CS 342 Lecture -*- Outline -*-

* Block entry and exit (Algol 60)
	-Pascal avoids this altogether
		disadvantage is less efficient use of memory (minor)
** like parameterless call/return
***	optimizations
		-only "called" from surrounding block
			=> static and dynamic link is same, only need one
			=> no jump needed
		-only returns to one place
			=> no jump needed
***	-static links: always points to surrounding block
***	-display: save previous contents of top on entry, restore on return