October 2018
Beginner
180 pages
4h 48m
English
Content preview from Rust Quick Start Guide
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AddAssign, MulAssign, SubAssign, and DivAssign
These traits enable the +=, *=, -=, and /= operators for the types that implement them.
They are similar to the Add, Sub, Mul, and Div traits, with the difference that their implementation functions take &mut self instead of plain self. Instead of consuming their left-side input, they have the ability to change its contained value.
All of these traits follow the same pattern, so here's an example implementation of AddAssign:
pub enum AddExample { One, Two, Three, Many,}impl AddAssign for AddExample { fn add_assign(&mut self, other: AddExample) { *self = match (&self, other) { (AddExample::One, AddExample::One) => AddExample::Two, (AddExample::One, AddExample::Two) => AddExample::Three, (AddExample::Two, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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