Add docs.

2022-08-14 18:16:35 +08:00
parent 855ddd28a6
commit 5f2262214d
2 changed files with 5 additions and 0 deletions
--- a/src/types/dynamic.rs
+++ b/src/types/dynamic.rs
@@ -186,6 +186,9 @@ pub enum Union {
    TimeStamp(Box<Instant>, Tag, AccessMode),

    /// Any type as a trait object.
+    ///
+    /// An extra level of redirection is used in order to avoid bloating the size of [`Dynamic`]
+    /// because `Box<dyn Variant>` is a fat pointer.
    Variant(Box<Box<dyn Variant>>, Tag, AccessMode),

    /// A _shared_ value of any type.