ui/src/base/disposable.ts

// Copyright (C) 2026 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

export function isDisposable(value: unknown): value is Disposable {
  return (
    value !== null &&
    (typeof value === 'object' || typeof value === 'function') &&
    Symbol.dispose in value &&
    typeof value[Symbol.dispose] === 'function'
  );
}

export function isAsyncDisposable(value: unknown): value is AsyncDisposable {
  return (
    value !== null &&
    (typeof value === 'object' || typeof value === 'function') &&
    Symbol.asyncDispose in value &&
    typeof value[Symbol.asyncDispose] === 'function'
  );
}