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Make std::get constexpr

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@186525 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2013-07-17 18:25:36 +00:00
parent f7777e8554
commit 8fc4f5a251
12 changed files with 299 additions and 51 deletions
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35
include/array
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@@ -59,14 +59,14 @@ struct array
// element access:
reference operator[](size_type n);
const_reference operator[](size_type n) const;
const_reference at(size_type n) const;
const_reference operator[](size_type n) const; // constexpr in C++14
const_reference at(size_type n) const; // constexpr in C++14
reference at(size_type n);
reference front();
const_reference front() const;
const_reference front() const; // constexpr in C++14
reference back();
const_reference back() const;
const_reference back() const; // constexpr in C++14
T* data() noexcept;
const T* data() const noexcept;
@@ -92,9 +92,9 @@ template <class T> class tuple_size;
template <int I, class T> class tuple_element;
template <class T, size_t N> struct tuple_size<array<T, N>>;
template <int I, class T, size_t N> struct tuple_element<I, array<T, N>>;
template <int I, class T, size_t N> T& get(array<T, N>&) noexcept;
template <int I, class T, size_t N> const T& get(const array<T, N>&) noexcept;
template <int I, class T, size_t N> T&& get(array<T, N>&&) noexcept;
template <int I, class T, size_t N> T& get(array<T, N>&) noexcept; // constexpr in C++14
template <int I, class T, size_t N> const T& get(const array<T, N>&) noexcept; // constexpr in C++14
template <int I, class T, size_t N> T&& get(array<T, N>&&) noexcept; // constexpr in C++14
} // std
@@ -181,14 +181,14 @@ struct _LIBCPP_TYPE_VIS array
// element access:
_LIBCPP_INLINE_VISIBILITY reference operator[](size_type __n) {return __elems_[__n];}
_LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __n) const {return __elems_[__n];}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference operator[](size_type __n) const {return __elems_[__n];}
reference at(size_type __n);
const_reference at(size_type __n) const;
_LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference at(size_type __n) const;
_LIBCPP_INLINE_VISIBILITY reference front() {return __elems_[0];}
_LIBCPP_INLINE_VISIBILITY const_reference front() const {return __elems_[0];}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference front() const {return __elems_[0];}
_LIBCPP_INLINE_VISIBILITY reference back() {return __elems_[_Size > 0 ? _Size-1 : 0];}
_LIBCPP_INLINE_VISIBILITY const_reference back() const {return __elems_[_Size > 0 ? _Size-1 : 0];}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const_reference back() const {return __elems_[_Size > 0 ? _Size-1 : 0];}
_LIBCPP_INLINE_VISIBILITY
value_type* data() _NOEXCEPT {return __elems_;}
@@ -210,6 +210,7 @@ array<_Tp, _Size>::at(size_type __n)
}
template <class _Tp, size_t _Size>
_LIBCPP_CONSTEXPR_AFTER_CXX11
typename array<_Tp, _Size>::const_reference
array<_Tp, _Size>::at(size_type __n) const
{
@@ -306,32 +307,32 @@ public:
};
template <size_t _Ip, class _Tp, size_t _Size>
_LIBCPP_INLINE_VISIBILITY inline
_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp&
get(array<_Tp, _Size>& __a) _NOEXCEPT
{
static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array)");
return __a[_Ip];
return __a.__elems_[_Ip];
}
template <size_t _Ip, class _Tp, size_t _Size>
_LIBCPP_INLINE_VISIBILITY inline
_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR_AFTER_CXX11
const _Tp&
get(const array<_Tp, _Size>& __a) _NOEXCEPT
{
static_assert(_Ip < _Size, "Index out of bounds in std::get<> (const std::array)");
return __a[_Ip];
return __a.__elems_[_Ip];
}
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <size_t _Ip, class _Tp, size_t _Size>
_LIBCPP_INLINE_VISIBILITY inline
_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp&&
get(array<_Tp, _Size>&& __a) _NOEXCEPT
{
static_assert(_Ip < _Size, "Index out of bounds in std::get<> (std::array &&)");
return _VSTD::move(__a[_Ip]);
return _VSTD::move(__a.__elems_[_Ip]);
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES