Initializes Ptr

macros/src/cpp.rs

@@ -27,7 +27,9 @@ fn render_class(item: Class) -> syn::Result<TokenStream> {
         let name = format_ident!("new{}", i + 1, span = ctor.span);
 
         ctors.extend(quote! {
-            pub unsafe fn #name() {}
+            pub unsafe fn #name() -> ::cppbind::Ptr<Self> {
+                todo!();
+            }
         });
     }
 

src/lib.rs

@@ -1 +1,10 @@
 pub use cppbind_macros::*;
+
+/// RAII struct to free a C++ object on the heap.
+pub struct Ptr<T>(*mut T);
+
+impl<T> Drop for Ptr<T> {
+    fn drop(&mut self) {
+        unsafe { std::ptr::drop_in_place(self.0) };
+    }
+}