[clang-tools-extra] [clang-tidy] Add a new check 'replace-with-string-view' (PR #172170)

[via cfe-commits]

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@@ -0,0 +1,68 @@
+.. title:: clang-tidy - performance-replace-with-string-view
+
+performance-replace-with-string-view
+====================================
+
+Looks for functions returning `std::[w|u8|u16|u32]string` and suggests to
+change it to `std::[...]string_view` for performance reasons if possible.
----------------
EugeneZelenko wrote:

```suggestion
Looks for functions returning ``std::[w|u8|u16|u32]string`` and suggests to
change it to ``std::[...]string_view`` for performance reasons if possible.
```

https://github.com/llvm/llvm-project/pull/172170