C#动态运算符

Question

是否可以在c#中使用动态运算符？

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)

Answer 1

您无法创建动态运算符 - 但您可以将运算符包装在委托中.您可以使用lambdas来简化语法.

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();

虽然不确定 - 但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,可以编写动态评估表达式的代码.