Practical: Creates a robust error handler that automatically defines variables on-the-fly when an 'Undefined Identifier' error occurs.

ID: 329

See: Code = [ErrorCode], Error = [ErrorInfo], Response = [ErrorHandlerResponse] 
				
					using uCalcSoftware;

var uc = new uCalc();

// This error handler allows you to use variables that were not
// explicitly defined previously by defining unrecognized identifiers
// as variables instead of returning an error.
static void AutoVariableDef(Handle_uCalc h) {
   var uc = new uCalc(h);
   if (uc.Error.Code == ErrorCode.Undefined_Identifier) {
      uc.DefineVariable(uc.Error.Symbol);
      uc.Error.Response = ErrorHandlerResponse.Resume;
   }
}


uc.Error.AddHandler(AutoVariableDef);
// The handler will automatically define 'AutoTest' on first use.
Console.WriteLine(uc.Eval("AutoTest = 123"));
Console.WriteLine(uc.Eval("AutoTest * 1000"));
				
			
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

// This error handler allows you to use variables that were not
// explicitly defined previously by defining unrecognized identifiers
// as variables instead of returning an error.
void ucalc_call AutoVariableDef(Handle_uCalc h) {
   auto uc = uCalc(h);
   if (uc.Error().Code() == ErrorCode::Undefined_Identifier) {
      uc.DefineVariable(uc.Error().Symbol());
      uc.Error().Response(ErrorHandlerResponse::Resume);
   }
}

int main() {
   uCalc uc;
   uc.Error().AddHandler(AutoVariableDef);
   // The handler will automatically define 'AutoTest' on first use.
   cout << uc.Eval("AutoTest = 123") << endl;
   cout << uc.Eval("AutoTest * 1000") << endl;
}
				
			
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					Imports System
Imports uCalcSoftware
Public Module Program
   
   '// This error handler allows you to use variables that were not
   '// explicitly defined previously by defining unrecognized identifiers
   '// as variables instead of returning an error.
   Public Sub AutoVariableDef(ByVal h As Handle_uCalc)
      Dim uc As New uCalc(h)
      If uc.Error.Code = ErrorCode.Undefined_Identifier Then
         uc.DefineVariable(uc.Error.Symbol)
         uc.Error.Response = ErrorHandlerResponse.Resume
      End If
   End Sub
   
   Public Sub Main()
      Dim uc As New uCalc()
      uc.Error.AddHandler(AddressOf AutoVariableDef)
      '// The handler will automatically define 'AutoTest' on first use.
      Console.WriteLine(uc.Eval("AutoTest = 123"))
      Console.WriteLine(uc.Eval("AutoTest * 1000"))
   End Sub
End Module
				
			
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