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Update traits.md

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lodisy 2023-01-31 19:00:53 +08:00 committed by Andrew Walbran
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@ -41,7 +41,7 @@ fn main() {
* Traits may specify pre-implemented (default) methods and methods that users are required to implement themselves. Methods with default implementations can rely on required methods.
* Types that implement a given trait may be of different sizes. This makes it impossible to have things like `Vec<Greet>` in the example above.
* `dyn Greet` is a way to tell the compiler about a dynamically sized type that implements `Greet`.
* In the example, `pets` holds Fat Pointers to objects that implement `Greet`. The Fat Pointer consist of two components, a pointer to the actual object and a pointer to the virtual method table for the `Greet` implementation of that particular object.
* In the example, `pets` holds Fat Pointers to objects that implement `Greet`. The Fat Pointer consists of two components, a pointer to the actual object and a pointer to the virtual method table for the `Greet` implementation of that particular object.
Compare these outputs in the above example:
```rust,ignore