serde

src/tool/id.rs

@@ -34,6 +34,10 @@ pub fn is_buf<T: 'static>() -> bool {
     TypeId::of::<T>() == TypeId::of::<Vec<u8>>()
 }
 
+pub fn is_unit<T: 'static>() -> bool {
+    TypeId::of::<T>() == TypeId::of::<()>()
+}
+
 pub fn short_link_hash(input: &str) -> String {
     let mut hasher = DefaultHasher::new();
     input.hash(&mut hasher);