[clang] [HLSL] Add copy assignment and construtor to resource types (PR #156075)

[Shafik Yaghmour via cfe-commits]

================
@@ -431,6 +435,30 @@ Expr *BuiltinTypeMethodBuilder::getResourceHandleExpr() {
                                     OK_Ordinary);
 }
 
+template <typename T>
+BuiltinTypeMethodBuilder &
+BuiltinTypeMethodBuilder::getResourceHandle(T ResourceRecord) {
+  ensureCompleteDecl();
+
+  Expr *ResourceExpr = convertPlaceholder(ResourceRecord);
+
+  ASTContext &AST = DeclBuilder.SemaRef.getASTContext();
+  FieldDecl *HandleField = DeclBuilder.getResourceHandleField();
+  MemberExpr *HandleExpr = MemberExpr::CreateImplicit(
+      AST, ResourceExpr, false, HandleField, HandleField->getType(), VK_LValue,
+      OK_Ordinary);
+  StmtsList.push_back(HandleExpr);
+  return *this;
+}
+
+BuiltinTypeMethodBuilder &BuiltinTypeMethodBuilder::returnThis() {
+  ASTContext &AST = DeclBuilder.SemaRef.getASTContext();
+  CXXThisExpr *ThisExpr = CXXThisExpr::Create(
+      AST, SourceLocation(), Method->getFunctionObjectParameterType(), true);
----------------
shafik wrote:

```suggestion
      AST, SourceLocation(), Method->getFunctionObjectParameterType(), /*IsImplicit=*/true);
```

https://github.com/llvm/llvm-project/pull/156075