export declare function aliasesFromPattern(query: string): Generator<string, void, undefined>;
/**
 * Defaults to defaultMatcher is no function is specified.
 *
 * @returnType Returns the matching function specified by an expression of the form
 * `['exact' | 'prefix' | 'levenshtein' ':']`
 */
export declare function matcherFromExpression(alias: string, defaultMatcher: string): string;
/**
 * @returnType the pattern portion of an expression of the form `['exact' | 'prefix'`
 * `| 'levenshtein' ':']`
 */
export declare function patternFromExpression(alias: string): string;