Unable to find a solution to fn num_sq<T>(arg: &mut T)

[CaliViking]

For reference, see:

Related exercise:

rustlings/exercises/conversions/as_ref_mut.rs

Line 22 in 300cdc2

fn num_sq<T>(arg: &mut T) {

Related unit test:

rustlings/exercises/conversions/as_ref_mut.rs

Line 55 in 300cdc2

fn mult_box() {

Related pull request (solves only part of the problem): #1113

Background information:

rustc --version
rustc 1.62.1 (e092d0b6b 2022-07-16)

rustlings --version 
v5.0.0

ls -la
total 7868
drwxr-xr-x  9 niels niels    4096 Aug  6 16:17 .
drwxrwxrwx 31 niels niels    4096 Aug  6 17:14 ..
-rw-r--r--  1 niels niels   36818 Aug  1 13:15 .all-contributorsrc
-rw-r--r--  1 niels niels     102 Aug  1 13:15 .editorconfig
drwxr-xr-x  8 niels niels    4096 Aug  5 19:38 .git
drwxr-xr-x  3 niels niels    4096 Aug  1 13:15 .github
-rw-r--r--  1 niels niels     139 Aug  1 13:15 .gitignore
-rw-r--r--  1 niels niels     150 Aug  1 13:15 .gitpod.yml
-rw-r--r--  1 niels niels     104 Aug  1 13:15 .replit
drwxr-xr-x  2 niels niels    4096 Aug  2 17:03 .vscode
-rw-r--r--  1 niels niels   44269 Aug  1 13:15 AUTHORS.md
-rw-r--r--  1 niels niels   41137 Aug  1 13:15 CHANGELOG.md
-rw-r--r--  1 niels niels    4171 Aug  1 13:15 CONTRIBUTING.md
-rw-r--r--  1 niels niels   16506 Aug  5 19:49 Cargo.lock
-rw-r--r--  1 niels niels     497 Aug  1 13:15 Cargo.toml
-rw-r--r--  1 niels niels    1095 Aug  1 13:15 LICENSE
-rw-r--r--  1 niels niels    5799 Aug  1 13:15 README.md
drwxr-xr-x 26 niels niels    4096 Aug  2 13:52 exercises
-rw-r--r--  1 niels niels   40537 Aug  1 13:15 info.toml
-rw-r--r--  1 niels niels    3022 Aug  1 13:15 install.ps1
-rwxr-xr-x  1 niels niels    4591 Aug  1 13:15 install.sh
-rw-r--r--  1 niels niels    8696 Aug  1 13:17 rust-project.json
drwxr-xr-x  2 niels niels    4096 Aug  1 13:15 src
drwxr-xr-x  4 niels niels    4096 Aug  5 19:49 target
-rwxr-xr-x  1 niels niels 3879296 Aug  2 22:55 temp_3632_ThreadId1
-rwxr-xr-x  1 niels niels 3879248 Aug  2 22:56 temp_9867_ThreadId1
drwxr-xr-x  3 niels niels    4096 Aug  1 13:15 tests
niels@DESKTOP-GU276AE:~/git/rustlings$

The observed issues:

It is not clear what the exercise is trying to teach

Please provide some context to the use case of passing u32 in a Box.

I can find no way to solve it

Are there examples of good solutions to the exercises available?

[maxcurzi]

see #1156

[CaliViking]

@maxcurzi - thanks for the follow up. Not sure I am any wiser, but I will close the issue for now.