Module macro.lib.class
a basic class mechanism.
Used for some of the demonstrations; the class macro in the module
package uses it. It provides a single function which returns a new 'class'.
The resulting object can be called to generate an instance of the class.
You may provide a base class for single inheritance; in this case, the functions
of the base class will be copied into the new class' metatable (so-called 'fat metatable')
Example:
local class = require 'macro.lib.class'
A = class()
function A._init(name) self.name = name end
a = A("hello")
assert(a.name == "hello")