From 48b0863f52616cff30b652da6f25503d82afd89b Mon Sep 17 00:00:00 2001
From: David Majnemer <david.majnemer@gmail.com>
Date: Mon, 14 Jul 2014 23:12:54 +0000
Subject: [PATCH] AST: Cleanup __uuidof related code

Switch some things to use range-based for loops.
Change CXXUuidofExpr::GetUuidAttrOfType's return type to be const.
No functionality changed.

llvm-svn: 213009
---
 clang/include/clang/AST/ExprCXX.h |  4 ++--
 clang/lib/AST/ExprCXX.cpp         | 17 ++++++++---------
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/clang/include/clang/AST/ExprCXX.h b/clang/include/clang/AST/ExprCXX.h
index 4403b08..5178406 100644
--- a/clang/include/clang/AST/ExprCXX.h
+++ b/clang/include/clang/AST/ExprCXX.h
@@ -737,8 +737,8 @@ public:
 
   /// Grabs __declspec(uuid()) off a type, or returns 0 if we cannot resolve to
   /// a single GUID.
-  static UuidAttr *GetUuidAttrOfType(QualType QT,
-                                     bool *HasMultipleGUIDsPtr = nullptr);
+  static const UuidAttr *GetUuidAttrOfType(QualType QT,
+                                           bool *HasMultipleGUIDsPtr = nullptr);
 
   // Iterators
   child_range children() {
diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 1c90678..31bf432 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -55,8 +55,8 @@ QualType CXXUuidofExpr::getTypeOperand(ASTContext &Context) const {
 }
 
 // static
-UuidAttr *CXXUuidofExpr::GetUuidAttrOfType(QualType QT,
-                                           bool *RDHasMultipleGUIDsPtr) {
+const UuidAttr *CXXUuidofExpr::GetUuidAttrOfType(QualType QT,
+                                                 bool *RDHasMultipleGUIDsPtr) {
   // Optionally remove one level of pointer, reference or array indirection.
   const Type *Ty = QT.getTypePtr();
   if (QT->isPointerType() || QT->isReferenceType())
@@ -64,7 +64,6 @@ UuidAttr *CXXUuidofExpr::GetUuidAttrOfType(QualType QT,
   else if (QT->isArrayType())
     Ty = Ty->getBaseElementTypeUnsafe();
 
-  // Loop all record redeclaration looking for an uuid attribute.
   CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
   if (!RD)
     return nullptr;
@@ -73,13 +72,12 @@ UuidAttr *CXXUuidofExpr::GetUuidAttrOfType(QualType QT,
   if (ClassTemplateSpecializationDecl *CTSD =
           dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
     const TemplateArgumentList &TAL = CTSD->getTemplateArgs();
-    UuidAttr *UuidForRD = nullptr;
+    const UuidAttr *UuidForRD = nullptr;
 
-    for (unsigned I = 0, N = TAL.size(); I != N; ++I) {
-      const TemplateArgument &TA = TAL[I];
+    for (const TemplateArgument &TA : TAL.asArray()) {
       bool SeenMultipleGUIDs = false;
 
-      UuidAttr *UuidForTA = nullptr;
+      const UuidAttr *UuidForTA = nullptr;
       if (TA.getKind() == TemplateArgument::Type)
         UuidForTA = GetUuidAttrOfType(TA.getAsType(), &SeenMultipleGUIDs);
       else if (TA.getKind() == TemplateArgument::Declaration)
@@ -108,8 +106,9 @@ UuidAttr *CXXUuidofExpr::GetUuidAttrOfType(QualType QT,
     return UuidForRD;
   }
 
-  for (auto I : RD->redecls())
-    if (auto Uuid = I->getAttr<UuidAttr>())
+  // Loop over all record redeclarations looking for a uuid attribute.
+  for (const TagDecl *I : RD->redecls())
+    if (const UuidAttr *Uuid = I->getAttr<UuidAttr>())
       return Uuid;
 
   return nullptr;
-- 
2.7.4