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Diffstat (limited to 'third_party/abseil_cpp/absl/functional/internal/front_binder.h')
-rw-r--r-- | third_party/abseil_cpp/absl/functional/internal/front_binder.h | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/third_party/abseil_cpp/absl/functional/internal/front_binder.h b/third_party/abseil_cpp/absl/functional/internal/front_binder.h deleted file mode 100644 index 45f52de73d25..000000000000 --- a/third_party/abseil_cpp/absl/functional/internal/front_binder.h +++ /dev/null @@ -1,95 +0,0 @@ -// Copyright 2018 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. - -// Implementation details for `absl::bind_front()`. - -#ifndef ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_ -#define ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_ - -#include <cstddef> -#include <type_traits> -#include <utility> - -#include "absl/base/internal/invoke.h" -#include "absl/container/internal/compressed_tuple.h" -#include "absl/meta/type_traits.h" -#include "absl/utility/utility.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace functional_internal { - -// Invoke the method, expanding the tuple of bound arguments. -template <class R, class Tuple, size_t... Idx, class... Args> -R Apply(Tuple&& bound, absl::index_sequence<Idx...>, Args&&... free) { - return base_internal::invoke( - absl::forward<Tuple>(bound).template get<Idx>()..., - absl::forward<Args>(free)...); -} - -template <class F, class... BoundArgs> -class FrontBinder { - using BoundArgsT = absl::container_internal::CompressedTuple<F, BoundArgs...>; - using Idx = absl::make_index_sequence<sizeof...(BoundArgs) + 1>; - - BoundArgsT bound_args_; - - public: - template <class... Ts> - constexpr explicit FrontBinder(absl::in_place_t, Ts&&... ts) - : bound_args_(absl::forward<Ts>(ts)...) {} - - template <class... FreeArgs, class R = base_internal::invoke_result_t< - F&, BoundArgs&..., FreeArgs&&...>> - R operator()(FreeArgs&&... free_args) & { - return functional_internal::Apply<R>(bound_args_, Idx(), - absl::forward<FreeArgs>(free_args)...); - } - - template <class... FreeArgs, - class R = base_internal::invoke_result_t< - const F&, const BoundArgs&..., FreeArgs&&...>> - R operator()(FreeArgs&&... free_args) const& { - return functional_internal::Apply<R>(bound_args_, Idx(), - absl::forward<FreeArgs>(free_args)...); - } - - template <class... FreeArgs, class R = base_internal::invoke_result_t< - F&&, BoundArgs&&..., FreeArgs&&...>> - R operator()(FreeArgs&&... free_args) && { - // This overload is called when *this is an rvalue. If some of the bound - // arguments are stored by value or rvalue reference, we move them. - return functional_internal::Apply<R>(absl::move(bound_args_), Idx(), - absl::forward<FreeArgs>(free_args)...); - } - - template <class... FreeArgs, - class R = base_internal::invoke_result_t< - const F&&, const BoundArgs&&..., FreeArgs&&...>> - R operator()(FreeArgs&&... free_args) const&& { - // This overload is called when *this is an rvalue. If some of the bound - // arguments are stored by value or rvalue reference, we move them. - return functional_internal::Apply<R>(absl::move(bound_args_), Idx(), - absl::forward<FreeArgs>(free_args)...); - } -}; - -template <class F, class... BoundArgs> -using bind_front_t = FrontBinder<decay_t<F>, absl::decay_t<BoundArgs>...>; - -} // namespace functional_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_ |