/**
 * Accessor cache (spec: Phase 2 "Accessor cache (memoize by source string)").
 * Same string (+ shape + bound param) always returns the same compiled
 * reference — this is the reference-stability half of the reconciliation
 * story (see "Memoize-by-source" in Layer Reconciliation); the correctness
 * half (`updateTriggers` fingerprinting) is the reconciler's job (see
 * runtime-core.ts / LayerIR.updateTriggers), not this module's — but this
 * module's key format IS the fingerprint value, so the same string serves
 * both purposes.
 *
 * Eviction (Q4: mark-and-sweep against the reconciler's live accessor set)
 * is implemented here as `sweep()`, but this cache still doesn't know what's
 * live on its own — the caller (parse-manifest.ts, once per full reconcile,
 * across all layers) collects the live key set via `cacheKey()` and passes
 * it in.
 */
import { type CompileOptions, type CompiledExpression } from "./compile";
/** The cache key — also used directly as the deck.gl `updateTrigger` fingerprint. */
export declare function cacheKey(source: string, opts: CompileOptions): string;
export declare class AccessorCache {
    #private;
    compile(source: string, opts: CompileOptions): CompiledExpression;
    keys(): IterableIterator<string>;
    delete(key: string): boolean;
    /** Drop every cached entry whose key is not in `liveKeys` (mark-and-sweep, Q4). */
    sweep(liveKeys: ReadonlySet<string>): void;
    get size(): number;
}