fixing setters

Author: Omar Habra

include/swift/AST/Decl.h

@@ -4972,6 +4972,12 @@ class VarDecl : public AbstractStorageDecl {
     : VarDecl(DeclKind::Var, isStatic, introducer, nameLoc,
               name, dc, StorageIsMutable_t(introducer == Introducer::Var)) {}
 
+  static VarDecl *createImported(ASTContext &Context, DeclName Name,
+                                   SourceLoc SubscriptLoc,
+                                   SourceLoc ArrowLoc, Type ElementTy,
+                                   DeclContext *Parent,
+                                   ClangNode ClangN);
+
   SourceRange getSourceRange() const;
 
   Identifier getName() const { return getBaseIdentifier(); }

lib/AST/Decl.cpp

@@ -7128,6 +7128,22 @@ SubscriptDecl *SubscriptDecl::create(ASTContext &Context, DeclName Name,
   return SD;
 }
 
+VarDecl *VarDecl::createImported(ASTContext &Context, DeclName Name,
+                                             SourceLoc SubscriptLoc,
+                                             SourceLoc ArrowLoc, Type ElementTy,
+                                             DeclContext *Parent,
+                                             ClangNode ClangN) {
+  assert(ClangN && ElementTy);
+  auto *DeclPtr = allocateMemoryForDecl<VarDecl>(
+      Context, sizeof(VarDecl), /*includeSpaceForClangNode=*/true);
+
+  auto *const SD = ::new (DeclPtr)
+      VarDecl(false, Introducer::Var, SourceLoc(), Name.getBaseIdentifier(), Parent);
+  SD->setInterfaceType(ElementTy);
+  SD->setClangNode(ClangN);
+  return SD;
+}
+
 SubscriptDecl *SubscriptDecl::createImported(ASTContext &Context, DeclName Name,
                                              SourceLoc SubscriptLoc,
                                              ParameterList *Indices,