lua委托

function func(a)
  print(a)
end
 
function bind(func, ...)    
    return function(...)
        func( ...)
    end
end
 
 
f = bind(func)
f(1)

a = {}
 
function a.init(data)
    a.data = data
end
 
function a.func(self,t)
  print(self.data)
end
 
function bind(self, func, ...)    
    return function(self, ...)
        func( self ,...)
    end
end
 
a.init(2)
f = bind(a, a.func)
f(a, 1)

a = {}
function a:new(data)
    o = setmetatable({}, {__index = self})
    self.data = data
    return o
end
 
function a:func()
  print(self.data)
end
 
function bind(self, func, ...)    
    return function(self, ...)
        func( self ,...)
    end
end
 
t = a:new(2)
f = bind(t, t.func)
f(t)

function func(self, a)
  print(a)
end
 
function bind(self, func, ...)    
    return function(self, ...)
        func(self, ...)
    end
end
 
 
f = bind(nil, func)
f(nil, 2)