/**
 * BSP layout DSL parser and serializer.
 *
 * Syntax:
 *   layout  = node
 *   node    = split | leaf
 *   split   = ("line" | "col" | "tabs") "(" entries ")"
 *   entries = entry ("," entry)*
 *   entry   = [label ":"] node [weight] ["=" command] ["@" fontSize]
 *   label   = identifier | quoted-string
 *   leaf    = identifier | quoted-string
 *   command = identifier | quoted-string
 *   weight  = number
 *   fontSize = number ["px" | "pt" | "%"]
 *   identifier = [a-zA-Z_][a-zA-Z0-9_-]*
 *
 * Examples:
 *   shell
 *   line(chat 2, col(shell, tail, htop))
 *   line(editor 3 @14, col(shell @11, logs))
 *   tabs(shell, htop, logs)
 *   tabs("Editor": col(a, b), "Terminal": col(c, d))
 *   line(editor 2, tabs(shell, logs))
 *   col(htop="htop", shell="cd /src && make watch")
 */
export type BSPNode = BSPSplit | BSPLeaf;
export interface BSPSplit {
    type: "split";
    direction: "horizontal" | "vertical" | "tabs";
    children: BSPChild[];
}
export interface BSPChild {
    node: BSPNode;
    weight: number;
    label?: string;
}
export interface BSPLeaf {
    type: "leaf";
    tag: string;
    /** Shell command to run when the pane is created. */
    command?: string;
    /** Raw font size, e.g. 14, "12px", "13pt", "80%" */
    fontSize?: number | string;
}
export declare class DSLParseError extends Error {
    readonly offset: number;
    constructor(message: string, offset: number);
}
export declare function parseDSL(input: string): {
    root: BSPNode;
    weight: number;
};
export declare function serializeDSL(root: BSPNode, weight?: number): string;
export declare function collectTags(node: BSPNode): string[];
export declare function leafCount(node: BSPNode): number;
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