Trait std::iter::MultiplicativeIteratorUnstable

pub trait MultiplicativeIterator<A> {
    fn product(self) -> A;
}

A trait for iterators over elements which can be multiplied together.

Required Methods

fn product(self) -> A

Iterates over the entire iterator, multiplying all the elements

Examples

fn main() { use std::iter::{count, MultiplicativeIterator}; fn factorial(n: usize) -> usize { count(1, 1).take_while(|&i| i <= n).product() } assert!(factorial(0) == 1); assert!(factorial(1) == 1); assert!(factorial(5) == 120); }

use std::iter::{count, MultiplicativeIterator};

fn factorial(n: usize) -> usize {
    count(1, 1).take_while(|&i| i <= n).product()
}
assert!(factorial(0) == 1);
assert!(factorial(1) == 1);
assert!(factorial(5) == 120);

Implementors

• impl<T> MultiplicativeIterator<i8> for T where T: Iterator, <T as Iterator>::Item == i8
• impl<T> MultiplicativeIterator<i16> for T where T: Iterator, <T as Iterator>::Item == i16
• impl<T> MultiplicativeIterator<i32> for T where T: Iterator, <T as Iterator>::Item == i32
• impl<T> MultiplicativeIterator<i64> for T where T: Iterator, <T as Iterator>::Item == i64
• impl<T> MultiplicativeIterator<isize> for T where T: Iterator, <T as Iterator>::Item == isize
• impl<T> MultiplicativeIterator<u8> for T where T: Iterator, <T as Iterator>::Item == u8
• impl<T> MultiplicativeIterator<u16> for T where T: Iterator, <T as Iterator>::Item == u16
• impl<T> MultiplicativeIterator<u32> for T where T: Iterator, <T as Iterator>::Item == u32
• impl<T> MultiplicativeIterator<u64> for T where T: Iterator, <T as Iterator>::Item == u64
• impl<T> MultiplicativeIterator<usize> for T where T: Iterator, <T as Iterator>::Item == usize
• impl<T> MultiplicativeIterator<f32> for T where T: Iterator, <T as Iterator>::Item == f32
• impl<T> MultiplicativeIterator<f64> for T where T: Iterator, <T as Iterator>::Item == f64