protected Rule()
{
_builder = new RuleBuilder();
_lhsExpression = new LeftHandSideExpression(_builder);
_rhsExpression = new RightHandSideExpression(_builder);
_definition = new Lazy <IRuleDefinition>(BuildDefinition);
}
/// <summary>
/// Returns expression builder for rule's right-hand side (actions).
/// </summary>
/// <returns>Right hand side expression builder.</returns>
protected IRightHandSideExpression Then()
{
var builder = _builder.RightHandSide();
var expression = new RightHandSideExpression(builder, _symbolStack);
return(expression);
}