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support constexpr: get(optional&), get(optional&&)

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bolero-MURAKAMI 2013-06-04 23:15:05 +09:00
parent 5bf20db49b
commit e578bdd0a6
6 changed files with 174 additions and 77 deletions
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47
sprout/utility/value_holder/get.hpp
View file

@ -3,44 +3,55 @@
#include <sprout/config.hpp>
#include <sprout/utility/value_holder/value_holder.hpp>
#include <sprout/utility/move.hpp>
namespace sprout {
//
// get
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::reference_const_type
get(sprout::value_holder<T> const& x) {
return x.get();
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::reference_type
get(sprout::value_holder<T>& x) {
return sprout::value_holder<T>::get(x);
}
template<typename T>
inline typename sprout::value_holder<T>::reference_type
get(sprout::value_holder<T>& x) {
return x.get();
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::rvalue_reference
get(sprout::value_holder<T>&& x) {
return sprout::value_holder<T>::get(sprout::move(x));
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::reference_const_type
get(sprout::value_holder<T> const& x) {
return sprout::value_holder<T>::get(x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_type
get(sprout::value_holder<T>* x) {
return sprout::value_holder<T>::get_pointer(*x);
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_const_type
get(sprout::value_holder<T> const* x) {
return x->get_pointer();
}
template<typename T>
inline typename sprout::value_holder<T>::pointer_type
get(sprout::value_holder<T>* x) {
return x->get_pointer();
return sprout::value_holder<T>::get_pointer(*x);
}
//
// get_pointer
//
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_const_type
get_pointer(sprout::value_holder<T> const& x) {
return x.get_pointer();
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_type
get_pointer(sprout::value_holder<T>& x) {
return sprout::value_holder<T>::get_pointer(x);
}
template<typename T>
inline typename sprout::value_holder<T>::pointer_type
get_pointer(sprout::value_holder<T>& x) {
return x.get_pointer();
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_type
get_pointer(sprout::value_holder<T>&& x) {
return sprout::value_holder<T>::get_pointer(sprout::move(x));
}
template<typename T>
inline SPROUT_CONSTEXPR typename sprout::value_holder<T>::pointer_const_type
get_pointer(sprout::value_holder<T> const& x) {
return sprout::value_holder<T>::get_pointer(x);
}
} // namespace sprout

67
sprout/utility/value_holder/value_holder.hpp
View file

@ -15,8 +15,12 @@ namespace sprout {
struct holder_helper {
public:
typedef T value_type;
typedef T& reference;
typedef T const& const_reference;
typedef T& lvalue_reference;
typedef T&& rvalue_reference;
typedef lvalue_reference reference;
typedef T const& const_lvalue_reference;
typedef T const&& const_rvalue_reference;
typedef const_lvalue_reference const_reference;
typedef T const& mutable_or_const_reference;
typedef T* pointer;
typedef T const* const_pointer;
@ -48,8 +52,12 @@ namespace sprout {
struct holder_helper<T const> {
public:
typedef T value_type;
typedef T const& reference;
typedef T const& const_reference;
typedef T const& lvalue_reference;
typedef T const&& rvalue_reference;
typedef lvalue_reference reference;
typedef T const& const_lvalue_reference;
typedef T const&& const_rvalue_reference;
typedef const_lvalue_reference const_reference;
typedef T const& mutable_or_const_reference;
typedef T const* pointer;
typedef T const* const_pointer;
@ -81,8 +89,12 @@ namespace sprout {
struct holder_helper<T&> {
public:
typedef T value_type;
typedef T& reference;
typedef T const& const_reference;
typedef T& lvalue_reference;
typedef T& rvalue_reference;
typedef lvalue_reference reference;
typedef T const& const_lvalue_reference;
typedef T const& const_rvalue_reference;
typedef const_lvalue_reference const_reference;
typedef T& mutable_or_const_reference;
typedef T* pointer;
typedef T const* const_pointer;
@ -105,8 +117,12 @@ namespace sprout {
struct holder_helper<T const&> {
public:
typedef T value_type;
typedef T const& reference;
typedef T const& const_reference;
typedef T const& lvalue_reference;
typedef T const& rvalue_reference;
typedef lvalue_reference reference;
typedef T const& const_lvalue_reference;
typedef T const& const_rvalue_reference;
typedef const_lvalue_reference const_reference;
typedef T const& mutable_or_const_reference;
typedef T const* pointer;
typedef T const* const_pointer;
@ -138,7 +154,11 @@ namespace sprout {
typedef typename helper_type::holder_type holder_type;
public:
typedef typename helper_type::value_type value_type;
typedef typename helper_type::lvalue_reference lvalue_reference;
typedef typename helper_type::rvalue_reference rvalue_reference;
typedef typename helper_type::reference reference;
typedef typename helper_type::const_lvalue_reference const_lvalue_reference;
typedef typename helper_type::const_rvalue_reference const_rvalue_reference;
typedef typename helper_type::const_reference const_reference;
typedef typename helper_type::mutable_or_const_reference mutable_or_const_reference;
typedef typename helper_type::pointer pointer;
@ -146,12 +166,33 @@ namespace sprout {
typedef typename helper_type::mutable_or_const_pointer mutable_or_const_pointer;
typedef typename helper_type::param_type param_type;
typedef typename helper_type::movable_param_type movable_param_type;
typedef lvalue_reference lvalue_reference_type;
typedef rvalue_reference rvalue_reference_type;
typedef reference reference_type;
typedef mutable_or_const_reference reference_const_type;
typedef pointer pointer_type;
typedef mutable_or_const_pointer pointer_const_type;
typedef param_type argument_type;
typedef movable_param_type movable_argument_type;
public:
static SPROUT_CONSTEXPR reference get(value_holder& t) SPROUT_NOEXCEPT {
return helper_type::ref(t.holder_);
}
static SPROUT_CONSTEXPR rvalue_reference get(value_holder&& t) SPROUT_NOEXCEPT {
return static_cast<rvalue_reference>(get(t));
}
static SPROUT_CONSTEXPR mutable_or_const_reference get(value_holder const& t) SPROUT_NOEXCEPT {
return helper_type::ref(t.holder_);
}
static SPROUT_CONSTEXPR pointer get_pointer(value_holder& t) SPROUT_NOEXCEPT {
return helper_type::ptr(t.holder_);
}
static SPROUT_CONSTEXPR pointer get_pointer(value_holder&& t) SPROUT_NOEXCEPT {
return get_pointer(t);
}
static SPROUT_CONSTEXPR mutable_or_const_pointer get_pointer(value_holder const& t) SPROUT_NOEXCEPT {
return helper_type::ptr(t.holder_);
}
private:
holder_type holder_;
public:
@ -160,7 +201,7 @@ namespace sprout {
{}
SPROUT_CONSTEXPR value_holder(value_holder const&) = default;
SPROUT_CONSTEXPR value_holder(value_holder&&) = default;
explicit SPROUT_CONSTEXPR value_holder(param_type p)
explicit SPROUT_CONSTEXPR value_holder(argument_type p)
: holder_(helper_type::hold(p))
{}
explicit SPROUT_CONSTEXPR value_holder(movable_argument_type p)
@ -183,7 +224,7 @@ namespace sprout {
value_holder& operator=(value_holder const&) = default;
value_holder& operator=(value_holder&&) = default;
value_holder& operator=(param_type p) {
value_holder& operator=(argument_type p) {
value_holder temp(helper_type::hold(p));
temp.swap(p);
return *this;
@ -218,6 +259,12 @@ namespace sprout {
SPROUT_CONSTEXPR mutable_or_const_reference get() const {
return helper_type::ref(holder_);
}
reference value() {
return get();
}
SPROUT_CONSTEXPR mutable_or_const_reference value() const {
return get();
}
pointer operator->() SPROUT_NOEXCEPT {
return helper_type::ptr(holder_);