import { RollupConfigPipe } from './types';
declare const _context: unique symbol;
export declare type StackFrame = RollupConfigPipe;
export interface IConfigContext {
    readonly cwd: string;
    readonly root: string;
    readonly stack: ReadonlyArray<StackFrame>;
    readonly [_context]: true;
}
export declare const createContext: () => IConfigContext;
declare type Diff<T extends string | number | symbol, U extends string | number | symbol> = ({
    [P in T]: P;
} & {
    [P in U]: never;
} & {
    [x: string]: never;
})[T];
declare type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
declare type Extension<TBase extends IConfigContext, TResult extends TBase> = Omit<TResult, keyof TBase> & Partial<TResult>;
export declare const createChildContext: <TBase extends IConfigContext, TResult extends TBase>(baseContext: TBase, modification: Extension<TBase, TResult>) => Readonly<TResult>;
export declare const isContext: (o: any) => o is IConfigContext;
export declare const withCwd: <T extends IConfigContext>(context: T, cwd: string) => T;
export declare const addStackFrame: <T extends IConfigContext>(context: T, frame: RollupConfigPipe) => T;
export {};