rust/step1_read_print.rs

   1 #[macro_use]
   2 extern crate lazy_static;
   3 extern crate regex;
   4 extern crate itertools;
   5 extern crate fnv;
   6
   7 extern crate rustyline;
   8 use rustyline::error::ReadlineError;
   9 use rustyline::Editor;
  10
  11 #[macro_use]
  12 #[allow(dead_code)]
  13 mod types;
  14 use types::{format_error};
  15 mod reader;
  16 mod printer;
  17 // TODO: figure out a way to avoid including env
  18 #[allow(dead_code)]
  19 mod env;
  20
  21 fn main() {
  22   // `()` can be used when no completer is required
  23   let mut rl = Editor::<()>::new();
  24   if rl.load_history(".mal-history").is_err() {
  25       eprintln!("No previous history.");
  26   }
  27
  28   loop {
  29     let readline = rl.readline("user> ");
  30     match readline {
  31       Ok(line) => {
  32         rl.add_history_entry(&line);
  33         rl.save_history(".mal-history").unwrap();
  34         if line.len() > 0 {
  35           match reader::read_str(line) {
  36             Ok(mv) => {
  37               println!("{}", mv.pr_str(true));
  38             },
  39             Err(e)  => println!("Error: {}", format_error(e)),
  40           }
  41         }
  42       },
  43       Err(ReadlineError::Interrupted) => continue,
  44       Err(ReadlineError::Eof) => break,
  45       Err(err) => {
  46         println!("Error: {:?}", err);
  47         break
  48       }
  49     }
  50   }
  51 }
  52
  53 // vim: ts=2:sw=2:expandtab