import { assignFn } from "../generics/generics.js";

export const newDynamic = i => t => ({i, t});
export const getInst = lnk => lnk.i;
export const getType = lnk => lnk.t;

export const apply = input => fun => {
  const inputType = getType(input)
  const funType = getType(fun);
  const outputType = assignFn(funType, inputType);

  const inputValue = getInst(input);
  const funValue = getInst(fun);
  const outputValue = funValue(inputValue);

  return newDynamic(outputValue, outputType);
};