Implementation: Internal (“Passive”) Iterators

• Con: Hides complex position from client
• Con: Less flexible (like “for” loop)
• Con: No synchronized traversals (MergeSort)
• Con: Info accumulated during traversal must be stored globally or statically (or passed as Iterator parameter)
• See also: http://sw-eng.falls-church.va.us/AdaIC/docs/style-guide/83style/style-t.txt