1 files changed, 17 insertions, 0 deletions
diff --git a/danmaku/dmmsg/util.go b/danmaku/dmmsg/util.go
new file mode 100644
index 0000000..9d41ab9
--- /dev/null
+++ b/danmaku/dmmsg/util.go
@@ -0,0 +1,17 @@
+package dmmsg
+
+import (
+	"fmt"
+	"reflect"
+)
+
+func castValue[T any](obj interface{}) (thing T, err error) {
+	casted, ok := (obj).(T)
+	if !ok {
+		err = fmt.Errorf("%s: required value is not of type \"%v\": %v",
+			kInvalidDanmakuJson, reflect.TypeOf(thing).String(), obj)
+		return
+	}
+	thing = casted
+	return
+}