AdventOfCode23/Day24/Parser.cs

using System.Text.RegularExpressions;

namespace Day24;

public partial class Parser
{
    private static readonly char[] _separators = new char[] { '@', ',' };
    
    [GeneratedRegex(@".*")]
    private partial Regex LineMatch();
    
    public IEnumerable<Line3> Parse(string inputFile)
    {
        using var reader = File.OpenText(inputFile);
        
        while (!reader.EndOfStream)
        {
            var line = reader.ReadLine()!;
            var numbers = line.Split(_separators,
                StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries)
                .Select(long.Parse).ToArray();

            yield return new Line3(
                Vec3.FromSpan(numbers),
                Vec3.FromSpan(numbers.AsSpan().Slice(3))
            );
        }
    }
}