Track whether a monster has shown it has a ranged attack.

This fixes information leaks (the other option would be to include
bows/crossbows slung across the shoulder in "comes into view" messages).

This also allows resting when there's a sentient monster on the other
side of water and it has no means of attacking us. If this proved to be
false and it did have darts hidden in a pocket but never chose to use
them before, the attack will interrupt rest as usual.

Monsters are considered to have a ranged attack they're:
* non-ghost/demon with ranged/summoning spells
  There is no randomization that would change this.
* ghost/demons who have cast _any_ spell.  It's prudent to assume that if
  they cast spells at all, they likely have something nasty.
* are of a type which usually starts with a ranged weapon (centaurs, etc),
  and are not a known shapeshifter
* were seen wielding a bow/etc
* were seen shooting/throwing something
* were seen picking a bow/dart/hand axe/...
* were seen zapping a wand

1 files changed, 1 insertions, 0 deletions

diff --git a/crawl-ref/source/mon-flags.h b/crawl-ref/source/mon-flags.h
index 0ccf9073e0..c90051a0a0 100644
--- a/crawl-ref/source/mon-flags.h
+++ b/crawl-ref/source/mon-flags.h
@@ -214,4 +214,5 @@ const uint64_t MF_NAME_ZOMBIE         = BIT(32); // mname replaces zombies/skele
 const uint64_t MF_SENSED              = BIT(33); // Player has been warned
                                       // about this monster being nearby.
 const uint64_t MF_NAME_NOCORPSE       = BIT(34); // mname should not be used for corpses
+const uint64_t MF_SEEN_RANGED         = BIT(35); // known to have a ranged attack
 #endif