Trait UpSet 

pub trait UpSet<T, Marker> {
    // Required method
    fn up_set(self, value: T) -> T;
}

Set a new value, or compute it using a closure.

Examples

use up_set::UpSet;

#[derive(Debug, Eq, PartialEq)]
struct Person {
    age: u8
}

impl Person {
    fn age<M, U: UpSet<u8, M>>(mut self, up_set: U) -> Self {
        self.age = up_set.up_set(self.age);
        self
    }
}

// Set age to 4
assert_eq!(Person { age: 55 }.age(4), Person { age: 4 });

// Add +4 to existing age
assert_eq!(Person { age: 55 }.age(|age| age + 4), Person { age: 59 });

See the crate-level documentation for more info.

Required Methods

fn up_set(self, value: T) -> T

Implementors

impl<T> UpSet<T, Set> for T

impl<T, F: FnOnce(T) -> T> UpSet<T, Update> for F