Export of internal Abseil changes

--
6a60bc6c79a3069f49986c2567dd51d2792f8ec1 by Abseil Team <absl-team@google.com>:

Internal cleanup

PiperOrigin-RevId: 311210039

--
a1049de1dd9071efa3a3dda1c3f25ab578b23e27 by Laramie Leavitt <lar@google.com>:

Internal change

PiperOrigin-RevId: 311188627

--
c2ccddd1cd89ef9d79c35bbe9e1813164db27031 by Matt Kulukundis <kfm@google.com>:

Migrate time parsing/formatting to string_view.

- make a copy before handing to cctz but handle local cases without

PiperOrigin-RevId: 311009254

--
d91d0cd68f3672a727ff76ee43f2da5226673d60 by Gennadiy Rozental <rogeeff@google.com>:

Eliminate public method absl::Flag<T>::IsSpecfiedOnCommandLine. This interface was never intended to be supported. Prefer to react to the current value of flag.

PiperOrigin-RevId: 310991916

--
8ad41e7ec24f43598ed232545314117802e7895c by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 310757743

--
f091f77a13ce9481218cb356f8b4ceb49c1530f9 by Jorg Brown <jorg@google.com>:

Change #include of <iostream> to <iosfwd> from absl/strings/cord.h

PiperOrigin-RevId: 310657413

--
39419418af6be4ac9b9204ebe2c7a92a6c3a0bc9 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 310615554
GitOrigin-RevId: 6a60bc6c79a3069f49986c2567dd51d2792f8ec1
Change-Id: I57dd35424269d67740272c4f88b2de54d8022cb2

7 files changed, 26 insertions, 27 deletions

diff --git a/absl/flags/internal/commandlineflag.h b/absl/flags/internal/commandlineflag.h
index 2d3b794d..0a7197b7 100644
--- a/absl/flags/internal/commandlineflag.h
+++ b/absl/flags/internal/commandlineflag.h
@@ -128,7 +128,6 @@ class CommandLineFlag {
   virtual std::string Help() const = 0;
   // Returns true iff this object corresponds to retired flag.
   virtual bool IsRetired() const;
-  virtual bool IsSpecifiedOnCommandLine() const = 0;
   virtual std::string DefaultValue() const = 0;
   virtual std::string CurrentValue() const = 0;
 
@@ -167,6 +166,10 @@ class CommandLineFlag {
   // the dst based on the current flag's value.
   virtual void Read(void* dst) const = 0;
 
+  // To be deleted. Used to return true if flag's current value originated from
+  // command line.
+  virtual bool IsSpecifiedOnCommandLine() const = 0;
+
   // Validates supplied value usign validator or parseflag routine
   virtual bool ValidateInputValue(absl::string_view value) const = 0;
 
diff --git a/absl/flags/internal/commandlineflag_test.cc b/absl/flags/internal/commandlineflag_test.cc
index 54d50fff..0b5aea37 100644
--- a/absl/flags/internal/commandlineflag_test.cc
+++ b/absl/flags/internal/commandlineflag_test.cc
@@ -121,42 +121,48 @@ TEST_F(CommandLineFlagTest, TestParseFromCurrentValue) {
   std::string err;
 
   auto* flag_01 = flags::FindCommandLineFlag("int_flag");
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "11", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 11);
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "-123", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
       &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "xyz", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
       &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
   EXPECT_EQ(err, "Illegal value 'xyz' specified for flag 'int_flag'");
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "A1", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
   EXPECT_EQ(err, "Illegal value 'A1' specified for flag 'int_flag'");
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "0x10", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
       &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 16);
-  EXPECT_FALSE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_FALSE(
+      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "011", flags::SET_FLAGS_VALUE, flags::kCommandLine, &err));
   EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 11);
-  EXPECT_TRUE(flag_01->IsSpecifiedOnCommandLine());
+  EXPECT_TRUE(flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
 
   EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
       flag_01, "", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, &err));
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index b060199e..146c3efc 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -624,6 +624,7 @@ class Flag {
   absl::string_view Name() const { return impl_.Name(); }
   std::string Filename() const { return impl_.Filename(); }
   std::string Help() const { return impl_.Help(); }
+  // Do not use. To be removed.
   bool IsSpecifiedOnCommandLine() const {
     return impl_.IsSpecifiedOnCommandLine();
   }
diff --git a/absl/flags/internal/private_handle_accessor.cc b/absl/flags/internal/private_handle_accessor.cc
index ec5776bb..64fe3166 100644
--- a/absl/flags/internal/private_handle_accessor.cc
+++ b/absl/flags/internal/private_handle_accessor.cc
@@ -28,6 +28,11 @@ std::unique_ptr<FlagStateInterface> PrivateHandleAccessor::SaveState(
   return flag->SaveState();
 }
 
+bool PrivateHandleAccessor::IsSpecifiedOnCommandLine(
+    const CommandLineFlag& flag) {
+  return flag.IsSpecifiedOnCommandLine();
+}
+
 bool PrivateHandleAccessor::ValidateInputValue(const CommandLineFlag& flag,
                                                absl::string_view value) {
   return flag.ValidateInputValue(value);
diff --git a/absl/flags/internal/private_handle_accessor.h b/absl/flags/internal/private_handle_accessor.h
index fbb4409c..40591de4 100644
--- a/absl/flags/internal/private_handle_accessor.h
+++ b/absl/flags/internal/private_handle_accessor.h
@@ -33,6 +33,9 @@ class PrivateHandleAccessor {
   // Access to CommandLineFlag::SaveState.
   static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag* flag);
 
+  // Access to CommandLineFlag::IsSpecifiedOnCommandLine.
+  static bool IsSpecifiedOnCommandLine(const CommandLineFlag& flag);
+
   // Access to CommandLineFlag::ValidateInputValue.
   static bool ValidateInputValue(const CommandLineFlag& flag,
                                  absl::string_view value);
diff --git a/absl/flags/internal/type_erased.cc b/absl/flags/internal/type_erased.cc
index 3cfc9b2d..c13fb9b0 100644
--- a/absl/flags/internal/type_erased.cc
+++ b/absl/flags/internal/type_erased.cc
@@ -81,14 +81,6 @@ bool IsValidFlagValue(absl::string_view name, absl::string_view value) {
 
 // --------------------------------------------------------------------
 
-bool SpecifiedOnCommandLine(absl::string_view name) {
-  CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
-  if (flag != nullptr && !flag->IsRetired()) {
-    return flag->IsSpecifiedOnCommandLine();
-  }
-  return false;
-}
-
 }  // namespace flags_internal
 ABSL_NAMESPACE_END
 }  // namespace absl
diff --git a/absl/flags/internal/type_erased.h b/absl/flags/internal/type_erased.h
index ffe319ba..b43a0ff7 100644
--- a/absl/flags/internal/type_erased.h
+++ b/absl/flags/internal/type_erased.h
@@ -55,17 +55,6 @@ bool IsValidFlagValue(absl::string_view name, absl::string_view value);
 
 //-----------------------------------------------------------------------------
 
-// Returns true iff a flag named "name" was specified on the command line
-// (either directly, or via one of --flagfile or --fromenv or --tryfromenv).
-//
-// Any non-command-line modification of the flag does not affect the
-// result of this function.  So for example, if a flag was passed on
-// the command line but then reset via SET_FLAGS_DEFAULT, this
-// function will still return true.
-bool SpecifiedOnCommandLine(absl::string_view name);
-
-//-----------------------------------------------------------------------------
-
 // If a flag with specified "name" exists and has type T, store
 // its current value in *dst and return true.  Else return false
 // without touching *dst.  T must obey all of the requirements for