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[libcxx][ios] initialize __fill_val_ in _FillHelper #110279

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Merged
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Sep 30, 2024
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[libcxx][ios] initialize __fill_val_ in _FillHelper #110279

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5 changes: 4 additions & 1 deletion libcxx/include/ios
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Original file line number Diff line number Diff line change
Expand Up @@ -524,7 +524,10 @@ template <class _Traits>
// Attribute 'packed' is used to keep the layout compatible with the previous
// definition of the '__fill_' and '_set_' pair in basic_ios on AIX & z/OS.
struct _LIBCPP_PACKED _FillHelper {
_LIBCPP_HIDE_FROM_ABI void __init() { __set_ = false; }
_LIBCPP_HIDE_FROM_ABI void __init() {
__set_ = false;
__fill_val_ = _Traits::eof();
}
_LIBCPP_HIDE_FROM_ABI _FillHelper& operator=(typename _Traits::int_type __x) {
__set_ = true;
__fill_val_ = __x;
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