use chunk_by from rust 1.77

Cargo.toml

@@ -10,6 +10,7 @@ categories = ["games"]
 keywords = ["chess", "syzygy", "tablebase"]
 exclude = ["tables/**/*.*tb*"]
 edition = "2021"
+rust-version = "1.77"
 
 [[bench]]
 name = "benches"

src/lib.rs

@@ -42,7 +42,6 @@
 
 #[macro_use]
 mod errors;
-mod chunk_by;
 mod material;
 mod table;
 mod tablebase;

src/table.rs

@@ -7,7 +7,6 @@ use positioned_io::{RandomAccessFile, ReadAt, ReadBytesAtExt as _};
 use shakmaty::{Bitboard, Color, File, Piece, Position, Rank, Role, Square};
 
 use crate::{
-    chunk_by::ChunkBy,
     errors::{ProbeError, ProbeResult},
     material::Material,
     types::{DecisiveWdl, MaybeRounded, Metric, Pieces, Syzygy, Wdl, MAX_PIECES},
@@ -473,11 +472,9 @@ fn group_pieces(pieces: &Pieces) -> ArrayVec<usize, MAX_PIECES> {
 
     // The remaining identical pieces are grouped together.
     result.extend(
-        ChunkBy {
-            slice: &pieces[first_len..],
-            predicate: |l: &Piece, r: &Piece| l == r,
-        }
-        .map(|chunk| chunk.len()),
+        pieces[first_len..]
+            .chunk_by(Piece::eq)
+            .map(|chunk| chunk.len()),
     );
 
     result