import { ComponentValueModel } from '../models';
import * as i0 from "@angular/core";
export declare class FormulaCalculateService {
    private readonly _operatorPrecedence;
    private readonly _operators;
    calculateMathExpression(expression: string, values: ComponentValueModel[]): number;
    calculateStringConcatenation(expression: string, values: ComponentValueModel[]): string;
    private _calculateMathExpression;
    private _addFunctionResult;
    private _addOperator;
    private _calculateAll;
    private _getOperatorPrecedence;
    private _getExpressionBetweenParentheses;
    private _getNumberValue;
    private _calculate;
    private _isOperator;
    static ɵfac: i0.ɵɵFactoryDeclaration<FormulaCalculateService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FormulaCalculateService>;
}