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authoranastasy888 <anastasy888@yandex-team.ru>2022-02-10 16:45:54 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:45:54 +0300
commit49f765d71da452ea93138a25559dfa68dd76c7f3 (patch)
tree1016041feb637349e401dcc0fa85217dd2c2c639 /contrib/restricted/abseil-cpp/absl/functional
parent7353a3fdea9c67c256980c00a2b3b67f09b23a27 (diff)
downloadydb-49f765d71da452ea93138a25559dfa68dd76c7f3.tar.gz
Restoring authorship annotation for <anastasy888@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/restricted/abseil-cpp/absl/functional')
-rw-r--r--contrib/restricted/abseil-cpp/absl/functional/function_ref.h270
-rw-r--r--contrib/restricted/abseil-cpp/absl/functional/internal/function_ref.h204
2 files changed, 237 insertions, 237 deletions
diff --git a/contrib/restricted/abseil-cpp/absl/functional/function_ref.h b/contrib/restricted/abseil-cpp/absl/functional/function_ref.h
index 824e3cea9d..75f8c39e25 100644
--- a/contrib/restricted/abseil-cpp/absl/functional/function_ref.h
+++ b/contrib/restricted/abseil-cpp/absl/functional/function_ref.h
@@ -1,142 +1,142 @@
-// 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.
-//
-// -----------------------------------------------------------------------------
-// File: function_ref.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::FunctionRef` type for holding a
-// non-owning reference to an object of any invocable type. This function
-// reference is typically most useful as a type-erased argument type for
-// accepting function types that neither take ownership nor copy the type; using
-// the reference type in this case avoids a copy and an allocation. Best
-// practices of other non-owning reference-like objects (such as
-// `absl::string_view`) apply here.
-//
-// An `absl::FunctionRef` is similar in usage to a `std::function` but has the
-// following differences:
-//
-// * It doesn't own the underlying object.
-// * It doesn't have a null or empty state.
-// * It never performs deep copies or allocations.
-// * It's much faster and cheaper to construct.
-// * It's trivially copyable and destructable.
-//
-// Generally, `absl::FunctionRef` should not be used as a return value, data
-// member, or to initialize a `std::function`. Such usages will often lead to
-// problematic lifetime issues. Once you convert something to an
-// `absl::FunctionRef` you cannot make a deep copy later.
-//
-// This class is suitable for use wherever a "const std::function<>&"
-// would be used without making a copy. ForEach functions and other versions of
-// the visitor pattern are a good example of when this class should be used.
-//
-// This class is trivial to copy and should be passed by value.
-#ifndef ABSL_FUNCTIONAL_FUNCTION_REF_H_
-#define ABSL_FUNCTIONAL_FUNCTION_REF_H_
-
-#include <cassert>
-#include <functional>
-#include <type_traits>
-
+// 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.
+//
+// -----------------------------------------------------------------------------
+// File: function_ref.h
+// -----------------------------------------------------------------------------
+//
+// This header file defines the `absl::FunctionRef` type for holding a
+// non-owning reference to an object of any invocable type. This function
+// reference is typically most useful as a type-erased argument type for
+// accepting function types that neither take ownership nor copy the type; using
+// the reference type in this case avoids a copy and an allocation. Best
+// practices of other non-owning reference-like objects (such as
+// `absl::string_view`) apply here.
+//
+// An `absl::FunctionRef` is similar in usage to a `std::function` but has the
+// following differences:
+//
+// * It doesn't own the underlying object.
+// * It doesn't have a null or empty state.
+// * It never performs deep copies or allocations.
+// * It's much faster and cheaper to construct.
+// * It's trivially copyable and destructable.
+//
+// Generally, `absl::FunctionRef` should not be used as a return value, data
+// member, or to initialize a `std::function`. Such usages will often lead to
+// problematic lifetime issues. Once you convert something to an
+// `absl::FunctionRef` you cannot make a deep copy later.
+//
+// This class is suitable for use wherever a "const std::function<>&"
+// would be used without making a copy. ForEach functions and other versions of
+// the visitor pattern are a good example of when this class should be used.
+//
+// This class is trivial to copy and should be passed by value.
+#ifndef ABSL_FUNCTIONAL_FUNCTION_REF_H_
+#define ABSL_FUNCTIONAL_FUNCTION_REF_H_
+
+#include <cassert>
+#include <functional>
+#include <type_traits>
+
#include "absl/base/attributes.h"
-#include "absl/functional/internal/function_ref.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
+#include "absl/functional/internal/function_ref.h"
+#include "absl/meta/type_traits.h"
+
+namespace absl {
ABSL_NAMESPACE_BEGIN
-
-// FunctionRef
-//
-// Dummy class declaration to allow the partial specialization based on function
-// types below.
-template <typename T>
-class FunctionRef;
-
-// FunctionRef
-//
-// An `absl::FunctionRef` is a lightweight wrapper to any invokable object with
-// a compatible signature. Generally, an `absl::FunctionRef` should only be used
-// as an argument type and should be preferred as an argument over a const
-// reference to a `std::function`.
-//
-// Example:
-//
-// // The following function takes a function callback by const reference
-// bool Visitor(const std::function<void(my_proto&,
-// absl::string_view)>& callback);
-//
-// // Assuming that the function is not stored or otherwise copied, it can be
-// // replaced by an `absl::FunctionRef`:
-// bool Visitor(absl::FunctionRef<void(my_proto&, absl::string_view)>
-// callback);
-//
-// Note: the assignment operator within an `absl::FunctionRef` is intentionally
-// deleted to prevent misuse; because the `absl::FunctionRef` does not own the
-// underlying type, assignment likely indicates misuse.
-template <typename R, typename... Args>
-class FunctionRef<R(Args...)> {
- private:
- // Used to disable constructors for objects that are not compatible with the
- // signature of this FunctionRef.
- template <typename F,
+
+// FunctionRef
+//
+// Dummy class declaration to allow the partial specialization based on function
+// types below.
+template <typename T>
+class FunctionRef;
+
+// FunctionRef
+//
+// An `absl::FunctionRef` is a lightweight wrapper to any invokable object with
+// a compatible signature. Generally, an `absl::FunctionRef` should only be used
+// as an argument type and should be preferred as an argument over a const
+// reference to a `std::function`.
+//
+// Example:
+//
+// // The following function takes a function callback by const reference
+// bool Visitor(const std::function<void(my_proto&,
+// absl::string_view)>& callback);
+//
+// // Assuming that the function is not stored or otherwise copied, it can be
+// // replaced by an `absl::FunctionRef`:
+// bool Visitor(absl::FunctionRef<void(my_proto&, absl::string_view)>
+// callback);
+//
+// Note: the assignment operator within an `absl::FunctionRef` is intentionally
+// deleted to prevent misuse; because the `absl::FunctionRef` does not own the
+// underlying type, assignment likely indicates misuse.
+template <typename R, typename... Args>
+class FunctionRef<R(Args...)> {
+ private:
+ // Used to disable constructors for objects that are not compatible with the
+ // signature of this FunctionRef.
+ template <typename F,
typename FR = absl::base_internal::invoke_result_t<F, Args&&...>>
- using EnableIfCompatible =
- typename std::enable_if<std::is_void<R>::value ||
- std::is_convertible<FR, R>::value>::type;
-
- public:
- // Constructs a FunctionRef from any invokable type.
- template <typename F, typename = EnableIfCompatible<const F&>>
+ using EnableIfCompatible =
+ typename std::enable_if<std::is_void<R>::value ||
+ std::is_convertible<FR, R>::value>::type;
+
+ public:
+ // Constructs a FunctionRef from any invokable type.
+ template <typename F, typename = EnableIfCompatible<const F&>>
// NOLINTNEXTLINE(runtime/explicit)
FunctionRef(const F& f ABSL_ATTRIBUTE_LIFETIME_BOUND)
- : invoker_(&absl::functional_internal::InvokeObject<F, R, Args...>) {
- absl::functional_internal::AssertNonNull(f);
- ptr_.obj = &f;
- }
-
- // Overload for function pointers. This eliminates a level of indirection that
- // would happen if the above overload was used (it lets us store the pointer
- // instead of a pointer to a pointer).
- //
- // This overload is also used for references to functions, since references to
- // functions can decay to function pointers implicitly.
- template <
- typename F, typename = EnableIfCompatible<F*>,
- absl::functional_internal::EnableIf<absl::is_function<F>::value> = 0>
- FunctionRef(F* f) // NOLINT(runtime/explicit)
- : invoker_(&absl::functional_internal::InvokeFunction<F*, R, Args...>) {
- assert(f != nullptr);
- ptr_.fun = reinterpret_cast<decltype(ptr_.fun)>(f);
- }
-
- // To help prevent subtle lifetime bugs, FunctionRef is not assignable.
- // Typically, it should only be used as an argument type.
- FunctionRef& operator=(const FunctionRef& rhs) = delete;
+ : invoker_(&absl::functional_internal::InvokeObject<F, R, Args...>) {
+ absl::functional_internal::AssertNonNull(f);
+ ptr_.obj = &f;
+ }
+
+ // Overload for function pointers. This eliminates a level of indirection that
+ // would happen if the above overload was used (it lets us store the pointer
+ // instead of a pointer to a pointer).
+ //
+ // This overload is also used for references to functions, since references to
+ // functions can decay to function pointers implicitly.
+ template <
+ typename F, typename = EnableIfCompatible<F*>,
+ absl::functional_internal::EnableIf<absl::is_function<F>::value> = 0>
+ FunctionRef(F* f) // NOLINT(runtime/explicit)
+ : invoker_(&absl::functional_internal::InvokeFunction<F*, R, Args...>) {
+ assert(f != nullptr);
+ ptr_.fun = reinterpret_cast<decltype(ptr_.fun)>(f);
+ }
+
+ // To help prevent subtle lifetime bugs, FunctionRef is not assignable.
+ // Typically, it should only be used as an argument type.
+ FunctionRef& operator=(const FunctionRef& rhs) = delete;
FunctionRef(const FunctionRef& rhs) = default;
-
- // Call the underlying object.
- R operator()(Args... args) const {
- return invoker_(ptr_, std::forward<Args>(args)...);
- }
-
- private:
- absl::functional_internal::VoidPtr ptr_;
- absl::functional_internal::Invoker<R, Args...> invoker_;
-};
-
+
+ // Call the underlying object.
+ R operator()(Args... args) const {
+ return invoker_(ptr_, std::forward<Args>(args)...);
+ }
+
+ private:
+ absl::functional_internal::VoidPtr ptr_;
+ absl::functional_internal::Invoker<R, Args...> invoker_;
+};
+
ABSL_NAMESPACE_END
-} // namespace absl
-
-#endif // ABSL_FUNCTIONAL_FUNCTION_REF_H_
+} // namespace absl
+
+#endif // ABSL_FUNCTIONAL_FUNCTION_REF_H_
diff --git a/contrib/restricted/abseil-cpp/absl/functional/internal/function_ref.h b/contrib/restricted/abseil-cpp/absl/functional/internal/function_ref.h
index b5bb8b430a..4c7c9e636a 100644
--- a/contrib/restricted/abseil-cpp/absl/functional/internal/function_ref.h
+++ b/contrib/restricted/abseil-cpp/absl/functional/internal/function_ref.h
@@ -1,106 +1,106 @@
-// 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_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
-#define ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
-
-#include <cassert>
-#include <functional>
-#include <type_traits>
-
-#include "absl/base/internal/invoke.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
+// 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_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
+#define ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
+
+#include <cassert>
+#include <functional>
+#include <type_traits>
+
+#include "absl/base/internal/invoke.h"
+#include "absl/meta/type_traits.h"
+
+namespace absl {
ABSL_NAMESPACE_BEGIN
-namespace functional_internal {
-
-// Like a void* that can handle function pointers as well. The standard does not
-// allow function pointers to round-trip through void*, but void(*)() is fine.
-//
-// Note: It's important that this class remains trivial and is the same size as
-// a pointer, since this allows the compiler to perform tail-call optimizations
-// when the underlying function is a callable object with a matching signature.
-union VoidPtr {
- const void* obj;
- void (*fun)();
-};
-
-// Chooses the best type for passing T as an argument.
-// Attempt to be close to SystemV AMD64 ABI. Objects with trivial copy ctor are
-// passed by value.
-template <typename T>
-constexpr bool PassByValue() {
- return !std::is_lvalue_reference<T>::value &&
- absl::is_trivially_copy_constructible<T>::value &&
- absl::is_trivially_copy_assignable<
- typename std::remove_cv<T>::type>::value &&
- std::is_trivially_destructible<T>::value &&
- sizeof(T) <= 2 * sizeof(void*);
-}
-
-template <typename T>
-struct ForwardT : std::conditional<PassByValue<T>(), T, T&&> {};
-
-// An Invoker takes a pointer to the type-erased invokable object, followed by
-// the arguments that the invokable object expects.
-//
-// Note: The order of arguments here is an optimization, since member functions
-// have an implicit "this" pointer as their first argument, putting VoidPtr
-// first allows the compiler to perform tail-call optimization in many cases.
-template <typename R, typename... Args>
-using Invoker = R (*)(VoidPtr, typename ForwardT<Args>::type...);
-
-//
-// InvokeObject and InvokeFunction provide static "Invoke" functions that can be
-// used as Invokers for objects or functions respectively.
-//
-// static_cast<R> handles the case the return type is void.
-template <typename Obj, typename R, typename... Args>
-R InvokeObject(VoidPtr ptr, typename ForwardT<Args>::type... args) {
- auto o = static_cast<const Obj*>(ptr.obj);
- return static_cast<R>(
+namespace functional_internal {
+
+// Like a void* that can handle function pointers as well. The standard does not
+// allow function pointers to round-trip through void*, but void(*)() is fine.
+//
+// Note: It's important that this class remains trivial and is the same size as
+// a pointer, since this allows the compiler to perform tail-call optimizations
+// when the underlying function is a callable object with a matching signature.
+union VoidPtr {
+ const void* obj;
+ void (*fun)();
+};
+
+// Chooses the best type for passing T as an argument.
+// Attempt to be close to SystemV AMD64 ABI. Objects with trivial copy ctor are
+// passed by value.
+template <typename T>
+constexpr bool PassByValue() {
+ return !std::is_lvalue_reference<T>::value &&
+ absl::is_trivially_copy_constructible<T>::value &&
+ absl::is_trivially_copy_assignable<
+ typename std::remove_cv<T>::type>::value &&
+ std::is_trivially_destructible<T>::value &&
+ sizeof(T) <= 2 * sizeof(void*);
+}
+
+template <typename T>
+struct ForwardT : std::conditional<PassByValue<T>(), T, T&&> {};
+
+// An Invoker takes a pointer to the type-erased invokable object, followed by
+// the arguments that the invokable object expects.
+//
+// Note: The order of arguments here is an optimization, since member functions
+// have an implicit "this" pointer as their first argument, putting VoidPtr
+// first allows the compiler to perform tail-call optimization in many cases.
+template <typename R, typename... Args>
+using Invoker = R (*)(VoidPtr, typename ForwardT<Args>::type...);
+
+//
+// InvokeObject and InvokeFunction provide static "Invoke" functions that can be
+// used as Invokers for objects or functions respectively.
+//
+// static_cast<R> handles the case the return type is void.
+template <typename Obj, typename R, typename... Args>
+R InvokeObject(VoidPtr ptr, typename ForwardT<Args>::type... args) {
+ auto o = static_cast<const Obj*>(ptr.obj);
+ return static_cast<R>(
absl::base_internal::invoke(*o, std::forward<Args>(args)...));
-}
-
-template <typename Fun, typename R, typename... Args>
-R InvokeFunction(VoidPtr ptr, typename ForwardT<Args>::type... args) {
- auto f = reinterpret_cast<Fun>(ptr.fun);
- return static_cast<R>(
+}
+
+template <typename Fun, typename R, typename... Args>
+R InvokeFunction(VoidPtr ptr, typename ForwardT<Args>::type... args) {
+ auto f = reinterpret_cast<Fun>(ptr.fun);
+ return static_cast<R>(
absl::base_internal::invoke(f, std::forward<Args>(args)...));
-}
-
-template <typename Sig>
-void AssertNonNull(const std::function<Sig>& f) {
- assert(f != nullptr);
- (void)f;
-}
-
-template <typename F>
-void AssertNonNull(const F&) {}
-
-template <typename F, typename C>
-void AssertNonNull(F C::*f) {
- assert(f != nullptr);
- (void)f;
-}
-
-template <bool C>
-using EnableIf = typename ::std::enable_if<C, int>::type;
-
-} // namespace functional_internal
+}
+
+template <typename Sig>
+void AssertNonNull(const std::function<Sig>& f) {
+ assert(f != nullptr);
+ (void)f;
+}
+
+template <typename F>
+void AssertNonNull(const F&) {}
+
+template <typename F, typename C>
+void AssertNonNull(F C::*f) {
+ assert(f != nullptr);
+ (void)f;
+}
+
+template <bool C>
+using EnableIf = typename ::std::enable_if<C, int>::type;
+
+} // namespace functional_internal
ABSL_NAMESPACE_END
-} // namespace absl
-
-#endif // ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
+} // namespace absl
+
+#endif // ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_