import { InstrAtomContext, ReplaceAtomContext, SubstrAtomContext, UnaryStringFunctionContext, Visitor as VtlVisitor } from "@making-sense/vtl-2-1-antlr-tools-ts";
import { VisitorResult, Bindings } from "../../model";
import ExpressionVisitor from "../Expression";
declare class StringVisitor extends VtlVisitor<VisitorResult> {
    exprVisitor: ExpressionVisitor;
    constructor(exprVisitor: ExpressionVisitor);
    visitUnaryStringFunction: (ctx: UnaryStringFunctionContext) => {
        resolve: (bindings: Bindings) => string | number | null;
        type: number;
    };
    checkTypes: (exprCtx: any, expectedTypes: number | number[]) => VisitorResult;
    visitReplaceAtom: (ctx: ReplaceAtomContext) => {
        resolve: (bindings: Bindings) => any;
        type: number;
    };
    visitInstrAtom: (ctx: InstrAtomContext) => {
        resolve: (bindings: Bindings) => number | null;
        type: number;
    };
    visitSubstrAtom: (ctx: SubstrAtomContext) => {
        resolve: (bindings: Bindings) => any;
        type: number;
    };
}
export default StringVisitor;