
 void NotNullTerminatedResultCheck::memchrFix(
     StringRef Name, const MatchFinder::MatchResult &Result) {
   const auto *FunctionExpr = Result.Nodes.getNodeAs<CallExpr>(FunctionExprName);
-  if (const auto GivenCL = dyn_cast<CharacterLiteral>(FunctionExpr->getArg(1)))
+  if (const auto *GivenCL = dyn_cast<CharacterLiteral>(FunctionExpr->getArg(1)))
     if (GivenCL->getValue() != 0)
       return;
 

diff  --git a/clang-tools-extra/clang-tidy/bugprone/ReservedIdentifierCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/ReservedIdentifierCheck.cpp
index 47a84c225711..df2968e2e37c 100644
--- a/clang-tools-extra/clang-tidy/bugprone/ReservedIdentifierCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/ReservedIdentifierCheck.cpp
@@ -172,8 +172,8 @@ ReservedIdentifierCheck::GetMacroFailureInfo(const Token &MacroNameTok,
 RenamerClangTidyCheck::DiagInfo
 ReservedIdentifierCheck::GetDiagInfo(const NamingCheckId &ID,
                                      const NamingCheckFailure &Failure) const {
-  return DiagInfo{Message, [&](DiagnosticBuilder &diag) {
-                    diag << ID.second
+  return DiagInfo{Message, [&](DiagnosticBuilder &Diag) {
+                    Diag << ID.second
                          << getMessageSelectIndex(Failure.Info.KindName);
                   }};
 }

diff  --git a/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
index 5790e8f84cee..1123c7c77be3 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
@@ -35,10 +35,12 @@ AST_MATCHER_P2(Expr, hasSizeOfDescendant, int, Depth,
   if (const auto *CE = dyn_cast<CastExpr>(E)) {
     const auto M = hasSizeOfDescendant(Depth - 1, InnerMatcher);
     return M.matches(*CE->getSubExpr(), Finder, Builder);
-  } else if (const auto *UE = dyn_cast<UnaryOperator>(E)) {
+  }
+  if (const auto *UE = dyn_cast<UnaryOperator>(E)) {
     const auto M = hasSizeOfDescendant(Depth - 1, InnerMatcher);
     return M.matches(*UE->getSubExpr(), Finder, Builder);
-  } else if (const auto *BE = dyn_cast<BinaryOperator>(E)) {
+  }
+  if (const auto *BE = dyn_cast<BinaryOperator>(E)) {
     const auto LHS = hasSizeOfDescendant(Depth - 1, InnerMatcher);
     const auto RHS = hasSizeOfDescendant(Depth - 1, InnerMatcher);
     return LHS.matches(*BE->getLHS(), Finder, Builder) ||

diff  --git a/clang-tools-extra/clang-tidy/bugprone/SpuriouslyWakeUpFunctionsCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SpuriouslyWakeUpFunctionsCheck.cpp
index ee4681883964..1a9bea6a5fc8 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SpuriouslyWakeUpFunctionsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SpuriouslyWakeUpFunctionsCheck.cpp
@@ -18,14 +18,14 @@ namespace bugprone {
 
 void SpuriouslyWakeUpFunctionsCheck::registerMatchers(MatchFinder *Finder) {
 
-  auto hasUniqueLock = hasDescendant(declRefExpr(
+  auto HasUniqueLock = hasDescendant(declRefExpr(
       hasDeclaration(varDecl(hasType(recordDecl(classTemplateSpecializationDecl(
           hasName("::std::unique_lock"),
           hasTemplateArgument(
               0, templateArgument(refersToType(qualType(hasDeclaration(
                      cxxRecordDecl(hasName("::std::mutex"))))))))))))));
 
-  auto hasWaitDescendantCPP = hasDescendant(
+  auto HasWaitDescendantCpp = hasDescendant(
       cxxMemberCallExpr(
           anyOf(
               allOf(hasDescendant(memberExpr(hasDeclaration(functionDecl(
@@ -34,51 +34,49 @@ void SpuriouslyWakeUpFunctionsCheck::registerMatchers(MatchFinder *Finder) {
                     onImplicitObjectArgument(
                         declRefExpr(to(varDecl(hasType(references(recordDecl(
                             hasName("::std::condition_variable")))))))),
-                    hasUniqueLock),
+                    HasUniqueLock),
               allOf(hasDescendant(memberExpr(hasDeclaration(functionDecl(
                         allOf(hasName("::std::condition_variable::wait_for"),
                               parameterCountIs(2)))))),
                     onImplicitObjectArgument(
                         declRefExpr(to(varDecl(hasType(references(recordDecl(
                             hasName("::std::condition_variable")))))))),
-                    hasUniqueLock),
+                    HasUniqueLock),
               allOf(hasDescendant(memberExpr(hasDeclaration(functionDecl(
                         allOf(hasName("::std::condition_variable::wait_until"),
                               parameterCountIs(2)))))),
                     onImplicitObjectArgument(
                         declRefExpr(to(varDecl(hasType(references(recordDecl(
                             hasName("::std::condition_variable")))))))),
-                    hasUniqueLock)
+                    HasUniqueLock)
 
                   ))
           .bind("wait"));
 
-  auto hasWaitDescendantC = hasDescendant(
+  auto HasWaitDescendantC = hasDescendant(
       callExpr(callee(functionDecl(hasAnyName("cnd_wait", "cnd_timedwait"))))
           .bind("wait"));
   if (getLangOpts().CPlusPlus) {
     // Check for `CON54-CPP`
     Finder->addMatcher(
         ifStmt(
-
-            allOf(hasWaitDescendantCPP,
-                  unless(anyOf(hasDescendant(ifStmt(hasWaitDescendantCPP)),
-                               hasDescendant(whileStmt(hasWaitDescendantCPP)),
-                               hasDescendant(forStmt(hasWaitDescendantCPP)),
-                               hasDescendant(doStmt(hasWaitDescendantCPP)))))
+            allOf(HasWaitDescendantCpp,
+                  unless(anyOf(hasDescendant(ifStmt(HasWaitDescendantCpp)),
+                               hasDescendant(whileStmt(HasWaitDescendantCpp)),
+                               hasDescendant(forStmt(HasWaitDescendantCpp)),
+                               hasDescendant(doStmt(HasWaitDescendantCpp)))))
 
                 ),
         this);
   } else {
     // Check for `CON36-C`
     Finder->addMatcher(
-
         ifStmt(
-            allOf(hasWaitDescendantC,
-                  unless(anyOf(hasDescendant(ifStmt(hasWaitDescendantC)),
-                               hasDescendant(whileStmt(hasWaitDescendantC)),
-                               hasDescendant(forStmt(hasWaitDescendantC)),
-                               hasDescendant(doStmt(hasWaitDescendantC)),
+            allOf(HasWaitDescendantC,
+                  unless(anyOf(hasDescendant(ifStmt(HasWaitDescendantC)),
+                               hasDescendant(whileStmt(HasWaitDescendantC)),
+                               hasDescendant(forStmt(HasWaitDescendantC)),
+                               hasDescendant(doStmt(HasWaitDescendantC)),
                                hasParent(whileStmt()),
                                hasParent(compoundStmt(hasParent(whileStmt()))),
                                hasParent(forStmt()),

diff  --git a/clang-tools-extra/clang-tidy/bugprone/StringLiteralWithEmbeddedNulCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/StringLiteralWithEmbeddedNulCheck.cpp
index b533db760d5e..080d4ab67d64 100644
--- a/clang-tools-extra/clang-tidy/bugprone/StringLiteralWithEmbeddedNulCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/StringLiteralWithEmbeddedNulCheck.cpp
@@ -18,8 +18,8 @@ namespace bugprone {
 
 namespace {
 AST_MATCHER(StringLiteral, containsNul) {
-  for (size_t i = 0; i < Node.getLength(); ++i)
-    if (Node.getCodeUnit(i) == '\0')
+  for (size_t I = 0; I < Node.getLength(); ++I)
+    if (Node.getCodeUnit(I) == '\0')
       return true;
   return false;
 }

diff  --git a/clang-tools-extra/clang-tidy/bugprone/SuspiciousEnumUsageCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SuspiciousEnumUsageCheck.cpp
index cc59601066ed..3faa28c0158a 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SuspiciousEnumUsageCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SuspiciousEnumUsageCheck.cpp
@@ -117,14 +117,14 @@ void SuspiciousEnumUsageCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
 }
 
 void SuspiciousEnumUsageCheck::registerMatchers(MatchFinder *Finder) {
-  const auto enumExpr = [](StringRef RefName, StringRef DeclName) {
+  const auto EnumExpr = [](StringRef RefName, StringRef DeclName) {
     return expr(ignoringImpCasts(expr().bind(RefName)),
                 ignoringImpCasts(hasType(enumDecl().bind(DeclName))));
   };
 
   Finder->addMatcher(
-      binaryOperator(hasOperatorName("|"), hasLHS(enumExpr("", "enumDecl")),
-                     hasRHS(expr(enumExpr("", "otherEnumDecl"),
+      binaryOperator(hasOperatorName("|"), hasLHS(EnumExpr("", "enumDecl")),
+                     hasRHS(expr(EnumExpr("", "otherEnumDecl"),
                                  ignoringImpCasts(hasType(enumDecl(
                                      unless(equalsBoundNode("enumDecl"))))))))
           .bind("
diff EnumOp"),
@@ -132,8 +132,8 @@ void SuspiciousEnumUsageCheck::registerMatchers(MatchFinder *Finder) {
 
   Finder->addMatcher(
       binaryOperator(hasAnyOperatorName("+", "|"),
-                     hasLHS(enumExpr("lhsExpr", "enumDecl")),
-                     hasRHS(expr(enumExpr("rhsExpr", ""),
+                     hasLHS(EnumExpr("lhsExpr", "enumDecl")),
+                     hasRHS(expr(EnumExpr("rhsExpr", ""),
                                  ignoringImpCasts(hasType(
                                      enumDecl(equalsBoundNode("enumDecl"))))))),
       this);
@@ -141,12 +141,12 @@ void SuspiciousEnumUsageCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(
       binaryOperator(
           hasAnyOperatorName("+", "|"),
-          hasOperands(expr(hasType(isInteger()), unless(enumExpr("", ""))),
-                      enumExpr("enumExpr", "enumDecl"))),
+          hasOperands(expr(hasType(isInteger()), unless(EnumExpr("", ""))),
+                      EnumExpr("enumExpr", "enumDecl"))),
       this);
 
   Finder->addMatcher(binaryOperator(hasAnyOperatorName("|=", "+="),
-                                    hasRHS(enumExpr("enumExpr", "enumDecl"))),
+                                    hasRHS(EnumExpr("enumExpr", "enumDecl"))),
                      this);
 }
 

diff  --git a/clang-tools-extra/clang-tidy/bugprone/SuspiciousMissingCommaCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SuspiciousMissingCommaCheck.cpp
index 8fd1abe03646..092809eaa906 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SuspiciousMissingCommaCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SuspiciousMissingCommaCheck.cpp
@@ -108,8 +108,8 @@ void SuspiciousMissingCommaCheck::check(
 
   // Count the number of occurrence of concatenated string literal.
   unsigned int Count = 0;
-  for (unsigned int i = 0; i < Size; ++i) {
-    const Expr *Child = InitializerList->getInit(i)->IgnoreImpCasts();
+  for (unsigned int I = 0; I < Size; ++I) {
+    const Expr *Child = InitializerList->getInit(I)->IgnoreImpCasts();
     if (const auto *Literal = dyn_cast<StringLiteral>(Child)) {
       if (Literal->getNumConcatenated() > 1)
         ++Count;

diff  --git a/clang-tools-extra/clang-tidy/bugprone/TerminatingContinueCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/TerminatingContinueCheck.cpp
index beeeb2c8751e..43402a221218 100644
--- a/clang-tools-extra/clang-tidy/bugprone/TerminatingContinueCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/TerminatingContinueCheck.cpp
@@ -19,7 +19,7 @@ namespace tidy {
 namespace bugprone {
 
 void TerminatingContinueCheck::registerMatchers(MatchFinder *Finder) {
-  const auto doWithFalse =
+  const auto DoWithFalse =
       doStmt(hasCondition(ignoringImpCasts(
                  anyOf(cxxBoolLiteral(equals(false)), integerLiteral(equals(0)),
                        cxxNullPtrLiteralExpr(), gnuNullExpr()))),
@@ -29,7 +29,7 @@ void TerminatingContinueCheck::registerMatchers(MatchFinder *Finder) {
       continueStmt(hasAncestor(stmt(anyOf(forStmt(), whileStmt(),
                                           cxxForRangeStmt(), doStmt()))
                                    .bind("closestLoop")),
-                   hasAncestor(doWithFalse))
+                   hasAncestor(DoWithFalse))
           .bind("continue"),
       this);
 }

diff  --git a/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
index 9d08dbe1ead7..6c8a9742c9a5 100644
--- a/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/UseAfterMoveCheck.cpp
@@ -256,7 +256,7 @@ void UseAfterMoveFinder::getDeclRefs(
     if (!S)
       continue;
 
-    auto addDeclRefs = [this, Block,
+    auto AddDeclRefs = [this, Block,
                         DeclRefs](const ArrayRef<BoundNodes> Matches) {
       for (const auto &Match : Matches) {
         const auto *DeclRef = Match.getNodeAs<DeclRefExpr>("declref");
@@ -275,9 +275,9 @@ void UseAfterMoveFinder::getDeclRefs(
                                       unless(inDecltypeOrTemplateArg()))
                               .bind("declref");
 
-    addDeclRefs(match(traverse(TK_AsIs, findAll(DeclRefMatcher)), *S->getStmt(),
+    AddDeclRefs(match(traverse(TK_AsIs, findAll(DeclRefMatcher)), *S->getStmt(),
                       *Context));
-    addDeclRefs(match(findAll(cxxOperatorCallExpr(
+    AddDeclRefs(match(findAll(cxxOperatorCallExpr(
                                   hasAnyOverloadedOperatorName("*", "->", "[]"),
                                   hasArgument(0, DeclRefMatcher))
                                   .bind("operator")),
@@ -448,9 +448,9 @@ void UseAfterMoveCheck::check(const MatchFinder::MatchResult &Result) {
   if (!Arg->getDecl()->getDeclContext()->isFunctionOrMethod())
     return;
 
-  UseAfterMoveFinder finder(Result.Context);
+  UseAfterMoveFinder Finder(Result.Context);
   UseAfterMove Use;
-  if (finder.find(FunctionBody, MovingCall, Arg->getDecl(), &Use))
+  if (Finder.find(FunctionBody, MovingCall, Arg->getDecl(), &Use))
     emitDiagnostic(MovingCall, Arg, Use, this, Result.Context);
 }
 

diff  --git a/clang-tools-extra/clang-tidy/cert/LimitedRandomnessCheck.cpp b/clang-tools-extra/clang-tidy/cert/LimitedRandomnessCheck.cpp
index 847f05e7d988..9733a4e7c1f5 100644
--- a/clang-tools-extra/clang-tidy/cert/LimitedRandomnessCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cert/LimitedRandomnessCheck.cpp
@@ -24,12 +24,12 @@ void LimitedRandomnessCheck::registerMatchers(MatchFinder *Finder) {
 }
 
 void LimitedRandomnessCheck::check(const MatchFinder::MatchResult &Result) {
-  std::string msg = "";
+  std::string Msg = "";
   if (getLangOpts().CPlusPlus)
-    msg = "; use C++11 random library instead";
+    Msg = "; use C++11 random library instead";
 
   const auto *MatchedDecl = Result.Nodes.getNodeAs<CallExpr>("randomGenerator");
-  diag(MatchedDecl->getBeginLoc(), "rand() has limited randomness" + msg);
+  diag(MatchedDecl->getBeginLoc(), "rand() has limited randomness" + Msg);
 }
 
 } // namespace cert

diff  --git a/clang-tools-extra/clang-tidy/cert/StrToNumCheck.cpp b/clang-tools-extra/clang-tidy/cert/StrToNumCheck.cpp
index 9d26060c51a5..c7abbe180f60 100644
--- a/clang-tools-extra/clang-tidy/cert/StrToNumCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cert/StrToNumCheck.cpp
@@ -8,8 +8,8 @@
 
 #include "StrToNumCheck.h"
 #include "clang/AST/ASTContext.h"
-#include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/AST/FormatString.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "llvm/ADT/StringSwitch.h"
 #include <cassert>
 
@@ -48,7 +48,7 @@ enum class ConversionKind {
   ToLongDouble
 };
 
-ConversionKind ClassifyConversionFunc(const FunctionDecl *FD) {
+ConversionKind classifyConversionFunc(const FunctionDecl *FD) {
   return llvm::StringSwitch<ConversionKind>(FD->getName())
       .Cases("atoi", "atol", ConversionKind::ToInt)
       .Case("atoll", ConversionKind::ToLongInt)
@@ -56,7 +56,7 @@ ConversionKind ClassifyConversionFunc(const FunctionDecl *FD) {
       .Default(ConversionKind::None);
 }
 
-ConversionKind ClassifyFormatString(StringRef Fmt, const LangOptions &LO,
+ConversionKind classifyFormatString(StringRef Fmt, const LangOptions &LO,
                                     const TargetInfo &TI) {
   // Scan the format string for the first problematic format specifier, then
   // report that as the conversion type. This will miss additional conversion
@@ -66,8 +66,8 @@ ConversionKind ClassifyFormatString(StringRef Fmt, const LangOptions &LO,
     ConversionKind CK;
 
     bool HandleScanfSpecifier(const analyze_scanf::ScanfSpecifier &FS,
-                              const char *startSpecifier,
-                              unsigned specifierLen) override {
+                              const char *StartSpecifier,
+                              unsigned SpecifierLen) override {
       // If we just consume the argument without assignment, we don't care
       // about it having conversion errors.
       if (!FS.consumesDataArgument())
@@ -130,7 +130,7 @@ ConversionKind ClassifyFormatString(StringRef Fmt, const LangOptions &LO,
   return H.get();
 }
 
-StringRef ClassifyConversionType(ConversionKind K) {
+StringRef classifyConversionType(ConversionKind K) {
   switch (K) {
   case ConversionKind::None:
     llvm_unreachable("Unexpected conversion kind");
@@ -150,7 +150,7 @@ StringRef ClassifyConversionType(ConversionKind K) {
   llvm_unreachable("Unknown conversion kind");
 }
 
-StringRef ClassifyReplacement(ConversionKind K) {
+StringRef classifyReplacement(ConversionKind K) {
   switch (K) {
   case ConversionKind::None:
     llvm_unreachable("Unexpected conversion kind");
@@ -186,7 +186,7 @@ void StrToNumCheck::check(const MatchFinder::MatchResult &Result) {
           Result.Nodes.getNodeAs<FunctionDecl>("converter")) {
     // Converter functions are always incorrect to use.
     FuncDecl = ConverterFunc;
-    Conversion = ClassifyConversionFunc(ConverterFunc);
+    Conversion = classifyConversionFunc(ConverterFunc);
   } else if (const auto *FFD =
                  Result.Nodes.getNodeAs<FunctionDecl>("formatted")) {
     StringRef FmtStr;
@@ -213,7 +213,7 @@ void StrToNumCheck::check(const MatchFinder::MatchResult &Result) {
 
     // Formatted input functions need further checking of the format string to
     // determine whether a problematic conversion may be happening.
-    Conversion = ClassifyFormatString(FmtStr, getLangOpts(),
+    Conversion = classifyFormatString(FmtStr, getLangOpts(),
                                       Result.Context->getTargetInfo());
     if (Conversion != ConversionKind::None)
       FuncDecl = FFD;
@@ -225,8 +225,8 @@ void StrToNumCheck::check(const MatchFinder::MatchResult &Result) {
   diag(Call->getExprLoc(),
        "%0 used to convert a string to %1, but function will not report "
        "conversion errors; consider using '%2' instead")
-      << FuncDecl << ClassifyConversionType(Conversion)
-      << ClassifyReplacement(Conversion);
+      << FuncDecl << classifyConversionType(Conversion)
+      << classifyReplacement(Conversion);
 }
 
 } // namespace cert

diff  --git a/clang-tools-extra/clang-tidy/concurrency/MtUnsafeCheck.cpp b/clang-tools-extra/clang-tidy/concurrency/MtUnsafeCheck.cpp
index bc9f7403b6e9..57c2c9c0a064 100644
--- a/clang-tools-extra/clang-tidy/concurrency/MtUnsafeCheck.cpp
+++ b/clang-tools-extra/clang-tidy/concurrency/MtUnsafeCheck.cpp
@@ -277,8 +277,8 @@ template <> struct OptionEnumMapping<concurrency::MtUnsafeCheck::FunctionSet> {
 namespace concurrency {
 
 static ast_matchers::internal::Matcher<clang::NamedDecl>
-hasAnyMtUnsafeNames(MtUnsafeCheck::FunctionSet libc) {
-  switch (libc) {
+hasAnyMtUnsafeNames(MtUnsafeCheck::FunctionSet Libc) {
+  switch (Libc) {
   case MtUnsafeCheck::FunctionSet::Posix:
     return hasAnyName(PosixFunctions);
   case MtUnsafeCheck::FunctionSet::Glibc:

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
index eb21bb44f63d..4f56df0b4ff7 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
@@ -22,8 +22,8 @@ namespace cppcoreguidelines {
 namespace {
 
 bool isCapsOnly(StringRef Name) {
-  return std::all_of(Name.begin(), Name.end(), [](const char c) {
-    if (std::isupper(c) || std::isdigit(c) || c == '_')
+  return std::all_of(Name.begin(), Name.end(), [](const char C) {
+    if (std::isupper(C) || std::isdigit(C) || C == '_')
       return true;
     return false;
   });

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/NarrowingConversionsCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/NarrowingConversionsCheck.cpp
index 6819d6a4174f..86371fd67c53 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/NarrowingConversionsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/NarrowingConversionsCheck.cpp
@@ -111,12 +111,12 @@ static bool getFloatingConstantExprValue(const ASTContext &Context,
 namespace {
 
 struct IntegerRange {
-  bool Contains(const IntegerRange &From) const {
+  bool contains(const IntegerRange &From) const {
     return llvm::APSInt::compareValues(Lower, From.Lower) <= 0 &&
            llvm::APSInt::compareValues(Upper, From.Upper) >= 0;
   }
 
-  bool Contains(const llvm::APSInt &Value) const {
+  bool contains(const llvm::APSInt &Value) const {
     return llvm::APSInt::compareValues(Lower, Value) <= 0 &&
            llvm::APSInt::compareValues(Upper, Value) >= 0;
   }
@@ -160,14 +160,14 @@ static bool isWideEnoughToHold(const ASTContext &Context,
                                const BuiltinType &ToType) {
   IntegerRange FromIntegerRange = createFromType(Context, FromType);
   IntegerRange ToIntegerRange = createFromType(Context, ToType);
-  return ToIntegerRange.Contains(FromIntegerRange);
+  return ToIntegerRange.contains(FromIntegerRange);
 }
 
 static bool isWideEnoughToHold(const ASTContext &Context,
                                const llvm::APSInt &IntegerConstant,
                                const BuiltinType &ToType) {
   IntegerRange ToIntegerRange = createFromType(Context, ToType);
-  return ToIntegerRange.Contains(IntegerConstant);
+  return ToIntegerRange.contains(IntegerConstant);
 }
 
 static llvm::SmallString<64> getValueAsString(const llvm::APSInt &Value,

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
index 6873e23e7dd1..f172097863b2 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeCstyleCastCheck.cpp
@@ -66,7 +66,7 @@ void ProTypeCstyleCastCheck::check(const MatchFinder::MatchResult &Result) {
               MatchedCast->getRParenLoc().getLocWithOffset(-1)),
           *Result.SourceManager, getLangOpts());
 
-      auto diag_builder = diag(
+      auto DiagBuilder = diag(
           MatchedCast->getBeginLoc(),
           "do not use C-style cast to downcast from a base to a derived class; "
           "use dynamic_cast instead");
@@ -76,14 +76,14 @@ void ProTypeCstyleCastCheck::check(const MatchFinder::MatchResult &Result) {
       std::string CastText = ("dynamic_cast<" + DestTypeString + ">").str();
       if (!isa<ParenExpr>(SubExpr)) {
         CastText.push_back('(');
-        diag_builder << FixItHint::CreateInsertion(
+        DiagBuilder << FixItHint::CreateInsertion(
             Lexer::getLocForEndOfToken(SubExpr->getEndLoc(), 0,
                                        *Result.SourceManager, getLangOpts()),
             ")");
       }
       auto ParenRange = CharSourceRange::getTokenRange(
           MatchedCast->getLParenLoc(), MatchedCast->getRParenLoc());
-      diag_builder << FixItHint::CreateReplacement(ParenRange, CastText);
+      DiagBuilder << FixItHint::CreateReplacement(ParenRange, CastText);
     } else {
       diag(
           MatchedCast->getBeginLoc(),

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
index 67856be843e7..6b40e525f7dd 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp
@@ -140,17 +140,17 @@ struct IntializerInsertion {
     assert(!Initializers.empty() && "No initializers to insert");
     std::string Code;
     llvm::raw_string_ostream Stream(Code);
-    std::string joined =
+    std::string Joined =
         llvm::join(Initializers.begin(), Initializers.end(), "(), ");
     switch (Placement) {
     case InitializerPlacement::New:
-      Stream << " : " << joined << "()";
+      Stream << " : " << Joined << "()";
       break;
     case InitializerPlacement::Before:
-      Stream << " " << joined << "(),";
+      Stream << " " << Joined << "(),";
       break;
     case InitializerPlacement::After:
-      Stream << ", " << joined << "()";
+      Stream << ", " << Joined << "()";
       break;
     }
     return Stream.str();

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
index f6aeb8321337..ec0e87ae22c0 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeVarargCheck.cpp
@@ -17,7 +17,7 @@ namespace clang {
 namespace tidy {
 namespace cppcoreguidelines {
 
-const internal::VariadicDynCastAllOfMatcher<Stmt, VAArgExpr> vAArgExpr;
+const internal::VariadicDynCastAllOfMatcher<Stmt, VAArgExpr> VAArgExpr;
 
 static constexpr StringRef AllowedVariadics[] = {
     // clang-format off
@@ -71,7 +71,7 @@ AST_MATCHER_P(AdjustedType, hasOriginalType,
 } // namespace
 
 void ProTypeVarargCheck::registerMatchers(MatchFinder *Finder) {
-  Finder->addMatcher(vAArgExpr().bind("va_use"), this);
+  Finder->addMatcher(VAArgExpr().bind("va_use"), this);
 
   Finder->addMatcher(
       callExpr(callee(functionDecl(isVariadic(),

diff  --git a/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp b/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
index 9c16436a273e..c4684d41f78f 100644
--- a/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/cppcoreguidelines/SpecialMemberFunctionsCheck.cpp
@@ -90,8 +90,8 @@ join(ArrayRef<SpecialMemberFunctionsCheck::SpecialMemberFunctionKind> SMFS,
 
   Stream << toString(SMFS[0]);
   size_t LastIndex = SMFS.size() - 1;
-  for (size_t i = 1; i < LastIndex; ++i) {
-    Stream << ", " << toString(SMFS[i]);
+  for (size_t I = 1; I < LastIndex; ++I) {
+    Stream << ", " << toString(SMFS[I]);
   }
   if (LastIndex != 0) {
     Stream << AndOr << toString(SMFS[LastIndex]);
@@ -107,11 +107,11 @@ void SpecialMemberFunctionsCheck::check(
 
   ClassDefId ID(MatchedDecl->getLocation(), std::string(MatchedDecl->getName()));
 
-  auto StoreMember = [this, &ID](SpecialMemberFunctionData data) {
+  auto StoreMember = [this, &ID](SpecialMemberFunctionData Data) {
     llvm::SmallVectorImpl<SpecialMemberFunctionData> &Members =
         ClassWithSpecialMembers[ID];
-    if (!llvm::is_contained(Members, data))
-      Members.push_back(std::move(data));
+    if (!llvm::is_contained(Members, Data))
+      Members.push_back(std::move(Data));
   };
 
   if (const auto *Dtor = Result.Nodes.getNodeAs<CXXMethodDecl>("dtor")) {
@@ -146,14 +146,14 @@ void SpecialMemberFunctionsCheck::checkForMissingMembers(
   llvm::SmallVector<SpecialMemberFunctionKind, 5> MissingMembers;
 
   auto HasMember = [&](SpecialMemberFunctionKind Kind) {
-    return llvm::any_of(DefinedMembers, [Kind](const auto &data) {
-      return data.FunctionKind == Kind;
+    return llvm::any_of(DefinedMembers, [Kind](const auto &Data) {
+      return Data.FunctionKind == Kind;
     });
   };
 
   auto IsDeleted = [&](SpecialMemberFunctionKind Kind) {
-    return llvm::any_of(DefinedMembers, [Kind](const auto &data) {
-      return data.FunctionKind == Kind && data.IsDeleted;
+    return llvm::any_of(DefinedMembers, [Kind](const auto &Data) {
+      return Data.FunctionKind == Kind && Data.IsDeleted;
     });
   };
 
@@ -197,7 +197,7 @@ void SpecialMemberFunctionsCheck::checkForMissingMembers(
   if (!MissingMembers.empty()) {
     llvm::SmallVector<SpecialMemberFunctionKind, 5> DefinedMemberKinds;
     llvm::transform(DefinedMembers, std::back_inserter(DefinedMemberKinds),
-                    [](const auto &data) { return data.FunctionKind; });
+                    [](const auto &Data) { return Data.FunctionKind; });
     diag(ID.first, "class '%0' defines %1 but does not define %2")
         << ID.second << cppcoreguidelines::join(DefinedMemberKinds, " and ")
         << cppcoreguidelines::join(MissingMembers, " or ");

diff  --git a/clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp b/clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
index 76b8ac02990e..ae3222a2bd1a 100644
--- a/clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
+++ b/clang-tools-extra/clang-tidy/fuchsia/MultipleInheritanceCheck.cpp
@@ -28,23 +28,23 @@ AST_MATCHER(CXXRecordDecl, hasBases) {
 // Adds a node (by name) to the interface map, if it was not present in the map
 // previously.
 void MultipleInheritanceCheck::addNodeToInterfaceMap(const CXXRecordDecl *Node,
-                                                     bool isInterface) {
+                                                     bool IsInterface) {
   assert(Node->getIdentifier());
   StringRef Name = Node->getIdentifier()->getName();
-  InterfaceMap.insert(std::make_pair(Name, isInterface));
+  InterfaceMap.insert(std::make_pair(Name, IsInterface));
 }
 
 // Returns "true" if the boolean "isInterface" has been set to the
 // interface status of the current Node. Return "false" if the
 // interface status for the current node is not yet known.
 bool MultipleInheritanceCheck::getInterfaceStatus(const CXXRecordDecl *Node,
-                                                  bool &isInterface) const {
+                                                  bool &IsInterface) const {
   assert(Node->getIdentifier());
   StringRef Name = Node->getIdentifier()->getName();
   llvm::StringMapConstIterator<bool> Pair = InterfaceMap.find(Name);
   if (Pair == InterfaceMap.end())
     return false;
-  isInterface = Pair->second;
+  IsInterface = Pair->second;
   return true;
 }
 

diff  --git a/clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.cpp b/clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.cpp
index 3125889d1918..a32603dc2cb0 100644
--- a/clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.cpp
@@ -67,7 +67,7 @@ void AvoidCStyleCastsCheck::check(const MatchFinder::MatchResult &Result) {
   if (CastExpr->getCastKind() == CK_ToVoid)
     return;
 
-  auto isFunction = [](QualType T) {
+  auto IsFunction = [](QualType T) {
     T = T.getCanonicalType().getNonReferenceType();
     return T->isFunctionType() || T->isFunctionPointerType() ||
            T->isMemberFunctionPointerType();
@@ -84,7 +84,7 @@ void AvoidCStyleCastsCheck::check(const MatchFinder::MatchResult &Result) {
       CastExpr->getLParenLoc(), CastExpr->getSubExprAsWritten()->getBeginLoc());
 
   bool FnToFnCast =
-      isFunction(SourceTypeAsWritten) && isFunction(DestTypeAsWritten);
+      IsFunction(SourceTypeAsWritten) && IsFunction(DestTypeAsWritten);
 
   const bool ConstructorCast = !CastExpr->getTypeAsWritten().hasQualifiers() &&
       DestTypeAsWritten->isRecordType() &&

diff  --git a/clang-tools-extra/clang-tidy/google/AvoidUnderscoreInGoogletestNameCheck.cpp b/clang-tools-extra/clang-tidy/google/AvoidUnderscoreInGoogletestNameCheck.cpp
index 3a5aaa1e1832..783db8c0131b 100644
--- a/clang-tools-extra/clang-tidy/google/AvoidUnderscoreInGoogletestNameCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/AvoidUnderscoreInGoogletestNameCheck.cpp
@@ -21,7 +21,7 @@ namespace tidy {
 namespace google {
 namespace readability {
 
-constexpr llvm::StringLiteral kDisabledTestPrefix = "DISABLED_";
+constexpr llvm::StringLiteral KDisabledTestPrefix = "DISABLED_";
 
 // Determines whether the macro is a Googletest test macro.
 static bool isGoogletestTestMacro(StringRef MacroName) {
@@ -63,7 +63,7 @@ class AvoidUnderscoreInGoogletestNameCallback : public PPCallbacks {
 
     std::string TestNameMaybeDisabled = PP->getSpelling(*TestNameToken);
     StringRef TestName = TestNameMaybeDisabled;
-    TestName.consume_front(kDisabledTestPrefix);
+    TestName.consume_front(KDisabledTestPrefix);
     if (TestName.contains('_'))
       Check->diag(TestNameToken->getLocation(),
                   "avoid using \"_\" in test name \"%0\" according to "

diff  --git a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
index 80fc139e4b9c..59f2dfb50d6b 100644
--- a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
@@ -35,7 +35,7 @@ void ExplicitConstructorCheck::registerMatchers(MatchFinder *Finder) {
 
 // Looks for the token matching the predicate and returns the range of the found
 // token including trailing whitespace.
-static SourceRange FindToken(const SourceManager &Sources,
+static SourceRange findToken(const SourceManager &Sources,
                              const LangOptions &LangOpts,
                              SourceLocation StartLoc, SourceLocation EndLoc,
                              bool (*Pred)(const Token &)) {
@@ -103,17 +103,17 @@ void ExplicitConstructorCheck::check(const MatchFinder::MatchResult &Result) {
       Ctor->getMinRequiredArguments() > 1)
     return;
 
-  bool takesInitializerList = isStdInitializerList(
+  bool TakesInitializerList = isStdInitializerList(
       Ctor->getParamDecl(0)->getType().getNonReferenceType());
   if (Ctor->isExplicit() &&
-      (Ctor->isCopyOrMoveConstructor() || takesInitializerList)) {
-    auto isKWExplicit = [](const Token &Tok) {
+      (Ctor->isCopyOrMoveConstructor() || TakesInitializerList)) {
+    auto IsKwExplicit = [](const Token &Tok) {
       return Tok.is(tok::raw_identifier) &&
              Tok.getRawIdentifier() == "explicit";
     };
     SourceRange ExplicitTokenRange =
-        FindToken(*Result.SourceManager, getLangOpts(),
-                  Ctor->getOuterLocStart(), Ctor->getEndLoc(), isKWExplicit);
+        findToken(*Result.SourceManager, getLangOpts(),
+                  Ctor->getOuterLocStart(), Ctor->getEndLoc(), IsKwExplicit);
     StringRef ConstructorDescription;
     if (Ctor->isMoveConstructor())
       ConstructorDescription = "move";
@@ -133,7 +133,7 @@ void ExplicitConstructorCheck::check(const MatchFinder::MatchResult &Result) {
   }
 
   if (Ctor->isExplicit() || Ctor->isCopyOrMoveConstructor() ||
-      takesInitializerList)
+      TakesInitializerList)
     return;
 
   bool SingleArgument =

diff  --git a/clang-tools-extra/clang-tidy/google/FunctionNamingCheck.cpp b/clang-tools-extra/clang-tidy/google/FunctionNamingCheck.cpp
index f29d650bf5fc..cedc3850200f 100644
--- a/clang-tools-extra/clang-tidy/google/FunctionNamingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/FunctionNamingCheck.cpp
@@ -60,8 +60,8 @@ FixItHint generateFixItHint(const FunctionDecl *Decl) {
   size_t Index = 0;
   bool AtWordBoundary = true;
   while (Index < NewName.size()) {
-    char ch = NewName[Index];
-    if (isalnum(ch)) {
+    char Ch = NewName[Index];
+    if (isalnum(Ch)) {
       // Capitalize the first letter after every word boundary.
       if (AtWordBoundary) {
         NewName[Index] = toupper(NewName[Index]);

diff  --git a/clang-tools-extra/clang-tidy/hicpp/MultiwayPathsCoveredCheck.cpp b/clang-tools-extra/clang-tidy/hicpp/MultiwayPathsCoveredCheck.cpp
index 91e2cda0c24f..7feb0c73f4d1 100644
--- a/clang-tools-extra/clang-tidy/hicpp/MultiwayPathsCoveredCheck.cpp
+++ b/clang-tools-extra/clang-tidy/hicpp/MultiwayPathsCoveredCheck.cpp
@@ -83,10 +83,9 @@ static std::size_t getNumberOfPossibleValues(QualType T,
   // and would not return 2 as result.
   if (T->isBooleanType())
     return 2;
-  else if (T->isIntegralType(Context))
+  if (T->isIntegralType(Context))
     return twoPow(Context.getTypeSize(T));
-  else
-    return 1;
+  return 1;
 }
 
 void MultiwayPathsCoveredCheck::check(const MatchFinder::MatchResult &Result) {

diff  --git a/clang-tools-extra/clang-tidy/misc/NoRecursionCheck.cpp b/clang-tools-extra/clang-tidy/misc/NoRecursionCheck.cpp
index 5b1dbf3ac33e..1200230c53ed 100644
--- a/clang-tools-extra/clang-tidy/misc/NoRecursionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/NoRecursionCheck.cpp
@@ -135,10 +135,10 @@ template <typename T, unsigned SmallSize> class SmartSmallSetVector {
   /// Insert a new element into the SmartSmallSetVector.
   /// \returns true if the element was inserted into the SmartSmallSetVector.
   bool insert(const T &X) {
-    bool result = setInsert(X);
-    if (result)
+    bool Result = setInsert(X);
+    if (Result)
       Vector.push_back(X);
-    return result;
+    return Result;
   }
 
   /// Clear the SmartSmallSetVector and return the underlying vector.
@@ -157,7 +157,7 @@ using CallStackTy =
 // In given SCC, find *some* call stack that will be cyclic.
 // This will only find *one* such stack, it might not be the smallest one,
 // and there may be other loops.
-CallStackTy PathfindSomeCycle(ArrayRef<CallGraphNode *> SCC) {
+CallStackTy pathfindSomeCycle(ArrayRef<CallGraphNode *> SCC) {
   // We'll need to be able to performantly look up whether some CallGraphNode
   // is in SCC or not, so cache all the SCC elements in a set.
   const ImmutableSmallSet<CallGraphNode *, SmallSCCSize> SCCElts(SCC);
@@ -212,7 +212,7 @@ void NoRecursionCheck::handleSCC(ArrayRef<CallGraphNode *> SCC) {
   // the call graph. It doesn't *really* tell us about the cycles they form.
   // And there may be more than one cycle in SCC.
   // So let's form a call stack that eventually exposes *some* cycle.
-  const CallStackTy EventuallyCyclicCallStack = PathfindSomeCycle(SCC);
+  const CallStackTy EventuallyCyclicCallStack = pathfindSomeCycle(SCC);
   assert(!EventuallyCyclicCallStack.empty() && "We should've found the cycle");
 
   // While last node of the call stack does cause a loop, due to the way we

diff  --git a/clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp b/clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
index 9217c22b07bc..6a8436054b33 100644
--- a/clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
@@ -144,8 +144,7 @@ static bool areEquivalentExpr(const Expr *Left, const Expr *Right) {
     if (LeftUnaryExpr->isArgumentType() && RightUnaryExpr->isArgumentType())
       return LeftUnaryExpr->getArgumentType() ==
              RightUnaryExpr->getArgumentType();
-    else if (!LeftUnaryExpr->isArgumentType() &&
-             !RightUnaryExpr->isArgumentType())
+    if (!LeftUnaryExpr->isArgumentType() && !RightUnaryExpr->isArgumentType())
       return areEquivalentExpr(LeftUnaryExpr->getArgumentExpr(),
                                RightUnaryExpr->getArgumentExpr());
 
@@ -166,11 +165,11 @@ static bool areEquivalentRanges(BinaryOperatorKind OpcodeLHS,
     return OpcodeLHS == OpcodeRHS;
 
   // Handle the case where constants are off by one: x <= 4  <==>  x < 5.
-  APSInt ValueLHS_plus1;
+  APSInt ValueLhsPlus1;
   return ((OpcodeLHS == BO_LE && OpcodeRHS == BO_LT) ||
           (OpcodeLHS == BO_GT && OpcodeRHS == BO_GE)) &&
-         incrementWithoutOverflow(ValueLHS, ValueLHS_plus1) &&
-         APSInt::compareValues(ValueLHS_plus1, ValueRHS) == 0;
+         incrementWithoutOverflow(ValueLHS, ValueLhsPlus1) &&
+         APSInt::compareValues(ValueLhsPlus1, ValueRHS) == 0;
 }
 
 // For a given expression 'x', returns whether the ranges covered by the
@@ -208,10 +207,10 @@ static bool areExclusiveRanges(BinaryOperatorKind OpcodeLHS,
     return true;
 
   // Handle the case where constants are off by one: x > 5 && x < 6.
-  APSInt ValueLHS_plus1;
+  APSInt ValueLhsPlus1;
   if (OpcodeLHS == BO_GT && OpcodeRHS == BO_LT &&
-      incrementWithoutOverflow(ValueLHS, ValueLHS_plus1) &&
-      APSInt::compareValues(ValueLHS_plus1, ValueRHS) == 0)
+      incrementWithoutOverflow(ValueLHS, ValueLhsPlus1) &&
+      APSInt::compareValues(ValueLhsPlus1, ValueRHS) == 0)
     return true;
 
   return false;
@@ -247,10 +246,10 @@ static bool rangesFullyCoverDomain(BinaryOperatorKind OpcodeLHS,
   }
 
   // Handle the case where constants are off by one: x <= 4 || x >= 5.
-  APSInt ValueLHS_plus1;
+  APSInt ValueLhsPlus1;
   if (OpcodeLHS == BO_LE && OpcodeRHS == BO_GE &&
-      incrementWithoutOverflow(ValueLHS, ValueLHS_plus1) &&
-      APSInt::compareValues(ValueLHS_plus1, ValueRHS) == 0)
+      incrementWithoutOverflow(ValueLHS, ValueLhsPlus1) &&
+      APSInt::compareValues(ValueLhsPlus1, ValueRHS) == 0)
     return true;
 
   // Handle cases where the constants are 
diff erent: x > 4 || x <= 7.
@@ -623,7 +622,7 @@ static bool isNonConstReferenceType(QualType ParamType) {
 // controlled by the parameter `ParamsToCheckCount`.
 static bool
 canOverloadedOperatorArgsBeModified(const CXXOperatorCallExpr *OperatorCall,
-                                    bool checkSecondParam) {
+                                    bool CheckSecondParam) {
   const auto *OperatorDecl =
       dyn_cast_or_null<FunctionDecl>(OperatorCall->getCalleeDecl());
   // if we can't find the declaration, conservatively assume it can modify
@@ -643,7 +642,7 @@ canOverloadedOperatorArgsBeModified(const CXXOperatorCallExpr *OperatorCall,
   if (isNonConstReferenceType(OperatorDecl->getParamDecl(0)->getType()))
     return true;
 
-  return checkSecondParam && ParamCount == 2 &&
+  return CheckSecondParam && ParamCount == 2 &&
          isNonConstReferenceType(OperatorDecl->getParamDecl(1)->getType());
 }
 

diff  --git a/clang-tools-extra/clang-tidy/misc/UnusedParametersCheck.cpp b/clang-tools-extra/clang-tidy/misc/UnusedParametersCheck.cpp
index 535ac78b3f78..ee2ca87ab011 100644
--- a/clang-tools-extra/clang-tidy/misc/UnusedParametersCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/UnusedParametersCheck.cpp
@@ -177,8 +177,8 @@ void UnusedParametersCheck::check(const MatchFinder::MatchResult &Result) {
   if (const auto *Method = dyn_cast<CXXMethodDecl>(Function))
     if (Method->isLambdaStaticInvoker())
       return;
-  for (unsigned i = 0, e = Function->getNumParams(); i != e; ++i) {
-    const auto *Param = Function->getParamDecl(i);
+  for (unsigned I = 0, E = Function->getNumParams(); I != E; ++I) {
+    const auto *Param = Function->getParamDecl(I);
     if (Param->isUsed() || Param->isReferenced() || !Param->getDeclName() ||
         Param->hasAttr<UnusedAttr>())
       continue;
@@ -190,7 +190,7 @@ void UnusedParametersCheck::check(const MatchFinder::MatchResult &Result) {
          Function->getBody()->child_end()) ||
         (isa<CXXConstructorDecl>(Function) &&
          cast<CXXConstructorDecl>(Function)->getNumCtorInitializers() > 0))
-      warnOnUnusedParameter(Result, Function, i);
+      warnOnUnusedParameter(Result, Function, I);
   }
 }
 

diff  --git a/clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp b/clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
index 96055c29ffa8..ca96ab67090c 100644
--- a/clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
@@ -50,7 +50,7 @@ AST_MATCHER_P(DeducedTemplateSpecializationType, refsToTemplatedDecl,
 // A function that helps to tell whether a TargetDecl in a UsingDecl will be
 // checked. Only variable, function, function template, class template, class,
 // enum declaration and enum constant declaration are considered.
-static bool ShouldCheckDecl(const Decl *TargetDecl) {
+static bool shouldCheckDecl(const Decl *TargetDecl) {
   return isa<RecordDecl>(TargetDecl) || isa<ClassTemplateDecl>(TargetDecl) ||
          isa<FunctionDecl>(TargetDecl) || isa<VarDecl>(TargetDecl) ||
          isa<FunctionTemplateDecl>(TargetDecl) || isa<EnumDecl>(TargetDecl) ||
@@ -105,7 +105,7 @@ void UnusedUsingDeclsCheck::check(const MatchFinder::MatchResult &Result) {
             /*SkipTrailingWhitespaceAndNewLine=*/true));
     for (const auto *UsingShadow : Using->shadows()) {
       const auto *TargetDecl = UsingShadow->getTargetDecl()->getCanonicalDecl();
-      if (ShouldCheckDecl(TargetDecl))
+      if (shouldCheckDecl(TargetDecl))
         Context.UsingTargetDecls.insert(TargetDecl);
     }
     if (!Context.UsingTargetDecls.empty())

diff  --git a/clang-tools-extra/clang-tidy/modernize/DeprecatedIosBaseAliasesCheck.cpp b/clang-tools-extra/clang-tidy/modernize/DeprecatedIosBaseAliasesCheck.cpp
index 2eef9837e11c..d6216000fe20 100644
--- a/clang-tools-extra/clang-tidy/modernize/DeprecatedIosBaseAliasesCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/DeprecatedIosBaseAliasesCheck.cpp
@@ -59,7 +59,7 @@ void DeprecatedIosBaseAliasesCheck::check(
   SourceLocation EndLoc = IoStateLoc.getLocWithOffset(TypeName.size() - 1);
 
   if (Replacement) {
-    auto FixName = *Replacement;
+    const char *FixName = *Replacement;
     auto Builder = diag(IoStateLoc, "'std::ios_base::%0' is deprecated; use "
                                     "'std::ios_base::%1' instead")
                    << TypeName << FixName;

diff  --git a/clang-tools-extra/clang-tidy/modernize/LoopConvertCheck.cpp b/clang-tools-extra/clang-tidy/modernize/LoopConvertCheck.cpp
index 65384afdf5b8..c017cac5b4c8 100644
--- a/clang-tools-extra/clang-tidy/modernize/LoopConvertCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/LoopConvertCheck.cpp
@@ -71,20 +71,20 @@ static const char EndVarName[] = "endVar";
 static const char DerefByValueResultName[] = "derefByValueResult";
 static const char DerefByRefResultName[] = "derefByRefResult";
 // shared matchers
-static const TypeMatcher AnyType() { return anything(); }
+static const TypeMatcher anyType() { return anything(); }
 
-static const StatementMatcher IntegerComparisonMatcher() {
+static const StatementMatcher integerComparisonMatcher() {
   return expr(ignoringParenImpCasts(
       declRefExpr(to(varDecl(hasType(isInteger())).bind(ConditionVarName)))));
 }
 
-static const DeclarationMatcher InitToZeroMatcher() {
+static const DeclarationMatcher initToZeroMatcher() {
   return varDecl(
              hasInitializer(ignoringParenImpCasts(integerLiteral(equals(0)))))
       .bind(InitVarName);
 }
 
-static const StatementMatcher IncrementVarMatcher() {
+static const StatementMatcher incrementVarMatcher() {
   return declRefExpr(to(varDecl(hasType(isInteger())).bind(IncrementVarName)));
 }
 
@@ -112,15 +112,16 @@ StatementMatcher makeArrayLoopMatcher() {
 
   return forStmt(
              unless(isInTemplateInstantiation()),
-             hasLoopInit(declStmt(hasSingleDecl(InitToZeroMatcher()))),
+             hasLoopInit(declStmt(hasSingleDecl(initToZeroMatcher()))),
              hasCondition(anyOf(
                  binaryOperator(hasOperatorName("<"),
-                                hasLHS(IntegerComparisonMatcher()),
+                                hasLHS(integerComparisonMatcher()),
                                 hasRHS(ArrayBoundMatcher)),
                  binaryOperator(hasOperatorName(">"), hasLHS(ArrayBoundMatcher),
-                                hasRHS(IntegerComparisonMatcher())))),
-             hasIncrement(unaryOperator(hasOperatorName("++"),
-                                        hasUnaryOperand(IncrementVarMatcher()))))
+                                hasRHS(integerComparisonMatcher())))),
+             hasIncrement(
+                 unaryOperator(hasOperatorName("++"),
+                               hasUnaryOperand(incrementVarMatcher()))))
       .bind(LoopNameArray);
 }
 
@@ -226,7 +227,7 @@ StatementMatcher makeIteratorLoopMatcher(bool IsReverse) {
              hasIncrement(anyOf(
                  unaryOperator(hasOperatorName("++"),
                                hasUnaryOperand(declRefExpr(
-                                   to(varDecl(hasType(pointsTo(AnyType())))
+                                   to(varDecl(hasType(pointsTo(anyType())))
                                           .bind(IncrementVarName))))),
                  cxxOperatorCallExpr(
                      hasOverloadedOperatorName("++"),
@@ -313,17 +314,18 @@ StatementMatcher makePseudoArrayLoopMatcher() {
              unless(isInTemplateInstantiation()),
              hasLoopInit(
                  anyOf(declStmt(declCountIs(2),
-                                containsDeclaration(0, InitToZeroMatcher()),
+                                containsDeclaration(0, initToZeroMatcher()),
                                 containsDeclaration(1, EndDeclMatcher)),
-                       declStmt(hasSingleDecl(InitToZeroMatcher())))),
+                       declStmt(hasSingleDecl(initToZeroMatcher())))),
              hasCondition(anyOf(
                  binaryOperator(hasOperatorName("<"),
-                                hasLHS(IntegerComparisonMatcher()),
+                                hasLHS(integerComparisonMatcher()),
                                 hasRHS(IndexBoundMatcher)),
                  binaryOperator(hasOperatorName(">"), hasLHS(IndexBoundMatcher),
-                                hasRHS(IntegerComparisonMatcher())))),
-             hasIncrement(unaryOperator(hasOperatorName("++"),
-                                        hasUnaryOperand(IncrementVarMatcher()))))
+                                hasRHS(integerComparisonMatcher())))),
+             hasIncrement(
+                 unaryOperator(hasOperatorName("++"),
+                               hasUnaryOperand(incrementVarMatcher()))))
       .bind(LoopNamePseudoArray);
 }
 

diff  --git a/clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp b/clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp
index c20472c8de59..74dd4a3047ea 100644
--- a/clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/LoopConvertUtils.cpp
@@ -10,8 +10,8 @@
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/Lambda.h"
-#include "clang/Basic/SourceManager.h"
 #include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TokenKinds.h"
 #include "clang/Lex/Lexer.h"
 #include "llvm/ADT/APSInt.h"
@@ -50,8 +50,8 @@ bool StmtAncestorASTVisitor::TraverseStmt(Stmt *Statement) {
 /// Scope, as we can map a VarDecl to its DeclStmt, then walk up the parent tree
 /// using StmtAncestors.
 bool StmtAncestorASTVisitor::VisitDeclStmt(DeclStmt *Decls) {
-  for (const auto *decl : Decls->decls()) {
-    if (const auto *V = dyn_cast<VarDecl>(decl))
+  for (const auto *Decl : Decls->decls()) {
+    if (const auto *V = dyn_cast<VarDecl>(Decl))
       DeclParents.insert(std::make_pair(V, Decls));
   }
   return true;
@@ -356,7 +356,7 @@ static bool isAliasDecl(ASTContext *Context, const Decl *TheDecl,
 
   bool OnlyCasts = true;
   const Expr *Init = VDecl->getInit()->IgnoreParenImpCasts();
-  if (Init && isa<CXXConstructExpr>(Init)) {
+  if (isa_and_nonnull<CXXConstructExpr>(Init)) {
     Init = digThroughConstructors(Init);
     OnlyCasts = false;
   }

diff  --git a/clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp b/clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp
index 4130140d549c..54a5c5ae7e9a 100644
--- a/clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp
@@ -24,8 +24,7 @@ constexpr char ConstructorCall[] = "constructorCall";
 constexpr char ResetCall[] = "resetCall";
 constexpr char NewExpression[] = "newExpression";
 
-std::string GetNewExprName(const CXXNewExpr *NewExpr,
-                           const SourceManager &SM,
+std::string getNewExprName(const CXXNewExpr *NewExpr, const SourceManager &SM,
                            const LangOptions &Lang) {
   StringRef WrittenName = Lexer::getSourceText(
       CharSourceRange::getTokenRange(
@@ -183,8 +182,7 @@ void MakeSmartPtrCheck::checkConstruct(SourceManager &SM, ASTContext *Ctx,
     // we have to add it back.
     ConstructCallEnd = ConstructCallStart.getLocWithOffset(ExprStr.size());
     Diag << FixItHint::CreateInsertion(
-        ConstructCallEnd,
-        "<" + GetNewExprName(New, SM, getLangOpts()) + ">");
+        ConstructCallEnd, "<" + getNewExprName(New, SM, getLangOpts()) + ">");
   } else {
     ConstructCallEnd = ConstructCallStart.getLocWithOffset(LAngle);
   }
@@ -248,7 +246,7 @@ void MakeSmartPtrCheck::checkReset(SourceManager &SM, ASTContext *Ctx,
   Diag << FixItHint::CreateReplacement(
       CharSourceRange::getCharRange(OperatorLoc, ExprEnd),
       (llvm::Twine(" = ") + MakeSmartPtrFunctionName + "<" +
-       GetNewExprName(New, SM, getLangOpts()) + ">")
+       getNewExprName(New, SM, getLangOpts()) + ">")
           .str());
 
   if (Expr->isArrow())
@@ -389,19 +387,18 @@ bool MakeSmartPtrCheck::replaceNew(DiagnosticBuilder &Diag,
         //   std::make_smart_ptr<S>(std::initializer_list<int>({}));
         //   std::make_smart_ptr<S2>(S{1, 2}, 3);
         return false;
-      } else {
-        // Direct initialization with ordinary constructors.
-        //   struct S { S(int x); S(); };
-        //   smart_ptr<S>(new S{5});
-        //   smart_ptr<S>(new S{}); // use default constructor
-        // The arguments in the initialization list are going to be forwarded to
-        // the constructor, so this has to be replaced with:
-        //   std::make_smart_ptr<S>(5);
-        //   std::make_smart_ptr<S>();
-        InitRange = SourceRange(
-            NewConstruct->getParenOrBraceRange().getBegin().getLocWithOffset(1),
-            NewConstruct->getParenOrBraceRange().getEnd().getLocWithOffset(-1));
       }
+      // Direct initialization with ordinary constructors.
+      //   struct S { S(int x); S(); };
+      //   smart_ptr<S>(new S{5});
+      //   smart_ptr<S>(new S{}); // use default constructor
+      // The arguments in the initialization list are going to be forwarded to
+      // the constructor, so this has to be replaced with:
+      //   std::make_smart_ptr<S>(5);
+      //   std::make_smart_ptr<S>();
+      InitRange = SourceRange(
+          NewConstruct->getParenOrBraceRange().getBegin().getLocWithOffset(1),
+          NewConstruct->getParenOrBraceRange().getEnd().getLocWithOffset(-1));
     } else {
       // Aggregate initialization.
       //   smart_ptr<Pair>(new Pair{first, second});

diff  --git a/clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.cpp b/clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.cpp
index 7e4473885098..3214ae84b74d 100644
--- a/clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/RedundantVoidArgCheck.cpp
@@ -20,13 +20,13 @@ namespace {
 
 // Determine if the given QualType is a nullary function or pointer to same.
 bool protoTypeHasNoParms(QualType QT) {
-  if (auto PT = QT->getAs<PointerType>()) {
+  if (const auto *PT = QT->getAs<PointerType>()) {
     QT = PT->getPointeeType();
   }
   if (auto *MPT = QT->getAs<MemberPointerType>()) {
     QT = MPT->getPointeeType();
   }
-  if (auto FP = QT->getAs<FunctionProtoType>()) {
+  if (const auto *FP = QT->getAs<FunctionProtoType>()) {
     return FP->getNumParams() == 0;
   }
   return false;

diff  --git a/clang-tools-extra/clang-tidy/modernize/ReplaceRandomShuffleCheck.cpp b/clang-tools-extra/clang-tidy/modernize/ReplaceRandomShuffleCheck.cpp
index f21482d165f8..3cb934e4a0f4 100644
--- a/clang-tools-extra/clang-tidy/modernize/ReplaceRandomShuffleCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/ReplaceRandomShuffleCheck.cpp
@@ -71,15 +71,14 @@ void ReplaceRandomShuffleCheck::check(const MatchFinder::MatchResult &Result) {
           MatchedArgumentThree->getSourceRange(),
           "std::mt19937(std::random_device()())");
       return DiagL;
-    } else {
-      auto DiagL = diag(MatchedCallExpr->getBeginLoc(),
-                        "'std::random_shuffle' has been removed in C++17; use "
-                        "'std::shuffle' instead");
-      DiagL << FixItHint::CreateInsertion(
-          MatchedCallExpr->getRParenLoc(),
-          ", std::mt19937(std::random_device()())");
-      return DiagL;
     }
+    auto DiagL = diag(MatchedCallExpr->getBeginLoc(),
+                      "'std::random_shuffle' has been removed in C++17; use "
+                      "'std::shuffle' instead");
+    DiagL << FixItHint::CreateInsertion(
+        MatchedCallExpr->getRParenLoc(),
+        ", std::mt19937(std::random_device()())");
+    return DiagL;
   }();
 
   std::string NewName = "shuffle";

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseAutoCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseAutoCheck.cpp
index fab13cdbfe9f..a4a81ce6cd77 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseAutoCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseAutoCheck.cpp
@@ -27,7 +27,7 @@ const char DeclWithNewId[] = "decl_new";
 const char DeclWithCastId[] = "decl_cast";
 const char DeclWithTemplateCastId[] = "decl_template";
 
-size_t GetTypeNameLength(bool RemoveStars, StringRef Text) {
+size_t getTypeNameLength(bool RemoveStars, StringRef Text) {
   enum CharType { Space, Alpha, Punctuation };
   CharType LastChar = Space, BeforeSpace = Punctuation;
   size_t NumChars = 0;
@@ -399,7 +399,7 @@ void UseAutoCheck::replaceExpr(
   SourceRange Range(Loc.getSourceRange());
 
   if (MinTypeNameLength != 0 &&
-      GetTypeNameLength(RemoveStars,
+      getTypeNameLength(RemoveStars,
                         tooling::fixit::getText(Loc.getSourceRange(),
                                                 FirstDecl->getASTContext())) <
           MinTypeNameLength)

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseEqualsDefaultCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseEqualsDefaultCheck.cpp
index d1d25825ba93..9b91d181ba01 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseEqualsDefaultCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseEqualsDefaultCheck.cpp
@@ -7,10 +7,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "UseEqualsDefaultCheck.h"
+#include "../utils/LexerUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/Lex/Lexer.h"
-#include "../utils/LexerUtils.h"
 
 using namespace clang::ast_matchers;
 

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseNullptrCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseNullptrCheck.cpp
index 25a789dd0831..e32687ba7b35 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseNullptrCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseNullptrCheck.cpp
@@ -173,9 +173,9 @@ class MacroArgUsageVisitor : public RecursiveASTVisitor<MacroArgUsageVisitor> {
 class CastSequenceVisitor : public RecursiveASTVisitor<CastSequenceVisitor> {
 public:
   CastSequenceVisitor(ASTContext &Context, ArrayRef<StringRef> NullMacros,
-                      ClangTidyCheck &check)
+                      ClangTidyCheck &Check)
       : SM(Context.getSourceManager()), Context(Context),
-        NullMacros(NullMacros), Check(check), FirstSubExpr(nullptr),
+        NullMacros(NullMacros), Check(Check), FirstSubExpr(nullptr),
         PruneSubtree(false) {}
 
   bool TraverseStmt(Stmt *S) {

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseOverrideCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseOverrideCheck.cpp
index bfce7a61470f..510e17f58c81 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseOverrideCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseOverrideCheck.cpp
@@ -43,7 +43,7 @@ void UseOverrideCheck::registerMatchers(MatchFinder *Finder) {
 // Re-lex the tokens to get precise locations to insert 'override' and remove
 // 'virtual'.
 static SmallVector<Token, 16>
-ParseTokens(CharSourceRange Range, const MatchFinder::MatchResult &Result) {
+parseTokens(CharSourceRange Range, const MatchFinder::MatchResult &Result) {
   const SourceManager &Sources = *Result.SourceManager;
   std::pair<FileID, unsigned> LocInfo =
       Sources.getDecomposedLoc(Range.getBegin());
@@ -75,7 +75,7 @@ ParseTokens(CharSourceRange Range, const MatchFinder::MatchResult &Result) {
   return Tokens;
 }
 
-static StringRef GetText(const Token &Tok, const SourceManager &Sources) {
+static StringRef getText(const Token &Tok, const SourceManager &Sources) {
   return StringRef(Sources.getCharacterData(Tok.getLocation()),
                    Tok.getLength());
 }
@@ -136,7 +136,7 @@ void UseOverrideCheck::check(const MatchFinder::MatchResult &Result) {
   // FIXME: Instead of re-lexing and looking for specific macros such as
   // 'ABSTRACT', properly store the location of 'virtual' and '= 0' in each
   // FunctionDecl.
-  SmallVector<Token, 16> Tokens = ParseTokens(FileRange, Result);
+  SmallVector<Token, 16> Tokens = parseTokens(FileRange, Result);
 
   // Add 'override' on inline declarations that don't already have it.
   if (!HasFinal && !HasOverride) {
@@ -185,15 +185,15 @@ void UseOverrideCheck::check(const MatchFinder::MatchResult &Result) {
       // location will point until after those markings. Therefore, the override
       // keyword shouldn't be inserted at the end, but before the '='.
       if (Tokens.size() > 2 &&
-          (GetText(Tokens.back(), Sources) == "0" ||
+          (getText(Tokens.back(), Sources) == "0" ||
            Tokens.back().is(tok::kw_default) ||
            Tokens.back().is(tok::kw_delete)) &&
-          GetText(Tokens[Tokens.size() - 2], Sources) == "=") {
+          getText(Tokens[Tokens.size() - 2], Sources) == "=") {
         InsertLoc = Tokens[Tokens.size() - 2].getLocation();
         // Check if we need to insert a space.
         if ((Tokens[Tokens.size() - 2].getFlags() & Token::LeadingSpace) == 0)
           ReplacementText = " " + OverrideSpelling + " ";
-      } else if (GetText(Tokens.back(), Sources) == "ABSTRACT")
+      } else if (getText(Tokens.back(), Sources) == "ABSTRACT")
         InsertLoc = Tokens.back().getLocation();
     }
 

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseTrailingReturnTypeCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseTrailingReturnTypeCheck.cpp
index bbb1e8c65a4f..b5c722755901 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseTrailingReturnTypeCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseTrailingReturnTypeCheck.cpp
@@ -31,7 +31,7 @@ struct UnqualNameVisitor : public RecursiveASTVisitor<UnqualNameVisitor> {
 
   bool shouldWalkTypesOfTypeLocs() const { return false; }
 
-  bool VisitUnqualName(StringRef UnqualName) {
+  bool visitUnqualName(StringRef UnqualName) {
     // Check for collisions with function arguments.
     for (ParmVarDecl *Param : F.parameters())
       if (const IdentifierInfo *Ident = Param->getIdentifier())
@@ -49,17 +49,17 @@ struct UnqualNameVisitor : public RecursiveASTVisitor<UnqualNameVisitor> {
     if (!Elaborated) {
       switch (TL.getTypeLocClass()) {
       case TypeLoc::Record:
-        if (VisitUnqualName(
+        if (visitUnqualName(
                 TL.getAs<RecordTypeLoc>().getTypePtr()->getDecl()->getName()))
           return false;
         break;
       case TypeLoc::Enum:
-        if (VisitUnqualName(
+        if (visitUnqualName(
                 TL.getAs<EnumTypeLoc>().getTypePtr()->getDecl()->getName()))
           return false;
         break;
       case TypeLoc::TemplateSpecialization:
-        if (VisitUnqualName(TL.getAs<TemplateSpecializationTypeLoc>()
+        if (visitUnqualName(TL.getAs<TemplateSpecializationTypeLoc>()
                                 .getTypePtr()
                                 ->getTemplateName()
                                 .getAsTemplateDecl()
@@ -67,7 +67,7 @@ struct UnqualNameVisitor : public RecursiveASTVisitor<UnqualNameVisitor> {
           return false;
         break;
       case TypeLoc::Typedef:
-        if (VisitUnqualName(
+        if (visitUnqualName(
                 TL.getAs<TypedefTypeLoc>().getTypePtr()->getDecl()->getName()))
           return false;
         break;
@@ -97,7 +97,7 @@ struct UnqualNameVisitor : public RecursiveASTVisitor<UnqualNameVisitor> {
   bool VisitDeclRefExpr(DeclRefExpr *S) {
     DeclarationName Name = S->getNameInfo().getName();
     return S->getQualifierLoc() || !Name.isIdentifier() ||
-           !VisitUnqualName(Name.getAsIdentifierInfo()->getName());
+           !visitUnqualName(Name.getAsIdentifierInfo()->getName());
   }
 
 private:
@@ -160,11 +160,11 @@ SourceLocation UseTrailingReturnTypeCheck::findTrailingReturnTypeSourceLocation(
   return Result;
 }
 
-static bool IsCVR(Token T) {
+static bool isCvr(Token T) {
   return T.isOneOf(tok::kw_const, tok::kw_volatile, tok::kw_restrict);
 }
 
-static bool IsSpecifier(Token T) {
+static bool isSpecifier(Token T) {
   return T.isOneOf(tok::kw_constexpr, tok::kw_inline, tok::kw_extern,
                    tok::kw_static, tok::kw_friend, tok::kw_virtual);
 }
@@ -192,8 +192,8 @@ classifyToken(const FunctionDecl &F, Preprocessor &PP, Token Tok) {
     if (T.is(tok::eof))
       break;
 
-    bool Qual = IsCVR(T);
-    bool Spec = IsSpecifier(T);
+    bool Qual = isCvr(T);
+    bool Spec = isSpecifier(T);
     CT.isQualifier &= Qual;
     CT.isSpecifier &= Spec;
     ContainsQualifiers |= Qual;

diff  --git a/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp b/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
index f3e8506b5513..a12a056f13ea 100644
--- a/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp
@@ -58,13 +58,13 @@ void UseUsingCheck::check(const MatchFinder::MatchResult &Result) {
     return;
   }
 
-  auto printPolicy = PrintingPolicy(getLangOpts());
-  printPolicy.SuppressScope = true;
-  printPolicy.ConstantArraySizeAsWritten = true;
-  printPolicy.UseVoidForZeroParams = false;
-  printPolicy.PrintInjectedClassNameWithArguments = false;
+  PrintingPolicy PrintPolicy(getLangOpts());
+  PrintPolicy.SuppressScope = true;
+  PrintPolicy.ConstantArraySizeAsWritten = true;
+  PrintPolicy.UseVoidForZeroParams = false;
+  PrintPolicy.PrintInjectedClassNameWithArguments = false;
 
-  std::string Type = MatchedDecl->getUnderlyingType().getAsString(printPolicy);
+  std::string Type = MatchedDecl->getUnderlyingType().getAsString(PrintPolicy);
   std::string Name = MatchedDecl->getNameAsString();
   SourceRange ReplaceRange = MatchedDecl->getSourceRange();
 

diff  --git a/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp b/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
index 8ababfe46e85..b108f75fbc7a 100644
--- a/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
+++ b/clang-tools-extra/clang-tidy/mpi/BufferDerefCheck.cpp
@@ -38,7 +38,7 @@ void BufferDerefCheck::check(const MatchFinder::MatchResult &Result) {
 
   // Adds the type and expression of a buffer that is used in the MPI call
   // expression to the captured containers.
-  auto addBuffer = [&CE, &Result, &BufferTypes,
+  auto AddBuffer = [&CE, &Result, &BufferTypes,
                     &BufferExprs](const size_t BufferIdx) {
     // Skip null pointer constants and in place 'operators'.
     if (CE->getArg(BufferIdx)->isNullPointerConstant(
@@ -61,18 +61,18 @@ void BufferDerefCheck::check(const MatchFinder::MatchResult &Result) {
   // MPI call expression. The number passed to the lambda corresponds to the
   // argument index of the currently verified MPI function call.
   if (FuncClassifier.isPointToPointType(Identifier)) {
-    addBuffer(0);
+    AddBuffer(0);
   } else if (FuncClassifier.isCollectiveType(Identifier)) {
     if (FuncClassifier.isReduceType(Identifier)) {
-      addBuffer(0);
-      addBuffer(1);
+      AddBuffer(0);
+      AddBuffer(1);
     } else if (FuncClassifier.isScatterType(Identifier) ||
                FuncClassifier.isGatherType(Identifier) ||
                FuncClassifier.isAlltoallType(Identifier)) {
-      addBuffer(0);
-      addBuffer(3);
+      AddBuffer(0);
+      AddBuffer(3);
     } else if (FuncClassifier.isBcastType(Identifier)) {
-      addBuffer(0);
+      AddBuffer(0);
     }
   }
 
@@ -81,9 +81,9 @@ void BufferDerefCheck::check(const MatchFinder::MatchResult &Result) {
 
 void BufferDerefCheck::checkBuffers(ArrayRef<const Type *> BufferTypes,
                                     ArrayRef<const Expr *> BufferExprs) {
-  for (size_t i = 0; i < BufferTypes.size(); ++i) {
+  for (size_t I = 0; I < BufferTypes.size(); ++I) {
     unsigned IndirectionCount = 0;
-    const Type *BufferType = BufferTypes[i];
+    const Type *BufferType = BufferTypes[I];
     llvm::SmallVector<IndirectionType, 1> Indirections;
 
     // Capture the depth and types of indirections for the passed buffer.
@@ -120,7 +120,7 @@ void BufferDerefCheck::checkBuffers(ArrayRef<const Type *> BufferTypes,
         }
       }
 
-      const auto Loc = BufferExprs[i]->getSourceRange().getBegin();
+      const auto Loc = BufferExprs[I]->getSourceRange().getBegin();
       diag(Loc, "buffer is insufficiently dereferenced: %0") << IndirectionDesc;
     }
   }

diff  --git a/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp b/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
index f305ddf883a0..2d8da68cd6a7 100644
--- a/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
+++ b/clang-tools-extra/clang-tidy/mpi/TypeMismatchCheck.cpp
@@ -216,9 +216,9 @@ static bool isTypedefTypeMatching(const TypedefType *const Typedef,
       {"uint8_t", "MPI_UINT8_T"},   {"uint16_t", "MPI_UINT16_T"},
       {"uint32_t", "MPI_UINT32_T"}, {"uint64_t", "MPI_UINT64_T"}};
 
-  const auto it = FixedWidthMatches.find(Typedef->getDecl()->getName());
+  const auto It = FixedWidthMatches.find(Typedef->getDecl()->getName());
   // Check if the typedef is known and not matching the MPI datatype.
-  if (it != FixedWidthMatches.end() && it->getValue() != MPIDatatype) {
+  if (It != FixedWidthMatches.end() && It->getValue() != MPIDatatype) {
     BufferTypeName = std::string(Typedef->getDecl()->getName());
     return false;
   }
@@ -231,8 +231,8 @@ static bool isTypedefTypeMatching(const TypedefType *const Typedef,
 /// \param idx argument index
 ///
 /// \returns type of the argument
-static const Type *argumentType(const CallExpr *const CE, const size_t idx) {
-  const QualType QT = CE->getArg(idx)->IgnoreImpCasts()->getType();
+static const Type *argumentType(const CallExpr *const CE, const size_t Idx) {
+  const QualType QT = CE->getArg(Idx)->IgnoreImpCasts()->getType();
   return QT.getTypePtr()->getPointeeOrArrayElementType();
 }
 
@@ -257,8 +257,8 @@ void TypeMismatchCheck::check(const MatchFinder::MatchResult &Result) {
 
   // Adds a buffer, MPI datatype pair of an MPI call expression to the
   // containers. For buffers, the type and expression is captured.
-  auto addPair = [&CE, &Result, &BufferTypes, &BufferExprs, &MPIDatatypes](
-      const size_t BufferIdx, const size_t DatatypeIdx) {
+  auto AddPair = [&CE, &Result, &BufferTypes, &BufferExprs, &MPIDatatypes](
+                     const size_t BufferIdx, const size_t DatatypeIdx) {
     // Skip null pointer constants and in place 'operators'.
     if (CE->getArg(BufferIdx)->isNullPointerConstant(
             *Result.Context, Expr::NPC_ValueDependentIsNull) ||
@@ -282,18 +282,18 @@ void TypeMismatchCheck::check(const MatchFinder::MatchResult &Result) {
 
   // Collect all buffer, MPI datatype pairs for the inspected call expression.
   if (FuncClassifier.isPointToPointType(Identifier)) {
-    addPair(0, 2);
+    AddPair(0, 2);
   } else if (FuncClassifier.isCollectiveType(Identifier)) {
     if (FuncClassifier.isReduceType(Identifier)) {
-      addPair(0, 3);
-      addPair(1, 3);
+      AddPair(0, 3);
+      AddPair(1, 3);
     } else if (FuncClassifier.isScatterType(Identifier) ||
                FuncClassifier.isGatherType(Identifier) ||
                FuncClassifier.isAlltoallType(Identifier)) {
-      addPair(0, 2);
-      addPair(3, 5);
+      AddPair(0, 2);
+      AddPair(3, 5);
     } else if (FuncClassifier.isBcastType(Identifier)) {
-      addPair(0, 2);
+      AddPair(0, 2);
     }
   }
   checkArguments(BufferTypes, BufferExprs, MPIDatatypes, getLangOpts());
@@ -305,28 +305,28 @@ void TypeMismatchCheck::checkArguments(ArrayRef<const Type *> BufferTypes,
                                        const LangOptions &LO) {
   std::string BufferTypeName;
 
-  for (size_t i = 0; i < MPIDatatypes.size(); ++i) {
-    const Type *const BT = BufferTypes[i];
+  for (size_t I = 0; I < MPIDatatypes.size(); ++I) {
+    const Type *const BT = BufferTypes[I];
     bool Error = false;
 
     if (const auto *Typedef = BT->getAs<TypedefType>()) {
       Error = !isTypedefTypeMatching(Typedef, BufferTypeName,
-                                     std::string(MPIDatatypes[i]));
+                                     std::string(MPIDatatypes[I]));
     } else if (const auto *Complex = BT->getAs<ComplexType>()) {
       Error = !isCComplexTypeMatching(Complex, BufferTypeName,
-                                      std::string(MPIDatatypes[i]), LO);
+                                      std::string(MPIDatatypes[I]), LO);
     } else if (const auto *Template = BT->getAs<TemplateSpecializationType>()) {
       Error = !isCXXComplexTypeMatching(Template, BufferTypeName,
-                                        std::string(MPIDatatypes[i]), LO);
+                                        std::string(MPIDatatypes[I]), LO);
     } else if (const auto *Builtin = BT->getAs<BuiltinType>()) {
       Error = !isBuiltinTypeMatching(Builtin, BufferTypeName,
-                                     std::string(MPIDatatypes[i]), LO);
+                                     std::string(MPIDatatypes[I]), LO);
     }
 
     if (Error) {
-      const auto Loc = BufferExprs[i]->getSourceRange().getBegin();
+      const auto Loc = BufferExprs[I]->getSourceRange().getBegin();
       diag(Loc, "buffer type '%0' does not match the MPI datatype '%1'")
-          << BufferTypeName << MPIDatatypes[i];
+          << BufferTypeName << MPIDatatypes[I];
     }
   }
 }

diff  --git a/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp b/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
index 956cb79ed517..35b5bb826f57 100644
--- a/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/ForbiddenSubclassingCheck.cpp
@@ -7,11 +7,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "ForbiddenSubclassingCheck.h"
+#include "../utils/OptionsUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/SmallVector.h"
-#include "../utils/OptionsUtils.h"
 
 using namespace clang::ast_matchers;
 

diff  --git a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
index b4e6d0e3d202..758d397a445e 100644
--- a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "PropertyDeclarationCheck.h"
-#include <algorithm>
 #include "../utils/OptionsUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
@@ -15,6 +14,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/Regex.h"
+#include <algorithm>
 
 using namespace clang::ast_matchers;
 

diff  --git a/clang-tools-extra/clang-tidy/performance/FasterStringFindCheck.cpp b/clang-tools-extra/clang-tidy/performance/FasterStringFindCheck.cpp
index 0d2efb31b774..0b329668adc2 100644
--- a/clang-tools-extra/clang-tidy/performance/FasterStringFindCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/FasterStringFindCheck.cpp
@@ -21,21 +21,21 @@ namespace performance {
 
 namespace {
 
-llvm::Optional<std::string> MakeCharacterLiteral(const StringLiteral *Literal) {
+llvm::Optional<std::string> makeCharacterLiteral(const StringLiteral *Literal) {
   std::string Result;
   {
     llvm::raw_string_ostream OS(Result);
     Literal->outputString(OS);
   }
   // Now replace the " with '.
-  auto pos = Result.find_first_of('"');
-  if (pos == Result.npos)
+  auto Pos = Result.find_first_of('"');
+  if (Pos == Result.npos)
     return llvm::None;
-  Result[pos] = '\'';
-  pos = Result.find_last_of('"');
-  if (pos == Result.npos)
+  Result[Pos] = '\'';
+  Pos = Result.find_last_of('"');
+  if (Pos == Result.npos)
     return llvm::None;
-  Result[pos] = '\'';
+  Result[Pos] = '\'';
   return Result;
 }
 
@@ -83,7 +83,7 @@ void FasterStringFindCheck::check(const MatchFinder::MatchResult &Result) {
   const auto *Literal = Result.Nodes.getNodeAs<StringLiteral>("literal");
   const auto *FindFunc = Result.Nodes.getNodeAs<FunctionDecl>("func");
 
-  auto Replacement = MakeCharacterLiteral(Literal);
+  auto Replacement = makeCharacterLiteral(Literal);
   if (!Replacement)
     return;
 

diff  --git a/clang-tools-extra/clang-tidy/performance/ImplicitConversionInLoopCheck.cpp b/clang-tools-extra/clang-tidy/performance/ImplicitConversionInLoopCheck.cpp
index 38ede424be66..738e376744e3 100644
--- a/clang-tools-extra/clang-tidy/performance/ImplicitConversionInLoopCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/ImplicitConversionInLoopCheck.cpp
@@ -24,10 +24,10 @@ namespace performance {
 // The subtelty is that in some cases (user defined conversions), we can
 // get to ImplicitCastExpr inside each other, with the outer one a NoOp. In this
 // case we skip the first cast expr.
-static bool IsNonTrivialImplicitCast(const Stmt *ST) {
+static bool isNonTrivialImplicitCast(const Stmt *ST) {
   if (const auto *ICE = dyn_cast<ImplicitCastExpr>(ST)) {
     return (ICE->getCastKind() != CK_NoOp) ||
-            IsNonTrivialImplicitCast(ICE->getSubExpr());
+           isNonTrivialImplicitCast(ICE->getSubExpr());
   }
   return false;
 }
@@ -81,7 +81,7 @@ void ImplicitConversionInLoopCheck::check(
   // iterator returns a value instead of a reference, and the loop variable
   // is a reference. This situation is fine (it probably produces the same
   // code at the end).
-  if (IsNonTrivialImplicitCast(Materialized->getSubExpr()))
+  if (isNonTrivialImplicitCast(Materialized->getSubExpr()))
     ReportAndFix(Result.Context, VD, OperatorCall);
 }
 

diff  --git a/clang-tools-extra/clang-tidy/performance/InefficientStringConcatenationCheck.cpp b/clang-tools-extra/clang-tidy/performance/InefficientStringConcatenationCheck.cpp
index c883fc2f1f4a..f73643f609c5 100644
--- a/clang-tools-extra/clang-tidy/performance/InefficientStringConcatenationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/InefficientStringConcatenationCheck.cpp
@@ -69,7 +69,7 @@ void InefficientStringConcatenationCheck::check(
   const auto *LhsStr = Result.Nodes.getNodeAs<DeclRefExpr>("lhsStr");
   const auto *PlusOperator =
       Result.Nodes.getNodeAs<CXXOperatorCallExpr>("plusOperator");
-  const auto DiagMsg =
+  const char *DiagMsg =
       "string concatenation results in allocation of unnecessary temporary "
       "strings; consider using 'operator+=' or 'string::append()' instead";
 

diff  --git a/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp b/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
index 776a8ca1d7c1..f7c5112d22ea 100644
--- a/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
@@ -7,11 +7,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "InefficientVectorOperationCheck.h"
+#include "../utils/DeclRefExprUtils.h"
+#include "../utils/OptionsUtils.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/Lex/Lexer.h"
-#include "../utils/DeclRefExprUtils.h"
-#include "../utils/OptionsUtils.h"
 
 using namespace clang::ast_matchers;
 

diff  --git a/clang-tools-extra/clang-tidy/performance/MoveConstArgCheck.cpp b/clang-tools-extra/clang-tidy/performance/MoveConstArgCheck.cpp
index 0cb1b82782d9..7ff13fe2823d 100644
--- a/clang-tools-extra/clang-tidy/performance/MoveConstArgCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/MoveConstArgCheck.cpp
@@ -16,7 +16,7 @@ namespace clang {
 namespace tidy {
 namespace performance {
 
-static void ReplaceCallWithArg(const CallExpr *Call, DiagnosticBuilder &Diag,
+static void replaceCallWithArg(const CallExpr *Call, DiagnosticBuilder &Diag,
                                const SourceManager &SM,
                                const LangOptions &LangOpts) {
   const Expr *Arg = Call->getArg(0);
@@ -104,13 +104,13 @@ void MoveConstArgCheck::check(const MatchFinder::MatchResult &Result) {
                 << (IsConstArg && IsVariable && !IsTriviallyCopyable) << Var
                 << Arg->getType();
 
-    ReplaceCallWithArg(CallMove, Diag, SM, getLangOpts());
+    replaceCallWithArg(CallMove, Diag, SM, getLangOpts());
   } else if (ReceivingExpr) {
     auto Diag = diag(FileMoveRange.getBegin(),
                      "passing result of std::move() as a const reference "
                      "argument; no move will actually happen");
 
-    ReplaceCallWithArg(CallMove, Diag, SM, getLangOpts());
+    replaceCallWithArg(CallMove, Diag, SM, getLangOpts());
   }
 }
 

diff  --git a/clang-tools-extra/clang-tidy/performance/TypePromotionInMathFnCheck.cpp b/clang-tools-extra/clang-tidy/performance/TypePromotionInMathFnCheck.cpp
index a35220ad9d0f..8f91200c28e4 100644
--- a/clang-tools-extra/clang-tidy/performance/TypePromotionInMathFnCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/TypePromotionInMathFnCheck.cpp
@@ -52,10 +52,10 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
   constexpr BuiltinType::Kind DoubleTy = BuiltinType::Double;
   constexpr BuiltinType::Kind LongDoubleTy = BuiltinType::LongDouble;
 
-  auto hasBuiltinTyParam = [](int Pos, BuiltinType::Kind Kind) {
+  auto HasBuiltinTyParam = [](int Pos, BuiltinType::Kind Kind) {
     return hasParameter(Pos, hasType(isBuiltinType(Kind)));
   };
-  auto hasBuiltinTyArg = [](int Pos, BuiltinType::Kind Kind) {
+  auto HasBuiltinTyArg = [](int Pos, BuiltinType::Kind Kind) {
     return hasArgument(Pos, hasType(isBuiltinType(Kind)));
   };
 
@@ -69,8 +69,8 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
       "::tanh", "::tgamma", "::trunc", "::llround", "::lround");
   Finder->addMatcher(
       callExpr(callee(functionDecl(OneDoubleArgFns, parameterCountIs(1),
-                                   hasBuiltinTyParam(0, DoubleTy))),
-               hasBuiltinTyArg(0, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy))),
+               HasBuiltinTyArg(0, FloatTy))
           .bind("call"),
       this);
 
@@ -80,20 +80,20 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
                                     "::nextafter", "::pow", "::remainder");
   Finder->addMatcher(
       callExpr(callee(functionDecl(TwoDoubleArgFns, parameterCountIs(2),
-                                   hasBuiltinTyParam(0, DoubleTy),
-                                   hasBuiltinTyParam(1, DoubleTy))),
-               hasBuiltinTyArg(0, FloatTy), hasBuiltinTyArg(1, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy),
+                                   HasBuiltinTyParam(1, DoubleTy))),
+               HasBuiltinTyArg(0, FloatTy), HasBuiltinTyArg(1, FloatTy))
           .bind("call"),
       this);
 
   // Match calls to fma(double, double, double) where all args are floats.
   Finder->addMatcher(
       callExpr(callee(functionDecl(hasName("::fma"), parameterCountIs(3),
-                                   hasBuiltinTyParam(0, DoubleTy),
-                                   hasBuiltinTyParam(1, DoubleTy),
-                                   hasBuiltinTyParam(2, DoubleTy))),
-               hasBuiltinTyArg(0, FloatTy), hasBuiltinTyArg(1, FloatTy),
-               hasBuiltinTyArg(2, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy),
+                                   HasBuiltinTyParam(1, DoubleTy),
+                                   HasBuiltinTyParam(2, DoubleTy))),
+               HasBuiltinTyArg(0, FloatTy), HasBuiltinTyArg(1, FloatTy),
+               HasBuiltinTyArg(2, FloatTy))
           .bind("call"),
       this);
 
@@ -101,10 +101,10 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(
       callExpr(callee(functionDecl(
                    hasName("::frexp"), parameterCountIs(2),
-                   hasBuiltinTyParam(0, DoubleTy),
+                   HasBuiltinTyParam(0, DoubleTy),
                    hasParameter(1, parmVarDecl(hasType(pointerType(
                                        pointee(isBuiltinType(IntTy)))))))),
-               hasBuiltinTyArg(0, FloatTy))
+               HasBuiltinTyArg(0, FloatTy))
           .bind("call"),
       this);
 
@@ -112,9 +112,9 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
   // float.
   Finder->addMatcher(
       callExpr(callee(functionDecl(hasName("::nexttoward"), parameterCountIs(2),
-                                   hasBuiltinTyParam(0, DoubleTy),
-                                   hasBuiltinTyParam(1, LongDoubleTy))),
-               hasBuiltinTyArg(0, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy),
+                                   HasBuiltinTyParam(1, LongDoubleTy))),
+               HasBuiltinTyArg(0, FloatTy))
           .bind("call"),
       this);
 
@@ -124,28 +124,28 @@ void TypePromotionInMathFnCheck::registerMatchers(MatchFinder *Finder) {
       callExpr(
           callee(functionDecl(
               hasName("::remquo"), parameterCountIs(3),
-              hasBuiltinTyParam(0, DoubleTy), hasBuiltinTyParam(1, DoubleTy),
+              HasBuiltinTyParam(0, DoubleTy), HasBuiltinTyParam(1, DoubleTy),
               hasParameter(2, parmVarDecl(hasType(pointerType(
                                   pointee(isBuiltinType(IntTy)))))))),
-          hasBuiltinTyArg(0, FloatTy), hasBuiltinTyArg(1, FloatTy))
+          HasBuiltinTyArg(0, FloatTy), HasBuiltinTyArg(1, FloatTy))
           .bind("call"),
       this);
 
   // Match calls to scalbln(double, long) where the first arg is a float.
   Finder->addMatcher(
       callExpr(callee(functionDecl(hasName("::scalbln"), parameterCountIs(2),
-                                   hasBuiltinTyParam(0, DoubleTy),
-                                   hasBuiltinTyParam(1, LongTy))),
-               hasBuiltinTyArg(0, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy),
+                                   HasBuiltinTyParam(1, LongTy))),
+               HasBuiltinTyArg(0, FloatTy))
           .bind("call"),
       this);
 
   // Match calls to scalbn(double, int) where the first arg is a float.
   Finder->addMatcher(
       callExpr(callee(functionDecl(hasName("::scalbn"), parameterCountIs(2),
-                                   hasBuiltinTyParam(0, DoubleTy),
-                                   hasBuiltinTyParam(1, IntTy))),
-               hasBuiltinTyArg(0, FloatTy))
+                                   HasBuiltinTyParam(0, DoubleTy),
+                                   HasBuiltinTyParam(1, IntTy))),
+               HasBuiltinTyArg(0, FloatTy))
           .bind("call"),
       this);
 

diff  --git a/clang-tools-extra/clang-tidy/performance/UnnecessaryCopyInitialization.cpp b/clang-tools-extra/clang-tidy/performance/UnnecessaryCopyInitialization.cpp
index 06cfb24de1ea..f63dbab09358 100644
--- a/clang-tools-extra/clang-tidy/performance/UnnecessaryCopyInitialization.cpp
+++ b/clang-tools-extra/clang-tidy/performance/UnnecessaryCopyInitialization.cpp
@@ -127,7 +127,7 @@ UnnecessaryCopyInitialization::UnnecessaryCopyInitialization(
           utils::options::parseStringList(Options.get("AllowedTypes", ""))) {}
 
 void UnnecessaryCopyInitialization::registerMatchers(MatchFinder *Finder) {
-  auto localVarCopiedFrom = [this](const internal::Matcher<Expr> &CopyCtorArg) {
+  auto LocalVarCopiedFrom = [this](const internal::Matcher<Expr> &CopyCtorArg) {
     return compoundStmt(
                forEachDescendant(
                    declStmt(
@@ -153,11 +153,11 @@ void UnnecessaryCopyInitialization::registerMatchers(MatchFinder *Finder) {
         .bind("blockStmt");
   };
 
-  Finder->addMatcher(localVarCopiedFrom(anyOf(isConstRefReturningFunctionCall(),
+  Finder->addMatcher(LocalVarCopiedFrom(anyOf(isConstRefReturningFunctionCall(),
                                               isConstRefReturningMethodCall())),
                      this);
 
-  Finder->addMatcher(localVarCopiedFrom(declRefExpr(
+  Finder->addMatcher(LocalVarCopiedFrom(declRefExpr(
                          to(varDecl(hasLocalStorage()).bind(OldVarDeclId)))),
                      this);
 }
@@ -181,8 +181,8 @@ void UnnecessaryCopyInitialization::check(
   // A constructor that looks like T(const T& t, bool arg = false) counts as a
   // copy only when it is called with default arguments for the arguments after
   // the first.
-  for (unsigned int i = 1; i < CtorCall->getNumArgs(); ++i)
-    if (!CtorCall->getArg(i)->isDefaultArgument())
+  for (unsigned int I = 1; I < CtorCall->getNumArgs(); ++I)
+    if (!CtorCall->getArg(I)->isDefaultArgument())
       return;
 
   if (OldVar == nullptr) {

diff  --git a/clang-tools-extra/clang-tidy/plugin/ClangTidyPlugin.cpp b/clang-tools-extra/clang-tidy/plugin/ClangTidyPlugin.cpp
index cbd6fdd4605c..b8367d6384f2 100644
--- a/clang-tools-extra/clang-tidy/plugin/ClangTidyPlugin.cpp
+++ b/clang-tools-extra/clang-tidy/plugin/ClangTidyPlugin.cpp
@@ -39,9 +39,8 @@ class ClangTidyPluginAction : public PluginASTAction {
   std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &Compiler,
                                                  StringRef File) override {
     // Create and set diagnostics engine
-    auto ExternalDiagEngine = &Compiler.getDiagnostics();
-    auto DiagConsumer =
-        new ClangTidyDiagnosticConsumer(*Context, ExternalDiagEngine);
+    auto *DiagConsumer =
+        new ClangTidyDiagnosticConsumer(*Context, &Compiler.getDiagnostics());
     auto DiagEngine = std::make_unique<DiagnosticsEngine>(
         new DiagnosticIDs, new DiagnosticOptions, DiagConsumer);
     Context->setDiagnosticsEngine(DiagEngine.get());

diff  --git a/clang-tools-extra/clang-tidy/portability/SIMDIntrinsicsCheck.cpp b/clang-tools-extra/clang-tidy/portability/SIMDIntrinsicsCheck.cpp
index 9391670df622..65d7c1746b18 100644
--- a/clang-tools-extra/clang-tidy/portability/SIMDIntrinsicsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/portability/SIMDIntrinsicsCheck.cpp
@@ -39,7 +39,7 @@ AST_MATCHER(FunctionDecl, isVectorFunction) {
 
 } // namespace
 
-static StringRef TrySuggestPPC(StringRef Name) {
+static StringRef trySuggestPpc(StringRef Name) {
   if (!Name.consume_front("vec_"))
     return {};
 
@@ -54,7 +54,7 @@ static StringRef TrySuggestPPC(StringRef Name) {
       .Default({});
 }
 
-static StringRef TrySuggestX86(StringRef Name) {
+static StringRef trySuggestX86(StringRef Name) {
   if (!(Name.consume_front("_mm_") || Name.consume_front("_mm256_") ||
         Name.consume_front("_mm512_")))
     return {};
@@ -120,11 +120,11 @@ void SIMDIntrinsicsCheck::check(const MatchFinder::MatchResult &Result) {
   case llvm::Triple::ppc:
   case llvm::Triple::ppc64:
   case llvm::Triple::ppc64le:
-    New = TrySuggestPPC(Old);
+    New = trySuggestPpc(Old);
     break;
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
-    New = TrySuggestX86(Old);
+    New = trySuggestX86(Old);
     break;
   }
 

diff  --git a/clang-tools-extra/clang-tidy/readability/AvoidConstParamsInDecls.cpp b/clang-tools-extra/clang-tidy/readability/AvoidConstParamsInDecls.cpp
index 91e1495e060c..aed01ab7ae7c 100644
--- a/clang-tools-extra/clang-tidy/readability/AvoidConstParamsInDecls.cpp
+++ b/clang-tools-extra/clang-tidy/readability/AvoidConstParamsInDecls.cpp
@@ -47,7 +47,7 @@ void AvoidConstParamsInDecls::registerMatchers(MatchFinder *Finder) {
 }
 
 // Re-lex the tokens to get precise location of last 'const'
-static llvm::Optional<Token> ConstTok(CharSourceRange Range,
+static llvm::Optional<Token> constTok(CharSourceRange Range,
                                       const MatchFinder::MatchResult &Result) {
   const SourceManager &Sources = *Result.SourceManager;
   std::pair<FileID, unsigned> LocInfo =
@@ -86,9 +86,9 @@ void AvoidConstParamsInDecls::check(const MatchFinder::MatchResult &Result) {
                    "declaration; const-qualification of parameters only has an "
                    "effect in function definitions");
   if (Param->getName().empty()) {
-    for (unsigned int i = 0; i < Func->getNumParams(); ++i) {
-      if (Param == Func->getParamDecl(i)) {
-        Diag << (i + 1);
+    for (unsigned int I = 0; I < Func->getNumParams(); ++I) {
+      if (Param == Func->getParamDecl(I)) {
+        Diag << (I + 1);
         break;
       }
     }
@@ -109,7 +109,7 @@ void AvoidConstParamsInDecls::check(const MatchFinder::MatchResult &Result) {
   if (!FileRange.isValid())
     return;
 
-  auto Tok = ConstTok(FileRange, Result);
+  auto Tok = constTok(FileRange, Result);
   if (!Tok)
     return;
   Diag << FixItHint::CreateRemoval(

diff  --git a/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp b/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
index 64e182bbbbc8..1123238c186b 100644
--- a/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
@@ -139,18 +139,19 @@ void BracesAroundStatementsCheck::check(
   const ASTContext *Context = Result.Context;
 
   // Get location of closing parenthesis or 'do' to insert opening brace.
-  if (auto S = Result.Nodes.getNodeAs<ForStmt>("for")) {
+  if (const auto *S = Result.Nodes.getNodeAs<ForStmt>("for")) {
     checkStmt(Result, S->getBody(), S->getRParenLoc());
-  } else if (auto S = Result.Nodes.getNodeAs<CXXForRangeStmt>("for-range")) {
+  } else if (const auto *S =
+                 Result.Nodes.getNodeAs<CXXForRangeStmt>("for-range")) {
     checkStmt(Result, S->getBody(), S->getRParenLoc());
-  } else if (auto S = Result.Nodes.getNodeAs<DoStmt>("do")) {
+  } else if (const auto *S = Result.Nodes.getNodeAs<DoStmt>("do")) {
     checkStmt(Result, S->getBody(), S->getDoLoc(), S->getWhileLoc());
-  } else if (auto S = Result.Nodes.getNodeAs<WhileStmt>("while")) {
+  } else if (const auto *S = Result.Nodes.getNodeAs<WhileStmt>("while")) {
     SourceLocation StartLoc = findRParenLoc(S, SM, Context);
     if (StartLoc.isInvalid())
       return;
     checkStmt(Result, S->getBody(), StartLoc);
-  } else if (auto S = Result.Nodes.getNodeAs<IfStmt>("if")) {
+  } else if (const auto *S = Result.Nodes.getNodeAs<IfStmt>("if")) {
     SourceLocation StartLoc = findRParenLoc(S, SM, Context);
     if (StartLoc.isInvalid())
       return;

diff  --git a/clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp b/clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp
index 96854bf2a7ab..88a422ab45a3 100644
--- a/clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/FunctionCognitiveComplexityCheck.cpp
@@ -223,14 +223,14 @@ class FunctionASTVisitor final
   std::stack<OBO, SmallVector<OBO, 4>> BinaryOperatorsStack;
 
 public:
-  bool TraverseStmtWithIncreasedNestingLevel(Stmt *Node) {
+  bool traverseStmtWithIncreasedNestingLevel(Stmt *Node) {
     ++CurrentNestingLevel;
     bool ShouldContinue = Base::TraverseStmt(Node);
     --CurrentNestingLevel;
     return ShouldContinue;
   }
 
-  bool TraverseDeclWithIncreasedNestingLevel(Decl *Node) {
+  bool traverseDeclWithIncreasedNestingLevel(Decl *Node) {
     ++CurrentNestingLevel;
     bool ShouldContinue = Base::TraverseDecl(Node);
     --CurrentNestingLevel;
@@ -272,15 +272,15 @@ class FunctionASTVisitor final
       if (!TraverseStmt(Node->getCond()))
         return false;
     } else {
-      if (!TraverseStmtWithIncreasedNestingLevel(Node->getInit()))
+      if (!traverseStmtWithIncreasedNestingLevel(Node->getInit()))
         return false;
 
-      if (!TraverseStmtWithIncreasedNestingLevel(Node->getCond()))
+      if (!traverseStmtWithIncreasedNestingLevel(Node->getCond()))
         return false;
     }
 
     // "Then" always increases nesting level.
-    if (!TraverseStmtWithIncreasedNestingLevel(Node->getThen()))
+    if (!traverseStmtWithIncreasedNestingLevel(Node->getThen()))
       return false;
 
     if (!Node->getElse())
@@ -305,7 +305,7 @@ class FunctionASTVisitor final
     }
 
     // "Else" always increases nesting level.
-    return TraverseStmtWithIncreasedNestingLevel(Node->getElse());
+    return traverseStmtWithIncreasedNestingLevel(Node->getElse());
   }
 
 // The currently-being-processed stack entry, which is always the top.
@@ -447,7 +447,7 @@ class FunctionASTVisitor final
     if (!(Reasons & CognitiveComplexity::Criteria::IncrementNesting))
       return Base::TraverseStmt(Node);
 
-    return TraverseStmtWithIncreasedNestingLevel(Node);
+    return traverseStmtWithIncreasedNestingLevel(Node);
   }
 
   // The parameter MainAnalyzedFunction is needed to 
diff erentiate between the
@@ -481,7 +481,7 @@ class FunctionASTVisitor final
     CC.account(Node->getBeginLoc(), CurrentNestingLevel,
                CognitiveComplexity::Criteria::IncrementNesting);
 
-    return TraverseDeclWithIncreasedNestingLevel(Node);
+    return traverseDeclWithIncreasedNestingLevel(Node);
   }
 
   CognitiveComplexity CC;

diff  --git a/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp b/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
index d33040a00e15..b862efe5f104 100644
--- a/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
@@ -393,12 +393,11 @@ static bool isParamInMainLikeFunction(const ParmVarDecl &ParmDecl,
         "(^[Mm]ain([_A-Z]|$))|([a-z0-9_]Main([_A-Z]|$))|(_main(_|$))");
     assert(Matcher.isValid() && "Invalid Matcher for main like functions.");
     return Matcher.match(FDecl->getName());
-  } else {
-    static llvm::Regex Matcher("(^((W[Mm])|(wm))ain([_A-Z]|$))|([a-z0-9_]W[Mm]"
-                               "ain([_A-Z]|$))|(_wmain(_|$))");
-    assert(Matcher.isValid() && "Invalid Matcher for wmain like functions.");
-    return Matcher.match(FDecl->getName());
   }
+  static llvm::Regex Matcher("(^((W[Mm])|(wm))ain([_A-Z]|$))|([a-z0-9_]W[Mm]"
+                             "ain([_A-Z]|$))|(_wmain(_|$))");
+  assert(Matcher.isValid() && "Invalid Matcher for wmain like functions.");
+  return Matcher.match(FDecl->getName());
 }
 
 static std::string

diff  --git a/clang-tools-extra/clang-tidy/readability/ImplicitBoolConversionCheck.cpp b/clang-tools-extra/clang-tidy/readability/ImplicitBoolConversionCheck.cpp
index 0ff2c066e474..51e3e2c1260b 100644
--- a/clang-tools-extra/clang-tidy/readability/ImplicitBoolConversionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/ImplicitBoolConversionCheck.cpp
@@ -260,21 +260,22 @@ void ImplicitBoolConversionCheck::storeOptions(
 }
 
 void ImplicitBoolConversionCheck::registerMatchers(MatchFinder *Finder) {
-  auto exceptionCases =
+  auto ExceptionCases =
       expr(anyOf(allOf(isMacroExpansion(), unless(isNULLMacroExpansion())),
-                 has(ignoringImplicit(memberExpr(hasDeclaration(fieldDecl(hasBitWidth(1)))))),
+                 has(ignoringImplicit(
+                     memberExpr(hasDeclaration(fieldDecl(hasBitWidth(1)))))),
                  hasParent(explicitCastExpr())));
-  auto implicitCastFromBool = implicitCastExpr(
+  auto ImplicitCastFromBool = implicitCastExpr(
       anyOf(hasCastKind(CK_IntegralCast), hasCastKind(CK_IntegralToFloating),
             // Prior to C++11 cast from bool literal to pointer was allowed.
             allOf(anyOf(hasCastKind(CK_NullToPointer),
                         hasCastKind(CK_NullToMemberPointer)),
                   hasSourceExpression(cxxBoolLiteral()))),
       hasSourceExpression(expr(hasType(booleanType()))),
-      unless(exceptionCases));
-  auto boolXor =
-      binaryOperator(hasOperatorName("^"), hasLHS(implicitCastFromBool),
-                     hasRHS(implicitCastFromBool));
+      unless(ExceptionCases));
+  auto BoolXor =
+      binaryOperator(hasOperatorName("^"), hasLHS(ImplicitCastFromBool),
+                     hasRHS(ImplicitCastFromBool));
   Finder->addMatcher(
       traverse(TK_AsIs,
                implicitCastExpr(
@@ -288,7 +289,7 @@ void ImplicitBoolConversionCheck::registerMatchers(MatchFinder *Finder) {
                    unless(hasParent(
                        stmt(anyOf(ifStmt(), whileStmt()), has(declStmt())))),
                    // Exclude cases common to implicit cast to and from bool.
-                   unless(exceptionCases), unless(has(boolXor)),
+                   unless(ExceptionCases), unless(has(BoolXor)),
                    // Retrieve also parent statement, to check if we need
                    // additional parens in replacement.
                    anyOf(hasParent(stmt().bind("parentStmt")), anything()),
@@ -297,30 +298,30 @@ void ImplicitBoolConversionCheck::registerMatchers(MatchFinder *Finder) {
                    .bind("implicitCastToBool")),
       this);
 
-  auto boolComparison = binaryOperator(hasAnyOperatorName("==", "!="),
-                                       hasLHS(implicitCastFromBool),
-                                       hasRHS(implicitCastFromBool));
-  auto boolOpAssignment = binaryOperator(hasAnyOperatorName("|=", "&="),
+  auto BoolComparison = binaryOperator(hasAnyOperatorName("==", "!="),
+                                       hasLHS(ImplicitCastFromBool),
+                                       hasRHS(ImplicitCastFromBool));
+  auto BoolOpAssignment = binaryOperator(hasAnyOperatorName("|=", "&="),
                                          hasLHS(expr(hasType(booleanType()))));
-  auto bitfieldAssignment = binaryOperator(
+  auto BitfieldAssignment = binaryOperator(
       hasLHS(memberExpr(hasDeclaration(fieldDecl(hasBitWidth(1))))));
-  auto bitfieldConstruct = cxxConstructorDecl(hasDescendant(cxxCtorInitializer(
+  auto BitfieldConstruct = cxxConstructorDecl(hasDescendant(cxxCtorInitializer(
       withInitializer(equalsBoundNode("implicitCastFromBool")),
       forField(hasBitWidth(1)))));
   Finder->addMatcher(
       traverse(
           TK_AsIs,
           implicitCastExpr(
-              implicitCastFromBool,
+              ImplicitCastFromBool,
               // Exclude comparisons of bools, as they are always cast to
               // integers in such context:
               //   bool_expr_a == bool_expr_b
               //   bool_expr_a != bool_expr_b
               unless(hasParent(
-                  binaryOperator(anyOf(boolComparison, boolXor,
-                                       boolOpAssignment, bitfieldAssignment)))),
+                  binaryOperator(anyOf(BoolComparison, BoolXor,
+                                       BoolOpAssignment, BitfieldAssignment)))),
               implicitCastExpr().bind("implicitCastFromBool"),
-              unless(hasParent(bitfieldConstruct)),
+              unless(hasParent(BitfieldConstruct)),
               // Check also for nested casts, for example: bool -> int -> float.
               anyOf(hasParent(implicitCastExpr().bind("furtherImplicitCast")),
                     anything()),

diff  --git a/clang-tools-extra/clang-tidy/readability/MakeMemberFunctionConstCheck.cpp b/clang-tools-extra/clang-tidy/readability/MakeMemberFunctionConstCheck.cpp
index 798343625729..3e5b71fdd56b 100644
--- a/clang-tools-extra/clang-tidy/readability/MakeMemberFunctionConstCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/MakeMemberFunctionConstCheck.cpp
@@ -91,7 +91,7 @@ class FindUsageOfThis : public RecursiveASTVisitor<FindUsageOfThis> {
   //  `-ImplicitCastExpr
   //  (possibly `-UnaryOperator Deref)
   //        `-CXXThisExpr 'S *' this
-  bool VisitUser(const ImplicitCastExpr *Cast) {
+  bool visitUser(const ImplicitCastExpr *Cast) {
     if (Cast->getCastKind() != CK_NoOp)
       return false; // Stop traversal.
 
@@ -115,14 +115,14 @@ class FindUsageOfThis : public RecursiveASTVisitor<FindUsageOfThis> {
 
     // ((const S*)this)->Member
     if (const auto *Member = dyn_cast<MemberExpr>(Parent))
-      return VisitUser(Member, /*OnConstObject=*/true);
+      return visitUser(Member, /*OnConstObject=*/true);
 
     return false; // Stop traversal.
   }
 
   // If OnConstObject is true, then this is a MemberExpr using
   // a constant this, i.e. 'const S' or 'const S *'.
-  bool VisitUser(const MemberExpr *Member, bool OnConstObject) {
+  bool visitUser(const MemberExpr *Member, bool OnConstObject) {
     if (Member->isBoundMemberFunction(Ctxt)) {
       if (!OnConstObject || Member->getFoundDecl().getAccess() != AS_public) {
         // Non-public non-static member functions might not preserve the
@@ -159,7 +159,7 @@ class FindUsageOfThis : public RecursiveASTVisitor<FindUsageOfThis> {
     }
 
     if (const auto *M = dyn_cast_or_null<MemberExpr>(Parent))
-      return VisitUser(M, /*OnConstObject=*/false);
+      return visitUser(M, /*OnConstObject=*/false);
 
     return false; // Stop traversal.
   }
@@ -182,7 +182,7 @@ class FindUsageOfThis : public RecursiveASTVisitor<FindUsageOfThis> {
     //  ((const S*)this)->f()
     // when 'f' is a public member function.
     if (const auto *Cast = dyn_cast_or_null<ImplicitCastExpr>(Parent)) {
-      if (VisitUser(Cast))
+      if (visitUser(Cast))
         return true;
 
       // And it's also okay to
@@ -190,7 +190,7 @@ class FindUsageOfThis : public RecursiveASTVisitor<FindUsageOfThis> {
       //   (LValueToRValue)(S->t)
       // when 't' is either of builtin type or a public member.
     } else if (const auto *Member = dyn_cast_or_null<MemberExpr>(Parent)) {
-      if (VisitUser(Member, /*OnConstObject=*/false))
+      if (visitUser(Member, /*OnConstObject=*/false))
         return true;
     }
 
@@ -248,7 +248,7 @@ void MakeMemberFunctionConstCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *Definition = Result.Nodes.getNodeAs<CXXMethodDecl>("x");
 
-  auto Declaration = Definition->getCanonicalDecl();
+  const auto *Declaration = Definition->getCanonicalDecl();
 
   auto Diag = diag(Definition->getLocation(), "method %0 can be made const")
               << Definition

diff  --git a/clang-tools-extra/clang-tidy/readability/MisleadingIndentationCheck.cpp b/clang-tools-extra/clang-tidy/readability/MisleadingIndentationCheck.cpp
index 3167d159b74f..77f93f1999a9 100644
--- a/clang-tools-extra/clang-tidy/readability/MisleadingIndentationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/MisleadingIndentationCheck.cpp
@@ -18,10 +18,10 @@ namespace readability {
 
 static const IfStmt *getPrecedingIf(const SourceManager &SM,
                                     ASTContext *Context, const IfStmt *If) {
-  auto parents = Context->getParents(*If);
-  if (parents.size() != 1)
+  auto Parents = Context->getParents(*If);
+  if (Parents.size() != 1)
     return nullptr;
-  if (const auto *PrecedingIf = parents[0].get<IfStmt>()) {
+  if (const auto *PrecedingIf = Parents[0].get<IfStmt>()) {
     SourceLocation PreviousElseLoc = PrecedingIf->getElseLoc();
     if (SM.getExpansionLineNumber(PreviousElseLoc) ==
         SM.getExpansionLineNumber(If->getIfLoc()))
@@ -44,7 +44,7 @@ void MisleadingIndentationCheck::danglingElseCheck(const SourceManager &SM,
     return;
 
   // Find location of first 'if' in a 'if else if' chain.
-  for (auto PrecedingIf = getPrecedingIf(SM, Context, If); PrecedingIf;
+  for (const auto *PrecedingIf = getPrecedingIf(SM, Context, If); PrecedingIf;
        PrecedingIf = getPrecedingIf(SM, Context, PrecedingIf))
     IfLoc = PrecedingIf->getIfLoc();
 
@@ -56,8 +56,8 @@ void MisleadingIndentationCheck::danglingElseCheck(const SourceManager &SM,
 void MisleadingIndentationCheck::missingBracesCheck(const SourceManager &SM,
                                                     const CompoundStmt *CStmt) {
   const static StringRef StmtNames[] = {"if", "for", "while"};
-  for (unsigned int i = 0; i < CStmt->size() - 1; i++) {
-    const Stmt *CurrentStmt = CStmt->body_begin()[i];
+  for (unsigned int I = 0; I < CStmt->size() - 1; I++) {
+    const Stmt *CurrentStmt = CStmt->body_begin()[I];
     const Stmt *Inner = nullptr;
     int StmtKind = 0;
 
@@ -89,7 +89,7 @@ void MisleadingIndentationCheck::missingBracesCheck(const SourceManager &SM,
         SM.getExpansionLineNumber(OuterLoc))
       continue;
 
-    const Stmt *NextStmt = CStmt->body_begin()[i + 1];
+    const Stmt *NextStmt = CStmt->body_begin()[I + 1];
     SourceLocation NextLoc = NextStmt->getBeginLoc();
 
     if (NextLoc.isInvalid() || NextLoc.isMacroID())

diff  --git a/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.cpp b/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.cpp
index 09b03fe79f13..5e018ce6172c 100644
--- a/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/NamedParameterCheck.cpp
@@ -62,7 +62,7 @@ void NamedParameterCheck::check(const MatchFinder::MatchResult &Result) {
       continue;
 
     // Skip gmock testing::Unused parameters.
-    if (auto Typedef = Parm->getType()->getAs<clang::TypedefType>())
+    if (const auto *Typedef = Parm->getType()->getAs<clang::TypedefType>())
       if (Typedef->getDecl()->getQualifiedNameAsString() == "testing::Unused")
         continue;
 

diff  --git a/clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp b/clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp
index 003c05f865ad..bd1d8c30bc90 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/RedundantControlFlowCheck.cpp
@@ -55,16 +55,16 @@ void RedundantControlFlowCheck::check(const MatchFinder::MatchResult &Result) {
 
 void RedundantControlFlowCheck::checkRedundantReturn(
     const MatchFinder::MatchResult &Result, const CompoundStmt *Block) {
-  CompoundStmt::const_reverse_body_iterator last = Block->body_rbegin();
-  if (const auto *Return = dyn_cast<ReturnStmt>(*last))
+  CompoundStmt::const_reverse_body_iterator Last = Block->body_rbegin();
+  if (const auto *Return = dyn_cast<ReturnStmt>(*Last))
     issueDiagnostic(Result, Block, Return->getSourceRange(),
                     RedundantReturnDiag);
 }
 
 void RedundantControlFlowCheck::checkRedundantContinue(
     const MatchFinder::MatchResult &Result, const CompoundStmt *Block) {
-  CompoundStmt::const_reverse_body_iterator last = Block->body_rbegin();
-  if (const auto *Continue = dyn_cast<ContinueStmt>(*last))
+  CompoundStmt::const_reverse_body_iterator Last = Block->body_rbegin();
+  if (const auto *Continue = dyn_cast<ContinueStmt>(*Last))
     issueDiagnostic(Result, Block, Continue->getSourceRange(),
                     RedundantContinueDiag);
 }

diff  --git a/clang-tools-extra/clang-tidy/readability/RedundantDeclarationCheck.cpp b/clang-tools-extra/clang-tidy/readability/RedundantDeclarationCheck.cpp
index f673dad9ed06..dfe3fbc96bf1 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantDeclarationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/RedundantDeclarationCheck.cpp
@@ -68,7 +68,7 @@ void RedundantDeclarationCheck::check(const MatchFinder::MatchResult &Result) {
   bool MultiVar = false;
   if (const auto *VD = dyn_cast<VarDecl>(D)) {
     // Is this a multivariable declaration?
-    for (const auto Other : VD->getDeclContext()->decls()) {
+    for (const auto *Other : VD->getDeclContext()->decls()) {
       if (Other != D && Other->getBeginLoc() == VD->getBeginLoc()) {
         MultiVar = true;
         break;

diff  --git a/clang-tools-extra/clang-tidy/readability/RedundantPreprocessorCheck.cpp b/clang-tools-extra/clang-tidy/readability/RedundantPreprocessorCheck.cpp
index 822c4cd14ddc..46dd82bd118d 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantPreprocessorCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/RedundantPreprocessorCheck.cpp
@@ -40,23 +40,23 @@ class RedundantPreprocessorCallbacks : public PPCallbacks {
     StringRef Condition =
         Lexer::getSourceText(CharSourceRange::getTokenRange(ConditionRange),
                              PP.getSourceManager(), PP.getLangOpts());
-    CheckMacroRedundancy(Loc, Condition, IfStack, DK_If, DK_If, true);
+    checkMacroRedundancy(Loc, Condition, IfStack, DK_If, DK_If, true);
   }
 
   void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
              const MacroDefinition &MacroDefinition) override {
     std::string MacroName = PP.getSpelling(MacroNameTok);
-    CheckMacroRedundancy(Loc, MacroName, IfdefStack, DK_Ifdef, DK_Ifdef, true);
-    CheckMacroRedundancy(Loc, MacroName, IfndefStack, DK_Ifdef, DK_Ifndef,
+    checkMacroRedundancy(Loc, MacroName, IfdefStack, DK_Ifdef, DK_Ifdef, true);
+    checkMacroRedundancy(Loc, MacroName, IfndefStack, DK_Ifdef, DK_Ifndef,
                          false);
   }
 
   void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
               const MacroDefinition &MacroDefinition) override {
     std::string MacroName = PP.getSpelling(MacroNameTok);
-    CheckMacroRedundancy(Loc, MacroName, IfndefStack, DK_Ifndef, DK_Ifndef,
+    checkMacroRedundancy(Loc, MacroName, IfndefStack, DK_Ifndef, DK_Ifndef,
                          true);
-    CheckMacroRedundancy(Loc, MacroName, IfdefStack, DK_Ifndef, DK_Ifdef,
+    checkMacroRedundancy(Loc, MacroName, IfdefStack, DK_Ifndef, DK_Ifdef,
                          false);
   }
 
@@ -70,7 +70,7 @@ class RedundantPreprocessorCallbacks : public PPCallbacks {
   }
 
 private:
-  void CheckMacroRedundancy(SourceLocation Loc, StringRef MacroName,
+  void checkMacroRedundancy(SourceLocation Loc, StringRef MacroName,
                             SmallVector<PreprocessorEntry, 4> &Stack,
                             DirectiveKind WarningKind, DirectiveKind NoteKind,
                             bool Store) {

diff  --git a/clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp b/clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
index 26c8ae5a3244..7a37630433fe 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/RedundantStringInitCheck.cpp
@@ -72,18 +72,18 @@ void RedundantStringInitCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
 }
 
 void RedundantStringInitCheck::registerMatchers(MatchFinder *Finder) {
-  const auto hasStringTypeName = hasAnyNameStdString(StringNames);
-  const auto hasStringCtorName =
+  const auto HasStringTypeName = hasAnyNameStdString(StringNames);
+  const auto HasStringCtorName =
       hasAnyNameStdString(removeNamespaces(StringNames));
 
   // Match string constructor.
   const auto StringConstructorExpr = expr(
       anyOf(cxxConstructExpr(argumentCountIs(1),
-                             hasDeclaration(cxxMethodDecl(hasStringCtorName))),
+                             hasDeclaration(cxxMethodDecl(HasStringCtorName))),
             // If present, the second argument is the alloc object which must
             // not be present explicitly.
             cxxConstructExpr(argumentCountIs(2),
-                             hasDeclaration(cxxMethodDecl(hasStringCtorName)),
+                             hasDeclaration(cxxMethodDecl(HasStringCtorName)),
                              hasArgument(1, cxxDefaultArgExpr()))));
 
   // Match a string constructor expression with an empty string literal.
@@ -96,7 +96,7 @@ void RedundantStringInitCheck::registerMatchers(MatchFinder *Finder) {
                        hasArgument(0, ignoringImplicit(EmptyStringCtorExpr)));
 
   const auto StringType = hasType(hasUnqualifiedDesugaredType(
-      recordType(hasDeclaration(cxxRecordDecl(hasStringTypeName)))));
+      recordType(hasDeclaration(cxxRecordDecl(HasStringTypeName)))));
   const auto EmptyStringInit = traverse(
       TK_AsIs, expr(ignoringImplicit(anyOf(
                    EmptyStringCtorExpr, EmptyStringCtorExprWithTemporaries))));

diff  --git a/clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp b/clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp
index 7e8ba4eb90c6..d450df55c6a0 100644
--- a/clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/SimplifyBooleanExprCheck.cpp
@@ -139,11 +139,11 @@ StringRef negatedOperator(const CXXOperatorCallExpr *OpCall) {
   return StringRef();
 }
 
-std::string asBool(StringRef text, bool NeedsStaticCast) {
+std::string asBool(StringRef Text, bool NeedsStaticCast) {
   if (NeedsStaticCast)
-    return ("static_cast<bool>(" + text + ")").str();
+    return ("static_cast<bool>(" + Text + ")").str();
 
-  return std::string(text);
+  return std::string(Text);
 }
 
 bool needsNullPtrComparison(const Expr *E) {
@@ -398,8 +398,8 @@ void SimplifyBooleanExprCheck::reportBinOp(
 
   bool BoolValue = Bool->getValue();
 
-  auto replaceWithExpression = [this, &Result, LHS, RHS, Bool](
-                                   const Expr *ReplaceWith, bool Negated) {
+  auto ReplaceWithExpression = [this, &Result, LHS, RHS,
+                                Bool](const Expr *ReplaceWith, bool Negated) {
     std::string Replacement =
         replacementExpression(Result, Negated, ReplaceWith);
     SourceRange Range(LHS->getBeginLoc(), RHS->getEndLoc());
@@ -411,28 +411,28 @@ void SimplifyBooleanExprCheck::reportBinOp(
     case BO_LAnd:
       if (BoolValue) {
         // expr && true -> expr
-        replaceWithExpression(Other, /*Negated=*/false);
+        ReplaceWithExpression(Other, /*Negated=*/false);
       } else {
         // expr && false -> false
-        replaceWithExpression(Bool, /*Negated=*/false);
+        ReplaceWithExpression(Bool, /*Negated=*/false);
       }
       break;
     case BO_LOr:
       if (BoolValue) {
         // expr || true -> true
-        replaceWithExpression(Bool, /*Negated=*/false);
+        ReplaceWithExpression(Bool, /*Negated=*/false);
       } else {
         // expr || false -> expr
-        replaceWithExpression(Other, /*Negated=*/false);
+        ReplaceWithExpression(Other, /*Negated=*/false);
       }
       break;
     case BO_EQ:
       // expr == true -> expr, expr == false -> !expr
-      replaceWithExpression(Other, /*Negated=*/!BoolValue);
+      ReplaceWithExpression(Other, /*Negated=*/!BoolValue);
       break;
     case BO_NE:
       // expr != true -> !expr, expr != false -> expr
-      replaceWithExpression(Other, /*Negated=*/BoolValue);
+      ReplaceWithExpression(Other, /*Negated=*/BoolValue);
       break;
     default:
       break;

diff  --git a/clang-tools-extra/clang-tidy/readability/SimplifySubscriptExprCheck.cpp b/clang-tools-extra/clang-tidy/readability/SimplifySubscriptExprCheck.cpp
index 3dd646b2edd4..2d14b49e0eea 100644
--- a/clang-tools-extra/clang-tidy/readability/SimplifySubscriptExprCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/SimplifySubscriptExprCheck.cpp
@@ -17,13 +17,13 @@ namespace clang {
 namespace tidy {
 namespace readability {
 
-static const char kDefaultTypes[] =
+static const char KDefaultTypes[] =
     "::std::basic_string;::std::basic_string_view;::std::vector;::std::array";
 
 SimplifySubscriptExprCheck::SimplifySubscriptExprCheck(
     StringRef Name, ClangTidyContext *Context)
     : ClangTidyCheck(Name, Context), Types(utils::options::parseStringList(
-                                         Options.get("Types", kDefaultTypes))) {
+                                         Options.get("Types", KDefaultTypes))) {
 }
 
 void SimplifySubscriptExprCheck::registerMatchers(MatchFinder *Finder) {

diff  --git a/clang-tools-extra/clang-tidy/readability/UppercaseLiteralSuffixCheck.cpp b/clang-tools-extra/clang-tidy/readability/UppercaseLiteralSuffixCheck.cpp
index eef6253f6a1f..c4fbeeb4777a 100644
--- a/clang-tools-extra/clang-tidy/readability/UppercaseLiteralSuffixCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/UppercaseLiteralSuffixCheck.cpp
@@ -62,7 +62,7 @@ struct NewSuffix {
   llvm::Optional<FixItHint> FixIt;
 };
 
-llvm::Optional<SourceLocation> GetMacroAwareLocation(SourceLocation Loc,
+llvm::Optional<SourceLocation> getMacroAwareLocation(SourceLocation Loc,
                                                      const SourceManager &SM) {
   // Do nothing if the provided location is invalid.
   if (Loc.isInvalid())
@@ -74,11 +74,11 @@ llvm::Optional<SourceLocation> GetMacroAwareLocation(SourceLocation Loc,
   return SpellingLoc;
 }
 
-llvm::Optional<SourceRange> GetMacroAwareSourceRange(SourceRange Loc,
+llvm::Optional<SourceRange> getMacroAwareSourceRange(SourceRange Loc,
                                                      const SourceManager &SM) {
   llvm::Optional<SourceLocation> Begin =
-      GetMacroAwareLocation(Loc.getBegin(), SM);
-  llvm::Optional<SourceLocation> End = GetMacroAwareLocation(Loc.getEnd(), SM);
+      getMacroAwareLocation(Loc.getBegin(), SM);
+  llvm::Optional<SourceLocation> End = getMacroAwareLocation(Loc.getEnd(), SM);
   if (!Begin || !End)
     return llvm::None;
   return SourceRange(*Begin, *End);
@@ -120,7 +120,7 @@ shouldReplaceLiteralSuffix(const Expr &Literal,
 
   // The literal may have macro expansion, we need the final expanded src range.
   llvm::Optional<SourceRange> Range =
-      GetMacroAwareSourceRange(ReplacementDsc.LiteralLocation, SM);
+      getMacroAwareSourceRange(ReplacementDsc.LiteralLocation, SM);
   if (!Range)
     return llvm::None;
 

diff  --git a/clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp b/clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp
index 165acd40841f..6e837509708b 100644
--- a/clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/UseAnyOfAllOfCheck.cpp
@@ -42,32 +42,32 @@ namespace tidy {
 namespace readability {
 
 void UseAnyOfAllOfCheck::registerMatchers(MatchFinder *Finder) {
-  auto returns = [](bool V) {
+  auto Returns = [](bool V) {
     return returnStmt(hasReturnValue(cxxBoolLiteral(equals(V))));
   };
 
-  auto returnsButNotTrue =
+  auto ReturnsButNotTrue =
       returnStmt(hasReturnValue(unless(cxxBoolLiteral(equals(true)))));
-  auto returnsButNotFalse =
+  auto ReturnsButNotFalse =
       returnStmt(hasReturnValue(unless(cxxBoolLiteral(equals(false)))));
 
   Finder->addMatcher(
       cxxForRangeStmt(
-          nextStmt(returns(false).bind("final_return")),
-          hasBody(allOf(hasDescendant(returns(true)),
+          nextStmt(Returns(false).bind("final_return")),
+          hasBody(allOf(hasDescendant(Returns(true)),
                         unless(anyOf(hasDescendant(breakStmt()),
                                      hasDescendant(gotoStmt()),
-                                     hasDescendant(returnsButNotTrue))))))
+                                     hasDescendant(ReturnsButNotTrue))))))
           .bind("any_of_loop"),
       this);
 
   Finder->addMatcher(
       cxxForRangeStmt(
-          nextStmt(returns(true).bind("final_return")),
-          hasBody(allOf(hasDescendant(returns(false)),
+          nextStmt(Returns(true).bind("final_return")),
+          hasBody(allOf(hasDescendant(Returns(false)),
                         unless(anyOf(hasDescendant(breakStmt()),
                                      hasDescendant(gotoStmt()),
-                                     hasDescendant(returnsButNotFalse))))))
+                                     hasDescendant(ReturnsButNotFalse))))))
           .bind("all_of_loop"),
       this);
 }

diff  --git a/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp b/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
index 9b8eca137c3a..dae750385641 100644
--- a/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
+++ b/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
@@ -25,14 +25,12 @@ const FunctionDecl *getSurroundingFunction(ASTContext &Context,
 }
 
 bool IsBinaryOrTernary(const Expr *E) {
-  const Expr *E_base = E->IgnoreImpCasts();
-  if (clang::isa<clang::BinaryOperator>(E_base) ||
-      clang::isa<clang::ConditionalOperator>(E_base)) {
+  const Expr *EBase = E->IgnoreImpCasts();
+  if (isa<BinaryOperator>(EBase) || isa<ConditionalOperator>(EBase)) {
     return true;
   }
 
-  if (const auto *Operator =
-          clang::dyn_cast<clang::CXXOperatorCallExpr>(E_base)) {
+  if (const auto *Operator = dyn_cast<CXXOperatorCallExpr>(EBase)) {
     return Operator->isInfixBinaryOp();
   }
 
@@ -56,7 +54,7 @@ bool exprHasBitFlagWithSpelling(const Expr *Flags, const SourceManager &SM,
   }
   // If it's a binary OR operation.
   if (const auto *BO = dyn_cast<BinaryOperator>(Flags))
-    if (BO->getOpcode() == clang::BinaryOperatorKind::BO_Or)
+    if (BO->getOpcode() == BinaryOperatorKind::BO_Or)
       return exprHasBitFlagWithSpelling(BO->getLHS()->IgnoreParenCasts(), SM,
                                         LangOpts, FlagName) ||
              exprHasBitFlagWithSpelling(BO->getRHS()->IgnoreParenCasts(), SM,

diff  --git a/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.cpp b/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.cpp
index 1e544f4f1b33..97895115a7d5 100644
--- a/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.cpp
+++ b/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.cpp
@@ -158,8 +158,8 @@ ExceptionAnalyzer::ExceptionInfo ExceptionAnalyzer::throwsException(
   } else if (const auto *Try = dyn_cast<CXXTryStmt>(St)) {
     ExceptionInfo Uncaught =
         throwsException(Try->getTryBlock(), Caught, CallStack);
-    for (unsigned i = 0; i < Try->getNumHandlers(); ++i) {
-      const CXXCatchStmt *Catch = Try->getHandler(i);
+    for (unsigned I = 0; I < Try->getNumHandlers(); ++I) {
+      const CXXCatchStmt *Catch = Try->getHandler(I);
 
       // Everything is catched through 'catch(...)'.
       if (!Catch->getExceptionDecl()) {

diff  --git a/clang-tools-extra/clang-tidy/utils/ExprSequence.cpp b/clang-tools-extra/clang-tidy/utils/ExprSequence.cpp
index 76e40a3e1d56..1d7c11f20361 100644
--- a/clang-tools-extra/clang-tidy/utils/ExprSequence.cpp
+++ b/clang-tools-extra/clang-tidy/utils/ExprSequence.cpp
@@ -61,7 +61,7 @@ bool isDescendantOrEqual(const Stmt *Descendant, const Stmt *Ancestor,
 
   return false;
 }
-}
+} // namespace
 
 ExprSequence::ExprSequence(const CFG *TheCFG, const Stmt *Root,
                            ASTContext *TheContext)

diff  --git a/clang-tools-extra/clang-tidy/utils/IncludeSorter.cpp b/clang-tools-extra/clang-tidy/utils/IncludeSorter.cpp
index 56c5bcae64ba..de75148d127a 100644
--- a/clang-tools-extra/clang-tidy/utils/IncludeSorter.cpp
+++ b/clang-tools-extra/clang-tidy/utils/IncludeSorter.cpp
@@ -17,7 +17,7 @@ namespace utils {
 
 namespace {
 
-StringRef RemoveFirstSuffix(StringRef Str, ArrayRef<const char *> Suffixes) {
+StringRef removeFirstSuffix(StringRef Str, ArrayRef<const char *> Suffixes) {
   for (StringRef Suffix : Suffixes) {
     if (Str.endswith(Suffix)) {
       return Str.substr(0, Str.size() - Suffix.size());
@@ -26,7 +26,7 @@ StringRef RemoveFirstSuffix(StringRef Str, ArrayRef<const char *> Suffixes) {
   return Str;
 }
 
-StringRef MakeCanonicalName(StringRef Str, IncludeSorter::IncludeStyle Style) {
+StringRef makeCanonicalName(StringRef Str, IncludeSorter::IncludeStyle Style) {
   // The list of suffixes to remove from source file names to get the
   // "canonical" file names.
   // E.g. tools/sort_includes.cc and tools/sort_includes_test.cc
@@ -34,12 +34,12 @@ StringRef MakeCanonicalName(StringRef Str, IncludeSorter::IncludeStyle Style) {
   // (once canonicalized) will match as being the main include file associated
   // with the source files.
   if (Style == IncludeSorter::IS_LLVM) {
-    return RemoveFirstSuffix(
-        RemoveFirstSuffix(Str, {".cc", ".cpp", ".c", ".h", ".hpp"}), {"Test"});
+    return removeFirstSuffix(
+        removeFirstSuffix(Str, {".cc", ".cpp", ".c", ".h", ".hpp"}), {"Test"});
   }
   if (Style == IncludeSorter::IS_Google_ObjC) {
     StringRef Canonical =
-        RemoveFirstSuffix(RemoveFirstSuffix(Str, {".cc", ".cpp", ".c", ".h",
+        removeFirstSuffix(removeFirstSuffix(Str, {".cc", ".cpp", ".c", ".h",
                                                   ".hpp", ".mm", ".m"}),
                           {"_unittest", "_regtest", "_test", "Test"});
 
@@ -52,19 +52,19 @@ StringRef MakeCanonicalName(StringRef Str, IncludeSorter::IncludeStyle Style) {
     return Canonical.substr(
         0, Canonical.find_first_of('+', StartIndex));
   }
-  return RemoveFirstSuffix(
-      RemoveFirstSuffix(Str, {".cc", ".cpp", ".c", ".h", ".hpp"}),
+  return removeFirstSuffix(
+      removeFirstSuffix(Str, {".cc", ".cpp", ".c", ".h", ".hpp"}),
       {"_unittest", "_regtest", "_test"});
 }
 
 // Scan to the end of the line and return the offset of the next line.
-size_t FindNextLine(const char *Text) {
+size_t findNextLine(const char *Text) {
   size_t EOLIndex = std::strcspn(Text, "\n");
   return Text[EOLIndex] == '\0' ? EOLIndex : EOLIndex + 1;
 }
 
 IncludeSorter::IncludeKinds
-DetermineIncludeKind(StringRef CanonicalFile, StringRef IncludeFile,
+determineIncludeKind(StringRef CanonicalFile, StringRef IncludeFile,
                      bool IsAngled, IncludeSorter::IncludeStyle Style) {
   // Compute the two "canonical" forms of the include's filename sans extension.
   // The first form is the include's filename without ".h" or "-inl.h" at the
@@ -76,7 +76,7 @@ DetermineIncludeKind(StringRef CanonicalFile, StringRef IncludeFile,
     return IncludeFile.endswith(".h") ? IncludeSorter::IK_CSystemInclude
                                       : IncludeSorter::IK_CXXSystemInclude;
   }
-  StringRef CanonicalInclude = MakeCanonicalName(IncludeFile, Style);
+  StringRef CanonicalInclude = makeCanonicalName(IncludeFile, Style);
   if (CanonicalFile.endswith(CanonicalInclude)
       || CanonicalInclude.endswith(CanonicalFile)) {
     return IncludeSorter::IK_MainTUInclude;
@@ -127,12 +127,12 @@ IncludeSorter::IncludeSorter(const SourceManager *SourceMgr,
                              const FileID FileID, StringRef FileName,
                              IncludeStyle Style)
     : SourceMgr(SourceMgr), Style(Style), CurrentFileID(FileID),
-      CanonicalFile(MakeCanonicalName(FileName, Style)) {}
+      CanonicalFile(makeCanonicalName(FileName, Style)) {}
 
 void IncludeSorter::AddInclude(StringRef FileName, bool IsAngled,
                                SourceLocation HashLocation,
                                SourceLocation EndLocation) {
-  int Offset = FindNextLine(SourceMgr->getCharacterData(EndLocation));
+  int Offset = findNextLine(SourceMgr->getCharacterData(EndLocation));
 
   // Record the relevant location information for this inclusion directive.
   IncludeLocations[FileName].push_back(
@@ -145,7 +145,7 @@ void IncludeSorter::AddInclude(StringRef FileName, bool IsAngled,
 
   // Add the included file's name to the appropriate bucket.
   IncludeKinds Kind =
-      DetermineIncludeKind(CanonicalFile, FileName, IsAngled, Style);
+      determineIncludeKind(CanonicalFile, FileName, IsAngled, Style);
   if (Kind != IK_InvalidInclude)
     IncludeBucket[Kind].push_back(FileName.str());
 }
@@ -171,14 +171,15 @@ Optional<FixItHint> IncludeSorter::CreateIncludeInsertion(StringRef FileName,
   }
 
   auto IncludeKind =
-      DetermineIncludeKind(CanonicalFile, FileName, IsAngled, Style);
+      determineIncludeKind(CanonicalFile, FileName, IsAngled, Style);
 
   if (!IncludeBucket[IncludeKind].empty()) {
     for (const std::string &IncludeEntry : IncludeBucket[IncludeKind]) {
       if (compareHeaders(FileName, IncludeEntry, Style) < 0) {
         const auto &Location = IncludeLocations[IncludeEntry][0];
         return FixItHint::CreateInsertion(Location.getBegin(), IncludeStmt);
-      } else if (FileName == IncludeEntry) {
+      }
+      if (FileName == IncludeEntry) {
         return llvm::None;
       }
     }
@@ -195,9 +196,9 @@ Optional<FixItHint> IncludeSorter::CreateIncludeInsertion(StringRef FileName,
   // include bucket in the file. In that case, we'll want to sort the include
   // before that bucket.
   IncludeKinds NonEmptyKind = IK_InvalidInclude;
-  for (int i = IK_InvalidInclude - 1; i >= 0; --i) {
-    if (!IncludeBucket[i].empty()) {
-      NonEmptyKind = static_cast<IncludeKinds>(i);
+  for (int I = IK_InvalidInclude - 1; I >= 0; --I) {
+    if (!IncludeBucket[I].empty()) {
+      NonEmptyKind = static_cast<IncludeKinds>(I);
       if (NonEmptyKind < IncludeKind)
         break;
     }


        


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