import { NDArray, DataValue, LazyLoader, LazyIndexRange } from '../types.js';
export type DataBlockKind = 'eager' | 'lazy';
interface BaseDataBlock {
    readonly kind: DataBlockKind;
    readonly shape: number[];
    materialize(): NDArray;
    getValue(indices: number[]): DataValue;
    clone(): DataBlock;
}
export interface EagerDataBlock extends BaseDataBlock {
    kind: 'eager';
}
export interface LazyDataBlock extends BaseDataBlock {
    kind: 'lazy';
    fetch(ranges: Record<string, LazyIndexRange>): Promise<NDArray>;
}
export type DataBlock = EagerDataBlock | LazyDataBlock;
export declare function createEagerBlock(data: NDArray): EagerDataBlock;
export declare function createLazyBlock(shape: number[], loader: LazyLoader): LazyDataBlock;
export declare function isLazyBlock(block: DataBlock): block is LazyDataBlock;
export {};
//# sourceMappingURL=data-block.d.ts.map