import { Code } from './ast/types';
/** Generate an integer series from 0 to `count` (non-inclusive). */
export declare const countTo: (count: number) => number[];
/**
 * @returns Generates a new object with the same keys as `src` and whose
 * values are the result of mapping `src`'s values with `func`.
 *
 * @todo : fix typings so that keys of SrcType appear in DestType.
 */
export declare const mapObject: <SrcType, DestType>(src: {
    [key: string]: SrcType;
}, func: (value: SrcType, key: string, index: number) => DestType) => {
    [key: string]: DestType;
};
/**
 * @param func Called for each element in `src`. Returns a pair `[<key>, <value>]`.
 * @returns A new object whoses keys and values are the result of
 * applying `func` to each element in `src`.
 */
export declare const mapArray: <SrcType, DestType>(src: readonly SrcType[], func: (srcValue: SrcType, index: number) => [string, DestType]) => {
    [key: string]: DestType;
};
/**
 * Renders one of several alternative bits of code.
 *
 * @param routes A list of alternatives `[<test>, <code>]`
 * @returns The first `code` whose `test` evaluated to true.
 */
export declare const renderSwitch: (...routes: Array<[boolean, Code | Array<Code>]>) => string | string[];