+ writeln!(w, "}}").unwrap();
+ } else if path_matches_nongeneric(&trait_path.1, &["FromStr"]) {
+ let mut err_opt = None;
+ for item in i.items.iter() {
+ match item {
+ syn::ImplItem::Type(ty) if format!("{}", ty.ident) == "Err" => {
+ err_opt = Some(&ty.ty);
+ },
+ _ => {}
+ }
+ }
+ let err_ty = err_opt.unwrap();
+ if let Some(container) = types.get_c_mangled_container_type(vec![&*i.self_ty, &err_ty], Some(&gen_types), "Result") {
+ writeln!(w, "#[no_mangle]").unwrap();
+ writeln!(w, "/// Read a {} object from a string", ident).unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_from_str(s: crate::c_types::Str) -> {} {{", ident, container).unwrap();
+ writeln!(w, "\tmatch {}::from_str(s.into_str()) {{", resolved_path).unwrap();
+
+ writeln!(w, "\t\tOk(r) => {{").unwrap();
+ let new_var = types.write_to_c_conversion_new_var(w, &format_ident!("r"), &*i.self_ty, Some(&gen_types), false);
+ write!(w, "\t\t\tcrate::c_types::CResultTempl::ok(\n\t\t\t\t").unwrap();
+ types.write_to_c_conversion_inline_prefix(w, &*i.self_ty, Some(&gen_types), false);
+ write!(w, "{}r", if new_var { "local_" } else { "" }).unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &*i.self_ty, Some(&gen_types), false);
+ writeln!(w, "\n\t\t\t)\n\t\t}},").unwrap();
+
+ writeln!(w, "\t\tErr(e) => {{").unwrap();
+ let new_var = types.write_to_c_conversion_new_var(w, &format_ident!("e"), &err_ty, Some(&gen_types), false);
+ write!(w, "\t\t\tcrate::c_types::CResultTempl::err(\n\t\t\t\t").unwrap();
+ types.write_to_c_conversion_inline_prefix(w, &err_ty, Some(&gen_types), false);
+ write!(w, "{}e", if new_var { "local_" } else { "" }).unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &err_ty, Some(&gen_types), false);
+ writeln!(w, "\n\t\t\t)\n\t\t}},").unwrap();
+
+ writeln!(w, "\t}}.into()\n}}").unwrap();
+ }
+ } else if path_matches_nongeneric(&trait_path.1, &["Display"]) {
+ writeln!(w, "#[no_mangle]").unwrap();
+ writeln!(w, "/// Get the string representation of a {} object", ident).unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_to_str(o: &crate::{}) -> Str {{", ident, resolved_path).unwrap();
+
+ let self_ty = &i.self_ty;
+ let ref_type: syn::Type = syn::parse_quote!(&#self_ty);
+ let new_var = types.write_from_c_conversion_new_var(w, &format_ident!("o"), &ref_type, Some(&gen_types));
+ write!(w, "\talloc::format!(\"{{}}\", ").unwrap();
+ types.write_from_c_conversion_prefix(w, &ref_type, Some(&gen_types));
+ write!(w, "{}o", if new_var { "local_" } else { "" }).unwrap();
+ types.write_from_c_conversion_suffix(w, &ref_type, Some(&gen_types));
+ writeln!(w, ").into()").unwrap();
+