/usr/include/hphp/util/default-ptr.h is in hhvm-dev 3.11.1+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | /*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2015 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_DEFAULT_PTR_H_
#define incl_HPHP_DEFAULT_PTR_H_
#include <cstddef>
#include <utility>
namespace HPHP {
///////////////////////////////////////////////////////////////////////////////
/*
* Pointer which can be safely const-dereferenced when null to yield a
* default-constructed value.
*/
template <class T>
struct default_ptr {
/*
* Constructors.
*/
default_ptr() = default;
/* implicit */ default_ptr(std::nullptr_t) {}
/* implicit */ default_ptr(T* p) : m_p{p ? p : fallback()} {}
/*
* Assignments.
*/
default_ptr& operator=(std::nullptr_t p) {
m_p = fallback();
return *this;
}
default_ptr& operator=(T* p) {
m_p = p ? p : fallback();
return *this;
}
/*
* Observers.
*/
const T* get() const {
return m_p;
}
const T& operator*() const {
return *get();
}
const T* operator->() const {
return get();
}
T* raw() const {
return m_p == &s_default ? nullptr : m_p;
}
explicit operator bool() const {
return raw();
}
/*
* Modifiers.
*/
void reset(T* p = nullptr) {
operator=(p);
}
private:
/*
* Internals.
*/
static T* fallback() {
return const_cast<T*>(&s_default);
}
private:
T* m_p{const_cast<T*>(&s_default)};
static const T s_default;
};
template <class T>
const T default_ptr<T>::s_default;
///////////////////////////////////////////////////////////////////////////////
}
#endif // incl_HPHP_DEFAULT_PTR_H_
|