pad.md

Certainly! To organize your Rust code into a more manageable structure, you can break it down into multiple modules and files. Here's a suggested file structure for your chess engine:

src/
├── lib.rs
├── board.rs
├── move.rs
├── piece.rs
├── game.rs
└── utils.rs

Here's a breakdown of what each file could contain:

• lib.rs: The entry point of your library. It will declare all the modules and make them accessible to other parts of your program.
• board.rs: Contains the Board struct and associated methods for manipulating the chessboard.
• move.rs: Contains the Move and ScoredMove structs and related functionality.
• piece.rs: Contains the PieceType enum and any related functionality.
• game.rs: Contains game logic, such as making and unmaking moves, evaluating the board, and searching for the best moves.
• utils.rs: Contains utility functions like get_rank, get_file, and any other helper functions that don't belong to a specific struct.

Here's how you might start refactoring your code:

1. lib.rs:

// lib.rs
pub mod board;
pub mod piece;
pub mod game;
pub mod utils;
pub mod r#move; // 'move' is a reserved keyword, so we use raw identifier syntax

2. board.rs:

// board.rs
use crate::piece::PieceType;
use crate::r#move::Move;
use crate::utils::{get_rank, get_file};

#[derive(Clone, Debug, PartialEq)]
pub struct Board {
    // ... fields ...
}

impl Board {
    // ... methods ...
}

3. move.rs:

// move.rs
use crate::piece::PieceType;

#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Move {
    // ... fields ...
}

impl Move {
    // ... methods ...
}

pub struct ScoredMove {
    // ... fields ...
}

impl ScoredMove {
    // ... methods ...
}

4. piece.rs:

// piece.rs
#[derive(Hash, PartialEq, Eq, Clone, Copy, Debug)]
pub enum PieceType {
    // ... variants ...
}

5. game.rs:

// game.rs
use crate::board::Board;
use crate::r#move::{Move, ScoredMove};

impl Board {
    // ... game-related methods ...
}

6. utils.rs:

// utils.rs
pub fn get_rank(square: u8) -> u8 {
    // ... implementation ...
}

pub fn get_file(square: u8) -> u8 {
    // ... implementation ...
}

// ... other utility functions ...

After splitting the code into these files, you can import them back into board.rs or any other file where they're needed using crate::module_name::ItemName. For example, in board.rs, you would import the Move struct like this:

use crate::r#move::Move;

And in game.rs, you would import the Board struct like this:

use crate::board::Board;

Remember to move the relevant code to each file and ensure that all the necessary items are pub (public) so they can be accessed from other modules. You may also need to adjust visibility and add use statements to resolve any compilation errors due to the refactoring.

This structure should help you organize your code better and make it more maintainable.