wip3

examples/builtin_example.go.txt

@@ -1,9 +1,14 @@
 // Example: How to add builtins to the framework
 // Just write a Go function and register it - that's all!
 
-package main
+package standard
 
-import "fmt"
+import (
+	"fmt"
+
+	"github.com/dop251/goja"
+	"reichard.io/poiesis/internal/runtime/pkg/builtin"
+)
 
 // Simple function - just register it!
 func multiply(a, b int) int {
@@ -33,14 +38,25 @@ func getUser(id int) (User, error) {
 	}, nil
 }
 
-// Register all builtins in init
+// Optional: Register custom converter for User type
+func convertUser(vm *goja.Runtime, user User) goja.Value {
+	obj := vm.NewObject()
+	_ = obj.Set("name", user.Name)
+	_ = obj.Set("email", user.Email)
+	_ = obj.Set("age", user.Age)
+	return obj
+}
+
+// In a real file, you'd put this in init():
+//
 // func init() {
-// 	RegisterBuiltin("multiply", multiply)
-// 	RegisterBuiltin("divide", divide)
-// 	RegisterBuiltin("getUser", getUser)
+// 	builtin.RegisterCustomConverter(convertUser)
+// 	builtin.RegisterBuiltin("multiply", multiply)
+// 	builtin.RegisterBuiltin("divide", divide)
+// 	builtin.RegisterBuiltin("getUser", getUser)
 // }
 
 // That's it! TypeScript definitions are auto-generated:
 // declare function multiply(arg0: number, arg1: number): number;
 // declare function divide(arg0: number, arg1: number): number;
-// declare function getUser(arg0: number): any;
+// declare function getUser(arg0: number): User;