Export of internal Abseil changes

--
228b5878d7a994656f383666cfaee34e33e0b09b by Abseil Team <absl-team@google.com>:

Add element_type typedef to match std::span<T>

PiperOrigin-RevId: 390186160

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c91d96c88c60be793c525158f76dfcaa5e32d161 by Abseil Team <absl-team@google.com>:

Rollback change to only hide retired flags if human-readable output
is requested

PiperOrigin-RevId: 390183146

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170192c10ef8d513de80f29298ce93eeccc3712c by Abseil Team <absl-team@google.com>:

Move alignas(16) before ABSL_CONST_INIT and ABSL_DLL.

PiperOrigin-RevId: 390182845

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77a5ee5081c81cef625fac7bbcf993cc028b32ed by Evan Brown <ezb@google.com>:

Use simple SlotOffset and AllocSize logic instead of container_internal::Layout in order to save linker input size for non-opt and sanitizer builds.

In opt mode, all of this logic is inlined so we don't save linker input size in opt mode.

PiperOrigin-RevId: 389914594
GitOrigin-RevId: 228b5878d7a994656f383666cfaee34e33e0b09b
Change-Id: I3b904068687574931d8390071b322c0c3c083283

1 files changed, 4 insertions, 13 deletions

diff --git a/absl/flags/internal/usage.cc b/absl/flags/internal/usage.cc
index a883567f..949709e8 100644
--- a/absl/flags/internal/usage.cc
+++ b/absl/flags/internal/usage.cc
@@ -17,7 +17,6 @@
 
 #include <stdint.h>
 
-#include <algorithm>
 #include <functional>
 #include <map>
 #include <ostream>
@@ -256,6 +255,9 @@ void FlagsHelpImpl(std::ostream& out, PerFlagFilter filter_cb,
       matching_flags;
 
   flags_internal::ForEachFlag([&](absl::CommandLineFlag& flag) {
+    // Ignore retired flags.
+    if (flag.IsRetired()) return;
+
     // If the flag has been stripped, pretend that it doesn't exist.
     if (flag.Help() == flags_internal::kStrippedFlagHelp) return;
 
@@ -273,14 +275,6 @@ void FlagsHelpImpl(std::ostream& out, PerFlagFilter filter_cb,
   absl::string_view file_separator;     // controls blank lines between files
   for (auto& package : matching_flags) {
     if (format == HelpFormat::kHumanReadable) {
-      // Hide packages with only retired flags
-      bool all_package_flags_are_retired = true;
-      for (const auto& flags_in_file : package.second) {
-        for (const auto* flag : flags_in_file.second) {
-          all_package_flags_are_retired &= flag->IsRetired();
-        }
-      }
-      if (all_package_flags_are_retired) continue;
       out << package_separator;
       package_separator = "\n\n";
     }
@@ -340,11 +334,8 @@ void FlagsHelpImpl(std::ostream& out,
 // Produces the help message describing specific flag.
 void FlagHelp(std::ostream& out, const CommandLineFlag& flag,
               HelpFormat format) {
-  if (format == HelpFormat::kHumanReadable) {
-    // Ignore retired flags
-    if (flag.IsRetired()) return;
+  if (format == HelpFormat::kHumanReadable)
     flags_internal::FlagHelpHumanReadable(flag, out);
-  }
 }
 
 // --------------------------------------------------------------------