/// <summary>
/// Joins an <see cref="IEnumerable{T}"/> into an existing <see cref="CombinedSortedEnumerable{T}"/>.
/// </summary>
/// <param name="a">The <see cref="IEnumerable{T}"/>.</param>
/// <param name="b">The <see cref="CombinedSortedEnumerable{T}"/>.</param>
/// <returns>A new <see cref="CombinedSortedEnumerable{T}"/> containing the full collection of enumerables.</returns>
public static CombinedSortedEnumerable <T> operator +(IEnumerable <T> a, CombinedSortedEnumerable <T> b)
{
CombinedSortedEnumerable <T> cse = new CombinedSortedEnumerable <T>(b.comparison);
cse.loaders = new List <IEnumerable <T> >();
cse.loaders.Add(a);
cse.loaders.AddRange(b.loaders);
return(cse);
}
internal Enumerator(CombinedSortedEnumerable <T> loader)
{
this.comparison = loader.comparison;
this.current = default(T);
this.firstDone = false;
this.loaders = new List <IEnumerator <T> >();
for (int i = 0; i < loader.loaders.Count; i++)
{
this.loaders.Add(loader.loaders[i].GetEnumerator());
}
}
/// <summary>
/// Adds an additional enumerable to a <see cref="CombinedSortedEnumerable{T}"/>.
/// </summary>
/// <param name="combinedLoader">The <see cref="CombinedSortedEnumerable{T}"/> to which the enumerable is added.</param>
/// <param name="loader">The <see cref="IEnumerable{T}"/> that is added.</param>
/// <returns>A new <see cref="CombinedSortedEnumerable{T}"/> containing the full collection of enumerables.</returns>
public static CombinedSortedEnumerable <T> Add(CombinedSortedEnumerable <T> combinedLoader, IEnumerable <T> loader)
{
if (loader is CombinedSortedEnumerable <T> )
{
return(combinedLoader + (loader as CombinedSortedEnumerable <T>));
}
CombinedSortedEnumerable <T> cse = new CombinedSortedEnumerable <T>(combinedLoader.comparison, loader);
for (int i = 0; i < combinedLoader.loaders.Count; i++)
{
cse.loaders.Insert(i, combinedLoader.loaders[i]);
}
return(cse);
}
