[PATCH] Check dynamic_cast is not used with -fno-rtti

Jean-Daniel Dupas devlists at shadowlab.org
Mon Jul 29 09:17:11 PDT 2013

Le 29 juil. 2013 à 17:52, Arnaud A. de Grandmaison <arnaud.adegm at gmail.com> a écrit :

> Clang emits an error when typeid is used with -fno-rtti, but does not
> perform a similar check for dynamic_cast.
> The attached patch implements the check.
> I have done it late in 'CastOperation::CheckDynamicCast' , as some
> dynamic_cast can be resolved statically, and will thus require no
> support from the runtime, but we may also want to be more paranoïd.
> Any thoughts ?

If we want to support dynamic_cast without rtti when possible (as you do in your patch), you may add such case in the test to make sure clang accepts it.

-- Jean-Daniel

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