lua-resty-class

Python multiple inheritance class (mro) implementation.

Install

    opm get xiangnanscu/lua-resty-class

Api

making a class

    local A = Class() -- same as:
    local A = Class {}
    local A = Class 'A' -- same as:
    local A = Class { __name__ = 'A' }
    local C = Class {A, B} -- multiple inheritance like python

Class.super(cls, self)

Call the super method of C

    Class.super(C, self)

Class.inspect(cls)

Print the mro chain of cls

Synopsis

    local Class = require("resty.class")
    
    local A = Class {
      __name__ = 'A',
      echo = function(self)
        print('call a.echo')
      end,
    }
    
    local B = Class { A }
    B.__name__ = 'B'
    function B:echo()
      Class.super(B, self):echo()
      print('call b.echo')
    end
    
    Class.inspect(B)
    
    local C = Class { A }
    C.__name__ = 'C'
    function C:echo()
      Class.super(C, self):echo()
      print('call c.echo')
    end
    
    Class.inspect(C)
    
    local D = Class { C, B }
    D.__name__ = 'D'
    function D:echo()
      Class.super(D, self):echo()
      print('call d.echo')
    end
    
    Class.inspect(D)
    
    local c = C()
    c:echo()
    print('------------')
    local d = D()
    d:echo()
    

output:

    B > A > object
    C > A > object
    D > C > B > A > object
    call a.echo
    call c.echo
    ------------
    call a.echo
    call b.echo
    call c.echo
    call d.echo