Sema: Curried functions cannot be represented in Objective-C because they don't exist

Author: slavapestov

include/swift/AST/DiagnosticsSema.def

@@ -3515,9 +3515,6 @@ WARNING(witness_swift3_objc_inference,none,
         (DescriptiveDeclKind, DeclName, Type))
 
 
-ERROR(objc_invalid_on_func_curried,none,
-      "method cannot be %" OBJC_ATTR_SELECT "0 because curried functions "
-      "cannot be represented in Objective-C", (unsigned))
 ERROR(objc_observing_accessor, none,
       "observing accessors are not allowed to be marked @objc", ())
 ERROR(objc_addressor, none,

lib/Sema/TypeCheckType.cpp

@@ -3601,20 +3601,6 @@ bool TypeChecker::isRepresentableInObjC(
     llvm_unreachable("bad kind");
   }
 
-  if (auto *FD = dyn_cast<FuncDecl>(AFD)) {
-    unsigned ExpectedParamPatterns = 1;
-    if (FD->getImplicitSelfDecl())
-      ExpectedParamPatterns++;
-    if (FD->getParameterLists().size() != ExpectedParamPatterns) {
-      if (Diagnose) {
-        diagnose(AFD->getLoc(), diag::objc_invalid_on_func_curried,
-                 getObjCDiagnosticAttrKind(Reason));
-        describeObjCReason(*this, AFD, Reason);
-      }
-      return false;
-    }
-  }
-
   // As a special case, an initializer with a single, named parameter of type
   // '()' is always representable in Objective-C. This allows us to cope with
   // zero-parameter methods with selectors that are longer than "init". For