From 2fb325091a8e9d790e17bdab8db240262b3ebfd9 Mon Sep 17 00:00:00 2001
From: Manman Ren <manman.ren@gmail.com>
Date: Wed, 18 May 2016 18:12:34 +0000
Subject: ObjectiveC Class Properties: warn if a class property accessor is
 mistakenly an instance method.

When diagnosing unimplemented class property, make sure we emit
a warning when we only see an instance method with the right selector.

Also warn when we only see a class method for an instance property.

rdar://26141719


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@269968 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaObjCProperty.cpp | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

(limited to 'lib/Sema/SemaObjCProperty.cpp')

diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 1bf88f4e93..f9c495d641 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -1763,19 +1763,23 @@ void Sema::DefaultSynthesizeProperties(Scope *S, Decl *D) {
       DefaultSynthesizeProperties(S, IC, IDecl);
 }
 
-static void DiagnoseUnimplementedAccessor(Sema &S,
-                                          ObjCInterfaceDecl *PrimaryClass,
-                                          Selector Method,
-                                          ObjCImplDecl* IMPDecl,
-                                          ObjCContainerDecl *CDecl,
-                                          ObjCCategoryDecl *C,
-                                          ObjCPropertyDecl *Prop,
-                                          Sema::SelectorSet &SMap) {
+static void DiagnoseUnimplementedAccessor(
+    Sema &S, ObjCInterfaceDecl *PrimaryClass, Selector Method,
+    ObjCImplDecl *IMPDecl, ObjCContainerDecl *CDecl, ObjCCategoryDecl *C,
+    ObjCPropertyDecl *Prop,
+    llvm::SmallPtrSet<const ObjCMethodDecl *, 8> &SMap) {
+  // Check to see if we have a corresponding selector in SMap and with the
+  // right method type.
+  auto I = std::find_if(SMap.begin(), SMap.end(),
+    [&](const ObjCMethodDecl *x) {
+      return x->getSelector() == Method &&
+             x->isClassMethod() == Prop->isClassProperty();
+    });
   // When reporting on missing property setter/getter implementation in
   // categories, do not report when they are declared in primary class,
   // class's protocol, or one of it super classes. This is because,
   // the class is going to implement them.
-  if (!SMap.count(Method) &&
+  if (I == SMap.end() &&
       (PrimaryClass == nullptr ||
        !PrimaryClass->lookupPropertyAccessor(Method, C,
                                              Prop->isClassProperty()))) {
@@ -1867,10 +1871,10 @@ void Sema::DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
   for (const auto *I : IMPDecl->property_impls())
     PropImplMap.insert(I->getPropertyDecl());
 
-  SelectorSet InsMap;
+  llvm::SmallPtrSet<const ObjCMethodDecl *, 8> InsMap;
   // Collect property accessors implemented in current implementation.
   for (const auto *I : IMPDecl->methods())
-    InsMap.insert(I->getSelector());
+    InsMap.insert(I);
   
   ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl);
   ObjCInterfaceDecl *PrimaryClass = nullptr;
@@ -1882,7 +1886,7 @@ void Sema::DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
         // setter/getter is implemented in category's primary class
         // implementation.
         for (const auto *I : IMP->methods())
-          InsMap.insert(I->getSelector());
+          InsMap.insert(I);
       }
 
   for (ObjCContainerDecl::PropertyMap::iterator
-- 
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