tests/ui/unnecessary_join.rs

   1 // run-rustfix
   2 #![warn(clippy::unnecessary_join)]
   3 #![allow(clippy::uninlined_format_args)]
   4
   5 fn main() {
   6     // should be linted
   7     let vector = vec!["hello", "world"];
   8     let output = vector
   9         .iter()
  10         .map(|item| item.to_uppercase())
  11         .collect::<Vec<String>>()
  12         .join("");
  13     println!("{}", output);
  14
  15     // should be linted
  16     let vector = vec!["hello", "world"];
  17     let output = vector
  18         .iter()
  19         .map(|item| item.to_uppercase())
  20         .collect::<Vec<_>>()
  21         .join("");
  22     println!("{}", output);
  23
  24     // should not be linted
  25     let vector = vec!["hello", "world"];
  26     let output = vector
  27         .iter()
  28         .map(|item| item.to_uppercase())
  29         .collect::<Vec<String>>()
  30         .join("\n");
  31     println!("{}", output);
  32
  33     // should not be linted
  34     let vector = vec!["hello", "world"];
  35     let output = vector.iter().map(|item| item.to_uppercase()).collect::<String>();
  36     println!("{}", output);
  37 }