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Loyc.Collections.ReadOnlyListAsListSource< T > Class Template Reference

Helper type returned from LCExt.AsListSource{T}(IReadOnlyList{T}). More...


Source file:
Inheritance diagram for Loyc.Collections.ReadOnlyListAsListSource< T >:
Loyc.WrapperBase< T > Loyc.Collections.IListSource< out T > Loyc.Collections.ISource< out T > Loyc.Collections.ITryGet< in K, out V > Loyc.Collections.IIndexed< in K, out V > Loyc.Collections.ICount Loyc.Collections.IIsEmpty

Remarks

Helper type returned from LCExt.AsListSource{T}(IReadOnlyList{T}).

A read-only wrapper that implements IListSource.

Public fields

int Count => _obj.Count
 
bool IsEmpty => Count == 0
 
this[int index] => _obj[index]
 
this[int index, T defaultValue] => (uint)index >= (uint)_obj.Count ? defaultValue : _obj[index]
 

Public Member Functions

 ReadOnlyListAsListSource (IReadOnlyList< T > obj)
 
bool Contains (T item)
 
int IndexOf (T item)
 
void CopyTo (T[] array, int arrayIndex)
 
IEnumerator< T > GetEnumerator ()
 
TryGet (int index, out bool fail)
 
Slice_< T > Slice (int start, int count)
 Returns a sub-range of this list. More...
 
- Public Member Functions inherited from Loyc.WrapperBase< T >
override bool Equals (object?obj)
 Returns true iff the parameter 'obj' is a wrapper around an object that is equal to the object that this object wraps. More...
 
override int GetHashCode ()
 Returns the hashcode of the wrapped object. More...
 
override string ToString ()
 Returns ToString() of the wrapped object. More...
 
- Public Member Functions inherited from Loyc.Collections.ITryGet< in K, out V >
TryGet (K key, out bool fail)
 Gets the item for the specified key or index, and does not throw an exception on failure. More...
 

Additional Inherited Members

- Properties inherited from Loyc.Collections.ISource< out T >
new int Count [get]
 Gets the number of items in the collection. More...
 
- Properties inherited from Loyc.Collections.ICount
int Count [get]
 Gets the number of items in the collection. More...
 
- Properties inherited from Loyc.Collections.IIsEmpty
bool IsEmpty [get]
 
- Properties inherited from Loyc.Collections.IIndexed< in K, out V >
this[K key] [get]
 Gets the value associated with the specified key. More...
 
- Protected Member Functions inherited from Loyc.WrapperBase< T >
 WrapperBase (T wrappedObject)
 
- Protected fields inherited from Loyc.WrapperBase< T >
_obj
 
- Protected static fields inherited from Loyc.WrapperBase< T >
static readonly
EqualityComparer< T > 
TComp = EqualityComparer<T>.Default
 

Member Function Documentation

Slice_<T> Loyc.Collections.ReadOnlyListAsListSource< T >.Slice ( int  start,
int  count 
)

Returns a sub-range of this list.

Parameters
startThe new range will start at this index in the current list (this location will be index [0] in the new range).
countThe desired number of elements in the new range, or int.MaxValue to get all elements until the end of the list.
Returns
Returns a sub-range of this range.
Exceptions
ArgumentExceptionThe start index was below zero.

The (start, count) range is allowed to be invalid, as long as start is zero or above.

  • If count is below zero, or if start is above the original Count, the Count of the new slice is set to zero.
  • if (start + count) is above the original Count, the Count of the new slice is reduced to this.Count - start. Implementation note: do not compute (start + count) because it may overflow. Instead, test whether (count > this.Count - start).

Most collections should use the following implementation:

IListSource<T> IListSource<T>.Slice(int start, int count) { return Slice(start, count); }
public Slice_<T> Slice(int start, int count) { return new Slice_<T>(this, start, count); }

Implements Loyc.Collections.IListSource< out T >.