Use pass-through for unknown types

Author: surma

lib/asbind-instance/bind-function.js

@@ -73,7 +73,10 @@ function getConverterForType(typeName) {
       return converter;
     }
   }
-  throw Error(`No converter for ${JSON.stringify(typeName)}`);
+  console.warn(
+    `No converter for ${JSON.stringify(typeName)}, using pass-through`
+  );
+  return { ascToJs: nop, jsToAsc: nop };
 }
 
 function getAscToJsConverterForType(typeName) {

test/tests/unknown-type/asc.ts

@@ -0,0 +1,9 @@
+class X {
+  x: u32;
+  constructor(x: u32) {
+    this.x = x;
+  }
+}
+export function makeAThing(v: u32): X {
+  return new X(v);
+}

test/tests/unknown-type/test.js

@@ -0,0 +1,6 @@
+describe("as-bind", function() {
+  it("should handle unknown types gracefully", async function() {
+    const instance = await AsBind.instantiate(this.rawModule);
+    assert(typeof instance.exports.makeAThing(43) === "number");
+  });
+});