/**
 * S-Expression Parser for KiCad format
 * Parses KiCad symbol and footprint S-expressions for browser-side rendering
 */
export type SExpr = string | SExpr[];
/**
 * Parse S-expression string into nested structure
 */
export declare function parseSExpr(input: string): SExpr;
/**
 * Check if expression is a list
 */
export declare function isList(expr: SExpr): expr is SExpr[];
/**
 * Check if expression is an atom (string)
 */
export declare function isAtom(expr: SExpr): expr is string;
/**
 * Get the first element of a list (the tag/type)
 */
export declare function getTag(expr: SExpr): string | undefined;
/**
 * Find a child element by its tag name
 * Returns first match or undefined
 */
export declare function findChild(expr: SExpr, tag: string): SExpr[] | undefined;
/**
 * Find all child elements with a given tag
 */
export declare function findChildren(expr: SExpr, tag: string): SExpr[][];
/**
 * Get a simple attribute value: (tag value) -> value
 */
export declare function getAttr(expr: SExpr, tag: string): string | undefined;
/**
 * Get a numeric attribute value
 */
export declare function getNumericAttr(expr: SExpr, tag: string): number | undefined;
/**
 * Get a point from (tag x y) format
 */
export declare function getPoint(expr: SExpr, tag: string): {
    x: number;
    y: number;
} | undefined;
/**
 * Get point with optional rotation: (tag x y [rotation])
 */
export declare function getPointWithRotation(expr: SExpr, tag: string): {
    x: number;
    y: number;
    rotation?: number;
} | undefined;
/**
 * Get size from (size w h) format
 */
export declare function getSize(expr: SExpr): {
    width: number;
    height: number;
} | undefined;
/**
 * Get stroke properties from (stroke ...) element
 */
export declare function getStroke(expr: SExpr): {
    width: number;
    type: string;
} | undefined;
/**
 * Get fill type from (fill ...) element
 * Handles both (fill solid) and (fill (type solid)) formats
 */
export declare function getFillType(expr: SExpr): string | undefined;
/**
 * Get all XY points from (pts (xy x y) (xy x y) ...) structure
 */
export declare function getPoints(expr: SExpr): Array<{
    x: number;
    y: number;
}>;
/**
 * Get layers from (layers "Layer1" "Layer2" ...) or (layer "Layer")
 */
export declare function getLayers(expr: SExpr): string[];
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