rename a json file in rust

To rename a JSON file in Rust, you can use the fs::rename function provided by the Rust standard library. Here's an example code that shows how to rename a file named input.json to output.json:

main.rs
use std::fs;

fn main() -> std::io::Result<()> {
    let old_file_name = "input.json";
    let new_file_name = "output.json";

    // Renaming the file.
    fs::rename(old_file_name, new_file_name)?;

    Ok(())
}
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In this code, we first define the old file name and the new file name that we want to use for our JSON file. We then call the fs::rename function to rename the file. Note that this function returns a std::io::Result<()> value that indicates whether the file has been renamed successfully or not.

Make sure to handle any errors that can occur while renaming the file by using a match or ? operator to propagate the errors up the call stack.