Updated rust dependencies

GameState::reward_for_player is no longer a trait function
We need GameState::rewards_for_players implemented, the library currently doesn't need to specify for a singular player.
2026-07-07 12:29:54 -07:00 · 2025-06-30 21:41:49 -07:00 · 2025-06-30 21:41:27 -07:00 · 2025-06-30 20:08:18 -07:00 · 2025-06-29 22:51:17 -07:00 · 2025-06-29 22:50:54 -07:00
7 changed files with 124 additions and 271 deletions
@@ -4,36 +4,36 @@ version = 4

 [[package]]
 name = "anstyle"
-version = "1.0.11"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "862ed96ca487e809f1c8e5a8447f6ee2cf102f846893800b20cebdf541fc6bbd"
+checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"

 [[package]]
 name = "bitflags"
-version = "2.9.1"
+version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
+checksum = "b4388bee8683e3d04af747c73422af53102d2bd24d9eadb6cbc100baef4b43f8"

 [[package]]
 name = "cfg-if"
-version = "1.0.1"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
+checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"

 [[package]]
 name = "clap"
-version = "4.5.40"
+version = "4.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40b6887a1d8685cebccf115538db5c0efe625ccac9696ad45c409d96566e910f"
+checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
 dependencies = [
 "clap_builder",
 ]

 [[package]]
 name = "clap_builder"
-version = "4.5.40"
+version = "4.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0c66c08ce9f0c698cbce5c0279d0bb6ac936d8674174fe48f736533b964f59e"
+checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
 dependencies = [
 "anstyle",
 "clap_lex",
@@ -42,9 +42,9 @@ dependencies = [

 [[package]]
 name = "clap_lex"
-version = "0.7.5"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b94f61472cee1439c0b966b47e3aca9ae07e45d070759512cd390ea2bebc6675"
+checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"

 [[package]]
 name = "condtype"
@@ -79,37 +79,37 @@ dependencies = [

 [[package]]
 name = "errno"
-version = "0.3.13"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
+checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
 "libc",
- "windows-sys 0.60.2",
+ "windows-sys",
 ]

 [[package]]
 name = "getrandom"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
+checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
 dependencies = [
 "cfg-if",
 "libc",
 "r-efi",
- "wasi",
+ "wasip2",
 ]

 [[package]]
 name = "libc"
-version = "0.2.174"
+version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
+checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"

 [[package]]
 name = "linux-raw-sys"
-version = "0.9.4"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"
+checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"

 [[package]]
 name = "ppv-lite86"
@@ -122,18 +122,18 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.95"
+version = "1.0.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
+checksum = "8fd00f0bb2e90d81d1044c2b32617f68fcb9fa3bb7640c23e9c748e53fb30934"
 dependencies = [
 "unicode-ident",
 ]

 [[package]]
 name = "quote"
-version = "1.0.40"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
+checksum = "dfbc457d0c7a0759a614551b11a6409e5951f6c7537be1f1b7682b9ae9230368"
 dependencies = [
 "proc-macro2",
 ]
@@ -146,9 +146,9 @@ checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"

 [[package]]
 name = "rand"
-version = "0.9.1"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
+checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
 "rand_chacha",
 "rand_core",
@@ -166,18 +166,18 @@ dependencies = [

 [[package]]
 name = "rand_core"
-version = "0.9.3"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
 dependencies = [
 "getrandom",
 ]

 [[package]]
 name = "regex-lite"
-version = "0.1.6"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53a49587ad06b26609c52e423de037e7f57f20d53535d66e08c695f347df952a"
+checksum = "cab834c73d247e67f4fae452806d17d3c7501756d98c8808d7c9c7aa7d18f973"

 [[package]]
 name = "rustic_mcts"
@@ -190,22 +190,22 @@ dependencies = [

 [[package]]
 name = "rustix"
-version = "1.0.7"
+version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c71e83d6afe7ff64890ec6b71d6a69bb8a610ab78ce364b3352876bb4c801266"
+checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
 dependencies = [
 "bitflags",
 "errno",
 "libc",
 "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]

 [[package]]
 name = "syn"
-version = "2.0.103"
+version = "2.0.118"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4307e30089d6fd6aff212f2da3a1f9e32f3223b1f010fb09b7c95f90f3ca1e8"
+checksum = "1b9ae57f904213ebb649ce6895b8a66c66f0203b9319718f69a5612a065b1422"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -214,28 +214,28 @@ dependencies = [

 [[package]]
 name = "terminal_size"
-version = "0.4.2"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45c6481c4829e4cc63825e62c49186a34538b7b2750b73b266581ffb612fb5ed"
+checksum = "230a1b821ccbd75b185820a1f1ff7b14d21da1e442e22c0863ea5f08771a8874"
 dependencies = [
 "rustix",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]

 [[package]]
 name = "thiserror"
-version = "2.0.12"
+version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
+checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "2.0.12"
+version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -244,188 +244,54 @@ dependencies = [

 [[package]]
 name = "unicode-ident"
-version = "1.0.18"
+version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
+checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"

 [[package]]
-name = "wasi"
-version = "0.14.2+wasi-0.2.4"
+name = "wasip2"
+version = "1.0.4+wasi-0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+checksum = "b67efb37e106e55ce722a510d6b5f9c17f083e5fc79afc2badeb12cc313d9487"
 dependencies = [
- "wit-bindgen-rt",
+ "wit-bindgen",
 ]

+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
 [[package]]
 name = "windows-sys"
-version = "0.59.0"
+version = "0.61.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
 dependencies = [
- "windows-targets 0.52.6",
+ "windows-link",
 ]

 [[package]]
-name = "windows-sys"
-version = "0.60.2"
+name = "wit-bindgen"
+version = "0.57.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
-dependencies = [
- "windows-targets 0.53.2",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
-dependencies = [
- "windows_aarch64_gnullvm 0.52.6",
- "windows_aarch64_msvc 0.52.6",
- "windows_i686_gnu 0.52.6",
- "windows_i686_gnullvm 0.52.6",
- "windows_i686_msvc 0.52.6",
- "windows_x86_64_gnu 0.52.6",
- "windows_x86_64_gnullvm 0.52.6",
- "windows_x86_64_msvc 0.52.6",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.53.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
-dependencies = [
- "windows_aarch64_gnullvm 0.53.0",
- "windows_aarch64_msvc 0.53.0",
- "windows_i686_gnu 0.53.0",
- "windows_i686_gnullvm 0.53.0",
- "windows_i686_msvc 0.53.0",
- "windows_x86_64_gnu 0.53.0",
- "windows_x86_64_gnullvm 0.53.0",
- "windows_x86_64_msvc 0.53.0",
-]
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
-
-[[package]]
-name = "windows_i686_gnu"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
-
-[[package]]
-name = "windows_i686_gnu"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
-
-[[package]]
-name = "windows_i686_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
-
-[[package]]
-name = "windows_i686_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.53.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
-
-[[package]]
-name = "wit-bindgen-rt"
-version = "0.39.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
-dependencies = [
- "bitflags",
-]
+checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"

 [[package]]
 name = "zerocopy"
-version = "0.8.26"
+version = "0.8.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f"
+checksum = "75726053136156d419e285b9b7eddaaea9e3fea6ce32eed44a89901f0bd98de1"
 dependencies = [
 "zerocopy-derive",
 ]

 [[package]]
 name = "zerocopy-derive"
-version = "0.8.26"
+version = "0.8.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
+checksum = "4714fd92cf900833d49538023a9b3915155210801d1c1169eba513b2addefd71"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -16,8 +16,8 @@ rand = "~0.9"
 thiserror = "~2.0"

 [dev-dependencies]
-divan = "0.1.21"
+divan = "~0.1"

 [[bench]]
-name = "example"
+name = "e2e"
 harness = false
@@ -61,11 +61,7 @@ struct Move {
    index: usize,
 }

-impl Action for Move {
-    fn id(&self) -> usize {
-        self.index
-    }
-}
+impl Action for Move {}

 /// Tic-Tac-Toe game state
 #[derive(Debug, Clone)]
@@ -129,6 +125,19 @@ impl TicTacToe {

        None
    }
+
+    fn reward_for_player(&self, player: &Player) -> RewardVal {
+        if let Some(winner) = self.get_winner() {
+            if winner == *player {
+                return 1.0; // Win
+            } else {
+                return 0.0; // Loss
+            }
+        }
+
+        // Draw
+        0.5
+    }
 }

 impl GameState for TicTacToe {
@@ -165,19 +174,6 @@ impl GameState for TicTacToe {
        self.get_winner().is_some() || self.moves_played == 9
    }

-    fn reward_for_player(&self, player: &Self::Player) -> RewardVal {
-        if let Some(winner) = self.get_winner() {
-            if winner == *player {
-                return 1.0; // Win
-            } else {
-                return 0.0; // Loss
-            }
-        }
-
-        // Draw
-        0.5
-    }
-
    fn rewards_for_players(&self) -> HashMap<Self::Player, RewardVal> {
        HashMap::from_iter(vec![
            (Player::X, self.reward_for_player(&Player::X)),
@@ -189,4 +185,3 @@ impl GameState for TicTacToe {
        &self.current_player
    }
 }
-
@@ -40,7 +40,6 @@ fn main() {
        // Find the best move
        match mcts.search() {
            Ok(action) => {
-                mcts.print_tree();
                println!(
                    "AI chooses: {} (row {}, col {})",
                    action.index,
@@ -85,11 +84,7 @@ struct Move {
    index: usize,
 }

-impl Action for Move {
-    fn id(&self) -> usize {
-        self.index
-    }
-}
+impl Action for Move {}

 /// Tic-Tac-Toe game state
 #[derive(Clone)]
@@ -153,6 +148,19 @@ impl TicTacToe {

        None
    }
+
+    fn reward_for_player(&self, player: &Player) -> RewardVal {
+        if let Some(winner) = self.get_winner() {
+            if winner == *player {
+                return 1.0; // Win
+            } else {
+                return 0.0; // Loss
+            }
+        }
+
+        // Draw
+        0.5
+    }
 }

 impl GameState for TicTacToe {
@@ -189,19 +197,6 @@ impl GameState for TicTacToe {
        self.get_winner().is_some() || self.moves_played == 9
    }

-    fn reward_for_player(&self, player: &Self::Player) -> RewardVal {
-        if let Some(winner) = self.get_winner() {
-            if winner == *player {
-                return 1.0; // Win
-            } else {
-                return 0.0; // Loss
-            }
-        }
-
-        // Draw
-        0.5
-    }
-
    fn rewards_for_players(&self) -> HashMap<Self::Player, RewardVal> {
        HashMap::from_iter(vec![
            (Player::X, self.reward_for_player(&Player::X)),
@@ -119,11 +119,7 @@ struct Move {
    index: usize,
 }

-impl Action for Move {
-    fn id(&self) -> usize {
-        self.index
-    }
-}
+impl Action for Move {}

 /// Tic-Tac-Toe game state
 #[derive(Clone)]
@@ -195,6 +191,19 @@ impl TicTacToe {

        None
    }
+
+    fn reward_for_player(&self, player: &Player) -> RewardVal {
+        if let Some(winner) = self.get_winner() {
+            if winner == *player {
+                return 1.0; // Win
+            } else {
+                return 0.0; // Loss
+            }
+        }
+
+        // Draw
+        0.5
+    }
 }

 impl GameState for TicTacToe {
@@ -231,19 +240,6 @@ impl GameState for TicTacToe {
        self.get_winner().is_some() || self.moves_played == 9
    }

-    fn reward_for_player(&self, player: &Self::Player) -> RewardVal {
-        if let Some(winner) = self.get_winner() {
-            if winner == *player {
-                return 1.0; // Win
-            } else {
-                return 0.0; // Loss
-            }
-        }
-
-        // Draw
-        0.5
-    }
-
    fn rewards_for_players(&self) -> HashMap<Self::Player, RewardVal> {
        HashMap::from_iter(vec![
            (Player::X, self.reward_for_player(&Player::X)),
@@ -75,9 +75,16 @@ impl<'conf, S: GameState + std::fmt::Debug> MCTS<'conf, S> {
        if !selected_node.state.is_terminal() {
            self.expand(selected_id);
            let children: &Vec<usize> = &self.arena.get_node(selected_id).children;
-            let random_child: usize = *children.choose(&mut rand::rng()).unwrap();
+            match children.choose(&mut rand::rng()) {
+                Some(&random_child) => {
                    selected_id = random_child;
                }
+                None => {
+                    // We ran out of nodes
+                    return Err(MCTSError::NonTerminalGame);
+                }
+            }
+        }
        let rewards = self.simulate(selected_id);
        self.backprop(selected_id, &rewards);

@@ -40,11 +40,11 @@ pub trait GameState: Clone + Debug {
    /// instead should modify a copy of the state and return that.
    fn state_after_action(&self, action: &Self::Action) -> Self;

-    /// Returns the reward from the perspective of the given player for the game state
+    /// Returns the rewards for all players from their perspective for the game state
    ///
-    /// This evaluates the current state from the perspective of the given player, and
-    /// returns the reward indicating how good of a result the given state is for the
-    /// player.
+    /// This evaluates the current state from the perspective of each player, and
+    /// returns a HashMap mapping each player to the result of this evaluation, which
+    /// we call the reward.
    ///
    /// This is used in the MCTS backpropagation and simulation phases to evaluate
    /// the value of a given node in the search tree.
@@ -55,9 +55,6 @@ pub trait GameState: Clone + Debug {
    /// - 0.0 => a loss for the player
    ///
    /// Other values can be used for relative wins or losses
-    fn reward_for_player(&self, player: &Self::Player) -> RewardVal;
-
-    /// Returns the rewards for all players at the current state
    fn rewards_for_players(&self) -> HashMap<Self::Player, RewardVal>;

    /// Returns the player whose turn it is for the game state
@@ -72,10 +69,7 @@ pub trait GameState: Clone + Debug {
 ///
 /// An action is dependent upon the specific game being defined, and includes
 /// things like moves, attacks, and other decisions.
-pub trait Action: Clone + Debug {
-    /// Returns a uniqie identifier for this action
-    fn id(&self) -> usize;
-}
+pub trait Action: Clone + Debug {}

 /// Trait used for players participating in a game
 pub trait Player: Clone + Debug + PartialEq + Eq + Hash {}
Author	SHA1	Message	Date
krugd	3676838082	Updated rust dependencies	2026-07-07 12:29:54 -07:00
krugd	6aa9002e92	GameState::reward_for_player is no longer a trait function We need GameState::rewards_for_players implemented, the library currently doesn't need to specify for a singular player.	2025-06-30 21:41:49 -07:00
krugd	76051cd76b	Removing the id field from the Action trait This would in theory be useful for a transposition table, but we do not currently support that. As such I don't want to burden the implementation with that field until it is deemed necessary.	2025-06-30 21:41:27 -07:00
krugd	a7102a0e44	Fixed missing non terminal error	2025-06-30 20:08:18 -07:00
krugd	a2711f341f	Cleanup debug print	2025-06-29 22:51:17 -07:00
krugd	48c93fa197	Renamed the benchmark file	2025-06-29 22:50:54 -07:00