Catch all exception handler

[thk686]

First, thanks for this package! I've longed for a lean R to C++ interface for quite awhile.

It looks like the END_CPP11 macro lacks a catch-all exception handler. I was using a Boost library and wondering why I was getting aborts (it was not using std::exception). Was a catch(...){} block intentionally omitted?

cpp11::cpp_function('void test() { throw; }')
test() # abort

On OSX

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> cpp11::cpp_function('void test() { throw; }')
> test() # abort
libc++abi.dylib: terminating
zsh: abort      R

[jimhester]

Just because we hadn't yet encountered code that was issuing exceptions that didn't inherit from std::exception, but we can add this, thanks for opening the issue.

[jimhester]

Ok this now should work how you assumed it would. Note I had to tweak your example slightly to throw an integer exception as throw; without any arguments is used to rethrow exceptions (and would skip even the universal try / catch block).

cpp11::cpp_function('void test() { throw 42; }')
test()
#> Error in test(): C++ error (unknown cause)

^{Created on 2020-07-15 by the reprex package (v0.3.0)}

[thk686]

Perfect. Thanks. (Yes, been a long time since I read through the legalese on throw/try/catch...)