Export of internal Abseil changes

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bffb14058bb46137d42c7a113a36b6b582997cda by Xiaoyi Zhang <zhangxy@google.com>:

Add ABSL_MUST_USE_RESULT to Status.

PiperOrigin-RevId: 296272498

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b426fdd3b3f687d7a8aeb644925923bbab503778 by CJ Johnson <johnsoncj@google.com>:

Optimizes absl::InlinedVector::clear() by not deallocating the data, if allocated. This allows allocations to be reused.

This matches the behavior of std::vector::clear()

PiperOrigin-RevId: 296197235

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8cb9fbfe20e749816065c1a042e84f72dac9bfc0 by CJ Johnson <johnsoncj@google.com>:

Optimizes absl::InlinedVector::clear() by not deallocating the data, if allocated. This allows allocations to be reused.

This matches the behavior of std::vector::clear()

PiperOrigin-RevId: 296058092

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2558d3369a482879919155b6f46317ccafe0ca13 by Matthew Brown <matthewbr@google.com>:

Internal cleanup

PiperOrigin-RevId: 296025806

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cf7ee57228534021c15ed7421df92acf6c27c9c7 by Gennadiy Rozental <rogeeff@google.com>:

Make FlagOps enum class.

We also add comments to all the functions used to invoke flag ops.

PiperOrigin-RevId: 295975809

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74bbdbd12fbc54e9c4ebcb3005e727becf0e509d by Xiaoyi Zhang <zhangxy@google.com>:

Release `absl::Status`.

PiperOrigin-RevId: 295777662

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3dbc622b4e2227863525da2f7de7ecbeb3ede21f by Xiaoyi Zhang <zhangxy@google.com>:

Internal change.

PiperOrigin-RevId: 295733658

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48d74aa0ab01d611da6012b377f038d8b26c712e by Abseil Team <absl-team@google.com>:

Fix typo in container/CMakeLists.txt for container_common

PiperOrigin-RevId: 295491438
GitOrigin-RevId: bffb14058bb46137d42c7a113a36b6b582997cda
Change-Id: Ia966857b07fa7412cd6489ac37b5fa26640e4141

absl/status/status_payload_printer.h

@@ -0,0 +1,51 @@
+// Copyright 2019 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
+#define ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
+
+#include <string>
+
+#include "absl/strings/cord.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace status_internal {
+
+// By default, `Status::ToString` and `operator<<(Status)` print a payload by
+// dumping the type URL and the raw bytes. To help debugging, we provide an
+// extension point, which is a global printer function that can be set by users
+// to specify how to print payloads. The function takes the type URL and the
+// payload as input, and should return a valid human-readable string on success
+// or `absl::nullopt` on failure (in which case it falls back to the default
+// approach of printing the raw bytes).
+// NOTE: This is an internal API and the design is subject to change in the
+// future in a non-backward-compatible way. Since it's only meant for debugging
+// purpose, you should not rely on it in any critical logic.
+using StatusPayloadPrinter = absl::optional<std::string> (*)(absl::string_view,
+                                                             const absl::Cord&);
+
+// Sets the global payload printer. Only one printer should be set per process.
+// If multiple printers are set, it's undefined which one will be used.
+void SetStatusPayloadPrinter(StatusPayloadPrinter);
+
+// Returns the global payload printer if previously set, otherwise `nullptr`.
+StatusPayloadPrinter GetStatusPayloadPrinter();
+
+}  // namespace status_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_