import { TerminalNode } from 'antlr4ts/tree/TerminalNode';
import { CommonTokenStream } from 'antlr4ts';
import { RuleNode } from 'antlr4ts/tree/RuleNode';
import { ParseTree } from 'antlr4ts/tree/ParseTree';
import { Splv2ParserType } from '@qn-pandora/app-sdk/es/spl';
import { Visitor } from './base';
export declare class FormatVisitor extends Visitor<string> {
    tokens: CommonTokenStream;
    constructor(tokens: CommonTokenStream);
    defaultResult(): string;
    private depth;
    visitTerminal: (node: TerminalNode) => string;
    visitChildren: (node: RuleNode, filter?: ((child: ParseTree) => boolean) | undefined) => string;
    visitOperators: (ctx: Splv2ParserType.OperatorsContext) => string;
    visitSub_clause: (ctx: Splv2ParserType.Sub_clauseContext) => string;
}