import { TValidator, TValidatorCallback, TParser } from './definitions';
/** A class that represents a series of conditions */
export declare class When {
    /** The validators */
    protected readonly _validators: TValidator[];
    /** The parsers */
    protected readonly _parsers: TParser[];
    /** The validator callback (when valid) */
    protected readonly _validCallbacks: TValidatorCallback[];
    /** The validator callback (when invalid) */
    protected readonly _invalidCallbacks: TValidatorCallback[];
    /** @param fns functions for When */
    constructor({ validate, parse, validCallback, invalidCallback }?: {
        validate?: TValidator[];
        parse?: TParser[];
        validCallback?: TValidatorCallback[];
        invalidCallback?: TValidatorCallback[];
    });
    /** Returns a new When instance based on this, with one more validator and/or parser */
    protected deriveFromType<T extends When>(derivation: {
        validate?: TValidator;
        parse?: TParser;
        validCallback?: TValidatorCallback;
        invalidCallback?: TValidatorCallback;
    }): T;
    /** Validate a context */
    validate(ctx: any, ...extraArgs: any[]): Promise<boolean>;
    /** Parse a context */
    parse(ctx: any, ...extraArgs: any[]): Promise<any>;
}