C＃动态运算符 [英] C# dynamic operator

问题描述

可以在c＃中有一个动态运算符吗？

Is it possible to have a dynamic operator in c#?

string aString = "5";
int a = 5;
int b = 6;
string op = "<";

//want to do something like dynamically without checking the value of op
if( a op b)

推荐答案

您不能创建动态运算符 - 但可以在代理中包装运算符。您可以使用lambdas来简化语法。

You can't create dynamic operators - but you can wrap an operator in a delegate. You can use lambdas to simplify the syntax.

Func<int,int,int> opPlus = (a,b) => a + b;
Func<int,int,int> opMinus = (a,b) => a - b;
// etc..

// now you can write:
int a = 5, b = 6;
Func<int,int,int> op = opPlus;
if( op(a,b) > 9 )
    DoSomething();

虽然这不是明确的 - C＃的未来发展方向是将编译器实现为服务。因此，在某些时候，可能会编写动态评估表达式的代码。

Although it's not definite - the future direction for C# is to implement the compiler as a service. So, at some point, it may be possible to write code that dynamically evaluates an expression.

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