/// <summary>
/// 使用词法单元的相关信息初始化 <see cref="Token{T}"/> 类的新实例。
/// </summary>
/// <param name="id">标识符。</param>
/// <param name="text">文本。</param>
/// <param name="start">起始位置。</param>
/// <param name="end">结束位置。</param>
public Token(T id, string text, SourcePosition start, SourcePosition end)
{
CommonExceptions.CheckSourceRange(start, end);
Contract.EndContractBlock();
this.id = id;
this.text = text;
this.start = start;
this.end = end;
}