import type { Matrix3x3 } from '../../math';
import type { XyzFrameSpec } from '../helpers';
import type { TrajectoryFrame } from '../index';
import type { ParsedTrajectory, WarnFn, WarningCollector } from './shared';
export declare function parse_extxyz_lattice(comment: string): Matrix3x3 | undefined;
export declare function parse_xyz_comment_metadata(comment: string): {
    step?: number;
    properties: Record<string, number>;
};
export declare function build_xyz_frame(text: string, frame: XyzFrameSpec, opts: {
    frame_label: string;
    default_step: number;
}, collector: WarningCollector): TrajectoryFrame;
export declare function index_xyz_frames(text: string, warn: WarnFn): XyzFrameSpec[];
export declare function parse_xyz_trajectory(content: string, collector: WarningCollector): ParsedTrajectory;