Sequence and Collection Protocols

A type that provides sequential, iterated access to its elements.

A sequence whose elements can be traversed multiple times, nondestructively, and accessed by an indexed subscript.

A collection that supports backward as well as forward traversal.

A collection that supports efficient random-access index traversal.

A collection that supports subscript assignment.

A collection that supports replacement of an arbitrary subrange of elements with the elements of another collection.

A type that supplies the values of a sequence one at a time.

A type that provides mathematical set operations.

A sequence on which normally-eager operations such as map and filter are implemented lazily.

A collection on which normally-eager operations such as map and filter are implemented lazily.

Use wrappers, indices, and iterators in operations like slicing, flattening, and reversing a collection.

Build your own buffer-backed collection types.