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-rw-r--r--libcxx/test/containers/min_allocator.h268
1 files changed, 268 insertions, 0 deletions
diff --git a/libcxx/test/containers/min_allocator.h b/libcxx/test/containers/min_allocator.h
new file mode 100644
index 00000000000..7aa197758a5
--- /dev/null
+++ b/libcxx/test/containers/min_allocator.h
@@ -0,0 +1,268 @@
+#ifndef MIN_ALLOCATOR_H
+#define MIN_ALLOCATOR_H
+
+#if __cplusplus >= 201103L
+
+#include <memory>
+
+template <class T> class min_pointer;
+template <class T> class min_pointer<const T>;
+template <> class min_pointer<void>;
+template <> class min_pointer<const void>;
+template <class T> class min_allocator;
+
+template <class T>
+bool
+operator==(min_pointer<T> x, min_pointer<T> y);
+
+template <>
+class min_pointer<const void>
+{
+ const void* ptr_;
+public:
+ min_pointer() noexcept = default;
+ min_pointer(std::nullptr_t) : ptr_(nullptr) {}
+ template <class T>
+ min_pointer(min_pointer<T> p) : ptr_(p.ptr_) {}
+
+ explicit operator bool() const {return ptr_ != nullptr;}
+
+ template <class U> friend bool operator==(min_pointer<U>, min_pointer<U>);
+ template <class U> friend class min_pointer;
+};
+
+template <>
+class min_pointer<void>
+{
+ void* ptr_;
+public:
+ min_pointer() noexcept = default;
+ min_pointer(std::nullptr_t) : ptr_(nullptr) {}
+ template <class T,
+ class = typename std::enable_if
+ <
+ !std::is_const<T>::value
+ >::type
+ >
+ min_pointer(min_pointer<T> p) : ptr_(p.ptr_) {}
+
+ explicit operator bool() const {return ptr_ != nullptr;}
+
+ template <class U> friend bool operator==(min_pointer<U>, min_pointer<U>);
+ template <class U> friend class min_pointer;
+};
+
+template <class T>
+class min_pointer
+{
+ T* ptr_;
+
+ explicit min_pointer(T* p) : ptr_(p) {}
+public:
+ min_pointer() noexcept = default;
+ min_pointer(std::nullptr_t) : ptr_(nullptr) {}
+ explicit min_pointer(min_pointer<void> p) : ptr_(static_cast<T*>(p.ptr_)) {}
+
+ explicit operator bool() const {return ptr_ != nullptr;}
+
+ typedef std::ptrdiff_t difference_type;
+ typedef T& reference;
+ typedef T* pointer;
+ typedef T value_type;
+ typedef std::random_access_iterator_tag iterator_category;
+
+ reference operator*() const {return *ptr_;}
+ pointer operator->() const {return ptr_;}
+
+ min_pointer& operator++() {++ptr_; return *this;}
+ min_pointer operator++(int) {min_pointer tmp(*this); ++ptr_; return tmp;}
+
+ min_pointer& operator--() {--ptr_; return *this;}
+ min_pointer operator--(int) {min_pointer tmp(*this); --ptr_; return tmp;}
+
+ min_pointer& operator+=(difference_type n) {ptr_ += n; return *this;}
+ min_pointer& operator-=(difference_type n) {ptr_ -= n; return *this;}
+
+ min_pointer operator+(difference_type n) const
+ {
+ min_pointer tmp(*this);
+ tmp += n;
+ return tmp;
+ }
+
+ friend min_pointer operator+(difference_type n, min_pointer x)
+ {
+ return x + n;
+ }
+
+ min_pointer operator-(difference_type n) const
+ {
+ min_pointer tmp(*this);
+ tmp -= n;
+ return tmp;
+ }
+
+ friend difference_type operator-(min_pointer x, min_pointer y)
+ {
+ return x.ptr_ - y.ptr_;
+ }
+
+ reference operator[](difference_type n) const {return ptr_[n];}
+
+ friend bool operator< (min_pointer x, min_pointer y) {return x.ptr_ < y.ptr_;}
+ friend bool operator> (min_pointer x, min_pointer y) {return y < x;}
+ friend bool operator<=(min_pointer x, min_pointer y) {return !(y < x);}
+ friend bool operator>=(min_pointer x, min_pointer y) {return !(x < y);}
+
+ static min_pointer pointer_to(T& t) {return min_pointer(std::addressof(t));}
+
+ template <class U> friend bool operator==(min_pointer<U>, min_pointer<U>);
+ template <class U> friend class min_pointer;
+ template <class U> friend class min_allocator;
+};
+
+template <class T>
+class min_pointer<const T>
+{
+ const T* ptr_;
+
+ explicit min_pointer(const T* p) : ptr_(p) {}
+public:
+ min_pointer() noexcept = default;
+ min_pointer(std::nullptr_t) : ptr_(nullptr) {}
+ min_pointer(min_pointer<T> p) : ptr_(p.ptr_) {}
+ explicit min_pointer(min_pointer<const void> p) : ptr_(static_cast<const T*>(p.ptr_)) {}
+
+ explicit operator bool() const {return ptr_ != nullptr;}
+
+ typedef std::ptrdiff_t difference_type;
+ typedef const T& reference;
+ typedef const T* pointer;
+ typedef const T value_type;
+ typedef std::random_access_iterator_tag iterator_category;
+
+ reference operator*() const {return *ptr_;}
+ pointer operator->() const {return ptr_;}
+
+ min_pointer& operator++() {++ptr_; return *this;}
+ min_pointer operator++(int) {min_pointer tmp(*this); ++ptr_; return tmp;}
+
+ min_pointer& operator--() {--ptr_; return *this;}
+ min_pointer operator--(int) {min_pointer tmp(*this); --ptr_; return tmp;}
+
+ min_pointer& operator+=(difference_type n) {ptr_ += n; return *this;}
+ min_pointer& operator-=(difference_type n) {ptr_ -= n; return *this;}
+
+ min_pointer operator+(difference_type n) const
+ {
+ min_pointer tmp(*this);
+ tmp += n;
+ return tmp;
+ }
+
+ friend min_pointer operator+(difference_type n, min_pointer x)
+ {
+ return x + n;
+ }
+
+ min_pointer operator-(difference_type n) const
+ {
+ min_pointer tmp(*this);
+ tmp -= n;
+ return tmp;
+ }
+
+ friend difference_type operator-(min_pointer x, min_pointer y)
+ {
+ return x.ptr_ - y.ptr_;
+ }
+
+ reference operator[](difference_type n) const {return ptr_[n];}
+
+ friend bool operator< (min_pointer x, min_pointer y) {return x.ptr_ < y.ptr_;}
+ friend bool operator> (min_pointer x, min_pointer y) {return y < x;}
+ friend bool operator<=(min_pointer x, min_pointer y) {return !(y < x);}
+ friend bool operator>=(min_pointer x, min_pointer y) {return !(x < y);}
+
+ static min_pointer pointer_to(const T& t) {return min_pointer(std::addressof(t));}
+
+ template <class U> friend bool operator==(min_pointer<U>, min_pointer<U>);
+ template <class U> friend class min_pointer;
+};
+
+template <class T>
+inline
+bool
+operator==(min_pointer<T> x, min_pointer<T> y)
+{
+ return x.ptr_ == y.ptr_;
+}
+
+template <class T>
+inline
+bool
+operator!=(min_pointer<T> x, min_pointer<T> y)
+{
+ return !(x == y);
+}
+
+template <class T>
+inline
+bool
+operator==(min_pointer<T> x, std::nullptr_t)
+{
+ return !static_cast<bool>(x);
+}
+
+template <class T>
+inline
+bool
+operator==(std::nullptr_t, min_pointer<T> x)
+{
+ return !static_cast<bool>(x);
+}
+
+template <class T>
+inline
+bool
+operator!=(min_pointer<T> x, std::nullptr_t)
+{
+ return static_cast<bool>(x);
+}
+
+template <class T>
+inline
+bool
+operator!=(std::nullptr_t, min_pointer<T> x)
+{
+ return static_cast<bool>(x);
+}
+
+template <class T>
+class min_allocator
+{
+public:
+ typedef T value_type;
+ typedef min_pointer<T> pointer;
+
+ min_allocator() = default;
+ template <class U>
+ min_allocator(min_allocator<U>) {}
+
+ pointer allocate(std::ptrdiff_t n)
+ {
+ return pointer(static_cast<T*>(::operator new(n*sizeof(T))));
+ }
+
+ void deallocate(pointer p, std::ptrdiff_t)
+ {
+ return ::operator delete(p.ptr_);
+ }
+
+ friend bool operator==(min_allocator, min_allocator) {return true;}
+ friend bool operator!=(min_allocator x, min_allocator y) {return !(x == y);}
+};
+
+#endif // __cplusplus >= 201103L
+
+#endif // MIN_ALLOCATOR_H
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