pkgs/ffigen/test/native_objc_test/error_method_test.m

// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

#import <Foundation/NSObject.h>
#import <Foundation/NSError.h>

@interface ErrorMethodTestObject : NSObject {}

- (BOOL) errorMethodReturningBool:(BOOL) isOk
                            error:(NSError**) error;
- (nullable NSObject*) errorMethodReturningNullable:(BOOL) isOk
                                              error:(NSError**) error;


- (BOOL) outErrorMethod:(BOOL) isOk outError:(NSError**) outError;

// Using this nonnull BEGIN/END macro because the usual nullability
// annotations are giving syntax errors when combined with pointer pointers.
// Also, the name of this macro is misleading. It seems to actually change the
// behavior to assuming nullable.
NS_ASSUME_NONNULL_BEGIN
- (BOOL) nullableErrorMethod:(BOOL) isOk error:(NSError**) error;
NS_ASSUME_NONNULL_END

@end

@implementation ErrorMethodTestObject

- (BOOL) errorMethodReturningBool:(BOOL) isOk
                            error:(NSError**) error {
  if (!isOk) {
    *error = [NSError errorWithDomain:@"Oh no, an error!"
                      code:123 userInfo:nil];
  }
  return isOk;
}

- (nullable NSObject*) errorMethodReturningNullable:(BOOL) isOk
                                              error:(NSError**) error {
  if (isOk) {
    return [NSObject new];
  } else {
    *error = [NSError errorWithDomain:@"Oh no, another error!"
                      code:123 userInfo:nil];
    return nil;
  }
}

- (BOOL) outErrorMethod:(BOOL) isOk outError:(NSError**) outError {
  if (!isOk) {
    *outError = [NSError errorWithDomain:@"Oh no, an error!"
                         code:123 userInfo:nil];
  }
  return isOk;
}

NS_ASSUME_NONNULL_BEGIN
- (BOOL) nullableErrorMethod:(BOOL) isOk error:(NSError**) error {
  if (!isOk) {
    *error = [NSError errorWithDomain:@"Oh no, an error!"
                      code:123 userInfo:nil];
  }
  return isOk;
}
NS_ASSUME_NONNULL_END

@end