import { type ResolutionCtx } from '../../types.ts';
import type { FnExternals } from '../function/fnCore.ts';
/**
 * A key-value mapping where keys represent identifiers within shader code,
 * and values can either be another ExternalMap, or be any type that can be resolved to a code string.
 */
export type ExternalMap = Record<string, unknown>;
/**
 * Merges function externals into one map.
 */
export declare function mergeFunctionExternals(fnExternals: FnExternals): ExternalMap;
export declare function addArgTypesToExternals(implementation: string, argTypes: unknown[], core: {
    setExternals: (key: 'args', externals: ExternalMap) => void;
}): void;
export declare function addReturnTypeToExternals(implementation: string, returnType: unknown, core: {
    setExternals: (key: 'out', externals: ExternalMap) => void;
}): void;
export declare const anyIdent: RegExp;
export declare const boundedPropChain: RegExp;
/**
 * Replaces all occurrences of external names in WGSL code with their resolved values.
 * It adds all necessary definitions to the resolution context.
 * @param ctx - The resolution context.
 * @param externalMap - The external map. Assumes that keys don't contain dots.
 * @param wgsl - The WGSL code.
 *
 * @returns The WGSL code with all external names replaced with their resolved values.
 */
export declare function replaceExternalsInWgsl(ctx: ResolutionCtx, externalMap: ExternalMap, wgsl: string): string;