Crate iter_n

A utility for functions returning impl Iterator to return one of several distinct types.

Examples

use iter_n::iter2::* must be placed in function scope, not in module scope.

Since iter_n::iter2, iter_n::iter3, etc. define methods of the same name, if multiple use iter_n::iter{N}::*; are placed in the module scope, there will be a conflict with the methods.

fn f(x: i32) -> impl Iterator<Item = i32> {
    use iter_n::iter2::*;
    if x % 2 == 0 {
        [0, 1].iter().map(|y| y + 1).into_iter0()
    } else {
        [0, 1].iter().map(|y| y + 2).into_iter1()
    }
}

fn g(x: i32) -> impl Iterator<Item = i32> {
    use iter_n::iter3::*;
    if x % 3 == 0 {
        [0, 1].iter().map(|y| y + 1).into_iter0()
    } else if x % 3 == 0 {
        [0, 1].iter().map(|y| y + 2).into_iter1()
    } else {
        [0, 1].iter().map(|y| y + 3).into_iter2()
    }
}

Modules

iter1

iter2

iter3

iter4

iter5

iter6

iter7

iter8

iter9

iter10

iter11

iter12