public Form1()
{
InitializeComponent();
var grammar = new CustomDslGrammar();
_parser = new Parser(grammar);
}
static void Main(string[] args)
{
var grammar = new CustomDslGrammar();
var parser = new Parser(grammar);
var tree = parser.Parse("${Field.A} > 2 AND (NOT ${FieldB} < 3)");
var rootNode = (AstNode)tree.Root.AstNode;
var visitor = new CustomDslSqlVisitor();
visitor.Visit(rootNode);
Console.WriteLine(visitor.GetSqlExpression());
}