use proper type for bitboard indexing

src/repr/bitboard.rs

@@ -1,6 +1,6 @@
 use super::{
     board::Board,
-    coords::{CoordAxis, CoordPair},
+    coords::{CoordPair, CoordPairInner},
 };
 use const_fn::const_fn;
 use static_assertions::const_assert;
@@ -53,24 +53,24 @@ impl BitBoard {
     }
 
     #[cfg(not(feature = "bitvec"))]
-    const fn get_by_index(&self, index: CoordAxis) -> bool {
+    const fn get_by_index(&self, index: CoordPairInner) -> bool {
         ((self.0 >> index) & 0b1) != 0b0
     }
 
     #[cfg(not(feature = "bitvec"))]
-    const fn set_by_index(&mut self, index: CoordAxis, value: bool) {
+    const fn set_by_index(&mut self, index: CoordPairInner, value: bool) {
         // PERF! branchless setting of bit (~+3% perf bump)
         self.0 &= !(0b1 << index); // clear bit
         self.0 |= (value as BitBoardInner) << index; // set bit (if needed)
     }
 
     #[cfg(feature = "bitvec")]
-    pub fn get_by_index(&self, index: CoordAxis) -> bool {
+    pub fn get_by_index(&self, index: CoordPairInner) -> bool {
         self.0[index as usize]
     }
 
     #[cfg(feature = "bitvec")]
-    pub fn set_by_index(&mut self, index: CoordAxis, value: bool) {
+    pub fn set_by_index(&mut self, index: CoordPairInner, value: bool) {
         self.0.set(index as usize, value);
     }