// *** C Container Type Equivalent and alias Printing ***
// ******************************************************
- fn write_template_constructor<W: std::io::Write>(&mut self, w: &mut W, container_type: &str, mangled_container: &str, args: &Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
- if container_type.ends_with("Tuple") {
- write!(w, "#[no_mangle]\npub extern \"C\" fn {}_new(", mangled_container).unwrap();
- for (idx, gen) in args.iter().enumerate() {
- write!(w, "{}{}: ", if idx != 0 { ", " } else { "" }, ('a' as u8 + idx as u8) as char).unwrap();
- if !self.write_c_type_intern(w, gen, None, false, false, false) { return false; }
- }
- writeln!(w, ") -> {} {{", mangled_container).unwrap();
- write!(w, "\t{} {{ ", mangled_container).unwrap();
- for idx in 0..args.len() {
- write!(w, "{}, ", ('a' as u8 + idx as u8) as char).unwrap();
- }
- writeln!(w, "}}\n}}\n").unwrap();
- } else {
- writeln!(w, "").unwrap();
- }
- true
- }
-
- fn write_template_generics<'b, W: std::io::Write>(&mut self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, generics: Option<&GenericTypes>, is_ref: bool, in_crate: bool) {
+ fn write_template_generics<'b, W: std::io::Write>(&mut self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
+ assert!(!is_ref); // We don't currently support outer reference types
for (idx, t) in args.enumerate() {
if idx != 0 {
write!(w, ", ").unwrap();
}
- if let syn::Type::Tuple(tup) = t {
- if tup.elems.is_empty() {
- write!(w, "u8").unwrap();
- } else {
- let mut inner_args = Vec::new();
- for arg in tup.elems.iter() {
- inner_args.push(arg);
- }
- assert!(self.write_c_mangled_container_path(w, inner_args, generics, &format!("{}Tuple", tup.elems.len()), is_ref, false, false));
- }
- } else if let syn::Type::Path(p_arg) = t {
- 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 self.is_known_container(&resolved_generic, is_ref) {
- assert!(resolved_generic == "Vec" || resolved_generic == "Result");
- let mut inner_args = Vec::new();
- if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments {
- for arg in args.args.iter() {
- if let syn::GenericArgument::Type(t) = arg { inner_args.push(t) } else { unimplemented!() };
- }
- } else { unimplemented!(); }
- assert!(self.write_c_mangled_container_path(w, inner_args, generics, &resolved_generic, is_ref, false, false));
- } 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!() }),
- generics, is_ref, in_crate);
- } else { unimplemented!(); }
- } else if in_crate {
- write!(w, "{}", c_type).unwrap();
- } else {
- self.write_rust_type(w, generics, &t);
- }
- } else {
- // If we just write out resolved_generic, it may mostly work, however for
- // original types which are generic, we need the template args. We could
- // figure them out and write them out, too, but its much easier to just
- // reference the native{} type alias which exists at least for opaque types.
- if in_crate {
- write!(w, "crate::{}", resolved_generic).unwrap();
- } else {
- let path_name: Vec<&str> = resolved_generic.rsplitn(2, "::").collect();
- if path_name.len() > 1 {
- write!(w, "crate::{}::native{}", path_name[1], path_name[0]).unwrap();
- } else {
- write!(w, "crate::native{}", path_name[0]).unwrap();
- }
- }
- }
- } else if let syn::Type::Reference(r_arg) = t {
+ if let syn::Type::Reference(r_arg) = t {
+ if !self.write_c_type_intern(w, &*r_arg.elem, generics, false, false, false) { return false; }
+
+ // While write_c_type_intern, above is correct, we don't want to blindly convert a
+ // reference to something stupid, so check that the container is either opaque or a
+ // predefined type (currently only Transaction).
if let syn::Type::Path(p_arg) = &*r_arg.elem {
let resolved = self.resolve_path(&p_arg.path, generics);
- if self.crate_types.opaques.get(&resolved).is_some() {
- write!(w, "crate::{}", resolved).unwrap();
- } else {
- let cty = self.c_type_from_path(&resolved, true, true).expect("Template generics should be opaque or have a predefined mapping");
- w.write(cty.as_bytes()).unwrap();
- }
+ assert!(self.crate_types.opaques.get(&resolved).is_some() ||
+ self.c_type_from_path(&resolved, true, true).is_some(), "Template generics should be opaque or have a predefined mapping");
} 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, generics);
- assert!(self.is_primitive(&resolved));
- if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a_arg.len {
- write!(w, "{}",
- self.c_type_from_path(&format!("[{}; {}]", resolved, len.base10_digits()), is_ref, false).unwrap()).unwrap();
- }
- }
+ } else {
+ if !self.write_c_type_intern(w, t, generics, false, false, false) { return false; }
}
}
+ true
}
fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
if !self.crate_types.templates_defined.get(&mangled_container).is_some() {
if tup.elems.is_empty() {
write!(&mut a_ty, "()").unwrap();
} else {
- self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref, true);
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; }
}
} else {
- self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref, true);
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; }
}
let mut b_ty: Vec<u8> = Vec::new();
if tup.elems.is_empty() {
write!(&mut b_ty, "()").unwrap();
} else {
- self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref, true);
+ if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; }
}
} else {
- self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref, true);
+ if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; }
}
write_result_block(&mut created_container, &mangled_container, &String::from_utf8(a_ty).unwrap(), &String::from_utf8(b_ty).unwrap());
} else if container_type == "Vec" {
let mut a_ty: Vec<u8> = Vec::new();
- self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t), generics, is_ref, true);
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t), generics, is_ref) { return false; }
write_vec_block(&mut created_container, &mangled_container, &String::from_utf8(a_ty).unwrap());
} else if container_type.ends_with("Tuple") {
let mut tuple_args = Vec::new();
for arg in args.iter() {
let mut ty: Vec<u8> = Vec::new();
- self.write_template_generics(&mut ty, &mut [arg].iter().map(|t| **t), generics, is_ref, true);
+ if !self.write_template_generics(&mut ty, &mut [arg].iter().map(|t| **t), generics, is_ref) { return false; }
tuple_args.push(String::from_utf8(ty).unwrap());
}
write_tuple_block(&mut created_container, &mangled_container, &tuple_args);
projects / rust-lightning / commitdiff