文盘Rust——领域交互模式如何实现

pub fn run() {
    let config = Config::builder()
        .history_ignore_space(true)
        .completion_type(CompletionType::List)
        .output_stream(OutputStreamType::Stdout)
        .build();

    let h = MyHelper {
        completer: get_command_completer(),
        highlighter: MatchingBracketHighlighter::new(),
        hinter: HistoryHinter {},
        colored_prompt: "".to_owned(),
        validator: MatchingBracketValidator::new(),
    };

    let mut rl = Editor::with_config(config);
    rl.set_helper(Some(h));

    if rl.load_history("/tmp/history").is_err() {
        println!("No previous history.");
    }

    loop {
        let p = format!("{}> ", "interact-rs");
        rl.helper_mut().expect("No helper").colored_prompt = format!("\x1b[1;32m{}\x1b[0m", p);
        let readline = rl.readline(&p);
        match readline {
            Ok(line) => {
                if line.trim_start().is_empty() {
                    continue;
                }

                rl.add_history_entry(line.as_str());
                match split(line.as_str()).as_mut() {
                    Ok(arg) => {
                        if arg[0] == "exit" {
                            println!("bye!");
                            break;
                        }
                        arg.insert(0, "clisample".to_string());
                        run_from(arg.to_vec())
                    }
                    Err(err) => {
                        println!("{}", err)
                    }
                }
            }
            Err(ReadlineError::Interrupted) => {
                println!("CTRL-C");
                break;
            }
            Err(ReadlineError::Eof) => {
                println!("CTRL-D");
                break;
            }
            Err(err) => {
                println!("Error: {:?}", err);
                break;
            }
        }
    }
    rl.append_history("/tmp/history")
        .map_err(|err| error!("{}", err))
        .ok();
}

let p = format!("{}> ", "interact-rs");
 rl.helper_mut().expect("No helper").colored_prompt = format!("\x1b[1;32m{}\x1b[0m", p);

rl.add_history_entry(line.as_str());

match split(line.as_str()).as_mut() {
                  Ok(arg) => {
                      if arg[0] == "exit" {
                          println!("bye!");
                          break;
                      }
                      arg.insert(0, "clisample".to_string());
                      run_from(arg.to_vec())
                  }
                  Err(err) => {
                      println!("{}", err)
                  }
              }

  Err(ReadlineError::Interrupted) => {
              println!("CTRL-C");
              break;
          }
          Err(ReadlineError::Eof) => {
              println!("CTRL-D");
              break;
          }
          Err(err) => {
              println!("Error: {:?}", err);
              break;
          }

let config = Config::builder()
  .history_ignore_space(true)
  .completion_type(CompletionType::List)
  .output_stream(OutputStreamType::Stdout)
  .build();

let h = MyHelper {
  completer: get_command_completer(),
  highlighter: MatchingBracketHighlighter::new(),
  hinter: HistoryHinter {},
  colored_prompt: "".to_owned(),
  validator: MatchingBracketValidator::new(),
}; 

rl.append_history("/tmp/history")
      .map_err(|err| error!("{}", err))
      .ok();