public string BuildFormula(bool useSpace = false)
{
if (!Operation.IsEmpty()) // если нет оператора то формула имеет вид x1 - всё ок
{
var v = useSpace ? " " : "";
if (Operation == ",")
{
Formula = Left.BuildFormula(useSpace) + v + "," + v + Right.BuildFormula(useSpace);
}
else if (Operation == "f")
{
Formula = Left.Formula + "(" + v + Right.BuildFormula(useSpace) + v + ")";
}
else
{
var lf = Left.BuildFormula(useSpace);
var rf = Right.BuildFormula(useSpace);
if (new[] { "<>", "<=", ">=", "!=", "<", ">", "=", "*", "/", "^" }.Contains(Operation))
{
if (Left.Operation == "-" || Left.Operation == "+")
{
lf = "(" + v + lf + v + ")";
}
if (Right.Operation == "-" || Right.Operation == "+" || (Operation == "/" && !Right.Operation.IsEmpty()))
{
rf = "(" + v + rf + v + ")";
}
}
if (new[] { "&&", "&", "||", "|" }.Contains(Operation))
{
if (new[] { "<>", "<=", ">=", "!=", "<", ">", "=" }.Contains(Left.Operation))
{
lf = "(" + v + lf + v + ")";
}
if (new[] { "<>", "<=", ">=", "!=", "<", ">", "=" }.Contains(Right.Operation))
{
rf = "(" + v + rf + v + ")";
}
}
Formula = lf + v + Operation + v + rf;
}
}
return(Formula);
}
