Function get_program_input 

pub fn get_program_input(
    program_input: &Option<PathBuf>,
) -> Result<Option<String>>

Reads the input for a Cairo program from a file.

This function checks if an input file is provided. If so, it reads the entire content of the file into a String and returns it wrapped in Some. If no input file is provided, it returns Ok(None).

Arguments

• program_input - An optional file path to the input file.

Errors

Returns an io::Error if there is an issue reading the input file.