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authorAbseil Team <absl-team@google.com>2019-12-19T20·03-0800
committerCJ Johnson <johnsoncj@google.com>2019-12-19T20·40-0500
commitad904b6cd3906ddf79878003d92b7bc08d7786ae (patch)
treef30a1740ab8e8b7c3ea37e6d0cb94bfd820b72e7 /absl/flags/internal/flag.h
parent7bd1935dcbaf08701798d17fe408c960adec2da4 (diff)
Export of internal Abseil changes
--
24162e64040e89f174531fa78fc0ff43c3a67da4 by Abseil Team <absl-team@google.com>:

Make ABSL_RETIRED_FLAG behave consistently with ABSL_FLAG.

Before the change:
ABSL_RETIRED_FLAG does not compile when there are competing ctors in the type, even when ABSL_FLAG does.

After the change:
ABSL_RETIRED_FLAG compiles when ABSL_FLAG does.

PiperOrigin-RevId: 286437395

--
870d4cb4d114813e9cefe30d26d020b0fdcdc4b4 by Tom Manshreck <shreck@google.com>:

Add docs on bind_front

PiperOrigin-RevId: 286433540

--
b0c328bd9bb64e0382f942f93b85054229dafeac by Tom Manshreck <shreck@google.com>:

Specify the format for LogSeverity flags

PiperOrigin-RevId: 286402811
GitOrigin-RevId: 24162e64040e89f174531fa78fc0ff43c3a67da4
Change-Id: I89785145d049fee49c6b9cf3357893ece9a6231c
Diffstat (limited to 'absl/flags/internal/flag.h')
-rw-r--r--absl/flags/internal/flag.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index 20de406f4615..21a10c7f85f8 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -416,6 +416,20 @@ T* MakeFromDefaultValue(EmptyBraces) {
   return new T;
 }
 
+// MakeFromDefaultValueOrEmpty is basically the same as MakeFromDefaultValue. It
+// also allows for empty macro parameter (hence no argument), which was somehow
+// widely used for ABSL_RETIRED_FLAG().
+
+template <typename T>
+T* MakeFromDefaultValueOrEmpty(T t) {
+  return MakeFromDefaultValue(std::move(t));
+}
+
+template <typename T>
+T* MakeFromDefaultValueOrEmpty() {
+  return MakeFromDefaultValue<T>(EmptyBraces());
+}
+
 }  // namespace flags_internal
 ABSL_NAMESPACE_END
 }  // namespace absl