Raises an error with a dynamic message if a validation check fails within a callback.

ID: 483

See: Error = [ErrorInfo], Error handling and control flow, Raise(string) 
				
					using uCalcSoftware;

var uc = new uCalc();

static void ValidateValue(uCalc.Callback cb) {
   var val = cb.Arg(1);
   if (val > 100) {
      // The error message includes the problematic value, making it dynamic.
      cb.Error.Raise("Value exceeds maximum of 100. Got: " + val.ToString());
   } else {
      cb.Return(val);
   }
}

uc.DefineFunction("CheckValue(val)", ValidateValue);
Console.WriteLine(uc.EvalStr("CheckValue(50)"));
Console.WriteLine(uc.EvalStr("CheckValue(123)"));
				
			
50
Value exceeds maximum of 100. Got: 123
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

void ucalc_call ValidateValue(uCalcBase::Callback cb) {
   auto val = cb.Arg(1);
   if (val > 100) {
      // The error message includes the problematic value, making it dynamic.
      cb.Error().Raise("Value exceeds maximum of 100. Got: " + to_string((int)val));
   } else {
      cb.Return(val);
   }
}
int main() {
   uCalc uc;
   uc.DefineFunction("CheckValue(val)", ValidateValue);
   cout << uc.EvalStr("CheckValue(50)") << endl;
   cout << uc.EvalStr("CheckValue(123)") << endl;
}
				
			
50
Value exceeds maximum of 100. Got: 123
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   
   Public Sub ValidateValue(ByVal cb As uCalc.Callback)
      Dim val = cb.Arg(1)
      If val > 100 Then
         '// The error message includes the problematic value, making it dynamic.
         cb.Error.Raise("Value exceeds maximum of 100. Got: " + val.ToString())
      Else
         cb.Return(val)
      End If
   End Sub
   Public Sub Main()
      Dim uc As New uCalc()
      uc.DefineFunction("CheckValue(val)", AddressOf ValidateValue)
      Console.WriteLine(uc.EvalStr("CheckValue(50)"))
      Console.WriteLine(uc.EvalStr("CheckValue(123)"))
   End Sub
End Module
				
			
50
Value exceeds maximum of 100. Got: 123
Explore 600+ other examples