将我的班级转换为Int64，Double等 [英] Casting my Class to Int64, Double etc

问题描述

相关问题:在不使用点运算符的情况下访问Class属性

我创建了一个名为MyDouble的类，看起来像这样

I've created a class called MyDouble looks like this

class MyDouble
{
  double value;
  //overloaded operators and methods
}

我能够在MyDouble上进行各种操作.例子:

I am able to do all kinds of operations on MyDouble. Examples:

MyDouble a = 5.0;
a += 3.0;
...etc

但是，这仍然会引发错误

However, this still throws an error

MyDouble a = 5.0;
long b = (Int64)a;  //error
long b = (int64)a.value; //works

如何定义它，以便像(Int64)a这样的操作自动转换为(Int64)a.value?我不想让用户不必担心value属性的存在.

How can I define it such that an operation like (Int64)a automatically converts to (Int64)a.value ? I don't want the user to ever have to worry about the existence of the value property.

推荐答案

为使此转换正常进行，您需要一个

In order for this conversion to work, you would need an explicit conversion to Int64.

这看起来像:

class MyDouble
{
    double value;

    public static explicit operator Int64(MyDouble value)
    {
         return (Int64)value.value;
    }
}

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