use_facet and has_facet are unreliable unless dynamic_cast is available
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Key: STDCXX-680
URL: https://issues.apache.org/jira/browse/STDCXX-680
Project: C++ Standard Library
Issue Type: Bug
Components: 22. Localization
Affects Versions: 4.2.0
Reporter: Travis Vitek
The function that is called by has_facet<>() and use_facet<>() uses
_RWSTD_DYNAMIC_CAST in an attempt to check that the returned locale facet is of
the requested type. Unfortunately, if RTTI is not supported or enabled, that
cast becomes unreliable.
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