From 345f0135a798a25d0ae6197b81050702524fdfdf Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 11 Mar 2021 11:23:13 +0000
Subject: [PATCH] occult ilks: Wrap in some structures

This will help with future-proofing savefiles.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/global.rs     | 9 +++++++--
 src/occultilks.rs | 7 ++++++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/global.rs b/src/global.rs
index b2fe85d9..2e093a59 100644
--- a/src/global.rs
+++ b/src/global.rs
@@ -46,7 +46,7 @@ pub struct Instance {
   pub name: Arc<InstanceName>,
   pub gs: GameState,
   pub ipieces: IPieces,
-  pub ioccults: OccultIlks,
+  pub ioccults: IOccults,
   pub clients: DenseSlotMap<ClientId, Client>,
   pub iplayers: SecondarySlotMap<PlayerId, PlayerRecord>,
   pub tokens_players: TokenRegistry<PlayerId>,
@@ -81,6 +81,11 @@ pub type ActualIPieces = SecondarySlotMap<PieceId, IPiece>;
 #[derive(Copy,Clone,Debug)]
 pub struct ModifyingPieces(());
 
+#[derive(Debug,Serialize,Deserialize,Default)]
+pub struct IOccults {
+  pub ilks: OccultIlks,
+}
+
 #[derive(Debug,Serialize,Deserialize,Default)]
 #[serde(transparent)]
 pub struct GPieces(pub(in crate::global) ActualGPieces);
@@ -1019,7 +1024,7 @@ impl InstanceGuard<'_> {
   fn load_game(accounts: &AccountsGuard,
                games: &mut GamesGuard,
                name: InstanceName) -> Option<InstanceRef> {
-    let InstanceSaveAccesses::<String,ActualIPieces,OccultIlks>
+    let InstanceSaveAccesses::<String,ActualIPieces,IOccults>
     { tokens_players, mut ipieces, ioccults, mut aplayers, acl, links }
     = match Self::load_something(&name, "a-") {
       Ok(data) => data,
diff --git a/src/occultilks.rs b/src/occultilks.rs
index 44a108eb..81d912b8 100644
--- a/src/occultilks.rs
+++ b/src/occultilks.rs
@@ -16,10 +16,15 @@ pub struct OccultIlkOwningId(Id);
 #[serde(transparent)]
 pub struct OccultIlkName(pub String);
 
+#[derive(Debug,Serialize,Deserialize)]
+pub struct OccultIlkData {
+  pub p_occ: Box<dyn OccultedPieceTrait>,
+}
+
 type Id = OccultIlkId;
 type OId = OccultIlkOwningId;
 type K = OccultIlkName;
-type V = Box<dyn OccultedPieceTrait>;
+type V = OccultIlkData;
 type Refcount = u32;
 
 #[derive(Debug,Serialize,Deserialize,Default)]
-- 
2.30.2