public void Visit(IdentifierExprParam identExprParam)
{
Item ident = Environment.GetItem(identExprParam.Value);
switch (ident)
{
case StrItem _:
Environment.PushToTheStack(identExprParam.Unary == false ? (ident as StrItem).Value
: throw new ExecutorException("Cannot apply unary operator on str"));
break;
case NumItem _:
Environment.PushToTheStack(identExprParam.Unary == true ? (ident as NumItem).Value * (-1)
: (ident as NumItem).Value);
break;
case TurtleItem _:
Environment.PushToTheStack(identExprParam.Unary == false ? ident
: throw new ExecutorException("Cannot apply unary operator on Turtle"));
break;
default:
throw new ExecutorException($"Expecting identifier of one of types: str, num or Turtle, got {ident}");
}
}
public void Visit(IdentifierExprParam identExprParam)
{
Console.Write(identExprParam.Unary ? $"-{identExprParam.Value}" : identExprParam.Value);
}
