import ts from 'typescript';
import { Types } from '../../constants';
import { ScriptBuilder } from '../../sb';
import { VisitOptions } from '../../types';
import { Helper } from '../Helper';
export declare type PreferredType = 'default' | 'string' | 'number';
export interface ToPrimitiveHelperOptions {
    readonly type: ts.Type | undefined;
    readonly knownType?: Types;
    readonly preferredType?: PreferredType;
}
export declare class ToPrimitiveHelper extends Helper {
    private readonly type;
    private readonly knownType;
    private readonly preferredType;
    constructor({ type, knownType, preferredType }: ToPrimitiveHelperOptions);
    emit(sb: ScriptBuilder, node: ts.Node, optionsIn: VisitOptions): void;
}