protected internal override void Sub(CalculatorContext context, Stack <string> stack)
{
Calculator ctxt = context.Owner;
if (stack.Count >= 2)
{
CalculatorState endState = context.State;
context.ClearState();
try
{
ctxt.Sub();
}
finally
{
context.State = endState;
}
}
else
{
context.State.Exit(context);
context.State = Map1.ErrorTuple;
context.State.Entry(context);
}
return;
}
protected internal override void Enter(CalculatorContext context, string value)
{
Calculator ctxt = context.Owner;
if (double.TryParse(value, out double _))
{
context.State.Exit(context);
context.ClearState();
try
{
ctxt.Push(value);
}
finally
{
context.State = Map1.Calculate;
context.State.Entry(context);
}
}
else
{
context.State.Exit(context);
context.State = Map1.ErrorNumeric;
context.State.Entry(context);
}
return;
}
protected internal override void ClrAll(CalculatorContext context, Stack <string> stack)
{
Calculator ctxt = context.Owner;
CalculatorState endState = context.State;
context.ClearState();
try
{
ctxt.ClrAll();
}
finally
{
context.State = endState;
}
return;
}