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Re: operator==() of the type_info class

On Thu, Oct 04, 2001 at 07:43:21PM +0200, Jakub Jelinek wrote:
> On Thu, Oct 04, 2001 at 02:12:39PM +0000, Jörg Budischewski wrote:
> > There is currently some effort underway to port the linux build of 
> > openoffice from gcc 2.95.2 to gcc 3.01.
> > The throwing of exceptions via shared library boundaries only works, when 
> > the shared library exports the exception's typeinfo symbol. This is due 
> > to that the type_info::operator==() is implemented by comparing the 
> > type_info-instances-pointers instead of comparing the type-names. 
> That's what the new ABI sais.

Yes, exactly.  If a particular platform is capable of merging the
typeinfo sections into a single unified section, then pointer comparison
(O(1)) is correct.  Otherwise, a strcmp() is performed, which is O(n).
GNU/Linux falls into the "good" category here.  :-)


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