Struct core_extensions::iterators::IterCloner

pub struct IterCloner<'a, I: 'a> {
    pub iter: &'a I,
}

Constructs an Iterator by cloning the one it references,if the Iterator is Clone.

Constructs an Iterator inside IntoIterator::into_iter by cloning the one it references.

To construct this from an iterator value use this macro ,

Closures can be Copy and/or Clone since Rust 1.26 ,this affects iterators since most iterator methods take closures.

Example

This example only runs from Rust 1.26 onwards,

use core_extensions::iterators::IterCloner;

let list=vec!["hello","awesome","world"];
let iter=list.iter().map(|v|v.len()).filter(|&v| v<6 );
{
    let iter_clone=IterCloner::new(&iter);
    
    for _ in 0..2{
        assert_eq!(iter_clone.into_iter().collect::<Vec<_>>(),vec![5,5]);
    }
}
assert_eq!(iter.into_iter().collect::<Vec<_>>(),vec![5,5]);

Fields

iter: &'a I

The iterator being cloned.

Methods

impl<'a, I: 'a> IterCloner<'a, I> where     I: Iterator + Clone,

pub fn new(iter: &'a I) -> Self

Constructs an IterCloner.

Trait Implementations

impl<'a, I> Copy for IterCloner<'a, I>

impl<'a, I> Clone for IterCloner<'a, I>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, I: 'a> IntoIterator for IterCloner<'a, I> where     I: Iterator + Clone,

type Item = I::Item

The type of the elements being iterated over.

type IntoIter = I

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.