diff --git a/clang/lib/Format/ContinuationIndenter.cpp b/clang/lib/Format/ContinuationIndenter.cpp
index b23eb549650a7e..386235de1f8f04 100644
--- a/clang/lib/Format/ContinuationIndenter.cpp
+++ b/clang/lib/Format/ContinuationIndenter.cpp
@@ -430,11 +430,11 @@ bool ContinuationIndenter::mustBreak(const LineState &State) {
     return true;
   }
 
-  if (Current.is(TT_ObjCMethodExpr) && !Previous.is(TT_SelectorName) &&
+  if (Current.is(TT_ObjCMethodExpr) && Previous.isNot(TT_SelectorName) &&
       State.Line->startsWith(TT_ObjCMethodSpecifier)) {
     return true;
   }
-  if (Current.is(TT_SelectorName) && !Previous.is(tok::at) &&
+  if (Current.is(TT_SelectorName) && Previous.isNot(tok::at) &&
       CurrentState.ObjCSelectorNameFound && CurrentState.BreakBeforeParameter &&
       (Style.ObjCBreakBeforeNestedBlockParam ||
        !Current.startsSequence(TT_SelectorName, tok::colon, tok::caret))) {
@@ -469,7 +469,7 @@ bool ContinuationIndenter::mustBreak(const LineState &State) {
     return true;
   }
 
-  if (!State.Line->First->is(tok::kw_enum) && State.Column <= NewLineColumn)
+  if (State.Line->First->isNot(tok::kw_enum) && State.Column <= NewLineColumn)
     return false;
 
   if (Style.AlwaysBreakBeforeMultilineStrings &&
@@ -578,8 +578,8 @@ bool ContinuationIndenter::mustBreak(const LineState &State) {
         // Don't always break between a JavaScript `function` and the function
         // name.
         !Style.isJavaScript()) ||
-       (Current.is(tok::kw_operator) && !Previous.is(tok::coloncolon))) &&
-      !Previous.is(tok::kw_template) && CurrentState.BreakBeforeParameter) {
+       (Current.is(tok::kw_operator) && Previous.isNot(tok::coloncolon))) &&
+      Previous.isNot(tok::kw_template) && CurrentState.BreakBeforeParameter) {
     return true;
   }
 
@@ -815,7 +815,7 @@ void ContinuationIndenter::addTokenOnCurrentLine(LineState &State, bool DryRun,
   // Exclude relational operators, as there, it is always more desirable to
   // have the LHS 'left' of the RHS.
   const FormatToken *P = Current.getPreviousNonComment();
-  if (!Current.is(tok::comment) && P &&
+  if (Current.isNot(tok::comment) && P &&
       (P->isOneOf(TT_BinaryOperator, tok::comma) ||
        (P->is(TT_ConditionalExpr) && P->is(tok::colon))) &&
       !P->isOneOf(TT_OverloadedOperator, TT_CtorInitializerComma) &&
@@ -830,8 +830,8 @@ void ContinuationIndenter::addTokenOnCurrentLine(LineState &State, bool DryRun,
     // Don't do this if there are only two operands. In these cases, there is
     // always a nice vertical separation between them and the extra line break
     // does not help.
-    bool HasTwoOperands =
-        P->OperatorIndex == 0 && !P->NextOperator && !P->is(TT_ConditionalExpr);
+    bool HasTwoOperands = P->OperatorIndex == 0 && !P->NextOperator &&
+                          P->isNot(TT_ConditionalExpr);
     if ((!BreakBeforeOperator &&
          !(HasTwoOperands &&
            Style.AlignOperands != FormatStyle::OAS_DontAlign)) ||
@@ -850,7 +850,7 @@ void ContinuationIndenter::addTokenOnCurrentLine(LineState &State, bool DryRun,
     CurrentState.NestedBlockIndent = State.Column;
   } else if (!Current.isOneOf(tok::comment, tok::caret) &&
              ((Previous.is(tok::comma) &&
-               !Previous.is(TT_OverloadedOperator)) ||
+               Previous.isNot(TT_OverloadedOperator)) ||
               (Previous.is(tok::colon) && Previous.is(TT_ObjCMethodExpr)))) {
     CurrentState.LastSpace = State.Column;
   } else if (Previous.is(TT_CtorInitializerColon) &&
@@ -952,9 +952,9 @@ unsigned ContinuationIndenter::addTokenOnNewLine(LineState &State,
   //
   // is common and should be formatted like a free-standing function. The same
   // goes for wrapping before the lambda return type arrow.
-  if (!Current.is(TT_LambdaArrow) &&
+  if (Current.isNot(TT_LambdaArrow) &&
       (!Style.isJavaScript() || Current.NestingLevel != 0 ||
-       !PreviousNonComment || !PreviousNonComment->is(tok::equal) ||
+       !PreviousNonComment || PreviousNonComment->isNot(tok::equal) ||
        !Current.isOneOf(Keywords.kw_async, Keywords.kw_function))) {
     CurrentState.NestedBlockIndent = State.Column;
   }
@@ -1418,7 +1418,7 @@ unsigned ContinuationIndenter::moveStateToNextToken(LineState &State,
   if (Current.is(TT_BinaryOperator) && Current.isNot(tok::lessless))
     CurrentState.LastOperatorWrapped = Newline;
   if (Current.is(TT_ConditionalExpr) && Current.Previous &&
-      !Current.Previous->is(TT_ConditionalExpr)) {
+      Current.Previous->isNot(TT_ConditionalExpr)) {
     CurrentState.LastOperatorWrapped = Newline;
   }
   if (Current.is(TT_ArraySubscriptLSquare) &&
@@ -1447,7 +1447,7 @@ unsigned ContinuationIndenter::moveStateToNextToken(LineState &State,
       CurrentState.QuestionColumn = State.Column;
   }
   if (!Current.opensScope() && !Current.closesScope() &&
-      !Current.is(TT_PointerOrReference)) {
+      Current.isNot(TT_PointerOrReference)) {
     State.LowestLevelOnLine =
         std::min(State.LowestLevelOnLine, Current.NestingLevel);
   }
@@ -1511,7 +1511,7 @@ unsigned ContinuationIndenter::moveStateToNextToken(LineState &State,
   //   }, a, b, c);
   if (Current.isNot(tok::comment) && !Current.ClosesRequiresClause &&
       Previous && Previous->isOneOf(tok::l_brace, TT_ArrayInitializerLSquare) &&
-      !Previous->is(TT_DictLiteral) && State.Stack.size() > 1 &&
+      Previous->isNot(TT_DictLiteral) && State.Stack.size() > 1 &&
       !CurrentState.HasMultipleNestedBlocks) {
     if (State.Stack[State.Stack.size() - 2].NestedBlockInlined && Newline)
       for (ParenState &PState : llvm::drop_end(State.Stack))
@@ -1641,7 +1641,8 @@ void ContinuationIndenter::moveStatePastFakeLParens(LineState &State,
     //       ParameterToInnerFunction));
     if (PrecedenceLevel > prec::Unknown)
       NewParenState.LastSpace = std::max(NewParenState.LastSpace, State.Column);
-    if (PrecedenceLevel != prec::Conditional && !Current.is(TT_UnaryOperator) &&
+    if (PrecedenceLevel != prec::Conditional &&
+        Current.isNot(TT_UnaryOperator) &&
         Style.AlignAfterOpenBracket != FormatStyle::BAS_DontAlign) {
       NewParenState.StartOfFunctionCall = State.Column;
     }
@@ -2146,7 +2147,7 @@ unsigned ContinuationIndenter::handleEndOfLine(const FormatToken &Current,
 static StringRef getEnclosingFunctionName(const FormatToken &Current) {
   // Look for: 'function(' or 'function<templates>(' before Current.
   auto Tok = Current.getPreviousNonComment();
-  if (!Tok || !Tok->is(tok::l_paren))
+  if (!Tok || Tok->isNot(tok::l_paren))
     return "";
   Tok = Tok->getPreviousNonComment();
   if (!Tok)
@@ -2156,7 +2157,7 @@ static StringRef getEnclosingFunctionName(const FormatToken &Current) {
     if (Tok)
       Tok = Tok->getPreviousNonComment();
   }
-  if (!Tok || !Tok->is(tok::identifier))
+  if (!Tok || Tok->isNot(tok::identifier))
     return "";
   return Tok->TokenText;
 }
diff --git a/clang/lib/Format/DefinitionBlockSeparator.cpp b/clang/lib/Format/DefinitionBlockSeparator.cpp
index 8fb6f55f629edd..319236d3bd618c 100644
--- a/clang/lib/Format/DefinitionBlockSeparator.cpp
+++ b/clang/lib/Format/DefinitionBlockSeparator.cpp
@@ -187,10 +187,10 @@ void DefinitionBlockSeparator::separateBlocks(
         InsertReplacement(OpeningLineIndex != 0);
       TargetLine = CurrentLine;
       TargetToken = TargetLine->First;
-      while (TargetToken && !TargetToken->is(tok::r_brace))
+      while (TargetToken && TargetToken->isNot(tok::r_brace))
         TargetToken = TargetToken->Next;
       if (!TargetToken)
-        while (I < Lines.size() && !Lines[I]->First->is(tok::r_brace))
+        while (I < Lines.size() && Lines[I]->First->isNot(tok::r_brace))
           ++I;
     } else if (CurrentLine->First->closesScope()) {
       if (OpeningLineIndex > Lines.size())
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index be0a07f25b946b..339af30e38a7a8 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -2417,7 +2417,7 @@ class Formatter : public TokenAnalyzer {
     for (const AnnotatedLine *Line : Lines) {
       AlignmentDiff += countVariableAlignments(Line->Children);
       for (FormatToken *Tok = Line->First; Tok && Tok->Next; Tok = Tok->Next) {
-        if (!Tok->is(TT_PointerOrReference))
+        if (Tok->isNot(TT_PointerOrReference))
           continue;
         // Don't treat space in `void foo() &&` as evidence.
         if (const auto *Prev = Tok->getPreviousNonComment()) {
@@ -2688,7 +2688,7 @@ class Cleaner : public TokenAnalyzer {
                    bool DeleteLeft) {
     auto NextNotDeleted = [this](const FormatToken &Tok) -> FormatToken * {
       for (auto *Res = Tok.Next; Res; Res = Res->Next) {
-        if (!Res->is(tok::comment) &&
+        if (Res->isNot(tok::comment) &&
             DeletedTokens.find(Res) == DeletedTokens.end()) {
           return Res;
         }
diff --git a/clang/lib/Format/FormatToken.h b/clang/lib/Format/FormatToken.h
index 6ce9249c24cdc3..f978ade3ec2ffb 100644
--- a/clang/lib/Format/FormatToken.h
+++ b/clang/lib/Format/FormatToken.h
@@ -727,7 +727,7 @@ struct FormatToken {
   /// Returns \c true if this is a string literal that's like a label,
   /// e.g. ends with "=" or ":".
   bool isLabelString() const {
-    if (!is(tok::string_literal))
+    if (isNot(tok::string_literal))
       return false;
     StringRef Content = TokenText;
     if (Content.startswith("\"") || Content.startswith("'"))
diff --git a/clang/lib/Format/FormatTokenLexer.cpp b/clang/lib/Format/FormatTokenLexer.cpp
index 4d43796dd70e52..a90ba4af2da840 100644
--- a/clang/lib/Format/FormatTokenLexer.cpp
+++ b/clang/lib/Format/FormatTokenLexer.cpp
@@ -277,7 +277,7 @@ bool FormatTokenLexer::tryMergeNSStringLiteral() {
     return false;
   auto &At = *(Tokens.end() - 2);
   auto &String = *(Tokens.end() - 1);
-  if (!At->is(tok::at) || !String->is(tok::string_literal))
+  if (At->isNot(tok::at) || String->isNot(tok::string_literal))
     return false;
   At->Tok.setKind(tok::string_literal);
   At->TokenText = StringRef(At->TokenText.begin(),
@@ -295,7 +295,7 @@ bool FormatTokenLexer::tryMergeJSPrivateIdentifier() {
     return false;
   auto &Hash = *(Tokens.end() - 2);
   auto &Identifier = *(Tokens.end() - 1);
-  if (!Hash->is(tok::hash) || !Identifier->is(tok::identifier))
+  if (Hash->isNot(tok::hash) || Identifier->isNot(tok::identifier))
     return false;
   Hash->Tok.setKind(tok::identifier);
   Hash->TokenText =
@@ -360,7 +360,7 @@ bool FormatTokenLexer::tryMergeNullishCoalescingEqual() {
   auto &NullishCoalescing = *(Tokens.end() - 2);
   auto &Equal = *(Tokens.end() - 1);
   if (NullishCoalescing->getType() != TT_NullCoalescingOperator ||
-      !Equal->is(tok::equal)) {
+      Equal->isNot(tok::equal)) {
     return false;
   }
   NullishCoalescing->Tok.setKind(tok::equal); // no '??=' in clang tokens.
@@ -399,7 +399,7 @@ bool FormatTokenLexer::tryTransformCSharpForEach() {
   if (Tokens.size() < 1)
     return false;
   auto &Identifier = *(Tokens.end() - 1);
-  if (!Identifier->is(tok::identifier))
+  if (Identifier->isNot(tok::identifier))
     return false;
   if (Identifier->TokenText != "foreach")
     return false;
@@ -414,9 +414,9 @@ bool FormatTokenLexer::tryMergeForEach() {
     return false;
   auto &For = *(Tokens.end() - 2);
   auto &Each = *(Tokens.end() - 1);
-  if (!For->is(tok::kw_for))
+  if (For->isNot(tok::kw_for))
     return false;
-  if (!Each->is(tok::identifier))
+  if (Each->isNot(tok::identifier))
     return false;
   if (Each->TokenText != "each")
     return false;
@@ -435,7 +435,7 @@ bool FormatTokenLexer::tryTransformTryUsageForC() {
   if (Tokens.size() < 2)
     return false;
   auto &Try = *(Tokens.end() - 2);
-  if (!Try->is(tok::kw_try))
+  if (Try->isNot(tok::kw_try))
     return false;
   auto &Next = *(Tokens.end() - 1);
   if (Next->isOneOf(tok::l_brace, tok::colon, tok::hash, tok::comment))
@@ -511,7 +511,7 @@ bool FormatTokenLexer::tryMergeTokens(ArrayRef<tok::TokenKind> Kinds,
   SmallVectorImpl<FormatToken *>::const_iterator First =
       Tokens.end() - Kinds.size();
   for (unsigned i = 0; i < Kinds.size(); ++i)
-    if (!First[i]->is(Kinds[i]))
+    if (First[i]->isNot(Kinds[i]))
       return false;
 
   return tryMergeTokens(Kinds.size(), NewType);
@@ -852,14 +852,14 @@ bool FormatTokenLexer::tryMerge_TMacro() {
   if (Tokens.size() < 4)
     return false;
   FormatToken *Last = Tokens.back();
-  if (!Last->is(tok::r_paren))
+  if (Last->isNot(tok::r_paren))
     return false;
 
   FormatToken *String = Tokens[Tokens.size() - 2];
-  if (!String->is(tok::string_literal) || String->IsMultiline)
+  if (String->isNot(tok::string_literal) || String->IsMultiline)
     return false;
 
-  if (!Tokens[Tokens.size() - 3]->is(tok::l_paren))
+  if (Tokens[Tokens.size() - 3]->isNot(tok::l_paren))
     return false;
 
   FormatToken *Macro = Tokens[Tokens.size() - 4];
diff --git a/clang/lib/Format/FormatTokenSource.h b/clang/lib/Format/FormatTokenSource.h
index ffd2fbbad02ff4..7819244eb7d19a 100644
--- a/clang/lib/Format/FormatTokenSource.h
+++ b/clang/lib/Format/FormatTokenSource.h
@@ -99,7 +99,7 @@ class IndexedTokenSource : public FormatTokenSource {
   }
 
   FormatToken *getPreviousToken() override {
-    assert(Position <= 0 || !Tokens[Position - 1]->is(tok::eof));
+    assert(Position <= 0 || Tokens[Position - 1]->isNot(tok::eof));
     return Position > 0 ? Tokens[Position - 1] : nullptr;
   }
 
diff --git a/clang/lib/Format/MacroExpander.cpp b/clang/lib/Format/MacroExpander.cpp
index bc98ec4c361fed..5a1cdd884c5e69 100644
--- a/clang/lib/Format/MacroExpander.cpp
+++ b/clang/lib/Format/MacroExpander.cpp
@@ -55,7 +55,7 @@ class MacroExpander::DefinitionParser {
   // Parse the token stream and return the corresponding Definition object.
   // Returns an empty definition object with a null-Name on error.
   MacroExpander::Definition parse() {
-    if (!Current->is(tok::identifier))
+    if (Current->isNot(tok::identifier))
       return {};
     Def.Name = Current->TokenText;
     nextToken();
@@ -191,7 +191,7 @@ MacroExpander::expand(FormatToken *ID,
   auto expandArgument = [&](FormatToken *Tok) -> bool {
     // If the current token references a parameter, expand the corresponding
     // argument.
-    if (!Tok->is(tok::identifier) || ExpandedArgs.contains(Tok->TokenText))
+    if (Tok->isNot(tok::identifier) || ExpandedArgs.contains(Tok->TokenText))
       return false;
     ExpandedArgs.insert(Tok->TokenText);
     auto I = Def.ArgMap.find(Tok->TokenText);
diff --git a/clang/lib/Format/QualifierAlignmentFixer.cpp b/clang/lib/Format/QualifierAlignmentFixer.cpp
index 86f62dc2eec91a..2f920cdc4db2b5 100644
--- a/clang/lib/Format/QualifierAlignmentFixer.cpp
+++ b/clang/lib/Format/QualifierAlignmentFixer.cpp
@@ -181,7 +181,7 @@ const FormatToken *LeftRightQualifierAlignmentFixer::analyzeRight(
     tooling::Replacements &Fixes, const FormatToken *const Tok,
     const std::string &Qualifier, tok::TokenKind QualifierType) {
   // We only need to think about streams that begin with a qualifier.
-  if (!Tok->is(QualifierType))
+  if (Tok->isNot(QualifierType))
     return Tok;
   // Don't concern yourself if nothing follows the qualifier.
   if (!Tok->Next)
@@ -367,7 +367,7 @@ const FormatToken *LeftRightQualifierAlignmentFixer::analyzeLeft(
     tooling::Replacements &Fixes, const FormatToken *const Tok,
     const std::string &Qualifier, tok::TokenKind QualifierType) {
   // We only need to think about streams that begin with a qualifier.
-  if (!Tok->is(QualifierType))
+  if (Tok->isNot(QualifierType))
     return Tok;
   // Don't concern yourself if nothing preceeds the qualifier.
   if (!Tok->getPreviousNonComment())
@@ -614,7 +614,7 @@ bool LeftRightQualifierAlignmentFixer::isConfiguredQualifierOrType(
 bool LeftRightQualifierAlignmentFixer::isPossibleMacro(const FormatToken *Tok) {
   if (!Tok)
     return false;
-  if (!Tok->is(tok::identifier))
+  if (Tok->isNot(tok::identifier))
     return false;
   if (Tok->TokenText.upper() == Tok->TokenText.str()) {
     // T,K,U,V likely could be template arguments
diff --git a/clang/lib/Format/SortJavaScriptImports.cpp b/clang/lib/Format/SortJavaScriptImports.cpp
index 3ba649d07964ab..9afe85aeed437e 100644
--- a/clang/lib/Format/SortJavaScriptImports.cpp
+++ b/clang/lib/Format/SortJavaScriptImports.cpp
@@ -530,7 +530,7 @@ class JavaScriptImportSorter : public TokenAnalyzer {
           nextToken();
           if (Current->is(tok::semi))
             return true;
-          if (!Current->is(tok::period))
+          if (Current->isNot(tok::period))
             return false;
           nextToken();
         }
diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 2f71cc8dab6ed7..b6b4172818d171 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -148,7 +148,7 @@ class AnnotatingParser {
         return false;
       if (Previous.Previous->is(tok::r_paren) && Contexts.size() > 1 &&
           (!Previous.Previous->MatchingParen ||
-           !Previous.Previous->MatchingParen->is(
+           Previous.Previous->MatchingParen->isNot(
                TT_OverloadedOperatorLParen))) {
         return false;
       }
@@ -302,7 +302,7 @@ class AnnotatingParser {
     if (OpeningParen.is(TT_OverloadedOperatorLParen)) {
       // Find the previous kw_operator token.
       FormatToken *Prev = &OpeningParen;
-      while (!Prev->is(tok::kw_operator)) {
+      while (Prev->isNot(tok::kw_operator)) {
         Prev = Prev->Previous;
         assert(Prev && "Expect a kw_operator prior to the OperatorLParen!");
       }
@@ -352,7 +352,7 @@ class AnnotatingParser {
       Contexts.back().IsExpression = true;
     } else if (Line.InPPDirective &&
                (!OpeningParen.Previous ||
-                !OpeningParen.Previous->is(tok::identifier))) {
+                OpeningParen.Previous->isNot(tok::identifier))) {
       Contexts.back().IsExpression = true;
     } else if (Contexts[Contexts.size() - 2].CaretFound) {
       // This is the parameter list of an ObjC block.
@@ -1490,7 +1490,7 @@ class AnnotatingParser {
   }
 
   void parseHasInclude() {
-    if (!CurrentToken || !CurrentToken->is(tok::l_paren))
+    if (!CurrentToken || CurrentToken->isNot(tok::l_paren))
       return;
     next(); // '('
     parseIncludeDirective();
@@ -1863,7 +1863,8 @@ class AnnotatingParser {
         }
       }
     } else if (Current.is(tok::lessless) &&
-               (!Current.Previous || !Current.Previous->is(tok::kw_operator))) {
+               (!Current.Previous ||
+                Current.Previous->isNot(tok::kw_operator))) {
       Contexts.back().IsExpression = true;
     } else if (Current.isOneOf(tok::kw_return, tok::kw_throw)) {
       Contexts.back().IsExpression = true;
@@ -1891,7 +1892,7 @@ class AnnotatingParser {
       Contexts.back().CanBeExpression = false;
     } else if (Current.is(tok::semi) ||
                (Current.is(tok::exclaim) && Current.Previous &&
-                !Current.Previous->is(tok::kw_operator))) {
+                Current.Previous->isNot(tok::kw_operator))) {
       // This should be the condition or increment in a for-loop.
       // But not operator !() (can't use TT_OverloadedOperator here as its not
       // been annotated yet).
@@ -1955,7 +1956,7 @@ class AnnotatingParser {
   }
 
   void determineTokenType(FormatToken &Current) {
-    if (!Current.is(TT_Unknown)) {
+    if (Current.isNot(TT_Unknown)) {
       // The token type is already known.
       return;
     }
@@ -2043,7 +2044,7 @@ class AnnotatingParser {
       }
     } else if (Current.isBinaryOperator() &&
                (!Current.Previous || Current.Previous->isNot(tok::l_square)) &&
-               (!Current.is(tok::greater) &&
+               (Current.isNot(tok::greater) &&
                 Style.Language != FormatStyle::LK_TextProto)) {
       if (Style.isVerilog()) {
         if (Current.is(tok::lessequal) && Contexts.size() == 1 &&
@@ -2085,7 +2086,7 @@ class AnnotatingParser {
           if (AfterParen->isNot(tok::caret)) {
             if (FormatToken *BeforeParen = Current.MatchingParen->Previous) {
               if (BeforeParen->is(tok::identifier) &&
-                  !BeforeParen->is(TT_TypenameMacro) &&
+                  BeforeParen->isNot(TT_TypenameMacro) &&
                   BeforeParen->TokenText == BeforeParen->TokenText.upper() &&
                   (!BeforeParen->Previous ||
                    BeforeParen->Previous->ClosesTemplateDeclaration)) {
@@ -2894,7 +2895,7 @@ class ExpressionParser {
       next();
     FormatToken *Start = Current;
     parse(prec::LogicalOr);
-    if (!Current || !Current->is(tok::question))
+    if (!Current || Current->isNot(tok::question))
       return;
     next();
     parse(prec::Assignment);
@@ -3182,7 +3183,7 @@ static bool isFunctionDeclarationName(bool IsCpp, const FormatToken &Current,
       return false;
     Next = skipOperatorName(Next);
   } else {
-    if (!Current.is(TT_StartOfName) || Current.NestingLevel != 0)
+    if (Current.isNot(TT_StartOfName) || Current.NestingLevel != 0)
       return false;
     for (; Next; Next = Next->Next) {
       if (Next->is(TT_TemplateOpener) && Next->MatchingParen) {
@@ -3195,7 +3196,7 @@ static bool isFunctionDeclarationName(bool IsCpp, const FormatToken &Current,
           Next = skipOperatorName(Next->Next);
           break;
         }
-        if (!Next->is(tok::identifier))
+        if (Next->isNot(tok::identifier))
           return false;
       } else if (isCppAttribute(IsCpp, *Next)) {
         Next = Next->MatchingParen;
@@ -3210,7 +3211,7 @@ static bool isFunctionDeclarationName(bool IsCpp, const FormatToken &Current,
   }
 
   // Check whether parameter list can belong to a function declaration.
-  if (!Next || !Next->is(tok::l_paren) || !Next->MatchingParen)
+  if (!Next || Next->isNot(tok::l_paren) || !Next->MatchingParen)
     return false;
   // If the lines ends with "{", this is likely a function definition.
   if (Line.Last->is(tok::l_brace))
@@ -3380,7 +3381,7 @@ void TokenAnnotator::calculateFormattingInformation(AnnotatedLine &Line) const {
           if (Parameter->isOneOf(tok::comment, tok::r_brace))
             break;
           if (Parameter->Previous && Parameter->Previous->is(tok::comma)) {
-            if (!Parameter->Previous->is(TT_CtorInitializerComma) &&
+            if (Parameter->Previous->isNot(TT_CtorInitializerComma) &&
                 Parameter->HasUnescapedNewline) {
               Parameter->MustBreakBefore = true;
             }
@@ -3713,7 +3714,7 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
   }
   if (Right.is(tok::lessless)) {
     // Breaking at a << is really cheap.
-    if (!Left.is(tok::r_paren) || Right.OperatorIndex > 0) {
+    if (Left.isNot(tok::r_paren) || Right.OperatorIndex > 0) {
       // Slightly prefer to break before the first one in log-like statements.
       return 2;
     }
@@ -3837,7 +3838,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
     return false;
   }
   if (Left.is(tok::colon))
-    return !Left.is(TT_ObjCMethodExpr);
+    return Left.isNot(TT_ObjCMethodExpr);
   if (Left.is(tok::coloncolon))
     return false;
   if (Left.is(tok::less) || Right.isOneOf(tok::greater, tok::less)) {
@@ -3865,7 +3866,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
         return true;
       FormatToken *TokenBeforeMatchingParen =
           Left.MatchingParen->getPreviousNonComment();
-      if (!TokenBeforeMatchingParen || !Left.is(TT_TypeDeclarationParen))
+      if (!TokenBeforeMatchingParen || Left.isNot(TT_TypeDeclarationParen))
         return true;
     }
     // Add a space if the previous token is a pointer qualifier or the closing
@@ -3893,7 +3894,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
               (Left.NestingLevel == 1 && startsWithInitStatement(Line)))));
   }
   if (Right.is(TT_FunctionTypeLParen) && Left.isNot(tok::l_paren) &&
-      (!Left.is(TT_PointerOrReference) ||
+      (Left.isNot(TT_PointerOrReference) ||
        (getTokenPointerOrReferenceAlignment(Left) != FormatStyle::PAS_Right &&
         !Line.IsMultiVariableDeclStmt))) {
     return true;
@@ -3916,7 +3917,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
     // S::foo() & noexcept/requires
     if (Right.isOneOf(Keywords.kw_override, Keywords.kw_final, tok::kw_noexcept,
                       TT_RequiresClause) &&
-        !Right.is(TT_StartOfName)) {
+        Right.isNot(TT_StartOfName)) {
       return true;
     }
     // & {
@@ -3961,7 +3962,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
     return false;
   if (Right.isOneOf(tok::star, tok::amp, tok::ampamp)) {
     const FormatToken *Previous = &Left;
-    while (Previous && !Previous->is(tok::kw_operator)) {
+    while (Previous && Previous->isNot(tok::kw_operator)) {
       if (Previous->is(tok::identifier) || Previous->isSimpleTypeSpecifier()) {
         Previous = Previous->getPreviousNonComment();
         continue;
@@ -4033,7 +4034,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
                      TT_DesignatedInitializerLSquare,
                      TT_StructuredBindingLSquare, TT_AttributeSquare) &&
       !Left.isOneOf(tok::numeric_constant, TT_DictLiteral) &&
-      !(!Left.is(tok::r_square) && Style.SpaceBeforeSquareBrackets &&
+      !(Left.isNot(tok::r_square) && Style.SpaceBeforeSquareBrackets &&
         Right.is(TT_ArraySubscriptLSquare))) {
     return false;
   }
@@ -4428,7 +4429,7 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
          (Left.is(Keywords.kw_of) && Left.Previous &&
           (Left.Previous->is(tok::identifier) ||
            Left.Previous->isOneOf(tok::r_square, tok::r_brace)))) &&
-        (!Left.Previous || !Left.Previous->is(tok::period))) {
+        (!Left.Previous || Left.Previous->isNot(tok::period))) {
       return true;
     }
     if (Left.isOneOf(tok::kw_for, Keywords.kw_as) && Left.Previous &&
@@ -4503,7 +4504,7 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
       return false;
     }
     // Add space after a delay.
-    if (!Right.is(tok::semi) &&
+    if (Right.isNot(tok::semi) &&
         (Left.endsSequence(tok::numeric_constant, Keywords.kw_verilogHash) ||
          Left.endsSequence(tok::numeric_constant,
                            Keywords.kw_verilogHashHash) ||
@@ -4578,7 +4579,7 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
       Left.isOneOf(TT_TrailingReturnArrow, TT_LambdaArrow)) {
     return true;
   }
-  if (Left.is(tok::comma) && !Right.is(TT_OverloadedOperatorLParen) &&
+  if (Left.is(tok::comma) && Right.isNot(TT_OverloadedOperatorLParen) &&
       // In an unexpanded macro call we only find the parentheses and commas
       // in a line; the commas and closing parenthesis do not require a space.
       (Left.Children.empty() || !Left.MacroParent)) {
@@ -4636,7 +4637,7 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
     return true;
   }
   if (Left.is(TT_UnaryOperator)) {
-    if (!Right.is(tok::l_paren)) {
+    if (Right.isNot(tok::l_paren)) {
       // The alternative operators for ~ and ! are "compl" and "not".
       // If they are used instead, we do not want to combine them with
       // the token to the right, unless that is a left paren.
@@ -4719,9 +4720,9 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
       Right.isOneOf(tok::amp, tok::ampamp)) {
     return getTokenReferenceAlignment(Right) != FormatStyle::PAS_Left;
   }
-  if ((Right.is(TT_BinaryOperator) && !Left.is(tok::l_paren)) ||
+  if ((Right.is(TT_BinaryOperator) && Left.isNot(tok::l_paren)) ||
       (Left.isOneOf(TT_BinaryOperator, TT_ConditionalExpr) &&
-       !Right.is(tok::r_paren))) {
+       Right.isNot(tok::r_paren))) {
     return true;
   }
   if (Right.is(TT_TemplateOpener) && Left.is(tok::r_paren) &&
@@ -5137,7 +5138,7 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine &Line,
   // We ensure elsewhere that extensions are always on their own line.
   if ((Style.Language == FormatStyle::LK_Proto ||
        Style.Language == FormatStyle::LK_TextProto) &&
-      Right.is(TT_SelectorName) && !Right.is(tok::r_square) && Right.Next) {
+      Right.is(TT_SelectorName) && Right.isNot(tok::r_square) && Right.Next) {
     // Keep `@submessage` together in:
     // @submessage { key: value }
     if (Left.is(tok::at))
@@ -5261,7 +5262,7 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
       //   is: 'name',
       //   ...
       // });
-      if (!Next || !Next->is(tok::colon))
+      if (!Next || Next->isNot(tok::colon))
         return false;
     }
     if (Left.is(Keywords.kw_in))
@@ -5308,7 +5309,7 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
   if (Left.Tok.getObjCKeywordID() == tok::objc_interface)
     return false;
   if (Left.isOneOf(TT_JavaAnnotation, TT_LeadingJavaAnnotation))
-    return !Right.is(tok::l_paren);
+    return Right.isNot(tok::l_paren);
   if (Right.is(TT_PointerOrReference)) {
     return Line.IsMultiVariableDeclStmt ||
            (getTokenPointerOrReferenceAlignment(Right) ==
@@ -5341,7 +5342,7 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
     return Style.BreakInheritanceList == FormatStyle::BILS_AfterColon;
   if (Right.is(TT_InheritanceColon))
     return Style.BreakInheritanceList != FormatStyle::BILS_AfterColon;
-  if (Right.is(TT_ObjCMethodExpr) && !Right.is(tok::r_square) &&
+  if (Right.is(TT_ObjCMethodExpr) && Right.isNot(tok::r_square) &&
       Left.isNot(TT_SelectorName)) {
     return true;
   }
@@ -5486,7 +5487,7 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
 
   if (Right.is(tok::kw___attribute) ||
       (Right.is(tok::l_square) && Right.is(TT_AttributeSquare))) {
-    return !Left.is(TT_AttributeSquare);
+    return Left.isNot(TT_AttributeSquare);
   }
 
   if (Left.is(tok::identifier) && Right.is(tok::string_literal))
@@ -5548,8 +5549,8 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
                        tok::colon, tok::l_square, tok::at) ||
          (Left.is(tok::r_paren) &&
           Right.isOneOf(tok::identifier, tok::kw_const)) ||
-         (Left.is(tok::l_paren) && !Right.is(tok::r_paren)) ||
-         (Left.is(TT_TemplateOpener) && !Right.is(TT_TemplateCloser));
+         (Left.is(tok::l_paren) && Right.isNot(tok::r_paren)) ||
+         (Left.is(TT_TemplateOpener) && Right.isNot(TT_TemplateCloser));
 }
 
 void TokenAnnotator::printDebugInfo(const AnnotatedLine &Line) const {
diff --git a/clang/lib/Format/UnwrappedLineFormatter.cpp b/clang/lib/Format/UnwrappedLineFormatter.cpp
index 52519145279cce..8f0b05ecb91d67 100644
--- a/clang/lib/Format/UnwrappedLineFormatter.cpp
+++ b/clang/lib/Format/UnwrappedLineFormatter.cpp
@@ -405,7 +405,8 @@ class LineJoiner {
                openingLine == I[i + 1]->MatchingOpeningBlockLineIndex;
              i++, --openingLine) {
           // No space between consecutive braces.
-          I[i + 1]->First->SpacesRequiredBefore = !I[i]->Last->is(tok::r_brace);
+          I[i + 1]->First->SpacesRequiredBefore =
+              I[i]->Last->isNot(tok::r_brace);
 
           // Indent like the outer-most namespace.
           IndentTracker.nextLine(*I[i + 1]);
@@ -622,12 +623,12 @@ class LineJoiner {
     }
     Limit = limitConsideringMacros(I + 1, E, Limit);
     AnnotatedLine &Line = **I;
-    if (!Line.First->is(tok::kw_do) && !Line.First->is(tok::kw_else) &&
-        !Line.Last->is(tok::kw_else) && Line.Last->isNot(tok::r_paren)) {
+    if (Line.First->isNot(tok::kw_do) && Line.First->isNot(tok::kw_else) &&
+        Line.Last->isNot(tok::kw_else) && Line.Last->isNot(tok::r_paren)) {
       return 0;
     }
     // Only merge `do while` if `do` is the only statement on the line.
-    if (Line.First->is(tok::kw_do) && !Line.Last->is(tok::kw_do))
+    if (Line.First->is(tok::kw_do) && Line.Last->isNot(tok::kw_do))
       return 0;
     if (1 + I[1]->Last->TotalLength > Limit)
       return 0;
@@ -754,21 +755,21 @@ class LineJoiner {
       if (!Style.AllowShortIfStatementsOnASingleLine &&
           Line.First->isOneOf(tok::kw_if, tok::kw_else) &&
           !Style.BraceWrapping.AfterControlStatement &&
-          !I[1]->First->is(tok::r_brace)) {
+          I[1]->First->isNot(tok::r_brace)) {
         return 0;
       }
       if (!Style.AllowShortIfStatementsOnASingleLine &&
           Line.First->isOneOf(tok::kw_if, tok::kw_else) &&
           Style.BraceWrapping.AfterControlStatement ==
               FormatStyle::BWACS_Always &&
-          I + 2 != E && !I[2]->First->is(tok::r_brace)) {
+          I + 2 != E && I[2]->First->isNot(tok::r_brace)) {
         return 0;
       }
       if (!Style.AllowShortLoopsOnASingleLine &&
           Line.First->isOneOf(tok::kw_while, tok::kw_do, tok::kw_for,
                               TT_ForEachMacro) &&
           !Style.BraceWrapping.AfterControlStatement &&
-          !I[1]->First->is(tok::r_brace)) {
+          I[1]->First->isNot(tok::r_brace)) {
         return 0;
       }
       if (!Style.AllowShortLoopsOnASingleLine &&
@@ -776,7 +777,7 @@ class LineJoiner {
                               TT_ForEachMacro) &&
           Style.BraceWrapping.AfterControlStatement ==
               FormatStyle::BWACS_Always &&
-          I + 2 != E && !I[2]->First->is(tok::r_brace)) {
+          I + 2 != E && I[2]->First->isNot(tok::r_brace)) {
         return 0;
       }
       // FIXME: Consider an option to allow short exception handling clauses on
@@ -886,7 +887,7 @@ class LineJoiner {
                          SmallVectorImpl<AnnotatedLine *>::const_iterator E,
                          unsigned Limit) {
     if (I[0]->InPPDirective && I + 1 != E &&
-        !I[1]->First->HasUnescapedNewline && !I[1]->First->is(tok::eof)) {
+        !I[1]->First->HasUnescapedNewline && I[1]->First->isNot(tok::eof)) {
       return Limit < 2 ? 0 : Limit - 2;
     }
     return Limit;
@@ -1494,8 +1495,10 @@ static auto computeNewlines(const AnnotatedLine &Line,
         previousToken = PreviousLine->Last->getPreviousNonComment();
       else
         previousToken = PreviousLine->Last;
-      if ((!previousToken || !previousToken->is(tok::l_brace)) && Newlines <= 1)
+      if ((!previousToken || previousToken->isNot(tok::l_brace)) &&
+          Newlines <= 1) {
         Newlines = 2;
+      }
     } break;
     }
   }
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index a89265a858f405..5a82b200055a87 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -394,7 +394,7 @@ bool UnwrappedLineParser::parseLevel(const FormatToken *OpeningBrace,
         ParseDefault();
         continue;
       }
-      if (CanContainBracedList && !FormatTok->is(TT_MacroBlockBegin) &&
+      if (CanContainBracedList && FormatTok->isNot(TT_MacroBlockBegin) &&
           tryToParseBracedList()) {
         continue;
       }
@@ -615,7 +615,7 @@ void UnwrappedLineParser::calculateBraceTypes(bool ExpectClassBody) {
       LBraceStack.pop_back();
       break;
     case tok::identifier:
-      if (!Tok->is(TT_StatementMacro))
+      if (Tok->isNot(TT_StatementMacro))
         break;
       [[fallthrough]];
     case tok::at:
@@ -799,8 +799,8 @@ FormatToken *UnwrappedLineParser::parseBlock(
   if (eof())
     return IfLBrace;
 
-  if (MacroBlock ? !FormatTok->is(TT_MacroBlockEnd)
-                 : !FormatTok->is(tok::r_brace)) {
+  if (MacroBlock ? FormatTok->isNot(TT_MacroBlockEnd)
+                 : FormatTok->isNot(tok::r_brace)) {
     Line->Level = InitialLevel;
     FormatTok->setBlockKind(BK_Block);
     return IfLBrace;
@@ -1080,7 +1080,7 @@ void UnwrappedLineParser::parsePPIf(bool IfDef) {
   bool MaybeIncludeGuard = IfNDef;
   if (IncludeGuard == IG_Inited && MaybeIncludeGuard) {
     for (auto &Line : Lines) {
-      if (!Line.Tokens.front().Tok->is(tok::comment)) {
+      if (Line.Tokens.front().Tok->isNot(tok::comment)) {
         MaybeIncludeGuard = false;
         IncludeGuard = IG_Rejected;
         break;
@@ -1612,7 +1612,7 @@ void UnwrappedLineParser::parseStructuralElement(
         nextToken();
         if (FormatTok->is(tok::kw_public))
           nextToken();
-        if (!FormatTok->is(tok::string_literal))
+        if (FormatTok->isNot(tok::string_literal))
           return;
         nextToken();
         if (FormatTok->is(tok::semi))
@@ -1887,8 +1887,9 @@ void UnwrappedLineParser::parseStructuralElement(
       // a new unwrapped line, so they are special cased below.
       size_t TokenCount = Line->Tokens.size();
       if (Style.isJavaScript() && FormatTok->is(Keywords.kw_function) &&
-          (TokenCount > 1 || (TokenCount == 1 && !Line->Tokens.front().Tok->is(
-                                                     Keywords.kw_async)))) {
+          (TokenCount > 1 ||
+           (TokenCount == 1 &&
+            Line->Tokens.front().Tok->isNot(Keywords.kw_async)))) {
         tryToParseJSFunction();
         break;
       }
@@ -2872,7 +2873,7 @@ void UnwrappedLineParser::parseTryCatch() {
           FormatTok->is(tok::l_brace)) {
         do {
           nextToken();
-        } while (!FormatTok->is(tok::r_brace));
+        } while (FormatTok->isNot(tok::r_brace));
         nextToken();
       }
 
@@ -2895,7 +2896,7 @@ void UnwrappedLineParser::parseTryCatch() {
       addUnwrappedLine();
     else
       NeedsUnwrappedLine = true;
-  } else if (!FormatTok->is(tok::kw_catch)) {
+  } else if (FormatTok->isNot(tok::kw_catch)) {
     // The C++ standard requires a compound-statement after a try.
     // If there's none, we try to assume there's a structuralElement
     // and try to continue.
@@ -3109,7 +3110,7 @@ void UnwrappedLineParser::parseDoWhile() {
   parseLoopBody(/*KeepBraces=*/true, Style.BraceWrapping.BeforeWhile);
 
   // FIXME: Add error handling.
-  if (!FormatTok->is(tok::kw_while)) {
+  if (FormatTok->isNot(tok::kw_while)) {
     addUnwrappedLine();
     return;
   }
@@ -3260,7 +3261,7 @@ void UnwrappedLineParser::parseAccessSpecifier() {
   if (FormatTok->is(tok::colon)) {
     nextToken();
     addUnwrappedLine();
-  } else if (!FormatTok->is(tok::coloncolon) &&
+  } else if (FormatTok->isNot(tok::coloncolon) &&
              !isCOperatorFollowingVar(FormatTok->Tok.getKind())) {
     // Not a variable name nor namespace name.
     addUnwrappedLine();
@@ -3574,7 +3575,7 @@ void UnwrappedLineParser::parseConstraintExpression() {
     case tok::kw_reinterpret_cast:
     case tok::kw_dynamic_cast:
       nextToken();
-      if (!FormatTok->is(tok::less))
+      if (FormatTok->isNot(tok::less))
         return;
 
       nextToken();
@@ -3746,7 +3747,7 @@ bool UnwrappedLineParser::tryToParseSimpleAttribute() {
   ScopedTokenPosition AutoPosition(Tokens);
   FormatToken *Tok = Tokens->getNextToken();
   // We already read the first [ check for the second.
-  if (!Tok->is(tok::l_square))
+  if (Tok->isNot(tok::l_square))
     return false;
   // Double check that the attribute is just something
   // fairly simple.
@@ -3758,7 +3759,7 @@ bool UnwrappedLineParser::tryToParseSimpleAttribute() {
   if (Tok->is(tok::eof))
     return false;
   Tok = Tokens->getNextToken();
-  if (!Tok->is(tok::r_square))
+  if (Tok->isNot(tok::r_square))
     return false;
   Tok = Tokens->getNextToken();
   if (Tok->is(tok::semi))
@@ -3776,7 +3777,7 @@ void UnwrappedLineParser::parseJavaEnumBody() {
   unsigned StoredPosition = Tokens->getPosition();
   bool IsSimple = true;
   FormatToken *Tok = Tokens->getNextToken();
-  while (!Tok->is(tok::eof)) {
+  while (Tok->isNot(tok::eof)) {
     if (Tok->is(tok::r_brace))
       break;
     if (Tok->isOneOf(tok::l_brace, tok::semi)) {
@@ -4165,7 +4166,7 @@ void UnwrappedLineParser::parseVerilogHierarchyIdentifier() {
 }
 
 void UnwrappedLineParser::parseVerilogSensitivityList() {
-  if (!FormatTok->is(tok::at))
+  if (FormatTok->isNot(tok::at))
     return;
   nextToken();
   // A block event expression has 2 at signs.
@@ -4768,7 +4769,7 @@ void UnwrappedLineParser::readToken(int LevelDifference) {
       }
     }
 
-    if (!FormatTok->is(tok::comment)) {
+    if (FormatTok->isNot(tok::comment)) {
       distributeComments(Comments, FormatTok);
       Comments.clear();
       return;
@@ -4798,7 +4799,7 @@ UnwrappedLineParser::parseMacroCall() {
   std::optional<llvm::SmallVector<llvm::SmallVector<FormatToken *, 8>, 1>> Args;
   assert(Line->Tokens.empty());
   nextToken();
-  if (!FormatTok->is(tok::l_paren))
+  if (FormatTok->isNot(tok::l_paren))
     return Args;
   unsigned Position = Tokens->getPosition();
   FormatToken *Tok = FormatTok;
diff --git a/clang/lib/Format/WhitespaceManager.cpp b/clang/lib/Format/WhitespaceManager.cpp
index 61e59d042b14c1..04048aedb3e392 100644
--- a/clang/lib/Format/WhitespaceManager.cpp
+++ b/clang/lib/Format/WhitespaceManager.cpp
@@ -590,14 +590,14 @@ static unsigned AlignTokens(const FormatStyle &Style, F &&Matches,
 
       // A new line starts, re-initialize line status tracking bools.
       // Keep the match state if a string literal is continued on this line.
-      if (i == 0 || !Changes[i].Tok->is(tok::string_literal) ||
-          !Changes[i - 1].Tok->is(tok::string_literal)) {
+      if (i == 0 || Changes[i].Tok->isNot(tok::string_literal) ||
+          Changes[i - 1].Tok->isNot(tok::string_literal)) {
         FoundMatchOnLine = false;
       }
       LineIsComment = true;
     }
 
-    if (!Changes[i].Tok->is(tok::comment))
+    if (Changes[i].Tok->isNot(tok::comment))
       LineIsComment = false;
 
     if (Changes[i].Tok->is(tok::comma)) {
@@ -731,10 +731,10 @@ void WhitespaceManager::alignConsecutiveMacros() {
       SpacesRequiredBefore = 0;
     }
 
-    if (!Current || !Current->is(tok::identifier))
+    if (!Current || Current->isNot(tok::identifier))
       return false;
 
-    if (!Current->Previous || !Current->Previous->is(tok::pp_define))
+    if (!Current->Previous || Current->Previous->isNot(tok::pp_define))
       return false;
 
     // For a macro function, 0 spaces are required between the
@@ -781,7 +781,7 @@ void WhitespaceManager::alignConsecutiveMacros() {
       LineIsComment = true;
     }
 
-    if (!Changes[I].Tok->is(tok::comment))
+    if (Changes[I].Tok->isNot(tok::comment))
       LineIsComment = false;
 
     if (!AlignMacrosMatches(Changes[I]))