Trait BinaryOperator 

pub trait BinaryOperator<T>: BiTransformer<T, T, T> { }

BinaryOperator trait - marker trait for binary operators

A binary operator takes two values of type T and produces a value of the same type T. This trait extends BiTransformer<T, T, T> to provide semantic clarity for same-type binary operations. Equivalent to Java’s BinaryOperator<T> which extends BiFunction<T, T, T>.

Automatic Implementation

This trait is automatically implemented for all types that implement BiTransformer<T, T, T>, so you don’t need to implement it manually.

Type Parameters

• T - The type of both input values and the output value

Examples

Using in generic constraints

use prism3_function::{BinaryOperator, BiTransformer};

fn reduce<T, O>(values: Vec<T>, initial: T, op: O) -> T
where
    O: BinaryOperator<T>,
    T: Clone,
{
    values.into_iter().fold(initial, |acc, val| op.apply(acc, val))
}

let sum = |a: i32, b: i32| a + b;
assert_eq!(reduce(vec![1, 2, 3, 4], 0, sum), 10);

With concrete types

use prism3_function::{BoxBinaryOperator, BinaryOperator, BiTransformer};

fn create_adder() -> BoxBinaryOperator<i32> {
    BoxBinaryOperator::new(|x, y| x + y)
}

let op = create_adder();
assert_eq!(op.apply(20, 22), 42);

Author

Hu Haixing

Implementors

impl<F, T> BinaryOperator<T> for F

where F: BiTransformer<T, T, T>, T: 'static,

Blanket implementation of BinaryOperator for all BiTransformer<T, T, T>

This automatically implements BinaryOperator<T> for any type that implements BiTransformer<T, T, T>.

Author

Hu Haixing