On Nov 17, 2011, at 10:53 AM, Matthias Felleisen wrote: > > On Nov 17, 2011, at 1:47 PM, John Clements wrote: > >> Suppose you run a big-bang program that puts a dot on the screen every time >> you press a key. Now suppose it runs for 1K steps and halts. The user sees >> that the window is frozen, but probably won't figure out that the way to >> un-freeze it is to go to the stepper window and advance past the end of the >> currently-computed steps. > > Perhaps 'universe' should have a 'stepper' entry point so that it can signal > to programmers that it is waiting for stepper input. -- Matthias
This sounds complicated (for you and me to implement). What would the user see? John
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