Minor tidy

Dependencies

• [2] AV73DYWQ Initial functions for using sqlite in async environment
• [3] HMOBTVJ4 Initialize crate and add expected dependencies

Change contents

• replacement in src/names_database.rs at line 16
  [2.545]→[2.545:646](∅→∅)
  − struct AsyncConnection(

  − mpsc::Sender<Box<dyn for<'a> FnOnce(&'a sqlite::Connection) + Send>>,

  − );
  [2.545]

  [2.646]
  + type DBFunction = Box<dyn for<'a> FnOnce(&'a sqlite::Connection) + Send>;
• edit in src/names_database.rs at line 18
  [2.647]

  [2.647]
  + pub struct AsyncConnection(mpsc::Sender<DBFunction>);

  +
• replacement in src/names_database.rs at line 24
  [2.806]→[2.806:960](∅→∅)
  − let (tx, mut rx): (

  − _,

  − mpsc::Receiver<Box<dyn for<'a> FnOnce(&sqlite::Connection) + Send>>,

  − ) = mpsc::channel(1);
  [2.806]

  [2.960]
  + let (tx, mut rx): (_, mpsc::Receiver<DBFunction>) = mpsc::channel(1);
• edit in src/main.rs at line 1
  [3.49]

  [2.1990]
  + mod gather;
• replacement in src/main.rs at line 5
  [2.2026]→[2.2026:2044](∅→∅),[2.2044]→[3.62:93](∅→∅),[3.62]→[3.62:93](∅→∅)
  − async fn main() {

  − println!("Hello, world!");
  [2.2026]

  [3.93]
  + async fn main() -> Result<(), Box<dyn std::error::Error>> {

  + use std::env;

  + let _db = names_database::AsyncConnection::open(env::args().nth(1).ok_or(ArgsError::NoArgs)?).await?;

  + Ok(())
• edit in src/main.rs at line 10
  [3.95]
  +

  + #[derive(Debug)]

  + enum ArgsError {

  + NoArgs,

  + }

  +

  + impl std::error::Error for ArgsError {}