15 Jul
2007
15 Jul
'07
5:05 p.m.
On Sun, 2007-07-15 at 20:52 +0200, Julien Claassen wrote:
Hi!
Sorry to bother again. But I have the following problem I can't solve.
I need to wrap some readline-code in my c++-class. Readline has some
function-pointers you can set to a function you wrote yourself. So I did. The
sinature of my function ALMOST matches that expected by readline, but it
complains about the class part of my signature:
my function:
char** (Midish_rl::*)(const char*, int, int);
Readline expects:
char8* (*)(const char*, int, int);
I tired writing a wrapper function, but for that I need some object, I just
tried:
char** wrapper(const char *text, int start, int end)
{
return my_ui.real_function(text,start,end);
}
The code is divided between a few files, so I couldn't just a a global
object 'my_ui', which was known at all times.
If the Readline callback format does not have a parameter to pass user
data (which is a rather crappy design if that's the case) you have to
use a global variable of some sort. You can declare it 'extern' in a
header that you include in all files that need it, or make it a
singleton class with a static get_instance() member, or some similar
technique.
--ll