system library

Provides fundamental system types for resource management, threading, and common exceptions.

This library contains core system abstractions inspired by the .NET System namespace, including disposal patterns, cancellation tokens, and base exception types.

Resource Management

Dispose of resources properly:

class MyResource implements Disposable {
  @override
  void dispose() {
    // Clean up resources
  }
}

// Synchronous disposal
using((resource) {
  // Use resource
}, MyResource());

// Asynchronous disposal
await using((resource) async {
  // Use resource
}, MyAsyncResource());

Cancellation Support

Cancel long-running operations:

final cts = CancellationTokenSource();

// Cancel after timeout
cts.cancelAfter(Duration(seconds: 30));

// Perform cancellable work
await doWorkAsync(cts.token);

// Cancel manually
cts.cancel();

Exception Types

Standard exception types for common error conditions:

throw ArgumentNullException('paramName');
throw ObjectDisposedException('MyClass');
throw OperationCancelledException();