[clang][NFC] Run modernize-use-using check over all the code

clang/lib/APINotes/APINotesFormat.h

@@ -358,7 +358,7 @@ inline bool operator==(const SingleDeclTableKey &lhs,
 
 namespace llvm {
 template <> struct DenseMapInfo<clang::api_notes::StoredObjCSelector> {
-  typedef DenseMapInfo<unsigned> UnsignedInfo;
+  using UnsignedInfo = DenseMapInfo<unsigned>;
 
   static inline clang::api_notes::StoredObjCSelector getEmptyKey() {
     return clang::api_notes::StoredObjCSelector{UnsignedInfo::getEmptyKey(),

clang/lib/APINotes/APINotesWriter.cpp

@@ -384,7 +384,9 @@ class ContextIDTableInfo {
 
 /// Localized helper to make a type dependent, thwarting template argument
 /// deduction.
-template <typename T> struct MakeDependent { typedef T Type; };
+template <typename T> struct MakeDependent {
+  using Type = T;
+};
 
 /// Retrieve the serialized size of the given VersionTuple, for use in
 /// on-disk hash tables.

clang/lib/APINotes/APINotesYAMLCompiler.cpp

@@ -77,7 +77,7 @@ struct Param {
   StringRef Type;
 };
 
-typedef std::vector<Param> ParamsSeq;
+using ParamsSeq = std::vector<Param>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Param)
@@ -131,7 +131,7 @@ template <> struct MappingTraits<Param> {
 } // namespace llvm
 
 namespace {
-typedef std::vector<NullabilityKind> NullabilitySeq;
+using NullabilitySeq = std::vector<NullabilityKind>;
 
 struct AvailabilityItem {
   APIAvailability Mode = APIAvailability::Available;
@@ -165,7 +165,7 @@ struct Method {
   StringRef SwiftReturnOwnership;
 };
 
-typedef std::vector<Method> MethodsSeq;
+using MethodsSeq = std::vector<Method>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Method)
@@ -216,7 +216,7 @@ struct Property {
   StringRef Type;
 };
 
-typedef std::vector<Property> PropertiesSeq;
+using PropertiesSeq = std::vector<Property>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Property)
@@ -255,7 +255,7 @@ struct Class {
   PropertiesSeq Properties;
 };
 
-typedef std::vector<Class> ClassesSeq;
+using ClassesSeq = std::vector<Class>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Class)
@@ -297,7 +297,7 @@ struct Function {
   StringRef SwiftReturnOwnership;
 };
 
-typedef std::vector<Function> FunctionsSeq;
+using FunctionsSeq = std::vector<Function>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Function)
@@ -334,7 +334,7 @@ struct GlobalVariable {
   StringRef Type;
 };
 
-typedef std::vector<GlobalVariable> GlobalVariablesSeq;
+using GlobalVariablesSeq = std::vector<GlobalVariable>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(GlobalVariable)
@@ -364,7 +364,7 @@ struct EnumConstant {
   StringRef SwiftName;
 };
 
-typedef std::vector<EnumConstant> EnumConstantsSeq;
+using EnumConstantsSeq = std::vector<EnumConstant>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(EnumConstant)
@@ -424,7 +424,7 @@ struct Field {
   StringRef Type;
 };
 
-typedef std::vector<Field> FieldsSeq;
+using FieldsSeq = std::vector<Field>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Field)
@@ -448,7 +448,7 @@ template <> struct MappingTraits<Field> {
 
 namespace {
 struct Tag;
-typedef std::vector<Tag> TagsSeq;
+using TagsSeq = std::vector<Tag>;
 
 struct Tag {
   StringRef Name;
@@ -527,7 +527,7 @@ struct Typedef {
   std::optional<SwiftNewTypeKind> SwiftType;
 };
 
-typedef std::vector<Typedef> TypedefsSeq;
+using TypedefsSeq = std::vector<Typedef>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Typedef)
@@ -560,7 +560,7 @@ template <> struct MappingTraits<Typedef> {
 
 namespace {
 struct Namespace;
-typedef std::vector<Namespace> NamespacesSeq;
+using NamespacesSeq = std::vector<Namespace>;
 
 struct TopLevelItems {
   ClassesSeq Classes;
@@ -623,7 +623,7 @@ struct Versioned {
   TopLevelItems Items;
 };
 
-typedef std::vector<Versioned> VersionedSeq;
+using VersionedSeq = std::vector<Versioned>;
 } // namespace
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(Versioned)

clang/lib/AST/APValue.cpp

@@ -262,7 +262,7 @@ namespace {
 struct APValue::MemberPointerData : MemberPointerBase {
   static const unsigned InlinePathSpace =
       (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
-  typedef const CXXRecordDecl *PathElem;
+  using PathElem = const CXXRecordDecl *;
   union {
     PathElem Path[InlinePathSpace];
     PathElem *PathPtr;

clang/lib/AST/ASTDiagnostic.cpp

@@ -985,8 +985,8 @@ class TemplateDiff {
   /// The desugared TemplateArgument should provide the canonical argument
   /// for comparisons.
   class TSTiterator {
-    typedef const TemplateArgument& reference;
-    typedef const TemplateArgument* pointer;
+    using reference = const TemplateArgument &;
+    using pointer = const TemplateArgument *;
 
     /// InternalIterator - an iterator that is used to enter a
     /// TemplateSpecializationType and read TemplateArguments inside template

clang/lib/AST/Expr.cpp

@@ -835,7 +835,7 @@ std::string PredefinedExpr::ComputeName(PredefinedIdentKind IK,
         POut << " &&";
     }
 
-    typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
+    using SpecsTy = SmallVector<const ClassTemplateSpecializationDecl *, 8>;
     SpecsTy Specs;
     const DeclContext *Ctx = FD->getDeclContext();
     while (isa_and_nonnull<NamedDecl>(Ctx)) {
@@ -3549,7 +3549,7 @@ bool CallExpr::isCallToStdMove() const {
 namespace {
   /// Look for any side effects within a Stmt.
   class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
-    typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
+    using Inherited = ConstEvaluatedExprVisitor<SideEffectFinder>;
     const bool IncludePossibleEffects;
     bool HasSideEffects;
 
@@ -3904,7 +3904,7 @@ namespace {
   /// Look for a call to a non-trivial function within an expression.
   class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
   {
-    typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
+    using Inherited = ConstEvaluatedExprVisitor<NonTrivialCallFinder>;
 
     bool NonTrivial;
 

clang/lib/AST/ExprConstant.cpp

@@ -282,7 +282,7 @@ namespace {
     /// The type of the most derived object referred to by this address.
     QualType MostDerivedType;
 
-    typedef APValue::LValuePathEntry PathEntry;
+    using PathEntry = APValue::LValuePathEntry;
 
     /// The entries on the path from the glvalue to the designated subobject.
     SmallVector<PathEntry, 8> Entries;
@@ -571,8 +571,8 @@ namespace {
 
     // Note that we intentionally use std::map here so that references to
     // values are stable.
-    typedef std::pair<const void *, unsigned> MapKeyTy;
-    typedef std::map<MapKeyTy, APValue> MapTy;
+    using MapKeyTy = std::pair<const void *, unsigned>;
+    using MapTy = std::map<MapKeyTy, APValue>;
     /// Temporaries - Temporary lvalues materialized within this stack frame.
     MapTy Temporaries;
 
@@ -1468,9 +1468,9 @@ namespace {
       return Success;
     }
   };
-  typedef ScopeRAII<ScopeKind::Block> BlockScopeRAII;
-  typedef ScopeRAII<ScopeKind::FullExpression> FullExpressionRAII;
-  typedef ScopeRAII<ScopeKind::Call> CallScopeRAII;
+  using BlockScopeRAII = ScopeRAII<ScopeKind::Block>;
+  using FullExpressionRAII = ScopeRAII<ScopeKind::FullExpression>;
+  using CallScopeRAII = ScopeRAII<ScopeKind::Call>;
 }
 
 bool SubobjectDesignator::checkSubobject(EvalInfo &Info, const Expr *E,
@@ -4156,7 +4156,7 @@ struct ExtractSubobjectHandler {
   APValue &Result;
   const AccessKinds AccessKind;
 
-  typedef bool result_type;
+  using result_type = bool;
   bool failed() { return false; }
   bool found(APValue &Subobj, QualType SubobjType) {
     Result = Subobj;
@@ -4191,7 +4191,7 @@ struct ModifySubobjectHandler {
   APValue &NewVal;
   const Expr *E;
 
-  typedef bool result_type;
+  using result_type = bool;
   static const AccessKinds AccessKind = AK_Assign;
 
   bool checkConst(QualType QT) {
@@ -4698,7 +4698,7 @@ struct CompoundAssignSubobjectHandler {
 
   static const AccessKinds AccessKind = AK_Assign;
 
-  typedef bool result_type;
+  using result_type = bool;
 
   bool checkConst(QualType QT) {
     // Assigning to a const object has undefined behavior.
@@ -4845,7 +4845,7 @@ struct IncDecSubobjectHandler {
   AccessKinds AccessKind;
   APValue *Old;
 
-  typedef bool result_type;
+  using result_type = bool;
 
   bool checkConst(QualType QT) {
     // Assigning to a const object has undefined behavior.
@@ -6070,7 +6070,7 @@ static bool CheckConstexprFunction(EvalInfo &Info, SourceLocation CallLoc,
 namespace {
 struct CheckDynamicTypeHandler {
   AccessKinds AccessKind;
-  typedef bool result_type;
+  using result_type = bool;
   bool failed() { return false; }
   bool found(APValue &Subobj, QualType SubobjType) { return true; }
   bool found(APSInt &Value, QualType SubobjType) { return true; }
@@ -6417,7 +6417,7 @@ struct StartLifetimeOfUnionMemberHandler {
   bool Failed = false;
   static const AccessKinds AccessKind = AK_Assign;
 
-  typedef bool result_type;
+  using result_type = bool;
   bool failed() { return Failed; }
   bool found(APValue &Subobj, QualType SubobjType) {
     // We are supposed to perform no initialization but begin the lifetime of
@@ -7135,7 +7135,7 @@ struct DestroyObjectHandler {
   const LValue &This;
   const AccessKinds AccessKind;
 
-  typedef bool result_type;
+  using result_type = bool;
   bool failed() { return false; }
   bool found(APValue &Subobj, QualType SubobjType) {
     return HandleDestructionImpl(Info, E->getSourceRange(), This, Subobj,
@@ -8096,8 +8096,8 @@ class ExprEvaluatorBase
 
 protected:
   EvalInfo &Info;
-  typedef ConstStmtVisitor<Derived, bool> StmtVisitorTy;
-  typedef ExprEvaluatorBase ExprEvaluatorBaseTy;
+  using StmtVisitorTy = ConstStmtVisitor<Derived, bool>;
+  using ExprEvaluatorBaseTy = ExprEvaluatorBase;
 
   OptionalDiagnostic CCEDiag(const Expr *E, diag::kind D) {
     return Info.CCEDiag(E, D);
@@ -8750,8 +8750,8 @@ class LValueExprEvaluatorBase
 protected:
   LValue &Result;
   bool InvalidBaseOK;
-  typedef LValueExprEvaluatorBase LValueExprEvaluatorBaseTy;
-  typedef ExprEvaluatorBase<Derived> ExprEvaluatorBaseTy;
+  using LValueExprEvaluatorBaseTy = LValueExprEvaluatorBase;
+  using ExprEvaluatorBaseTy = ExprEvaluatorBase<Derived>;
 
   bool Success(APValue::LValueBase B) {
     Result.set(B);
@@ -10517,7 +10517,7 @@ bool PointerExprEvaluator::VisitCXXNewExpr(const CXXNewExpr *E) {
       const AccessKinds AccessKind;
       APValue *Value;
 
-      typedef bool result_type;
+      using result_type = bool;
       bool failed() { return false; }
       bool checkConst(QualType QT) {
         if (QT.isConstQualified()) {
@@ -10656,7 +10656,7 @@ bool MemberPointerExprEvaluator::VisitCastExpr(const CastExpr *E) {
     // Base-to-derived member pointer casts store the path in derived-to-base
     // order, so iterate backwards. The CXXBaseSpecifier also provides us with
     // the wrong end of the derived->base arc, so stagger the path by one class.
-    typedef std::reverse_iterator<CastExpr::path_const_iterator> ReverseIter;
+    using ReverseIter = std::reverse_iterator<CastExpr::path_const_iterator>;
     for (ReverseIter PathI(E->path_end() - 1), PathE(E->path_begin());
          PathI != PathE; ++PathI) {
       assert(!(*PathI)->isVirtual() && "memptr cast through vbase");

clang/lib/AST/ExternalASTMerger.cpp

@@ -31,7 +31,7 @@ template <typename T> struct Source {
   template <typename U> operator Source<U>() { return Source<U>(t); }
 };
 
-typedef std::pair<Source<NamedDecl *>, ASTImporter *> Candidate;
+using Candidate = std::pair<Source<NamedDecl *>, ASTImporter *>;
 
 /// For the given DC, return the DC that is safe to perform lookups on.  This is
 /// the DC we actually want to work with most of the time.

clang/lib/AST/ItaniumMangle.cpp

@@ -68,7 +68,7 @@ static bool isLambda(const NamedDecl *ND) {
 static const unsigned UnknownArity = ~0U;
 
 class ItaniumMangleContextImpl : public ItaniumMangleContext {
-  typedef std::pair<const DeclContext*, IdentifierInfo*> DiscriminatorKeyTy;
+  using DiscriminatorKeyTy = std::pair<const DeclContext *, IdentifierInfo *>;
   llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
   llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier;
   const DiscriminatorOverrideTy DiscriminatorOverride = nullptr;
@@ -283,7 +283,7 @@ class CXXNameMangler {
   // The goal is to annotate against which version of a library an object was
   // built and to be able to provide backwards compatibility ("dual abi").
   // For more information see docs/ItaniumMangleAbiTags.rst.
-  typedef SmallVector<StringRef, 4> AbiTagList;
+  using AbiTagList = SmallVector<StringRef, 4>;
 
   // State to gather all implicit and explicit tags used in a mangled name.
   // Must always have an instance of this while emitting any name to keep

clang/lib/AST/MicrosoftMangle.cpp

@@ -139,7 +139,7 @@ static const FunctionDecl *getStructor(const NamedDecl *ND) {
 /// MicrosoftMangleContextImpl - Overrides the default MangleContext for the
 /// Microsoft Visual C++ ABI.
 class MicrosoftMangleContextImpl : public MicrosoftMangleContext {
-  typedef std::pair<const DeclContext *, IdentifierInfo *> DiscriminatorKeyTy;
+  using DiscriminatorKeyTy = std::pair<const DeclContext *, IdentifierInfo *>;
   llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
   llvm::DenseMap<const NamedDecl *, unsigned> Uniquifier;
   llvm::DenseMap<const CXXRecordDecl *, unsigned> LambdaIds;
@@ -316,19 +316,19 @@ class MicrosoftCXXNameMangler {
   const NamedDecl *Structor;
   unsigned StructorType;
 
-  typedef llvm::SmallVector<std::string, 10> BackRefVec;
+  using BackRefVec = llvm::SmallVector<std::string, 10>;
   BackRefVec NameBackReferences;
 
-  typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
+  using ArgBackRefMap = llvm::DenseMap<const void *, unsigned>;
   ArgBackRefMap FunArgBackReferences;
   ArgBackRefMap TemplateArgBackReferences;
 
-  typedef llvm::DenseMap<const void *, StringRef> TemplateArgStringMap;
+  using TemplateArgStringMap = llvm::DenseMap<const void *, StringRef>;
   TemplateArgStringMap TemplateArgStrings;
   llvm::BumpPtrAllocator TemplateArgStringStorageAlloc;
   llvm::StringSaver TemplateArgStringStorage;
 
-  typedef std::set<std::pair<int, bool>> PassObjectSizeArgsSet;
+  using PassObjectSizeArgsSet = std::set<std::pair<int, bool>>;
   PassObjectSizeArgsSet PassObjectSizeArgs;
 
   ASTContext &getASTContext() const { return Context.getASTContext(); }

clang/lib/AST/ODRHash.cpp

@@ -271,7 +271,7 @@ namespace {
 // Process a Decl pointer.  Add* methods call back into ODRHash while Visit*
 // methods process the relevant parts of the Decl.
 class ODRDeclVisitor : public ConstDeclVisitor<ODRDeclVisitor> {
-  typedef ConstDeclVisitor<ODRDeclVisitor> Inherited;
+  using Inherited = ConstDeclVisitor<ODRDeclVisitor>;
   llvm::FoldingSetNodeID &ID;
   ODRHash &Hash;
 
@@ -856,7 +856,7 @@ namespace {
 // Process a Type pointer.  Add* methods call back into ODRHash while Visit*
 // methods process the relevant parts of the Type.
 class ODRTypeVisitor : public TypeVisitor<ODRTypeVisitor> {
-  typedef TypeVisitor<ODRTypeVisitor> Inherited;
+  using Inherited = TypeVisitor<ODRTypeVisitor>;
   llvm::FoldingSetNodeID &ID;
   ODRHash &Hash;