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Diffstat (limited to 'third_party/abseil_cpp/absl/base/macros.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/base/macros.h | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/third_party/abseil_cpp/absl/base/macros.h b/third_party/abseil_cpp/absl/base/macros.h deleted file mode 100644 index ea1da65ba2..0000000000 --- a/third_party/abseil_cpp/absl/base/macros.h +++ /dev/null @@ -1,226 +0,0 @@ -// -// Copyright 2017 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. -// -// ----------------------------------------------------------------------------- -// File: macros.h -// ----------------------------------------------------------------------------- -// -// This header file defines the set of language macros used within Abseil code. -// For the set of macros used to determine supported compilers and platforms, -// see absl/base/config.h instead. -// -// This code is compiled directly on many platforms, including client -// platforms like Windows, Mac, and embedded systems. Before making -// any changes here, make sure that you're not breaking any platforms. - -#ifndef ABSL_BASE_MACROS_H_ -#define ABSL_BASE_MACROS_H_ - -#include <cassert> -#include <cstddef> - -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/optimization.h" -#include "absl/base/port.h" - -// ABSL_ARRAYSIZE() -// -// Returns the number of elements in an array as a compile-time constant, which -// can be used in defining new arrays. If you use this macro on a pointer by -// mistake, you will get a compile-time error. -#define ABSL_ARRAYSIZE(array) \ - (sizeof(::absl::macros_internal::ArraySizeHelper(array))) - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace macros_internal { -// Note: this internal template function declaration is used by ABSL_ARRAYSIZE. -// The function doesn't need a definition, as we only use its type. -template <typename T, size_t N> -auto ArraySizeHelper(const T (&array)[N]) -> char (&)[N]; -} // namespace macros_internal -ABSL_NAMESPACE_END -} // namespace absl - -// ABSL_FALLTHROUGH_INTENDED -// -// Annotates implicit fall-through between switch labels, allowing a case to -// indicate intentional fallthrough and turn off warnings about any lack of a -// `break` statement. The ABSL_FALLTHROUGH_INTENDED macro should be followed by -// a semicolon and can be used in most places where `break` can, provided that -// no statements exist between it and the next switch label. -// -// Example: -// -// switch (x) { -// case 40: -// case 41: -// if (truth_is_out_there) { -// ++x; -// ABSL_FALLTHROUGH_INTENDED; // Use instead of/along with annotations -// // in comments -// } else { -// return x; -// } -// case 42: -// ... -// -// Notes: when compiled with clang in C++11 mode, the ABSL_FALLTHROUGH_INTENDED -// macro is expanded to the [[clang::fallthrough]] attribute, which is analysed -// when performing switch labels fall-through diagnostic -// (`-Wimplicit-fallthrough`). See clang documentation on language extensions -// for details: -// https://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough -// -// When used with unsupported compilers, the ABSL_FALLTHROUGH_INTENDED macro -// has no effect on diagnostics. In any case this macro has no effect on runtime -// behavior and performance of code. -#ifdef ABSL_FALLTHROUGH_INTENDED -#error "ABSL_FALLTHROUGH_INTENDED should not be defined." -#endif - -// TODO(zhangxy): Use c++17 standard [[fallthrough]] macro, when supported. -#if defined(__clang__) && defined(__has_warning) -#if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough") -#define ABSL_FALLTHROUGH_INTENDED [[clang::fallthrough]] -#endif -#elif defined(__GNUC__) && __GNUC__ >= 7 -#define ABSL_FALLTHROUGH_INTENDED [[gnu::fallthrough]] -#endif - -#ifndef ABSL_FALLTHROUGH_INTENDED -#define ABSL_FALLTHROUGH_INTENDED \ - do { \ - } while (0) -#endif - -// ABSL_DEPRECATED() -// -// Marks a deprecated class, struct, enum, function, method and variable -// declarations. The macro argument is used as a custom diagnostic message (e.g. -// suggestion of a better alternative). -// -// Examples: -// -// class ABSL_DEPRECATED("Use Bar instead") Foo {...}; -// -// ABSL_DEPRECATED("Use Baz() instead") void Bar() {...} -// -// template <typename T> -// ABSL_DEPRECATED("Use DoThat() instead") -// void DoThis(); -// -// Every usage of a deprecated entity will trigger a warning when compiled with -// clang's `-Wdeprecated-declarations` option. This option is turned off by -// default, but the warnings will be reported by clang-tidy. -#if defined(__clang__) && __cplusplus >= 201103L -#define ABSL_DEPRECATED(message) __attribute__((deprecated(message))) -#endif - -#ifndef ABSL_DEPRECATED -#define ABSL_DEPRECATED(message) -#endif - -// ABSL_BAD_CALL_IF() -// -// Used on a function overload to trap bad calls: any call that matches the -// overload will cause a compile-time error. This macro uses a clang-specific -// "enable_if" attribute, as described at -// https://clang.llvm.org/docs/AttributeReference.html#enable-if -// -// Overloads which use this macro should be bracketed by -// `#ifdef ABSL_BAD_CALL_IF`. -// -// Example: -// -// int isdigit(int c); -// #ifdef ABSL_BAD_CALL_IF -// int isdigit(int c) -// ABSL_BAD_CALL_IF(c <= -1 || c > 255, -// "'c' must have the value of an unsigned char or EOF"); -// #endif // ABSL_BAD_CALL_IF -#if ABSL_HAVE_ATTRIBUTE(enable_if) -#define ABSL_BAD_CALL_IF(expr, msg) \ - __attribute__((enable_if(expr, "Bad call trap"), unavailable(msg))) -#endif - -// ABSL_ASSERT() -// -// In C++11, `assert` can't be used portably within constexpr functions. -// ABSL_ASSERT functions as a runtime assert but works in C++11 constexpr -// functions. Example: -// -// constexpr double Divide(double a, double b) { -// return ABSL_ASSERT(b != 0), a / b; -// } -// -// This macro is inspired by -// https://akrzemi1.wordpress.com/2017/05/18/asserts-in-constexpr-functions/ -#if defined(NDEBUG) -#define ABSL_ASSERT(expr) \ - (false ? static_cast<void>(expr) : static_cast<void>(0)) -#else -#define ABSL_ASSERT(expr) \ - (ABSL_PREDICT_TRUE((expr)) ? static_cast<void>(0) \ - : [] { assert(false && #expr); }()) // NOLINT -#endif - -// `ABSL_INTERNAL_HARDENING_ABORT()` controls how `ABSL_HARDENING_ASSERT()` -// aborts the program in release mode (when NDEBUG is defined). The -// implementation should abort the program as quickly as possible and ideally it -// should not be possible to ignore the abort request. -#if (ABSL_HAVE_BUILTIN(__builtin_trap) && \ - ABSL_HAVE_BUILTIN(__builtin_unreachable)) || \ - (defined(__GNUC__) && !defined(__clang__)) -#define ABSL_INTERNAL_HARDENING_ABORT() \ - do { \ - __builtin_trap(); \ - __builtin_unreachable(); \ - } while (false) -#else -#define ABSL_INTERNAL_HARDENING_ABORT() abort() -#endif - -// ABSL_HARDENING_ASSERT() -// -// `ABSL_HARDENING_ASSERT()` is like `ABSL_ASSERT()`, but used to implement -// runtime assertions that should be enabled in hardened builds even when -// `NDEBUG` is defined. -// -// When `NDEBUG` is not defined, `ABSL_HARDENING_ASSERT()` is identical to -// `ABSL_ASSERT()`. -// -// See `ABSL_OPTION_HARDENED` in `absl/base/options.h` for more information on -// hardened mode. -#if ABSL_OPTION_HARDENED == 1 && defined(NDEBUG) -#define ABSL_HARDENING_ASSERT(expr) \ - (ABSL_PREDICT_TRUE((expr)) ? static_cast<void>(0) \ - : [] { ABSL_INTERNAL_HARDENING_ABORT(); }()) -#else -#define ABSL_HARDENING_ASSERT(expr) ABSL_ASSERT(expr) -#endif - -#ifdef ABSL_HAVE_EXCEPTIONS -#define ABSL_INTERNAL_TRY try -#define ABSL_INTERNAL_CATCH_ANY catch (...) -#define ABSL_INTERNAL_RETHROW do { throw; } while (false) -#else // ABSL_HAVE_EXCEPTIONS -#define ABSL_INTERNAL_TRY if (true) -#define ABSL_INTERNAL_CATCH_ANY else if (false) -#define ABSL_INTERNAL_RETHROW do {} while (false) -#endif // ABSL_HAVE_EXCEPTIONS - -#endif // ABSL_BASE_MACROS_H_ |