/// <summary>
/// 链式值类型基类
/// </summary>
/// <param name="previous">上一个值</param>
public KeyWordLinkValueItemBase(KeyWordLinkValueItemBase previous)
{
_previous = previous;
}
/// <summary>
/// Case的Else关键字项
/// </summary>
/// <param name="value">值</param>
/// <param name="previous">上一个关键字</param>
public KeyWordCaseElseItem(BQLValueItem value, KeyWordLinkValueItemBase previous)
: base(value, previous)
{
}
/// <summary>
/// Case关键字项
/// </summary>
/// <param name="value">值</param>
/// <param name="previous">上一个关键字</param>
public KeyWordCaseItem(BQLValueItem value, KeyWordLinkValueItemBase previous)
: base(previous)
{
this.itemValue = value;
}
/// <summary>
/// Case项
/// </summary>
/// <param name="whenValue">when的值</param>
/// <param name="thenValue">then的值</param>
/// <param name="previous">上一个关键字</param>
internal KeyWordCaseThenItem(BQLValueItem whenValue, BQLValueItem thenValue, KeyWordLinkValueItemBase previous)
: base(previous)
{
this.whenValue = whenValue;
this.thenValue = thenValue;
}
/// <summary>
/// Case项
/// </summary>
/// <param name="value">条件或值</param>
/// <param name="previous">上一个关键字</param>
internal KeyWordCaseWhenItem(BQLValueItem value, KeyWordLinkValueItemBase previous)
{
this.value = value;
this.previous = previous;
}
