I was looking at namely issue #99751 when I thought about this. If work is being put into improving error messages when somebody uses a keyword that defines a function in another language, there should also be improved error messages if someone uses the incorrect directive to bring something into the scope of their module or namespace/

Given the following code: Playground Link

import std::mem;
using std::mem;
require std::mem;

The current output is:

error: expected one of `!` or `::`, found `std`
 --> src/main.rs:1:8
  |
1 | import std::mem;
  |        ^^^ expected one of `!` or `::`

error: could not compile `playground` due to previous error

The error message should preferably suggest the user to use the use directive to bring something into scope of their module.