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Diffstat (limited to 'third_party/abseil_cpp/absl/status/status_payload_printer.h')
-rw-r--r-- | third_party/abseil_cpp/absl/status/status_payload_printer.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/status/status_payload_printer.h b/third_party/abseil_cpp/absl/status/status_payload_printer.h new file mode 100644 index 000000000000..5e0937f67da8 --- /dev/null +++ b/third_party/abseil_cpp/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_ |