import type { Query, QueryNode } from '../query';
export type TagValue = string | number | boolean | Query | QueryNode | TagStarValue;
export declare enum TagSpecialValueType {
    star = 1200
}
export interface TagStarValue {
    t: TagSpecialValueType.star;
}
export declare class QueryTag {
    t: 'tag';
    attr: string;
    value: TagValue;
    isValueOptional: boolean;
    isAttrOptional: boolean;
    paramName: string;
    frozen: boolean;
    constructor(attr?: string, value?: TagValue);
    freeze(): void;
    hasValue(): boolean;
    hasStringValue(): boolean;
    isParameter(): boolean;
    isQuery(): boolean;
    isStar(): boolean;
    getQuery(): Query;
    getTaggedValue(): TagValue;
    getValue(): TagValue;
    getStringValue(): string;
    getNumberValue(): number;
    toQueryString(): string;
}