是否有可能创建构造扩展法？怎么样？ [英] Is it possible to create constructor-extension-method ? how?

问题描述

是否有可能增加一个构造函数扩展方法？我想补充一个List< T>构造成接收字节特定量出一个给定的部分填充的缓冲器的（不仅复制相关字节等的开销）：

Is it possible to add a constructor extension method ? I want to add a List< T > constructor to receive specific amount of bytes out of a given partially filled buffer (without the overhead of copying only the relevant bytes and so on):

...
public static List<T>(this List<T> l, T[] a, int n)
{
    for (int i = 0; i < n; i++)
       l.Add(a[i]);
}
...

所以用法是：

so the usage would be:

List<byte> some_list = new List<byte>(my_byte_array,number_of_bytes);

我已经添加了一个扩展的AddRange方法：

I've already added an AddRange extension method:

public static void AddRange<T>(this List<T> l, T[] a, int n)
{
   for (int i = 0; i < n; i++)
       l.Add(a[i]);
}

我想这样做，作为构造了。是否可以 ？如果是的话 - 如何

I want to do it as a constructor too. Is it possible ? if yes - how ?

推荐答案

没有，但是如果你改变了你的的AddRange 签名返回列表实例，那么你至少可以做

No, but if you changed your AddRange signature to return the list instance, then you could at least do

var list = new List<int>().AddRange(array, n);

恕我直言，这很可能比反正超载的构造更清晰。

which imho is probably clearer than overloading the constructor anyway.

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