Defining a new custom operator with a precedence level set relative to an existing operator.

ID: 656

See: Precedence = [int] 
				
					using uCalcSoftware;

var uc = new uCalc();
// Goal: Define a new power operator '**' with higher precedence than multiplication '*'.
var mul_precedence = uc.ItemOf("*", uCalc.Properties(ItemIs.Infix)).Precedence;

// Set the new operator's precedence to be higher than multiplication.
uc.DefineOperator("{base} ** {exp} = Pow(base, exp)", mul_precedence + 10);

// The new operator should be evaluated before multiplication and addition.
// The expression is equivalent to: 2 + (3 * (2 ** 3)) -> 2 + (3 * 8) -> 2 + 24 -> 26
Console.WriteLine(uc.Eval("2 + 3 * 2 ** 3"));
				
			
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // Goal: Define a new power operator '**' with higher precedence than multiplication '*'.
   auto mul_precedence = uc.ItemOf("*", uCalc::Properties(ItemIs::Infix)).Precedence();

   // Set the new operator's precedence to be higher than multiplication.
   uc.DefineOperator("{base} ** {exp} = Pow(base, exp)", mul_precedence + 10);

   // The new operator should be evaluated before multiplication and addition.
   // The expression is equivalent to: 2 + (3 * (2 ** 3)) -> 2 + (3 * 8) -> 2 + 24 -> 26
   cout << uc.Eval("2 + 3 * 2 ** 3") << endl;
}
				
			
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// Goal: Define a new power operator '**' with higher precedence than multiplication '*'.
      Dim mul_precedence = uc.ItemOf("*", uCalc.Properties(ItemIs.Infix)).Precedence
      
      '// Set the new operator's precedence to be higher than multiplication.
      uc.DefineOperator("{base} ** {exp} = Pow(base, exp)", mul_precedence + 10)
      
      '// The new operator should be evaluated before multiplication and addition.
      '// The expression is equivalent to: 2 + (3 * (2 ** 3)) -> 2 + (3 * 8) -> 2 + 24 -> 26
      Console.WriteLine(uc.Eval("2 + 3 * 2 ** 3"))
   End Sub
End Module
				
			
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