import { CommonTokenStream } from 'antlr4ts';
import { TerminalNode } from 'antlr4ts/tree/TerminalNode';
import { RuleNode } from 'antlr4ts/tree/RuleNode';
import { ParseTree } from 'antlr4ts/tree/ParseTree';
import { Splv1ParserType } from '@qn-pandora/app-sdk/es/spl';
import { Visitor } from '../base/Visitor';
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: Splv1ParserType.OperatorsContext) => string;
    visitEval_parenthesized_expression: (ctx: Splv1ParserType.Eval_parenthesized_expressionContext) => string;
    visitSearch_parenthesized_expression: (ctx: Splv1ParserType.Search_parenthesized_expressionContext) => string;
    visitJoin: (ctx: Splv1ParserType.JoinContext) => string;
    visitAppend: (ctx: Splv1ParserType.AppendContext) => string;
    visitFrom: (ctx: Splv1ParserType.FromContext) => string;
}