我如何乘以一个浮点数和一个泛型类型？ [英] How can I multiply a float and a generic type?

问题描述

我有一个像下面这样的类：

  class Foo< T> 
 {
 public T DoFoo（T bar）
 {
 float aFloatValue = 1.0f; 
 //做其他的东西... 
返回aFloatValue * bar; 
 
 
  

当Unity编译这个类时，它给了我这个错误消息：

错误CS0019：运算符 *'不能应用于
float'和`T'


我知道我为T提供的类型将支持与float相乘。如何在这种情况下实现泛乘？

解决方案

Ahhh，好'Haskell。



你不能在C＃中做到这一点，你应该有多个DoFoo，一个用于浮点数，一个用于双精度浮点数，另一个用于十进制浮点数。您也可以放弃浮动变体，因为它会隐式地转换为双精度。

I'm programming in Unity 3.4.2 on OS X using C#.

I have a class like the following:

class Foo<T>
{
    public T DoFoo(T bar)
    {
        float aFloatValue = 1.0f;
        // Do other stuff...
        return aFloatValue * bar;
    }
}

When Unity compiles this class, it gives me this error message:

error CS0019: Operator *' cannot be applied to operands of type float' and `T'

I know that the types I provide for T will support multiplication with float. How can I implement generic multiplication in this case?

解决方案

Ahhh, good ol' Haskell.

You can't do that in C#, you should have multiple DoFoo's, one for float, one for double and one for decimal - there aren't all that many float types. You can drop the float variant, too, as it will be implicitly cast into a double anyway.

这篇关于我如何乘以一个浮点数和一个泛型类型？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！