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From: Terje Slettebø (tslettebo_at_[hidden])
Date: 2003-03-26 15:51:02

>From: "Rozental, Gennadiy" <gennadiy.rozental_at_[hidden]>

> > Another way may be a macro. However, as has been mentioned in
> > this thread,
> > it appears that the config macros aren't geared for macros
> > with optional
> > exclusion of RTTI.
> No. this has nothing to do with config

Well, as Dave A said in another mail, there is already a config macro to
disable exceptions. Whether or not libraries check for it is optional,
though. From the docs:

"BOOST_NO_EXCEPTIONS - The compiler does not support exception handling
(this setting is typically required by many C++ compilers for embedded
platforms). Note that there is no requirement for boost libraries to honor
this configuration setting - indeed doing so may be impossible in some
cases. Those libraries that do honor this will typically abort if a critical
error occurs - you have been warned!"

Embedded C++ doesn't have RTTI, either. Therefore, a BOOST_NO_RTTI might be
reasonable, as well.

I understand that your suggestion is not for macros describing lack of
compiler support, but rather user settings. Yet, couldn't these be used for
either, by explicitly setting them before any Boost includes?

Having a lexical_cast-specific macro will just cover that component, while
the same issue could occur with another library, unless a Boost-wide
configuration macro is used.



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