fix some things

lib/primitives/dynamic.js

@@ -1,3 +1,17 @@
+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);
+};