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Export of internal Abseil changes

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2dd5008c7b4176859e320c7c337078adb173b662 by Tom Manshreck <shreck@google.com>:

Internal change

PiperOrigin-RevId: 304022549

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6442abd78697b03cfe698b0d0dac7f1eb4b5cb38 by Andy Getzendanner <durandal@google.com>:

Internal change

PiperOrigin-RevId: 303890410

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eb8b37b468b0f23da09d3de714272928ef61f942 by Gennadiy Rozental <rogeeff@google.com>:

Roll changes forward with ChunkIterator templatized.

This should facilitate usage of "small" chunk iterator for a regular usage and proper "big" iterator internally in Cord implementation. This way Cord users are not exposed to stack size overhead if they have a lot of chunk iterators or recursive implementation which relies on chunk iterators.

PiperOrigin-RevId: 303877118

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9623c569e7c55b45254e95f2d14c5badf9c901aa by Gennadiy Rozental <rogeeff@google.com>:

Switch Flags implementation of fast type id to use absl/base/internal/fast_type_id.h

PiperOrigin-RevId: 303861019

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e2931e8d53c86d0816da6bbc8ba58cf5a3a443bb by Matthew Brown <matthewbr@google.com>:

Internal Change

PiperOrigin-RevId: 303832407

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b549ed6e441e920b8ad6f02a80b9fd543820ef86 by Tom Manshreck <shreck@google.com>:

Update Cord header file comments to Abseil standards

PiperOrigin-RevId: 303823232

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fc633d4f31a2d058f2b6a7029fc7c9820cd71c92 by Evan Brown <ezb@google.com>:

Remove top-level const from K/V in map_slot_type::mutable_value and map_slot_type::key.

This allows us to move between `map_slot_type::mutable_value`s internally even when the key_type and/or mapped_type specified by the user are const.

PiperOrigin-RevId: 303811694

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909b3ce7cb3583ee9c374d36ff5f82bba02a1b64 by Derek Mauro <dmauro@google.com>:

Add hardening assertions to the preconditions of absl::Cord

PiperOrigin-RevId: 303419537

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9d32f79eabd54e6cb17bcc28b53e9bcfeb3cf6f4 by Greg Falcon <gfalcon@google.com>:

Don't use MSVC-specific bit manipulations when using Clang on Windows.

This fixes a compiler warning.  Note that we do not have continuous testing for this configuration; this CL is best-effort support.

PiperOrigin-RevId: 303322582

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f6e0a35a2b9081d2a9eef73789b7bc1b5e46e5ad by Gennadiy Rozental <rogeeff@google.com>:

Introduce standlone FastTypeId utility to represent compile time unique type id.

PiperOrigin-RevId: 303180545

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99120e9fbdb5b2d327139ab8f617533d7bc3345b by Abseil Team <absl-team@google.com>:

Changed absl's import of std::string_view to
using string_view = std::string_view.
This should help tools (e.g. include-what-you-use) discover where absl::string_view is defined.

PiperOrigin-RevId: 303169095
GitOrigin-RevId: 2dd5008c7b4176859e320c7c337078adb173b662
Change-Id: I1e18ae08e23686ac963e7ea5e5bd499e18d51048
This commit is contained in:
Abseil Team 2020-03-31 12:32:35 -07:00 • committed by Andy Getz
parent 79e0dc1151
commit fba8a316c3
24 changed files with 1068 additions and 486 deletions
Download patch file Download diff file Expand all files Collapse all files

22
absl/flags/internal/commandlineflag.h
View file

@ -24,6 +24,7 @@
#include <typeinfo>
#include "absl/base/config.h"
#include "absl/base/internal/fast_type_id.h"
#include "absl/base/macros.h"
#include "absl/flags/config.h"
#include "absl/flags/marshalling.h"
@ -34,23 +35,12 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace flags_internal {
// An alias for flag static type id. Values of type identify the flag value type
// simialarly to typeid(T), but without relying on RTTI being available. In most
// An alias for flag fast type id. This value identifies the flag value type
// simialarly to typeid(T), without relying on RTTI being available. In most
// 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 FlagStaticTypeId = void* (*)();
// Address of this function template is used in current implementation as a flag
// static type id.
template <typename T>
void* FlagStaticTypeIdGen() {
#if defined(ABSL_FLAGS_INTERNAL_HAS_RTTI)
return const_cast<std::type_info*>(&typeid(T));
#else
return nullptr;
#endif
}
using FlagFastTypeId = base_internal::FastTypeIdType;
// Options that control SetCommandLineOptionWithMode.
enum FlagSettingMode {
@ -97,7 +87,7 @@ class CommandLineFlag {
// Return true iff flag has type T.
template <typename T>
inline bool IsOfType() const {
return TypeId() == &flags_internal::FlagStaticTypeIdGen<T>;
return TypeId() == base_internal::FastTypeId<T>();
}
// Attempts to retrieve the flag value. Returns value on success,
@ -150,7 +140,7 @@ class CommandLineFlag {
// Returns true iff this is a handle to an Abseil Flag.
virtual bool IsAbseilFlag() const;
// Returns id of the flag's value type.
virtual FlagStaticTypeId TypeId() const = 0;
virtual FlagFastTypeId TypeId() const = 0;
virtual bool IsModified() const = 0;
virtual bool IsSpecifiedOnCommandLine() const = 0;
virtual std::string DefaultValue() const = 0;