Export of internal Abseil changes

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0c8282d75798c77733eee6167870bcc6acc0bfc1 by Evan Brown <ezb@google.com>:

Provide mutable access to the key in node handles using std::launder when compiled with C++17 or later.

Also, document why we can't provide mutable access to the key without C++17.

Note: we use Policy::mutable_key() because btree already uses Policy::key() internally to get const key access, and we want to avoid calling std::launder unless we need mutable access to the key.
PiperOrigin-RevId: 326519000

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8018d0c3044400f0a731b0d2d00b606742c98818 by Xiaoyi Zhang <zhangxy@google.com>:

Move `Status` internal symbols from the public header into an internal header file.

PiperOrigin-RevId: 326471847

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87a7644864ba7c003b0611898aaba1b71c840376 by Abseil Team <absl-team@google.com>:

Avoid a costly divide (the division accounts for 10% of the time spent in the function).

When the division is signed, the compiler has to generate a div. When it is unsigned, it can generate a shift: https://godbolt.org/z/vGfTv4. As per the test above the div, we know that the value is unsigned.

PiperOrigin-RevId: 326453275
GitOrigin-RevId: 0c8282d75798c77733eee6167870bcc6acc0bfc1
Change-Id: I0a953558358055ab3dc6a533d8930698509b1195

1 files changed, 1 insertions, 21 deletions

diff --git a/absl/status/status.h b/absl/status/status.h
index 42530621..8097b05a 100644
--- a/absl/status/status.h
+++ b/absl/status/status.h
@@ -18,6 +18,7 @@
 #include <string>
 
 #include "absl/container/inlined_vector.h"
+#include "absl/status/internal/status_internal.h"
 #include "absl/strings/cord.h"
 #include "absl/types/optional.h"
 
@@ -164,27 +165,6 @@ std::string StatusCodeToString(StatusCode code);
 // Streams StatusCodeToString(code) to `os`.
 std::ostream& operator<<(std::ostream& os, StatusCode code);
 
-namespace status_internal {
-
-// Container for status payloads.
-struct Payload {
-  std::string type_url;
-  absl::Cord payload;
-};
-
-using Payloads = absl::InlinedVector<Payload, 1>;
-
-// Reference-counted representation of Status data.
-struct StatusRep {
-  std::atomic<int32_t> ref;
-  absl::StatusCode code;
-  std::string message;
-  std::unique_ptr<status_internal::Payloads> payloads;
-};
-
-absl::StatusCode MapToLocalCode(int value);
-}  // namespace status_internal
-
 class ABSL_MUST_USE_RESULT Status final {
  public:
   // Creates an OK status with no message or payload.