rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-03-18 05:37:52 +02:00
Code Issues Releases Activity

Default trait slides cleanup (#1038)

Browse Source 
* Default trait slides cleanup

* Update src/traits/default.md

Co-authored-by: Martin Geisler <martin@geisler.net>

---------

Co-authored-by: Martin Geisler <martin@geisler.net>
This commit is contained in:
Dominik Maier 2023-07-27 15:53:47 +02:00 committed by GitHub
parent 14bfd7b723
commit a7a9ee84b4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/traits/default.md
View File

@ -20,12 +20,12 @@ impl Default for Implemented {
}
fn main() {
let default_struct: Derived = Default::default();
let default_struct = Derived::default();
println!("{default_struct:#?}");
let almost_default_struct = Derived {
y: "Y is set!".into(),
..Default::default()
..Derived::default()
};
println!("{almost_default_struct:#?}");
@ -43,7 +43,9 @@ fn main() {
* Standard Rust types often implement `Default` with reasonable values (e.g. `0`, `""`, etc).
* The partial struct copy works nicely with default.
* Rust standard library is aware that types can implement `Default` and provides convenience methods that use it.
* the `..` syntax is called [struct update syntax][2]
</details>
[1]: https://doc.rust-lang.org/std/default/trait.Default.html
[2]: https://doc.rust-lang.org/book/ch05-01-defining-structs.html#creating-instances-from-other-instances-with-struct-update-syntax