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Fix PR#25973 : 'basic_string::assign(InputIt, InputIt) doesn't provide the strong exception safety guarantee'. This turned out to be a pervasive problem in <string>, which required a fair amount of rework. Add in an optimization for when iterators provide noexcept increment/comparison/assignment/dereference (which covers many of the iterators in libc++). Reviewed as http://reviews.llvm.org/D15862

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@257682 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-01-13 21:54:34 +00:00
parent b27535c0c3
commit df9db31c27
43 changed files with 771 additions and 112 deletions
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19
include/algorithm
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@@ -1687,25 +1687,6 @@ search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const
}
// copy
template <class _Iter>
struct __libcpp_is_trivial_iterator
{
static const bool value = is_pointer<_Iter>::value;
};
template <class _Iter>
struct __libcpp_is_trivial_iterator<move_iterator<_Iter> >
{
static const bool value = is_pointer<_Iter>::value;
};
template <class _Iter>
struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> >
{
static const bool value = is_pointer<_Iter>::value;
};
template <class _Iter>
inline _LIBCPP_INLINE_VISIBILITY
_Iter