using CanonSharp.Common.Abstractions;

namespace CanonSharp.Common.Reader;

public class StringReader(string source) : ISourceReader
{
    private int _pos;

    public char Read()
    {
        if (_pos >= source.Length)
        {
            throw new InvalidOperationException();
        }

        char result = source[_pos];
        _pos += 1;
        return result;

    }

    public bool TryPeek(out char c)
    {
        if (_pos < source.Length)
        {
            c = source[_pos];
            return true;
        }

        c = char.MinValue;
        return false;
    }
}