} else { None }
}
-pub fn assert_single_path_seg<'a>(p: &'a syn::Path) -> &'a syn::Ident {
- if p.leading_colon.is_some() { unimplemented!(); }
- get_single_remaining_path_seg(&mut p.segments.iter()).unwrap()
-}
-
pub fn single_ident_generic_path_to_ident(p: &syn::Path) -> Option<&syn::Ident> {
if p.segments.len() == 1 {
Some(&p.segments.iter().next().unwrap().ident)
/// Learn the generics in generics in the current context, given a TypeResolver.
pub fn learn_generics<'b, 'c>(&mut self, generics: &'a syn::Generics, types: &'b TypeResolver<'a, 'c>) -> bool {
+ // First learn simple generics...
for generic in generics.params.iter() {
match generic {
syn::GenericParam::Type(type_param) => {
_ => {},
}
}
+ // Then find generics where we are required to pass a Deref<Target=X> and pretend its just X.
if let Some(wh) = &generics.where_clause {
for pred in wh.predicates.iter() {
if let syn::WherePredicate::Type(t) = pred {
true
}
+ /// Learn the associated types from the trait in the current context.
+ pub fn learn_associated_types<'b, 'c>(&mut self, t: &'a syn::ItemTrait, types: &'b TypeResolver<'a, 'c>) {
+ for item in t.items.iter() {
+ match item {
+ &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) => {
+ assert_simple_bound(&tr);
+ if let Some(mut path) = types.maybe_resolve_path(&tr.path, None) {
+ if types.skip_path(&path) { continue; }
+ // In general we handle Deref<Target=X> as if it were just X (and
+ // implement Deref<Target=Self> for relevant types). We don't
+ // bother to implement it for associated types, however, so we just
+ // ignore such bounds.
+ let new_ident = if path != "std::ops::Deref" {
+ path = "crate::".to_string() + &path;
+ Some(&tr.path)
+ } else { None };
+ self.typed_generics.last_mut().unwrap().insert(&t.ident, (path, new_ident));
+ } else { unimplemented!(); }
+ },
+ _ => unimplemented!(),
+ }
+ if bounds_iter.next().is_some() { unimplemented!(); }
+ },
+ _ => {},
+ }
+ }
+ }
+
/// Attempt to resolve an Ident as a generic parameter and return the full path.
pub fn maybe_resolve_ident<'b>(&'b self, ident: &syn::Ident) -> Option<&'b String> {
for gen in self.typed_generics.iter().rev() {
return Some(res);
}
}
+ } else {
+ // Associated types are usually specified as "Self::Generic", so we check for that
+ // explicitly here.
+ let mut it = path.segments.iter();
+ if path.segments.len() == 2 && format!("{}", it.next().unwrap().ident) == "Self" {
+ let ident = &it.next().unwrap().ident;
+ for gen in self.typed_generics.iter().rev() {
+ if let Some(res) = gen.get(ident).map(|(a, b)| (a, b.unwrap())) {
+ return Some(res);
+ }
+ }
+ }
}
None
}
"bitcoin::secp256k1::Error" if !is_ref => Some("crate::c_types::Secp256k1Error"),
"bitcoin::blockdata::script::Script" if is_ref => Some("crate::c_types::u8slice"),
"bitcoin::blockdata::script::Script" if !is_ref => Some("crate::c_types::derived::CVec_u8Z"),
- "bitcoin::blockdata::transaction::OutPoint" if is_ref => Some("crate::chain::transaction::OutPoint"),
+ "bitcoin::blockdata::transaction::OutPoint" => Some("crate::chain::transaction::OutPoint"),
"bitcoin::blockdata::transaction::Transaction" => Some("crate::c_types::Transaction"),
"bitcoin::blockdata::transaction::TxOut" if !is_ref => Some("crate::c_types::TxOut"),
- "bitcoin::OutPoint" => Some("crate::chain::transaction::OutPoint"),
"bitcoin::network::constants::Network" => Some("crate::bitcoin::network::Network"),
"bitcoin::blockdata::block::BlockHeader" if is_ref => Some("*const [u8; 80]"),
"bitcoin::blockdata::block::Block" if is_ref => Some("crate::c_types::u8slice"),
"bitcoin::hash_types::Txid" if !is_ref => Some("crate::c_types::ThirtyTwoBytes"),
"bitcoin::hash_types::BlockHash" if is_ref => Some("*const [u8; 32]"),
"bitcoin::hash_types::BlockHash" if !is_ref => Some("crate::c_types::ThirtyTwoBytes"),
+ "bitcoin::secp256k1::Message" if !is_ref => Some("crate::c_types::ThirtyTwoBytes"),
"ln::channelmanager::PaymentHash" if is_ref => Some("*const [u8; 32]"),
"ln::channelmanager::PaymentHash" if !is_ref => Some("crate::c_types::ThirtyTwoBytes"),
"ln::channelmanager::PaymentPreimage" if is_ref => Some("*const [u8; 32]"),
"bitcoin::blockdata::script::Script" if is_ref => Some("crate::c_types::u8slice::from_slice(&"),
"bitcoin::blockdata::script::Script" if !is_ref => Some(""),
"bitcoin::blockdata::transaction::Transaction" => Some("crate::c_types::Transaction::from_vec(local_"),
+ "bitcoin::blockdata::transaction::OutPoint" => Some("crate::c_types::bitcoin_to_C_outpoint("),
"bitcoin::blockdata::transaction::TxOut" if !is_ref => Some("crate::c_types::TxOut::from_rust("),
"bitcoin::blockdata::block::BlockHeader" if is_ref => Some("&local_"),
"bitcoin::blockdata::block::Block" if is_ref => Some("crate::c_types::u8slice::from_slice(&local_"),
"bitcoin::hash_types::Txid" if is_ref => Some(""),
"bitcoin::hash_types::BlockHash" if is_ref => Some(""),
"bitcoin::hash_types::BlockHash" => Some("crate::c_types::ThirtyTwoBytes { data: "),
+ "bitcoin::secp256k1::Message" if !is_ref => Some("crate::c_types::ThirtyTwoBytes { data: "),
"ln::channelmanager::PaymentHash" if is_ref => Some("&"),
"ln::channelmanager::PaymentHash" if !is_ref => Some("crate::c_types::ThirtyTwoBytes { data: "),
"ln::channelmanager::PaymentPreimage" if is_ref => Some("&"),
"bitcoin::blockdata::script::Script" if is_ref => Some("[..])"),
"bitcoin::blockdata::script::Script" if !is_ref => Some(".into_bytes().into()"),
"bitcoin::blockdata::transaction::Transaction" => Some(")"),
+ "bitcoin::blockdata::transaction::OutPoint" => Some(")"),
"bitcoin::blockdata::transaction::TxOut" if !is_ref => Some(")"),
"bitcoin::blockdata::block::BlockHeader" if is_ref => Some(""),
"bitcoin::blockdata::block::Block" if is_ref => Some(")"),
"bitcoin::hash_types::Txid" if is_ref => Some(".as_inner()"),
"bitcoin::hash_types::BlockHash" if is_ref => Some(".as_inner()"),
"bitcoin::hash_types::BlockHash" => Some(".into_inner() }"),
+ "bitcoin::secp256k1::Message" if !is_ref => Some(".as_ref().clone() }"),
"ln::channelmanager::PaymentHash" if is_ref => Some(".0"),
"ln::channelmanager::PaymentHash" => Some(".0 }"),
"ln::channelmanager::PaymentPreimage" if is_ref => Some(".0"),
decl_lookup(w, &DeclType::StructImported, &resolved_path, is_ref, is_mut);
} else if self.crate_types.mirrored_enums.get(&resolved_path).is_some() {
decl_lookup(w, &DeclType::MirroredEnum, &resolved_path, is_ref, is_mut);
+ } else if let Some(t) = self.crate_types.traits.get(&resolved_path) {
+ decl_lookup(w, &DeclType::Trait(t), &resolved_path, is_ref, is_mut);
} else if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
- if let Some(t) = self.crate_types.traits.get(&resolved_path) {
- decl_lookup(w, &DeclType::Trait(t), &resolved_path, is_ref, is_mut);
- return;
- } else if let Some(_) = self.imports.get(ident) {
+ if let Some(_) = self.imports.get(ident) {
// crate_types lookup has to have succeeded:
panic!("Failed to print inline conversion for {}", ident);
} else if let Some(decl_type) = self.declared.get(ident) {
decl_lookup(w, decl_type, &self.maybe_resolve_ident(ident).unwrap(), is_ref, is_mut);
} else { unimplemented!(); }
- }
+ } else { unimplemented!(); }
},
syn::Type::Array(a) => {
// We assume all arrays contain only [int_literal; X]s.
DeclType::EnumIgnored|DeclType::StructImported if !is_ref =>
write!(w, "crate::{} {{ inner: Box::into_raw(Box::new(", decl_path).unwrap(),
DeclType::Trait(_) if is_ref => write!(w, "&").unwrap(),
+ DeclType::Trait(_) if !is_ref => {},
_ => panic!("{:?}", decl_path),
}
});
write!(w, ", is_owned: true }}").unwrap(),
DeclType::EnumIgnored|DeclType::StructImported if !is_ref => write!(w, ")), is_owned: true }}").unwrap(),
DeclType::Trait(_) if is_ref => {},
+ DeclType::Trait(_) => {
+ // This is used when we're converting a concrete Rust type into a C trait
+ // for use when a Rust trait method returns an associated type.
+ // Because all of our C traits implement From<RustTypesImplementingTraits>
+ // we can just call .into() here and be done.
+ write!(w, ".into()").unwrap()
+ },
_ => unimplemented!(),
});
}
self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(path), generics,
&format!("{}", single_ident_generic_path_to_ident(path).unwrap()), is_ref, false, false, false);
} else {
- self.write_template_generics(w, &mut [$item].iter().map(|t| *t), is_ref, true);
+ self.write_template_generics(w, &mut [$item].iter().map(|t| *t), generics, is_ref, true);
}
} else if let syn::Type::Tuple(syn::TypeTuple { elems, .. }) = $item {
self.write_c_mangled_container_path_intern(w, elems.iter().collect(), generics,
&format!("{}Tuple", elems.len()), is_ref, false, false, false);
} else { unimplemented!(); }
write!(w, ") -> {} =\n\t{}::CResultTempl::<", mangled_container, Self::container_templ_path()).unwrap();
- self.write_template_generics(w, &mut args.iter().map(|t| *t), is_ref, true);
+ self.write_template_generics(w, &mut args.iter().map(|t| *t), generics, is_ref, true);
writeln!(w, ">::{};\n", $call).unwrap();
} }
}
}
}
- fn write_template_generics<'b, W: std::io::Write>(&self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, is_ref: bool, in_crate: bool) {
+ fn write_template_generics<'b, W: std::io::Write>(&self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, generics: Option<&GenericTypes>, is_ref: bool, in_crate: bool) {
for (idx, t) in args.enumerate() {
if idx != 0 {
write!(w, ", ").unwrap();
write!(w, "u8").unwrap();
} else {
write!(w, "{}::C{}TupleTempl<", Self::container_templ_path(), tup.elems.len()).unwrap();
- self.write_template_generics(w, &mut tup.elems.iter(), is_ref, in_crate);
+ self.write_template_generics(w, &mut tup.elems.iter(), generics, is_ref, in_crate);
write!(w, ">").unwrap();
}
} else if let syn::Type::Path(p_arg) = t {
- let resolved_generic = self.resolve_path(&p_arg.path, None);
+ let resolved_generic = self.resolve_path(&p_arg.path, generics);
if self.is_primitive(&resolved_generic) {
write!(w, "{}", resolved_generic).unwrap();
} else if let Some(c_type) = self.c_type_from_path(&resolved_generic, is_ref, false) {
if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments {
self.write_template_generics(w, &mut args.args.iter().map(|gen|
if let syn::GenericArgument::Type(t) = gen { t } else { unimplemented!() }),
- is_ref, in_crate);
+ generics, is_ref, in_crate);
} else { unimplemented!(); }
write!(w, ">").unwrap();
} else if resolved_generic == "Option" {
if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments {
self.write_template_generics(w, &mut args.args.iter().map(|gen|
if let syn::GenericArgument::Type(t) = gen { t } else { unimplemented!() }),
- is_ref, in_crate);
+ generics, is_ref, in_crate);
} else { unimplemented!(); }
} else if in_crate {
write!(w, "{}", c_type).unwrap();
} else {
- self.write_rust_type(w, None, &t);
+ self.write_rust_type(w, generics, &t);
}
} else {
// If we just write out resolved_generic, it may mostly work, however for
}
} else if let syn::Type::Reference(r_arg) = t {
if let syn::Type::Path(p_arg) = &*r_arg.elem {
- let resolved = self.resolve_path(&p_arg.path, None);
+ let resolved = self.resolve_path(&p_arg.path, generics);
if self.crate_types.opaques.get(&resolved).is_some() {
write!(w, "crate::{}", resolved).unwrap();
} else {
} else { unimplemented!(); }
} else if let syn::Type::Array(a_arg) = t {
if let syn::Type::Path(p_arg) = &*a_arg.elem {
- let resolved = self.resolve_path(&p_arg.path, None);
+ let resolved = self.resolve_path(&p_arg.path, generics);
assert!(self.is_primitive(&resolved));
if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a_arg.len {
write!(w, "{}",
write!(&mut created_container, "#[no_mangle]\npub type {} = ", mangled_container).unwrap();
write!(&mut created_container, "{}::C{}Templ<", Self::container_templ_path(), container_type).unwrap();
- self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), is_ref, true);
+ self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), generics, is_ref, true);
writeln!(&mut created_container, ">;").unwrap();
write!(&mut created_container, "#[no_mangle]\npub static {}_free: extern \"C\" fn({}) = ", mangled_container, mangled_container).unwrap();
write!(&mut created_container, "{}::C{}Templ_free::<", Self::container_templ_path(), container_type).unwrap();
- self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), is_ref, true);
+ self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), generics, is_ref, true);
writeln!(&mut created_container, ">;").unwrap();
self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, generics, is_ref);
projects / rust-lightning / blobdiff