src/tools/clippy/src/docs/unnecessary_to_owned.txt

   1 ### What it does
   2 Checks for unnecessary calls to [`ToOwned::to_owned`](https://doc.rust-lang.org/std/borrow/trait.ToOwned.html#tymethod.to_owned)
   3 and other `to_owned`-like functions.
   4
   5 ### Why is this bad?
   6 The unnecessary calls result in useless allocations.
   7
   8 ### Known problems
   9 `unnecessary_to_owned` can falsely trigger if `IntoIterator::into_iter` is applied to an
  10 owned copy of a resource and the resource is later used mutably. See
  11 [#8148](https://github.com/rust-lang/rust-clippy/issues/8148).
  12
  13 ### Example
  14 ```
  15 let path = std::path::Path::new("x");
  16 foo(&path.to_string_lossy().to_string());
  17 fn foo(s: &str) {}
  18 ```
  19 Use instead:
  20 ```
  21 let path = std::path::Path::new("x");
  22 foo(&path.to_string_lossy());
  23 fn foo(s: &str) {}
  24 ```