Factor a visitor object out of apply_to_level

1 files changed, 11 insertions, 2 deletions

diff --git a/crawl-ref/source/files.h b/crawl-ref/source/files.h
index 5c639eeb14..eded735f1b 100644
--- a/crawl-ref/source/files.h
+++ b/crawl-ref/source/files.h
@@ -102,11 +102,20 @@ bool apply_to_all_dungeons(bool (*applicator)());
 
 class level_id;
 
-bool apply_to_level(const level_id &level, bool preserve_current,
-                    bool (*applicator)());
+bool apply_to_level(const level_id &level, bool (*applicator)());
 
 bool is_existing_level(const level_id &level);
 
+class level_excursion
+{
+    level_id original;
+
+public:
+    level_excursion();
+    ~level_excursion();
+
+    void go_to(const level_id &level);
+};
 
 // last updated 12may2000 {dlb}
 /* ***********************************************************************