[C++11] Replacing ObjCInterfaceDecl iterators known_extensions_begin() and known_extensions_end() with iterator_range known_extensions(). Updating all of the usages of the iterators with range-based for loops.

llvm-svn: 203857
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 64cdda1..2f8b8e6 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -387,10 +387,7 @@
     if (!ID)
       return;
     // Add redeclared method here.
-    for (ObjCInterfaceDecl::known_extensions_iterator
-           Ext = ID->known_extensions_begin(),
-           ExtEnd = ID->known_extensions_end();
-         Ext != ExtEnd; ++Ext) {
+    for (const auto *Ext : ID->known_extensions()) {
       if (ObjCMethodDecl *RedeclaredMethod =
             Ext->getMethod(ObjCMethod->getSelector(),
                                   ObjCMethod->isInstanceMethod()))
@@ -1854,12 +1851,8 @@
 unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const {
   unsigned count = 0;  
   // Count ivars declared in class extension.
-  for (ObjCInterfaceDecl::known_extensions_iterator
-         Ext = OI->known_extensions_begin(),
-         ExtEnd = OI->known_extensions_end();
-       Ext != ExtEnd; ++Ext) {
+  for (const auto *Ext : OI->known_extensions())
     count += Ext->ivar_size();
-  }
   
   // Count ivar defined in this class's implementation.  This
   // includes synthesized ivars.
diff --git a/clang/lib/AST/DeclObjC.cpp b/clang/lib/AST/DeclObjC.cpp
index 2fe7dac..0844a22 100644
--- a/clang/lib/AST/DeclObjC.cpp
+++ b/clang/lib/AST/DeclObjC.cpp
@@ -1224,10 +1224,7 @@
         curIvar->setNextIvar(*I);
     }
 
-    for (ObjCInterfaceDecl::known_extensions_iterator
-           Ext = known_extensions_begin(),
-           ExtEnd = known_extensions_end();
-         Ext != ExtEnd; ++Ext) {
+    for (const auto *Ext : known_extensions()) {
       if (!Ext->ivar_empty()) {
         ObjCCategoryDecl::ivar_iterator
           I = Ext->ivar_begin(),
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 876b078..5b1815f 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -12249,10 +12249,7 @@
             Diag(ClsIvar->getLocation(), diag::note_previous_definition);
             continue;
           }
-          for (ObjCInterfaceDecl::known_extensions_iterator
-                 Ext = IDecl->known_extensions_begin(),
-                 ExtEnd = IDecl->known_extensions_end();
-               Ext != ExtEnd; ++Ext) {
+          for (const auto *Ext : IDecl->known_extensions()) {
             if (const ObjCIvarDecl *ClsExtIvar
                   = Ext->getIvarDecl(ClsFields[i]->getIdentifier())) {
               Diag(ClsFields[i]->getLocation(), 
diff --git a/clang/lib/Sema/SemaObjCProperty.cpp b/clang/lib/Sema/SemaObjCProperty.cpp
index a10e3d8..4c2f889 100644
--- a/clang/lib/Sema/SemaObjCProperty.cpp
+++ b/clang/lib/Sema/SemaObjCProperty.cpp
@@ -343,12 +343,9 @@
   if (CCPrimary) {
     // Check for duplicate declaration of this property in current and
     // other class extensions.
-    for (ObjCInterfaceDecl::known_extensions_iterator
-           Ext = CCPrimary->known_extensions_begin(),
-           ExtEnd = CCPrimary->known_extensions_end();
-         Ext != ExtEnd; ++Ext) {
+    for (const auto *Ext : CCPrimary->known_extensions()) {
       if (ObjCPropertyDecl *prevDecl
-            = ObjCPropertyDecl::findPropertyDecl(*Ext, PropertyId)) {
+            = ObjCPropertyDecl::findPropertyDecl(Ext, PropertyId)) {
         Diag(AtLoc, diag::err_duplicate_property);
         Diag(prevDecl->getLocation(), diag::note_property_declare);
         return 0;
@@ -868,9 +865,7 @@
       bool ReadWriteProperty = false;
       // Search into the class extensions and see if 'readonly property is
       // redeclared 'readwrite', then no warning is to be issued.
-      for (ObjCInterfaceDecl::known_extensions_iterator
-            Ext = IDecl->known_extensions_begin(),
-            ExtEnd = IDecl->known_extensions_end(); Ext != ExtEnd; ++Ext) {
+      for (auto *Ext : IDecl->known_extensions()) {
         DeclContext::lookup_result R = Ext->lookup(property->getDeclName());
         if (!R.empty())
           if (ObjCPropertyDecl *ExtProp = dyn_cast<ObjCPropertyDecl>(R[0])) {