Re: [boost] BOOST_NO_EXCEPTIONS

From: John Maddock (John_Maddock_at_[hidden])
Date: 2002-02-13 07:34:27

>It seems to me that just adding BOOST_NO_EXCEPTIONS isn't enough.  There 
>needs to be some documentation that explains:
>
>   *  Why it is there (EmbeddedC++).
>
>   *  That boost libraries are not required to support it.
>
>   *  For boost libraries that do wish to support it, what are they 
>supposed to do when they detect an error that is documented as throwing an

>exception?  Do all such errors become undefined behavior in Embedded 
>C++?  (I'm sorry - I've never used Embedded C++ so don't know what they do

>about errors which normally would be reported via exception.)

Point taken, for the regex code it uses an "always on" assertion - so it
aborts if there is some critical failure - there isn't much else it can do
really (and this was the behaviour I was asked for in this case).  I've
added some more docs to the config entry for that macro:

"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!"

- John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/