Function apply_pair_pipeline

tests/binary/fn_pointers/src/main.rs:60–63

(pair: Pair<fn(T) -> T, fn(T) -> T>, val: T)

}

fn apply_pair_pipeline<T>(pair: Pair<fn(T) -> T, fn(T) -> T>, val: T) -> T {
    let intermediate = (pair.first)(val);
    (pair.second)(intermediate)
}

fn derivative(f: fn(f64) -> f64, x: f64, h: f64) -> f64 {
    (f(x + h) - f(x)) / h