progress

main.js

@@ -7,6 +7,7 @@ import { Type } from './type.js';
 
 class Context {
   constructor(mod) {
+    this.mod = mod;
     this.types = new DefaultMap(() => new Set()); // instance to type
     this.instances = new DefaultMap(() => new Set()); // type to instance
 
@@ -26,11 +27,18 @@ class Context {
           this.functionsTo  .getdefault(t.params[1], true).add(fn);
         }
       }
-    }    
+    }
+  }
+
+  addToCtx({i, t}) {
+    return new Context({l:[
+      ...this.mod.l,
+      {i, t},
+    ]})
   }
 }
 
-const ctx = new Context({l:[
+let ctx = new Context({l:[
   ...ModuleStd.l,
   ...ModulePoint.l,
 ]});
@@ -257,6 +265,8 @@ async function transform(i, t) {
 async function apply(i, fn, fnT) {
   const result = fn(i);
   const resultType = fnT.params[1];
+  // update context with newly produced value
+  ctx = ctx.addToCtx({i: result, t: resultType});
   const {strI: strResult, strT: strResultType} = prettyIT({i: result, t: resultType});
   console.log(`result = ${strResult} :: ${strResultType}`);
   return instanceOrTypeOrFnOptions({i: result, t: resultType});