History: Exceptions In C Plus Plus
Why we don't use exceptions in our code
As told by Mike Shaver to Dave Liebreich, 5-Dec-2005
some of the reasons exceptions are not used are:
- problems with older compilers' implementation of exceptions. This reason will go away as we drop support for older compilers over time.
- problems with exceptions that have to cross boundaries between C, C++, and/or XPCOM.
- lots of the existing code is not exception-safe.
C++ templates are slowly being adopted, so it's not like we never use different stuff.