a few more diagnostic items

Author: anall

alloc/src/borrow.rs

@@ -31,8 +31,8 @@ where
 /// implementing the `Clone` trait. But `Clone` works only for going from `&T`
 /// to `T`. The `ToOwned` trait generalizes `Clone` to construct owned data
 /// from any borrow of a given type.
-#[stable(feature = "rust1", since = "1.0.0")]
 #[cfg_attr(not(test), rustc_diagnostic_item = "ToOwned")]
+#[stable(feature = "rust1", since = "1.0.0")]
 pub trait ToOwned {
     /// The resulting type after obtaining ownership.
     #[stable(feature = "rust1", since = "1.0.0")]

alloc/src/string.rs

@@ -2174,6 +2174,7 @@ impl FromStr for String {
 /// implementation for free.
 ///
 /// [`Display`]: fmt::Display
+#[cfg_attr(not(test), rustc_diagnostic_item = "ToString")]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub trait ToString {
     /// Converts the given value to a `String`.

std/src/ffi/os_str.rs

@@ -90,6 +90,7 @@ pub struct OsString {
 ///
 /// [`&str`]: str
 /// [conversions]: super#conversions
+#[cfg_attr(not(test), rustc_diagnostic_item = "OsStr")]
 #[stable(feature = "rust1", since = "1.0.0")]
 // FIXME:
 // `OsStr::from_inner` current implementation relies

std/src/path.rs

@@ -1720,6 +1720,7 @@ impl AsRef<OsStr> for PathBuf {
 /// let extension = path.extension();
 /// assert_eq!(extension, Some(OsStr::new("txt")));
 /// ```
+#[cfg_attr(not(test), rustc_diagnostic_item = "Path")]
 #[stable(feature = "rust1", since = "1.0.0")]
 // FIXME:
 // `Path::new` current implementation relies