Extend type nullability qualifiers for Objective-C.

Introduce context-sensitive, non-underscored nullability specifiers
(nonnull, nullable, null_unspecified) for Objective-C method return
types, method parameter types, and properties.

Introduce Objective-C-specific semantics, including computation of the
nullability of the result of a message send, merging of nullability
information from the @interface of a class into its @implementation,
etc .

This is the Objective-C part of rdar://problem/18868820.

llvm-svn: 240154

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index dea7a6998a2..e32df95548d 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -463,6 +463,10 @@ void Parser::Initialize() {
     ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
     ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
     ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
+    ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
+    ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
+    ObjCTypeQuals[objc_null_unspecified]
+      = &PP.getIdentifierTable().get("null_unspecified");
   }
 
   Ident_instancetype = nullptr;