diff options
author | Abseil Team <absl-team@google.com> | 2019-05-07 12:56:42 -0700 |
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committer | Eric Fiselier <eric@efcs.ca> | 2019-05-07 16:32:35 -0400 |
commit | aa468ad75539619b47979911297efbb629c52e44 (patch) | |
tree | 660bdd268ea4bb18d565b253cce6b6a6bbca0590 /absl/flags/internal/type_erased.cc | |
parent | cd86d0d20ab167c33b23d3875db68d1d4bad3a3b (diff) |
Export of internal Abseil changes.
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78293ba4eb4981991ae7e6edd25eb9245fcd7515 by Andy Soffer <asoffer@google.com>:
internal changes
PiperOrigin-RevId: 247073879
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7bd97e3aad0c3012b89a39392a6ad3f254e9f3c3 by Derek Mauro <dmauro@google.com>:
Release commandline flags
PiperOrigin-RevId: 247065920
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2a991849fd7b140a43b073076d194b61533fd199 by Tom Manshreck <shreck@google.com>:
Add documentation for built-in usage flags
PiperOrigin-RevId: 247058863
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14157b0de45841706bbd631284191fd94c313db9 by Derek Mauro <dmauro@google.com>:
Internal change
PiperOrigin-RevId: 247058292
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ed67e0a80468596e30540b367727a250fa415b68 by Abseil Team <absl-team@google.com>:
Internal Change.
PiperOrigin-RevId: 246828655
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e1bc8c2aa3f90b3d56c55c5b7244e718c919265d by Abseil Team <absl-team@google.com>:
Internal change
PiperOrigin-RevId: 246822325
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907a68f287199f749cb9bdb48571b50bc34731e1 by Eric Fiselier <ericwf@google.com>:
Accept vector<bool>::reference in StrCat and friends.
Converting vector<bool>::reference to alphanum requires
two user defined conversions, which isn't allowed.
In order to accept this, we need a special constructor that
is only enabled for the bool proxy types.
PiperOrigin-RevId: 246626732
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fe4295fa95cc65dee8c881ba12dd8f516e68c40d by Abseil Team <absl-team@google.com>:
Clarify the proper way to define AbslHashValue, and fix confusing indentation.
PiperOrigin-RevId: 246406528
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d7174681a72d4a25c8fd2b4d9f515a0763eff87c by Gennadiy Rozental <rogeeff@google.com>:
Internal change
PiperOrigin-RevId: 246358214
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a7fdc19683cf1a5885e9e1af52fcdb2db1eda53b by Abseil Team <absl-team@google.com>:
Fix sample template instantiation.
PiperOrigin-RevId: 246354617
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29a23c6835f872948d09b24d890385bf195bc995 by Abseil Team <absl-team@google.com>:
Fix incorrectly copy-pasted static_assert in absl::optional::value_or
The static_assert for a move-constructible type previously said the type must be copy-constructible.
PiperOrigin-RevId: 246313827
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41884d5872d4ea2c67875b00144b8c8a5859a295 by Greg Falcon <gfalcon@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 245418790
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7f90a7f94cdd5e21232c749efe952a750b5c43a2 by Abseil Team <absl-team@google.com>:
Internal change
PiperOrigin-RevId: 245412658
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730a329cf047d54b46971fce1781edd857208c2a by Greg Falcon <gfalcon@google.com>:
internal change
PiperOrigin-RevId: 245293234
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cf0216be6338200cbb18167d3f3b2e98e372be77 by Greg Falcon <gfalcon@google.com>:
Internal change
PiperOrigin-RevId: 245288164
GitOrigin-RevId: 78293ba4eb4981991ae7e6edd25eb9245fcd7515
Change-Id: I5ea9a852c36c722bae2d6be65fb7f72473d94ab6
Diffstat (limited to 'absl/flags/internal/type_erased.cc')
-rw-r--r-- | absl/flags/internal/type_erased.cc | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/absl/flags/internal/type_erased.cc b/absl/flags/internal/type_erased.cc new file mode 100644 index 0000000..cc10398 --- /dev/null +++ b/absl/flags/internal/type_erased.cc @@ -0,0 +1,121 @@ +// +// 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 "absl/base/internal/raw_logging.h" +#include "absl/flags/config.h" +#include "absl/flags/usage_config.h" +#include "absl/strings/str_cat.h" + +namespace absl { +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; + } + + absl::MutexLock l(InitFlagIfNecessary(flag)); + *value = flag->CurrentValue(); + return true; +} + +bool GetCommandLineFlagInfo(absl::string_view name, + CommandLineFlagInfo* OUTPUT) { + if (name.empty()) return false; + + CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); + if (flag == nullptr || flag->IsRetired()) { + return false; + } + + assert(OUTPUT); + FillCommandLineFlagInfo(flag, OUTPUT); + return true; +} + +CommandLineFlagInfo GetCommandLineFlagInfoOrDie(absl::string_view name) { + CommandLineFlagInfo info; + if (!GetCommandLineFlagInfo(name, &info)) { + ABSL_INTERNAL_LOG(FATAL, absl::StrCat("Flag '", name, "' does not exist")); + } + return info; +} + +// -------------------------------------------------------------------- + +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 (!flag->SetFromString(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); + if (flag == nullptr) { + return false; + } + + if (flag->IsRetired()) { + return true; + } + + // No need to lock the flag since we are not mutating it. + void* obj = Clone(flag->op, flag->def); + std::string ignored_error; + const bool result = + flags_internal::Parse(flag->marshalling_op, value, obj, &ignored_error) && + Validate(flag, obj); + Delete(flag->op, obj); + return result; +} + +// -------------------------------------------------------------------- + +bool SpecifiedOnCommandLine(absl::string_view name) { + CommandLineFlag* flag = flags_internal::FindCommandLineFlag(name); + if (flag != nullptr && !flag->IsRetired()) { + absl::MutexLock l(InitFlagIfNecessary(flag)); + return flag->IsSpecifiedOnCommandLine(); + } + return false; +} + +} // namespace flags_internal +} // namespace absl |