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Side by Side Diff: base/memory/scoped_ptr.h

Issue 1774443002: Replace template_util.h stuff with C++11 <type_traits> (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: revert unrelated whitespace change Created 4 years, 9 months 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 // Scopers help you manage ownership of a pointer, helping you easily manage a 5 // Scopers help you manage ownership of a pointer, helping you easily manage a
6 // pointer within a scope, and automatically destroying the pointer at the end 6 // pointer within a scope, and automatically destroying the pointer at the end
7 // of a scope. There are two main classes you will use, which correspond to the 7 // of a scope. There are two main classes you will use, which correspond to the
8 // operators new/delete and new[]/delete[]. 8 // operators new/delete and new[]/delete[].
9 // 9 //
10 // Example usage (scoped_ptr<T>): 10 // Example usage (scoped_ptr<T>):
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95 95
96 #include <iosfwd> 96 #include <iosfwd>
97 #include <memory> 97 #include <memory>
98 #include <type_traits> 98 #include <type_traits>
99 #include <utility> 99 #include <utility>
100 100
101 #include "base/compiler_specific.h" 101 #include "base/compiler_specific.h"
102 #include "base/logging.h" 102 #include "base/logging.h"
103 #include "base/macros.h" 103 #include "base/macros.h"
104 #include "base/move.h" 104 #include "base/move.h"
105 #include "base/template_util.h"
106 #include "build/build_config.h" 105 #include "build/build_config.h"
107 106
108 namespace base { 107 namespace base {
109 108
110 // Function object which invokes 'free' on its parameter, which must be 109 // Function object which invokes 'free' on its parameter, which must be
111 // a pointer. Can be used to store malloc-allocated pointers in scoped_ptr: 110 // a pointer. Can be used to store malloc-allocated pointers in scoped_ptr:
112 // 111 //
113 // scoped_ptr<int, base::FreeDeleter> foo_ptr( 112 // scoped_ptr<int, base::FreeDeleter> foo_ptr(
114 // static_cast<int*>(malloc(sizeof(int)))); 113 // static_cast<int*>(malloc(sizeof(int))));
115 struct FreeDeleter { 114 struct FreeDeleter {
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172 171
173 namespace subtle { 172 namespace subtle {
174 class RefCountedBase; 173 class RefCountedBase;
175 class RefCountedThreadSafeBase; 174 class RefCountedThreadSafeBase;
176 } // namespace subtle 175 } // namespace subtle
177 176
178 namespace internal { 177 namespace internal {
179 178
180 template <typename T> struct IsNotRefCounted { 179 template <typename T> struct IsNotRefCounted {
181 enum { 180 enum {
182 value = !base::is_convertible<T*, base::subtle::RefCountedBase*>::value && 181 value = !std::is_convertible<T*, base::subtle::RefCountedBase*>::value &&
183 !base::is_convertible<T*, base::subtle::RefCountedThreadSafeBase*>:: 182 !std::is_convertible<T*, base::subtle::RefCountedThreadSafeBase*>::
184 value 183 value
185 }; 184 };
186 }; 185 };
187 186
188 // Minimal implementation of the core logic of scoped_ptr, suitable for 187 // Minimal implementation of the core logic of scoped_ptr, suitable for
189 // reuse in both scoped_ptr and its specializations. 188 // reuse in both scoped_ptr and its specializations.
190 template <class T, class D> 189 template <class T, class D>
191 class scoped_ptr_impl { 190 class scoped_ptr_impl {
192 public: 191 public:
193 explicit scoped_ptr_impl(T* p) : data_(p) {} 192 explicit scoped_ptr_impl(T* p) : data_(p) {}
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671 670
672 // A function to convert T* into scoped_ptr<T> 671 // A function to convert T* into scoped_ptr<T>
673 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation 672 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation
674 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg)) 673 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
675 template <typename T> 674 template <typename T>
676 scoped_ptr<T> make_scoped_ptr(T* ptr) { 675 scoped_ptr<T> make_scoped_ptr(T* ptr) {
677 return scoped_ptr<T>(ptr); 676 return scoped_ptr<T>(ptr);
678 } 677 }
679 678
680 #endif // BASE_MEMORY_SCOPED_PTR_H_ 679 #endif // BASE_MEMORY_SCOPED_PTR_H_
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