Jonathan Tan <jonathantanmy@xxxxxxxxxx> writes: > Use singly-linked lists (instead of doubly-linked lists) in trailer to > keep track of arguments (whether implicit from configuration or explicit > from the command line) and trailer items. > > This change significantly reduces the code length and simplifies the code. > There are now fewer pointers to be manipulated, but most trailer > manipulations now require seeking from beginning to end, so there might > be a slight net decrease in performance; however the number of trailers > is usually small (10 to 15 at the most) so this should not cause a big > impact. It is overall a very good change, but can you split this into two independent patches? s/struct trailer_item/const &/ sprinkled all over the place is more or less unrelated change and it is very distracting to see the primary change of the way lists are handled.