export declare class Settings {
    static default: Settings;
    private knowns;
    private unary;
    private binary;
    get knownIdentifiers(): string[];
    get unaryOperators(): string[];
    get binaryOperators(): string[];
    addKnownValue(identifier: string, value: any): this;
    containsKnown(identifier: string): boolean;
    getKnownValue(identifier: string): any;
    addUnaryOperator(op: string, func: (value: any) => any): this;
    containsUnary(op: string): boolean;
    getUnaryOperator(op: string): (value: any) => any;
    addBinaryOperator(op: string, func: (left: any, right: any) => any, precedence?: number): this;
    containsBinary(op: string): boolean;
    getBinaryOperator(op: string): BinaryOperatorInfo;
}
export interface BinaryOperatorInfo {
    precedence: number;
    func: (left: any, right: () => any) => any;
}