Jerry Krinock wrote:
Does anyone have an idiom or way of appreciating this problem which
does not produce such spaghetti and headaches?
How about a state machine:
enum State { STATE_INIT, STATE_PREPARE, STATE_EXECUTE, STATE_FINISHED,
STATE_DEAD };
State state;
HandleEvent(event)
{
switch (state) {
case STATE_INIT:
// initialize here
state = STATE_PREPARE:
// fallthru
case STATE_PREPARE:
if (need_some_particular_state_first) { break; }
if (need_user_response) { ask_for_it(); break; }
state = STATE_EXECUTE;
// fallthru
case STATE_EXECUTE:
// do stuff
state = STATE_FINISHED; // so when display is dismissed we continue
display_results();
break;
case STATE_FINISHED:
// wrap up
state = STATE_DEAD;
// fallthru
case STATE_DEAD:
break;
default:
assert(0);
}
}
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