1//! Defines a constant for each file on the board. 2 3pub const FILE_A: usize = 0; 4pub const FILE_B: usize = 1; 5pub const FILE_C: usize = 2; 6pub const FILE_D: usize = 3; 7pub const FILE_E: usize = 4; 8pub const FILE_F: usize = 5; 9pub const FILE_G: usize = 6; 10pub const FILE_H: usize = 7;