Class Property: parse property attribute (class).

This is the third patch in a series of patches to support class properties
in addition to instance properties in objective-c.

rdar://23891898


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@258834 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 15 insertions, 0 deletions

diff --git a/lib/AST/ASTDumper.cpp b/lib/AST/ASTDumper.cpp
index 4622a75ac2..9b7944271a 100644
--- a/lib/AST/ASTDumper.cpp
+++ b/lib/AST/ASTDumper.cpp
@@ -1597,6 +1597,8 @@ void ASTDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
       OS << " strong";
     if (Attrs & ObjCPropertyDecl::OBJC_PR_unsafe_unretained)
       OS << " unsafe_unretained";
+    if (Attrs & ObjCPropertyDecl::OBJC_PR_class)
+      OS << " class";
     if (Attrs & ObjCPropertyDecl::OBJC_PR_getter)
       dumpDeclRef(D->getGetterMethodDecl(), "getter");
     if (Attrs & ObjCPropertyDecl::OBJC_PR_setter)
diff --git a/lib/AST/DeclPrinter.cpp b/lib/AST/DeclPrinter.cpp
index 6a3e8e2ae1..19c7da3074 100644
--- a/lib/AST/DeclPrinter.cpp
+++ b/lib/AST/DeclPrinter.cpp
@@ -1301,6 +1301,11 @@ void DeclPrinter::VisitObjCPropertyDecl(ObjCPropertyDecl *PDecl) {
       }
     }
 
+    if (PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_class) {
+      Out << (first ? ' ' : ',') << "class";
+      first = false;
+    }
+
     (void) first; // Silence dead store warning due to idiomatic code.
     Out << " )";
   }
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index bb6344f90d..9c9822a3de 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -847,6 +847,7 @@ static void diagnoseRedundantPropertyNullability(Parser &P,
 ///     nullable
 ///     null_unspecified
 ///     null_resettable
+///     class
 ///
 void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) {
   assert(Tok.getKind() == tok::l_paren);
@@ -962,6 +963,8 @@ void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) {
 
       // Also set the null_resettable bit.
       DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_null_resettable);
+    } else if (II->isStr("class")) {
+      DS.setPropertyAttributes(ObjCDeclSpec::DQ_PR_class);
     } else {
       Diag(AttrName, diag::err_objc_expected_property_attr) << II;
       SkipUntil(tok::r_paren, StopAtSemi);
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index db37a75479..9a976e6e59 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -303,6 +303,8 @@ makePropertyAttributesAsWritten(unsigned Attributes) {
     attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic;
   if (Attributes & ObjCDeclSpec::DQ_PR_atomic)
     attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic;
+  if (Attributes & ObjCDeclSpec::DQ_PR_class)
+    attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_class;
   
   return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten;
 }
@@ -691,6 +693,9 @@ ObjCPropertyDecl *Sema::CreatePropertyDecl(Scope *S,
   if (Attributes & ObjCDeclSpec::DQ_PR_null_resettable)
     PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_null_resettable);
 
+ if (Attributes & ObjCDeclSpec::DQ_PR_class)
+    PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_class);
+
   return PDecl;
 }