/**
 * GPT-Vis Syntax Parser
 *
 * Parses a markdown-like syntax for visualization configurations.
 *
 * Syntax rules:
 * - `vis [chartType]` - Defines the chart type (required first line)
 * - `data` - Starts a data array section
 * - `  - key value` - Array item with key-value pairs
 * - `  - value` - Simple array item (for flat arrays like histogram data)
 * - `  - "value with spaces"` - Quoted string item; single or double quotes both supported.
 *                               Quotes are required when the value contains spaces; optional otherwise.
 *                               Quoted values are never coerced to numbers or booleans.
 * - `key: value` or `key value` - Top-level key-value pair
 * - `style` - Starts a style object section
 * - `palette` inside `style` uses array syntax with dash-prefixed items
 * - `children` - Nested array for hierarchical data (mind-map, treemap, etc.)
 *
 * @example
 * ```
 * vis pie
 * data
 *   - category 分类一
 *     value 27
 *   - category 分类二
 *     value 25
 * innerRadius: 0.6
 * style
 *   backgroundColor #333
 *   palette
 *     - #ff5a5f
 *     - #1fb6ff
 *     - #13ce66
 * ```
 *
 * @example Simple array (histogram)
 * ```
 * vis histogram
 * data
 *   - 78
 *   - 88
 *   - 60
 * binNumber 5
 * ```
 *
 * @example Quoted string values (values containing spaces)
 * ```
 * vis dual-axes
 * categories
 *   - "North America"
 *   - '东南 亚'
 *   - 欧洲
 * ```
 *
 * @example Hierarchical data (mind-map)
 * ```
 * vis mind-map
 * data
 *   - name 项目计划
 *     children
 *       - name 研究阶段
 *         children
 *           - name 市场调研
 *           - name 技术可行性分析
 *       - name 开发阶段
 * ```
 */
/**
 * Parsed chart configuration result
 */
export interface ParsedConfig {
    type: string;
    [key: string]: unknown;
}
/**
 * Parse the visualization syntax string into a configuration object
 */
export declare function parse(syntax: string): ParsedConfig;
/**
 * Check if a val is a valid visualization syntax
 */
export declare function isVisSyntax(input: any): boolean;