- writeln!(w, "\nuse {}::{}::{} as rust{};", types.orig_crate, types.module_path, t.ident, trait_name).unwrap();
- write!(w, "impl rust{}", t.ident).unwrap();
- maybe_write_generics(w, &t.generics, types, false);
- writeln!(w, " for {} {{", trait_name).unwrap();
- for item in t.items.iter() {
- match item {
- syn::TraitItem::Method(m) => {
- if let ExportStatus::TestOnly = export_status(&m.attrs) { continue; }
- if m.default.is_some() { unimplemented!(); }
- if m.sig.constness.is_some() || m.sig.asyncness.is_some() || m.sig.unsafety.is_some() ||
- m.sig.abi.is_some() || m.sig.variadic.is_some() {
- unimplemented!();
- }
- gen_types.push_ctx();
- assert!(gen_types.learn_generics(&m.sig.generics, types));
- write!(w, "\tfn {}", m.sig.ident).unwrap();
- types.write_rust_generic_param(w, Some(&gen_types), m.sig.generics.params.iter());
- write!(w, "(").unwrap();
- for inp in m.sig.inputs.iter() {
- match inp {
- syn::FnArg::Receiver(recv) => {
- if !recv.attrs.is_empty() || recv.reference.is_none() { unimplemented!(); }
- write!(w, "&").unwrap();
- if let Some(lft) = &recv.reference.as_ref().unwrap().1 {
- write!(w, "'{} ", lft.ident).unwrap();
- }
- if recv.mutability.is_some() {
- write!(w, "mut self").unwrap();
- } else {
- write!(w, "self").unwrap();
- }
- },
- syn::FnArg::Typed(arg) => {
- if !arg.attrs.is_empty() { unimplemented!(); }
- match &*arg.pat {
- syn::Pat::Ident(ident) => {
- if !ident.attrs.is_empty() || ident.by_ref.is_some() ||
- ident.mutability.is_some() || ident.subpat.is_some() {
- unimplemented!();
- }
- write!(w, ", {}{}: ", if types.skip_arg(&*arg.ty, Some(&gen_types)) { "_" } else { "" }, ident.ident).unwrap();
- }
- _ => unimplemented!(),
- }
- types.write_rust_type(w, Some(&gen_types), &*arg.ty);
- }
- }
- }
- write!(w, ")").unwrap();
- match &m.sig.output {
- syn::ReturnType::Type(_, rtype) => {
- write!(w, " -> ").unwrap();
- types.write_rust_type(w, Some(&gen_types), &*rtype)
- },
- _ => {},
- }
- write!(w, " {{\n\t\t").unwrap();
- match export_status(&m.attrs) {
- ExportStatus::NoExport => {
- unimplemented!();
- },
- _ => {},
- }
- if let syn::ReturnType::Type(_, rtype) = &m.sig.output {
- if let syn::Type::Reference(r) = &**rtype {
- assert_eq!(m.sig.inputs.len(), 1); // Must only take self!
- writeln!(w, "if let Some(f) = self.set_{} {{", m.sig.ident).unwrap();
- writeln!(w, "\t\t\t(f)(self);").unwrap();
- write!(w, "\t\t}}\n\t\t").unwrap();
- types.write_from_c_conversion_to_ref_prefix(w, &*r.elem, Some(&gen_types));
- write!(w, "self.{}", m.sig.ident).unwrap();
- types.write_from_c_conversion_to_ref_suffix(w, &*r.elem, Some(&gen_types));
- writeln!(w, "\n\t}}").unwrap();
- gen_types.pop_ctx();
- continue;
- }
- }
- write_method_var_decl_body(w, &m.sig, "\t", types, Some(&gen_types), true);
- write!(w, "(self.{})(", m.sig.ident).unwrap();
- write_method_call_params(w, &m.sig, "\t", types, Some(&gen_types), "", true);
-
- writeln!(w, "\n\t}}").unwrap();
- gen_types.pop_ctx();
- },
- &syn::TraitItem::Type(ref t) => {
- if t.default.is_some() || t.generics.lt_token.is_some() { unimplemented!(); }
- let mut bounds_iter = t.bounds.iter();
- match bounds_iter.next().unwrap() {
- syn::TypeParamBound::Trait(tr) => {
- writeln!(w, "\ttype {} = crate::{};", t.ident, types.resolve_path(&tr.path, Some(&gen_types))).unwrap();
- },
- _ => unimplemented!(),
- }
- if bounds_iter.next().is_some() { unimplemented!(); }
- },
- _ => unimplemented!(),
- }
+ writeln!(w, "\nuse {}::{} as rust{};", types.module_path, t.ident, trait_name).unwrap();
+ if implementable {
+ write!(w, "impl rust{}", t.ident).unwrap();
+ maybe_write_generics(w, &t.generics, types, false);
+ writeln!(w, " for {} {{", trait_name).unwrap();
+ impl_trait_for_c!(t, "", types);
+ writeln!(w, "}}\n").unwrap();
+ writeln!(w, "// We're essentially a pointer already, or at least a set of pointers, so allow us to be used").unwrap();
+ writeln!(w, "// directly as a Deref trait in higher-level structs:").unwrap();
+ writeln!(w, "impl std::ops::Deref for {} {{\n\ttype Target = Self;", trait_name).unwrap();
+ writeln!(w, "\tfn deref(&self) -> &Self {{\n\t\tself\n\t}}\n}}").unwrap();