public override void Execute(ICpu cpu)
{
string suffixName = cpu.PopStack().ToString().ToUpper();
object popValue = cpu.PopValueEncapsulated();
var specialValue = popValue as ISuffixed;
if (specialValue == null)
{
throw new Exception(string.Format("Values of type {0} cannot have suffixes", popValue.GetType()));
}
ISuffixResult result = specialValue.GetSuffix(suffixName);
// If the result is a suffix that is still in need of being invoked and hasn't resolved to a value yet:
if (result != null && !IsMethodCallAttempt && !result.HasValue)
{
// This is what happens when someone tries to call a suffix method as if
// it wasn't a method (i.e. leaving the parentheses off the call). The
// member returned is a delegate that needs to be called to get its actual
// value. Borrowing the same routine that OpcodeCall uses for its method calls:
cpu.PushStack(result);
cpu.PushStack(new KOSArgMarkerType());
OpcodeCall.StaticExecute(cpu, false, "", false); // this will push the return value on the stack for us.
}
else
{
if (result.HasValue)
{
// Push the already calculated value.
cpu.PushStack(result.Value);
}
else
{
// Push the indirect suffix delegate, but don't execute it yet
// because we need to put the upcoming arg list above it on the stack.
// Eventually an <indirect> OpcodeCall will occur further down the program which
// will actually execute this.
cpu.PushStack(result);
}
}
}
public override void Execute(ICpu cpu)
{
cpu.PushStack(cpu.PopValueEncapsulated());
}