Re: Function is available ?!

[Mark Hamburg <mark@...>]

On Dec 4, 2010, at 8:52 AM, steve donovan wrote:

> On Sat, Dec 4, 2010 at 6:42 PM, Peyman <peiman_3009@yahoo.com> wrote:
>> this is possible to know a function in lua is exist before i want call it with lua_call ?
> 
>> From the manual:
> "int lua_isfunction (lua_State *L, int index);
> 
> Returns 1 if the value at the given acceptable index is a function
> (either C or Lua), and 0 otherwise."
> 
> So if you get your function somewhere (maybe look it up globally) then
> lua_isfunction(L,-1) will tell you if the object on the top of the
> stack is indeed a function.

Though it won't tell you whether it has a call metamethod.

When in doubt, I tend to use lua_pcall.

Mark