public AstBinaryWindowExpression(AstBinaryWindowOperator @operator, AstExpression arg1, AstExpression arg2, AstWindow window)
{
_operator = @operator;
_arg1 = Ensure.IsNotNull(arg1, nameof(arg1));
_arg2 = Ensure.IsNotNull(arg2, nameof(arg2));
_window = window;
}
public static string Render(this AstBinaryWindowOperator @operator)
{
return(@operator switch
{
AstBinaryWindowOperator.CovariancePopulation => "$covariancePop",
AstBinaryWindowOperator.CovarianceSample => "$covarianceSamp",
_ => throw new InvalidOperationException($"Unexpected binary window operator: {@operator}.")
});
public AstBinaryWindowExpression Update(AstBinaryWindowOperator @operator, AstExpression arg1, AstExpression arg2, AstWindow window)
{
if (@operator == _operator && arg1 == _arg1 && arg2 == _arg2 && window == _window)
{
return(this);
}
return(new AstBinaryWindowExpression(@operator, arg1, arg2, window));
}
