Remove #[cfg(not(test))] gates in core

These gates unnecessary now that unit tests for `core` are in a separate
package, `coretests`, instead of in the same files as the source code.

Author: thaliaarchi

library/core/src/any.rs

@@ -109,7 +109,7 @@ use crate::{fmt, hash, intrinsics};
 // unsafe traits and unsafe methods (i.e., `type_id` would still be safe to call,
 // but we would likely want to indicate as such in documentation).
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "Any")]
+#[rustc_diagnostic_item = "Any"]
 pub trait Any: 'static {
     /// Gets the `TypeId` of `self`.
     ///

library/core/src/array/ascii.rs

@@ -1,6 +1,5 @@
 use crate::ascii;
 
-#[cfg(not(test))]
 impl<const N: usize> [u8; N] {
     /// Converts this array of bytes into an array of ASCII characters,
     /// or returns `None` if any of the characters is non-ASCII.

library/core/src/bool.rs

@@ -56,7 +56,7 @@ impl bool {
     /// ```
     #[doc(alias = "then_with")]
     #[stable(feature = "lazy_bool_to_option", since = "1.50.0")]
-    #[cfg_attr(not(test), rustc_diagnostic_item = "bool_then")]
+    #[rustc_diagnostic_item = "bool_then"]
     #[inline]
     pub fn then<T, F: FnOnce() -> T>(self, f: F) -> Option<T> {
         if self { Some(f()) } else { None }

library/core/src/cell.rs

@@ -304,7 +304,7 @@ pub use once::OnceCell;
 /// ```
 ///
 /// See the [module-level documentation](self) for more.
-#[cfg_attr(not(test), rustc_diagnostic_item = "Cell")]
+#[rustc_diagnostic_item = "Cell"]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[repr(transparent)]
 #[rustc_pub_transparent]
@@ -725,7 +725,7 @@ impl<T, const N: usize> Cell<[T; N]> {
 /// A mutable memory location with dynamically checked borrow rules
 ///
 /// See the [module-level documentation](self) for more.
-#[cfg_attr(not(test), rustc_diagnostic_item = "RefCell")]
+#[rustc_diagnostic_item = "RefCell"]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RefCell<T: ?Sized> {
     borrow: Cell<BorrowFlag>,

library/core/src/char/methods.rs

@@ -1178,7 +1178,7 @@ impl char {
     #[must_use]
     #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
     #[rustc_const_stable(feature = "const_char_is_ascii", since = "1.32.0")]
-    #[cfg_attr(not(test), rustc_diagnostic_item = "char_is_ascii")]
+    #[rustc_diagnostic_item = "char_is_ascii"]
     #[inline]
     pub const fn is_ascii(&self) -> bool {
         *self as u32 <= 0x7F

library/core/src/cmp.rs

@@ -1471,7 +1471,7 @@ pub macro PartialOrd($item:item) {
 #[inline]
 #[must_use]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "cmp_min")]
+#[rustc_diagnostic_item = "cmp_min"]
 pub fn min<T: Ord>(v1: T, v2: T) -> T {
     v1.min(v2)
 }
@@ -1563,7 +1563,7 @@ pub fn min_by_key<T, F: FnMut(&T) -> K, K: Ord>(v1: T, v2: T, mut f: F) -> T {
 #[inline]
 #[must_use]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "cmp_max")]
+#[rustc_diagnostic_item = "cmp_max"]
 pub fn max<T: Ord>(v1: T, v2: T) -> T {
     v1.max(v2)
 }

library/core/src/convert/mod.rs

@@ -214,7 +214,7 @@ pub const fn identity<T>(x: T) -> T {
 /// is_hello(s);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "AsRef")]
+#[rustc_diagnostic_item = "AsRef"]
 pub trait AsRef<T: ?Sized> {
     /// Converts this type into a shared reference of the (usually inferred) input type.
     #[stable(feature = "rust1", since = "1.0.0")]
@@ -365,7 +365,7 @@ pub trait AsRef<T: ?Sized> {
 /// Note, however, that APIs don't need to be generic. In many cases taking a `&mut [u8]` or
 /// `&mut Vec<u8>`, for example, is the better choice (callers need to pass the correct type then).
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "AsMut")]
+#[rustc_diagnostic_item = "AsMut"]
 pub trait AsMut<T: ?Sized> {
     /// Converts this type into a mutable reference of the (usually inferred) input type.
     #[stable(feature = "rust1", since = "1.0.0")]

library/core/src/default.rs

@@ -101,7 +101,7 @@ use crate::ascii::Char as AsciiChar;
 ///     bar: f32,
 /// }
 /// ```
-#[cfg_attr(not(test), rustc_diagnostic_item = "Default")]
+#[rustc_diagnostic_item = "Default"]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_trivial_field_reads]
 pub trait Default: Sized {

library/core/src/error.rs

@@ -47,7 +47,7 @@ use crate::fmt::{self, Debug, Display, Formatter};
 /// impl Error for ReadConfigError {}
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "Error")]
+#[rustc_diagnostic_item = "Error"]
 #[rustc_has_incoherent_inherent_impls]
 #[allow(multiple_supertrait_upcastable)]
 pub trait Error: Debug + Display {

library/core/src/fmt/mod.rs

@@ -18,7 +18,7 @@ mod num;
 mod rt;
 
 #[stable(feature = "fmt_flags_align", since = "1.28.0")]
-#[cfg_attr(not(test), rustc_diagnostic_item = "Alignment")]
+#[rustc_diagnostic_item = "Alignment"]
 /// Possible alignments returned by `Formatter::align`
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Alignment {