papyrus comes with the command load which lets you load a file as source code. papyrus accepts both *.rs and *.rscript files, and handles the code slightly differently when it loads it into the Repl.

• *.rs files are treated as source files where code is defined with functions and structs, etc.
• *.rscript files are treated like expressions, where each line is passed through to the main function.

Load is used with the syntax =>.load <filename>.

Let us define a source file pwr.rs.

# #![allow(unused_variables)]
#fn main() {
fn pwr(base: u32, exponent: u32) -> u32 {
  (0..=exponent).into_iter().fold(1, |acc, x| acc * base)
}
#}

In the papyrus repl:

papyrus=> .load pwr.rs
papyrus=> pwr(2,3)
papyrus [out0]: 8
papyrus=>

Let us define a source file count_files.rscript.

# #![allow(unused_variables)]
#fn main() {
let dir = std::env::current_dir().unwrap();
let mut count = 0;
for entry in dir.read_dir().unwrap() {
  if entry.is_ok() {
    count += 1;
  }
}
count
#}

In the papyrus repl:

papyrus=> .load count_files.rscript
papyrus [out0]: 20
papyrus=>

The number of files will vary.