package org.simantics.spreadsheet.graph.formula;

import org.simantics.spreadsheet.graph.CellFormulaFunction;
import org.simantics.spreadsheet.graph.CellValueVisitor;
import org.simantics.spreadsheet.graph.parser.ast.AstArgList;

public class IsErrorFormulaFunction implements CellFormulaFunction<Object>{

	@Override
    public Object evaluate(CellValueVisitor visitor, AstArgList args) {
		
        if (args.values.size() != 1) throw new IllegalStateException();
        
        Object condition = args.values.get(0).accept(visitor);
        if(condition instanceof String){
        	FormulaError2 error = FormulaError2.forString((String)condition);
        	return (error!=null);
        }
        return false;
    }
}