/** A role for a line that stands alone: a key or index whose value follows
 *  on the lines below it, one line of a multi-line string, or a bare value. */
export type FlatRole = "key" | "text" | "scalar" | "index";
export type StructuredLine = {
    indent: number;
    role: FlatRole;
    text: string;
}
/** A key with its value on the same line: `id: 1`. */
 | {
    indent: number;
    role: "pair";
    key: string;
    text: string;
}
/** A list whose items all have the same flat fields, as rows. */
 | {
    indent: number;
    role: "table";
    columns: string[];
    rows: string[][];
};
export declare function decodeStructured(text: string): unknown | undefined;
export declare function structuredLines(value: unknown): StructuredLine[];