src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs

   1 use std::error::Error;
   2 use std::fs;
   3
   4 pub struct Config {
   5     pub query: String,
   6     pub filename: String,
   7 }
   8
   9 impl Config {
  10     pub fn new(args: &[String]) -> Result<Config, &str> {
  11         if args.len() < 3 {
  12             return Err("not enough arguments");
  13         }
  14
  15         let query = args[1].clone();
  16         let filename = args[2].clone();
  17
  18         Ok(Config { query, filename })
  19     }
  20 }
  21
  22 pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
  23     let contents = fs::read_to_string(config.filename)?;
  24
  25     Ok(())
  26 }
  27
  28 // ANCHOR: here
  29 pub fn search(query: &str, contents: &str) -> Vec<&str> {
  30     vec![]
  31 }
  32 // ANCHOR_END: here
  33
  34 #[cfg(test)]
  35 mod tests {
  36     use super::*;
  37
  38     #[test]
  39     fn one_result() {
  40         let query = "duct";
  41         let contents = "\
  42 Rust:
  43 safe, fast, productive.
  44 Pick three.";
  45
  46         assert_eq!(vec!["safe, fast, productive."], search(query, contents));
  47     }
  48 }