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In message <see-36543E.18592809102007@lust.ihug.co.nz>, Barb Knox wrote:

> Instead of function A returning to its caller, the
> caller provides an additional argument (the "continuation") which is a
> function B to be called by A with A's result(s).

That's just a callback. I've been doing that in C code (and other
similar-level languages) for years.