}
}
if let Some(t) = single_contained {
+ if let syn::Type::Tuple(syn::TypeTuple { elems, .. }) = t {
+ assert!(elems.is_empty());
+ let inner_name = self.get_c_mangled_container_type(vec![single_contained.unwrap()], generics, "Option").unwrap();
+ return Some(("if ", vec![
+ (format!(".is_none() {{ {}::None }} else {{ {}::Some /*",
+ inner_name, inner_name), format!(""))
+ ], " */}", ContainerPrefixLocation::PerConv));
+ }
if let syn::Type::Reference(syn::TypeReference { elem, .. }) = t {
if let syn::Type::Slice(_) = &**elem {
return Some(("if ", vec![
}
if !self.write_c_type_intern(w, t, generics, false, false, false, false) { return false; }
} else {
- assert!(!is_ref); // We don't currently support outer reference types for non-primitive inners
+ // We don't currently support outer reference types for non-primitive inners,
+ // except for the empty tuple.
+ if let syn::Type::Tuple(t_arg) = t {
+ assert!(t_arg.elems.len() == 0 || !is_ref);
+ } else {
+ assert!(!is_ref);
+ }
if !self.write_c_type_intern(w, t, generics, false, false, false, false) { return false; }
}
}