Re: Current state of 5.1, and the PS2.
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- Subject: Re: Current state of 5.1, and the PS2.
- From: Rici Lake <lua@...>
- Date: Thu, 2 Nov 2006 22:19:49 -0500
On 2-Nov-06, at 9:39 PM, Glenn Maynard wrote:
Anyhow, a "lua_checkfunctionenv(L)" function to throw an error if L is
not in a Lua C call could prevent "didn't call through Lua" from being
a
lurking bug.
It's not going to lurk, by the way. In my experience, it simply
segfaults when you call luaopen_io. It might be nice to have a better
error message :) but I don't believe that it will leave any sort of
lurking poisoned chalice about. I could be wrong, though... I haven't
tested it on more than a few systems, and that accidentally.
If you just use luaL_openlibs() from linit.c, customising the library
list according to your needs, then you avoid the whole problem. (Or if
you create a custom version which accepts a luaL_Reg structure as a
second parameter.) Assuming that the library writers don't follow my
advice and do pollute the global namespace with their libraries.
I think the following will implement the function you're looking for:
lua_Debug ar;
if (lua_getstack(L, 0, &ar) = 0) {
printf("No call frame available");
exit(1); /* Can't call lua_error() */
}
- References:
- Re: Current state of 5.1, and the PS2., Brian Weed
- Re: Current state of 5.1, and the PS2., Sam Roberts
- Re: Current state of 5.1, and the PS2., Glenn Maynard
- Re: Current state of 5.1, and the PS2., Rici Lake
- Re: Current state of 5.1, and the PS2., Glenn Maynard