Cast problem in lua
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- Subject: Cast problem in lua
- From: zuric lynn <zurrix@...>
- Date: Sun, 3 Apr 2005 23:44:43 +0800
First there is a c++ class called target
and it has a method called attack()
now i get a lua class to derive the 'target' class
~~~~~~~~~~~~~~~~~~~~~~~~~~~
class 'father' (target)
function father:__init()
end
function father:Act()
print('i'm father')
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Now there is a method called GetTarget() in c++
returns a pointer of a 'target'
but actually this pointer should be a 'father' but c++ didn't know
about lua classes
for actually this object is instanced by the construtor of father in lua
so i am wondering if i can run the function of 'father' with this instance
~~~~~~~~~~C++ code~~~~~~~~~~~~~
// return a instance of father which instanced in lua and c++ didn't know it
target* GetTarget() ;
and registe here
def("GetTarget", &GetTarget)
~~~~~~~~~Lua code~~~~~~~~~~~~~~~
target = GetTarget()
target:Act() -- Act() is the method of father
-- how do lua know this target pointer is
actually a instance of father
-- so Act() can be called
-- is there something like <father>target --
cast it to father?
~~~~~~~~~~~~~~~~~~~~~~~~~~~