let mut needs_free = false;
let mut constr = Vec::new();
+ let mut is_clonable = true;
- writeln!(w, "#[must_use]\n#[derive(Clone)]\n#[repr(C)]\npub enum {} {{", e.ident).unwrap();
+ for var in e.variants.iter() {
+ if let syn::Fields::Named(fields) = &var.fields {
+ needs_free = true;
+ for field in fields.named.iter() {
+ if export_status(&field.attrs) == ExportStatus::TestOnly { continue; }
+
+ let mut ty_checks = Vec::new();
+ types.write_c_type(&mut ty_checks, &field.ty, Some(&gen_types), false);
+ if !types.is_clonable(&String::from_utf8(ty_checks).unwrap()) {
+ is_clonable = false;
+ }
+ }
+ } else if let syn::Fields::Unnamed(fields) = &var.fields {
+ for field in fields.unnamed.iter() {
+ let mut ty_checks = Vec::new();
+ types.write_c_type(&mut ty_checks, &field.ty, Some(&gen_types), false);
+ let ty = String::from_utf8(ty_checks).unwrap();
+ if ty != "" && !types.is_clonable(&ty) {
+ is_clonable = false;
+ }
+ }
+ }
+ }
+
+ if is_clonable {
+ writeln!(w, "#[derive(Clone)]").unwrap();
+ types.crate_types.set_clonable(format!("{}::{}", types.module_path, e.ident));
+ }
+ writeln!(w, "#[must_use]\n#[repr(C)]\npub enum {} {{", e.ident).unwrap();
for var in e.variants.iter() {
assert_eq!(export_status(&var.attrs), ExportStatus::Export); // We can't partially-export a mirrored enum
writeln_docs(w, &var.attrs, "\t");
}
}
- write_conv!(format!("to_native(&self) -> native{}", e.ident), false, true);
+ if is_clonable {
+ write_conv!(format!("to_native(&self) -> native{}", e.ident), false, true);
+ }
write_conv!(format!("into_native(self) -> native{}", e.ident), false, false);
- write_conv!(format!("from_native(native: &native{}) -> Self", e.ident), true, true);
+ if is_clonable {
+ write_conv!(format!("from_native(native: &native{}) -> Self", e.ident), true, true);
+ }
write_conv!(format!("native_into(native: native{}) -> Self", e.ident), true, false);
writeln!(w, "}}").unwrap();
writeln!(w, "/// Frees any resources used by the {}", e.ident).unwrap();
writeln!(w, "#[no_mangle]\npub extern \"C\" fn {}_free(this_ptr: {}) {{ }}", e.ident, e.ident).unwrap();
}
- writeln!(w, "/// Creates a copy of the {}", e.ident).unwrap();
- writeln!(w, "#[no_mangle]").unwrap();
- writeln!(w, "pub extern \"C\" fn {}_clone(orig: &{}) -> {} {{", e.ident, e.ident, e.ident).unwrap();
- writeln!(w, "\torig.clone()").unwrap();
- writeln!(w, "}}").unwrap();
+ if is_clonable {
+ writeln!(w, "/// Creates a copy of the {}", e.ident).unwrap();
+ writeln!(w, "#[no_mangle]").unwrap();
+ writeln!(w, "pub extern \"C\" fn {}_clone(orig: &{}) -> {} {{", e.ident, e.ident, e.ident).unwrap();
+ writeln!(w, "\torig.clone()").unwrap();
+ writeln!(w, "}}").unwrap();
+ }
w.write_all(&constr).unwrap();
write_cpp_wrapper(cpp_headers, &format!("{}", e.ident), needs_free, None);
}
}
}
+
+/// Walk the FullLibraryAST, determining if impl aliases need to be marked cloneable.
+fn walk_ast_second_pass<'a>(ast_storage: &'a FullLibraryAST, crate_types: &CrateTypes<'a>) {
+ for (module, astmod) in ast_storage.modules.iter() {
+ let orig_crate = module.splitn(2, "::").next().unwrap();
+ let ASTModule { ref attrs, ref items, .. } = astmod;
+ assert_eq!(export_status(&attrs), ExportStatus::Export);
+
+ let import_resolver = ImportResolver::new(orig_crate, &ast_storage.dependencies, module, items);
+ let mut types = TypeResolver::new(module, import_resolver, crate_types);
+
+ for item in items.iter() {
+ match item {
+ syn::Item::Impl(i) => {
+ match export_status(&i.attrs) {
+ ExportStatus::Export => {},
+ ExportStatus::NoExport|ExportStatus::TestOnly => continue,
+ ExportStatus::NotImplementable => panic!("(C-not implementable) must only appear on traits"),
+ }
+ if let Some(trait_path) = i.trait_.as_ref() {
+ if path_matches_nongeneric(&trait_path.1, &["core", "clone", "Clone"]) ||
+ path_matches_nongeneric(&trait_path.1, &["Clone"])
+ {
+ if let &syn::Type::Path(ref p) = &*i.self_ty {
+ if let Some(resolved_path) = types.maybe_resolve_path(&p.path, None) {
+ create_alias_for_impl(resolved_path, i, &mut types, |aliased_impl, types| {
+ if let &syn::Type::Path(ref p) = &*aliased_impl.self_ty {
+ if let Some(resolved_aliased_path) = types.maybe_resolve_path(&p.path, None) {
+ crate_types.set_clonable("crate::".to_owned() + &resolved_aliased_path);
+ }
+ }
+ });
+ }
+ }
+ }
+ }
+ }
+ _ => {}
+ }
+ }
+ }
+}
+
fn walk_private_mod<'a>(ast_storage: &'a FullLibraryAST, orig_crate: &str, module: String, items: &'a syn::ItemMod, crate_types: &mut CrateTypes<'a>) {
let import_resolver = ImportResolver::new(orig_crate, &ast_storage.dependencies, &module, &items.content.as_ref().unwrap().1);
for item in items.content.as_ref().unwrap().1.iter() {
}
/// Walk the FullLibraryAST, deciding how things will be mapped and adding tracking to CrateTypes.
-fn walk_ast<'a>(ast_storage: &'a FullLibraryAST, crate_types: &mut CrateTypes<'a>) {
+fn walk_ast_first_pass<'a>(ast_storage: &'a FullLibraryAST, crate_types: &mut CrateTypes<'a>) {
for (module, astmod) in ast_storage.modules.iter() {
let ASTModule { ref attrs, ref items, submods: _ } = astmod;
assert_eq!(export_status(&attrs), ExportStatus::Export);
// ...then walk the ASTs tracking what types we will map, and how, so that we can resolve them
// when parsing other file ASTs...
let mut libtypes = CrateTypes::new(&mut derived_templates, &libast);
- walk_ast(&libast, &mut libtypes);
+ walk_ast_first_pass(&libast, &mut libtypes);
+
+ // ... using the generated data, determine a few additional fields, specifically which type
+ // aliases are to be clone-able...
+ walk_ast_second_pass(&libast, &libtypes);
// ... finally, do the actual file conversion/mapping, writing out types as we go.
convert_file(&libast, &libtypes, &args[1], &mut header_file, &mut cpp_header_file);
projects / ldk-c-bindings / blobdiff