Re: SWIG, C++ Exceptions, and Lua

[Miles Bader <miles@...>]

Joey Mukherjee <joey@swri.edu> writes:
> Is it possible to make SWIG and Lua work well with C++ exceptions?  If
> so, what is the best way?
>
> Really, the only thing I need is for Lua to not swallow my exceptions
> and allow the exception to pass through to main program.

Hmm maybe I mis-understand the problem, but everything seems to work ok
for me...

swig just throws a normal lua error for its errors, and in my program,
my "top-level" calls into Lua use a function like this:

   static void
   do_call (lua_State *L, int nargs, int nres)
   {
     int err = lua_pcall (L, nargs, nres, 0);
     if (err)
       {
         string err_str = lua_tostring (L, -1);
         throw file_error (err_str);
       }
   }

So any error swig signals will cause that pcall to return an error, and
the above function will turn that into a C++ exception...

-Miles

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