From 2ca21fb7b42917ea6dab0787d7990f61630b1a2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Gra=C3=B1a?= <dangra@gmail.com>
Date: Tue, 23 Jan 2024 15:06:33 -0300
Subject: [PATCH] Support encoding of pointers to embedded structs (#924)

---
 marshaler.go      |  2 ++
 marshaler_test.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/marshaler.go b/marshaler.go
index 6fe7853..5aaff3b 100644
--- a/marshaler.go
+++ b/marshaler.go
@@ -707,6 +707,8 @@ func walkStruct(ctx encoderCtx, t *table, v reflect.Value) {
 			if fieldType.Anonymous {
 				if fieldType.Type.Kind() == reflect.Struct {
 					walkStruct(ctx, t, f)
+				} else if fieldType.Type.Kind() == reflect.Pointer && !f.IsNil() && f.Elem().Kind() == reflect.Struct {
+					walkStruct(ctx, t, f.Elem())
 				}
 				continue
 			} else {
diff --git a/marshaler_test.go b/marshaler_test.go
index c4869c8..d984010 100644
--- a/marshaler_test.go
+++ b/marshaler_test.go
@@ -1304,6 +1304,38 @@ value = ''
 	require.Equal(t, expected, string(result))
 }
 
+func TestMarshalNestedAnonymousStructs_PointerEmbedded(t *testing.T) {
+	type Embedded struct {
+		Value   string  `toml:"value" json:"value"`
+		Omitted string  `toml:"omitted,omitempty"`
+		Ptr     *string `toml:"ptr"`
+	}
+
+	type Named struct {
+		Value string `toml:"value" json:"value"`
+	}
+
+	type Doc struct {
+		*Embedded
+		*Named    `toml:"named" json:"named"`
+		Anonymous struct {
+			*Embedded
+			Value *string `toml:"value" json:"value"`
+		} `toml:"anonymous,omitempty" json:"anonymous,omitempty"`
+	}
+
+	doc := &Doc{
+		Embedded: &Embedded{Value: "foo"},
+	}
+
+	expected := `value = 'foo'
+`
+
+	result, err := toml.Marshal(doc)
+	require.NoError(t, err)
+	require.Equal(t, expected, string(result))
+}
+
 func TestLocalTime(t *testing.T) {
 	v := map[string]toml.LocalTime{
 		"a": {