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merge(3p/abseil_cpp): Merge upstream at 'ccdbb5941'

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Change-Id: I6e85fc7b5f76bba1f1eef15e600a8acb64e97ef5
This commit is contained in:
Vincent Ambo 2020-06-17 14:53:11 +01:00
commit 543379ce45
97 changed files with 3546 additions and 2316 deletions
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34
third_party/abseil_cpp/absl/flags/internal/commandlineflag.cc vendored
View file

@ -1,34 +0,0 @@
//
// Copyright 2020 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/flags/internal/commandlineflag.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
FlagStateInterface::~FlagStateInterface() {}
bool CommandLineFlag::IsRetired() const { return false; }
bool CommandLineFlag::ParseFrom(absl::string_view value, std::string* error) {
return ParseFrom(value, flags_internal::SET_FLAGS_VALUE,
flags_internal::kProgrammaticChange, error);
}
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl

119
third_party/abseil_cpp/absl/flags/internal/commandlineflag.h vendored
View file

@ -16,14 +16,8 @@
#ifndef ABSL_FLAGS_INTERNAL_COMMANDLINEFLAG_H_
#define ABSL_FLAGS_INTERNAL_COMMANDLINEFLAG_H_
#include <memory>
#include <string>
#include "absl/base/config.h"
#include "absl/base/internal/fast_type_id.h"
#include "absl/base/macros.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
@ -34,7 +28,7 @@ namespace flags_internal {
// cases this id is enough to uniquely identify the flag's value type. In a few
// cases we'll have to resort to using actual RTTI implementation if it is
// available.
using FlagFastTypeId = base_internal::FastTypeIdType;
using FlagFastTypeId = absl::base_internal::FastTypeIdType;
// Options that control SetCommandLineOptionWithMode.
enum FlagSettingMode {
@ -67,117 +61,6 @@ class FlagStateInterface {
virtual void Restore() const = 0;
};
// Holds all information for a flag.
class CommandLineFlag {
public:
constexpr CommandLineFlag() = default;
// Not copyable/assignable.
CommandLineFlag(const CommandLineFlag&) = delete;
CommandLineFlag& operator=(const CommandLineFlag&) = delete;
// Non-polymorphic access methods.
// Return true iff flag has type T.
template <typename T>
inline bool IsOfType() const {
return TypeId() == base_internal::FastTypeId<T>();
}
// Attempts to retrieve the flag value. Returns value on success,
// absl::nullopt otherwise.
template <typename T>
absl::optional<T> TryGet() const {
if (IsRetired() || !IsOfType<T>()) {
return absl::nullopt;
}
// Implementation notes:
//
// We are wrapping a union around the value of `T` to serve three purposes:
//
// 1. `U.value` has correct size and alignment for a value of type `T`
// 2. The `U.value` constructor is not invoked since U's constructor does
// not do it explicitly.
// 3. The `U.value` destructor is invoked since U's destructor does it
// explicitly. This makes `U` a kind of RAII wrapper around non default
// constructible value of T, which is destructed when we leave the
// scope. We do need to destroy U.value, which is constructed by
// CommandLineFlag::Read even though we left it in a moved-from state
// after std::move.
//
// All of this serves to avoid requiring `T` being default constructible.
union U {
T value;
U() {}
~U() { value.~T(); }
};
U u;
Read(&u.value);
return std::move(u.value);
}
// Polymorphic access methods
// Returns name of this flag.
virtual absl::string_view Name() const = 0;
// Returns name of the file where this flag is defined.
virtual std::string Filename() 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;
virtual std::string DefaultValue() const = 0;
virtual std::string CurrentValue() const = 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.
bool ParseFrom(absl::string_view value, std::string* error);
protected:
~CommandLineFlag() = default;
private:
friend class PrivateHandleAccessor;
// 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
// are three ways to set the flag's value:
// * Update the current flag value
// * Update the flag's default value
// * Update the current flag value if it was never set before
// The mode is selected based on `set_mode` parameter.
virtual bool ParseFrom(absl::string_view value,
flags_internal::FlagSettingMode set_mode,
flags_internal::ValueSource source,
std::string* error) = 0;
// 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;
// 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;
// Checks that flags default value can be converted to string and back to the
// flag's value type.
virtual void CheckDefaultValueParsingRoundtrip() const = 0;
};
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl

233
third_party/abseil_cpp/absl/flags/internal/commandlineflag_test.cc vendored
View file

@ -1,233 +0,0 @@
//
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/flags/internal/commandlineflag.h"
#include <memory>
#include <string>
#include "gtest/gtest.h"
#include "absl/flags/flag.h"
#include "absl/flags/internal/private_handle_accessor.h"
#include "absl/flags/internal/registry.h"
#include "absl/flags/usage_config.h"
#include "absl/memory/memory.h"
#include "absl/strings/match.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
ABSL_FLAG(int, int_flag, 201, "int_flag help");
ABSL_FLAG(std::string, string_flag, "dflt",
absl::StrCat("string_flag", " help"));
ABSL_RETIRED_FLAG(bool, bool_retired_flag, false, "bool_retired_flag help");
namespace {
namespace flags = absl::flags_internal;
class CommandLineFlagTest : public testing::Test {
protected:
static void SetUpTestSuite() {
// Install a function to normalize filenames before this test is run.
absl::FlagsUsageConfig default_config;
default_config.normalize_filename = &CommandLineFlagTest::NormalizeFileName;
absl::SetFlagsUsageConfig(default_config);
}
void SetUp() override { flag_saver_ = absl::make_unique<flags::FlagSaver>(); }
void TearDown() override { flag_saver_.reset(); }
private:
static std::string NormalizeFileName(absl::string_view fname) {
#ifdef _WIN32
std::string normalized(fname);
std::replace(normalized.begin(), normalized.end(), '\\', '/');
fname = normalized;
#endif
return std::string(fname);
}
std::unique_ptr<flags::FlagSaver> flag_saver_;
};
TEST_F(CommandLineFlagTest, TestAttributesAccessMethods) {
auto* flag_01 = flags::FindCommandLineFlag("int_flag");
ASSERT_TRUE(flag_01);
EXPECT_EQ(flag_01->Name(), "int_flag");
EXPECT_EQ(flag_01->Help(), "int_flag help");
EXPECT_TRUE(!flag_01->IsRetired());
EXPECT_TRUE(flag_01->IsOfType<int>());
EXPECT_TRUE(
absl::EndsWith(flag_01->Filename(),
"absl/flags/internal/commandlineflag_test.cc"))
<< flag_01->Filename();
auto* flag_02 = flags::FindCommandLineFlag("string_flag");
ASSERT_TRUE(flag_02);
EXPECT_EQ(flag_02->Name(), "string_flag");
EXPECT_EQ(flag_02->Help(), "string_flag help");
EXPECT_TRUE(!flag_02->IsRetired());
EXPECT_TRUE(flag_02->IsOfType<std::string>());
EXPECT_TRUE(
absl::EndsWith(flag_02->Filename(),
"absl/flags/internal/commandlineflag_test.cc"))
<< flag_02->Filename();
auto* flag_03 = flags::FindRetiredFlag("bool_retired_flag");
ASSERT_TRUE(flag_03);
EXPECT_EQ(flag_03->Name(), "bool_retired_flag");
EXPECT_EQ(flag_03->Help(), "");
EXPECT_TRUE(flag_03->IsRetired());
EXPECT_TRUE(flag_03->IsOfType<bool>());
EXPECT_EQ(flag_03->Filename(), "RETIRED");
}
// --------------------------------------------------------------------
TEST_F(CommandLineFlagTest, TestValueAccessMethods) {
absl::SetFlag(&FLAGS_int_flag, 301);
auto* flag_01 = flags::FindCommandLineFlag("int_flag");
ASSERT_TRUE(flag_01);
EXPECT_EQ(flag_01->CurrentValue(), "301");
EXPECT_EQ(flag_01->DefaultValue(), "201");
absl::SetFlag(&FLAGS_string_flag, "new_str_value");
auto* flag_02 = flags::FindCommandLineFlag("string_flag");
ASSERT_TRUE(flag_02);
EXPECT_EQ(flag_02->CurrentValue(), "new_str_value");
EXPECT_EQ(flag_02->DefaultValue(), "dflt");
}
// --------------------------------------------------------------------
TEST_F(CommandLineFlagTest, TestParseFromCurrentValue) {
std::string err;
auto* flag_01 = flags::FindCommandLineFlag("int_flag");
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(
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(
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(
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(
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(
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(flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
flag_01, "", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, &err));
EXPECT_EQ(err, "Illegal value '' specified for flag 'int_flag'");
auto* flag_02 = flags::FindCommandLineFlag("string_flag");
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_02, "xyz", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
&err));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "xyz");
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_02, "", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, &err));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "");
}
// --------------------------------------------------------------------
TEST_F(CommandLineFlagTest, TestParseFromDefaultValue) {
std::string err;
auto* flag_01 = flags::FindCommandLineFlag("int_flag");
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_01, "111", flags::SET_FLAGS_DEFAULT, flags::kProgrammaticChange,
&err));
EXPECT_EQ(flag_01->DefaultValue(), "111");
auto* flag_02 = flags::FindCommandLineFlag("string_flag");
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_02, "abc", flags::SET_FLAGS_DEFAULT, flags::kProgrammaticChange,
&err));
EXPECT_EQ(flag_02->DefaultValue(), "abc");
}
// --------------------------------------------------------------------
TEST_F(CommandLineFlagTest, TestParseFromIfDefault) {
std::string err;
auto* flag_01 = flags::FindCommandLineFlag("int_flag");
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_01, "22", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
&err))
<< err;
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 22);
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_01, "33", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
&err));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 22);
// EXPECT_EQ(err, "ERROR: int_flag is already set to 22");
// Reset back to default value
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_01, "201", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
&err));
EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
flag_01, "33", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
&err));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 201);
// EXPECT_EQ(err, "ERROR: int_flag is already set to 201");
}
} // namespace

48
third_party/abseil_cpp/absl/flags/internal/flag.cc vendored
View file

@ -15,22 +15,26 @@
#include "absl/flags/internal/flag.h"
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <array>
#include <atomic>
#include <memory>
#include <new>
#include <string>
#include <vector>
#include <typeinfo>
#include "absl/base/attributes.h"
#include "absl/base/call_once.h"
#include "absl/base/casts.h"
#include "absl/base/config.h"
#include "absl/base/const_init.h"
#include "absl/base/optimization.h"
#include "absl/flags/config.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/usage_config.h"
#include "absl/memory/memory.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/synchronization/mutex.h"
@ -63,14 +67,14 @@ bool ShouldValidateFlagValue(FlagFastTypeId flag_type_id) {
// need to acquire these locks themselves.
class MutexRelock {
public:
explicit MutexRelock(absl::Mutex* mu) : mu_(mu) { mu_->Unlock(); }
~MutexRelock() { mu_->Lock(); }
explicit MutexRelock(absl::Mutex& mu) : mu_(mu) { mu_.Unlock(); }
~MutexRelock() { mu_.Lock(); }
MutexRelock(const MutexRelock&) = delete;
MutexRelock& operator=(const MutexRelock&) = delete;
private:
absl::Mutex* mu_;
absl::Mutex& mu_;
};
} // namespace
@ -83,7 +87,7 @@ class FlagImpl;
class FlagState : public flags_internal::FlagStateInterface {
public:
template <typename V>
FlagState(FlagImpl* flag_impl, const V& v, bool modified,
FlagState(FlagImpl& flag_impl, const V& v, bool modified,
bool on_command_line, int64_t counter)
: flag_impl_(flag_impl),
value_(v),
@ -92,9 +96,9 @@ class FlagState : public flags_internal::FlagStateInterface {
counter_(counter) {}
~FlagState() override {
if (flag_impl_->ValueStorageKind() != FlagValueStorageKind::kAlignedBuffer)
if (flag_impl_.ValueStorageKind() != FlagValueStorageKind::kAlignedBuffer)
return;
flags_internal::Delete(flag_impl_->op_, value_.heap_allocated);
flags_internal::Delete(flag_impl_.op_, value_.heap_allocated);
}
private:
@ -102,15 +106,15 @@ class FlagState : public flags_internal::FlagStateInterface {
// Restores the flag to the saved state.
void Restore() const override {
if (!flag_impl_->RestoreState(*this)) return;
if (!flag_impl_.RestoreState(*this)) return;
ABSL_INTERNAL_LOG(
INFO, absl::StrCat("Restore saved value of ", flag_impl_->Name(),
" to: ", flag_impl_->CurrentValue()));
ABSL_INTERNAL_LOG(INFO,
absl::StrCat("Restore saved value of ", flag_impl_.Name(),
" to: ", flag_impl_.CurrentValue()));
}
// Flag and saved flag data.
FlagImpl* flag_impl_;
FlagImpl& flag_impl_;
union SavedValue {
explicit SavedValue(void* v) : heap_allocated(v) {}
explicit SavedValue(int64_t v) : one_word(v) {}
@ -327,7 +331,7 @@ void FlagImpl::InvokeCallback() const {
// and it also can be different by the time the callback invocation is
// completed. Requires that *primary_lock be held in exclusive mode; it may be
// released and reacquired by the implementation.
MutexRelock relock(DataGuard());
MutexRelock relock(*DataGuard());
absl::MutexLock lock(&callback_->guard);
cb();
}
@ -340,17 +344,17 @@ std::unique_ptr<FlagStateInterface> FlagImpl::SaveState() {
switch (ValueStorageKind()) {
case FlagValueStorageKind::kAlignedBuffer: {
return absl::make_unique<FlagState>(
this, flags_internal::Clone(op_, AlignedBufferValue()), modified,
*this, flags_internal::Clone(op_, AlignedBufferValue()), modified,
on_command_line, counter_);
}
case FlagValueStorageKind::kOneWordAtomic: {
return absl::make_unique<FlagState>(
this, OneWordValue().load(std::memory_order_acquire), modified,
*this, OneWordValue().load(std::memory_order_acquire), modified,
on_command_line, counter_);
}
case FlagValueStorageKind::kTwoWordsAtomic: {
return absl::make_unique<FlagState>(
this, TwoWordsValue().load(std::memory_order_acquire), modified,
*this, TwoWordsValue().load(std::memory_order_acquire), modified,
on_command_line, counter_);
}
}
@ -411,14 +415,14 @@ std::atomic<AlignedTwoWords>& FlagImpl::TwoWordsValue() const {
// parsed value. In case if any error is encountered in either step, the error
// message is stored in 'err'
std::unique_ptr<void, DynValueDeleter> FlagImpl::TryParse(
absl::string_view value, std::string* err) const {
absl::string_view value, std::string& err) const {
std::unique_ptr<void, DynValueDeleter> tentative_value = MakeInitValue();
std::string parse_err;
if (!flags_internal::Parse(op_, value, tentative_value.get(), &parse_err)) {
absl::string_view err_sep = parse_err.empty() ? "" : "; ";
*err = absl::StrCat("Illegal value '", value, "' specified for flag '",
Name(), "'", err_sep, parse_err);
err = absl::StrCat("Illegal value '", value, "' specified for flag '",
Name(), "'", err_sep, parse_err);
return nullptr;
}
@ -474,7 +478,7 @@ void FlagImpl::Write(const void* src) {
// * Update the current flag value if it was never set before
// The mode is selected based on 'set_mode' parameter.
bool FlagImpl::ParseFrom(absl::string_view value, FlagSettingMode set_mode,
ValueSource source, std::string* err) {
ValueSource source, std::string& err) {
absl::MutexLock l(DataGuard());
switch (set_mode) {

105
third_party/abseil_cpp/absl/flags/internal/flag.h vendored
View file

@ -16,31 +16,36 @@
#ifndef ABSL_FLAGS_INTERNAL_FLAG_H_
#define ABSL_FLAGS_INTERNAL_FLAG_H_
#include <stddef.h>
#include <stdint.h>
#include <atomic>
#include <cstring>
#include <memory>
#include <new>
#include <string>
#include <type_traits>
#include <typeinfo>
#include "absl/base/attributes.h"
#include "absl/base/call_once.h"
#include "absl/base/config.h"
#include "absl/base/optimization.h"
#include "absl/base/thread_annotations.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/config.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/registry.h"
#include "absl/flags/marshalling.h"
#include "absl/memory/memory.h"
#include "absl/meta/type_traits.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/synchronization/mutex.h"
#include "absl/utility/utility.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
///////////////////////////////////////////////////////////////////////////////
// Forward declaration of absl::Flag<T> public API.
namespace flags_internal {
template <typename T>
@ -64,12 +69,15 @@ void SetFlag(absl::Flag<T>* flag, const T& v);
template <typename T, typename V>
void SetFlag(absl::Flag<T>* flag, const V& v);
namespace flags_internal {
template <typename U>
const CommandLineFlag& GetFlagReflectionHandle(const absl::Flag<U>& f);
///////////////////////////////////////////////////////////////////////////////
// Flag value type operations, eg., parsing, copying, etc. are provided
// by function specific to that type with a signature matching FlagOpFn.
namespace flags_internal {
enum class FlagOp {
kAlloc,
kDelete,
@ -168,6 +176,28 @@ inline const std::type_info* GenRuntimeTypeId() {
// cases.
using HelpGenFunc = std::string (*)();
template <size_t N>
struct FixedCharArray {
char value[N];
template <size_t... I>
static constexpr FixedCharArray<N> FromLiteralString(
absl::string_view str, absl::index_sequence<I...>) {
return (void)str, FixedCharArray<N>({{str[I]..., '\0'}});
}
};
template <typename Gen, size_t N = Gen::Value().size()>
constexpr FixedCharArray<N + 1> HelpStringAsArray(int) {
return FixedCharArray<N + 1>::FromLiteralString(
Gen::Value(), absl::make_index_sequence<N>{});
}
template <typename Gen>
constexpr std::false_type HelpStringAsArray(char) {
return std::false_type{};
}
union FlagHelpMsg {
constexpr explicit FlagHelpMsg(const char* help_msg) : literal(help_msg) {}
constexpr explicit FlagHelpMsg(HelpGenFunc help_gen) : gen_func(help_gen) {}
@ -185,40 +215,28 @@ struct FlagHelpArg {
extern const char kStrippedFlagHelp[];
// HelpConstexprWrap is used by struct AbslFlagHelpGenFor##name generated by
// ABSL_FLAG macro. It is only used to silence the compiler in the case where
// help message expression is not constexpr and does not have type const char*.
// If help message expression is indeed constexpr const char* HelpConstexprWrap
// is just a trivial identity function.
template <typename T>
const char* HelpConstexprWrap(const T&) {
return nullptr;
}
constexpr const char* HelpConstexprWrap(const char* p) { return p; }
constexpr const char* HelpConstexprWrap(char* p) { return p; }
// These two HelpArg overloads allows us to select at compile time one of two
// way to pass Help argument to absl::Flag. We'll be passing
// AbslFlagHelpGenFor##name as T and integer 0 as a single argument to prefer
// first overload if possible. If T::Const is evaluatable on constexpr
// context (see non template int parameter below) we'll choose first overload.
// In this case the help message expression is immediately evaluated and is used
// to construct the absl::Flag. No additionl code is generated by ABSL_FLAG.
// Otherwise SFINAE kicks in and first overload is dropped from the
// AbslFlagHelpGenFor##name as Gen and integer 0 as a single argument to prefer
// first overload if possible. If help message is evaluatable on constexpr
// context We'll be able to make FixedCharArray out of it and we'll choose first
// overload. In this case the help message expression is immediately evaluated
// and is used to construct the absl::Flag. No additionl code is generated by
// ABSL_FLAG Otherwise SFINAE kicks in and first overload is dropped from the
// consideration, in which case the second overload will be used. The second
// overload does not attempt to evaluate the help message expression
// immediately and instead delays the evaluation by returing the function
// pointer (&T::NonConst) genering the help message when necessary. This is
// evaluatable in constexpr context, but the cost is an extra function being
// generated in the ABSL_FLAG code.
template <typename T, int = (T::Const(), 1)>
constexpr FlagHelpArg HelpArg(int) {
return {FlagHelpMsg(T::Const()), FlagHelpKind::kLiteral};
template <typename Gen, size_t N>
constexpr FlagHelpArg HelpArg(const FixedCharArray<N>& value) {
return {FlagHelpMsg(value.value), FlagHelpKind::kLiteral};
}
template <typename T>
constexpr FlagHelpArg HelpArg(char) {
return {FlagHelpMsg(&T::NonConst), FlagHelpKind::kGenFunc};
template <typename Gen>
constexpr FlagHelpArg HelpArg(std::false_type) {
return {FlagHelpMsg(&Gen::NonConst), FlagHelpKind::kGenFunc};
}
///////////////////////////////////////////////////////////////////////////////
@ -364,31 +382,31 @@ struct FlagValue;
template <typename T>
struct FlagValue<T, FlagValueStorageKind::kAlignedBuffer> {
bool Get(T*) const { return false; }
bool Get(T&) const { return false; }
alignas(T) char value[sizeof(T)];
};
template <typename T>
struct FlagValue<T, FlagValueStorageKind::kOneWordAtomic> : FlagOneWordValue {
bool Get(T* dst) const {
bool Get(T& dst) const {
int64_t one_word_val = value.load(std::memory_order_acquire);
if (ABSL_PREDICT_FALSE(one_word_val == UninitializedFlagValue())) {
return false;
}
std::memcpy(dst, static_cast<const void*>(&one_word_val), sizeof(T));
std::memcpy(&dst, static_cast<const void*>(&one_word_val), sizeof(T));
return true;
}
};
template <typename T>
struct FlagValue<T, FlagValueStorageKind::kTwoWordsAtomic> : FlagTwoWordsValue {
bool Get(T* dst) const {
bool Get(T& dst) const {
AlignedTwoWords two_words_val = value.load(std::memory_order_acquire);
if (ABSL_PREDICT_FALSE(!two_words_val.IsInitialized())) {
return false;
}
std::memcpy(dst, static_cast<const void*>(&two_words_val), sizeof(T));
std::memcpy(&dst, static_cast<const void*>(&two_words_val), sizeof(T));
return true;
}
};
@ -419,7 +437,7 @@ struct DynValueDeleter {
class FlagState;
class FlagImpl final : public flags_internal::CommandLineFlag {
class FlagImpl final : public CommandLineFlag {
public:
constexpr FlagImpl(const char* name, const char* filename, FlagOpFn op,
FlagHelpArg help, FlagValueStorageKind value_kind,
@ -492,7 +510,7 @@ class FlagImpl final : public flags_internal::CommandLineFlag {
// Attempts to parse supplied `value` string. If parsing is successful,
// returns new value. Otherwise returns nullptr.
std::unique_ptr<void, DynValueDeleter> TryParse(absl::string_view value,
std::string* err) const
std::string& err) const
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
// Stores the flag value based on the pointer to the source.
void StoreValue(const void* src) ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
@ -534,7 +552,7 @@ class FlagImpl final : public flags_internal::CommandLineFlag {
ABSL_LOCKS_EXCLUDED(*DataGuard());
bool ParseFrom(absl::string_view value, FlagSettingMode set_mode,
ValueSource source, std::string* error) override
ValueSource source, std::string& error) override
ABSL_LOCKS_EXCLUDED(*DataGuard());
// Immutable flag's state.
@ -641,7 +659,7 @@ class Flag {
impl_.AssertValidType(base_internal::FastTypeId<T>(), &GenRuntimeTypeId<T>);
#endif
if (!value_.Get(&u.value)) impl_.Read(&u.value);
if (!value_.Get(u.value)) impl_.Read(&u.value);
return std::move(u.value);
}
void Set(const T& v) {
@ -649,6 +667,13 @@ class Flag {
impl_.Write(&v);
}
template <typename U>
friend const CommandLineFlag& absl::GetFlagReflectionHandle(
const absl::Flag<U>& f);
// Access to the reflection.
const CommandLineFlag& Reflect() const { return impl_; }
// Flag's data
// The implementation depends on value_ field to be placed exactly after the
// impl_ field, so that impl_ can figure out the offset to the value and
@ -720,12 +745,12 @@ struct FlagRegistrarEmpty {};
template <typename T, bool do_register>
class FlagRegistrar {
public:
explicit FlagRegistrar(Flag<T>* flag) : flag_(flag) {
if (do_register) flags_internal::RegisterCommandLineFlag(&flag_->impl_);
explicit FlagRegistrar(Flag<T>& flag) : flag_(flag) {
if (do_register) flags_internal::RegisterCommandLineFlag(flag_.impl_);
}
FlagRegistrar OnUpdate(FlagCallbackFunc cb) && {
flag_->impl_.SetCallback(cb);
flag_.impl_.SetCallback(cb);
return *this;
}
@ -735,7 +760,7 @@ class FlagRegistrar {
operator FlagRegistrarEmpty() const { return {}; } // NOLINT
private:
Flag<T>* flag_; // Flag being registered (not owned).
Flag<T>& flag_; // Flag being registered (not owned).
};
} // namespace flags_internal

1
third_party/abseil_cpp/absl/flags/internal/parse.h vendored
View file

@ -21,6 +21,7 @@
#include "absl/base/config.h"
#include "absl/flags/declare.h"
#include "absl/strings/string_view.h"
ABSL_DECLARE_FLAG(std::vector<std::string>, flagfile);
ABSL_DECLARE_FLAG(std::vector<std::string>, fromenv);

1
third_party/abseil_cpp/absl/flags/internal/path_util.h vendored
View file

@ -17,7 +17,6 @@
#define ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
#include "absl/base/config.h"
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
namespace absl {

18
third_party/abseil_cpp/absl/flags/internal/private_handle_accessor.cc vendored
View file

@ -15,6 +15,14 @@
#include "absl/flags/internal/private_handle_accessor.h"
#include <memory>
#include <string>
#include "absl/base/config.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/strings/string_view.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
@ -24,8 +32,8 @@ FlagFastTypeId PrivateHandleAccessor::TypeId(const CommandLineFlag& flag) {
}
std::unique_ptr<FlagStateInterface> PrivateHandleAccessor::SaveState(
CommandLineFlag* flag) {
return flag->SaveState();
CommandLineFlag& flag) {
return flag.SaveState();
}
bool PrivateHandleAccessor::IsSpecifiedOnCommandLine(
@ -43,12 +51,12 @@ void PrivateHandleAccessor::CheckDefaultValueParsingRoundtrip(
flag.CheckDefaultValueParsingRoundtrip();
}
bool PrivateHandleAccessor::ParseFrom(CommandLineFlag* flag,
bool PrivateHandleAccessor::ParseFrom(CommandLineFlag& flag,
absl::string_view value,
flags_internal::FlagSettingMode set_mode,
flags_internal::ValueSource source,
std::string* error) {
return flag->ParseFrom(value, set_mode, source, error);
std::string& error) {
return flag.ParseFrom(value, set_mode, source, error);
}
} // namespace flags_internal

12
third_party/abseil_cpp/absl/flags/internal/private_handle_accessor.h vendored
View file

@ -16,7 +16,13 @@
#ifndef ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_
#define ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_
#include <memory>
#include <string>
#include "absl/base/config.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/strings/string_view.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
@ -31,7 +37,7 @@ class PrivateHandleAccessor {
static FlagFastTypeId TypeId(const CommandLineFlag& flag);
// Access to CommandLineFlag::SaveState.
static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag* flag);
static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag& flag);
// Access to CommandLineFlag::IsSpecifiedOnCommandLine.
static bool IsSpecifiedOnCommandLine(const CommandLineFlag& flag);
@ -43,9 +49,9 @@ class PrivateHandleAccessor {
// Access to CommandLineFlag::CheckDefaultValueParsingRoundtrip.
static void CheckDefaultValueParsingRoundtrip(const CommandLineFlag& flag);
static bool ParseFrom(CommandLineFlag* flag, absl::string_view value,
static bool ParseFrom(CommandLineFlag& flag, absl::string_view value,
flags_internal::FlagSettingMode set_mode,
flags_internal::ValueSource source, std::string* error);
flags_internal::ValueSource source, std::string& error);
};
} // namespace flags_internal

4
third_party/abseil_cpp/absl/flags/internal/program_name_test.cc vendored
View file

@ -25,7 +25,7 @@ namespace {
namespace flags = absl::flags_internal;
TEST(FlagsPathUtilTest, TestInitialProgamName) {
TEST(FlagsPathUtilTest, TestProgamNameInterfaces) {
flags::SetProgramInvocationName("absl/flags/program_name_test");
std::string program_name = flags::ProgramInvocationName();
for (char& c : program_name)
@ -43,9 +43,7 @@ TEST(FlagsPathUtilTest, TestInitialProgamName) {
EXPECT_TRUE(absl::EndsWith(program_name, expect_name)) << program_name;
EXPECT_EQ(flags::ShortProgramInvocationName(), expect_basename);
}
TEST(FlagsPathUtilTest, TestProgamNameInterfaces) {
flags::SetProgramInvocationName("a/my_test");
EXPECT_EQ(flags::ProgramInvocationName(), "a/my_test");

350
third_party/abseil_cpp/absl/flags/internal/registry.cc vendored
View file

@ -1,350 +0,0 @@
//
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/flags/internal/registry.h"
#include <assert.h>
#include <stdlib.h>
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/thread_annotations.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/private_handle_accessor.h"
#include "absl/flags/usage_config.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/synchronization/mutex.h"
// --------------------------------------------------------------------
// FlagRegistry implementation
// A FlagRegistry holds all flag objects indexed
// by their names so that if you know a flag's name you can access or
// set it.
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
// --------------------------------------------------------------------
// FlagRegistry
// A FlagRegistry singleton object holds all flag objects indexed
// by their names so that if you know a flag's name (as a C
// string), you can access or set it. If the function is named
// FooLocked(), you must own the registry lock before calling
// the function; otherwise, you should *not* hold the lock, and
// the function will acquire it itself if needed.
// --------------------------------------------------------------------
class FlagRegistry {
public:
FlagRegistry() = default;
~FlagRegistry() = default;
// Store a flag in this registry. Takes ownership of *flag.
void RegisterFlag(CommandLineFlag* flag);
void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION(lock_) { lock_.Lock(); }
void Unlock() ABSL_UNLOCK_FUNCTION(lock_) { lock_.Unlock(); }
// Returns the flag object for the specified name, or nullptr if not found.
// Will emit a warning if a 'retired' flag is specified.
CommandLineFlag* FindFlagLocked(absl::string_view name);
// Returns the retired flag object for the specified name, or nullptr if not
// found or not retired. Does not emit a warning.
CommandLineFlag* FindRetiredFlagLocked(absl::string_view name);
static FlagRegistry* GlobalRegistry(); // returns a singleton registry
private:
friend class FlagSaverImpl; // reads all the flags in order to copy them
friend void ForEachFlagUnlocked(
std::function<void(CommandLineFlag*)> visitor);
// The map from name to flag, for FindFlagLocked().
using FlagMap = std::map<absl::string_view, CommandLineFlag*>;
using FlagIterator = FlagMap::iterator;
using FlagConstIterator = FlagMap::const_iterator;
FlagMap flags_;
absl::Mutex lock_;
// Disallow
FlagRegistry(const FlagRegistry&);
FlagRegistry& operator=(const FlagRegistry&);
};
FlagRegistry* FlagRegistry::GlobalRegistry() {
static FlagRegistry* global_registry = new FlagRegistry;
return global_registry;
}
namespace {
class FlagRegistryLock {
public:
explicit FlagRegistryLock(FlagRegistry* fr) : fr_(fr) { fr_->Lock(); }
~FlagRegistryLock() { fr_->Unlock(); }
private:
FlagRegistry* const fr_;
};
void DestroyRetiredFlag(CommandLineFlag* flag);
} // namespace
void FlagRegistry::RegisterFlag(CommandLineFlag* flag) {
FlagRegistryLock registry_lock(this);
std::pair<FlagIterator, bool> ins =
flags_.insert(FlagMap::value_type(flag->Name(), flag));
if (ins.second == false) { // means the name was already in the map
CommandLineFlag* old_flag = ins.first->second;
if (flag->IsRetired() != old_flag->IsRetired()) {
// All registrations must agree on the 'retired' flag.
flags_internal::ReportUsageError(
absl::StrCat(
"Retired flag '", flag->Name(),
"' was defined normally in file '",
(flag->IsRetired() ? old_flag->Filename() : flag->Filename()),
"'."),
true);
} else if (flags_internal::PrivateHandleAccessor::TypeId(*flag) !=
flags_internal::PrivateHandleAccessor::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(), "'."),
true);
} else if (old_flag->IsRetired()) {
// Retired flag can just be deleted.
DestroyRetiredFlag(flag);
return;
} else if (old_flag->Filename() != flag->Filename()) {
flags_internal::ReportUsageError(
absl::StrCat("Flag '", flag->Name(),
"' was defined more than once (in files '",
old_flag->Filename(), "' and '", flag->Filename(),
"')."),
true);
} else {
flags_internal::ReportUsageError(
absl::StrCat(
"Something wrong with flag '", flag->Name(), "' in file '",
flag->Filename(), "'. One possibility: file '", flag->Filename(),
"' is being linked both statically and dynamically into this "
"executable. e.g. some files listed as srcs to a test and also "
"listed as srcs of some shared lib deps of the same test."),
true);
}
// All cases above are fatal, except for the retired flags.
std::exit(1);
}
}
CommandLineFlag* FlagRegistry::FindFlagLocked(absl::string_view name) {
FlagConstIterator i = flags_.find(name);
if (i == flags_.end()) {
return nullptr;
}
if (i->second->IsRetired()) {
flags_internal::ReportUsageError(
absl::StrCat("Accessing retired flag '", name, "'"), false);
}
return i->second;
}
CommandLineFlag* FlagRegistry::FindRetiredFlagLocked(absl::string_view name) {
FlagConstIterator i = flags_.find(name);
if (i == flags_.end() || !i->second->IsRetired()) {
return nullptr;
}
return i->second;
}
// --------------------------------------------------------------------
// FlagSaver
// FlagSaverImpl
// This class stores the states of all flags at construct time,
// and restores all flags to that state at destruct time.
// Its major implementation challenge is that it never modifies
// pointers in the 'main' registry, so global FLAG_* vars always
// point to the right place.
// --------------------------------------------------------------------
class FlagSaverImpl {
public:
FlagSaverImpl() = default;
FlagSaverImpl(const FlagSaverImpl&) = delete;
void operator=(const FlagSaverImpl&) = delete;
// Saves the flag states from the flag registry into this object.
// It's an error to call this more than once.
void SaveFromRegistry() {
assert(backup_registry_.empty()); // call only once!
flags_internal::ForEachFlag([&](flags_internal::CommandLineFlag* flag) {
if (auto flag_state =
flags_internal::PrivateHandleAccessor::SaveState(flag)) {
backup_registry_.emplace_back(std::move(flag_state));
}
});
}
// Restores the saved flag states into the flag registry.
void RestoreToRegistry() {
for (const auto& flag_state : backup_registry_) {
flag_state->Restore();
}
}
private:
std::vector<std::unique_ptr<flags_internal::FlagStateInterface>>
backup_registry_;
};
FlagSaver::FlagSaver() : impl_(new FlagSaverImpl) { impl_->SaveFromRegistry(); }
void FlagSaver::Ignore() {
delete impl_;
impl_ = nullptr;
}
FlagSaver::~FlagSaver() {
if (!impl_) return;
impl_->RestoreToRegistry();
delete impl_;
}
// --------------------------------------------------------------------
CommandLineFlag* FindCommandLineFlag(absl::string_view name) {
if (name.empty()) return nullptr;
FlagRegistry* const registry = FlagRegistry::GlobalRegistry();
FlagRegistryLock frl(registry);
return registry->FindFlagLocked(name);
}
CommandLineFlag* FindRetiredFlag(absl::string_view name) {
FlagRegistry* const registry = FlagRegistry::GlobalRegistry();
FlagRegistryLock frl(registry);
return registry->FindRetiredFlagLocked(name);
}
// --------------------------------------------------------------------
void ForEachFlagUnlocked(std::function<void(CommandLineFlag*)> visitor) {
FlagRegistry* const registry = FlagRegistry::GlobalRegistry();
for (FlagRegistry::FlagConstIterator i = registry->flags_.begin();
i != registry->flags_.end(); ++i) {
visitor(i->second);
}
}
void ForEachFlag(std::function<void(CommandLineFlag*)> visitor) {
FlagRegistry* const registry = FlagRegistry::GlobalRegistry();
FlagRegistryLock frl(registry);
ForEachFlagUnlocked(visitor);
}
// --------------------------------------------------------------------
bool RegisterCommandLineFlag(CommandLineFlag* flag) {
FlagRegistry::GlobalRegistry()->RegisterFlag(flag);
return true;
}
// --------------------------------------------------------------------
namespace {
class RetiredFlagObj final : public flags_internal::CommandLineFlag {
public:
constexpr RetiredFlagObj(const char* name, FlagFastTypeId type_id)
: name_(name), type_id_(type_id) {}
private:
absl::string_view Name() const override { return name_; }
std::string Filename() const override { return "RETIRED"; }
FlagFastTypeId TypeId() const override { return type_id_; }
std::string Help() const override { return ""; }
bool IsRetired() const override { return true; }
bool IsSpecifiedOnCommandLine() const override { return false; }
std::string DefaultValue() const override { return ""; }
std::string CurrentValue() const override { return ""; }
// Any input is valid
bool ValidateInputValue(absl::string_view) const override { return true; }
std::unique_ptr<flags_internal::FlagStateInterface> SaveState() override {
return nullptr;
}
bool ParseFrom(absl::string_view, flags_internal::FlagSettingMode,
flags_internal::ValueSource, std::string*) override {
return false;
}
void CheckDefaultValueParsingRoundtrip() const override {}
void Read(void*) const override {}
// Data members
const char* const name_;
const FlagFastTypeId type_id_;
};
void DestroyRetiredFlag(flags_internal::CommandLineFlag* flag) {
assert(flag->IsRetired());
delete static_cast<RetiredFlagObj*>(flag);
}
} // namespace
bool Retire(const char* name, FlagFastTypeId type_id) {
auto* flag = new flags_internal::RetiredFlagObj(name, type_id);
FlagRegistry::GlobalRegistry()->RegisterFlag(flag);
return true;
}
// --------------------------------------------------------------------
bool IsRetiredFlag(absl::string_view name, bool* type_is_bool) {
assert(!name.empty());
CommandLineFlag* flag = flags_internal::FindRetiredFlag(name);
if (flag == nullptr) {
return false;
}
assert(type_is_bool);
*type_is_bool = flag->IsOfType<bool>();
return true;
}
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl

43
third_party/abseil_cpp/absl/flags/internal/registry.h vendored
View file

@ -17,11 +17,9 @@
#define ABSL_FLAGS_INTERNAL_REGISTRY_H_
#include <functional>
#include <map>
#include <string>
#include "absl/base/config.h"
#include "absl/base/macros.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/strings/string_view.h"
@ -32,19 +30,16 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
CommandLineFlag* FindCommandLineFlag(absl::string_view name);
CommandLineFlag* FindRetiredFlag(absl::string_view name);
// Executes specified visitor for each non-retired flag in the registry.
// Requires the caller hold the registry lock.
void ForEachFlagUnlocked(std::function<void(CommandLineFlag*)> visitor);
void ForEachFlagUnlocked(std::function<void(CommandLineFlag&)> visitor);
// Executes specified visitor for each non-retired flag in the registry. While
// callback are executed, the registry is locked and can't be changed.
void ForEachFlag(std::function<void(CommandLineFlag*)> visitor);
void ForEachFlag(std::function<void(CommandLineFlag&)> visitor);
//-----------------------------------------------------------------------------
bool RegisterCommandLineFlag(CommandLineFlag*);
bool RegisterCommandLineFlag(CommandLineFlag&);
//-----------------------------------------------------------------------------
// Retired registrations:
@ -87,36 +82,6 @@ inline bool RetiredFlag(const char* flag_name) {
return flags_internal::Retire(flag_name, base_internal::FastTypeId<T>());
}
// If the flag is retired, returns true and indicates in |*type_is_bool|
// whether the type of the retired flag is a bool.
// Only to be called by code that needs to explicitly ignore retired flags.
bool IsRetiredFlag(absl::string_view name, bool* type_is_bool);
//-----------------------------------------------------------------------------
// Saves the states (value, default value, whether the user has set
// the flag, registered validators, etc) of all flags, and restores
// them when the FlagSaver is destroyed.
//
// This class is thread-safe. However, its destructor writes to
// exactly the set of flags that have changed value during its
// lifetime, so concurrent _direct_ access to those flags
// (i.e. FLAGS_foo instead of {Get,Set}CommandLineOption()) is unsafe.
class FlagSaver {
public:
FlagSaver();
~FlagSaver();
FlagSaver(const FlagSaver&) = delete;
void operator=(const FlagSaver&) = delete;
// Prevents saver from restoring the saved state of flags.
void Ignore();
private:
class FlagSaverImpl* impl_; // we use pimpl here to keep API steady
};
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl

86
third_party/abseil_cpp/absl/flags/internal/type_erased.cc vendored
View file

@ -1,86 +0,0 @@
//
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/flags/internal/type_erased.h"
#include <assert.h>
#include <string>
#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/private_handle_accessor.h"
#include "absl/flags/internal/registry.h"
#include "absl/flags/usage_config.h"
#include "absl/strings/string_view.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
bool GetCommandLineOption(absl::string_view name, std::string* value) {
if (name.empty()) return false;
assert(value);
CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
if (flag == nullptr || flag->IsRetired()) {
return false;
}
*value = flag->CurrentValue();
return true;
}
bool SetCommandLineOption(absl::string_view name, absl::string_view value) {
return SetCommandLineOptionWithMode(name, value,
flags_internal::SET_FLAGS_VALUE);
}
bool SetCommandLineOptionWithMode(absl::string_view name,
absl::string_view value,
FlagSettingMode set_mode) {
CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
if (!flag || flag->IsRetired()) return false;
std::string error;
if (!flags_internal::PrivateHandleAccessor::ParseFrom(
flag, value, set_mode, kProgrammaticChange, &error)) {
// Errors here are all of the form: the provided name was a recognized
// flag, but the value was invalid (bad type, or validation failed).
flags_internal::ReportUsageError(error, false);
return false;
}
return true;
}
// --------------------------------------------------------------------
bool IsValidFlagValue(absl::string_view name, absl::string_view value) {
CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
return flag != nullptr &&
(flag->IsRetired() ||
flags_internal::PrivateHandleAccessor::ValidateInputValue(*flag,
value));
}
// --------------------------------------------------------------------
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl

79
third_party/abseil_cpp/absl/flags/internal/type_erased.h vendored
View file

@ -1,79 +0,0 @@
//
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ABSL_FLAGS_INTERNAL_TYPE_ERASED_H_
#define ABSL_FLAGS_INTERNAL_TYPE_ERASED_H_
#include <string>
#include "absl/base/config.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/registry.h"
#include "absl/strings/string_view.h"
// --------------------------------------------------------------------
// Registry interfaces operating on type erased handles.
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
// If a flag named "name" exists, store its current value in *OUTPUT
// and return true. Else return false without changing *OUTPUT.
// Thread-safe.
bool GetCommandLineOption(absl::string_view name, std::string* value);
// Set the value of the flag named "name" to value. If successful,
// returns true. If not successful (e.g., the flag was not found or
// the value is not a valid value), returns false.
// Thread-safe.
bool SetCommandLineOption(absl::string_view name, absl::string_view value);
bool SetCommandLineOptionWithMode(absl::string_view name,
absl::string_view value,
FlagSettingMode set_mode);
//-----------------------------------------------------------------------------
// Returns true iff all of the following conditions are true:
// (a) "name" names a registered flag
// (b) "value" can be parsed succesfully according to the type of the flag
// (c) parsed value passes any validator associated with the flag
bool IsValidFlagValue(absl::string_view name, absl::string_view value);
//-----------------------------------------------------------------------------
// 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
// types passed to DEFINE_FLAG.
template <typename T>
inline bool GetByName(absl::string_view name, T* dst) {
CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name);
if (!flag) return false;
if (auto val = flag->TryGet<T>()) {
*dst = *val;
return true;
}
return false;
}
} // namespace flags_internal
ABSL_NAMESPACE_END
} // namespace absl
#endif // ABSL_FLAGS_INTERNAL_TYPE_ERASED_H_

157
third_party/abseil_cpp/absl/flags/internal/type_erased_test.cc vendored
View file

@ -1,157 +0,0 @@
//
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/flags/internal/type_erased.h"
#include <memory>
#include <string>
#include "gtest/gtest.h"
#include "absl/flags/flag.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/registry.h"
#include "absl/flags/marshalling.h"
#include "absl/memory/memory.h"
ABSL_FLAG(int, int_flag, 1, "int_flag help");
ABSL_FLAG(std::string, string_flag, "dflt", "string_flag help");
ABSL_RETIRED_FLAG(bool, bool_retired_flag, false, "bool_retired_flag help");
namespace {
namespace flags = absl::flags_internal;
class TypeErasedTest : public testing::Test {
protected:
void SetUp() override { flag_saver_ = absl::make_unique<flags::FlagSaver>(); }
void TearDown() override { flag_saver_.reset(); }
private:
std::unique_ptr<flags::FlagSaver> flag_saver_;
};
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestGetCommandLineOption) {
std::string value;
EXPECT_TRUE(flags::GetCommandLineOption("int_flag", &value));
EXPECT_EQ(value, "1");
EXPECT_TRUE(flags::GetCommandLineOption("string_flag", &value));
EXPECT_EQ(value, "dflt");
EXPECT_FALSE(flags::GetCommandLineOption("bool_retired_flag", &value));
EXPECT_FALSE(flags::GetCommandLineOption("unknown_flag", &value));
}
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestSetCommandLineOption) {
EXPECT_TRUE(flags::SetCommandLineOption("int_flag", "101"));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 101);
EXPECT_TRUE(flags::SetCommandLineOption("string_flag", "asdfgh"));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "asdfgh");
EXPECT_FALSE(flags::SetCommandLineOption("bool_retired_flag", "true"));
EXPECT_FALSE(flags::SetCommandLineOption("unknown_flag", "true"));
}
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestSetCommandLineOptionWithMode_SET_FLAGS_VALUE) {
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "101",
flags::SET_FLAGS_VALUE));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 101);
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("string_flag", "asdfgh",
flags::SET_FLAGS_VALUE));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "asdfgh");
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("bool_retired_flag", "true",
flags::SET_FLAGS_VALUE));
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("unknown_flag", "true",
flags::SET_FLAGS_VALUE));
}
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestSetCommandLineOptionWithMode_SET_FLAG_IF_DEFAULT) {
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "101",
flags::SET_FLAG_IF_DEFAULT));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 101);
// This semantic is broken. We return true instead of false. Value is not
// updated.
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "202",
flags::SET_FLAG_IF_DEFAULT));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 101);
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("string_flag", "asdfgh",
flags::SET_FLAG_IF_DEFAULT));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "asdfgh");
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("bool_retired_flag", "true",
flags::SET_FLAG_IF_DEFAULT));
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("unknown_flag", "true",
flags::SET_FLAG_IF_DEFAULT));
}
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestSetCommandLineOptionWithMode_SET_FLAGS_DEFAULT) {
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "101",
flags::SET_FLAGS_DEFAULT));
// Set it again to ensure that resetting logic is covered.
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "102",
flags::SET_FLAGS_DEFAULT));
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "103",
flags::SET_FLAGS_DEFAULT));
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("string_flag", "asdfgh",
flags::SET_FLAGS_DEFAULT));
EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "asdfgh");
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("bool_retired_flag", "true",
flags::SET_FLAGS_DEFAULT));
EXPECT_FALSE(flags::SetCommandLineOptionWithMode("unknown_flag", "true",
flags::SET_FLAGS_DEFAULT));
// This should be successfull, since flag is still is not set
EXPECT_TRUE(flags::SetCommandLineOptionWithMode("int_flag", "202",
flags::SET_FLAG_IF_DEFAULT));
EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 202);
}
// --------------------------------------------------------------------
TEST_F(TypeErasedTest, TestIsValidFlagValue) {
EXPECT_TRUE(flags::IsValidFlagValue("int_flag", "57"));
EXPECT_TRUE(flags::IsValidFlagValue("int_flag", "-101"));
EXPECT_FALSE(flags::IsValidFlagValue("int_flag", "1.1"));
EXPECT_TRUE(flags::IsValidFlagValue("string_flag", "#%^#%^$%DGHDG$W%adsf"));
EXPECT_TRUE(flags::IsValidFlagValue("bool_retired_flag", "true"));
}
} // namespace

33
third_party/abseil_cpp/absl/flags/internal/usage.cc vendored
View file

@ -15,6 +15,8 @@
#include "absl/flags/internal/usage.h"
#include <stdint.h>
#include <functional>
#include <map>
#include <ostream>
@ -23,8 +25,8 @@
#include <vector>
#include "absl/base/config.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/flag.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/flags/internal/flag.h"
#include "absl/flags/internal/path_util.h"
#include "absl/flags/internal/private_handle_accessor.h"
@ -107,8 +109,8 @@ class FlagHelpPrettyPrinter {
public:
// Pretty printer holds on to the std::ostream& reference to direct an output
// to that stream.
FlagHelpPrettyPrinter(int max_line_len, std::ostream* out)
: out_(*out),
FlagHelpPrettyPrinter(int max_line_len, std::ostream& out)
: out_(out),
max_line_len_(max_line_len),
line_len_(0),
first_line_(true) {}
@ -182,8 +184,7 @@ class FlagHelpPrettyPrinter {
bool first_line_;
};
void FlagHelpHumanReadable(const flags_internal::CommandLineFlag& flag,
std::ostream* out) {
void FlagHelpHumanReadable(const CommandLineFlag& flag, std::ostream& out) {
FlagHelpPrettyPrinter printer(80, out); // Max line length is 80.
// Flag name.
@ -245,30 +246,28 @@ void FlagsHelpImpl(std::ostream& out, flags_internal::FlagKindFilter filter_cb,
// This map is used to output matching flags grouped by package and file
// name.
std::map<std::string,
std::map<std::string,
std::vector<const flags_internal::CommandLineFlag*>>>
std::map<std::string, std::vector<const absl::CommandLineFlag*>>>
matching_flags;
flags_internal::ForEachFlag([&](flags_internal::CommandLineFlag* flag) {
std::string flag_filename = flag->Filename();
flags_internal::ForEachFlag([&](absl::CommandLineFlag& flag) {
std::string flag_filename = flag.Filename();
// Ignore retired flags.
if (flag->IsRetired()) return;
if (flag.IsRetired()) return;
// If the flag has been stripped, pretend that it doesn't exist.
if (flag->Help() == flags_internal::kStrippedFlagHelp) return;
if (flag.Help() == flags_internal::kStrippedFlagHelp) return;
// Make sure flag satisfies the filter
if (!filter_cb || !filter_cb(flag_filename)) return;
matching_flags[std::string(flags_internal::Package(flag_filename))]
[flag_filename]
.push_back(flag);
.push_back(&flag);
});
absl::string_view
package_separator; // controls blank lines between packages.
absl::string_view file_separator; // controls blank lines between files.
absl::string_view package_separator; // controls blank lines between packages
absl::string_view file_separator; // controls blank lines between files
for (const auto& package : matching_flags) {
if (format == HelpFormat::kHumanReadable) {
out << package_separator;
@ -303,10 +302,10 @@ void FlagsHelpImpl(std::ostream& out, flags_internal::FlagKindFilter filter_cb,
// --------------------------------------------------------------------
// Produces the help message describing specific flag.
void FlagHelp(std::ostream& out, const flags_internal::CommandLineFlag& flag,
void FlagHelp(std::ostream& out, const CommandLineFlag& flag,
HelpFormat format) {
if (format == HelpFormat::kHumanReadable)
flags_internal::FlagHelpHumanReadable(flag, &out);
flags_internal::FlagHelpHumanReadable(flag, out);
}
// --------------------------------------------------------------------

4
third_party/abseil_cpp/absl/flags/internal/usage.h vendored
View file

@ -20,8 +20,8 @@
#include <string>
#include "absl/base/config.h"
#include "absl/flags/commandlineflag.h"
#include "absl/flags/declare.h"
#include "absl/flags/internal/commandlineflag.h"
#include "absl/strings/string_view.h"
// --------------------------------------------------------------------
@ -37,7 +37,7 @@ enum class HelpFormat {
};
// Outputs the help message describing specific flag.
void FlagHelp(std::ostream& out, const flags_internal::CommandLineFlag& flag,
void FlagHelp(std::ostream& out, const CommandLineFlag& flag,
HelpFormat format = HelpFormat::kHumanReadable);
// Produces the help messages for all flags matching the filter. A flag matches

16
third_party/abseil_cpp/absl/flags/internal/usage_test.cc vendored
View file

@ -21,15 +21,13 @@
#include <string>
#include "gtest/gtest.h"
#include "absl/flags/declare.h"
#include "absl/flags/flag.h"
#include "absl/flags/internal/parse.h"
#include "absl/flags/internal/path_util.h"
#include "absl/flags/internal/program_name.h"
#include "absl/flags/internal/registry.h"
#include "absl/flags/reflection.h"
#include "absl/flags/usage.h"
#include "absl/flags/usage_config.h"
#include "absl/memory/memory.h"
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
@ -91,7 +89,7 @@ class UsageReportingTest : public testing::Test {
}
private:
flags::FlagSaver flag_saver_;
absl::FlagSaver flag_saver_;
};
// --------------------------------------------------------------------
@ -112,7 +110,7 @@ TEST_F(UsageReportingDeathTest, TestSetProgramUsageMessage) {
// --------------------------------------------------------------------
TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_01) {
const auto* flag = flags::FindCommandLineFlag("usage_reporting_test_flag_01");
const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_01");
std::stringstream test_buf;
flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
@ -124,7 +122,7 @@ TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_01) {
}
TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_02) {
const auto* flag = flags::FindCommandLineFlag("usage_reporting_test_flag_02");
const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_02");
std::stringstream test_buf;
flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
@ -136,7 +134,7 @@ TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_02) {
}
TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_03) {
const auto* flag = flags::FindCommandLineFlag("usage_reporting_test_flag_03");
const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_03");
std::stringstream test_buf;
flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
@ -148,7 +146,7 @@ TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_03) {
}
TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_04) {
const auto* flag = flags::FindCommandLineFlag("usage_reporting_test_flag_04");
const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_04");
std::stringstream test_buf;
flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
@ -160,7 +158,7 @@ TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_04) {
}
TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_05) {
const auto* flag = flags::FindCommandLineFlag("usage_reporting_test_flag_05");
const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_05");
std::stringstream test_buf;
flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);