`into`

Prefix for methods that convert self into another type.

Consumes self, returns an owned value.

#![allow(unused)]
fn main() {
// Copyright 2025 Google LLC
// SPDX-License-Identifier: Apache-2.0

impl<T> Vec<T> {
    fn into_parts(self) -> (NonNull<T>, usize, usize);
}

impl<T> Cell<T> {
    fn into_inner(self) -> T;
}
}

- Prefix for a function that consumes an owned value and transforms it into a value of another type.

Not reinterpret cast! The data can be rearranged, reallocated, changed in any way, including losing information.

corollary to From
into_iter consumes a collection (like a vec, or a btreeset, or a hashmap) and produces an iterator over owned values, unlike iter and iter_mut which produce iterators over reference values.
Ask the class: what will Vec::into_raw_parts do?