From a0aacfde67882c6e77cdbc2da139ec004145ba25 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 30 Apr 2022 02:21:13 +0100
Subject: [PATCH] PieceTrait: impl Downcast

We're going to want this in a moment.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/gamestate.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gamestate.rs b/src/gamestate.rs
index 8596e500..242aa00b 100644
--- a/src/gamestate.rs
+++ b/src/gamestate.rs
@@ -197,7 +197,7 @@ pub trait PieceBaseTrait: OutlineTrait + Send + Debug + 'static {
 
 #[ambassador::delegatable_trait]
 #[typetag::serde] // usual variable: p
-pub trait PieceTrait: PieceBaseTrait + Send + Debug + 'static {
+pub trait PieceTrait: PieceBaseTrait + Downcast + Send + Debug + 'static {
   fn add_ui_operations(&self, _y: ShowUnocculted,
                        _upd: &mut Vec<UoDescription>,
                        _gs: &GameState, _gpc: &GPiece) -> Result<(),IE> {
@@ -287,6 +287,7 @@ pub trait PieceTrait: PieceBaseTrait + Send + Debug + 'static {
               .into_inner().unwrap() })
   }
 }
+impl_downcast!(PieceTrait);
 
 #[typetag::serde]
 pub trait InertPieceTrait: PieceBaseTrait {
-- 
2.30.2