package org.simantics.spreadsheet.solver.formula;

import org.simantics.spreadsheet.solver.formula.parser.ast.AstArgList;

public class IfErrorFormulaFunction implements CellFormulaFunction<Object> {

    @Override
    public Object evaluate(CellValueVisitor visitor, AstArgList args) {

        if (args.values.size() != 2) throw new IllegalStateException();

        Object condition = args.values.get(0).accept(visitor);
        FormulaError2 error = FormulaError2.forObject(condition);
        if(error!=null) return error.getString();
        else return condition;
    }
}