[absl] Rename `absl::internal::identity` to `absl::internal::type_identity`

* Also does this for `absl::internal::identity_t` which is now `absl::internal::type_identity_t`
* This is clearer naming as this is a backfill of `std::type_identity` (the identity type), and not `std::identity` (the identity function)

PiperOrigin-RevId: 594316002
Change-Id: I5fb8cf7e3d07c1bc736cbecd202e7d556b6ea33e

1 files changed, 3 insertions, 3 deletions

diff --git a/absl/types/internal/variant.h b/absl/types/internal/variant.h
index fc8829e5..263d7b09 100644
--- a/absl/types/internal/variant.h
+++ b/absl/types/internal/variant.h
@@ -1047,11 +1047,11 @@ class VariantStateBase {
   std::size_t index_;
 };
 
-using absl::internal::identity;
+using absl::internal::type_identity;
 
 // OverloadSet::Overload() is a unary function which is overloaded to
 // take any of the element types of the variant, by reference-to-const.
-// The return type of the overload on T is identity<T>, so that you
+// The return type of the overload on T is type_identity<T>, so that you
 // can statically determine which overload was called.
 //
 // Overload() is not defined, so it can only be called in unevaluated
@@ -1062,7 +1062,7 @@ struct OverloadSet;
 template <typename T, typename... Ts>
 struct OverloadSet<T, Ts...> : OverloadSet<Ts...> {
   using Base = OverloadSet<Ts...>;
-  static identity<T> Overload(const T&);
+  static type_identity<T> Overload(const T&);
   using Base::Overload;
 };