/**
 * `Intl.Collator`-backed case/diacritics-insensitive filter used by the
 * combobox for client-side item filtering. Port of the runtime logic in
 * `packages/react/src/internals/filter.ts` + the `createCollatorItemFilter`
 * / `createSingleSelectionCollatorFilter` helpers from
 * `packages/react/src/combobox/root/utils/index.ts`. No framework-specific
 * shape — the React hook (`useCoreFilter`) collapses to a plain factory in
 * Solid since `getFilter` itself is already memoised via a module-level
 * cache.
 */
export interface Filter {
    contains: <Item>(item: Item, query: string, itemToString?: (item: Item) => string) => boolean;
    startsWith: <Item>(item: Item, query: string, itemToString?: (item: Item) => string) => boolean;
    endsWith: <Item>(item: Item, query: string, itemToString?: (item: Item) => string) => boolean;
}
export interface GetFilterParameters extends Intl.CollatorOptions {
    locale?: Intl.LocalesArgument | undefined;
}
export declare function getFilter(options?: GetFilterParameters): Filter;
/**
 * Case-insensitive "item contains query" filter — matches the React
 * `createCollatorItemFilter` helper.
 */
export declare function createCollatorItemFilter(collatorFilter: Filter, itemToStringLabel?: (item: unknown) => string): (item: unknown, query: string) => boolean;
/**
 * Single-select filter that shows all items when the query is empty or
 * matches the current selection. Mirrors React's
 * `createSingleSelectionCollatorFilter`.
 */
export declare function createSingleSelectionCollatorFilter(collatorFilter: Filter, itemToStringLabel?: (item: unknown) => string, selectedValue?: unknown): (item: unknown, query: string) => boolean;
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