[#STDCXX-680] use_facet and has_facet are unreliable unless dynamic_cast is available

C++ Standard Library

use_facet and has_facet are unreliable unless dynamic_cast is available

Created: 17/Dec/07 06:05 PM Updated: 11/Jul/09 12:00 AM

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Component/s:

22. Localization

Affects Version/s:

4.1.2, 4.1.3, 4.1.4, 4.2.0

Fix Version/s:

4.2.2

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This issue relates to:

~~STDCXX-872~~ [XLC++ 7,8,9] unexpected assertions in 18.support.rtti.cpp

~~STDCXX-664~~ [IBM XLC++ 9.0/AIX 5.3] SIGABRT in 22.locale.globals.mt

Severity:

Incorrect Behavior

Description

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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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