import type { SExpr } from '../sexpr/types.js';
/**
 * Layer utility functions for PCB operations
 */
/**
 * Maps layer names to the appropriate side (front/back) of the PCB
 * @param layerName - The layer name to map (e.g., "F.Cu", "B.SilkS")
 * @param targetSide - Target side: 'front', 'back', or undefined (defaults to front)
 * @returns Mapped layer name
 */
export declare function mapLayerToSide(layerName: string, targetSide: 'front' | 'back' | undefined): string;
/**
 * Transforms S-expression layer references to match target side
 * @param sexpr - S-expression array to transform
 * @param targetSide - Target side: 'front', 'back', or undefined (defaults to front)
 * @returns Transformed S-expression
 */
export declare function transformSexprLayers(sexpr: SExpr, targetSide: 'front' | 'back' | undefined): SExpr;
/**
 * Mirrors chamfer direction for back-side components
 * @param chamferDirection - Original chamfer direction
 * @returns Mirrored chamfer direction
 */
export declare function mirrorChamferDirection(chamferDirection: string): string;
//# sourceMappingURL=pcb_layer_utils.d.ts.map