private static Expression SimplifyFunction(Function node)
{
bool @const = true;
for (int i = 0; i < node.Arguments.Count; i++)
{
node.Arguments[i] = Simplify(node.Arguments[i]);
if (node.Arguments[i].Type != ExpressionType.Float)
{
@const = false;
}
}
if (!@const)
{
return(node);
}
double value;
FunctionEntry entry = node.Entry;
List <Operand> operands = new List <Operand>();
for (int i = 0; i < node.Arguments.Count; i++)
{
operands.Add(new Operand(((Float)node.Arguments[i]).Value));
}
value = entry.Exec(operands).value;
return(new Float {
Value = value
});
}
public void Exec(Stack <Operand> operands)
{
//if you push 1, 2, 3, 4, 5 then ToList will give you 5, 4, 3, 2, 1
Stack <Operand> arguments = new Stack <Operand>();
for (int i = 0; i < func.ArgNumber; i++)
{
arguments.Push(operands.Pop());
}
List <Operand> list = arguments.ToList <Operand>();
operands.Push(func.Exec(list));
}