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add exempt_ptr
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bolero-MURAKAMI
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61dd3351fc
commit
2342ac6433
2 changed files with 250 additions and 0 deletions
249
sprout/exempt_ptr.hpp
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249
sprout/exempt_ptr.hpp
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@ -0,0 +1,249 @@
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/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_EXEMPT_PTR_HPP
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#define SPROUT_EXEMPT_PTR_HPP
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#include <cstddef>
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#include <functional>
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#include <iterator>
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#include <type_traits>
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#include <utility>
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#include <sprout/config.hpp>
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namespace sprout {
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//
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// exempt_ptr
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//
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template<typename T>
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class exempt_ptr {
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public:
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typedef T value_type;
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typedef T* pointer;
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typedef T const* const_pointer;
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typedef T& reference;
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typedef T const& const_reference;
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typedef std::ptrdiff_t difference_type;
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typedef std::random_access_iterator_tag iterator_category;
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private:
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pointer p_;
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private:
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template<typename P>
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static SPROUT_CONSTEXPR bool is_compat() {
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return std::is_convertible<P*, pointer>::value;
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}
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public:
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SPROUT_CONSTEXPR exempt_ptr() SPROUT_NOEXCEPT
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: p_()
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{}
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SPROUT_CONSTEXPR exempt_ptr(std::nullptr_t) SPROUT_NOEXCEPT
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: exempt_ptr()
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{}
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explicit SPROUT_CONSTEXPR exempt_ptr(pointer other) SPROUT_NOEXCEPT
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: p_(other)
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{}
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template<
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typename U,
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typename sprout::enabler_if<std::is_convertible<U*, pointer>::value>::type = sprout::enabler
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>
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explicit SPROUT_CONSTEXPR exempt_ptr(U* other) SPROUT_NOEXCEPT
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: p_(other)
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{}
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template<
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typename U,
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typename sprout::enabler_if<std::is_convertible<U*, pointer>::value>::type = sprout::enabler
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>
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SPROUT_CONSTEXPR exempt_ptr(sprout::exempt_ptr<U> const& other) SPROUT_NOEXCEPT
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: p_(other.get())
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{}
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SPROUT_CXX14_CONSTEXPR exempt_ptr&
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operator=(std::nullptr_t) SPROUT_NOEXCEPT {
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reset();
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return *this;
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}
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template<
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typename U,
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typename sprout::enabler_if<std::is_convertible<U*, pointer>::value>::type = sprout::enabler
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>
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SPROUT_CXX14_CONSTEXPR exempt_ptr&
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operator=(U* other) SPROUT_NOEXCEPT {
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reset(other);
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return *this;
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}
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template<
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typename U,
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typename sprout::enabler_if<std::is_convertible<U*, pointer>::value>::type = sprout::enabler
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>
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SPROUT_CXX14_CONSTEXPR exempt_ptr&
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operator=(exempt_ptr<U> const& other) SPROUT_NOEXCEPT {
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reset(other.get());
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return *this;
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}
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SPROUT_CONSTEXPR pointer
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get() const SPROUT_NOEXCEPT {
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return p_;
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}
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SPROUT_CONSTEXPR reference
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operator*() const SPROUT_NOEXCEPT {
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return *get();
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}
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SPROUT_CONSTEXPR pointer
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operator->() const SPROUT_NOEXCEPT {
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return get();
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}
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SPROUT_EXPLICIT_CONVERSION SPROUT_CONSTEXPR operator bool() const SPROUT_NOEXCEPT {
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return get();
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}
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SPROUT_CONSTEXPR operator pointer() SPROUT_NOEXCEPT {
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return get();
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}
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SPROUT_CONSTEXPR operator const_pointer() const SPROUT_NOEXCEPT {
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return get();
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}
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SPROUT_CXX14_CONSTEXPR pointer
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release() SPROUT_NOEXCEPT {
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pointer old = get();
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reset();
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return old;
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}
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SPROUT_CXX14_CONSTEXPR void
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reset(pointer t = 0) SPROUT_NOEXCEPT {
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p_ = t;
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}
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SPROUT_CXX14_CONSTEXPR void
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swap(exempt_ptr& other) SPROUT_NOEXCEPT {
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swap(p_, other.p_);
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr&
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operator++() {
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++p_;
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr&
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operator--() {
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--p_;
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return *this;
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr operator++(int) {
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pointer tmp = p_; ++p_; return exempt_ptr{tmp};
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr operator--(int) {
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pointer tmp = p_; --p_; return exempt_ptr{tmp};
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr
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operator+() const {
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return *this; }
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SPROUT_CXX14_CONSTEXPR exempt_ptr
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operator+(std::ptrdiff_t d) const {
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return exempt_ptr{p_+d};
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}
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SPROUT_CXX14_CONSTEXPR exempt_ptr
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operator-(std::ptrdiff_t d) const {
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return exempt_ptr{p_-d};
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}
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SPROUT_CXX14_CONSTEXPR value_type&
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operator[](std::ptrdiff_t k) {
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return p_[k];
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}
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SPROUT_CXX14_CONSTEXPR value_type const&
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operator[](std::ptrdiff_t k) const {
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return p_[k];
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}
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};
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//
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// swap
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//
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template<typename T>
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inline SPROUT_CXX14_CONSTEXPR void
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swap(sprout::exempt_ptr<T>& x, sprout::exempt_ptr<T>& y) SPROUT_NOEXCEPT {
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x.swap(y);
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}
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//
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// make_exempt
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//
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template<typename T>
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inline SPROUT_CONSTEXPR sprout::exempt_ptr<T>
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make_exempt(T* p) SPROUT_NOEXCEPT {
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return sprout::exempt_ptr<T>(p);
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}
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//
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// operator==
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// operator!=
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//
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator==(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) SPROUT_NOEXCEPT {
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return x.get() == y.get();
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}
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator!=(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) SPROUT_NOEXCEPT {
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return !(x == y);
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}
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template<typename T>
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inline SPROUT_CONSTEXPR bool
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operator==(sprout::exempt_ptr<T> const& x, std::nullptr_t y) SPROUT_NOEXCEPT {
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return x.get() == y;
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}
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template<typename T>
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inline SPROUT_CONSTEXPR bool
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operator!=(sprout::exempt_ptr<T> const& x, std::nullptr_t y) SPROUT_NOEXCEPT {
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return !(x == y);
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}
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template<typename T>
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inline SPROUT_CONSTEXPR bool
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operator==(std::nullptr_t x, sprout::exempt_ptr<T> const& y) SPROUT_NOEXCEPT {
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return x == y.get();
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}
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template<typename T>
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inline SPROUT_CONSTEXPR bool
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operator!=(std::nullptr_t x, sprout::exempt_ptr<T> const& y) SPROUT_NOEXCEPT {
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return !(x == y);
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}
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//
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// operator<
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// operator>
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// operator=<
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// operator=>
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//
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator<(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) {
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return x.get() < y.get();
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}
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator>(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) {
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return y < x;
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}
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator<=(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) {
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return !(y < x);
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}
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template<typename T, typename U>
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inline SPROUT_CONSTEXPR bool
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operator>=(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<U> const& y) {
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return !(x < y);
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}
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//
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// operator+
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// operator-
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//
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template<typename T>
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inline SPROUT_CONSTEXPR sprout::exempt_ptr<T>
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operator+(std::ptrdiff_t d, sprout::exempt_ptr<T> const& p) {
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return p + d;
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}
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template<typename T>
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inline SPROUT_CONSTEXPR std::ptrdiff_t
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operator-(sprout::exempt_ptr<T> const& x, sprout::exempt_ptr<T> const& y) {
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return x.get() - y.get();
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_EXEMPT_PTR_HPP
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@ -36,6 +36,7 @@
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#include <sprout/cwctype.hpp>
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#include <sprout/darkroom.hpp>
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#include <sprout/endian_traits.hpp>
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#include <sprout/exempt_ptr.hpp>
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#include <sprout/functional.hpp>
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#include <sprout/generator.hpp>
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#include <sprout/index_tuple.hpp>
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