Setting default uCalc instance with uCalc.IsDefault(); also clearing all uCalc instances from default list

ID: 61

See: DefaultClear, DefaultInstance = [uCalc], IsDefault(bool), IsDefault = [bool] 
				
					using uCalcSoftware;

var uc = new uCalc();
uCalc.DefaultInstance.DefineVariable("val = 'original default'");
Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"));

uc.DefineVariable("val = 'uc'");
uc.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"));

var ucB = new uCalc();
ucB.DefineVariable("val = 'ucB'");
ucB.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"));

var ucC = new uCalc();
ucC.DefineVariable("val = 'ucC'");
ucC.IsDefault = true;
Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"));

uCalc.DefaultClear();

// The original unnamed default instance is reset so user variable val no longer exists
Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"));

// The other instances are removed from Default list but remain active
Console.WriteLine(uc.EvalStr("val"));
Console.WriteLine(ucB.EvalStr("val"));
Console.WriteLine(ucC.EvalStr("val"));
				
			
original default
uc
ucB
ucC
Undefined identifier
uc
ucB
ucC
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   uCalc::DefaultInstance().DefineVariable("val = 'original default'");
   cout << uCalc::DefaultInstance().EvalStr("val") << endl;

   uc.DefineVariable("val = 'uc'");
   uc.IsDefault(true);
   cout << uCalc::DefaultInstance().EvalStr("val") << endl;

   uCalc ucB;
   ucB.DefineVariable("val = 'ucB'");
   ucB.IsDefault(true);
   cout << uCalc::DefaultInstance().EvalStr("val") << endl;

   uCalc ucC;
   ucC.DefineVariable("val = 'ucC'");
   ucC.IsDefault(true);
   cout << uCalc::DefaultInstance().EvalStr("val") << endl;

   uCalc::DefaultClear();

   // The original unnamed default instance is reset so user variable val no longer exists
   cout << uCalc::DefaultInstance().EvalStr("val") << endl;

   // The other instances are removed from Default list but remain active
   cout << uc.EvalStr("val") << endl;
   cout << ucB.EvalStr("val") << endl;
   cout << ucC.EvalStr("val") << endl;
}
				
			
original default
uc
ucB
ucC
Undefined identifier
uc
ucB
ucC
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      uCalc.DefaultInstance.DefineVariable("val = 'original default'")
      Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"))
      
      uc.DefineVariable("val = 'uc'")
      uc.IsDefault = true
      Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"))
      
      Dim ucB As New uCalc()
      ucB.DefineVariable("val = 'ucB'")
      ucB.IsDefault = true
      Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"))
      
      Dim ucC As New uCalc()
      ucC.DefineVariable("val = 'ucC'")
      ucC.IsDefault = true
      Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"))
      
      uCalc.DefaultClear()
      
      '// The original unnamed default instance is reset so user variable val no longer exists
      Console.WriteLine(uCalc.DefaultInstance.EvalStr("val"))
      
      '// The other instances are removed from Default list but remain active
      Console.WriteLine(uc.EvalStr("val"))
      Console.WriteLine(ucB.EvalStr("val"))
      Console.WriteLine(ucC.EvalStr("val"))
   End Sub
End Module
				
			
original default
uc
ucB
ucC
Undefined identifier
uc
ucB
ucC
Explore 600+ other examples