Url::parse does not encode backslash as %5C

Creating an URL with let mut url = "file:///foobar.com/foo\\bar".parse::<Url>().unwrap(); yields file:///foobar.com/foo/bar

I was expecting the backslash, for protocols like file://, http:// & https://, to be encoded as %5C or an error but instead it is converted to a forward slash. Maybe this is as per spec, i'm not sure, just confused 😅

Creating an URL with

let mut url = "file:///foobar.com/".parse::<Url>().unwrap();
url.path_segments_mut().unwrap().push("foo\\bar");

yields (the to me expected) file:///foobar.com//foo%5Cbar

Also parsing with Url::from_file_path("/path/to/folder/with\\backslash/in/folder/name") yields file:///path/to/folder/with\\backslash/in/folder/name and does not convert to forward slash.

I find all this confusing so i might be wrong but i expected that Url::from_file_path and Url::parse to be consistent. As it is now these two yield different results:

Url::from_file_path("/path/to/folder/with\\backslash/in/folder/name"); // yields file:// url with backslash present
Url::parse("file:///path/to/folder/with\\backslash/in/folder/name"); // yields file:// url with backslash converted to forward slash

Compare the behavior of Url::parse, path_segments_mut, and Url::from_file_path for backslashes in file, http, and https URLs, then check the relevant URL specification rules. Done means the intended behavior is established and the inconsistent parsing result is resolved or clearly documented with regression coverage.