Gabriel Dos Reis wrote: [...]
http://www.codesourcery.com/public/cxx-abi/abi-eh.html
And quoting for the document:
# A two-phase exception-handling model is not strictly necessary to implement # C++ language semantics, but it does provide some benefits. For example, ^^^^^^^^^^^^
# the first phase allows an exception-handling mechanism to dismiss an # exception before stack unwinding begins, which allows resumptive exception # handling (correcting the exceptional condition and resuming execution at # the point where it was raised). While C++ does not support resumptive # exception handling, other languages do, and the two-phase model allows # C++ to coexist with those languages on the stack.
How many industrial strength languages support resumptive exception handling?
Irrelevant. There are other benefits provided by two-phase EH apart from resumption. Avoiding unwinding for unexpected exceptions, for example. regards, alexander.