pkg/analyzer/lib/src/dart/ast/extensions.dart

// Copyright (c) 2020, 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 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/element/element.dart';
import 'package:analyzer/src/dart/ast/ast.dart';

extension ElementExtension on Element {
  /// Return `true` if this element, the enclosing class (if there is one), or
  /// the enclosing library, has been annotated with the `@doNotStore`
  /// annotation.
  bool get hasOrInheritsDoNotStore {
    if (hasDoNotStore) {
      return true;
    }
    var ancestor = enclosingElement;
    if (ancestor is ClassElement || ancestor is ExtensionElement) {
      if (ancestor.hasDoNotStore) {
        return true;
      }
      ancestor = ancestor.enclosingElement;
    }
    return ancestor is CompilationUnitElement &&
        ancestor.enclosingElement.hasDoNotStore;
  }
}

extension ListOfFormalParameterExtension on List<FormalParameter> {
  Iterable<FormalParameterImpl> get asImpl {
    return cast<FormalParameterImpl>();
  }
}