traits.ts
48 lines
| 1.7 KiB
| video/mp2t
|
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r1 | import { FluentConfiguration } from "./FluentConfiguration"; | |
| import { IDestroyable } from "./interfaces"; | |||
| export function fluent<S extends object = object>() { | |||
| return new FluentConfiguration<S>(); | |||
| } | |||
| export type key = string | number | symbol; | |||
| export const isKey = (v: unknown): v is key => | |||
| typeof v === "string" || typeof v === "number" || typeof v === "symbol"; | |||
| export const isString = (v: unknown): v is string => | |||
| typeof v === "string"; | |||
| export const isNotNull = <T>(v: T): v is NonNullable<T> => v !== null && v !== undefined; | |||
| export const each = <T extends object>(obj: T, cb: <X extends Extract<keyof T, string>>(v: NonNullable<T[X]>, k: X) => void) => | |||
| (Object.keys(obj) as (Extract<keyof T, string>)[]) | |||
| .forEach(k => { | |||
| const v = obj[k]; | |||
| isNotNull(v) && cb(v, k); | |||
| }); | |||
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r0 | ||
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r1 | export const argumentNotNull = (arg: unknown, name: string) => { | |
| if (arg === null || arg === undefined) | |||
| throw new Error("The argument " + name + " can't be null or undefined"); | |||
| }; | |||
| export const isPromise = <T = unknown>(val: unknown): val is PromiseLike<T> => | |||
| isNotNull(val) && typeof (val as PromiseLike<T>).then === "function"; | |||
| export const isDestroyable = (d: unknown): d is IDestroyable => | |||
| isNotNull(d) && typeof (d as IDestroyable).destroy === "function"; | |||
| let _nextOid = 0; | |||
| const _oid = typeof Symbol === "function" ? | |||
| Symbol.for("__implab__oid__") : | |||
| "__implab__oid__"; | |||
| type OidSlot = { [k in typeof _oid]?: string }; | |||
| export const oid = <T extends object>(instance: T): string => { | |||
| argumentNotNull(instance, "instance"); | |||
| const val = (instance as OidSlot)[_oid]; | |||
| return val ? val : ((instance as OidSlot)[_oid] = `oid_${++_nextOid}`); | |||
| }; |