}
}
-/// Convert "impl trait_path for for_obj { .. }" for manually-mapped types (ie (de)serialization)
-fn maybe_convert_trait_impl<W: std::io::Write>(w: &mut W, trait_path: &syn::Path, for_obj: &syn::Ident, types: &TypeResolver) {
- if let Some(t) = types.maybe_resolve_path(&trait_path, None) {
- let s = types.maybe_resolve_ident(for_obj).unwrap();
- if !types.crate_types.opaques.get(&s).is_some() { return; }
+/// Convert "impl trait_path for for_ty { .. }" for manually-mapped types (ie (de)serialization)
+fn maybe_convert_trait_impl<W: std::io::Write>(w: &mut W, trait_path: &syn::Path, for_ty: &syn::Type, types: &mut TypeResolver, generics: &GenericTypes) {
+ if let Some(t) = types.maybe_resolve_path(&trait_path, Some(generics)) {
+ let for_obj;
+ let full_obj_path;
+ let mut has_inner = false;
+ if let syn::Type::Path(ref p) = for_ty {
+ if let Some(ident) = p.path.get_ident() {
+ for_obj = format!("{}", ident);
+ full_obj_path = for_obj.clone();
+ has_inner = types.c_type_has_inner_from_path(&types.resolve_path(&p.path, Some(generics)));
+ } else { return; }
+ } else {
+ // We assume that anything that isn't a Path is somehow a generic that ends up in our
+ // derived-types module.
+ let mut for_obj_vec = Vec::new();
+ types.write_c_type(&mut for_obj_vec, for_ty, Some(generics), false);
+ full_obj_path = String::from_utf8(for_obj_vec).unwrap();
+ assert!(full_obj_path.starts_with(TypeResolver::generated_container_path()));
+ for_obj = full_obj_path[TypeResolver::generated_container_path().len() + 2..].into();
+ }
+
match &t as &str {
"util::ser::Writeable" => {
writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub extern \"C\" fn {}_write(obj: *const {}) -> crate::c_types::derived::CVec_u8Z {{", for_obj, for_obj).unwrap();
- writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &(*(*obj).inner) }})").unwrap();
- writeln!(w, "}}").unwrap();
- writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub(crate) extern \"C\" fn {}_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {{", for_obj).unwrap();
- writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &*(obj as *const native{}) }})", for_obj).unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_write(obj: *const {}) -> crate::c_types::derived::CVec_u8Z {{", for_obj, full_obj_path).unwrap();
+
+ let ref_type = syn::Type::Reference(syn::TypeReference {
+ and_token: syn::Token!(&)(Span::call_site()), lifetime: None, mutability: None,
+ elem: Box::new(for_ty.clone()) });
+ assert!(!types.write_from_c_conversion_new_var(w, &syn::Ident::new("obj", Span::call_site()), &ref_type, Some(generics)));
+
+ write!(w, "\tcrate::c_types::serialize_obj(").unwrap();
+ types.write_from_c_conversion_prefix(w, &ref_type, Some(generics));
+ write!(w, "unsafe {{ &*obj }}").unwrap();
+ types.write_from_c_conversion_suffix(w, &ref_type, Some(generics));
+ writeln!(w, ")").unwrap();
+
writeln!(w, "}}").unwrap();
+ if has_inner {
+ writeln!(w, "#[no_mangle]").unwrap();
+ writeln!(w, "pub(crate) extern \"C\" fn {}_write_void(obj: *const c_void) -> crate::c_types::derived::CVec_u8Z {{", for_obj).unwrap();
+ writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &*(obj as *const native{}) }})", for_obj).unwrap();
+ writeln!(w, "}}").unwrap();
+ }
},
- "util::ser::Readable" => {
+ "util::ser::Readable"|"util::ser::ReadableArgs" => {
+ // Create the Result<Object, DecodeError> syn::Type
+ let mut err_segs = syn::punctuated::Punctuated::new();
+ err_segs.push(syn::PathSegment { ident: syn::Ident::new("ln", Span::call_site()), arguments: syn::PathArguments::None });
+ err_segs.push(syn::PathSegment { ident: syn::Ident::new("msgs", Span::call_site()), arguments: syn::PathArguments::None });
+ err_segs.push(syn::PathSegment { ident: syn::Ident::new("DecodeError", Span::call_site()), arguments: syn::PathArguments::None });
+ let mut args = syn::punctuated::Punctuated::new();
+ args.push(syn::GenericArgument::Type(for_ty.clone()));
+ args.push(syn::GenericArgument::Type(syn::Type::Path(syn::TypePath {
+ qself: None, path: syn::Path {
+ leading_colon: Some(syn::Token)), segments: err_segs,
+ }
+ })));
+ let mut res_segs = syn::punctuated::Punctuated::new();
+ res_segs.push(syn::PathSegment {
+ ident: syn::Ident::new("Result", Span::call_site()),
+ arguments: syn::PathArguments::AngleBracketed(syn::AngleBracketedGenericArguments {
+ colon2_token: None, lt_token: syn::Token), args, gt_token: syn::Token),
+ })
+ });
+ let res_ty = syn::Type::Path(syn::TypePath { qself: None, path: syn::Path {
+ leading_colon: None, segments: res_segs } });
+
writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub extern \"C\" fn {}_read(ser: crate::c_types::u8slice) -> {} {{", for_obj, for_obj).unwrap();
- writeln!(w, "\tif let Ok(res) = crate::c_types::deserialize_obj(ser) {{").unwrap();
- writeln!(w, "\t\t{} {{ inner: Box::into_raw(Box::new(res)), is_owned: true }}", for_obj).unwrap();
- writeln!(w, "\t}} else {{").unwrap();
- writeln!(w, "\t\t{} {{ inner: std::ptr::null_mut(), is_owned: true }}", for_obj).unwrap();
- writeln!(w, "\t}}\n}}").unwrap();
+ write!(w, "pub extern \"C\" fn {}_read(ser: crate::c_types::u8slice", for_obj).unwrap();
+
+ let mut arg_conv = Vec::new();
+ if t == "util::ser::ReadableArgs" {
+ write!(w, ", arg: ").unwrap();
+ assert!(trait_path.leading_colon.is_none());
+ let args_seg = trait_path.segments.iter().last().unwrap();
+ assert_eq!(format!("{}", args_seg.ident), "ReadableArgs");
+ if let syn::PathArguments::AngleBracketed(args) = &args_seg.arguments {
+ assert_eq!(args.args.len(), 1);
+ if let syn::GenericArgument::Type(args_ty) = args.args.iter().next().unwrap() {
+ types.write_c_type(w, args_ty, Some(generics), false);
+
+ assert!(!types.write_from_c_conversion_new_var(&mut arg_conv, &syn::Ident::new("arg", Span::call_site()), &args_ty, Some(generics)));
+
+ write!(&mut arg_conv, "\tlet arg_conv = ").unwrap();
+ types.write_from_c_conversion_prefix(&mut arg_conv, &args_ty, Some(generics));
+ write!(&mut arg_conv, "arg").unwrap();
+ types.write_from_c_conversion_suffix(&mut arg_conv, &args_ty, Some(generics));
+ } else { unreachable!(); }
+ } else { unreachable!(); }
+ }
+ write!(w, ") -> ").unwrap();
+ types.write_c_type(w, &res_ty, Some(generics), false);
+ writeln!(w, " {{").unwrap();
+
+ if t == "util::ser::ReadableArgs" {
+ w.write(&arg_conv).unwrap();
+ write!(w, ";\n\tlet res: ").unwrap();
+ // At least in one case we need type annotations here, so provide them.
+ types.write_rust_type(w, Some(generics), &res_ty);
+ writeln!(w, " = crate::c_types::deserialize_obj_arg(ser, arg_conv);").unwrap();
+ } else {
+ writeln!(w, "\tlet res = crate::c_types::deserialize_obj(ser);").unwrap();
+ }
+ write!(w, "\t").unwrap();
+ if types.write_to_c_conversion_new_var(w, &syn::Ident::new("res", Span::call_site()), &res_ty, Some(generics), false) {
+ write!(w, "\n\t").unwrap();
+ }
+ types.write_to_c_conversion_inline_prefix(w, &res_ty, Some(generics), false);
+ write!(w, "res").unwrap();
+ types.write_to_c_conversion_inline_suffix(w, &res_ty, Some(generics), false);
+ writeln!(w, "\n}}").unwrap();
},
_ => {},
}
///
/// A few non-crate Traits are hard-coded including Default.
fn writeln_impl<W: std::io::Write>(w: &mut W, i: &syn::ItemImpl, types: &mut TypeResolver) {
+ if let syn::Type::Tuple(_) = &*i.self_ty {
+ if types.understood_c_type(&*i.self_ty, None) {
+ let mut gen_types = GenericTypes::new();
+ if !gen_types.learn_generics(&i.generics, types) {
+ eprintln!("Not implementing anything for impl tuple due to not understood generics");
+ return;
+ }
+
+ if i.defaultness.is_some() || i.unsafety.is_some() { unimplemented!(); }
+ if let Some(trait_path) = i.trait_.as_ref() {
+ if trait_path.0.is_some() { unimplemented!(); }
+ if types.understood_c_path(&trait_path.1) {
+ eprintln!("Not implementing anything for impl Trait for Tuple - we only support manual defines");
+ return;
+ } else {
+ // Just do a manual implementation:
+ maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types);
+ }
+ } else {
+ eprintln!("Not implementing anything for plain impl tuple block - we only support impl Trait for Tuples");
+ return;
+ }
+ }
+ }
if let &syn::Type::Path(ref p) = &*i.self_ty {
if p.qself.is_some() { unimplemented!(); }
if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
},
"PartialEq" => {},
// If we have no generics, try a manual implementation:
- _ if p.path.get_ident().is_some() => maybe_convert_trait_impl(w, &trait_path.1, &ident, types),
+ _ if p.path.get_ident().is_some() => maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types),
_ => {},
}
} else if p.path.get_ident().is_some() {
// If we have no generics, try a manual implementation:
- maybe_convert_trait_impl(w, &trait_path.1, &ident, types);
+ maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types);
}
} else {
let declared_type = (*types.get_declared_type(&ident).unwrap()).clone();
projects / rust-lightning / blobdiff