[boost] Config macro to check for RTTI.

From: Michael Marcin (mmarcin_at_[hidden])
Date: 2007-02-22 18:11:59

Hi, I'm working on a platform that has exceptions and STL but no 
std::type_info (weird right?).
I want to use lexical_cast but I can't only because bad_lexical_cast uses 
type_info.
I've modified my local copy with #ifdef HAS_RTTI around the 3 places 
bad_lexical_cast is used to simply throw a bad_lexical_cast without the 
source and target type_info members.

Is there a standard BOOST_HAS_TYPE_INFO or some other config macro I 
can/should use for this?

Thanks,

Michael Marcin