and there is no need for support from the operating system.

It is possible to implement coroutines using preemptively-scheduled threads, in a way that will be transparent to the calling code, but some of the advantages (particularly the suitability for hard-realtime operation and relative cheapness of switching between them) will be lost.

Generators

Generators, also known as semicoroutines, are a subset of coroutines. Specifically, while both can yield multiple times, suspending their execution and allowing re-entry at

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