Julien Valverdé
43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
import { type Equivalence, Function, Predicate } from "effect"
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import type * as Component from "./Component.js"
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export const TypeId: unique symbol = Symbol.for("effect-fc/Memoized")
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export type TypeId = typeof TypeId
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export interface Memoized<P> extends Memoized.Options<P> {
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readonly [TypeId]: true
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}
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export namespace Memoized {
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export interface Options<P> {
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readonly propsAreEqual?: Equivalence.Equivalence<P>
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}
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}
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export const isMemoized = (u: unknown): u is Memoized<any> => Predicate.hasProperty(u, TypeId)
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export const memo = <T extends Component.Component<any, any, any>>(
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self: T
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): T & Memoized<Component.Component.Props<T>> => Object.setPrototypeOf(
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{ ...self, [TypeId]: true },
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Object.getPrototypeOf(self),
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)
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export const withOptions: {
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<T extends Component.Component<any, any, any> & Memoized<any>>(
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options: Partial<Memoized.Options<Component.Component.Props<T>>>
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): (self: T) => T
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<T extends Component.Component<any, any, any> & Memoized<any>>(
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self: T,
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options: Partial<Memoized.Options<Component.Component.Props<T>>>,
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): T
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} = Function.dual(2, <T extends Component.Component<any, any, any> & Memoized<any>>(
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self: T,
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options: Partial<Memoized.Options<Component.Component.Props<T>>>,
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): T => Object.setPrototypeOf(
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{ ...self, ...options },
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Object.getPrototypeOf(self),
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))
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