C# 遍历Struct

索引器

struct Point
{
    double x;
    double y;
    double z;    
    public double this[int x]
    {
        get
        {
            switch (x)
            {
                case 0: return x; 
                case 1: return y; 
                case 2: return z; 
                default: throw new ArgumentOutOfRangeException();
            }
        }
    }
}
/*
这样就可以使用p[0],p[1],p[2]来访问p.x, p.y, p.z了（p = new Point()）
*/

枚举器

struct Point
{
    double x;
    double y;
    double z;
    public IEnumerator<double> GetEnumerator()
    {
        return MyIE();
    }

    public IEnumerator<double> MyIE()
    {
        yield return x;
        yield return y;
        yield return z;
    }
}

需要注意的是枚举值是只读的，所以没有办法对数据进行修改
如果是要对多个结构枚举，可以使用using语句来实现，具体参考using-foreach-to-iterate-simultaneously-through-multiple-lists

反射机制

public User(string name, int year, bool gender)
{
    this.name = name;
    this.year = year;
    this.gender = gender;
}
User user = new User("miao", 23, true);
foreach (FieldInfo field in typeof(User).GetFields(BindingFlags.Instance |
                                                 BindingFlags.NonPublic |
                                                 BindingFlags.Public))
 {
     Debug.LogFormat("{0} = {1}", field.Name, field.GetValue(user));
 }

参考StackOverflow
反射的耗时大概是直接放问的两三倍，所以还是尽量直接访问吧~