From f7c47c4d85847684d726d521673c0c571fcbc35b Mon Sep 17 00:00:00 2001
From: Paul-Nicolas Madelaine <pnm@pnm.tf>
Date: Sat, 29 Nov 2025 14:12:20 +0100
Subject: [PATCH] impl Default for Bitboard, Setup & Position

---
 src/bitboard.rs | 2 +-
 src/position.rs | 9 ++++++++-
 src/setup.rs    | 7 +++++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/bitboard.rs b/src/bitboard.rs
index 7639929..dd225fa 100644
--- a/src/bitboard.rs
+++ b/src/bitboard.rs
@@ -3,7 +3,7 @@
 use crate::board::*;
 
 /// A set of squares.
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
 pub struct Bitboard(pub u64);
 
 impl Bitboard {
diff --git a/src/position.rs b/src/position.rs
index 371b69a..11eaba0 100644
--- a/src/position.rs
+++ b/src/position.rs
@@ -196,7 +196,7 @@ impl Position {
                 .as_setup()
                 .en_passant
                 .map(|square| square.bitboard())
-                .unwrap_or(Bitboard::new()),
+                .unwrap_or_default(),
         };
         self.generate_moves(&mut moves).is_break()
     }
@@ -478,6 +478,13 @@ impl core::fmt::Debug for Position {
     }
 }
 
+impl Default for Position {
+    #[inline]
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[derive(Clone, Copy)]
 pub(crate) struct RawMove {
     pub kind: MoveType,
diff --git a/src/setup.rs b/src/setup.rs
index 3961f27..f8584b1 100644
--- a/src/setup.rs
+++ b/src/setup.rs
@@ -541,6 +541,13 @@ impl core::fmt::Debug for Setup {
     }
 }
 
+impl Default for Setup {
+    #[inline]
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 /// An invalid position.
 ///
 /// This is an illegal position that can't be represented with the [`Position`] type.