diff options
Diffstat (limited to 'absl/flags/flag.h')
| -rw-r--r-- | absl/flags/flag.h | 61 |
1 files changed, 32 insertions, 29 deletions
diff --git a/absl/flags/flag.h b/absl/flags/flag.h index 194a9d314fc5..8dd1b9be7af8 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 |