diff options
35 files changed, 646 insertions, 440 deletions
diff --git a/absl/base/internal/spinlock.cc b/absl/base/internal/spinlock.cc index fd0c733e..7cac72f9 100644 --- a/absl/base/internal/spinlock.cc +++ b/absl/base/internal/spinlock.cc @@ -66,6 +66,13 @@ void RegisterSpinLockProfiler(void (*fn)(const void *contendedlock, submit_profile_data.Store(fn); } +// Static member variable definitions. +constexpr uint32_t SpinLock::kSpinLockHeld; +constexpr uint32_t SpinLock::kSpinLockCooperative; +constexpr uint32_t SpinLock::kSpinLockDisabledScheduling; +constexpr uint32_t SpinLock::kSpinLockSleeper; +constexpr uint32_t SpinLock::kWaitTimeMask; + // Uncommon constructors. SpinLock::SpinLock(base_internal::SchedulingMode mode) : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) { diff --git a/absl/base/internal/spinlock.h b/absl/base/internal/spinlock.h index 89e93aad..2b08a2d6 100644 --- a/absl/base/internal/spinlock.h +++ b/absl/base/internal/spinlock.h @@ -36,6 +36,7 @@ #include <atomic> #include "absl/base/attributes.h" +#include "absl/base/const_init.h" #include "absl/base/dynamic_annotations.h" #include "absl/base/internal/low_level_scheduling.h" #include "absl/base/internal/raw_logging.h" @@ -77,6 +78,10 @@ class ABSL_LOCKABLE SpinLock { SpinLock(base_internal::LinkerInitialized, base_internal::SchedulingMode mode); + // Constructor for global SpinLock instances. See absl/base/const_init.h. + constexpr SpinLock(absl::ConstInitType, base_internal::SchedulingMode mode) + : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) {} + ~SpinLock() { ABSL_TSAN_MUTEX_DESTROY(this, __tsan_mutex_not_static); } // Acquire this SpinLock. diff --git a/absl/base/internal/sysinfo.cc b/absl/base/internal/sysinfo.cc index c3f275ca..6c69683f 100644 --- a/absl/base/internal/sysinfo.cc +++ b/absl/base/internal/sysinfo.cc @@ -344,15 +344,16 @@ pid_t GetTID() { #else // Fallback implementation of GetTID using pthread_getspecific. -static once_flag tid_once; -static pthread_key_t tid_key; -static absl::base_internal::SpinLock tid_lock( - absl::base_internal::kLinkerInitialized); +ABSL_CONST_INIT static once_flag tid_once; +ABSL_CONST_INIT static pthread_key_t tid_key; +ABSL_CONST_INIT static absl::base_internal::SpinLock tid_lock( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); // We set a bit per thread in this array to indicate that an ID is in // use. ID 0 is unused because it is the default value returned by // pthread_getspecific(). -static std::vector<uint32_t>* tid_array ABSL_GUARDED_BY(tid_lock) = nullptr; +ABSL_CONST_INIT static std::vector<uint32_t> *tid_array + ABSL_GUARDED_BY(tid_lock) = nullptr; static constexpr int kBitsPerWord = 32; // tid_array is uint32_t. // Returns the TID to tid_array. diff --git a/absl/base/internal/thread_identity_test.cc b/absl/base/internal/thread_identity_test.cc index 3685779c..624d5b96 100644 --- a/absl/base/internal/thread_identity_test.cc +++ b/absl/base/internal/thread_identity_test.cc @@ -21,6 +21,7 @@ #include "absl/base/attributes.h" #include "absl/base/internal/spinlock.h" #include "absl/base/macros.h" +#include "absl/base/thread_annotations.h" #include "absl/synchronization/internal/per_thread_sem.h" #include "absl/synchronization/mutex.h" @@ -29,10 +30,9 @@ ABSL_NAMESPACE_BEGIN namespace base_internal { namespace { -// protects num_identities_reused -static absl::base_internal::SpinLock map_lock( - absl::base_internal::kLinkerInitialized); -static int num_identities_reused; +ABSL_CONST_INIT static absl::base_internal::SpinLock map_lock( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); +ABSL_CONST_INIT static int num_identities_reused ABSL_GUARDED_BY(map_lock); static const void* const kCheckNoIdentity = reinterpret_cast<void*>(1); @@ -90,6 +90,7 @@ TEST(ThreadIdentityTest, BasicIdentityWorksThreaded) { // We should have recycled ThreadIdentity objects above; while (external) // library threads allocating their own identities may preclude some // reuse, we should have sufficient repetitions to exclude this. + absl::base_internal::SpinLockHolder l(&map_lock); EXPECT_LT(kNumThreads, num_identities_reused); } diff --git a/absl/base/spinlock_test_common.cc b/absl/base/spinlock_test_common.cc index 08f61ba8..b68c51a1 100644 --- a/absl/base/spinlock_test_common.cc +++ b/absl/base/spinlock_test_common.cc @@ -56,12 +56,10 @@ namespace { static constexpr int kArrayLength = 10; static uint32_t values[kArrayLength]; -static SpinLock static_spinlock(base_internal::kLinkerInitialized); -static SpinLock static_cooperative_spinlock( - base_internal::kLinkerInitialized, - base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL); -static SpinLock static_noncooperative_spinlock( - base_internal::kLinkerInitialized, base_internal::SCHEDULE_KERNEL_ONLY); +ABSL_CONST_INIT static SpinLock static_cooperative_spinlock( + absl::kConstInit, base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL); +ABSL_CONST_INIT static SpinLock static_noncooperative_spinlock( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); // Simple integer hash function based on the public domain lookup2 hash. // http://burtleburtle.net/bob/c/lookup2.c @@ -191,10 +189,6 @@ TEST(SpinLock, WaitCyclesEncoding) { EXPECT_GT(expected_max_value_decoded, before_max_value_decoded); } -TEST(SpinLockWithThreads, StaticSpinLock) { - ThreadedTest(&static_spinlock); -} - TEST(SpinLockWithThreads, StackSpinLock) { SpinLock spinlock; ThreadedTest(&spinlock); diff --git a/absl/container/node_hash_map.h b/absl/container/node_hash_map.h index fccea184..174b971e 100644 --- a/absl/container/node_hash_map.h +++ b/absl/container/node_hash_map.h @@ -514,12 +514,6 @@ class node_hash_map // // Returns the function used for comparing keys equality. using Base::key_eq; - - ABSL_DEPRECATED("Call `hash_function()` instead.") - typename Base::hasher hash_funct() { return this->hash_function(); } - - ABSL_DEPRECATED("Call `rehash()` instead.") - void resize(typename Base::size_type hint) { this->rehash(hint); } }; // erase_if(node_hash_map<>, Pred) diff --git a/absl/container/node_hash_set.h b/absl/container/node_hash_set.h index ad54b6dc..56bab5c2 100644 --- a/absl/container/node_hash_set.h +++ b/absl/container/node_hash_set.h @@ -427,12 +427,6 @@ class node_hash_set // // Returns the function used for comparing keys equality. using Base::key_eq; - - ABSL_DEPRECATED("Call `hash_function()` instead.") - typename Base::hasher hash_funct() { return this->hash_function(); } - - ABSL_DEPRECATED("Call `rehash()` instead.") - void resize(typename Base::size_type hint) { this->rehash(hint); } }; // erase_if(node_hash_set<>, Pred) diff --git a/absl/flags/flag.h b/absl/flags/flag.h index 194a9d31..8dd1b9be 100644 --- a/absl/flags/flag.h +++ b/absl/flags/flag.h @@ -118,11 +118,12 @@ class Flag { return impl_; } - impl_ = - new flags_internal::Flag<T>(name_, filename_, - {flags_internal::FlagHelpMsg(help_gen_), - flags_internal::FlagHelpKind::kGenFunc}, - default_value_gen_); + impl_ = new flags_internal::Flag<T>( + name_, filename_, + {flags_internal::FlagHelpMsg(help_gen_), + flags_internal::FlagHelpKind::kGenFunc}, + {flags_internal::FlagDefaultSrc(default_value_gen_), + flags_internal::FlagDefaultKind::kGenFunc}); inited_.store(true, std::memory_order_release); } @@ -132,14 +133,12 @@ class Flag { // Public methods of `absl::Flag<T>` are NOT part of the Abseil Flags API. // See https://abseil.io/docs/cpp/guides/flags bool IsRetired() const { return GetImpl()->IsRetired(); } - bool IsAbseilFlag() const { return GetImpl()->IsAbseilFlag(); } absl::string_view Name() const { return GetImpl()->Name(); } std::string Help() const { return GetImpl()->Help(); } bool IsModified() const { return GetImpl()->IsModified(); } bool IsSpecifiedOnCommandLine() const { return GetImpl()->IsSpecifiedOnCommandLine(); } - absl::string_view Typename() const { return GetImpl()->Typename(); } std::string Filename() const { return GetImpl()->Filename(); } std::string DefaultValue() const { return GetImpl()->DefaultValue(); } std::string CurrentValue() const { return GetImpl()->CurrentValue(); } @@ -311,9 +310,12 @@ ABSL_NAMESPACE_END static std::string NonConst() { return ABSL_FLAG_IMPL_FLAGHELP(txt); } \ } -#define ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value) \ - static void AbslFlagsInitFlag##name(void* dst) { \ - absl::flags_internal::MakeFromDefaultValue<Type>(dst, default_value); \ +#define ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value) \ + struct AbslFlagDefaultGenFor##name { \ + Type value = absl::flags_internal::InitDefaultValue<Type>(default_value); \ + static void Gen(void* p) { \ + new (p) Type(AbslFlagDefaultGenFor##name{}.value); \ + } \ } // ABSL_FLAG_IMPL @@ -322,29 +324,30 @@ ABSL_NAMESPACE_END // global name for FLAGS_no<flag_name> symbol, thus preventing the possibility // of defining two flags with names foo and nofoo. #if !defined(_MSC_VER) || defined(__clang__) -#define ABSL_FLAG_IMPL(Type, name, default_value, help) \ - namespace absl /* block flags in namespaces */ {} \ - ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value) \ - ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help); \ - ABSL_CONST_INIT absl::Flag<Type> FLAGS_##name{ \ - ABSL_FLAG_IMPL_FLAGNAME(#name), ABSL_FLAG_IMPL_FILENAME(), \ - absl::flags_internal::HelpArg<AbslFlagHelpGenFor##name>(0), \ - &AbslFlagsInitFlag##name}; \ - extern absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name; \ - absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name = \ + +#define ABSL_FLAG_IMPL(Type, name, default_value, help) \ + namespace absl /* block flags in namespaces */ {} \ + ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value); \ + ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help); \ + ABSL_CONST_INIT absl::Flag<Type> FLAGS_##name{ \ + ABSL_FLAG_IMPL_FLAGNAME(#name), ABSL_FLAG_IMPL_FILENAME(), \ + absl::flags_internal::HelpArg<AbslFlagHelpGenFor##name>(0), \ + absl::flags_internal::DefaultArg<Type, AbslFlagDefaultGenFor##name>(0)}; \ + extern absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name; \ + absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name = \ ABSL_FLAG_IMPL_REGISTRAR(Type, FLAGS_##name) #else // MSVC version uses aggregate initialization. We also do not try to // optimize away help wrapper. -#define ABSL_FLAG_IMPL(Type, name, default_value, help) \ - namespace absl /* block flags in namespaces */ {} \ - ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value) \ - ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help); \ - ABSL_CONST_INIT absl::Flag<Type> FLAGS_##name{ \ - ABSL_FLAG_IMPL_FLAGNAME(#name), ABSL_FLAG_IMPL_FILENAME(), \ - &AbslFlagHelpGenFor##name::NonConst, &AbslFlagsInitFlag##name}; \ - extern absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name; \ - absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name = \ +#define ABSL_FLAG_IMPL(Type, name, default_value, help) \ + namespace absl /* block flags in namespaces */ {} \ + ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value); \ + ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help); \ + ABSL_CONST_INIT absl::Flag<Type> FLAGS_##name{ \ + ABSL_FLAG_IMPL_FLAGNAME(#name), ABSL_FLAG_IMPL_FILENAME(), \ + &AbslFlagHelpGenFor##name::NonConst, &AbslFlagDefaultGenFor##name::Gen}; \ + extern absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name; \ + absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name = \ ABSL_FLAG_IMPL_REGISTRAR(Type, FLAGS_##name) #endif diff --git a/absl/flags/flag_test.cc b/absl/flags/flag_test.cc index 6fa178f1..015b1fc9 100644 --- a/absl/flags/flag_test.cc +++ b/absl/flags/flag_test.cc @@ -128,26 +128,27 @@ constexpr flags::FlagHelpArg help_arg{flags::FlagHelpMsg("literal help"), using String = std::string; -#define DEFINE_CONSTRUCTED_FLAG(T) \ - constexpr flags::Flag<T> f1##T("f1", "file", help_arg, &TestMakeDflt<T>); \ - ABSL_CONST_INIT flags::Flag<T> f2##T( \ - "f2", "file", \ - {flags::FlagHelpMsg(&TestHelpMsg), flags::FlagHelpKind::kGenFunc}, \ - &TestMakeDflt<T>) - -#define TEST_CONSTRUCTED_FLAG(T) TestConstructionFor(f1##T, &f2##T); - -DEFINE_CONSTRUCTED_FLAG(bool); -DEFINE_CONSTRUCTED_FLAG(int16_t); -DEFINE_CONSTRUCTED_FLAG(uint16_t); -DEFINE_CONSTRUCTED_FLAG(int32_t); -DEFINE_CONSTRUCTED_FLAG(uint32_t); -DEFINE_CONSTRUCTED_FLAG(int64_t); -DEFINE_CONSTRUCTED_FLAG(uint64_t); -DEFINE_CONSTRUCTED_FLAG(float); -DEFINE_CONSTRUCTED_FLAG(double); -DEFINE_CONSTRUCTED_FLAG(String); -DEFINE_CONSTRUCTED_FLAG(UDT); +#define DEFINE_CONSTRUCTED_FLAG(T, dflt, dflt_kind) \ + constexpr flags::FlagDefaultArg f1default##T{ \ + flags::FlagDefaultSrc{dflt}, flags::FlagDefaultKind::dflt_kind}; \ + constexpr flags::Flag<T> f1##T("f1", "file", help_arg, f1default##T); \ + ABSL_CONST_INIT flags::Flag<T> f2##T( \ + "f2", "file", \ + {flags::FlagHelpMsg(&TestHelpMsg), flags::FlagHelpKind::kGenFunc}, \ + flags::FlagDefaultArg{flags::FlagDefaultSrc(&TestMakeDflt<T>), \ + flags::FlagDefaultKind::kGenFunc}) + +DEFINE_CONSTRUCTED_FLAG(bool, true, kOneWord); +DEFINE_CONSTRUCTED_FLAG(int16_t, 1, kOneWord); +DEFINE_CONSTRUCTED_FLAG(uint16_t, 2, kOneWord); +DEFINE_CONSTRUCTED_FLAG(int32_t, 3, kOneWord); +DEFINE_CONSTRUCTED_FLAG(uint32_t, 4, kOneWord); +DEFINE_CONSTRUCTED_FLAG(int64_t, 5, kOneWord); +DEFINE_CONSTRUCTED_FLAG(uint64_t, 6, kOneWord); +DEFINE_CONSTRUCTED_FLAG(float, 7.8, kFloat); +DEFINE_CONSTRUCTED_FLAG(double, 9.10, kDouble); +DEFINE_CONSTRUCTED_FLAG(String, &TestMakeDflt<String>, kGenFunc); +DEFINE_CONSTRUCTED_FLAG(UDT, &TestMakeDflt<UDT>, kGenFunc); template <typename T> bool TestConstructionFor(const flags::Flag<T>& f1, flags::Flag<T>* f2) { @@ -164,6 +165,8 @@ bool TestConstructionFor(const flags::Flag<T>& f1, flags::Flag<T>* f2) { return true; } +#define TEST_CONSTRUCTED_FLAG(T) TestConstructionFor(f1##T, &f2##T); + TEST_F(FlagTest, TestConstruction) { TEST_CONSTRUCTED_FLAG(bool); TEST_CONSTRUCTED_FLAG(int16_t); @@ -443,29 +446,29 @@ TEST_F(FlagTest, TestGetSet) { TEST_F(FlagTest, TestGetViaReflection) { auto* handle = flags::FindCommandLineFlag("test_flag_01"); - EXPECT_EQ(*handle->Get<bool>(), true); + EXPECT_EQ(*handle->TryGet<bool>(), true); handle = flags::FindCommandLineFlag("test_flag_02"); - EXPECT_EQ(*handle->Get<int>(), 1234); + EXPECT_EQ(*handle->TryGet<int>(), 1234); handle = flags::FindCommandLineFlag("test_flag_03"); - EXPECT_EQ(*handle->Get<int16_t>(), -34); + EXPECT_EQ(*handle->TryGet<int16_t>(), -34); handle = flags::FindCommandLineFlag("test_flag_04"); - EXPECT_EQ(*handle->Get<uint16_t>(), 189); + EXPECT_EQ(*handle->TryGet<uint16_t>(), 189); handle = flags::FindCommandLineFlag("test_flag_05"); - EXPECT_EQ(*handle->Get<int32_t>(), 10765); + EXPECT_EQ(*handle->TryGet<int32_t>(), 10765); handle = flags::FindCommandLineFlag("test_flag_06"); - EXPECT_EQ(*handle->Get<uint32_t>(), 40000); + EXPECT_EQ(*handle->TryGet<uint32_t>(), 40000); handle = flags::FindCommandLineFlag("test_flag_07"); - EXPECT_EQ(*handle->Get<int64_t>(), -1234567); + EXPECT_EQ(*handle->TryGet<int64_t>(), -1234567); handle = flags::FindCommandLineFlag("test_flag_08"); - EXPECT_EQ(*handle->Get<uint64_t>(), 9876543); + EXPECT_EQ(*handle->TryGet<uint64_t>(), 9876543); handle = flags::FindCommandLineFlag("test_flag_09"); - EXPECT_NEAR(*handle->Get<double>(), -9.876e-50, 1e-55); + EXPECT_NEAR(*handle->TryGet<double>(), -9.876e-50, 1e-55); handle = flags::FindCommandLineFlag("test_flag_10"); - EXPECT_NEAR(*handle->Get<float>(), 1.234e12f, 1e5f); + EXPECT_NEAR(*handle->TryGet<float>(), 1.234e12f, 1e5f); handle = flags::FindCommandLineFlag("test_flag_11"); - EXPECT_EQ(*handle->Get<std::string>(), ""); + EXPECT_EQ(*handle->TryGet<std::string>(), ""); handle = flags::FindCommandLineFlag("test_flag_12"); - EXPECT_EQ(*handle->Get<absl::Duration>(), absl::Minutes(10)); + EXPECT_EQ(*handle->TryGet<absl::Duration>(), absl::Minutes(10)); } // -------------------------------------------------------------------- diff --git a/absl/flags/internal/commandlineflag.cc b/absl/flags/internal/commandlineflag.cc index 90765a3e..de588c13 100644 --- a/absl/flags/internal/commandlineflag.cc +++ b/absl/flags/internal/commandlineflag.cc @@ -22,7 +22,20 @@ namespace flags_internal { FlagStateInterface::~FlagStateInterface() {} bool CommandLineFlag::IsRetired() const { return false; } -bool CommandLineFlag::IsAbseilFlag() const { return true; } + +FlagFastTypeId PrivateHandleInterface::TypeId(const CommandLineFlag& flag) { + return flag.TypeId(); +} + +std::unique_ptr<FlagStateInterface> PrivateHandleInterface::SaveState( + CommandLineFlag* flag) { + return flag->SaveState(); +} + +bool PrivateHandleInterface::ValidateInputValue(const CommandLineFlag& flag, + absl::string_view value) { + return flag.ValidateInputValue(value); +} } // namespace flags_internal ABSL_NAMESPACE_END diff --git a/absl/flags/internal/commandlineflag.h b/absl/flags/internal/commandlineflag.h index ef992f7f..f807fb9a 100644 --- a/absl/flags/internal/commandlineflag.h +++ b/absl/flags/internal/commandlineflag.h @@ -93,7 +93,7 @@ class CommandLineFlag { // Attempts to retrieve the flag value. Returns value on success, // absl::nullopt otherwise. template <typename T> - absl::optional<T> Get() const { + absl::optional<T> TryGet() const { if (IsRetired() || !IsOfType<T>()) { return absl::nullopt; } @@ -130,29 +130,14 @@ class CommandLineFlag { virtual absl::string_view Name() const = 0; // Returns name of the file where this flag is defined. virtual std::string Filename() const = 0; - // Returns name of the flag's value type for some built-in types or empty - // string. - virtual absl::string_view Typename() const = 0; // Returns help message associated with this flag. virtual std::string Help() const = 0; // Returns true iff this object corresponds to retired flag. virtual bool IsRetired() const; - // Returns true iff this is a handle to an Abseil Flag. - virtual bool IsAbseilFlag() const; - // Returns id of the flag's value type. - virtual FlagFastTypeId TypeId() const = 0; - virtual bool IsModified() const = 0; virtual bool IsSpecifiedOnCommandLine() const = 0; virtual std::string DefaultValue() const = 0; virtual std::string CurrentValue() const = 0; - // Interfaces to operate on validators. - virtual bool ValidateInputValue(absl::string_view value) const = 0; - - // Interface to save flag to some persistent state. Returns current flag state - // or nullptr if flag does not support saving and restoring a state. - virtual std::unique_ptr<FlagStateInterface> SaveState() = 0; - // Sets the value of the flag based on specified string `value`. If the flag // was successfully set to new value, it returns true. Otherwise, sets `error` // to indicate the error, leaves the flag unchanged, and returns false. There @@ -174,9 +159,38 @@ class CommandLineFlag { ~CommandLineFlag() = default; private: + friend class PrivateHandleInterface; + + // Returns id of the flag's value type. + virtual FlagFastTypeId TypeId() const = 0; + + // Interface to save flag to some persistent state. Returns current flag state + // or nullptr if flag does not support saving and restoring a state. + virtual std::unique_ptr<FlagStateInterface> SaveState() = 0; + // Copy-construct a new value of the flag's type in a memory referenced by // the dst based on the current flag's value. virtual void Read(void* dst) const = 0; + + // Interfaces to operate on validators. + // Validates supplied value usign validator or parseflag routine + virtual bool ValidateInputValue(absl::string_view value) const = 0; +}; + +// This class serves as a trampoline to access private methods of +// CommandLineFlag. This class is intended for use exclusively internally inside +// of the Abseil Flags implementation +class PrivateHandleInterface { + public: + // Access to CommandLineFlag::TypeId. + static FlagFastTypeId TypeId(const CommandLineFlag& flag); + + // Access to CommandLineFlag::SaveState. + static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag* flag); + + // Access to CommandLineFlag::ValidateInputValue. + static bool ValidateInputValue(const CommandLineFlag& flag, + absl::string_view value); }; // This macro is the "source of truth" for the list of supported flag built-in diff --git a/absl/flags/internal/commandlineflag_test.cc b/absl/flags/internal/commandlineflag_test.cc index c1142b7c..c31679f9 100644 --- a/absl/flags/internal/commandlineflag_test.cc +++ b/absl/flags/internal/commandlineflag_test.cc @@ -67,7 +67,6 @@ TEST_F(CommandLineFlagTest, TestAttributesAccessMethods) { ASSERT_TRUE(flag_01); EXPECT_EQ(flag_01->Name(), "int_flag"); EXPECT_EQ(flag_01->Help(), "int_flag help"); - EXPECT_EQ(flag_01->Typename(), ""); EXPECT_TRUE(!flag_01->IsRetired()); EXPECT_TRUE(flag_01->IsOfType<int>()); EXPECT_TRUE( @@ -80,7 +79,6 @@ TEST_F(CommandLineFlagTest, TestAttributesAccessMethods) { ASSERT_TRUE(flag_02); EXPECT_EQ(flag_02->Name(), "string_flag"); EXPECT_EQ(flag_02->Help(), "string_flag help"); - EXPECT_EQ(flag_02->Typename(), ""); EXPECT_TRUE(!flag_02->IsRetired()); EXPECT_TRUE(flag_02->IsOfType<std::string>()); EXPECT_TRUE( @@ -93,7 +91,6 @@ TEST_F(CommandLineFlagTest, TestAttributesAccessMethods) { ASSERT_TRUE(flag_03); EXPECT_EQ(flag_03->Name(), "bool_retired_flag"); EXPECT_EQ(flag_03->Help(), ""); - EXPECT_EQ(flag_03->Typename(), ""); EXPECT_TRUE(flag_03->IsRetired()); EXPECT_TRUE(flag_03->IsOfType<bool>()); EXPECT_EQ(flag_03->Filename(), "RETIRED"); diff --git a/absl/flags/internal/flag.cc b/absl/flags/internal/flag.cc index 089567f7..8f0777fa 100644 --- a/absl/flags/internal/flag.cc +++ b/absl/flags/internal/flag.cc @@ -139,19 +139,43 @@ void DynValueDeleter::operator()(void* ptr) const { void FlagImpl::Init() { new (&data_guard_) absl::Mutex; - // At this point the default_value_ always points to gen_func. + auto def_kind = static_cast<FlagDefaultKind>(def_kind_); + switch (ValueStorageKind()) { case FlagValueStorageKind::kAlignedBuffer: + // For this storage kind the default_value_ always points to gen_func + // during initialization. + assert(def_kind == FlagDefaultKind::kGenFunc); (*default_value_.gen_func)(AlignedBufferValue()); break; case FlagValueStorageKind::kOneWordAtomic: { alignas(int64_t) std::array<char, sizeof(int64_t)> buf{}; - (*default_value_.gen_func)(buf.data()); - auto value = absl::bit_cast<int64_t>(buf); - OneWordValue().store(value, std::memory_order_release); + switch (def_kind) { + case FlagDefaultKind::kOneWord: + std::memcpy(buf.data(), &default_value_.one_word, + sizeof(default_value_.one_word)); + break; + case FlagDefaultKind::kFloat: + std::memcpy(buf.data(), &default_value_.float_value, + sizeof(default_value_.float_value)); + break; + case FlagDefaultKind::kDouble: + std::memcpy(buf.data(), &default_value_.double_value, + sizeof(default_value_.double_value)); + break; + default: + assert(def_kind == FlagDefaultKind::kGenFunc); + (*default_value_.gen_func)(buf.data()); + break; + } + OneWordValue().store(absl::bit_cast<int64_t>(buf), + std::memory_order_release); break; } case FlagValueStorageKind::kTwoWordsAtomic: { + // For this storage kind the default_value_ always points to gen_func + // during initialization. + assert(def_kind == FlagDefaultKind::kGenFunc); alignas(AlignedTwoWords) std::array<char, sizeof(AlignedTwoWords)> buf{}; (*default_value_.gen_func)(buf.data()); auto atomic_value = absl::bit_cast<AlignedTwoWords>(buf); @@ -196,11 +220,23 @@ void FlagImpl::AssertValidType(FlagFastTypeId rhs_type_id, std::unique_ptr<void, DynValueDeleter> FlagImpl::MakeInitValue() const { void* res = nullptr; - if (DefaultKind() == FlagDefaultKind::kDynamicValue) { - res = flags_internal::Clone(op_, default_value_.dynamic_value); - } else { - res = flags_internal::Alloc(op_); - (*default_value_.gen_func)(res); + switch (DefaultKind()) { + case FlagDefaultKind::kDynamicValue: + res = flags_internal::Clone(op_, default_value_.dynamic_value); + break; + case FlagDefaultKind::kGenFunc: + res = flags_internal::Alloc(op_); + (*default_value_.gen_func)(res); + break; + case FlagDefaultKind::kOneWord: + res = flags_internal::Clone(op_, &default_value_.one_word); + break; + case FlagDefaultKind::kFloat: + res = flags_internal::Clone(op_, &default_value_.float_value); + break; + case FlagDefaultKind::kDouble: + res = flags_internal::Clone(op_, &default_value_.double_value); + break; } return {res, DynValueDeleter{op_}}; } @@ -235,8 +271,6 @@ std::string FlagImpl::Filename() const { return flags_internal::GetUsageConfig().normalize_filename(filename_); } -absl::string_view FlagImpl::Typename() const { return ""; } - std::string FlagImpl::Help() const { return HelpSourceKind() == FlagHelpKind::kLiteral ? help_.literal : help_.gen_func(); @@ -246,11 +280,6 @@ FlagFastTypeId FlagImpl::TypeId() const { return flags_internal::FastTypeId(op_); } -bool FlagImpl::IsModified() const { - absl::MutexLock l(DataGuard()); - return modified_; -} - bool FlagImpl::IsSpecifiedOnCommandLine() const { absl::MutexLock l(DataGuard()); return on_command_line_; diff --git a/absl/flags/internal/flag.h b/absl/flags/internal/flag.h index 6da25aa9..b2208824 100644 --- a/absl/flags/internal/flag.h +++ b/absl/flags/internal/flag.h @@ -206,12 +206,72 @@ using FlagDfltGenFunc = void (*)(void*); union FlagDefaultSrc { constexpr explicit FlagDefaultSrc(FlagDfltGenFunc gen_func_arg) : gen_func(gen_func_arg) {} + template <typename T> + constexpr explicit FlagDefaultSrc(T one_word_value) + : one_word(static_cast<int64_t>(one_word_value)) {} + constexpr explicit FlagDefaultSrc(float f) : float_value(f) {} + constexpr explicit FlagDefaultSrc(double d) : double_value(d) {} void* dynamic_value; FlagDfltGenFunc gen_func; + int64_t one_word; + float float_value; + double double_value; +}; + +enum class FlagDefaultKind : uint8_t { + kDynamicValue = 0, + kGenFunc = 1, + kOneWord = 2, + kFloat = 3, + kDouble = 4 +}; + +struct FlagDefaultArg { + FlagDefaultSrc source; + FlagDefaultKind kind; }; -enum class FlagDefaultKind : uint8_t { kDynamicValue = 0, kGenFunc = 1 }; +// This struct and corresponding overload to InitDefaultValue are used to +// facilitate usage of {} as default value in ABSL_FLAG macro. +// TODO(rogeeff): Fix handling types with explicit constructors. +struct EmptyBraces {}; + +template <typename T> +constexpr T InitDefaultValue(T t) { + return t; +} + +template <typename T> +constexpr T InitDefaultValue(EmptyBraces) { + return T{}; +} + +template <typename ValueT, typename GenT, + typename std::enable_if<std::is_integral<ValueT>::value, int>::type = + (GenT{}, 0)> +constexpr FlagDefaultArg DefaultArg(int) { + return {FlagDefaultSrc(GenT{}.value), FlagDefaultKind::kOneWord}; +} + +template <typename ValueT, typename GenT, + typename std::enable_if<std::is_same<ValueT, float>::value, + int>::type = (GenT{}, 0)> +constexpr FlagDefaultArg DefaultArg(int) { + return {FlagDefaultSrc(GenT{}.value), FlagDefaultKind::kFloat}; +} + +template <typename ValueT, typename GenT, + typename std::enable_if<std::is_same<ValueT, double>::value, + int>::type = (GenT{}, 0)> +constexpr FlagDefaultArg DefaultArg(int) { + return {FlagDefaultSrc(GenT{}.value), FlagDefaultKind::kDouble}; +} + +template <typename ValueT, typename GenT> +constexpr FlagDefaultArg DefaultArg(char) { + return {FlagDefaultSrc(&GenT::Gen), FlagDefaultKind::kGenFunc}; +} /////////////////////////////////////////////////////////////////////////////// // Flag current value auxiliary structs. @@ -356,19 +416,19 @@ class FlagImpl final : public flags_internal::CommandLineFlag { public: constexpr FlagImpl(const char* name, const char* filename, FlagOpFn op, FlagHelpArg help, FlagValueStorageKind value_kind, - FlagDfltGenFunc default_value_gen) + FlagDefaultArg default_arg) : name_(name), filename_(filename), op_(op), help_(help.source), help_source_kind_(static_cast<uint8_t>(help.kind)), value_storage_kind_(static_cast<uint8_t>(value_kind)), - def_kind_(static_cast<uint8_t>(FlagDefaultKind::kGenFunc)), + def_kind_(static_cast<uint8_t>(default_arg.kind)), modified_(false), on_command_line_(false), counter_(0), callback_(nullptr), - default_value_(default_value_gen), + default_value_(default_arg.source), data_guard_{} {} // Constant access methods @@ -444,10 +504,8 @@ class FlagImpl final : public flags_internal::CommandLineFlag { // CommandLineFlag interface implementation absl::string_view Name() const override; std::string Filename() const override; - absl::string_view Typename() const override; std::string Help() const override; FlagFastTypeId TypeId() const override; - bool IsModified() const override ABSL_LOCKS_EXCLUDED(*DataGuard()); bool IsSpecifiedOnCommandLine() const override ABSL_LOCKS_EXCLUDED(*DataGuard()); std::string DefaultValue() const override ABSL_LOCKS_EXCLUDED(*DataGuard()); @@ -492,9 +550,10 @@ class FlagImpl final : public flags_internal::CommandLineFlag { // Mutable flag's state (guarded by `data_guard_`). - // If def_kind_ == kDynamicValue, default_value_ holds a dynamically allocated - // value. - uint8_t def_kind_ : 1 ABSL_GUARDED_BY(*DataGuard()); + // def_kind_ is not guard by DataGuard() since it is accessed in Init without + // locks. If necessary we can decrease number of bits used to 2 by folding + // one_word storage cases. + uint8_t def_kind_ : 3; // Has this flag's value been modified? bool modified_ : 1 ABSL_GUARDED_BY(*DataGuard()); // Has this flag been specified on command line. @@ -530,10 +589,10 @@ class FlagImpl final : public flags_internal::CommandLineFlag { template <typename T> class Flag { public: - constexpr Flag(const char* name, const char* filename, const FlagHelpArg help, - const FlagDfltGenFunc default_value_gen) + constexpr Flag(const char* name, const char* filename, FlagHelpArg help, + const FlagDefaultArg default_arg) : impl_(name, filename, &FlagOps<T>, help, - flags_internal::StorageKind<T>(), default_value_gen), + flags_internal::StorageKind<T>(), default_arg), value_() {} T Get() const { @@ -560,9 +619,7 @@ class Flag { // CommandLineFlag interface absl::string_view Name() const { return impl_.Name(); } std::string Filename() const { return impl_.Filename(); } - absl::string_view Typename() const { return ""; } std::string Help() const { return impl_.Help(); } - bool IsModified() const { return impl_.IsModified(); } bool IsSpecifiedOnCommandLine() const { return impl_.IsSpecifiedOnCommandLine(); } @@ -662,20 +719,6 @@ class FlagRegistrar { Flag<T>* flag_; // Flag being registered (not owned). }; -// This struct and corresponding overload to MakeDefaultValue are used to -// facilitate usage of {} as default value in ABSL_FLAG macro. -struct EmptyBraces {}; - -template <typename T> -void MakeFromDefaultValue(void* dst, T t) { - new (dst) T(std::move(t)); -} - -template <typename T> -void MakeFromDefaultValue(void* dst, EmptyBraces) { - new (dst) T{}; -} - } // namespace flags_internal ABSL_NAMESPACE_END } // namespace absl diff --git a/absl/flags/internal/registry.cc b/absl/flags/internal/registry.cc index eb619c70..62b5b40d 100644 --- a/absl/flags/internal/registry.cc +++ b/absl/flags/internal/registry.cc @@ -127,14 +127,13 @@ void FlagRegistry::RegisterFlag(CommandLineFlag* flag) { (flag->IsRetired() ? old_flag->Filename() : flag->Filename()), "'."), true); - } else if (flag->TypeId() != old_flag->TypeId()) { + } else if (flags_internal::PrivateHandleInterface::TypeId(*flag) != + flags_internal::PrivateHandleInterface::TypeId(*old_flag)) { flags_internal::ReportUsageError( absl::StrCat("Flag '", flag->Name(), "' was defined more than once but with " "differing types. Defined in files '", - old_flag->Filename(), "' and '", flag->Filename(), - "' with types '", old_flag->Typename(), "' and '", - flag->Typename(), "', respectively."), + old_flag->Filename(), "' and '", flag->Filename(), "'."), true); } else if (old_flag->IsRetired()) { // Retired flag can just be deleted. @@ -206,7 +205,8 @@ class FlagSaverImpl { void SaveFromRegistry() { assert(backup_registry_.empty()); // call only once! flags_internal::ForEachFlag([&](flags_internal::CommandLineFlag* flag) { - if (auto flag_state = flag->SaveState()) { + if (auto flag_state = + flags_internal::PrivateHandleInterface::SaveState(flag)) { backup_registry_.emplace_back(std::move(flag_state)); } }); @@ -290,11 +290,9 @@ class RetiredFlagObj final : public flags_internal::CommandLineFlag { private: absl::string_view Name() const override { return name_; } std::string Filename() const override { return "RETIRED"; } - absl::string_view Typename() const override { return ""; } FlagFastTypeId TypeId() const override { return type_id_; } std::string Help() const override { return ""; } bool IsRetired() const override { return true; } - bool IsModified() const override { return false; } bool IsSpecifiedOnCommandLine() const override { return false; } std::string DefaultValue() const override { return ""; } std::string CurrentValue() const override { return ""; } diff --git a/absl/flags/internal/type_erased.cc b/absl/flags/internal/type_erased.cc index 75b4cdf8..5038625b 100644 --- a/absl/flags/internal/type_erased.cc +++ b/absl/flags/internal/type_erased.cc @@ -72,7 +72,9 @@ bool IsValidFlagValue(absl::string_view name, absl::string_view value) { CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); return flag != nullptr && - (flag->IsRetired() || flag->ValidateInputValue(value)); + (flag->IsRetired() || + flags_internal::PrivateHandleInterface::ValidateInputValue(*flag, + value)); } // -------------------------------------------------------------------- diff --git a/absl/flags/internal/type_erased.h b/absl/flags/internal/type_erased.h index 188429c7..ffe319ba 100644 --- a/absl/flags/internal/type_erased.h +++ b/absl/flags/internal/type_erased.h @@ -75,7 +75,7 @@ inline bool GetByName(absl::string_view name, T* dst) { CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); if (!flag) return false; - if (auto val = flag->Get<T>()) { + if (auto val = flag->TryGet<T>()) { *dst = *val; return true; } diff --git a/absl/flags/internal/usage.cc b/absl/flags/internal/usage.cc index a9a5cba9..9d856c87 100644 --- a/absl/flags/internal/usage.cc +++ b/absl/flags/internal/usage.cc @@ -54,27 +54,6 @@ ABSL_NAMESPACE_BEGIN namespace flags_internal { namespace { -absl::string_view TypenameForHelp(const flags_internal::CommandLineFlag& flag) { - // Only report names of v1 built-in types -#define HANDLE_V1_BUILTIN_TYPE(t) \ - if (flag.IsOfType<t>()) { \ - return #t; \ - } - - HANDLE_V1_BUILTIN_TYPE(bool); - HANDLE_V1_BUILTIN_TYPE(int32_t); - HANDLE_V1_BUILTIN_TYPE(int64_t); - HANDLE_V1_BUILTIN_TYPE(uint64_t); - HANDLE_V1_BUILTIN_TYPE(double); -#undef HANDLE_V1_BUILTIN_TYPE - - if (flag.IsOfType<std::string>()) { - return "string"; - } - - return ""; -} - // This class is used to emit an XML element with `tag` and `text`. // It adds opening and closing tags and escapes special characters in the text. // For example: @@ -212,23 +191,20 @@ void FlagHelpHumanReadable(const flags_internal::CommandLineFlag& flag, // Flag help. printer.Write(absl::StrCat("(", flag.Help(), ");"), /*wrap_line=*/true); - // Flag data type (for V1 flags only). - if (!flag.IsAbseilFlag() && !flag.IsRetired()) { - printer.Write(absl::StrCat("type: ", TypenameForHelp(flag), ";")); - } - // The listed default value will be the actual default from the flag // definition in the originating source file, unless the value has // subsequently been modified using SetCommandLineOption() with mode // SET_FLAGS_DEFAULT. std::string dflt_val = flag.DefaultValue(); + std::string curr_val = flag.CurrentValue(); + bool is_modified = curr_val != dflt_val; + if (flag.IsOfType<std::string>()) { dflt_val = absl::StrCat("\"", dflt_val, "\""); } printer.Write(absl::StrCat("default: ", dflt_val, ";")); - if (flag.IsModified()) { - std::string curr_val = flag.CurrentValue(); + if (is_modified) { if (flag.IsOfType<std::string>()) { curr_val = absl::StrCat("\"", curr_val, "\""); } diff --git a/absl/strings/internal/str_format/arg.cc b/absl/strings/internal/str_format/arg.cc index 12842276..a112071c 100644 --- a/absl/strings/internal/str_format/arg.cc +++ b/absl/strings/internal/str_format/arg.cc @@ -315,7 +315,7 @@ bool ConvertFloatArg(T v, const ConversionSpec conv, FormatSinkImpl *sink) { inline bool ConvertStringArg(string_view v, const ConversionSpec conv, FormatSinkImpl *sink) { - if (conv.conversion_char() != ConversionChar::s) return false; + if (conv.conversion_char() != FormatConversionCharInternal::s) return false; if (conv.is_basic()) { sink->Append(v); return true; @@ -327,22 +327,22 @@ inline bool ConvertStringArg(string_view v, const ConversionSpec conv, } // namespace // ==================== Strings ==================== -ConvertResult<Conv::s> FormatConvertImpl(const std::string &v, - const ConversionSpec conv, - FormatSinkImpl *sink) { +StringConvertResult FormatConvertImpl(const std::string &v, + const ConversionSpec conv, + FormatSinkImpl *sink) { return {ConvertStringArg(v, conv, sink)}; } -ConvertResult<Conv::s> FormatConvertImpl(string_view v, - const ConversionSpec conv, - FormatSinkImpl *sink) { +StringConvertResult FormatConvertImpl(string_view v, const ConversionSpec conv, + FormatSinkImpl *sink) { return {ConvertStringArg(v, conv, sink)}; } -ConvertResult<Conv::s | Conv::p> FormatConvertImpl(const char *v, - const ConversionSpec conv, - FormatSinkImpl *sink) { - if (conv.conversion_char() == ConversionChar::p) +ArgConvertResult<FormatConversionCharSetUnion( + FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::p)> +FormatConvertImpl(const char *v, const ConversionSpec conv, + FormatSinkImpl *sink) { + if (conv.conversion_char() == FormatConversionCharInternal::p) return {FormatConvertImpl(VoidPtr(v), conv, sink).value}; size_t len; if (v == nullptr) { @@ -357,9 +357,9 @@ ConvertResult<Conv::s | Conv::p> FormatConvertImpl(const char *v, } // ==================== Raw pointers ==================== -ConvertResult<Conv::p> FormatConvertImpl(VoidPtr v, const ConversionSpec conv, - FormatSinkImpl *sink) { - if (conv.conversion_char() != ConversionChar::p) return {false}; +ArgConvertResult<FormatConversionCharSetInternal::p> FormatConvertImpl( + VoidPtr v, const ConversionSpec conv, FormatSinkImpl *sink) { + if (conv.conversion_char() != FormatConversionCharInternal::p) return {false}; if (!v.value) { sink->Append("(nil)"); return {true}; diff --git a/absl/strings/internal/str_format/arg.h b/absl/strings/internal/str_format/arg.h index 1c36e309..f4ac940a 100644 --- a/absl/strings/internal/str_format/arg.h +++ b/absl/strings/internal/str_format/arg.h @@ -31,10 +31,11 @@ template <typename T, typename = void> struct HasUserDefinedConvert : std::false_type {}; template <typename T> -struct HasUserDefinedConvert< - T, void_t<decltype(AbslFormatConvert( - std::declval<const T&>(), std::declval<ConversionSpec>(), - std::declval<FormatSink*>()))>> : std::true_type {}; +struct HasUserDefinedConvert<T, void_t<decltype(AbslFormatConvert( + std::declval<const T&>(), + std::declval<const FormatConversionSpec&>(), + std::declval<FormatSink*>()))>> + : std::true_type {}; template <typename T> class StreamedWrapper; @@ -52,25 +53,36 @@ struct VoidPtr { : value(ptr ? reinterpret_cast<uintptr_t>(ptr) : 0) {} uintptr_t value; }; -ConvertResult<Conv::p> FormatConvertImpl(VoidPtr v, ConversionSpec conv, - FormatSinkImpl* sink); + +template <FormatConversionCharSet C> +struct ArgConvertResult { + bool value; +}; + +template <FormatConversionCharSet C> +constexpr FormatConversionCharSet ExtractCharSet(ArgConvertResult<C>) { + return C; +} + +using StringConvertResult = + ArgConvertResult<FormatConversionCharSetInternal::s>; +ArgConvertResult<FormatConversionCharSetInternal::p> FormatConvertImpl( + VoidPtr v, ConversionSpec conv, FormatSinkImpl* sink); // Strings. -ConvertResult<Conv::s> FormatConvertImpl(const std::string& v, - ConversionSpec conv, - FormatSinkImpl* sink); -ConvertResult<Conv::s> FormatConvertImpl(string_view v, ConversionSpec conv, - FormatSinkImpl* sink); -ConvertResult<Conv::s | Conv::p> FormatConvertImpl(const char* v, - ConversionSpec conv, - FormatSinkImpl* sink); -template <class AbslCord, - typename std::enable_if< - std::is_same<AbslCord, absl::Cord>::value>::type* = nullptr> -ConvertResult<Conv::s> FormatConvertImpl(const AbslCord& value, - ConversionSpec conv, - FormatSinkImpl* sink) { - if (conv.conversion_char() != ConversionChar::s) { +StringConvertResult FormatConvertImpl(const std::string& v, ConversionSpec conv, + FormatSinkImpl* sink); +StringConvertResult FormatConvertImpl(string_view v, ConversionSpec conv, + FormatSinkImpl* sink); +ArgConvertResult<FormatConversionCharSetUnion( + FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::p)> +FormatConvertImpl(const char* v, ConversionSpec conv, FormatSinkImpl* sink); +template <class AbslCord, typename std::enable_if<std::is_same< + AbslCord, absl::Cord>::value>::type* = nullptr> +StringConvertResult FormatConvertImpl(const AbslCord& value, + ConversionSpec conv, + FormatSinkImpl* sink) { + if (conv.conversion_char() != FormatConversionCharInternal::s) { return {false}; } @@ -107,9 +119,12 @@ ConvertResult<Conv::s> FormatConvertImpl(const AbslCord& value, return {true}; } -using IntegralConvertResult = - ConvertResult<Conv::c | Conv::kNumeric | Conv::kStar>; -using FloatingConvertResult = ConvertResult<Conv::kFloating>; +using IntegralConvertResult = ArgConvertResult<FormatConversionCharSetUnion( + FormatConversionCharSetInternal::c, + FormatConversionCharSetInternal::kNumeric, + FormatConversionCharSetInternal::kStar)>; +using FloatingConvertResult = + ArgConvertResult<FormatConversionCharSetInternal::kFloating>; // Floats. FloatingConvertResult FormatConvertImpl(float v, ConversionSpec conv, @@ -169,9 +184,9 @@ typename std::enable_if<std::is_enum<T>::value && FormatConvertImpl(T v, ConversionSpec conv, FormatSinkImpl* sink); template <typename T> -ConvertResult<Conv::s> FormatConvertImpl(const StreamedWrapper<T>& v, - ConversionSpec conv, - FormatSinkImpl* out) { +StringConvertResult FormatConvertImpl(const StreamedWrapper<T>& v, + ConversionSpec conv, + FormatSinkImpl* out) { std::ostringstream oss; oss << v.v_; if (!oss) return {false}; @@ -182,12 +197,12 @@ ConvertResult<Conv::s> FormatConvertImpl(const StreamedWrapper<T>& v, // until after FormatCountCapture is fully defined. struct FormatCountCaptureHelper { template <class T = int> - static ConvertResult<Conv::n> ConvertHelper(const FormatCountCapture& v, - ConversionSpec conv, - FormatSinkImpl* sink) { + static ArgConvertResult<FormatConversionCharSetInternal::n> ConvertHelper( + const FormatCountCapture& v, ConversionSpec conv, FormatSinkImpl* sink) { const absl::enable_if_t<sizeof(T) != 0, FormatCountCapture>& v2 = v; - if (conv.conversion_char() != str_format_internal::ConversionChar::n) { + if (conv.conversion_char() != + str_format_internal::FormatConversionCharInternal::n) { return {false}; } *v2.p_ = static_cast<int>(sink->size()); @@ -196,9 +211,8 @@ struct FormatCountCaptureHelper { }; template <class T = int> -ConvertResult<Conv::n> FormatConvertImpl(const FormatCountCapture& v, - ConversionSpec conv, - FormatSinkImpl* sink) { +ArgConvertResult<FormatConversionCharSetInternal::n> FormatConvertImpl( + const FormatCountCapture& v, ConversionSpec conv, FormatSinkImpl* sink) { return FormatCountCaptureHelper::ConvertHelper(v, conv, sink); } @@ -381,7 +395,8 @@ class FormatArgImpl { template <typename T> static bool Dispatch(Data arg, ConversionSpec spec, void* out) { // A `none` conv indicates that we want the `int` conversion. - if (ABSL_PREDICT_FALSE(spec.conversion_char() == ConversionChar::kNone)) { + if (ABSL_PREDICT_FALSE(spec.conversion_char() == + FormatConversionCharInternal::kNone)) { return ToInt<T>(arg, static_cast<int*>(out), std::is_integral<T>(), std::is_enum<T>()); } diff --git a/absl/strings/internal/str_format/bind.h b/absl/strings/internal/str_format/bind.h index d30fdf50..05105d8d 100644 --- a/absl/strings/internal/str_format/bind.h +++ b/absl/strings/internal/str_format/bind.h @@ -189,9 +189,8 @@ class StreamedWrapper { private: template <typename S> - friend ConvertResult<Conv::s> FormatConvertImpl(const StreamedWrapper<S>& v, - ConversionSpec conv, - FormatSinkImpl* out); + friend ArgConvertResult<FormatConversionCharSetInternal::s> FormatConvertImpl( + const StreamedWrapper<S>& v, ConversionSpec conv, FormatSinkImpl* out); const T& v_; }; diff --git a/absl/strings/internal/str_format/checker.h b/absl/strings/internal/str_format/checker.h index 8993a79b..73ef05ff 100644 --- a/absl/strings/internal/str_format/checker.h +++ b/absl/strings/internal/str_format/checker.h @@ -25,10 +25,12 @@ constexpr bool AllOf(bool b, T... t) { } template <typename Arg> -constexpr Conv ArgumentToConv() { - return decltype(str_format_internal::FormatConvertImpl( - std::declval<const Arg&>(), std::declval<const ConversionSpec&>(), - std::declval<FormatSinkImpl*>()))::kConv; +constexpr FormatConversionCharSet ArgumentToConv() { + return absl::str_format_internal::ExtractCharSet( + decltype(str_format_internal::FormatConvertImpl( + std::declval<const Arg&>(), + std::declval<const FormatConversionSpecImpl&>(), + std::declval<FormatSinkImpl*>())){}); } #ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER @@ -39,14 +41,14 @@ constexpr bool ContainsChar(const char* chars, char c) { // A constexpr compatible list of Convs. struct ConvList { - const Conv* array; + const FormatConversionCharSet* array; int count; // We do the bound check here to avoid having to do it on the callers. - // Returning an empty Conv has the same effect as short circuiting because it - // will never match any conversion. - constexpr Conv operator[](int i) const { - return i < count ? array[i] : Conv{}; + // Returning an empty FormatConversionCharSet has the same effect as + // short circuiting because it will never match any conversion. + constexpr FormatConversionCharSet operator[](int i) const { + return i < count ? array[i] : FormatConversionCharSet{}; } constexpr ConvList without_front() const { @@ -57,7 +59,7 @@ struct ConvList { template <size_t count> struct ConvListT { // Make sure the array has size > 0. - Conv list[count ? count : 1]; + FormatConversionCharSet list[count ? count : 1]; }; constexpr char GetChar(string_view str, size_t index) { @@ -310,7 +312,7 @@ class FormatParser { ConvList args_; }; -template <Conv... C> +template <FormatConversionCharSet... C> constexpr bool ValidFormatImpl(string_view format) { return FormatParser(format, {ConvListT<sizeof...(C)>{{C...}}.list, sizeof...(C)}) diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h index fb31a9db..f0cffe1e 100644 --- a/absl/strings/internal/str_format/extension.h +++ b/absl/strings/internal/str_format/extension.h @@ -30,7 +30,10 @@ namespace absl { ABSL_NAMESPACE_BEGIN + namespace str_format_internal { +enum class FormatConversionCharSet : uint64_t; +enum class FormatConversionChar : uint8_t; class FormatRawSinkImpl { public: @@ -149,13 +152,39 @@ struct Flags { X_VAL(g) X_SEP X_VAL(G) X_SEP X_VAL(a) X_SEP X_VAL(A) X_SEP \ /* misc */ \ X_VAL(n) X_SEP X_VAL(p) +// clang-format on -enum class FormatConversionChar : uint8_t { +// This type should not be referenced, it exists only to provide labels +// internally that match the values declared in FormatConversionChar in +// str_format.h. This is meant to allow internal libraries to use the same +// declared interface type as the public interface +// (absl::StrFormatConversionChar) while keeping the definition in a public +// header. +// Internal libraries should use the form +// `FormatConversionCharInternal::c`, `FormatConversionCharInternal::kNone` for +// comparisons. Use in switch statements is not recommended due to a bug in how +// gcc 4.9 -Wswitch handles declared but undefined enums. +struct FormatConversionCharInternal { + FormatConversionCharInternal() = delete; + + private: + // clang-format off + enum class Enum : uint8_t { c, C, s, S, // text d, i, o, u, x, X, // int f, F, e, E, g, G, a, A, // float n, p, // misc kNone + }; + // clang-format on + public: +#define ABSL_INTERNAL_X_VAL(id) \ + static constexpr FormatConversionChar id = \ + static_cast<FormatConversionChar>(Enum::id); + ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, ) +#undef ABSL_INTERNAL_X_VAL + static constexpr FormatConversionChar kNone = + static_cast<FormatConversionChar>(Enum::kNone); }; // clang-format on @@ -163,56 +192,56 @@ inline FormatConversionChar FormatConversionCharFromChar(char c) { switch (c) { #define ABSL_INTERNAL_X_VAL(id) \ case #id[0]: \ - return FormatConversionChar::id; + return FormatConversionCharInternal::id; ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, ) #undef ABSL_INTERNAL_X_VAL } - return FormatConversionChar::kNone; + return FormatConversionCharInternal::kNone; } inline bool FormatConversionCharIsUpper(FormatConversionChar c) { - switch (c) { - case FormatConversionChar::X: - case FormatConversionChar::F: - case FormatConversionChar::E: - case FormatConversionChar::G: - case FormatConversionChar::A: - return true; - default: - return false; + if (c == FormatConversionCharInternal::X || + c == FormatConversionCharInternal::F || + c == FormatConversionCharInternal::E || + c == FormatConversionCharInternal::G || + c == FormatConversionCharInternal::A) { + return true; + } else { + return false; } } inline bool FormatConversionCharIsFloat(FormatConversionChar c) { - switch (c) { - case FormatConversionChar::a: - case FormatConversionChar::e: - case FormatConversionChar::f: - case FormatConversionChar::g: - case FormatConversionChar::A: - case FormatConversionChar::E: - case FormatConversionChar::F: - case FormatConversionChar::G: - return true; - default: - return false; + if (c == FormatConversionCharInternal::a || + c == FormatConversionCharInternal::e || + c == FormatConversionCharInternal::f || + c == FormatConversionCharInternal::g || + c == FormatConversionCharInternal::A || + c == FormatConversionCharInternal::E || + c == FormatConversionCharInternal::F || + c == FormatConversionCharInternal::G) { + return true; + } else { + return false; } } inline char FormatConversionCharToChar(FormatConversionChar c) { - switch (c) { -#define ABSL_INTERNAL_X_VAL(e) \ - case FormatConversionChar::e: \ + if (c == FormatConversionCharInternal::kNone) { + return '\0'; + +#define ABSL_INTERNAL_X_VAL(e) \ + } else if (c == FormatConversionCharInternal::e) { \ return #e[0]; #define ABSL_INTERNAL_X_SEP - ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, - ABSL_INTERNAL_X_SEP) - case FormatConversionChar::kNone: - return '\0'; + ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, + ABSL_INTERNAL_X_SEP) + } else { + return '\0'; + } + #undef ABSL_INTERNAL_X_VAL #undef ABSL_INTERNAL_X_SEP - } - return '\0'; } // The associated char. @@ -224,7 +253,7 @@ inline std::ostream& operator<<(std::ostream& os, FormatConversionChar v) { struct FormatConversionSpecImplFriend; -class FormatConversionSpec { +class FormatConversionSpecImpl { public: // Width and precison are not specified, no flags are set. bool is_basic() const { return flags_.basic; } @@ -237,7 +266,7 @@ class FormatConversionSpec { FormatConversionChar conversion_char() const { // Keep this field first in the struct . It generates better code when // accessing it when ConversionSpec is passed by value in registers. - static_assert(offsetof(FormatConversionSpec, conv_) == 0, ""); + static_assert(offsetof(FormatConversionSpecImpl, conv_) == 0, ""); return conv_; } @@ -248,37 +277,62 @@ class FormatConversionSpec { // negative value. int precision() const { return precision_; } + template <typename T> + T Wrap() { + return T(*this); + } + private: friend struct str_format_internal::FormatConversionSpecImplFriend; - FormatConversionChar conv_ = FormatConversionChar::kNone; + FormatConversionChar conv_ = FormatConversionCharInternal::kNone; Flags flags_; int width_; int precision_; }; struct FormatConversionSpecImplFriend final { - static void SetFlags(Flags f, FormatConversionSpec* conv) { + static void SetFlags(Flags f, FormatConversionSpecImpl* conv) { conv->flags_ = f; } static void SetConversionChar(FormatConversionChar c, - FormatConversionSpec* conv) { + FormatConversionSpecImpl* conv) { conv->conv_ = c; } - static void SetWidth(int w, FormatConversionSpec* conv) { conv->width_ = w; } - static void SetPrecision(int p, FormatConversionSpec* conv) { + static void SetWidth(int w, FormatConversionSpecImpl* conv) { + conv->width_ = w; + } + static void SetPrecision(int p, FormatConversionSpecImpl* conv) { conv->precision_ = p; } - static std::string FlagsToString(const FormatConversionSpec& spec) { + static std::string FlagsToString(const FormatConversionSpecImpl& spec) { return spec.flags_.ToString(); } }; -constexpr uint64_t FormatConversionCharToConvValue(char conv) { +// Type safe OR operator. +// We need this for two reasons: +// 1. operator| on enums makes them decay to integers and the result is an +// integer. We need the result to stay as an enum. +// 2. We use "enum class" which would not work even if we accepted the decay. +constexpr FormatConversionCharSet FormatConversionCharSetUnion( + FormatConversionCharSet a) { + return a; +} + +template <typename... CharSet> +constexpr FormatConversionCharSet FormatConversionCharSetUnion( + FormatConversionCharSet a, CharSet... rest) { + return static_cast<FormatConversionCharSet>( + static_cast<uint64_t>(a) | + static_cast<uint64_t>(FormatConversionCharSetUnion(rest...))); +} + +constexpr uint64_t FormatConversionCharToConvInt(char conv) { return -#define ABSL_INTERNAL_CHAR_SET_CASE(c) \ - conv == #c[0] \ - ? (uint64_t{1} << (1 + static_cast<uint8_t>(FormatConversionChar::c))) \ - : +#define ABSL_INTERNAL_CHAR_SET_CASE(c) \ + conv == #c[0] ? (uint64_t{1} << (1 + static_cast<uint8_t>( \ + FormatConversionCharInternal::c))) \ + : ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, ) #undef ABSL_INTERNAL_CHAR_SET_CASE conv == '*' @@ -286,20 +340,31 @@ constexpr uint64_t FormatConversionCharToConvValue(char conv) { : 0; } -enum class FormatConversionCharSet : uint64_t { -#define ABSL_INTERNAL_CHAR_SET_CASE(c) \ - c = FormatConversionCharToConvValue(#c[0]), +constexpr FormatConversionCharSet FormatConversionCharToConvValue(char conv) { + return static_cast<FormatConversionCharSet>( + FormatConversionCharToConvInt(conv)); +} + +struct FormatConversionCharSetInternal { +#define ABSL_INTERNAL_CHAR_SET_CASE(c) \ + static constexpr FormatConversionCharSet c = \ + FormatConversionCharToConvValue(#c[0]); ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, ) #undef ABSL_INTERNAL_CHAR_SET_CASE // Used for width/precision '*' specification. - kStar = FormatConversionCharToConvValue('*'), - // Some predefined values: - kIntegral = d | i | u | o | x | X, - kFloating = a | e | f | g | A | E | F | G, - kNumeric = kIntegral | kFloating, - kString = s, - kPointer = p + static constexpr FormatConversionCharSet kStar = + FormatConversionCharToConvValue('*'); + + // Some predefined values (TODO(matthewbr), delete any that are unused). + static constexpr FormatConversionCharSet kIntegral = + FormatConversionCharSetUnion(d, i, u, o, x, X); + static constexpr FormatConversionCharSet kFloating = + FormatConversionCharSetUnion(a, e, f, g, A, E, F, G); + static constexpr FormatConversionCharSet kNumeric = + FormatConversionCharSetUnion(kIntegral, kFloating); + static constexpr FormatConversionCharSet kString = s; + static constexpr FormatConversionCharSet kPointer = p; }; // Type safe OR operator. @@ -309,8 +374,7 @@ enum class FormatConversionCharSet : uint64_t { // 2. We use "enum class" which would not work even if we accepted the decay. constexpr FormatConversionCharSet operator|(FormatConversionCharSet a, FormatConversionCharSet b) { - return FormatConversionCharSet(static_cast<uint64_t>(a) | - static_cast<uint64_t>(b)); + return FormatConversionCharSetUnion(a, b); } // Overloaded conversion functions to support absl::ParsedFormat. @@ -331,7 +395,8 @@ void ToFormatConversionCharSet(T) = delete; // Checks whether `c` exists in `set`. constexpr bool Contains(FormatConversionCharSet set, char c) { - return (static_cast<uint64_t>(set) & FormatConversionCharToConvValue(c)) != 0; + return (static_cast<uint64_t>(set) & + static_cast<uint64_t>(FormatConversionCharToConvValue(c))) != 0; } // Checks whether all the characters in `c` are contained in `set` @@ -341,19 +406,6 @@ constexpr bool Contains(FormatConversionCharSet set, static_cast<uint64_t>(c); } -// Return type of the AbslFormatConvert() functions. -// The FormatConversionCharSet template parameter is used to inform the -// framework of what conversion characters are supported by that -// AbslFormatConvert routine. -template <FormatConversionCharSet C> -struct FormatConvertResult { - static constexpr FormatConversionCharSet kConv = C; - bool value; -}; - -template <FormatConversionCharSet C> -constexpr FormatConversionCharSet FormatConvertResult<C>::kConv; - // Return capacity - used, clipped to a minimum of 0. inline size_t Excess(size_t used, size_t capacity) { return used < capacity ? capacity - used : 0; @@ -361,10 +413,85 @@ inline size_t Excess(size_t used, size_t capacity) { // Type alias for use during migration. using ConversionChar = FormatConversionChar; -using ConversionSpec = FormatConversionSpec; +using ConversionSpec = FormatConversionSpecImpl; using Conv = FormatConversionCharSet; -template <FormatConversionCharSet C> -using ConvertResult = FormatConvertResult<C>; + +class FormatConversionSpec { + public: + // Width and precison are not specified, no flags are set. + bool is_basic() const { return impl_.is_basic(); } + bool has_left_flag() const { return impl_.has_left_flag(); } + bool has_show_pos_flag() const { return impl_.has_show_pos_flag(); } + bool has_sign_col_flag() const { return impl_.has_sign_col_flag(); } + bool has_alt_flag() const { return impl_.has_alt_flag(); } + bool has_zero_flag() const { return impl_.has_zero_flag(); } + + FormatConversionChar conversion_char() const { + return impl_.conversion_char(); + } + + // Returns the specified width. If width is unspecfied, it returns a negative + // value. + int width() const { return impl_.width(); } + // Returns the specified precision. If precision is unspecfied, it returns a + // negative value. + int precision() const { return impl_.precision(); } + + private: + explicit FormatConversionSpec( + str_format_internal::FormatConversionSpecImpl impl) + : impl_(impl) {} + + friend str_format_internal::FormatConversionSpecImpl; + + absl::str_format_internal::FormatConversionSpecImpl impl_; +}; + +// clang-format off +enum class FormatConversionChar : uint8_t { + c, C, s, S, // text + d, i, o, u, x, X, // int + f, F, e, E, g, G, a, A, // float + n, p // misc +}; +// clang-format on + +enum class FormatConversionCharSet : uint64_t { + // text + c = str_format_internal::FormatConversionCharToConvInt('c'), + C = str_format_internal::FormatConversionCharToConvInt('C'), + s = str_format_internal::FormatConversionCharToConvInt('s'), + S = str_format_internal::FormatConversionCharToConvInt('S'), + // integer + d = str_format_internal::FormatConversionCharToConvInt('d'), + i = str_format_internal::FormatConversionCharToConvInt('i'), + o = str_format_internal::FormatConversionCharToConvInt('o'), + u = str_format_internal::FormatConversionCharToConvInt('u'), + x = str_format_internal::FormatConversionCharToConvInt('x'), + X = str_format_internal::FormatConversionCharToConvInt('X'), + // Float + f = str_format_internal::FormatConversionCharToConvInt('f'), + F = str_format_internal::FormatConversionCharToConvInt('F'), + e = str_format_internal::FormatConversionCharToConvInt('e'), + E = str_format_internal::FormatConversionCharToConvInt('E'), + g = str_format_internal::FormatConversionCharToConvInt('g'), + G = str_format_internal::FormatConversionCharToConvInt('G'), + a = str_format_internal::FormatConversionCharToConvInt('a'), + A = str_format_internal::FormatConversionCharToConvInt('A'), + // misc + n = str_format_internal::FormatConversionCharToConvInt('n'), + p = str_format_internal::FormatConversionCharToConvInt('p'), + + // Used for width/precision '*' specification. + kStar = str_format_internal::FormatConversionCharToConvInt('*'), + + // Some predefined values: + kIntegral = d | i | u | o | x | X, + kFloating = a | e | f | g | A | E | F | G, + kNumeric = kIntegral | kFloating, + kString = s, + kPointer = p, +}; } // namespace str_format_internal diff --git a/absl/strings/internal/str_format/extension_test.cc b/absl/strings/internal/str_format/extension_test.cc index 561eaa36..0a023f9c 100644 --- a/absl/strings/internal/str_format/extension_test.cc +++ b/absl/strings/internal/str_format/extension_test.cc @@ -80,13 +80,4 @@ TEST(FormatExtensionTest, SinkAppendChars) { EXPECT_EQ(actual, expected); } } - -TEST(FormatExtensionTest, CustomSink) { - my_namespace::UserDefinedType sink; - absl::Format(&sink, "There were %04d little %s.", 3, "pigs"); - EXPECT_EQ("There were 0003 little pigs.", sink.Value()); - absl::Format(&sink, "And %-3llx bad wolf!", 1); - EXPECT_EQ("There were 0003 little pigs.And 1 bad wolf!", sink.Value()); -} - } // namespace diff --git a/absl/strings/internal/str_format/float_conversion.cc b/absl/strings/internal/str_format/float_conversion.cc index d5a1ee40..d6858cff 100644 --- a/absl/strings/internal/str_format/float_conversion.cc +++ b/absl/strings/internal/str_format/float_conversion.cc @@ -403,70 +403,62 @@ bool FloatToSink(const Float v, const ConversionSpec &conv, Buffer buffer; - switch (conv.conversion_char()) { - case ConversionChar::f: - case ConversionChar::F: - if (!FloatToBuffer<FormatStyle::Fixed>(decomposed, precision, &buffer, - nullptr)) { - return FallbackToSnprintf(v, conv, sink); - } - if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back(); - break; + FormatConversionChar c = conv.conversion_char(); - case ConversionChar::e: - case ConversionChar::E: - if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer, - &exp)) { - return FallbackToSnprintf(v, conv, sink); + if (c == FormatConversionCharInternal::f || + c == FormatConversionCharInternal::F) { + if (!FloatToBuffer<FormatStyle::Fixed>(decomposed, precision, &buffer, + nullptr)) { + return FallbackToSnprintf(v, conv, sink); + } + if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back(); + } else if (c == FormatConversionCharInternal::e || + c == FormatConversionCharInternal::E) { + if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer, + &exp)) { + return FallbackToSnprintf(v, conv, sink); + } + if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back(); + PrintExponent( + exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e', + &buffer); + } else if (c == FormatConversionCharInternal::g || + c == FormatConversionCharInternal::G) { + precision = std::max(0, precision - 1); + if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer, + &exp)) { + return FallbackToSnprintf(v, conv, sink); + } + if (precision + 1 > exp && exp >= -4) { + if (exp < 0) { + // Have 1.23456, needs 0.00123456 + // Move the first digit + buffer.begin[1] = *buffer.begin; + // Add some zeros + for (; exp < -1; ++exp) *buffer.begin-- = '0'; + *buffer.begin-- = '.'; + *buffer.begin = '0'; + } else if (exp > 0) { + // Have 1.23456, needs 1234.56 + // Move the '.' exp positions to the right. + std::rotate(buffer.begin + 1, buffer.begin + 2, buffer.begin + exp + 2); } - if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back(); + exp = 0; + } + if (!conv.has_alt_flag()) { + while (buffer.back() == '0') buffer.pop_back(); + if (buffer.back() == '.') buffer.pop_back(); + } + if (exp) { PrintExponent( exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e', &buffer); - break; - - case ConversionChar::g: - case ConversionChar::G: - precision = std::max(0, precision - 1); - if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer, - &exp)) { - return FallbackToSnprintf(v, conv, sink); - } - if (precision + 1 > exp && exp >= -4) { - if (exp < 0) { - // Have 1.23456, needs 0.00123456 - // Move the first digit - buffer.begin[1] = *buffer.begin; - // Add some zeros - for (; exp < -1; ++exp) *buffer.begin-- = '0'; - *buffer.begin-- = '.'; - *buffer.begin = '0'; - } else if (exp > 0) { - // Have 1.23456, needs 1234.56 - // Move the '.' exp positions to the right. - std::rotate(buffer.begin + 1, buffer.begin + 2, - buffer.begin + exp + 2); - } - exp = 0; - } - if (!conv.has_alt_flag()) { - while (buffer.back() == '0') buffer.pop_back(); - if (buffer.back() == '.') buffer.pop_back(); - } - if (exp) { - PrintExponent( - exp, - FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e', - &buffer); - } - break; - - case ConversionChar::a: - case ConversionChar::A: - return FallbackToSnprintf(v, conv, sink); - - default: - return false; + } + } else if (c == FormatConversionCharInternal::a || + c == FormatConversionCharInternal::A) { + return FallbackToSnprintf(v, conv, sink); + } else { + return false; } WriteBufferToSink(sign_char, diff --git a/absl/strings/internal/str_format/parser.cc b/absl/strings/internal/str_format/parser.cc index aab68db9..61132739 100644 --- a/absl/strings/internal/str_format/parser.cc +++ b/absl/strings/internal/str_format/parser.cc @@ -17,7 +17,7 @@ namespace absl { ABSL_NAMESPACE_BEGIN namespace str_format_internal { -using CC = ConversionChar; +using CC = FormatConversionCharInternal; using LM = LengthMod; ABSL_CONST_INIT const ConvTag kTags[256] = { @@ -296,15 +296,17 @@ struct ParsedFormatBase::ParsedFormatConsumer { char* data_pos; }; -ParsedFormatBase::ParsedFormatBase(string_view format, bool allow_ignored, - std::initializer_list<Conv> convs) +ParsedFormatBase::ParsedFormatBase( + string_view format, bool allow_ignored, + std::initializer_list<FormatConversionCharSet> convs) : data_(format.empty() ? nullptr : new char[format.size()]) { has_error_ = !ParseFormatString(format, ParsedFormatConsumer(this)) || !MatchesConversions(allow_ignored, convs); } bool ParsedFormatBase::MatchesConversions( - bool allow_ignored, std::initializer_list<Conv> convs) const { + bool allow_ignored, + std::initializer_list<FormatConversionCharSet> convs) const { std::unordered_set<int> used; auto add_if_valid_conv = [&](int pos, char c) { if (static_cast<size_t>(pos) > convs.size() || diff --git a/absl/strings/internal/str_format/parser.h b/absl/strings/internal/str_format/parser.h index 7d966517..fd2dc970 100644 --- a/absl/strings/internal/str_format/parser.h +++ b/absl/strings/internal/str_format/parser.h @@ -67,7 +67,7 @@ struct UnboundConversion { Flags flags; LengthMod length_mod = LengthMod::none; - ConversionChar conv = FormatConversionChar::kNone; + FormatConversionChar conv = FormatConversionCharInternal::kNone; }; // Consume conversion spec prefix (not including '%') of [p, end) if valid. @@ -186,8 +186,9 @@ constexpr bool EnsureConstexpr(string_view s) { class ParsedFormatBase { public: - explicit ParsedFormatBase(string_view format, bool allow_ignored, - std::initializer_list<Conv> convs); + explicit ParsedFormatBase( + string_view format, bool allow_ignored, + std::initializer_list<FormatConversionCharSet> convs); ParsedFormatBase(const ParsedFormatBase& other) { *this = other; } @@ -234,8 +235,9 @@ class ParsedFormatBase { private: // Returns whether the conversions match and if !allow_ignored it verifies // that all conversions are used by the format. - bool MatchesConversions(bool allow_ignored, - std::initializer_list<Conv> convs) const; + bool MatchesConversions( + bool allow_ignored, + std::initializer_list<FormatConversionCharSet> convs) const; struct ParsedFormatConsumer; diff --git a/absl/strings/internal/str_format/parser_test.cc b/absl/strings/internal/str_format/parser_test.cc index 51eb53f5..26f5bec6 100644 --- a/absl/strings/internal/str_format/parser_test.cc +++ b/absl/strings/internal/str_format/parser_test.cc @@ -46,13 +46,13 @@ TEST(ConversionCharTest, Names) { }; // clang-format off const Expectation kExpect[] = { -#define X(c) {ConversionChar::c, #c[0]} +#define X(c) {FormatConversionCharInternal::c, #c[0]} X(c), X(C), X(s), X(S), // text X(d), X(i), X(o), X(u), X(x), X(X), // int X(f), X(F), X(e), X(E), X(g), X(G), X(a), X(A), // float X(n), X(p), // misc #undef X - {ConversionChar::kNone, '\0'}, + {FormatConversionCharInternal::kNone, '\0'}, }; // clang-format on for (auto e : kExpect) { @@ -349,7 +349,8 @@ TEST_F(ParsedFormatTest, ValueSemantics) { ParsedFormatBase p2 = p1; // copy construct (empty) EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p2)); - p1 = ParsedFormatBase("hello%s", true, {Conv::s}); // move assign + p1 = ParsedFormatBase("hello%s", true, + {FormatConversionCharSetInternal::s}); // move assign EXPECT_EQ("[hello]{s:1$s}", SummarizeParsedFormat(p1)); ParsedFormatBase p3 = p1; // copy construct (nonempty) @@ -377,9 +378,9 @@ TEST_F(ParsedFormatTest, Parsing) { const ExpectParse kExpect[] = { {"", {}, ""}, {"ab", {}, "[ab]"}, - {"a%d", {Conv::d}, "[a]{d:1$d}"}, - {"a%+d", {Conv::d}, "[a]{+d:1$d}"}, - {"a% d", {Conv::d}, "[a]{ d:1$d}"}, + {"a%d", {FormatConversionCharSetInternal::d}, "[a]{d:1$d}"}, + {"a%+d", {FormatConversionCharSetInternal::d}, "[a]{+d:1$d}"}, + {"a% d", {FormatConversionCharSetInternal::d}, "[a]{ d:1$d}"}, {"a%b %d", {}, "[a]!"}, // stop after error }; for (const auto& e : kExpect) { @@ -391,13 +392,13 @@ TEST_F(ParsedFormatTest, Parsing) { TEST_F(ParsedFormatTest, ParsingFlagOrder) { const ExpectParse kExpect[] = { - {"a%+ 0d", {Conv::d}, "[a]{+ 0d:1$d}"}, - {"a%+0 d", {Conv::d}, "[a]{+0 d:1$d}"}, - {"a%0+ d", {Conv::d}, "[a]{0+ d:1$d}"}, - {"a% +0d", {Conv::d}, "[a]{ +0d:1$d}"}, - {"a%0 +d", {Conv::d}, "[a]{0 +d:1$d}"}, - {"a% 0+d", {Conv::d}, "[a]{ 0+d:1$d}"}, - {"a%+ 0+d", {Conv::d}, "[a]{+ 0+d:1$d}"}, + {"a%+ 0d", {FormatConversionCharSetInternal::d}, "[a]{+ 0d:1$d}"}, + {"a%+0 d", {FormatConversionCharSetInternal::d}, "[a]{+0 d:1$d}"}, + {"a%0+ d", {FormatConversionCharSetInternal::d}, "[a]{0+ d:1$d}"}, + {"a% +0d", {FormatConversionCharSetInternal::d}, "[a]{ +0d:1$d}"}, + {"a%0 +d", {FormatConversionCharSetInternal::d}, "[a]{0 +d:1$d}"}, + {"a% 0+d", {FormatConversionCharSetInternal::d}, "[a]{ 0+d:1$d}"}, + {"a%+ 0+d", {FormatConversionCharSetInternal::d}, "[a]{+ 0+d:1$d}"}, }; for (const auto& e : kExpect) { SCOPED_TRACE(e.in); diff --git a/absl/strings/str_format_test.cc b/absl/strings/str_format_test.cc index f0d1f0ad..160f4c61 100644 --- a/absl/strings/str_format_test.cc +++ b/absl/strings/str_format_test.cc @@ -450,7 +450,7 @@ struct SummarizeConsumer { if (conv.precision.is_from_arg()) { *out += "." + std::to_string(conv.precision.get_from_arg()) + "$*"; } - *out += FormatConversionCharToChar(conv.conv); + *out += str_format_internal::FormatConversionCharToChar(conv.conv); *out += "}"; return true; } diff --git a/absl/synchronization/internal/create_thread_identity.cc b/absl/synchronization/internal/create_thread_identity.cc index fa0070a9..53a71b34 100644 --- a/absl/synchronization/internal/create_thread_identity.cc +++ b/absl/synchronization/internal/create_thread_identity.cc @@ -32,9 +32,9 @@ namespace synchronization_internal { // ThreadIdentity storage is persistent, we maintain a free-list of previously // released ThreadIdentity objects. -static base_internal::SpinLock freelist_lock( - base_internal::kLinkerInitialized); -static base_internal::ThreadIdentity* thread_identity_freelist; +ABSL_CONST_INIT static base_internal::SpinLock freelist_lock( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); +ABSL_CONST_INIT static base_internal::ThreadIdentity* thread_identity_freelist; // A per-thread destructor for reclaiming associated ThreadIdentity objects. // Since we must preserve their storage we cache them for re-use. diff --git a/absl/synchronization/internal/graphcycles.cc b/absl/synchronization/internal/graphcycles.cc index 6a2bcdf6..19f9aab5 100644 --- a/absl/synchronization/internal/graphcycles.cc +++ b/absl/synchronization/internal/graphcycles.cc @@ -51,9 +51,9 @@ namespace { // Avoid LowLevelAlloc's default arena since it calls malloc hooks in // which people are doing things like acquiring Mutexes. -static absl::base_internal::SpinLock arena_mu( - absl::base_internal::kLinkerInitialized); -static base_internal::LowLevelAlloc::Arena* arena; +ABSL_CONST_INIT static absl::base_internal::SpinLock arena_mu( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); +ABSL_CONST_INIT static base_internal::LowLevelAlloc::Arena* arena; static void InitArenaIfNecessary() { arena_mu.Lock(); diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc index 8cda5a1c..1f8a696e 100644 --- a/absl/synchronization/mutex.cc +++ b/absl/synchronization/mutex.cc @@ -207,12 +207,12 @@ static void AtomicClearBits(std::atomic<intptr_t>* pv, intptr_t bits, //------------------------------------------------------------------ // Data for doing deadlock detection. -static absl::base_internal::SpinLock deadlock_graph_mu( - absl::base_internal::kLinkerInitialized); +ABSL_CONST_INIT static absl::base_internal::SpinLock deadlock_graph_mu( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); -// graph used to detect deadlocks. -static GraphCycles *deadlock_graph ABSL_GUARDED_BY(deadlock_graph_mu) - ABSL_PT_GUARDED_BY(deadlock_graph_mu); +// Graph used to detect deadlocks. +ABSL_CONST_INIT static GraphCycles *deadlock_graph + ABSL_GUARDED_BY(deadlock_graph_mu) ABSL_PT_GUARDED_BY(deadlock_graph_mu); //------------------------------------------------------------------ // An event mechanism for debugging mutex use. @@ -273,13 +273,12 @@ static const struct { {0, "SignalAll on "}, }; -static absl::base_internal::SpinLock synch_event_mu( - absl::base_internal::kLinkerInitialized); -// protects synch_event +ABSL_CONST_INIT static absl::base_internal::SpinLock synch_event_mu( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); // Hash table size; should be prime > 2. // Can't be too small, as it's used for deadlock detection information. -static const uint32_t kNSynchEvent = 1031; +static constexpr uint32_t kNSynchEvent = 1031; static struct SynchEvent { // this is a trivial hash table for the events // struct is freed when refcount reaches 0 diff --git a/absl/time/clock.cc b/absl/time/clock.cc index 3b895c38..e5c423c7 100644 --- a/absl/time/clock.cc +++ b/absl/time/clock.cc @@ -226,9 +226,9 @@ static_assert(((kMinNSBetweenSamples << (kScale + 1)) >> (kScale + 1)) == // A reader-writer lock protecting the static locations below. // See SeqAcquire() and SeqRelease() above. -static absl::base_internal::SpinLock lock( - absl::base_internal::kLinkerInitialized); -static std::atomic<uint64_t> seq(0); +ABSL_CONST_INIT static absl::base_internal::SpinLock lock( + absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY); +ABSL_CONST_INIT static std::atomic<uint64_t> seq(0); // data from a sample of the kernel's time value struct TimeSampleAtomic { diff --git a/absl/time/internal/cctz/src/cctz_benchmark.cc b/absl/time/internal/cctz/src/cctz_benchmark.cc index d30a644e..a402760d 100644 --- a/absl/time/internal/cctz/src/cctz_benchmark.cc +++ b/absl/time/internal/cctz/src/cctz_benchmark.cc @@ -280,6 +280,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan", "America/North_Dakota/Beulah", "America/North_Dakota/Center", "America/North_Dakota/New_Salem", + "America/Nuuk", "America/Ojinaga", "America/Panama", "America/Pangnirtung", diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc index 35911ce5..0b0c1a3b 100644 --- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc +++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc @@ -211,6 +211,7 @@ const char* const kTimeZoneNames[] = {"Africa/Abidjan", "America/North_Dakota/Beulah", "America/North_Dakota/Center", "America/North_Dakota/New_Salem", + "America/Nuuk", "America/Ojinaga", "America/Panama", "America/Pangnirtung", |