4 releases
0.1.4 | Feb 1, 2024 |
---|---|
0.1.3 | Jan 5, 2024 |
0.1.2 | Dec 6, 2023 |
0.1.0 | Dec 6, 2023 |
#1797 in Procedural macros
1,367 downloads per month
Used in simics-test
35KB
484 lines
Getters2
Getters2 is the real best "auto-getters"/"auto-setters" crate for Rust.
- Selectable immutable/mutable/clone/deref getters
- Support for named, tuple, and newtype structs
- Support for named, tuple, and newtype enums
Installation
cargo add getters2
or, add it to Cargo.toml
[dependencies]
getters2 = "0.1.0"
Examples
Getters2 has a dead simple API.
Structs
use getters2::Getters;
#[derive(Getters)]
#[getters(mutable, clone, deref)]
struct Vector3 {
x: f32,
y: f32,
z: f32,
#[getters(skip, skip_mutable, skip_clone, skip_deref)]
name: String,
}
let mut v = Vector3 { x: 1.0, y: 2.0, z: 3.0, name: "MyVec".to_string() };
assert_eq!(v.x_ref(), &1.0);
assert_eq!(v.y_ref(), &2.0);
assert_eq!(v.z_ref(), &3.0);
assert_eq!(v.x_deref(), 1.0);
assert_eq!(v.y_deref(), 2.0);
assert_eq!(v.z_deref(), 3.0);
assert_eq!(v.x_clone(), 1.0);
assert_eq!(v.y_clone(), 2.0);
assert_eq!(v.z_clone(), 3.0);
*v.x_mut() = 4.0;
*v.y_mut() = 5.0;
*v.z_mut() = 6.0;
assert_eq!(v.x_ref(), &4.0);
assert_eq!(v.y_ref(), &5.0);
assert_eq!(v.z_ref(), &6.0);
Enums
use getters2::Getters;
#[derive(Getters)]
#[getters(deref, clone, mutable)]
enum Animal {
Dog { name: String, age: u8 },
Cat { name: String, age: u8 },
}
let mut dog = Animal::Dog { name: "Rover".to_string(), age: 5 };
let mut cat = Animal::Cat { name: "Mittens".to_string(), age: 3 };
assert_eq!(dog.dog_name_ref(), Some(&"Rover".to_string()));
assert_eq!(dog.dog_name_deref(), Some("Rover".to_string()));
assert_eq!(dog.dog_name_clone(), Some("Rover".to_string()));
assert_eq!(dog.dog_age_ref(), Some(&5));
assert_eq!(dog.dog_age_deref(), Some(5));
assert_eq!(dog.dog_age_clone(), Some(5));
let Some(dog_name) = dog.dog_name_mut() else {
panic!("Expected Some");
};
*dog_name = "Spot".to_string();
assert_eq!(dog.dog_name_ref(), Some(&"Spot".to_string()));
assert_eq!(cat.cat_name_ref(), Some(&"Mittens".to_string()));
assert_eq!(cat.cat_name_deref(), Some("Mittens".to_string()));
assert_eq!(cat.cat_name_clone(), Some("Mittens".to_string()));
assert_eq!(cat.cat_age_ref(), Some(&3));
assert_eq!(cat.cat_age_deref(), Some(3));
assert_eq!(cat.cat_age_clone(), Some(3));
let Some(cat_name) = cat.cat_name_mut() else {
panic!("Expected Some");
};
*cat_name = "Whiskers".to_string();
assert_eq!(cat.cat_name_ref(), Some(&"Whiskers".to_string()));
Prior Art
There are a lot of crates that claim to do this. Getters2 has something they all don't.
- accessors - Unmaintained
- accessors-rs - Doesn't support Enums
- getters - Yanked
- derive-getters - Doesn't support enums
Dependencies
~0.7–1.2MB
~26K SLoC