4 files changed, 17 insertions, 0 deletions
diff --git a/src/stack.nim b/src/stack.nim
index eeef5cd..9ba3e24 100644
--- a/src/stack.nim
+++ b/src/stack.nim
@@ -73,6 +73,7 @@ func Transfert*(toss: var Stack, soss: var Stack, n: int) =
     soss.height = 0
 
 func Discard*(s: var Stack, n: int) =
+  ## Implements a discard mechanism intended for use with the '}'(aka end) stackstack command
   s.height -= n
   if s.height < 0:
     s.height = 0
diff --git a/src/stackStack.nim b/src/stackStack.nim
index 6d32c87..1bc89c0 100644
--- a/src/stackStack.nim
+++ b/src/stackStack.nim
@@ -25,6 +25,12 @@ func PushVector*(ss: var StackStack, v: tuple[x, y: int]) =
 func Clear*(ss: var StackStack) =
   ss.head[].Clear()
 
+func Duplicate*(ss: var StackStack) =
+  ss.head[].Duplicate()
+
+func Swap*(ss: var StackStack) =
+  ss.head[].Swap()
+
 func Begin*(ss: var StackStack, v: tuple[x, y: int]) =
   inc ss.height
   let soss = ss.head
diff --git a/tests/stack.nim b/tests/stack.nim
index cb49daf..cecdef9 100644
--- a/tests/stack.nim
+++ b/tests/stack.nim
@@ -110,6 +110,8 @@ suite "Stack":
     check empty.data[1] == 0
     check empty.data[2] == 0
     check empty.data[3] == 0
+    empty[].Transfert(empty2[], 32)
+    check empty.size == 64
     empty = NewStack()
     var some = NewStack()
     some[].Push(2)
diff --git a/tests/stackStack.nim b/tests/stackStack.nim
index 03650f8..9f3c176 100644
--- a/tests/stackStack.nim
+++ b/tests/stackStack.nim
@@ -22,6 +22,14 @@ suite "StackStack":
     empty[].Push(3)
     empty[].Clear()
     check empty[].Pop() == 0
+  test "Duplicate":
+    var empty = NewStackStack()
+    empty[].Clear()
+    check empty[].Pop() == 0
+  test "Swap":
+    var empty = NewStackStack()
+    empty[].Swap()
+    check empty[].Pop() == 0
   test "Begin":
     var empty = NewStackStack()
     empty[].Begin((1, 2))