/// <summary>
/// Initializes a new instance of the <see cref="ImmutableDictionary{TKey, TValue}.Enumerator"/> struct.
/// </summary>
/// <param name="root">The root.</param>
/// <param name="builder">The builder, if applicable.</param>
internal Enumerator(SortedInt32KeyNode<HashBucket> root, Builder? builder = null)
{
_builder = builder;
_mapEnumerator = new SortedInt32KeyNode<HashBucket>.Enumerator(root);
_bucketEnumerator = default(HashBucket.Enumerator);
_enumeratingBuilderVersion = builder != null ? builder.Version : -1;
}
/// <summary>
/// Initializes a new instance of the <see cref="ImmutableDictionary<TKey, TValue>.Enumerator"/> struct.
/// </summary>
/// <param name="root">The root.</param>
/// <param name="builder">The builder, if applicable.</param>
internal Enumerator(ImmutableSortedDictionary <int, HashBucket> .Node root, Builder builder = null)
{
this.builder = builder;
this.mapEnumerator = new ImmutableSortedDictionary <int, HashBucket> .Enumerator(root);
this.bucketEnumerator = default(HashBucket.Enumerator);
this.enumeratingBuilderVersion = builder != null ? builder.Version : -1;
}
/// <summary>
/// Sets the enumerator to its initial position, which is before the first element in the collection.
/// </summary>
/// <exception cref="T:System.InvalidOperationException">The collection was modified after the enumerator was created. </exception>
public void Reset()
{
this.enumeratingBuilderVersion = builder != null ? builder.Version : -1;
this.mapEnumerator.Reset();
// Reseting the bucket enumerator is pointless because we'll start on a new bucket later anyway.
this.bucketEnumerator.Dispose();
this.bucketEnumerator = default(HashBucket.Enumerator);
}
/// <summary>
/// Advances the enumerator to the next element of the collection.
/// </summary>
/// <returns>
/// true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.
/// </returns>
/// <exception cref="T:System.InvalidOperationException">The collection was modified after the enumerator was created. </exception>
public bool MoveNext()
{
this.ThrowIfChanged();
if (this.bucketEnumerator.MoveNext())
{
return(true);
}
if (this.mapEnumerator.MoveNext())
{
this.bucketEnumerator = new HashBucket.Enumerator(this.mapEnumerator.Current.Value);
return(this.bucketEnumerator.MoveNext());
}
return(false);
}
/// <summary>
/// Advances the enumerator to the next element of the collection.
/// </summary>
/// <returns>
/// true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.
/// </returns>
/// <exception cref="InvalidOperationException">The collection was modified after the enumerator was created. </exception>
public bool MoveNext()
{
this.ThrowIfChanged();
if (_bucketEnumerator.MoveNext())
{
return true;
}
if (_mapEnumerator.MoveNext())
{
_bucketEnumerator = new HashBucket.Enumerator(_mapEnumerator.Current.Value);
return _bucketEnumerator.MoveNext();
}
return false;
}