On 2014-09-23 19:37, Andrei Alexandrescu wrote:
We need a libunwind expert to figure out a good approach for handling exceptions thrown by C++ code into D.
BTW, are you only interested in handling C++ exception, or are you interested in handling D exceptions in C++ as well?
One ugly hack is to register a terminate handler. Then in the handler extract the necessary information from the exception, create a D exception with this information and throw it as a regular D exception.
Throwing a D exception that should be catchable in C++ is a bit more tricky. It's possible to wrap the a call to a D function in a try-catch block. Convert the D exception to a C++ exception, then throw it using a function part of the C++ exception runtime. The problem here is that C++ won't be able to catch this exception because there's no personality function (or similar) setup by the D compiler.
Ideally D should just use the same exception mechanism as C++. I don't think a language change is necessary for this. Changes in the compiler, yes, but hopefully not in the language.
-- /Jacob Carlborg
