/// <summary>
/// 通过卦名获取别卦。
/// 如果有卦名重复，不保证顺序。
/// Get a hexagram by its name.
/// If some hexagrams' names are duplicate, the order is not guaranteed.
/// </summary>
/// <param name="name">
/// 卦名。
/// The name.
/// </param>
/// <param name="result">
/// 结果。
/// The result.
/// </param>
/// <returns>
/// 一个值，指示是否获取成功。
/// A value indicates whether the hexagram has been found or not.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> 是 <c>null</c> 。
/// <paramref name="name"/> is <c>null</c>.
/// </exception>
public bool TryGetHexagram(string name, [MaybeNullWhen(false)] out ZhouyiHexagram result)
{
if (name is null)
{
throw new ArgumentNullException(nameof(name));
}
var index = this.trigramsAndHexagrams.TryGetHexagram(name, out var t);
if (index != -1)
{
Debug.Assert(t is not null);
var tri = this.hexagramsTrigramsMap.GetTrigrams(index);
result = new ZhouyiHexagram(this.patternsAndNumbers,
index,
t.Name,
t.Text,
t.ApplyNinesOrSixes,
this.trigramsAndHexagrams.GetTrigram(tri.lower),
this.trigramsAndHexagrams.GetTrigram(tri.upper),
t.Lines);
return(true);
}
result = null;
return(false);
}
internal Line(ZhouyiHexagram from, int index, Core.YinYang attribute, string text)
{
this.From = from;
this.LineIndex = index;
this.YinYang = attribute;
this.LineText = text;
}
