diff options
| -rw-r--r-- | library/core/src/any.rs | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/library/core/src/any.rs b/library/core/src/any.rs index b140c9eb452..eef8f2046d3 100644 --- a/library/core/src/any.rs +++ b/library/core/src/any.rs @@ -17,11 +17,12 @@ //! # Smart pointers and `dyn Any` //! //! One piece of behavior to keep in mind when using `Any` as a trait object, -//! especially with types like `Box<dyn Any>` or `Arc<dyn Any>` is that simply +//! especially with types like `Box<dyn Any>` or `Arc<dyn Any>`, is that simply //! calling `.type_id()` on the value will produce the `TypeId` of the -//! container, and not the underlying trait object. This can be avoided +//! *container*, not the underlying trait object. This can be avoided by //! converting the smart pointer into a `&dyn Any` instead, which will return -//! the object's type id. For example: +//! the object's `TypeId`. For example: +//! //! ``` //! use std::any::{Any, TypeId}; //! @@ -32,7 +33,6 @@ //! // ... than this: //! let boxed_id = boxed.type_id(); //! -//! // Both of these assertions pass //! assert_eq!(actual_id, TypeId::of::<i32>()); //! assert_eq!(boxed_id, TypeId::of::<Box<dyn Any>>()); //! ``` |