Re: Determine if function is defined with C API?

["Jerome Vuarand" <jerome.vuarand@...>]

2008/8/1 Joey Mukherjee <joey@swri.edu>:
> Here's a snippet of my code:
>
>        lua_getglobal (LState, "get_number_of_sensors");           //
> function to be called
>        if (lua_isfunction (LState, 0) == 1) {
>            if (lua_pcall (LState, 0, 1, 0) == 0) {
>
> This doesn't work.  Is it because I don't have the right index?  I am
> assuming the lua_getglobal either found the function or if it didn't, how
> would I know?  How do I find the right index to send to lua_isfunction?

lua_getglobal pushes the global on the top of the stack. The index of
the top of the stack is either -1 or lua_gettop(L). That is the value
you should pass to lua_isfunction.