Activities with results

Authoring Inform 7
1

I was thinking that there weren’t any activities where the result of the rulebook was checked, but it turns out there is one: Deciding whether all includes.

There’s no invocation of it in the Standard Rules, so I assume it’s called from I6.

What I want to know is, is it possible to invoke an activity from I7 and remember the result of the “for” rulebook?

2

Does it work to check “if rule succeeded” afterwards?

3

Doesn’t look like it:

[code]Test is a room.

Detecting shenanigans on something is an activity on objects.

When play begins:
Repeat with item running through things:
carry out the detecting shenanigans on activity with item;
if rule succeeded, say “Shenanigans on [the item].”;
otherwise say “No shenanigans on [the item].”;

For detecting shenanigans on the player: rule succeeds;

There is a ball. For detecting shenanigans on the ball: rule fails;[/code]

4

Extrapolating from the whether-all-includes code, I’d try this:

Include (-
[ CarryOutActivityRes A o rv;
    BeginActivity(A, o);
    ForActivity(A, o);
    rv = RulebookSucceeded();
    EndActivity(A, o);
    return rv;
];
-).

To decide whether carrying out the (A - activity on nothing) activity results:
    (- CarryOutActivityRes({A}) -).
To decide whether carrying out the (A - activity on value of kind K) activity with (val - K) results:
    (- CarryOutActivityRes({A}, {val}) -).

This is untested, and must count as an undocumented I7 feature to begin with.