Function tupleops::apply[−][src]

pub fn apply<F, Tpl>(func: F, tpl: Tpl) -> Apply<F, Tpl> where
    (F, Tpl): TupleApply<F, Tpl>,

This is supported on crate feature apply only.

Expand description

Call a function with the tuples members as arguments.

The function F can be &Fn or &mut FnMut.

use tupleops::apply;

fn add3(a: u32, b: u32, c: u32) -> u32 {
    a + b + c
}

let tpl3 = (1, 2, 3);
assert_eq!(apply(&add3, tpl3), 6);

use tupleops::apply;

let mut counter = 0;
let mut prefixsum3 = |a, b, c| {
    counter += a + b + c;
    counter
};

assert_eq!(apply(&mut prefixsum3, (1, 2, 3)), 6);
assert_eq!(apply(&mut prefixsum3, (4, 5, 6)), 21);
assert_eq!(apply(&mut prefixsum3, (7, 8, 9)), 45);