BcfIntSequence Class

public class BcfIntSequence : IBcfSequence<int>

Public Class BcfIntSequence
	Implements IBcfSequence(Of Integer)

  public class BcfIntSequence : IBcfSequence<int> {
    private int _current;
    private readonly int _start;
    private readonly int _step;

    public BcfIntSequence(int start = 0, int step = 1) {
        if(step == 0) throw new ArgumentException("Zero is not a valid step.", nameof(step));
        _start = start;
        _step = step;
        Reset();
    }

    public int Next(BcfColumn<int> column) {
        _current += _step;
        return _current;
    }

    public void Accept(BcfColumn<int> column, int value) {
        if (_step > 0 && value > _current) _current = value;
        if (_step < 0 && value < _current) _current = value;
    }

    public void Reset() {
        _current = _start - _step;
    }
}