* BUG: Fix possible bugs when updating an invalid Current.
* BUG: Really erase old elements instead of just marking them as Null to
prevent (potential) information leaks.
* OPT: Current and the enumerators (internally) carry list global indices
(LGI) which can be used as anchor points together with List.Count to speed
up traversals (always taking the shortest way through the list).
* OPT: Remove workaround code related to an enumerator bug fixed in #5749.
* NEW: Expose List.Current as a virtual object representing the current list
element which has Append() and Prepend() methods to manipulate the list
not only around its head. This breaks backwards compatibility.
* NEW: List.Value is what List.Current has meant formerly.
* NEW: Add List.Current.Index and List.Index which are an absolute index of
the current element into the list. These are guaranteed to be in bounds of
[-List.Count; List.Count - 1]. Note that each non-negative index has an
associated negative equivalent and vice versa. They work like the indices
given to List._get().
* NEW: Add a List.AutoNormalize property which instructs the list to
automatically make indices (like resulting from a calculation) fit into
the List bounds preserving the sign of the given index. This effectively
prevents any "Out of bounds" errors.
* NEW: Add List.MoveTo() to point Current to an index.
* NEW: List.Current.Is{First,Last,Valid} can be used to determine if Current
is the first or last element of the list or if it is valid, respectively.
git-svn-id: svn://localhost/gambas/trunk@5778 867c0c6c-44f3-4631-809d-bfa615b0a4ec
* OPT: Great overhaul of List algorithms. Beware: Still buggy.
* OPT: Make list chunks carry multiple Variants to improve cache locality.
* OPT: Don't traverse List forwards/backwards when the absolute value of
index is past the half of Count.
* NEW: Introduce List.Backwards - a virtual object to enumerate backwards
* NEW: Don't use List.Current as enumeration pointer.
* NEW: Begin enumeration at the first/last node.
* NEW: Traverse backwards when given negative index to _get.
* NEW: Make Current invalid by default.
* NEW: Assign first/last element when MoveNext()/MovePrev() is issued on an
invalid Current.
* NEW: Use List.Current as pointer for the Find*() methods, too.
* NEW: Assign first/last element when FindNext()/FindPrev() is issued on an
invalid Current.
* NEW: Don't return an index from Find*() methods because it is not the way
linked list are dealt with.
* NEW: Make insertion and removal of elements safe in enumerations.
* NEW: When Current (or enumerator) is removed, the pointer remains relative
to the beginning of the List but it never wraps around the end.
* BUG: Correctly *cycle* with {Move,Find}{Next,Prev}()
git-svn-id: svn://localhost/gambas/trunk@5302 867c0c6c-44f3-4631-809d-bfa615b0a4ec
* NEW: Rename gb.adt to gb.data
* NEW: Mark gb.data as "Unfinished"
[GB.DATA]
* OPT: Block all changes from my working copy until they are mature. The
interface is considered to be stable (although some details in behaviour
will change); this justifies the "unfinished" state.
git-svn-id: svn://localhost/gambas/trunk@5147 867c0c6c-44f3-4631-809d-bfa615b0a4ec
