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Update args on supertraits of supertraits when cloning trait impls #113

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merged 3 commits into from
Oct 9, 2023
Merged

Update args on supertraits of supertraits when cloning trait impls #113

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10d1bac
Drop unused parameter from `get_module_type_resolver`
TheBlueMatt Oct 8, 2023
6c7a4f5
Update args on supertraits of supertraits when cloning trait impls
TheBlueMatt Oct 8, 2023
35baacd
Update auto-generated bindings
TheBlueMatt Oct 8, 2023
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23 changes: 15 additions & 8 deletions c-bindings-gen/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1254,15 +1254,22 @@ fn writeln_impl<W: std::io::Write>(w: &mut W, w_uses: &mut HashSet<String, NonRa
writeln!(w, "extern \"C\" fn {}_{}_cloned(new_obj: &mut crate::{}) {{", trait_obj.ident, ident, full_trait_path).unwrap();
writeln!(w, "\tnew_obj.this_arg = {}_clone_void(new_obj.this_arg);", ident).unwrap();
writeln!(w, "\tnew_obj.free = Some({}_free_void);", ident).unwrap();
walk_supertraits!(trait_obj, Some(&types), (
(s, t, _) => {
if types.crate_types.traits.get(s).is_some() {
assert!(!types.is_clonable(s)); // We don't currently support cloning with a clonable supertrait
writeln!(w, "\tnew_obj.{}.this_arg = new_obj.this_arg;", t).unwrap();
writeln!(w, "\tnew_obj.{}.free = None;", t).unwrap();

fn seek_supertraits<W: std::io::Write>(w: &mut W, pfx: &str, tr: &syn::ItemTrait, types: &TypeResolver) {
walk_supertraits!(tr, Some(types), (
(s, t, _) => {
if types.crate_types.traits.get(s).is_some() {
assert!(!types.is_clonable(s)); // We don't currently support cloning with a clonable supertrait
writeln!(w, "\tnew_obj.{}{}.this_arg = new_obj.this_arg;", pfx, t).unwrap();
writeln!(w, "\tnew_obj.{}{}.free = None;", pfx, t).unwrap();
let tr = types.crate_types.traits.get(s).unwrap();
let resolver = get_module_type_resolver!(s, types.crate_types);
seek_supertraits(w, &format!("{}.", t), tr, &resolver);
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non-blocking nit: Would be a bit clearer if we made pfx an Option<&str> and adjusted the format string accordingly.

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That feels less readable to me - it's more code and not doing anything other than maintaining the prefix (which still can be arbitrarily long). Would you prefer a different variable name instead?

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Alright, then feel free to leave as is.

}
}
}
) );
) );
}
seek_supertraits(w, "", trait_obj, types);
writeln!(w, "}}").unwrap();
}
write!(w, "\n").unwrap();
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