Return multiple items from items.get_items_at().

Like full_describe_view(), we get the extra items from the stash
tracker; on untracked levels we can get only the top.

Difficulties arise because the stash tracker returns item_defs on the
stack where they cannot safely be pointed to.  To handle this properly,
item_wrapper gains a new boolean member indicating whether the item_def
is a temporary copy (as opposed to an element of mitm, for example); a
new C function clua_push_item_temp() allocates a copy of an item_def and
creates such a wrapper.  If the temporary flag is true, the item_def
will be freed when the wrapper is GCed.

1 files changed, 1 insertions, 0 deletions

diff --git a/crawl-ref/source/cluautil.h b/crawl-ref/source/cluautil.h
index ef725b4f68..9aa5436dae 100644
--- a/crawl-ref/source/cluautil.h
+++ b/crawl-ref/source/cluautil.h
@@ -140,6 +140,7 @@ struct MonsterWrap
 // XXX: These are currently defined outside cluautil.cc.
 void push_monster(lua_State *ls, monster* mons);
 void clua_push_item(lua_State *ls, item_def *item);
+void clua_push_item_temp(lua_State *ls, const item_def &item);
 item_def *clua_get_item(lua_State *ls, int ndx);
 void lua_push_floor_items(lua_State *ls, int link);
 dungeon_feature_type check_lua_feature(lua_State *ls, int idx);