# lwt-dllist - Mutable doubly-linked list An `Lwt_dllist` is an object holding a list of elements which support the following operations: - adding an element to the left or the right in time and space O(1) - taking an element from the left or the right in time and space O(1) - removing a previously added element from a sequence in time and space O(1) - removing an element while the sequence is being traversed. ## History This module was formerly part of the Lwt core distribution as the `Lwt_sequence` module, but has been pulled out into a separate library since it is really just an implementation detail of Lwt. You can migrate existing uses of `Lwt_sequence` into `Lwt_dllist` by simply renaming the module. The implementation of the module remains unchanged, but the name reflects the fact that the implementation is a doubly-linked list. ## Further Reading - Docs: - Issues: - Discussion: with the MirageOS tag.