tests/ui/writeln_empty_string.rs

   1 // run-rustfix
   2
   3 #![allow(unused_must_use)]
   4 #![warn(clippy::writeln_empty_string)]
   5 use std::io::Write;
   6
   7 fn main() {
   8     let mut v = Vec::new();
   9
  10     // These should fail
  11     writeln!(&mut v, "");
  12
  13     let mut suggestion = Vec::new();
  14     writeln!(&mut suggestion, "");
  15
  16     // These should be fine
  17     writeln!(&mut v);
  18     writeln!(&mut v, " ");
  19     write!(&mut v, "");
  20 }