LCOV - code coverage report
Current view: top level - collection-1.14.3/lib/src - empty_unmodifiable_set.dart (source / functions) Hit Total Coverage
Test: coverage.lcov Lines: 0 16 0.0 %
Date: 2017-10-10 20:17:03 Functions: 0 0 -

          Line data    Source code
       1             : // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
       2             : // for details. All rights reserved. Use of this source code is governed by a
       3             : // BSD-style license that can be found in the LICENSE file.
       4             : 
       5             : import 'dart:collection';
       6             : 
       7             : import 'unmodifiable_wrappers.dart';
       8             : 
       9             : // Unfortunately, we can't use UnmodifiableSetMixin here, since const classes
      10             : // can't use mixins.
      11             : /// An unmodifiable, empty set that can have a const constructor.
      12             : class EmptyUnmodifiableSet<E> extends IterableBase<E>
      13             :     implements UnmodifiableSetView<E> {
      14             :   static T _throw<T>() {
      15           0 :     throw new UnsupportedError("Cannot modify an unmodifiable Set");
      16             :   }
      17             : 
      18           0 :   Iterator<E> get iterator => new Iterable<E>.empty().iterator;
      19             :   int get length => 0;
      20             : 
      21           0 :   const EmptyUnmodifiableSet();
      22             : 
      23             :   bool contains(Object element) => false;
      24           0 :   bool containsAll(Iterable<Object> other) => other.isEmpty;
      25             :   E lookup(Object element) => null;
      26           0 :   Set<E> toSet() => new Set();
      27           0 :   Set<E> union(Set<E> other) => new Set.from(other);
      28           0 :   Set<E> intersection(Set<Object> other) => new Set();
      29           0 :   Set<E> difference(Set<Object> other) => new Set();
      30             : 
      31           0 :   bool add(E value) => _throw();
      32           0 :   void addAll(Iterable<E> elements) => _throw();
      33           0 :   void clear() => _throw();
      34           0 :   bool remove(Object element) => _throw();
      35           0 :   void removeAll(Iterable<Object> elements) => _throw();
      36           0 :   void removeWhere(bool test(E element)) => _throw();
      37           0 :   void retainWhere(bool test(E element)) => _throw();
      38           0 :   void retainAll(Iterable<Object> elements) => _throw();
      39             : }

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