Export of internal Abseil changes

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692d3df279e7592d01c1008cb85f2a010c3d17da by Abseil Team <absl-team@google.com>:

Use EXPECT_DEATH_IF_SUPPORTED instead of raw EXPECT_DEATH.

PiperOrigin-RevId: 307802196

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ebc40936b677b79cad9f87f944794c35946f9dbd by Gennadiy Rozental <rogeeff@google.com>:

Eliminate SetCallback from absl::Flag<T> public interface.

We also make SetCallback on FlagRegistrar to return rvalue, so that we can add more tail calls after it.

PiperOrigin-RevId: 307745935
GitOrigin-RevId: 15f69a9dae9c70c884ce85ca1a4bf359a2609db0
Change-Id: Ibec13463e44e4071c48fb12389f47e716cee7a9d

5 files changed, 39 insertions, 38 deletions

diff --git a/absl/flags/flag.h b/absl/flags/flag.h
index 150615929b0f..194a9d314fc5 100644
--- a/absl/flags/flag.h
+++ b/absl/flags/flag.h
@@ -149,9 +149,6 @@ class Flag {
   }
   T Get() const { return GetImpl()->Get(); }
   void Set(const T& v) { GetImpl()->Set(v); }
-  void SetCallback(const flags_internal::FlagCallbackFunc mutation_callback) {
-    GetImpl()->SetCallback(mutation_callback);
-  }
   void InvokeCallback() { GetImpl()->InvokeCallback(); }
 
   // The data members are logically private, but they need to be public for
diff --git a/absl/flags/flag_test.cc b/absl/flags/flag_test.cc
index dbe94a2c3b62..6fa178f1f0b9 100644
--- a/absl/flags/flag_test.cc
+++ b/absl/flags/flag_test.cc
@@ -583,18 +583,21 @@ using FlagDeathTest = FlagTest;
 
 TEST_F(FlagDeathTest, TestTypeMismatchValidations) {
 #if !defined(NDEBUG)
-  EXPECT_DEATH(static_cast<void>(absl::GetFlag(FLAGS_mistyped_int_flag)),
-               "Flag 'mistyped_int_flag' is defined as one type and declared "
-               "as another");
-  EXPECT_DEATH(static_cast<void>(absl::GetFlag(FLAGS_mistyped_string_flag)),
-               "Flag 'mistyped_string_flag' is defined as one type and "
-               "declared as another");
+  EXPECT_DEATH_IF_SUPPORTED(
+      static_cast<void>(absl::GetFlag(FLAGS_mistyped_int_flag)),
+      "Flag 'mistyped_int_flag' is defined as one type and declared "
+      "as another");
+  EXPECT_DEATH_IF_SUPPORTED(
+      static_cast<void>(absl::GetFlag(FLAGS_mistyped_string_flag)),
+      "Flag 'mistyped_string_flag' is defined as one type and "
+      "declared as another");
 #endif
 
-  EXPECT_DEATH(absl::SetFlag(&FLAGS_mistyped_int_flag, 1),
-               "Flag 'mistyped_int_flag' is defined as one type and declared "
-               "as another");
-  EXPECT_DEATH(
+  EXPECT_DEATH_IF_SUPPORTED(
+      absl::SetFlag(&FLAGS_mistyped_int_flag, 1),
+      "Flag 'mistyped_int_flag' is defined as one type and declared "
+      "as another");
+  EXPECT_DEATH_IF_SUPPORTED(
       absl::SetFlag(&FLAGS_mistyped_string_flag, std::vector<std::string>{}),
       "Flag 'mistyped_string_flag' is defined as one type and declared as "
       "another");
diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h
index 2ae3dce3d13d..6da25aa9454a 100644
--- a/absl/flags/internal/flag.h
+++ b/absl/flags/internal/flag.h
@@ -556,9 +556,6 @@ class Flag {
     impl_.AssertValidType(base_internal::FastTypeId<T>(), &GenRuntimeTypeId<T>);
     impl_.Write(&v);
   }
-  void SetCallback(const FlagCallbackFunc mutation_callback) {
-    impl_.SetCallback(mutation_callback);
-  }
 
   // CommandLineFlag interface
   absl::string_view Name() const { return impl_.Name(); }
@@ -651,8 +648,8 @@ class FlagRegistrar {
     if (do_register) flags_internal::RegisterCommandLineFlag(&flag_->impl_);
   }
 
-  FlagRegistrar& OnUpdate(FlagCallbackFunc cb) && {
-    flag_->SetCallback(cb);
+  FlagRegistrar OnUpdate(FlagCallbackFunc cb) && {
+    flag_->impl_.SetCallback(cb);
     return *this;
   }
 
diff --git a/absl/flags/internal/usage_test.cc b/absl/flags/internal/usage_test.cc
index e1e57e557091..8dd3532e6d40 100644
--- a/absl/flags/internal/usage_test.cc
+++ b/absl/flags/internal/usage_test.cc
@@ -103,8 +103,9 @@ TEST_F(UsageReportingDeathTest, TestSetProgramUsageMessage) {
 
 #ifndef _WIN32
   // TODO(rogeeff): figure out why this does not work on Windows.
-  EXPECT_DEATH(absl::SetProgramUsageMessage("custom usage message"),
-               ".*SetProgramUsageMessage\\(\\) called twice.*");
+  EXPECT_DEATH_IF_SUPPORTED(
+      absl::SetProgramUsageMessage("custom usage message"),
+      ".*SetProgramUsageMessage\\(\\) called twice.*");
 #endif
 }
 
diff --git a/absl/flags/parse_test.cc b/absl/flags/parse_test.cc
index 6f49377a935d..065f757a6c9e 100644
--- a/absl/flags/parse_test.cc
+++ b/absl/flags/parse_test.cc
@@ -481,21 +481,22 @@ TEST_F(ParseDeathTest, TestUndefinedArg) {
       "testbin",
       "--undefined_flag",
   };
-  EXPECT_DEATH(InvokeParse(in_args1),
-               "Unknown command line flag 'undefined_flag'");
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
+                            "Unknown command line flag 'undefined_flag'");
 
   const char* in_args2[] = {
       "testbin",
       "--noprefixed_flag",
   };
-  EXPECT_DEATH(InvokeParse(in_args2),
-               "Unknown command line flag 'noprefixed_flag'");
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
+                            "Unknown command line flag 'noprefixed_flag'");
 
   const char* in_args3[] = {
       "testbin",
       "--Int_flag=1",
   };
-  EXPECT_DEATH(InvokeParse(in_args3), "Unknown command line flag 'Int_flag'");
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args3),
+                            "Unknown command line flag 'Int_flag'");
 }
 
 // --------------------------------------------------------------------
@@ -505,7 +506,7 @@ TEST_F(ParseDeathTest, TestInvalidBoolFlagFormat) {
       "testbin",
       "--bool_flag=",
   };
-  EXPECT_DEATH(
+  EXPECT_DEATH_IF_SUPPORTED(
       InvokeParse(in_args1),
       "Missing the value after assignment for the boolean flag 'bool_flag'");
 
@@ -513,7 +514,7 @@ TEST_F(ParseDeathTest, TestInvalidBoolFlagFormat) {
       "testbin",
       "--nobool_flag=true",
   };
-  EXPECT_DEATH(InvokeParse(in_args2),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
                "Negative form with assignment is not valid for the boolean "
                "flag 'bool_flag'");
 }
@@ -525,14 +526,14 @@ TEST_F(ParseDeathTest, TestInvalidNonBoolFlagFormat) {
       "testbin",
       "--nostring_flag",
   };
-  EXPECT_DEATH(InvokeParse(in_args1),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
                "Negative form is not valid for the flag 'string_flag'");
 
   const char* in_args2[] = {
       "testbin",
       "--int_flag",
   };
-  EXPECT_DEATH(InvokeParse(in_args2),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
                "Missing the value for the flag 'int_flag'");
 }
 
@@ -543,7 +544,7 @@ TEST_F(ParseDeathTest, TestInvalidUDTFlagFormat) {
       "testbin",
       "--udt_flag=1",
   };
-  EXPECT_DEATH(InvokeParse(in_args1),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
                "Illegal value '1' specified for flag 'udt_flag'; Use values A, "
                "AAA instead");
 
@@ -552,7 +553,7 @@ TEST_F(ParseDeathTest, TestInvalidUDTFlagFormat) {
       "--udt_flag",
       "AA",
   };
-  EXPECT_DEATH(InvokeParse(in_args2),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
                "Illegal value 'AA' specified for flag 'udt_flag'; Use values "
                "A, AAA instead");
 }
@@ -658,7 +659,7 @@ TEST_F(ParseDeathTest, TestInvalidFlagfiles) {
       GetFlagfileFlag({{"parse_test.ff4",
                         absl::MakeConstSpan(ff4_data)}}, &flagfile_flag),
   };
-  EXPECT_DEATH(InvokeParse(in_args1),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
                "Unknown command line flag 'unknown_flag'");
 
   constexpr const char* const ff5_data[] = {
@@ -670,7 +671,7 @@ TEST_F(ParseDeathTest, TestInvalidFlagfiles) {
       GetFlagfileFlag({{"parse_test.ff5",
                         absl::MakeConstSpan(ff5_data)}}, &flagfile_flag),
   };
-  EXPECT_DEATH(InvokeParse(in_args2),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
                "Unknown command line flag 'int_flag 10'");
 
   constexpr const char* const ff6_data[] = {
@@ -682,14 +683,15 @@ TEST_F(ParseDeathTest, TestInvalidFlagfiles) {
       GetFlagfileFlag({{"parse_test.ff6", absl::MakeConstSpan(ff6_data)}},
                       &flagfile_flag),
   };
-  EXPECT_DEATH(InvokeParse(in_args3),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args3),
                "Flagfile can't contain position arguments or --");
 
   const char* in_args4[] = {
       "testbin",
       "--flagfile=invalid_flag_file",
   };
-  EXPECT_DEATH(InvokeParse(in_args4), "Can't open flagfile invalid_flag_file");
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args4),
+                            "Can't open flagfile invalid_flag_file");
 
   constexpr const char* const ff7_data[] = {
       "--int_flag=10",
@@ -702,7 +704,7 @@ TEST_F(ParseDeathTest, TestInvalidFlagfiles) {
       GetFlagfileFlag({{"parse_test.ff7", absl::MakeConstSpan(ff7_data)}},
                       &flagfile_flag),
   };
-  EXPECT_DEATH(InvokeParse(in_args5),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args5),
                "Unexpected line in the flagfile .*: \\*bin\\*");
 }
 
@@ -724,7 +726,7 @@ TEST_F(ParseTest, TestReadingRequiredFlagsFromEnv) {
 TEST_F(ParseDeathTest, TestReadingUnsetRequiredFlagsFromEnv) {
   const char* in_args1[] = {"testbin", "--fromenv=int_flag"};
 
-  EXPECT_DEATH(InvokeParse(in_args1),
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
                "FLAGS_int_flag not found in environment");
 }
 
@@ -735,7 +737,8 @@ TEST_F(ParseDeathTest, TestRecursiveFlagsFromEnv) {
 
   ScopedSetEnv set_tryfromenv("FLAGS_tryfromenv", "int_flag");
 
-  EXPECT_DEATH(InvokeParse(in_args1), "Infinite recursion on flag tryfromenv");
+  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
+                            "Infinite recursion on flag tryfromenv");
 }
 
 // --------------------------------------------------------------------