[bindings] Push generic resolution into resolve_path
[rust-lightning] / c-bindings-gen / src / types.rs
index 1db824d43128fc7675de4f7d6e0a3aaaa89c3056..e24add068da4a22e7bee92b486990834ce9bda9f 100644 (file)
@@ -144,7 +144,7 @@ impl<'a> GenericTypes<'a> {
                                                        }
 
                                                        assert_simple_bound(&trait_bound);
-                                                       if let Some(mut path) = types.maybe_resolve_path(&trait_bound.path) {
+                                                       if let Some(mut path) = types.maybe_resolve_path(&trait_bound.path, None) {
                                                                if types.skip_path(&path) { continue; }
                                                                if non_lifetimes_processed { return false; }
                                                                non_lifetimes_processed = true;
@@ -177,7 +177,7 @@ impl<'a> GenericTypes<'a> {
                                                                        if non_lifetimes_processed { return false; }
                                                                        non_lifetimes_processed = true;
                                                                        assert_simple_bound(&trait_bound);
-                                                                       *gen = ("crate::".to_string() + &types.resolve_path(&trait_bound.path),
+                                                                       *gen = ("crate::".to_string() + &types.resolve_path(&trait_bound.path, None),
                                                                                Some(&trait_bound.path));
                                                                }
                                                        }
@@ -700,7 +700,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        },
                        "Option" => {
                                if let Some(syn::Type::Path(p)) = single_contained {
-                                       if self.c_type_has_inner_from_path(&self.resolve_path(&p.path)) {
+                                       if self.c_type_has_inner_from_path(&self.resolve_path(&p.path, None)) {
                                                if is_ref {
                                                        return Some(("if ", vec![
                                                                (".is_none() { std::ptr::null() } else { ".to_owned(), format!("({}.as_ref().unwrap())", var_access))
@@ -746,7 +746,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        },
                        "Option" => {
                                if let Some(syn::Type::Path(p)) = single_contained {
-                                       if self.c_type_has_inner_from_path(&self.resolve_path(&p.path)) {
+                                       if self.c_type_has_inner_from_path(&self.resolve_path(&p.path, None)) {
                                                if is_ref {
                                                        return Some(("if ", vec![(".inner.is_null() { None } else { Some((*".to_string(), format!("{}", var_name))], ").clone()) }"))
                                                } else {
@@ -868,7 +868,13 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                } else { None }
        }
 
-       pub fn maybe_resolve_path(&self, p: &syn::Path) -> Option<String> {
+       pub fn maybe_resolve_path(&self, p_arg: &syn::Path, generics: Option<&GenericTypes>) -> Option<String> {
+               let p = if let Some(gen_types) = generics {
+                       if let Some((_, synpath)) = gen_types.maybe_resolve_path(p_arg) {
+                               synpath
+                       } else { p_arg }
+               } else { p_arg };
+
                if p.leading_colon.is_some() {
                        // At some point we may need this, but for now, its unused, so just fail.
                        return None;
@@ -897,8 +903,8 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        } else { None }
                }
        }
-       pub fn resolve_path(&self, p: &syn::Path) -> String {
-               self.maybe_resolve_path(p).unwrap()
+       pub fn resolve_path(&self, p: &syn::Path, generics: Option<&GenericTypes>) -> String {
+               self.maybe_resolve_path(p, generics).unwrap()
        }
 
        // ***********************************
@@ -906,7 +912,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
        // ***********************************
 
        fn write_rust_path<W: std::io::Write>(&self, w: &mut W, path: &syn::Path) {
-               if let Some(resolved) = self.maybe_resolve_path(&path) {
+               if let Some(resolved) = self.maybe_resolve_path(&path, None) {
                        if self.is_primitive(&resolved) {
                                write!(w, "{}", path.get_ident().unwrap()).unwrap();
                        } else {
@@ -1020,7 +1026,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
        pub fn write_empty_rust_val<W: std::io::Write>(&self, w: &mut W, t: &syn::Type) {
                match t {
                        syn::Type::Path(p) => {
-                               let resolved = self.resolve_path(&p.path);
+                               let resolved = self.resolve_path(&p.path, None);
                                if self.crate_types.opaques.get(&resolved).is_some() {
                                        write!(w, "crate::{} {{ inner: std::ptr::null_mut(), is_owned: true }}", resolved).unwrap();
                                } else {
@@ -1053,7 +1059,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
        pub fn write_empty_rust_val_check_suffix<W: std::io::Write>(&self, w: &mut W, t: &syn::Type) -> bool {
                match t {
                        syn::Type::Path(p) => {
-                               let resolved = self.resolve_path(&p.path);
+                               let resolved = self.resolve_path(&p.path, None);
                                if self.crate_types.opaques.get(&resolved).is_some() {
                                        write!(w, ".inner.is_null()").unwrap();
                                        false
@@ -1119,12 +1125,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                match t {
                        syn::Type::Path(p) => {
                                if p.qself.is_some() { unimplemented!(); }
-                               if let Some(gen_types) = generics {
-                                       if let Some(resolved) = gen_types.maybe_resolve_path(&p.path) {
-                                               return self.skip_path(resolved.0);
-                                       }
-                               }
-                               if let Some(full_path) = self.maybe_resolve_path(&p.path) {
+                               if let Some(full_path) = self.maybe_resolve_path(&p.path, generics) {
                                        self.skip_path(&full_path)
                                } else { false }
                        },
@@ -1138,13 +1139,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                match t {
                        syn::Type::Path(p) => {
                                if p.qself.is_some() { unimplemented!(); }
-                               if let Some(gen_types) = generics {
-                                       if let Some(resolved) = gen_types.maybe_resolve_path(&p.path) {
-                                               write!(w, "{}", self.no_arg_path_to_rust(resolved.0)).unwrap();
-                                               return;
-                                       }
-                               }
-                               if let Some(full_path) = self.maybe_resolve_path(&p.path) {
+                               if let Some(full_path) = self.maybe_resolve_path(&p.path, generics) {
                                        write!(w, "{}", self.no_arg_path_to_rust(&full_path)).unwrap();
                                }
                        },
@@ -1169,30 +1164,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                        unimplemented!();
                                }
 
-                               if let Some(gen_types) = generics {
-                                       if let Some((_, synpath)) = gen_types.maybe_resolve_path(&p.path) {
-                                               let genpath = self.resolve_path(&synpath);
-                                               assert!(!self.is_known_container(&genpath, is_ref) && !self.is_transparent_container(&genpath, is_ref));
-                                               if let Some(c_type) = path_lookup(&genpath, is_ref, ptr_for_ref) {
-                                                       write!(w, "{}", c_type).unwrap();
-                                                       return;
-                                               } else {
-                                                       let synident = single_ident_generic_path_to_ident(synpath).unwrap();
-                                                       if let Some(t) = self.crate_types.traits.get(&genpath) {
-                                                               decl_lookup(w, &DeclType::Trait(t), &genpath, is_ref, is_mut);
-                                                               return;
-                                                       } else if let Some(_) = self.imports.get(synident) {
-                                                               // crate_types lookup has to have succeeded:
-                                                               panic!("Failed to print inline conversion for {}", synident);
-                                                       } else if let Some(decl_type) = self.declared.get(synident) {
-                                                               decl_lookup(w, decl_type, &self.maybe_resolve_path(synpath).unwrap(), is_ref, is_mut);
-                                                               return;
-                                                       } else { unimplemented!(); }
-                                               }
-                                       }
-                               }
-
-                               let resolved_path = self.resolve_path(&p.path);
+                               let resolved_path = self.resolve_path(&p.path, generics);
                                if let Some(c_type) = path_lookup(&resolved_path, is_ref, ptr_for_ref) {
                                        write!(w, "{}", c_type).unwrap();
                                } else if self.crate_types.opaques.get(&resolved_path).is_some() {
@@ -1200,7 +1172,10 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                } 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(ident) = single_ident_generic_path_to_ident(&p.path) {
-                                       if let Some(_) = self.imports.get(ident) {
+                                       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) {
                                                // 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) {
@@ -1221,12 +1196,12 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                // We assume all slices contain only literals or references.
                                // This may result in some outputs not compiling.
                                if let syn::Type::Path(p) = &*s.elem {
-                                       let resolved = self.resolve_path(&p.path);
+                                       let resolved = self.resolve_path(&p.path, generics);
                                        assert!(self.is_primitive(&resolved));
                                        write!(w, "{}", path_lookup("[u8]", is_ref, ptr_for_ref).unwrap()).unwrap();
                                } else if let syn::Type::Reference(r) = &*s.elem {
                                        if let syn::Type::Path(p) = &*r.elem {
-                                               write!(w, "{}", sliceconv(self.c_type_has_inner_from_path(&self.resolve_path(&p.path)))).unwrap();
+                                               write!(w, "{}", sliceconv(self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics)))).unwrap();
                                        } else { unimplemented!(); }
                                } else { unimplemented!(); }
                        },
@@ -1379,10 +1354,10 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                        }
                                        if let syn::Type::Reference(t) = ty {
                                                if let syn::Type::Path(p) = &*t.elem {
-                                                       self.c_type_has_inner_from_path(&self.resolve_path(&p.path))
+                                                       self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics))
                                                } else { false }
                                        } else if let syn::Type::Path(p) = ty {
-                                               self.c_type_has_inner_from_path(&self.resolve_path(&p.path))
+                                               self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics))
                                        } else { false }
                                } else { true };
 
@@ -1474,16 +1449,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                if p.qself.is_some() || p.path.leading_colon.is_some() {
                                        unimplemented!();
                                }
-                               if let Some(gen_types) = generics {
-                                       if let Some(resolved) = gen_types.maybe_resolve_path(&p.path) {
-                                               assert!(!self.is_known_container(&resolved.0, is_ref) && !self.is_transparent_container(&resolved.0, is_ref));
-                                               if let Some((prefix, suffix)) = path_lookup(&resolved.0, is_ref) {
-                                                       write!(w, "let mut local_{} = {}{}{};", ident, prefix, var, suffix).unwrap();
-                                                       return true;
-                                               } else { return false; }
-                                       }
-                               }
-                               let resolved_path = self.resolve_path(&p.path);
+                               let resolved_path = self.resolve_path(&p.path, generics);
                                if self.is_known_container(&resolved_path, is_ref) || self.is_transparent_container(&resolved_path, is_ref) {
                                        if let syn::PathArguments::AngleBracketed(args) = &p.path.segments.iter().next().unwrap().arguments {
                                                convert_container!(resolved_path, args.args.len(), || args.args.iter().map(|arg| {
@@ -1511,7 +1477,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        },
                        syn::Type::Slice(s) => {
                                if let syn::Type::Path(p) = &*s.elem {
-                                       let resolved = self.resolve_path(&p.path);
+                                       let resolved = self.resolve_path(&p.path, generics);
                                        assert!(self.is_primitive(&resolved));
                                        let slice_path = format!("[{}]", resolved);
                                        if let Some((prefix, suffix)) = path_lookup(&slice_path, true) {
@@ -1548,7 +1514,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                                                // Opaque types with inner pointers shouldn't ever create new stack
                                                                // variables, so we don't handle it and just assert that it doesn't
                                                                // here.
-                                                               assert!(!self.c_type_has_inner_from_path(&self.resolve_path(&p.path)));
+                                                               assert!(!self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics)));
                                                        }
                                                }
                                        }
@@ -1563,10 +1529,10 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                                                }
                                                                if let syn::Type::Reference(t) = elem {
                                                                        if let syn::Type::Path(p) = &*t.elem {
-                                                                               self.c_type_has_inner_from_path(&self.resolve_path(&p.path))
+                                                                               self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics))
                                                                        } else { false }
                                                                } else if let syn::Type::Path(p) = elem {
-                                                                       self.c_type_has_inner_from_path(&self.resolve_path(&p.path))
+                                                                       self.c_type_has_inner_from_path(&self.resolve_path(&p.path, generics))
                                                                } else { false }
                                                        };
                                                if idx != 0 { write!(w, ", ").unwrap(); }
@@ -1616,7 +1582,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
        // *** 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>, is_ref: bool) {
+       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) {
                if container_type == "Result" {
                        assert_eq!(args.len(), 2);
                        macro_rules! write_fn {
@@ -1629,15 +1595,15 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                ($call: expr, $item: expr) => { {
                                        write!(w, "#[no_mangle]\npub static {}_{}: extern \"C\" fn (", mangled_container, $call).unwrap();
                                        if let syn::Type::Path(syn::TypePath { path, .. }) = $item {
-                                               let resolved = self.resolve_path(path);
+                                               let resolved = self.resolve_path(path, generics);
                                                if self.is_known_container(&resolved, is_ref) || self.is_transparent_container(&resolved, is_ref) {
-                                                       self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(path),
+                                                       self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(path), generics,
                                                                &format!("{}", single_ident_generic_path_to_ident(path).unwrap()), is_ref, false, false, false);
                                                } else {
                                                        self.write_template_generics(w, &mut [$item].iter().map(|t| *t), is_ref, true);
                                                }
                                        } else if let syn::Type::Tuple(syn::TypeTuple { elems, .. }) = $item {
-                                               self.write_c_mangled_container_path_intern(w, elems.iter().collect(),
+                                               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();
@@ -1657,7 +1623,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        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();
-                               self.write_c_type_intern(None, w, gen, false, false, false);
+                               self.write_c_type_intern(w, gen, None, false, false, false);
                        }
                        writeln!(w, ") -> {} {{", mangled_container).unwrap();
                        writeln!(w, "\t{} {{", mangled_container).unwrap();
@@ -1684,7 +1650,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                        write!(w, ">").unwrap();
                                }
                        } else if let syn::Type::Path(p_arg) = t {
-                               let resolved_generic = self.resolve_path(&p_arg.path);
+                               let resolved_generic = self.resolve_path(&p_arg.path, None);
                                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) {
@@ -1726,7 +1692,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                }
                        } 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);
+                                       let resolved = self.resolve_path(&p_arg.path, None);
                                        if single_ident_generic_path_to_ident(&p_arg.path).is_some() {
                                                if self.crate_types.opaques.get(&resolved).is_some() {
                                                        write!(w, "crate::{}", resolved).unwrap();
@@ -1735,7 +1701,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                } 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);
+                                       let resolved = self.resolve_path(&p_arg.path, None);
                                        assert!(self.is_primitive(&resolved));
                                        if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a_arg.len {
                                                write!(w, "{}",
@@ -1745,7 +1711,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        }
                }
        }
-       fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, is_ref: bool) {
+       fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) {
                if !self.crate_types.templates_defined.get(&mangled_container).is_some() {
                        self.crate_types.templates_defined.insert(mangled_container.clone(), true);
                        let mut created_container: Vec<u8> = Vec::new();
@@ -1760,7 +1726,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), is_ref, true);
                        writeln!(&mut created_container, ">;").unwrap();
 
-                       self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, is_ref);
+                       self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, generics, is_ref);
 
                        self.crate_types.template_file.write(&created_container).unwrap();
                }
@@ -1771,7 +1737,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                } else { unimplemented!(); }
        }
        fn write_c_mangled_container_path_intern<W: std::io::Write>
-                       (&mut self, w: &mut W, args: Vec<&syn::Type>, ident: &str, is_ref: bool, is_mut: bool, ptr_for_ref: bool, in_type: bool) -> bool {
+                       (&mut self, w: &mut W, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, ident: &str, is_ref: bool, is_mut: bool, ptr_for_ref: bool, in_type: bool) -> bool {
                let mut mangled_type: Vec<u8> = Vec::new();
                if !self.is_transparent_container(ident, is_ref) {
                        write!(w, "C{}_", ident).unwrap();
@@ -1780,7 +1746,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                for arg in args.iter() {
                        macro_rules! write_path {
                                ($p_arg: expr, $extra_write: expr) => {
-                                       let subtype = self.resolve_path(&$p_arg.path);
+                                       let subtype = self.resolve_path(&$p_arg.path, generics);
                                        if self.is_transparent_container(ident, is_ref) {
                                                // We dont (yet) support primitives or containers inside transparent
                                                // containers, so check for that first:
@@ -1788,9 +1754,9 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                                if self.is_known_container(&subtype, is_ref) { return false; }
                                                if !in_type {
                                                        if self.c_type_has_inner_from_path(&subtype) {
-                                                               if !self.write_c_path_intern(w, &$p_arg.path, is_ref, is_mut, ptr_for_ref) { return false; }
+                                                               if !self.write_c_path_intern(w, &$p_arg.path, generics, is_ref, is_mut, ptr_for_ref) { return false; }
                                                        } else {
-                                                               if !self.write_c_path_intern(w, &$p_arg.path, true, is_mut, true) { return false; }
+                                                               if !self.write_c_path_intern(w, &$p_arg.path, generics, true, is_mut, true) { return false; }
                                                        }
                                                } else {
                                                        if $p_arg.path.segments.len() == 1 {
@@ -1800,15 +1766,15 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                                        }
                                                }
                                        } else if self.is_known_container(&subtype, is_ref) || self.is_transparent_container(&subtype, is_ref) {
-                                               if !self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(&$p_arg.path),
+                                               if !self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(&$p_arg.path), generics,
                                                                &subtype, is_ref, is_mut, ptr_for_ref, true) {
                                                        return false;
                                                }
                                                self.write_c_mangled_container_path_intern(&mut mangled_type, Self::path_to_generic_args(&$p_arg.path),
-                                                       &subtype, is_ref, is_mut, ptr_for_ref, true);
+                                                       generics, &subtype, is_ref, is_mut, ptr_for_ref, true);
                                                if let Some(w2) = $extra_write as Option<&mut Vec<u8>> {
                                                        self.write_c_mangled_container_path_intern(w2, Self::path_to_generic_args(&$p_arg.path),
-                                                               &subtype, is_ref, is_mut, ptr_for_ref, true);
+                                                               generics, &subtype, is_ref, is_mut, ptr_for_ref, true);
                                                }
                                        } else if let Some(id) = single_ident_generic_path_to_ident(&$p_arg.path) {
                                                write!(w, "{}", id).unwrap();
@@ -1842,7 +1808,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                        write!(mangled_type, "Z").unwrap();
                                        write!(mangled_tuple_type, "Z").unwrap();
                                        self.check_create_container(String::from_utf8(mangled_tuple_type).unwrap(),
-                                               &format!("{}Tuple", tuple.elems.len()), tuple.elems.iter().collect(), is_ref);
+                                               &format!("{}Tuple", tuple.elems.len()), tuple.elems.iter().collect(), generics, is_ref);
                                }
                        } else if let syn::Type::Path(p_arg) = arg {
                                write_path!(p_arg, None);
@@ -1860,7 +1826,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                } else { return false; }
                        } else if let syn::Type::Array(a) = arg {
                                if let syn::Type::Path(p_arg) = &*a.elem {
-                                       let resolved = self.resolve_path(&p_arg.path);
+                                       let resolved = self.resolve_path(&p_arg.path, generics);
                                        if !self.is_primitive(&resolved) { return false; }
                                        if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a.len {
                                                if self.c_type_from_path(&format!("[{}; {}]", resolved, len.base10_digits()), is_ref, ptr_for_ref).is_none() { return false; }
@@ -1876,23 +1842,22 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                write!(mangled_type, "Z").unwrap();
 
                // Make sure the type is actually defined:
-               self.check_create_container(String::from_utf8(mangled_type).unwrap(), ident, args, is_ref);
+               self.check_create_container(String::from_utf8(mangled_type).unwrap(), ident, args, generics, is_ref);
                true
        }
-       fn write_c_mangled_container_path<W: std::io::Write>(&mut self, w: &mut W, args: Vec<&syn::Type>, ident: &str, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
+       fn write_c_mangled_container_path<W: std::io::Write>(&mut self, w: &mut W, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, ident: &str, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
                if !self.is_transparent_container(ident, is_ref) {
                        write!(w, "{}::", Self::generated_container_path()).unwrap();
                }
-               self.write_c_mangled_container_path_intern(w, args, ident, is_ref, is_mut, ptr_for_ref, false)
+               self.write_c_mangled_container_path_intern(w, args, generics, ident, is_ref, is_mut, ptr_for_ref, false)
        }
 
        // **********************************
        // *** C Type Equivalent Printing ***
        // **********************************
 
-       fn write_c_path_intern<W: std::io::Write>(&self, w: &mut W, path: &syn::Path, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
-//eprintln!("pcpi ({} {} {}): {:?}", is_ref, is_mut, ptr_for_ref, path);
-               let full_path = match self.maybe_resolve_path(&path) {
+       fn write_c_path_intern<W: std::io::Write>(&self, w: &mut W, path: &syn::Path, generics: Option<&GenericTypes>, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
+               let full_path = match self.maybe_resolve_path(&path, generics) {
                        Some(path) => path, None => return false };
                if let Some(c_type) = self.c_type_from_path(&full_path, is_ref, ptr_for_ref) {
                        write!(w, "{}", c_type).unwrap();
@@ -1923,43 +1888,36 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        false
                }
        }
-       fn write_c_type_intern<W: std::io::Write>(&mut self, generics: Option<&GenericTypes>, w: &mut W, t: &syn::Type, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
+       fn write_c_type_intern<W: std::io::Write>(&mut self, w: &mut W, t: &syn::Type, generics: Option<&GenericTypes>, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool {
                match t {
                        syn::Type::Path(p) => {
                                if p.qself.is_some() || p.path.leading_colon.is_some() {
                                        return false;
                                }
-                               if let Some(gen_types) = generics {
-                                       if let Some(resolved) = gen_types.maybe_resolve_path(&p.path) {
-                                               if self.is_known_container(&resolved.0, is_ref) { return false; }
-                                               if self.is_transparent_container(&resolved.0, is_ref) { return false; }
-                                               return self.write_c_path_intern(w, &resolved.1, is_ref, is_mut, ptr_for_ref);
-                                       }
-                               }
-                               if let Some(full_path) = self.maybe_resolve_path(&p.path) {
+                               if let Some(full_path) = self.maybe_resolve_path(&p.path, generics) {
                                        if self.is_known_container(&full_path, is_ref) || self.is_transparent_container(&full_path, is_ref) {
-                                               return self.write_c_mangled_container_path(w, Self::path_to_generic_args(&p.path), &full_path, is_ref, is_mut, ptr_for_ref);
+                                               return self.write_c_mangled_container_path(w, Self::path_to_generic_args(&p.path), generics, &full_path, is_ref, is_mut, ptr_for_ref);
                                        }
                                }
                                if p.path.leading_colon.is_some() { return false; }
-                               self.write_c_path_intern(w, &p.path, is_ref, is_mut, ptr_for_ref)
+                               self.write_c_path_intern(w, &p.path, generics, is_ref, is_mut, ptr_for_ref)
                        },
                        syn::Type::Reference(r) => {
                                if let Some(lft) = &r.lifetime {
                                        if format!("{}", lft.ident) != "static" { return false; }
                                }
-                               self.write_c_type_intern(generics, w, &*r.elem, true, r.mutability.is_some(), ptr_for_ref)
+                               self.write_c_type_intern(w, &*r.elem, generics, true, r.mutability.is_some(), ptr_for_ref)
                        },
                        syn::Type::Array(a) => {
                                if is_ref && is_mut {
                                        write!(w, "*mut [").unwrap();
-                                       if !self.write_c_type_intern(generics, w, &a.elem, false, false, ptr_for_ref) { return false; }
+                                       if !self.write_c_type_intern(w, &a.elem, generics, false, false, ptr_for_ref) { return false; }
                                } else if is_ref {
                                        write!(w, "*const [").unwrap();
-                                       if !self.write_c_type_intern(generics, w, &a.elem, false, false, ptr_for_ref) { return false; }
+                                       if !self.write_c_type_intern(w, &a.elem, generics, false, false, ptr_for_ref) { return false; }
                                } else {
                                        let mut typecheck = Vec::new();
-                                       if !self.write_c_type_intern(generics, &mut typecheck, &a.elem, false, false, ptr_for_ref) { return false; }
+                                       if !self.write_c_type_intern(&mut typecheck, &a.elem, generics, false, false, ptr_for_ref) { return false; }
                                        if typecheck[..] != ['u' as u8, '8' as u8] { return false; }
                                }
                                if let syn::Expr::Lit(l) = &a.len {
@@ -1979,7 +1937,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                        syn::Type::Slice(s) => {
                                if !is_ref || is_mut { return false; }
                                if let syn::Type::Path(p) = &*s.elem {
-                                       let resolved = self.resolve_path(&p.path);
+                                       let resolved = self.resolve_path(&p.path, generics);
                                        if self.is_primitive(&resolved) {
                                                write!(w, "{}::{}slice", Self::container_templ_path(), resolved).unwrap();
                                                true
@@ -1987,7 +1945,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                } else if let syn::Type::Reference(r) = &*s.elem {
                                        if let syn::Type::Path(p) = &*r.elem {
                                                // Slices with "real types" inside are mapped as the equivalent non-ref Vec
-                                               let resolved = self.resolve_path(&p.path);
+                                               let resolved = self.resolve_path(&p.path, generics);
                                                let mangled_container = if let Some(ident) = self.crate_types.opaques.get(&resolved) {
                                                        format!("CVec_{}Z", ident)
                                                } else if let Some(en) = self.crate_types.mirrored_enums.get(&resolved) {
@@ -1996,7 +1954,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                                        format!("CVec_{}Z", id)
                                                } else { return false; };
                                                write!(w, "{}::{}", Self::generated_container_path(), mangled_container).unwrap();
-                                               self.check_create_container(mangled_container, "Vec", vec![&*r.elem], false);
+                                               self.check_create_container(mangled_container, "Vec", vec![&*r.elem], generics, false);
                                                true
                                        } else { false }
                                } else { false }
@@ -2005,7 +1963,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                                if t.elems.len() == 0 {
                                        true
                                } else {
-                                       self.write_c_mangled_container_path(w, t.elems.iter().collect(),
+                                       self.write_c_mangled_container_path(w, t.elems.iter().collect(), generics,
                                                &format!("{}Tuple", t.elems.len()), is_ref, is_mut, ptr_for_ref)
                                }
                        },
@@ -2013,13 +1971,13 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
                }
        }
        pub fn write_c_type<W: std::io::Write>(&mut self, w: &mut W, t: &syn::Type, generics: Option<&GenericTypes>, ptr_for_ref: bool) {
-               assert!(self.write_c_type_intern(generics, w, t, false, false, ptr_for_ref));
+               assert!(self.write_c_type_intern(w, t, generics, false, false, ptr_for_ref));
        }
        pub fn understood_c_path(&mut self, p: &syn::Path) -> bool {
                if p.leading_colon.is_some() { return false; }
-               self.write_c_path_intern(&mut std::io::sink(), p, false, false, false)
+               self.write_c_path_intern(&mut std::io::sink(), p, None, false, false, false)
        }
        pub fn understood_c_type(&mut self, t: &syn::Type, generics: Option<&GenericTypes>) -> bool {
-               self.write_c_type_intern(generics, &mut std::io::sink(), t, false, false, false)
+               self.write_c_type_intern(&mut std::io::sink(), t, generics, false, false, false)
        }
 }