import { FilterNode } from '../types/nodes';
export declare enum Prefixes {
    Str_Escape = "%",
    Func_Escape = "$"
}
export declare function getIdentifier(prefix: Prefixes): string;
export declare function escapeStrings(expr: string): [string, Record<string, string>];
export declare function escapeFunctions(expr: string): [string, Record<string, string>];
export declare function replaceMathSymbols(mathExpr: string): string;
export declare function parseMathExpression(mathExpr: string): any;
export declare function cleanAST(ast: any): FilterNode;
export declare function processAST(ast: any): FilterNode;
export default function astPostProc(ast: any): FilterNode;