/// <summary>
/// 使用指定的起始位置和 Tab 宽度初始化 <see cref="SourceReader"/> 类的新实例。
/// </summary>
/// <param name="initPosition">起始位置。</param>
/// <param name="tabSize">Tab 的宽度。</param>
private SourceReader(SourcePosition initPosition, int tabSize)
{
locator = new SourceLocator(initPosition, tabSize);
current = first = last = new SourceBuffer();
firstIndex = lastLength = 0;
current.Next = current;
current.StartIndex = 0;
}
/// <summary>
/// 使用指定的字符读取器和 Tab 宽度初始化 <see cref="SourceReader"/> 类的新实例。
/// </summary>
/// <param name="reader">用于读取源文件的字符读取器。</param>
/// <param name="tabSize">Tab 的宽度。</param>
public SourceReader(TextReader reader, int tabSize)
{
ExceptionHelper.CheckArgumentNull(reader, "reader");
locator = new SourceLocator(tabSize);
this.reader = reader;
current = first = last = new SourceBuffer();
firstIndex = lastLength = 0;
current.Buffer = new char[BufferSize];
current.Next = current;
}