typia/src/programmers/helpers/disable_function_importer_declare.ts

Superfast runtime validators with only one line

import ts from "typescript";

import { FunctionImporter } from "./FunctionImporter";

export const disable_function_importer_declare = (
  importer: FunctionImporter,
): FunctionImporter => disable(importer) as FunctionImporter;

const disable = (importer: FunctionImporter): MethodOnly<FunctionImporter> => ({
  method: importer.method,
  empty: (): boolean => importer.empty(),
  use: (name: string): ts.Identifier => importer.use(name),
  useLocal: (name: string): string => importer.useLocal(name),
  hasLocal: (name: string): boolean => importer.hasLocal(name),
  declare: (_modulo: ts.LeftHandSideExpression): ts.Statement[] => [],
  declareUnions: (): ts.Statement[] => [],
  increment: (): number => importer.increment(),
  emplaceUnion: (
    prefix: string,
    name: string,
    factory: () => ts.ArrowFunction,
  ): string => importer.emplaceUnion(prefix, name, factory),
  emplaceVariable: (key, value) => importer.emplaceVariable(key, value),
  trace: (): void => importer.trace(),
});

type MethodOnly<T> = {
  [P in keyof T]: T[P] extends Function
    ? T[P]
    : P extends "method"
      ? T[P]
      : never;
};