chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay?

Change-Id: If701571d9716de308d3512e1eb22c35db0877a66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 139 deletions

diff --git a/third_party/abseil_cpp/absl/functional/function_ref.h b/third_party/abseil_cpp/absl/functional/function_ref.h
deleted file mode 100644
index 6e03ac2e04e9..000000000000
--- a/third_party/abseil_cpp/absl/functional/function_ref.h
+++ /dev/null
@@ -1,139 +0,0 @@
-// 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/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,
-            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&>>
-  FunctionRef(const F& f)  // NOLINT(runtime/explicit)
-      : 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;
-
-  // 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_