[code-completion] Strip outer nullability annotations when completing method implementations.

The outer nullability is transferred from the declaration to the implementation so including them is redundant.
The inner ones are not transferred so they are kept to match the exact types. When we transfer the inner ones as well
adding them in the implementation will become redundant and we should strip those as well.

rdar://21737451

llvm-svn: 243119

clang/lib/Sema/SemaCodeComplete.cpp

@@ -7079,11 +7079,13 @@ void Sema::CodeCompleteObjCMethodDecl(Scope *S,
     
     // If the result type was not already provided, add it to the
     // pattern as (type).
-    if (ReturnType.isNull())
+    if (ReturnType.isNull()) {
-      AddObjCPassingTypeChunk(Method->getSendResultType()
+      QualType ResTy = Method->getSendResultType().stripObjCKindOfType(Context);
-                                  .stripObjCKindOfType(Context),
+      AttributedType::stripOuterNullability(ResTy);
+      AddObjCPassingTypeChunk(ResTy,
                               Method->getObjCDeclQualifier(), Context, Policy,
                               Builder);
+    }
 
     Selector Sel = Method->getSelector();
 
@@ -7114,6 +7116,7 @@ void Sema::CodeCompleteObjCMethodDecl(Scope *S,
         ParamType = (*P)->getOriginalType();
       ParamType = ParamType.substObjCTypeArgs(Context, {},
                                             ObjCSubstitutionContext::Parameter);
+      AttributedType::stripOuterNullability(ParamType);
       AddObjCPassingTypeChunk(ParamType,
                               (*P)->getObjCDeclQualifier(),
                               Context, Policy,

clang/test/Index/complete-method-decls.m

@@ -87,6 +87,7 @@ typedef A *MyObjectRef;
 
 @interface I2
 -(nonnull I2 *)produceI2:(nullable I2 *)i2;
+-(int *__nullable *__nullable)something:(void(^__nullable)(int *__nullable))b;
 @end
 
 @implementation I2
@@ -222,9 +223,10 @@ typedef A *MyObjectRef;
 // CHECK-CLASSTY: ObjCInstanceMethodDecl:{LeftParen (}{Text MyObject<P1> *}{RightParen )}{TypedText meth2}
 // CHECK-CLASSTY: ObjCInstanceMethodDecl:{LeftParen (}{Text MyObjectRef}{RightParen )}{TypedText meth3}
 
-// RUN: c-index-test -code-completion-at=%s:93:2 %s | FileCheck -check-prefix=CHECK-NULLABILITY %s
+// RUN: c-index-test -code-completion-at=%s:94:2 %s | FileCheck -check-prefix=CHECK-NULLABILITY %s
-// CHECK-NULLABILITY: ObjCInstanceMethodDecl:{LeftParen (}{Text nonnull }{Text I2 *}{RightParen )}{TypedText produceI2}{TypedText :}{LeftParen (}{Text nullable }{Text I2 *}{RightParen )}{Text i2} (40)
+// CHECK-NULLABILITY: ObjCInstanceMethodDecl:{LeftParen (}{Text I2 *}{RightParen )}{TypedText produceI2}{TypedText :}{LeftParen (}{Text I2 *}{RightParen )}{Text i2} (40)
+// CHECK-NULLABILITY: ObjCInstanceMethodDecl:{LeftParen (}{Text int * _Nullable *}{RightParen )}{TypedText something}{TypedText :}{LeftParen (}{Text void (^)(int * _Nullable)}{RightParen )}{Text b}
 
-// RUN: c-index-test -code-completion-at=%s:104:2 %s | FileCheck -check-prefix=CHECK-NULLABILITY2 %s
+// RUN: c-index-test -code-completion-at=%s:105:2 %s | FileCheck -check-prefix=CHECK-NULLABILITY2 %s
-// CHECK-NULLABILITY2: ObjCInstanceMethodDecl:{LeftParen (}{Text nonnull }{Text instancetype}{RightParen )}{TypedText getI3} (40)
+// CHECK-NULLABILITY2: ObjCInstanceMethodDecl:{LeftParen (}{Text instancetype}{RightParen )}{TypedText getI3} (40)
-// CHECK-NULLABILITY2: ObjCInstanceMethodDecl:{LeftParen (}{Text nonnull }{Text I3 *}{RightParen )}{TypedText produceI3}{TypedText :}{LeftParen (}{Text nonnull }{Text I3 *}{RightParen )}{Text i3} (40)
+// CHECK-NULLABILITY2: ObjCInstanceMethodDecl:{LeftParen (}{Text I3 *}{RightParen )}{TypedText produceI3}{TypedText :}{LeftParen (}{Text I3 *}{RightParen )}{Text i3} (40)

clang/test/Index/complete-parameterized-classes.m

@@ -65,7 +65,7 @@ void test3() {
 // CHECK-CC5: ObjCIvarDecl:{ResultType __kindof NSObject *}{TypedText myVar} (35)
 
 // RUN: c-index-test -code-completion-at=%s:37:2 %s | FileCheck -check-prefix=CHECK-CC6 %s
-// CHECK-CC6: ObjCInstanceMethodDecl:{LeftParen (}{Text void}{RightParen )}{TypedText apply2}{TypedText :}{LeftParen (}{Text void (^ _Nonnull)(id, NSObject *)}{RightParen )}{Text block} (40)
+// CHECK-CC6: ObjCInstanceMethodDecl:{LeftParen (}{Text void}{RightParen )}{TypedText apply2}{TypedText :}{LeftParen (}{Text void (^)(id, NSObject *)}{RightParen )}{Text block} (40)
 // CHECK-CC6: ObjCInstanceMethodDecl:{LeftParen (}{Text void}{RightParen )}{TypedText apply}{TypedText :}{LeftParen (}{Text void (^)(id, NSObject *)}{RightParen )}{Text block} (40)
 // CHECK-CC6: ObjCInstanceMethodDecl:{LeftParen (}{Text NSObject *}{RightParen )}{TypedText getit}{TypedText :}{LeftParen (}{Text id}{RightParen )}{Text val} (40)
 // CHECK-CC6: ObjCInstanceMethodDecl:{LeftParen (}{Text id}{RightParen )}{TypedText prop} (40)