From a1e2261d50ad47f4e2137d86a6fe98cb01f3a2ee Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Thu, 23 Jan 2025 16:02:02 -0500
Subject: [PATCH] create Board and Piece types

---
 .gitignore  |  1 +
 Cargo.lock  |  7 +++++++
 Cargo.toml  |  6 ++++++
 src/main.rs |  5 +++++
 src/repr.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 63 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs
 create mode 100644 src/repr.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a768ae0
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "othello"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3af4f43
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "othello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..71b2fcc
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,5 @@
+mod repr;
+
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/src/repr.rs b/src/repr.rs
new file mode 100644
index 0000000..63de19e
--- /dev/null
+++ b/src/repr.rs
@@ -0,0 +1,44 @@
+#[derive(Copy, Clone)]
+pub enum Piece {
+    Black,
+    White,
+}
+
+const BOARD_SIZE: usize = 8;
+
+#[derive(Copy, Clone)]
+pub struct Board {
+    board: [[Option<Piece>; BOARD_SIZE]; BOARD_SIZE],
+}
+
+impl Board {
+    pub const fn new() -> Self {
+        Self {
+            board: [[None; BOARD_SIZE]; BOARD_SIZE],
+        }
+    }
+
+    /// Returns a mutable reference to a place on the [`Board`]
+    /// at (i, j)
+    pub const fn get_mut(&mut self, i: usize, j: usize) -> &mut Option<Piece> {
+        &mut self.board[i][j]
+    }
+
+    /// Returns a reference to a place on the [`Board`]
+    /// at (i, j)
+    pub const fn get(&self, i: usize, j: usize) -> &Option<Piece> {
+        &self.board[i][j]
+    }
+
+    /// Place a piece on the [`Board`]
+    /// Returns an error if there already exists a piece there
+    pub fn place(&mut self, i: usize, j: usize, piece: Piece) -> Result<(), String> {
+        if self.get(i, j).is_some() {
+            return Err(format!("Cannot place on ({},{}), piece exists", i, j));
+        } else {
+            *self.get_mut(i, j) = Some(piece);
+        }
+
+        Ok(())
+    }
+}