[ffigen][swift2objc] Some small fixes (#1777)

pkgs/ffigen/lib/ffigen.dart

@@ -8,5 +8,12 @@
 /// https://pub.dev/packages/ffigen for details.
 library ffigen;
 
-export 'src/config_provider.dart' show Config, YamlConfig;
+export 'src/config_provider.dart'
+    show
+        Config,
+        DeclarationFilters,
+        ExternalVersions,
+        Language,
+        Versions,
+        YamlConfig;
 export 'src/ffigen.dart' show FfiGen;

pkgs/ffigen/lib/src/code_generator/pointer.dart

@@ -154,6 +154,15 @@ class ObjCObjectPointer extends PointerType {
 
   @override
   String? generateRetain(String value) => 'objc_retain($value)';
+
+  @override
+  bool isSupertypeOf(Type other) {
+    other = other.typealiasType;
+    // id/Object* is a supertype of all ObjC objects and blocks.
+    return other is ObjCObjectPointer ||
+        other is ObjCInterface ||
+        other is ObjCBlock;
+  }
 }
 
 /// A pointer to an Objective C block.
@@ -168,4 +177,10 @@ class ObjCBlockPointer extends ObjCObjectPointer {
 
   @override
   String? generateRetain(String value) => 'objc_retainBlock($value)';
+
+  @override
+  bool isSupertypeOf(Type other) {
+    other = other.typealiasType;
+    return other is ObjCBlockPointer || other is ObjCBlock;
+  }
 }

pkgs/ffigen/lib/src/config_provider.dart

@@ -6,4 +6,5 @@
 library config_provider;
 
 export 'config_provider/config.dart';
+export 'config_provider/config_types.dart';
 export 'config_provider/yaml_config.dart';

pkgs/ffigen/lib/src/header_parser/parser.dart

@@ -12,7 +12,6 @@ import 'package:logging/logging.dart';
 import '../code_generator.dart';
 import '../code_generator/utils.dart';
 import '../config_provider.dart';
-import '../config_provider/config_types.dart';
 import '../strings.dart' as strings;
 import '../visitor/apply_config_filters.dart';
 import '../visitor/ast.dart';

pkgs/ffigen/lib/src/header_parser/sub_parsers/objcinterfacedecl_parser.dart

@@ -174,7 +174,7 @@ void _parseSuperType(clang_types.CXCursor cursor, ObjCInterface itf) {
       kind: ObjCMethodKind.propertySetter,
       isClassMethod: isClassMethod,
       isOptional: isOptionalMethod,
-      returnType: NativeType(SupportedNativeType.voidType),
+      returnType: voidType,
       family: null,
     );
     setter.params

pkgs/ffigen/lib/src/visitor/fix_overridden_methods.dart

@@ -130,7 +130,9 @@ class FixOverriddenMethodsVisitation extends Visitation {
       final (root, rootMethod) = _findRootWithMethod(node, method);
       // If method and rootMethod are the same kind, then there's nothing to do.
       if ((method.kind == ObjCMethodKind.propertyGetter) ==
-          (rootMethod.kind == ObjCMethodKind.propertyGetter)) continue;
+          (rootMethod.kind == ObjCMethodKind.propertyGetter)) {
+        continue;
+      }
       _convertAllSubtreeMethodsToProperties(root, rootMethod);
     }
   }

pkgs/ffigen/test/large_integration_tests/large_objc_test.dart

@@ -14,7 +14,6 @@ import 'dart:io';
 
 import 'package:ffigen/ffigen.dart';
 import 'package:ffigen/src/code_generator/utils.dart';
-import 'package:ffigen/src/config_provider/config.dart';
 import 'package:ffigen/src/config_provider/config_types.dart';
 import 'package:logging/logging.dart';
 import 'package:pub_semver/pub_semver.dart';

pkgs/ffigen/test/unit_tests/subtyping_test.dart

@@ -32,6 +32,14 @@ void main() {
     final uncle = makeInterface('Uncle', grandparent);
     final child = makeInterface('Child', parent);
 
+    ObjCBlock makeBlock(Type returnType, List<Type> argTypes) => ObjCBlock(
+        returnType: returnType,
+        params: [
+          for (final t in argTypes) Parameter(type: t, objCConsumed: false),
+        ],
+        returnsRetained: false,
+        builtInFunctions: builtInFunctions);
+
     group('ObjCInterface', () {
       test('subtype', () {
         expect(parent.isSubtypeOf(parent), isTrue);
@@ -140,14 +148,6 @@ void main() {
     });
 
     group('ObjCBlock', () {
-      ObjCBlock makeBlock(Type returnType, List<Type> argTypes) => ObjCBlock(
-          returnType: returnType,
-          params: [
-            for (final t in argTypes) Parameter(type: t, objCConsumed: false),
-          ],
-          returnsRetained: false,
-          builtInFunctions: builtInFunctions);
-
       test('covariant returns', () {
         // Return types are covariant. S Function() <: T Function() if S <: T.
         final returnsParent = makeBlock(parent, []);
@@ -237,5 +237,25 @@ void main() {
       expect(makeTypealias(parent).isSubtypeOf(child), isFalse);
       expect(parent.isSubtypeOf(makeTypealias(child)), isFalse);
     });
+
+    test('ObjCObjectPointer', () {
+      expect(ObjCObjectPointer().isSubtypeOf(ObjCObjectPointer()), isTrue);
+      expect(parent.isSubtypeOf(ObjCObjectPointer()), isTrue);
+      expect(ObjCObjectPointer().isSubtypeOf(parent), isFalse);
+
+      final block = makeBlock(voidType, []);
+      expect(block.isSubtypeOf(ObjCObjectPointer()), isTrue);
+      expect(ObjCObjectPointer().isSubtypeOf(block), isFalse);
+    });
+
+    test('ObjCBlockPointer', () {
+      expect(ObjCBlockPointer().isSubtypeOf(ObjCBlockPointer()), isTrue);
+      expect(parent.isSubtypeOf(ObjCBlockPointer()), isFalse);
+      expect(ObjCBlockPointer().isSubtypeOf(parent), isFalse);
+
+      final block = makeBlock(voidType, []);
+      expect(block.isSubtypeOf(ObjCBlockPointer()), isTrue);
+      expect(ObjCBlockPointer().isSubtypeOf(block), isFalse);
+    });
   });
 }

pkgs/objective_c/lib/src/objective_c_bindings_generated.dart

@@ -2362,7 +2362,7 @@ class NSItemProvider extends NSObject {
 
   /// setSuggestedName:
   set suggestedName(NSString? value) {
-    return _objc_msgSend_1jdvcbf(this.ref.pointer, _sel_setSuggestedName_,
+    _objc_msgSend_1jdvcbf(this.ref.pointer, _sel_setSuggestedName_,
         value?.ref.pointer ?? ffi.nullptr);
   }
 
@@ -3074,7 +3074,7 @@ class NSMutableData extends NSData {
 
   /// setLength:
   set length(int value) {
-    return _objc_msgSend_1i9r4xy(this.ref.pointer, _sel_setLength_, value);
+    _objc_msgSend_1i9r4xy(this.ref.pointer, _sel_setLength_, value);
   }
 }
 
@@ -6228,7 +6228,7 @@ class NSStream extends NSObject {
 
   /// setDelegate:
   set delegate(objc.ObjCObjectBase? value) {
-    return _objc_msgSend_1jdvcbf(
+    _objc_msgSend_1jdvcbf(
         this.ref.pointer, _sel_setDelegate_, value?.ref.pointer ?? ffi.nullptr);
   }
 

pkgs/swift2objc/lib/src/ast/declarations/built_in/built_in_declaration.dart

@@ -10,6 +10,7 @@ enum BuiltInDeclaration implements Declaration, ObjCAnnotatable {
   swiftNSObject(id: 'c:objc(cs)NSObject', name: 'NSObject'),
   swiftString(id: 's:SS', name: 'String'),
   swiftInt(id: 's:Si', name: 'Int'),
+  swiftFloat(id: 's:Sf', name: 'Float'),
   swiftDouble(id: 's:Sd', name: 'Double'),
   swiftBool(id: 's:Sb', name: 'Bool'),
   swiftVoid(id: 's:s4Voida', name: 'Void');
@@ -32,6 +33,7 @@ enum BuiltInDeclaration implements Declaration, ObjCAnnotatable {
 final objectType = BuiltInDeclaration.swiftNSObject.asDeclaredType;
 final stringType = BuiltInDeclaration.swiftString.asDeclaredType;
 final intType = BuiltInDeclaration.swiftInt.asDeclaredType;
+final floatType = BuiltInDeclaration.swiftFloat.asDeclaredType;
 final doubleType = BuiltInDeclaration.swiftDouble.asDeclaredType;
 final boolType = BuiltInDeclaration.swiftBool.asDeclaredType;
 final voidType = BuiltInDeclaration.swiftVoid.asDeclaredType;

pkgs/swift2objc/lib/src/config.dart

@@ -22,14 +22,14 @@ class Config {
   /// Specify where the wrapper swift file will be output.
   final Uri outputFile;
 
-  /// Specify where the wrapper swift file will be output.
+  /// Text inserted into the [outputFile] before the generated output.
   final String? preamble;
 
   /// Specify where to output the intermidiate files (i.g the symbolgraph json).
   /// If this is null, a teemp directory will be generated in the system temp
   /// directory (using `Directory.systemTemp`) and then deleted.
   /// Specifying a temp directory would prevent the tool from deleting the
-  /// intermediate files after generating the wrapper
+  /// intermediate files after generating the wrapper.
   final Uri? tempDir;
 
   const Config({
@@ -46,12 +46,12 @@ sealed class InputConfig {
   Command? get symbolgraphCommand;
 }
 
-/// Used to generate a objc wrapper for one or more swift files
+/// Used to generate a objc wrapper for one or more swift files.
 class FilesInputConfig implements InputConfig {
-  /// The swift file(s) to generate a wrapper for
+  /// The swift file(s) to generate a wrapper for.
   final List<Uri> files;
 
-  /// The name of the module files generated by `swiftc in `tempDir`
+  /// The name of the module files generated by `swiftc in `tempDir`.
   final String generatedModuleName;
 
   FilesInputConfig({
@@ -74,17 +74,17 @@ class FilesInputConfig implements InputConfig {
       );
 }
 
-/// Used to generate a objc wrapper for a built-in swift module
+/// Used to generate a objc wrapper for a built-in swift module.
 /// (e.g, AVFoundation)
 class ModuleInputConfig implements InputConfig {
-  /// The swift module to generate a wrapper for
+  /// The swift module to generate a wrapper for.
   final String module;
 
-  /// The target to generate code for
+  /// The target to generate code for.
   /// (e.g `x86_64-apple-ios17.0-simulator`)
   final String target;
 
-  /// The sdk to compile against
+  /// The sdk to compile against.
   /// (e.g `/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sd`)
   final Uri sdk;