Examples of ExpressionEvaluator that redefine existing operators | C# Online Compiler

Examples of ExpressionEvaluator that redefine existing operators by Coding Seb

/**********************************************************************************************
* This fiddle is a demo of the library : CodingSeb.ExpressionEvaluator
* See : https://github.com/codingseb/ExpressionEvaluator
* For Others examples : https://dotnetfiddle.net/Packages/41132/CodingSeb_ExpressionEvaluator
**********************************************************************************************/

using System;
using System.Collections.Generic;
using CodingSeb.ExpressionEvaluator;

public class XExpressionEvaluator : ExpressionEvaluator
{
    protected override void Init()
    {
        operatorsDictionary.Add("and", ExpressionOperator.ConditionalAnd);
        operatorsDictionary.Add("or", ExpressionOperator.ConditionalOr);
        operatorsDictionary.Remove("&&");
        operatorsDictionary.Remove("||");
    }
}

public class Program
{
	public static void Main()
	{
		ExpressionEvaluator evaluator = new XExpressionEvaluator();
		
		List<string> expressions = new List<string>()
		{
			"true and true",
			"true and false",
			"false and true",
			"false and false",
			"true && true",
			"true or true",
			"true or false",
			"false or true",
			"false or false",
			"true || true"
		};
		
		expressions.ForEach(expression => 
		{
			try
			{
				Console.WriteLine(expression);
				Console.WriteLine(evaluator.Evaluate(expression));
			}
			catch(Exception exception)
			{
				Console.WriteLine(exception);
			}
			finally
			{
				Console.WriteLine(string.Empty);	
			}
		});
	}
}

​x
 
/**********************************************************************************************
* This fiddle is a demo of the library : CodingSeb.ExpressionEvaluator
* See : https://github.com/codingseb/ExpressionEvaluator
* For Others examples : https://dotnetfiddle.net/Packages/41132/CodingSeb_ExpressionEvaluator
**********************************************************************************************/
​
using System;
using System.Collections.Generic;
using CodingSeb.ExpressionEvaluator;
​
public class XExpressionEvaluator : ExpressionEvaluator
{
    protected override void Init()
    {
        operatorsDictionary.Add("and", ExpressionOperator.ConditionalAnd);
        operatorsDictionary.Add("or", ExpressionOperator.ConditionalOr);
        operatorsDictionary.Remove("&&");
        operatorsDictionary.Remove("||");
    }
}
​
public class Program
{
    public static void Main()
    {
        ExpressionEvaluator evaluator = new XExpressionEvaluator();
        
        List<string> expressions = new List<string>()
        {
            "true and true",
            "true and false",
            "false and true",
            "false and false",
            "true && true",
            "true or true",
            "true or false",
            "false or true",
            "false or false",
            "true || true"
        };
        
        expressions.ForEach(expression => 
        {
            try
            {
                Console.WriteLine(expression);
                Console.WriteLine(evaluator.Evaluate(expression));
            }
            catch(Exception exception)
            {
                Console.WriteLine(exception);
            }
            finally
            {
                Console.WriteLine(string.Empty);    
            }
        });
    }
}

true and true
True

true and false
False

false and true
False

false and false
False

true && true
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Operator '&' cannot be applied to operands of type 'bool' and 'CodingSeb.ExpressionEvaluator.ExpressionOperator'
   at CallSite.Target(Closure , CallSite , Object , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute2[T0,T1,TRet](CallSite site, T0 arg0, T1 arg1)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.<>c.<.cctor>b__268_27(Object left, Object right)
   at CallSite.Target(Closure , CallSite , Func`3 , Object , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at CallSite.Target(Closure , CallSite , Func`3 , Object , Object )
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.<>c__DisplayClass249_0.<ProcessStack>b__1(IDictionary`2 operatorEvalutationsDict)
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.ProcessStack(Stack`1 stack)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.Evaluate(String expression)
   at Program.<>c__DisplayClass2.<Main>b__1(String expression) in c:\Windows\Temp\h235gbqi.0.cs:line 47

true or true
True

true or false
True

false or true
True

false or false
False

true || true
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Operator '|' cannot be applied to operands of type 'bool' and 'CodingSeb.ExpressionEvaluator.ExpressionOperator'
   at CallSite.Target(Closure , CallSite , Object , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute2[T0,T1,TRet](CallSite site, T0 arg0, T1 arg1)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.<>c.<.cctor>b__268_29(Object left, Object right)
   at CallSite.Target(Closure , CallSite , Func`3 , Object , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at CallSite.Target(Closure , CallSite , Func`3 , Object , Object )
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.<>c__DisplayClass249_0.<ProcessStack>b__1(IDictionary`2 operatorEvalutationsDict)
   at System.Collections.Generic.List`1.ForEach(Action`1 action)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.ProcessStack(Stack`1 stack)
   at CodingSeb.ExpressionEvaluator.ExpressionEvaluator.Evaluate(String expression)
   at Program.<>c__DisplayClass2.<Main>b__1(String expression) in c:\Windows\Temp\h235gbqi.0.cs:line 47

Cached Result
Last Run:	4:12:00 pm
Compile:	0.23s
Execute:	0.565s
Memory:	4.01Mb
CPU:	0.641s

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