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---@class core.object
---@field super core.object
local Object = {}
Object.__index = Object
---Can be overrided by child objects to implement a constructor.
function Object:new() end
---@return core.object
function Object:extend()
local cls = {}
for k, v in pairs(self) do
if k:find("__") == 1 then
cls[k] = v
end
end
cls.__index = cls
cls.super = self
setmetatable(cls, self)
return cls
end
---Check if the object is strictly of the given type.
---@param T any
---@return boolean
function Object:is(T)
return getmetatable(self) == T
end
---Check if the parameter is strictly of the object type.
---@param T any
---@return boolean
function Object:is_class_of(T)
return getmetatable(T) == self
end
---Check if the object inherits from the given type.
---@param T any
---@return boolean
function Object:extends(T)
local mt = getmetatable(self)
while mt do
if mt == T then
return true
end
mt = getmetatable(mt)
end
return false
end
---Check if the parameter inherits from the object.
---@param T any
---@return boolean
function Object:is_extended_by(T)
local mt = getmetatable(T)
while mt do
if mt == self then
return true
end
local _mt = getmetatable(T)
if mt == _mt then break end
mt = _mt
end
return false
end
---Metamethod to get a string representation of an object.
---@return string
function Object:__tostring()
return "Object"
end
---Metamethod to allow using the object call as a constructor.
---@return core.object
function Object:__call(...)
local obj = setmetatable({}, self)
obj:new(...)
return obj
end
return Object
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