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add SinglyLinkedList.append procs

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pacien
2018-11-26 12:58:43 +01:00
parent eb919c35b2
commit 4e483bb01a
2 changed files with 17 additions and 1 deletions
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15
lib/pure/collections/lists.nim
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@@ -140,11 +140,26 @@ proc contains*[T](L: SomeLinkedCollection[T], value: T): bool {.inline.} =
## exist, true otherwise.
result = find(L, value) != nil
proc append*[T](L: var SinglyLinkedList[T],
n: SinglyLinkedNode[T]) {.inline.} =
## appends a node `n` to `L`. Efficiency: O(1).
n.next = nil
if L.tail != nil:
assert(L.tail.next == nil)
L.tail.next = n
L.tail = n
if L.head == nil: L.head = n
proc append*[T](L: var SinglyLinkedList[T], value: T) {.inline.} =
## appends a value to `L`. Efficiency: O(1).
append(L, newSinglyLinkedNode(value))
proc prepend*[T](L: var SinglyLinkedList[T],
n: SinglyLinkedNode[T]) {.inline.} =
## prepends a node to `L`. Efficiency: O(1).
n.next = L.head
L.head = n
if L.tail == nil: L.tail = n
proc prepend*[T](L: var SinglyLinkedList[T], value: T) {.inline.} =
## prepends a node to `L`. Efficiency: O(1).