[bitboard] Make the bitboard crate more crate-like

Export symbols needed to use BitBoard and BitBoardBuilder.
Fix build errors.

bitboard/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "chess_bitboard"
+name = "chessfriend_bitboard"
 version = "0.1.0"
 edition = "2021"
 

bitboard/src/bitboard.rs

@@ -7,7 +7,7 @@ use std::fmt;
 use std::ops::Not;
 
 #[derive(Clone, Copy, Eq, Hash, PartialEq)]
-pub(crate) struct BitBoard(pub(super) u64);
+pub struct BitBoard(pub(crate) u64);
 
 macro_rules! moves_getter {
     ($getter_name:ident) => {
@@ -71,13 +71,13 @@ impl BitBoard {
 impl BitBoard {
     /// Return an Iterator over the occupied squares, starting from the leading
     /// (most-significant bit) end of the field.
-    pub(crate) fn occupied_squares(&self) -> impl Iterator<Item = Square> {
+    pub fn occupied_squares(&self) -> impl Iterator<Item = Square> {
         LeadingBitScanner::new(self.0).map(|idx| unsafe { Square::from_index(idx as u8) })
     }
 
     /// Return an Iterator over the occupied squares, starting from the trailing
     /// (least-significant bit) end of the field.
-    pub(crate) fn occupied_squares_trailing(&self) -> impl Iterator<Item = Square> {
+    pub fn occupied_squares_trailing(&self) -> impl Iterator<Item = Square> {
         LeadingBitScanner::new(self.0).map(|idx| unsafe { Square::from_index(idx as u8) })
     }
 }
@@ -244,7 +244,7 @@ impl BitBoardBuilder {
 mod tests {
     use super::*;
     use crate::bitboard;
-    use chess_core::Square;
+    use chessfriend_core::Square;
 
     #[test]
     fn display_and_debug() {

bitboard/src/lib.rs

@@ -5,13 +5,14 @@ mod bitboard;
 mod library;
 mod shifts;
 
+pub use bitboard::{BitBoard, BitBoardBuilder};
+
 pub(crate) use bit_scanner::{LeadingBitScanner, TrailingBitScanner};
-pub(crate) use bitboard::{BitBoard, BitBoardBuilder};
 
 #[macro_export]
 macro_rules! bitboard {
     ($($sq:ident),* $(,)?) => {
-        $crate::bitboard::BitBoardBuilder::empty()
+        $crate::BitBoardBuilder::empty()
             $(.square(chessfriend_core::Square::$sq))*
             .build()
     };

bitboard/src/library.rs

@@ -1,6 +1,6 @@
 // Eryn Wells <eryn@erynwells.me>
 
-use super::BitBoard;
+use crate::BitBoard;
 use chessfriend_core::{Direction, Square};
 use std::sync::Once;