/**
 * @packageDocumentation
 * Shared bounded-cache helpers with lightweight LRU semantics for hot-path
 * parser/type-analysis caches.
 */
/**
 * Result shape returned by bounded-cache lookups.
 */
export type BoundedCacheLookupResult<Value> = Readonly<{
    found: false;
}> | Readonly<{
    found: true;
    value: Value;
}>;
/**
 * Read a cache entry and mark it as most-recently-used.
 *
 * @param cache - Mutable cache map.
 * @param key - Entry key.
 *
 * @returns Lookup result describing whether an entry was found. When found,
 *   includes the cached value (which can itself be `undefined`/`null`).
 */
export declare const getBoundedCacheValue: <Key, Value>(cache: Map<Key, Value>, key: Key) => BoundedCacheLookupResult<Value>;
/**
 * Insert or update a cache entry and evict least-recently-used entries beyond
 * the configured max size.
 *
 * @param options - Bounded-cache insertion options.
 *
 *   - `cache`: Mutable cache map.
 *   - `key`: Entry key.
 *   - `maxEntries`: Maximum number of cache entries to retain.
 *   - `value`: Entry value.
 */
export declare const setBoundedCacheValue: <Key, Value>({ cache, key, maxEntries, value, }: Readonly<{
    cache: Map<Key, Value>;
    key: Key;
    maxEntries: number;
    value: Value;
}>) => void;
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