exception fro property and tostring

[Денис Приёмов]

Hi gurus,
Hope you can find a spare time for my troubles...
I love lua and luabind though stumbled upon them only recently.
So far everything goes smooth but there are couple glitches I'd like to ask
you for a help.

1) It seems luabind handles std::exception thrown from object methods (bind
with .def). However when I have a property is bound like this:
.property("some", &MyClass::GetSome, &MyClass::SetSome)
and an std::exception is thrown from SetSome then it "successfully" unwinds
to the very end of my app (please find the bt at the end of the email).
Of course there's a straight solution to try/catch it around my call to
lua_resume but this isn't the proper way I'd guess...

2) I've got "no match for function call 'function-name' with the parameters
(parameter-types)" error from luabind in the following scenario:
struct A
{
    explicit A(int n)    :n_(n)    {}
    int n_;
};

struct B
{
    A    a_;
    A const& get_a() const    {return a_;}    //this one is bound as
.property("a", &B::get_a) and tried with and w/o dependency policy
    B(int n) : a(n)    {}
};

For both classes operator<<(std::ostream...) is defined and tostring(self)
is bound for both classes as well.
However if I use the following in lua then the last line fails:
a = A(10)
print("a = "..tostring(a))    -- works fine
b = B(20)
print("b = "..tostring(b))    -- np here either
print("b.a = "..tostring(b.a))    -- no match error for no obvious reason...


I'd really appreciate your help and honor your expertise if anyone can help
or suggest anything... Thanks a lot in advance!



-------- backtrace of throw std::out_of_range from property -----------
#0  0xff01fc54 in _lwp_kill () from /lib/libc.so.1
#1  0xfefd0c50 in raise () from /lib/libc.so.1
#2  0xfefb6d58 in abort () from /lib/libc.so.1
#3  0xff34a0ac in __gnu_cxx::__verbose_terminate_handler ()
  at ../../../../libstdc++-v3/libsupc++/vterminate.cc:97
#4  0xff347be4 in __cxxabiv1::__terminate (handler=0xd1b0c8)
  at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:43
#5  0xff347c34 in std::terminate ()
  at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:53
#6  0xff347d7c in __cxa_throw (obj=<value optimized out>, tinfo=0xfeefb590,
dest=0)
  at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:77
#7  0x006c6d18 in component::check_range<eTrafficBounds> (value=@0xd1b098,
low=0, high=0, description=0x0)
  at ../../../../mgate/cmds/components/traffic_component.cpp:73
#8  0x0025cde0 in component::Traffic::SetPktSize (this=0x8fa588, size=@0x32)
  at ../../../../mgate/cmds/components/traffic_component.cpp:171
#9  0x006d6ff8 in luabind::detail::set<void, component::Traffic,
component::Traffic, component::range_t const&, luabind::detail::null_type>
(f=<error reading variable>, obj=<value optimized out>, L=0xcbcd30,
policies=<value optimized out>)
  at ../../../../../cots/luabind/detail/call.hpp:278
#10 0x006d711c in
boost::detail::function::function_obj_invoker2<boost::_bi::bind_t<int,
luabind::detail::set_caller<component::Traffic,
void(component::Traffic::*)(component::range_t const&),
luabind::detail::null_type>, boost::_bi::list3<boost::arg<1> (*)(),
boost::arg<2> (*)(),
boost::_bi::value<void(component::Traffic::*)(component::range_t const&)> >
 >, int, lua_State*, int>::invoke (function_obj_ptr=@0x25cdc4, a0=0x0,
a1=14350064)
  at ../../../../../cots/luabind/detail/property.hpp:107
#11 0x00724b38 in boost::function2<int, lua_State*, int,
std::allocator<boost::function_base> >::operator() ()
  at
/usr/local/gcc-4.1.1/lib/gcc/sparc-sun-solaris2.9/4.1.1/../../../../include/c++/4.1.1/new:93
#12 0x002ef43c in luabind::detail::class_rep::settable ()
  at ../../../../../cots/boost/boost/function/function_template.hpp:618
#13 0x002ef79c in luabind::detail::class_rep::settable_dispatcher ()
  at ../../../../../cots/boost/boost/function/function_template.hpp:618
#14 0x002d72b0 in luaD_precall ()
  at ../../../../../cots/boost/boost/function/function_template.hpp:618
#15 0x002d7654 in luaD_call ()
  at ../../../../../cots/boost/boost/function/function_template.hpp:618
#16 0x002e0b7c in luaV_execute ()
 at ../../../../../cots/boost/boost/function/function_template.hpp:618
#17 0x002d6e78 in luaD_rawrunprotected ()
 at ../../../../../cots/boost/boost/function/function_template.hpp:618
#18 0x002d7004 in lua_resume ()
 at ../../../../../cots/boost/boost/function/function_template.hpp:618
#19 0x002664b8 in scripting::LuaScript::Step (this=0xdaf6f0, max_ticks=0)
 at ../../../../mgate/cmds/scripting/script_lua.cpp:339

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