使用数组语法初始化我的类

Question

但是,无论如何都要像数组或字典那样初始化我的类

    private class A
    {
        private List<int> _evenList;
        private List<int> _oddList;
        ...
    }

并说

A a = new A {1, 4, 67, 2, 4, 7, 56};

并在我的构造函数中填充_ evenList和_ oddList及其值.

Answer 1

要使用集合初始值设定项,您的类必须:

• 实行 IEnumerable
• 实施适当的Add方法

例如:

class A : IEnumerable
{
    private List<int> _evenList = new List<int>();
    private List<int> _oddList = new List<int>();

    public void Add(int value)
    {
        List<int> list = (value & 1) == 0 ? _evenList : _oddList;
        list.Add(value);
    }

    // Explicit interface implementation to discourage calling it.
    // Alternatively, actually implement it (and IEnumerable<int>)
    // in some fashion.
    IEnumerator IEnumerable.GetEnumerator()
    {
        throw new NotImplementedException("Not really enumerable...");
    }
}