From e4bde3d896f41aace6a6c4295afea85a0c404ba5 Mon Sep 17 00:00:00 2001
From: widmogrod <widmogrod@gmail.com>
Date: Sat, 11 May 2024 20:18:31 +0200
Subject: [PATCH] f: generic union example with JSON serialisation

---
 f/datas.go      |  4 ++--
 f/datas_test.go | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 f/datas_test.go

diff --git a/f/datas.go b/f/datas.go
index de331213..509ca02f 100644
--- a/f/datas.go
+++ b/f/datas.go
@@ -1,8 +1,8 @@
 package f
 
-//go:generate go run ../cmd/mkunion
+//go:generate go run ../cmd/mkunion --type-registry
 
-//go:tag mkunion:"Either"
+//go:tag mkunion:"Either,serde"
 type (
 	Left[A, B any]  struct{ Value A }
 	Right[A, B any] struct{ Value B }
diff --git a/f/datas_test.go b/f/datas_test.go
new file mode 100644
index 00000000..c18d1311
--- /dev/null
+++ b/f/datas_test.go
@@ -0,0 +1,13 @@
+package f
+
+import (
+	"fmt"
+	"github.com/widmogrod/mkunion/x/shared"
+)
+
+func ExampleEitherToJSON() {
+	var either Either[int, string] = &Right[int, string]{Value: "hello"}
+	result, _ := shared.JSONMarshal(either)
+	fmt.Println(string(result))
+	// Output: {"$type":"f.Right","f.Right":{"Value":"hello"}}
+}