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[libc++][vector] Make constructor vector(count, value, allocator) exception-safe #82033

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[libc++][vector] Make constructor vector(count, value, allocator) exception-safe #82033

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2 changes: 2 additions & 0 deletions libcxx/include/vector
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Original file line number Diff line number Diff line change
Expand Up @@ -433,10 +433,12 @@ public:
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
vector(size_type __n, const value_type& __x, const allocator_type& __a)
: __end_cap_(nullptr, __a) {
auto __guard = std::__make_exception_guard(__destroy_vector(*this));
if (__n > 0) {
__vallocate(__n);
__construct_at_end(__n, __x);
}
__guard.__complete();
}

template <class _InputIterator,
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