connect-four-ai 0.1.2

A high-performance Rust implementation of a perfect Connect Four solver.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

//! An enum for errors that can occur when parsing Connect Four positions.

use std::error::Error;
use std::fmt::{Display, Formatter};

/// An enum for errors that can occur when parsing Connect Four positions.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum PositionParsingError {
    /// The board string has an invalid number of characters.
    InvalidBoardStringLength { actual: usize, expected: usize },
    /// The move sequence contains an invalid (non-numeric) character.
    InvalidCharacter { character: char, index: usize },
    /// The move sequence contains an invalid, out of range column.
    InvalidColumn { column: usize, index: usize },
    /// The move sequence contains an invalid move as a result of a full column.
    InvalidFullColumnMove { column: usize, index: usize },
    /// The move sequence contains an invalid move that results in a winning position.
    InvalidWinningMove { column: usize, index: usize },
}

impl Display for PositionParsingError {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self {
            PositionParsingError::InvalidBoardStringLength { actual, expected } => {
                write!(f, "invalid board string length: found {actual}, expected {expected}")
            }
            PositionParsingError::InvalidCharacter { character, index } => {
                write!(f, "invalid character '{character}' at index {index}")
            }
            PositionParsingError::InvalidColumn { column, index } => {
                write!(f, "invalid column {column} at index {index}")
            }
            PositionParsingError::InvalidFullColumnMove { column, index } => {
                write!(f, "invalid move at index {index}: column {column} is full")
            }
            PositionParsingError::InvalidWinningMove { column, index } => {
                write!(f, "invalid move at index {index}: column {column} results in a win")
            }
        }
    }
}

impl Error for PositionParsingError {}