Re: isLmark() segmentation violation

[Edgar Toernig <froese@...>]

Taj Khattra wrote:
> 
> On Tue, Dec 04, 2001 at 11:10:05AM +0100, Edgar Toernig wrote:
> >
> > PS: luaL_check_int is meant for arguments, not results.
> 
> how can i typecheck the result then - i thought that
> luaL_check_int() would be sufficient to verify that

luaL_check_int is a helper function to check function arguments
and it simply raises an error like:

  bad argument #1 to `funcname' (number expected, got string)

Not very suitable to fetch function results.

There are a lot of thing you can do: simply use lua_tonumber();
it will return 0 if the object wasn't a number.  Or perform an
explicit check with lua_isnumber (accepts numbers and numeric
strings).  Or use lua_rawtag(...)==LUA_TNUMBER.  Anyway, you
have to handle non-number results somehow...

Ciao, ET.