import { typedFnType } from "../structures/types.js";
import { Top, Type } from "./types.js";
import { makeTypeConstructor } from "../type_constructor.js";

// A type-link, connecting a value to its Type.
export const symbolDynamic = Symbol('Dynamic');
export const Dynamic = makeTypeConstructor(symbolDynamic)(0);

export const getInst = lnk => lnk.i;
export const getType = lnk => lnk.t;

export const ModuleDynamic = {l:[
  {i: Dynamic, t: Type},
  {i: Top    , t: Type},

  ...typedFnType(getInst, fnType => fnType(() => Dynamic)(() => Top)),
  ...typedFnType(getType, fnType => fnType(() => Dynamic)(() => Top)),
]};