void pxno_operation (
Pint length /*unused */
)
Depending on the edit mode, a No-op generalized structure element is inserted into the open structure after the current element or replaces the current element. The newly inserted element becomes the current element.
At structure traversal time, the No-op element is skipped.
No-op elements are placeholders in the structure. By saving room for structure elements that will need to be inserted later, you can reduce fragmentation in the structure database. When it's time to replace the No-op with a different element use Set Edit Mode (routine pset_edit_mode) to set the structure edit mode to Replace. Then, position the element pointer to point to the No-op, and replace it with the appropriate element.