Question

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)

Answer 1

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();

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.