import { Schema } from '../core/schema';
import { Context } from '../types/SchemaTypes';
import { ValidationContext } from './BaseRule';
import { RuleBooleanMethod } from './Rule';
export type WhenConfig<T, Input, Final = Input> = {
    /**
     * When "is" returns true "then", when false "otherwise"
     */
    is: RuleBooleanMethod<Input, Final>;
    then: (schema: T) => T;
    otherwise?: (schema: T) => T;
};
export type WhenParameter<Value = any, T = any> = {
    method: RuleBooleanMethod<Value, T>;
    then: Schema<any, any>;
    /**
     * Makes when named, so uses a key from parent
     */
    namedValueKey?: string;
    otherwise?: Schema<any, any>;
};
export declare function getWhenRule<Value = any, T = any>(config: WhenParameter<Value, T>, context: Context): (value: any, validationContext: ValidationContext<any>) => void;