Can I constantly repeat the same character to a `&str` in Rust?

Question

In Rust, we are able to use str::repeat -> String to repeat a string slice n times and get a String.

let pound_symbols = "#".repeat(5); // "#####" as String

However, this is evaluated on runtime. Is there a way to repeat the same character n times (which is constant) on compile time? Maybe a macro?

Using Rust 1.68.0