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

microsoft · Sep 21, 2023 · 1c928ac · 1c928ac
1 parent e934ec1
commit 1c928ac
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/stl/inc/xlocnum b/stl/inc/xlocnum
@@ -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;