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Export of internal Abseil changes

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cf6037b985b629c253b8a87e4408c88a61baf89a by Abseil Team <absl-team@google.com>:

Adds an example of using ABSL_DEPRECATED on a template.
Without this, it's unclear where to add this annotation (e.g. before template <> or after it).

PiperOrigin-RevId: 270057224

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c53bc14dd683cc1e41c940a337001b42a0270eaf by Andy Getzendanner <durandal@google.com>:

Parser and unparser for command-line flags of type absl::LogSeverity.

PiperOrigin-RevId: 269939999

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d91174b02f3b213f0b26701d9d97c79f809e6fea by Abseil Team <absl-team@google.com>:

Fix a typo.

PiperOrigin-RevId: 269738777
GitOrigin-RevId: cf6037b985b629c253b8a87e4408c88a61baf89a
Change-Id: I6cec3101014e4c77f4ff2edb4c91740982dbb459
This commit is contained in:
Abseil Team 2019-09-19 09:27:34 -07:00 • committed by Shaindel Schwartz
parent 6ec1362810
commit ddf8e52a29
9 changed files with 234 additions and 38 deletions
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17
absl/base/log_severity.h
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@ -25,6 +25,19 @@ namespace absl {
// 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.
//
// Abseil flags may be defined with type `LogSeverity`. Dependency layering
// constraints require that the `AbslParseFlag` overload be declared and defined
// in the flags module rather than here. The `AbslUnparseFlag` overload is
// defined there too for consistency.
//
// The parser accepts arbitrary integers (as if the type were `int`). It also
// accepts each named enumerator, without regard for case, with or without the
// leading 'k'. For example: "kInfo", "INFO", and "info" all parse to the value
// `absl::LogSeverity::kInfo`.
//
// 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,
@ -40,7 +53,7 @@ constexpr std::array<absl::LogSeverity, 4> LogSeverities() {
}
// Returns the all-caps string representation (e.g. "INFO") of the specified
// severity level if it is one of the normal levels and "UNKNOWN" otherwise.
// 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"
@ -59,7 +72,7 @@ constexpr absl::LogSeverity NormalizeLogSeverity(absl::LogSeverity s) {
: s > absl::LogSeverity::kFatal ? absl::LogSeverity::kError : s;
}
constexpr absl::LogSeverity NormalizeLogSeverity(int s) {
return NormalizeLogSeverity(static_cast<absl::LogSeverity>(s));
return absl::NormalizeLogSeverity(static_cast<absl::LogSeverity>(s));
}
// The exact representation of a streamed `absl::LogSeverity` is deliberately