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Side by Side Diff: base/bind_internal.h

Issue 2797133002: Replace base::get with std::get (Closed)
Patch Set: +styleguide Created 3 years, 8 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef BASE_BIND_INTERNAL_H_ 5 #ifndef BASE_BIND_INTERNAL_H_
6 #define BASE_BIND_INTERNAL_H_ 6 #define BASE_BIND_INTERNAL_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 9
10 #include <tuple> 10 #include <tuple>
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353 353
354 using DecayedArgsTuple = typename std::decay<BoundArgsTuple>::type; 354 using DecayedArgsTuple = typename std::decay<BoundArgsTuple>::type;
355 static constexpr bool is_weak_call = 355 static constexpr bool is_weak_call =
356 IsWeakMethod<is_method, 356 IsWeakMethod<is_method,
357 typename std::tuple_element< 357 typename std::tuple_element<
358 indices, 358 indices,
359 DecayedArgsTuple>::type...>::value; 359 DecayedArgsTuple>::type...>::value;
360 360
361 return InvokeHelper<is_weak_call, R>::MakeItSo( 361 return InvokeHelper<is_weak_call, R>::MakeItSo(
362 std::forward<Functor>(functor), 362 std::forward<Functor>(functor),
363 Unwrap(base::get<indices>(std::forward<BoundArgsTuple>(bound)))..., 363 Unwrap(std::get<indices>(std::forward<BoundArgsTuple>(bound)))...,
364 std::forward<UnboundArgs>(unbound_args)...); 364 std::forward<UnboundArgs>(unbound_args)...);
365 } 365 }
366 }; 366 };
367 367
368 // Used to implement MakeUnboundRunType. 368 // Used to implement MakeUnboundRunType.
369 template <typename Functor, typename... BoundArgs> 369 template <typename Functor, typename... BoundArgs>
370 struct MakeUnboundRunTypeImpl { 370 struct MakeUnboundRunTypeImpl {
371 using RunType = 371 using RunType =
372 typename FunctorTraits<typename std::decay<Functor>::type>::RunType; 372 typename FunctorTraits<typename std::decay<Functor>::type>::RunType;
373 using ReturnType = ExtractReturnType<RunType>; 373 using ReturnType = ExtractReturnType<RunType>;
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386 IsNull(const Functor&) { 386 IsNull(const Functor&) {
387 return false; 387 return false;
388 } 388 }
389 389
390 // Used by ApplyCancellationTraits below. 390 // Used by ApplyCancellationTraits below.
391 template <typename Functor, typename BoundArgsTuple, size_t... indices> 391 template <typename Functor, typename BoundArgsTuple, size_t... indices>
392 bool ApplyCancellationTraitsImpl(const Functor& functor, 392 bool ApplyCancellationTraitsImpl(const Functor& functor,
393 const BoundArgsTuple& bound_args, 393 const BoundArgsTuple& bound_args,
394 IndexSequence<indices...>) { 394 IndexSequence<indices...>) {
395 return CallbackCancellationTraits<Functor, BoundArgsTuple>::IsCancelled( 395 return CallbackCancellationTraits<Functor, BoundArgsTuple>::IsCancelled(
396 functor, base::get<indices>(bound_args)...); 396 functor, std::get<indices>(bound_args)...);
397 } 397 }
398 398
399 // Relays |base| to corresponding CallbackCancellationTraits<>::Run(). Returns 399 // Relays |base| to corresponding CallbackCancellationTraits<>::Run(). Returns
400 // true if the callback |base| represents is canceled. 400 // true if the callback |base| represents is canceled.
401 template <typename BindStateType> 401 template <typename BindStateType>
402 bool ApplyCancellationTraits(const BindStateBase* base) { 402 bool ApplyCancellationTraits(const BindStateBase* base) {
403 const BindStateType* storage = static_cast<const BindStateType*>(base); 403 const BindStateType* storage = static_cast<const BindStateType*>(base);
404 static constexpr size_t num_bound_args = 404 static constexpr size_t num_bound_args =
405 std::tuple_size<decltype(storage->bound_args_)>::value; 405 std::tuple_size<decltype(storage->bound_args_)>::value;
406 return ApplyCancellationTraitsImpl(storage->functor_, storage->bound_args_, 406 return ApplyCancellationTraitsImpl(storage->functor_, storage->bound_args_,
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534 534
535 // Returns a RunType of bound functor. 535 // Returns a RunType of bound functor.
536 // E.g. MakeUnboundRunType<R(A, B, C), A, B> is evaluated to R(C). 536 // E.g. MakeUnboundRunType<R(A, B, C), A, B> is evaluated to R(C).
537 template <typename Functor, typename... BoundArgs> 537 template <typename Functor, typename... BoundArgs>
538 using MakeUnboundRunType = 538 using MakeUnboundRunType =
539 typename internal::MakeUnboundRunTypeImpl<Functor, BoundArgs...>::Type; 539 typename internal::MakeUnboundRunTypeImpl<Functor, BoundArgs...>::Type;
540 540
541 } // namespace base 541 } // namespace base
542 542
543 #endif // BASE_BIND_INTERNAL_H_ 543 #endif // BASE_BIND_INTERNAL_H_
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