Deprecate `ABSL_ATTRIBUTE_NORETURN` in favor of the `[[noreturn]]`

standardized in C++11

Migrate all Abseil code to `[[noreturn]]`. Notably,
https://github.com/abseil/abseil-cpp/issues/1698 reports that
`[[noreturn]]` works better here.

We can't migrate `ABSL_ATTRIBUTE_NORETURN` to use `[[noreturn]]`
because the difference in accepted attribute placement
breaks some code.

PiperOrigin-RevId: 648395324
Change-Id: Icd3e9b837aac25f128e8994de099f1edb3cabccf

absl/base/attributes.h

@@ -195,6 +195,9 @@
 // ABSL_ATTRIBUTE_NORETURN
 //
 // Tells the compiler that a given function never returns.
+//
+// Deprecated: Prefer the `[[noreturn]]` attribute standardized by C++11 over
+// this macro.
 #if ABSL_HAVE_ATTRIBUTE(noreturn) || (defined(__GNUC__) && !defined(__clang__))
 #define ABSL_ATTRIBUTE_NORETURN __attribute__((noreturn))
 #elif defined(_MSC_VER)

absl/log/die_if_null.h

@@ -55,7 +55,7 @@ namespace log_internal {
 // `line` location. Called when `ABSL_DIE_IF_NULL` fails. Calling this function
 // generates less code than its implementation would if inlined, for a slight
 // code size reduction each time `ABSL_DIE_IF_NULL` is called.
-ABSL_ATTRIBUTE_NORETURN ABSL_ATTRIBUTE_NOINLINE void DieBecauseNull(
+[[noreturn]] ABSL_ATTRIBUTE_NOINLINE void DieBecauseNull(
     const char* file, int line, const char* exprtext);
 
 // Helper for `ABSL_DIE_IF_NULL`.

absl/log/internal/conditions.h

@@ -230,8 +230,8 @@ class LogEveryNSecState final {
 
 // Helper routines to abort the application quietly
 
-ABSL_ATTRIBUTE_NORETURN inline void AbortQuietly() { abort(); }
-ABSL_ATTRIBUTE_NORETURN inline void ExitQuietly() { _exit(1); }
+[[noreturn]] inline void AbortQuietly() { abort(); }
+[[noreturn]] inline void ExitQuietly() { _exit(1); }
 }  // namespace log_internal
 ABSL_NAMESPACE_END
 }  // namespace absl

absl/log/internal/log_message.h

@@ -187,11 +187,11 @@ class LogMessage {
  protected:
   // Call `abort()` or similar to perform `LOG(FATAL)` crash.  It is assumed
   // that the caller has already generated and written the trace as appropriate.
-  ABSL_ATTRIBUTE_NORETURN static void FailWithoutStackTrace();
+  [[noreturn]] static void FailWithoutStackTrace();
 
   // Similar to `FailWithoutStackTrace()`, but without `abort()`.  Terminates
   // the process with an error exit code.
-  ABSL_ATTRIBUTE_NORETURN static void FailQuietly();
+  [[noreturn]] static void FailQuietly();
 
   // Dispatches the completed `absl::LogEntry` to applicable `absl::LogSink`s.
   // This might as well be inlined into `~LogMessage` except that
@@ -354,7 +354,7 @@ class LogMessageFatal final : public LogMessage {
   LogMessageFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
   LogMessageFatal(const char* file, int line,
                   absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
-  ABSL_ATTRIBUTE_NORETURN ~LogMessageFatal();
+  [[noreturn]] ~LogMessageFatal();
 };
 
 // `LogMessageDebugFatal` ensures the process will exit in failure after logging
@@ -381,7 +381,7 @@ class LogMessageQuietlyFatal final : public LogMessage {
   LogMessageQuietlyFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
   LogMessageQuietlyFatal(const char* file, int line,
                          absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
-  ABSL_ATTRIBUTE_NORETURN ~LogMessageQuietlyFatal();
+  [[noreturn]] ~LogMessageQuietlyFatal();
 };
 
 }  // namespace log_internal

absl/log/internal/nullstream.h

@@ -117,16 +117,7 @@ class NullStreamMaybeFatal final : public NullStream {
 class NullStreamFatal final : public NullStream {
  public:
   NullStreamFatal() = default;
-  // ABSL_ATTRIBUTE_NORETURN doesn't seem to work on destructors with msvc, so
-  // disable msvc's warning about the d'tor never returning.
-#if defined(_MSC_VER) && !defined(__clang__)
-#pragma warning(push)
-#pragma warning(disable : 4722)
-#endif
-  ABSL_ATTRIBUTE_NORETURN ~NullStreamFatal() { _exit(1); }
-#if defined(_MSC_VER) && !defined(__clang__)
-#pragma warning(pop)
-#endif
+  [[noreturn]] ~NullStreamFatal() { _exit(1); }
 };
 
 }  // namespace log_internal

absl/status/internal/statusor_internal.h

@@ -186,7 +186,7 @@ class Helper {
  public:
   // Move type-agnostic error handling to the .cc.
   static void HandleInvalidStatusCtorArg(absl::Nonnull<Status*>);
-  ABSL_ATTRIBUTE_NORETURN static void Crash(const absl::Status& status);
+  [[noreturn]] static void Crash(const absl::Status& status);
 };
 
 // Construct an instance of T in `p` through placement new, passing Args... to
@@ -438,7 +438,7 @@ struct MoveAssignBase<T, false> {
   MoveAssignBase& operator=(MoveAssignBase&&) = delete;
 };
 
-ABSL_ATTRIBUTE_NORETURN void ThrowBadStatusOrAccess(absl::Status status);
+[[noreturn]] void ThrowBadStatusOrAccess(absl::Status status);
 
 // Used to introduce jitter into the output of printing functions for
 // `StatusOr` (i.e. `AbslStringify` and `operator<<`).

absl/strings/internal/cord_internal.h

@@ -85,7 +85,7 @@ enum Constants {
 };
 
 // Emits a fatal error "Unexpected node type: xyz" and aborts the program.
-ABSL_ATTRIBUTE_NORETURN void LogFatalNodeType(CordRep* rep);
+[[noreturn]] void LogFatalNodeType(CordRep* rep);
 
 // Fast implementation of memmove for up to 15 bytes. This implementation is
 // safe for overlapping regions. If nullify_tail is true, the destination is