fp-ts-std/dist/types/Show.d.ts

The missing pseudo-standard library for fp-ts.

/**
 * Utilities to accommodate `fp-ts/Show`.
 *
 * @since 0.12.0
 */
import type { Contravariant1 } from "fp-ts/Contravariant";
import type { Show } from "fp-ts/Show";
/**
 * Typeclass machinery.
 *
 * @category 4 Minutiae
 * @since 0.12.0
 */
export declare const URI = "Show";
/**
 * Typeclass machinery.
 *
 * @category 4 Minutiae
 * @since 0.12.0
 */
export type URI = typeof URI;
declare module "fp-ts/HKT" {
    interface URItoKind<A> {
        readonly [URI]: Show<A>;
    }
}
/**
 * Derive an instance for `Show<B>` by providing a function from `B` to `A` and
 * a `Show<A>` instance.
 *
 * @example
 * import { Show } from 'fp-ts/Show'
 * import * as Str from 'fp-ts/string'
 * import { contramap } from 'fp-ts-std/Show'
 *
 * const showNum: Show<number> = contramap(String)(Str.Show)
 *
 * assert.strictEqual(showNum.show(123), '"123"')
 *
 * @category 2 Typeclass Methods
 * @since 0.12.0
 */
export declare const contramap: <B, A>(f: (b: B) => A) => (m: Show<A>) => Show<B>;
/**
 * Formal `Contravariant` instance for `Show` to be provided to higher-kinded
 * functions that require it.
 *
 * @category 1 Typeclass Instances
 * @since 0.12.0
 */
export declare const Contravariant: Contravariant1<URI>;
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