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As a conforming extension give tuple a noexcept default constructor conditionalized on its held types. 

llvm-svn: 159858
This commit is contained in:
Howard Hinnant 2012-07-06 20:50:27 +00:00
parent a62ebe043e
commit a0f4c45c38
1 changed files with 9 additions and 5 deletions
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14
libcxx/include/tuple
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@ -227,7 +227,8 @@ class __tuple_leaf
__tuple_leaf& operator=(const __tuple_leaf&);
public:
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() : value()
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf()
_NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : value()
{static_assert(!is_reference<_Hp>::value,
"Attempted to default construct a reference element in a tuple");}
@ -347,7 +348,8 @@ class __tuple_leaf<_Ip, _Hp, true>
__tuple_leaf& operator=(const __tuple_leaf&);
public:
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() {}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf()
_NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY
@ -437,7 +439,8 @@ struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...>
: public __tuple_leaf<_Indx, _Tp>...
{
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR __tuple_impl() {}
_LIBCPP_CONSTEXPR __tuple_impl()
_NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {}
template <size_t ..._Uf, class ..._Tf,
size_t ..._Ul, class ..._Tl, class ..._Up>
@ -535,7 +538,8 @@ class _LIBCPP_VISIBLE tuple
public:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR tuple() {}
_LIBCPP_CONSTEXPR tuple()
_NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {}
_LIBCPP_INLINE_VISIBILITY
explicit tuple(const _Tp& ... __t)
@ -693,7 +697,7 @@ class _LIBCPP_VISIBLE tuple<>
{
public:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR tuple() {}
_LIBCPP_CONSTEXPR tuple() _NOEXCEPT {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY
tuple(allocator_arg_t, const _Alloc&) {}