decoder: handle private anonymous structs

Ref #508

targets.go

@@ -516,11 +516,10 @@ func scopeStruct(v reflect.Value, name string) (target, bool, error) {
 				l := len(path)
 				path = append(path, i)
 				f := t.Field(i)
-				if f.PkgPath != "" {
+				if f.Anonymous {
-					// only consider exported fields
-				} else if f.Anonymous {
 					walk(v.Field(i))
-				} else {
+				} else if f.PkgPath == "" {
+					// only consider exported fields
 					fieldName, ok := f.Tag.Lookup("toml")
 					if !ok {
 						fieldName = f.Name

unmarshaler_test.go

@@ -931,3 +931,19 @@ func TestIssue287(t *testing.T) {
 	}
 	require.Equal(t, expected, v)
 }
+
+func TestIssue508(t *testing.T) {
+	type head struct {
+		Title string `toml:"title"`
+	}
+	type text struct {
+		head
+	}
+
+	var b = []byte(`title = "This is a title"`)
+
+	t1 := text{}
+	err := toml.Unmarshal(b, &t1)
+	require.NoError(t, err)
+	require.Equal(t, "This is a title", t1.head.Title)
+}