Rust methods: Difference between revisions
From wikinotes
(→Basics) |
|||
Line 21: | Line 21: | ||
impl RgbColor { | impl RgbColor { | ||
// ~static-method | |||
fn red() -> Self { | fn red() -> Self { | ||
Self { | Self { | ||
Line 29: | Line 30: | ||
} | } | ||
// method | |||
fn brighten(&self) { | fn brighten(&self) { | ||
self.r += 8; | self.r += 8; |
Revision as of 19:58, 7 February 2023
Rust lets you add methods to structs.
TODO:
other types? what's the full spectrum here?
Associated Functions
Rust lets you add methods to structs using
impl
.
self
is a reference to the instanceSelf
is a reference to the object-typeimpl
allows you to associate functions to an object- you can have as many
impl
blocks as you'd liketype RgbColor{ r: u8, g: u8, b: u8, } impl RgbColor { // ~static-method fn red() -> Self { Self { r: 255, g: 0, b: 0, } } // method fn brighten(&self) { self.r += 8; self.g += 8; self.b += 8; } } // methods let c = RgbColor{r: 8, g: 8, b: 8}; c.brighen(); // {r: 16, g: 16, b: 16} // class methods red = RgbColor::red()Similar to go, you can use the
.
operator to access methods on either a reference or an instance.
rust will automatically dereference it for you.