Pre- and post-savefile callbacks.

The constructor of class SavefileCallback can be used to add a callback
which is called before a game is saved and after it's restored.  This is
useful to move data in and out of you.props, or after a restore if
there's data not stored in the savefile which can be easily regenerated.

NOTE: I experienced some weirdness with C++ global constructors, and
since global constructors probably differ with compiler and system,
until this has been tested on all compiler/system combinations, any code
which uses the callbacks should fail gracefully if the callbacks aren't
called.

1 files changed, 5 insertions, 0 deletions

diff --git a/crawl-ref/source/newgame.cc b/crawl-ref/source/newgame.cc
index ffb56cf046..e36fa10a01 100644
--- a/crawl-ref/source/newgame.cc
+++ b/crawl-ref/source/newgame.cc
@@ -898,6 +898,11 @@ game_start:
     fix_up_jiyva_name();
 
     _save_newgame_options();
+
+    // Pretend that a savefile was just loaded, in order to
+    // get things setup properly.
+    SavefileCallback::post_restore();
+
     return (true);
 }