[bindings] Drop some stale code from bindings generic generation

[rust-lightning] / c-bindings-gen / src / main.rs

diff --git a/c-bindings-gen/src/main.rs b/c-bindings-gen/src/main.rs
index 9bedbf577a7d43901e1c1a23e256e7db4b719b9c..8d158e2f4816ae2997ad4aa6be404d45ef7f76c2 100644 (file)
--- a/c-bindings-gen/src/main.rs
+++ b/c-bindings-gen/src/main.rs
@@ -38,7 +38,7 @@ fn convert_macro<W: std::io::Write>(w: &mut W, macro_path: &syn::Path, stream: &
                        if let Some(s) = types.maybe_resolve_ident(&struct_for) {
                                if !types.crate_types.opaques.get(&s).is_some() { return; }
                                writeln!(w, "#[no_mangle]").unwrap();
-                               writeln!(w, "pub extern \"C\" fn {}_write(obj: *const {}) -> crate::c_types::derived::CVec_u8Z {{", struct_for, struct_for).unwrap();
+                               writeln!(w, "pub extern \"C\" fn {}_write(obj: &{}) -> crate::c_types::derived::CVec_u8Z {{", struct_for, struct_for).unwrap();
                                writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &(*(*obj).inner) }})").unwrap();
                                writeln!(w, "}}").unwrap();
                                writeln!(w, "#[no_mangle]").unwrap();
@@ -65,7 +65,7 @@ fn maybe_convert_trait_impl<W: std::io::Write>(w: &mut W, trait_path: &syn::Path
                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() {
+                       if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
                                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)));
@@ -83,7 +83,7 @@ fn maybe_convert_trait_impl<W: std::io::Write>(w: &mut W, trait_path: &syn::Path
                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, full_obj_path).unwrap();
+                               writeln!(w, "pub extern \"C\" fn {}_write(obj: &{}) -> 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,
@@ -706,6 +706,11 @@ fn writeln_struct<'a, 'b, W: std::io::Write>(w: &mut W, s: &'a syn::ItemStruct,
 ///
 /// 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) {
+       match export_status(&i.attrs) {
+               ExportStatus::Export => {},
+               ExportStatus::NoExport|ExportStatus::TestOnly => return,
+       }
+
        if let syn::Type::Tuple(_) = &*i.self_ty {
                if types.understood_c_type(&*i.self_ty, None) {
                        let mut gen_types = GenericTypes::new();
@@ -785,7 +790,7 @@ fn writeln_impl<W: std::io::Write>(w: &mut W, i: &syn::ItemImpl, types: &mut Typ
                                                writeln!(w, "\t\tret.free = Some({}_free_void);", ident).unwrap();
                                                writeln!(w, "\t\tret\n\t}}\n}}").unwrap();
 
-                                               write!(w, "#[no_mangle]\npub extern \"C\" fn {}_as_{}(this_arg: *const {}) -> crate::{} {{\n", ident, trait_obj.ident, ident, full_trait_path).unwrap();
+                                               write!(w, "#[no_mangle]\npub extern \"C\" fn {}_as_{}(this_arg: &{}) -> crate::{} {{\n", ident, trait_obj.ident, ident, full_trait_path).unwrap();
                                                writeln!(w, "\tcrate::{} {{", full_trait_path).unwrap();
                                                writeln!(w, "\t\tthis_arg: unsafe {{ (*this_arg).inner as *mut c_void }},").unwrap();
                                                writeln!(w, "\t\tfree: None,").unwrap();
@@ -951,10 +956,9 @@ fn writeln_impl<W: std::io::Write>(w: &mut W, i: &syn::ItemImpl, types: &mut Typ
                                                        },
                                                        "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, &*i.self_ty, types, &gen_types),
-                                                       _ => {},
+                                                       _ => maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types),
                                                }
-                                       } else if p.path.get_ident().is_some() {
+                                       } else {
                                                // If we have no generics, try a manual implementation:
                                                maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types);
                                        }
@@ -1551,10 +1555,18 @@ fn main() {
        let mut cpp_header_file = std::fs::OpenOptions::new().write(true).create(true).truncate(true)
                .open(&args[6]).expect("Unable to open new header file");
 
-       writeln!(header_file, "#if defined(__GNUC__)\n#define MUST_USE_STRUCT __attribute__((warn_unused))").unwrap();
-       writeln!(header_file, "#else\n#define MUST_USE_STRUCT\n#endif").unwrap();
-       writeln!(header_file, "#if defined(__GNUC__)\n#define MUST_USE_RES __attribute__((warn_unused_result))").unwrap();
-       writeln!(header_file, "#else\n#define MUST_USE_RES\n#endif").unwrap();
+       writeln!(header_file, "#if defined(__GNUC__)").unwrap();
+       writeln!(header_file, "#define MUST_USE_STRUCT __attribute__((warn_unused))").unwrap();
+       writeln!(header_file, "#define MUST_USE_RES __attribute__((warn_unused_result))").unwrap();
+       writeln!(header_file, "#else").unwrap();
+       writeln!(header_file, "#define MUST_USE_STRUCT").unwrap();
+       writeln!(header_file, "#define MUST_USE_RES").unwrap();
+       writeln!(header_file, "#endif").unwrap();
+       writeln!(header_file, "#if defined(__clang__)").unwrap();
+       writeln!(header_file, "#define NONNULL_PTR _Nonnull").unwrap();
+       writeln!(header_file, "#else").unwrap();
+       writeln!(header_file, "#define NONNULL_PTR").unwrap();
+       writeln!(header_file, "#endif").unwrap();
        writeln!(cpp_header_file, "#include <string.h>\nnamespace LDK {{").unwrap();
 
        // First parse the full crate's ASTs, caching them so that we can hold references to the AST