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Tolerate 80-bit long double in <xlocnum> #4032

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Sep 21, 2023
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Tolerate 80-bit long double in <xlocnum> #4032

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4 changes: 3 additions & 1 deletion stl/inc/xlocnum
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Original file line number Diff line number Diff line change
Expand Up @@ -614,7 +614,9 @@ protected:

virtual _InIt __CLR_OR_THIS_CALL do_get(_InIt _First, _InIt _Last, ios_base& _Iosbase, ios_base::iostate& _State,
long double& _Val) const { // get long double from [_First, _Last) into _Val
static_assert(sizeof(double) == sizeof(long double), "Bad assumption: sizeof(double) == sizeof(long double).");
// Assumes sizeof(double) == sizeof(long double).
// For 80-bit long double (which is not supported by MSVC in general), this will compile
// but will not attempt to handle the increased precision at runtime.
double _Result;
_First = num_get::do_get(_First, _Last, _Iosbase, _State, _Result); // avoid virtual call for perf
_Val = _Result;
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