A part of [Concurrency concepts].

Generators are a fundamental part of the Icon programming language [http://www.cs.arizona.edu/icon/index.htm] and were later borrowed by other
languages.  In Icon generators and co-expressions are related but not identical.
''(Added by [escargo] 10/24/2002)''

[[also called "co-expressions", or, by [Knuth], "semi-coroutines"]]