typia/src/programmers/helpers/AtomicPredicator.ts

Superfast runtime validators with only one line

import { Metadata } from "../../schemas/metadata/Metadata";

import { Atomic } from "../../typings/Atomic";

import { ArrayUtil } from "../../utils/ArrayUtil";

export namespace AtomicPredicator {
  export const constant =
    (meta: Metadata) =>
    (name: Atomic.Literal): boolean =>
      !ArrayUtil.has(meta.natives, (native) => native.toLowerCase() === name);

  export const atomic =
    (meta: Metadata) =>
    (name: Atomic.Literal): boolean =>
      !ArrayUtil.has(meta.natives, (native) => native.toLowerCase() === name);

  export const native = (name: string) => LIKE.has(name.toLowerCase());

  export const template = (meta: Metadata): boolean =>
    !ArrayUtil.has(meta.natives, (native) => native.toLowerCase() === "string");
}

const LIKE = new Set(["boolean", "bigint", "number", "string"]);