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-// Copyright 2017 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_BASE_LOG_SEVERITY_H_
-#define ABSL_BASE_LOG_SEVERITY_H_
-
-#include <array>
-#include <ostream>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::LogSeverity
-//
-// Four severity levels are defined. Logging APIs should terminate the program
-// when a message is logged at severity `kFatal`; the other levels have no
-// special semantics.
-//
-// Values other than the four defined levels (e.g. produced by `static_cast`)
-// are valid, but their semantics when passed to a function, macro, or flag
-// depend on the function, macro, or flag. The usual behavior is to normalize
-// such values to a defined severity level, however in some cases values other
-// than the defined levels are useful for comparison.
-//
-// Exmaple:
-//
-//   // Effectively disables all logging:
-//   SetMinLogLevel(static_cast<absl::LogSeverity>(100));
-//
-// Abseil flags may be defined with type `LogSeverity`. Dependency layering
-// constraints require that the `AbslParseFlag()` overload be declared and
-// defined in the flags library itself rather than here. The `AbslUnparseFlag()`
-// overload is defined there as well for consistency.
-//
-// absl::LogSeverity Flag String Representation
-//
-// An `absl::LogSeverity` has a string representation used for parsing
-// command-line flags based on the enumerator name (e.g. `kFatal`) or
-// its unprefixed name (without the `k`) in any case-insensitive form. (E.g.
-// "FATAL", "fatal" or "Fatal" are all valid.) Unparsing such flags produces an
-// unprefixed string representation in all caps (e.g. "FATAL") or an integer.
-//
-// Additionally, the parser accepts arbitrary integers (as if the type were
-// `int`).
-//
-// Examples:
-//
-//   --my_log_level=kInfo
-//   --my_log_level=INFO
-//   --my_log_level=info
-//   --my_log_level=0
-//
-// Unparsing a flag produces the same result as `absl::LogSeverityName()` for
-// the standard levels and a base-ten integer otherwise.
-enum class LogSeverity : int {
-  kInfo = 0,
-  kWarning = 1,
-  kError = 2,
-  kFatal = 3,
-};
-
-// LogSeverities()
-//
-// Returns an iterable of all standard `absl::LogSeverity` values, ordered from
-// least to most severe.
-constexpr std::array<absl::LogSeverity, 4> LogSeverities() {
-  return {{absl::LogSeverity::kInfo, absl::LogSeverity::kWarning,
-           absl::LogSeverity::kError, absl::LogSeverity::kFatal}};
-}
-
-// LogSeverityName()
-//
-// Returns the all-caps string representation (e.g. "INFO") of the specified
-// severity level if it is one of the standard levels and "UNKNOWN" otherwise.
-constexpr const char* LogSeverityName(absl::LogSeverity s) {
-  return s == absl::LogSeverity::kInfo
-             ? "INFO"
-             : s == absl::LogSeverity::kWarning
-                   ? "WARNING"
-                   : s == absl::LogSeverity::kError
-                         ? "ERROR"
-                         : s == absl::LogSeverity::kFatal ? "FATAL" : "UNKNOWN";
-}
-
-// NormalizeLogSeverity()
-//
-// Values less than `kInfo` normalize to `kInfo`; values greater than `kFatal`
-// normalize to `kError` (**NOT** `kFatal`).
-constexpr absl::LogSeverity NormalizeLogSeverity(absl::LogSeverity s) {
-  return s < absl::LogSeverity::kInfo
-             ? absl::LogSeverity::kInfo
-             : s > absl::LogSeverity::kFatal ? absl::LogSeverity::kError : s;
-}
-constexpr absl::LogSeverity NormalizeLogSeverity(int s) {
-  return absl::NormalizeLogSeverity(static_cast<absl::LogSeverity>(s));
-}
-
-// operator<<
-//
-// The exact representation of a streamed `absl::LogSeverity` is deliberately
-// unspecified; do not rely on it.
-std::ostream& operator<<(std::ostream& os, absl::LogSeverity s);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_LOG_SEVERITY_H_