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Side by Side Diff: base/containers/stack_container.h

Issue 1467003002: Switch to static_assert in base/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: / Created 5 years, 1 month ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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_CONTAINERS_STACK_CONTAINER_H_ 5 #ifndef BASE_CONTAINERS_STACK_CONTAINER_H_
6 #define BASE_CONTAINERS_STACK_CONTAINER_H_ 6 #define BASE_CONTAINERS_STACK_CONTAINER_H_
7 7
8 #include <string> 8 #include <string>
9 #include <vector> 9 #include <vector>
10 10
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50 T* stack_buffer() { return stack_buffer_.template data_as<T>(); } 50 T* stack_buffer() { return stack_buffer_.template data_as<T>(); }
51 const T* stack_buffer() const { 51 const T* stack_buffer() const {
52 return stack_buffer_.template data_as<T>(); 52 return stack_buffer_.template data_as<T>();
53 } 53 }
54 54
55 // The buffer itself. It is not of type T because we don't want the 55 // The buffer itself. It is not of type T because we don't want the
56 // constructors and destructors to be automatically called. Define a POD 56 // constructors and destructors to be automatically called. Define a POD
57 // buffer of the right size instead. 57 // buffer of the right size instead.
58 base::AlignedMemory<sizeof(T[stack_capacity]), ALIGNOF(T)> stack_buffer_; 58 base::AlignedMemory<sizeof(T[stack_capacity]), ALIGNOF(T)> stack_buffer_;
59 #if defined(__GNUC__) && !defined(ARCH_CPU_X86_FAMILY) 59 #if defined(__GNUC__) && !defined(ARCH_CPU_X86_FAMILY)
60 COMPILE_ASSERT(ALIGNOF(T) <= 16, crbug_115612); 60 static_assert(ALIGNOF(T) <= 16, "http://crbug.com/115612");
61 #endif 61 #endif
62 62
63 // Set when the stack buffer is used for an allocation. We do not track 63 // Set when the stack buffer is used for an allocation. We do not track
64 // how much of the buffer is used, only that somebody is using it. 64 // how much of the buffer is used, only that somebody is using it.
65 bool used_stack_buffer_; 65 bool used_stack_buffer_;
66 }; 66 };
67 67
68 // Used by containers when they want to refer to an allocator of type U. 68 // Used by containers when they want to refer to an allocator of type U.
69 template<typename U> 69 template<typename U>
70 struct rebind { 70 struct rebind {
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257 // operator-> (using "->at()" does exception stuff we don't want). 257 // operator-> (using "->at()" does exception stuff we don't want).
258 T& operator[](size_t i) { return this->container().operator[](i); } 258 T& operator[](size_t i) { return this->container().operator[](i); }
259 const T& operator[](size_t i) const { 259 const T& operator[](size_t i) const {
260 return this->container().operator[](i); 260 return this->container().operator[](i);
261 } 261 }
262 }; 262 };
263 263
264 } // namespace base 264 } // namespace base
265 265
266 #endif // BASE_CONTAINERS_STACK_CONTAINER_H_ 266 #endif // BASE_CONTAINERS_STACK_CONTAINER_H_
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