Rubberduck.Parsing.Preprocessing.NameExpression.Evaluate C# (CSharp) Method

        public override IValue Evaluate()
        {
            var identifier = _identifier.Evaluate().AsString;
            // Special case, identifier that does not exist is Empty.
            // Could add them to the symbol table, but since they are all constants
            // they never change anyway.
            if (!_symbolTable.HasSymbol(identifier))
            {
                return EmptyValue.Value;
            }
            return _symbolTable.Get(identifier);
        }
    }