/// [`Into`]: trait.Into.html
/// [`from`]: trait.From.html#tymethod.from
/// [book]: ../../book/ch09-00-error-handling.html
+#[rustc_diagnostic_item = "from_trait"]
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_on_unimplemented(on(
all(_Self = "&str", T = "std::string::String"),