Re: PATCH: Fully Resumable VM (yield across pcall/callback/meta/iter)
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- Subject: Re: PATCH: Fully Resumable VM (yield across pcall/callback/meta/iter)
- From: David Burgess <dburgess@...>
- Date: 2005年2月15日 22:24:20 +1000
Wow! Mike I am truly impressed.
One question.
> Document that compiling the Lua core with C++ exceptions makes throwing errors dead
>slow. In fact there is no need to compile the core with C++ at all.
No matter how you compile
> it, it provides a C API only. And you ought to catch all C++ exceptions in your own module
>code, anyway. At least now you get a proper error message if you
forget to do so.
I am (sadly) a VC6 user.
int somefunc(lua_State* L)
{
AClass anobject();
luaL_error(L,"an error");
}
The problem here is that anobject() does not have its destructor called.
Compiling VC6 with /GX /EHsc- (Which tells C++ functions that C functions
MAY throw an exception) helps. I ended up using C++ exceptions because
it appears that setjmp/longjmp and try/catch/throw and C++ destructors are
an incompatible mix.
Do you have any wisdom on this subject? Does anyone else?
DB