1 files changed, 21 insertions, 19 deletions

diff --git a/include/clang/AST/DeclGroup.h b/include/clang/AST/DeclGroup.h
index 6353b26f7bf5..6d5aaadf529c 100644
--- a/include/clang/AST/DeclGroup.h
+++ b/include/clang/AST/DeclGroup.h
@@ -1,4 +1,4 @@
-//===--- DeclGroup.h - Classes for representing groups of Decls -*- C++ -*-===//
+//===- DeclGroup.h - Classes for representing groups of Decls ---*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -14,26 +14,26 @@
 #ifndef LLVM_CLANG_AST_DECLGROUP_H
 #define LLVM_CLANG_AST_DECLGROUP_H
 
-#include "llvm/Support/DataTypes.h"
 #include "llvm/Support/TrailingObjects.h"
 #include <cassert>
+#include <cstdint>
 
 namespace clang {
 
 class ASTContext;
 class Decl;
-class DeclGroup;
-class DeclGroupIterator;
 
 class DeclGroup final : private llvm::TrailingObjects<DeclGroup, Decl *> {
   // FIXME: Include a TypeSpecifier object.
-  unsigned NumDecls;
+  unsigned NumDecls = 0;
 
 private:
-  DeclGroup() : NumDecls(0) {}
+  DeclGroup() = default;
   DeclGroup(unsigned numdecls, Decl** decls);
 
 public:
+  friend TrailingObjects;
+
   static DeclGroup *Create(ASTContext &C, Decl **Decls, unsigned NumDecls);
 
   unsigned size() const { return NumDecls; }
@@ -47,23 +47,21 @@ public:
     assert (i < NumDecls && "Out-of-bounds access.");
     return getTrailingObjects<Decl *>()[i];
   }
-
-  friend TrailingObjects;
 };
 
 class DeclGroupRef {
   // Note this is not a PointerIntPair because we need the address of the
   // non-group case to be valid as a Decl** for iteration.
   enum Kind { SingleDeclKind=0x0, DeclGroupKind=0x1, Mask=0x1 };
-  Decl* D;
+
+  Decl* D = nullptr;
 
   Kind getKind() const {
     return (Kind) (reinterpret_cast<uintptr_t>(D) & Mask);
   }
 
 public:
-  DeclGroupRef() : D(nullptr) {}
-
+  DeclGroupRef() = default;
   explicit DeclGroupRef(Decl* d) : D(d) {}
   explicit DeclGroupRef(DeclGroup* dg)
     : D((Decl*) (reinterpret_cast<uintptr_t>(dg) | DeclGroupKind)) {}
@@ -76,8 +74,8 @@ public:
     return DeclGroupRef(DeclGroup::Create(C, Decls, NumDecls));
   }
 
-  typedef Decl** iterator;
-  typedef Decl* const * const_iterator;
+  using iterator = Decl **;
+  using const_iterator = Decl * const *;
 
   bool isNull() const { return D == nullptr; }
   bool isSingleDecl() const { return getKind() == SingleDeclKind; }
@@ -133,22 +131,26 @@ public:
   }
 };
 
-} // end clang namespace
+} // namespace clang
 
 namespace llvm {
+
   // DeclGroupRef is "like a pointer", implement PointerLikeTypeTraits.
   template <typename T>
-  class PointerLikeTypeTraits;
+  struct PointerLikeTypeTraits;
   template <>
-  class PointerLikeTypeTraits<clang::DeclGroupRef> {
-  public:
+  struct PointerLikeTypeTraits<clang::DeclGroupRef> {
     static inline void *getAsVoidPointer(clang::DeclGroupRef P) {
       return P.getAsOpaquePtr();
     }
+
     static inline clang::DeclGroupRef getFromVoidPointer(void *P) {
       return clang::DeclGroupRef::getFromOpaquePtr(P);
     }
+
     enum { NumLowBitsAvailable = 0 };
   };
-}
-#endif
+
+} // namespace llvm
+
+#endif // LLVM_CLANG_AST_DECLGROUP_H