32LoGEx now allows for all metamethods for your custom class.
32LoGEx now creates a pseudo-type for your custom class which can be returned by the lua type() function.
Code: Select all
--[[
This is a modification of the '32 Lines of Goodness' found at https://love2d.org/wiki/32_lines_of_goodness.
Added Features:
Allows the creation of all known metamethods for each class.
E.g.,
class "MyClass" {};
function MyClass:__tostring() return "This is what I want to return." end
local obj = MyClass:new();
print(tostring(obj));
-> Output would be "This is what I want to return."
Creates pseudo-types of each class created by overriding the lua type() function.
E.g.:
class "CoolClass" {};
local obj = CoolClass:new();
print(type(obj));
-> output would be "CoolClass"
Copyright © 2019 AMSPublic.org
This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
]]
local mt_class = {}
function mt_class:extends(parent)
self.super = parent
setmetatable(mt_class, {__index = parent})
parent.__members__ = parent.__members__ or {}
return self
end
local function define(class, members)
class.__members__ = class.__members__ or {}
for k, v in pairs(members) do
class.__members__[k] = v
end
function class:new(...)
local newvalue = {}
for k, v in pairs(class.__members__) do
newvalue[k] = v
end
setmetatable(newvalue,
{
__index = class,
__add = class.__add,
__concat = class.__concat,
__div = class.__div,
__eq = class.__eq,
__le = class.__le,
__len = class.__len,
__lt = class.__lt,
__mod = class.__mod,
__mul = class.__mul,
__newindex = class.__newindex,
__pow = class.__pow,
__sub = class.__sub,
__tostring = class.__tostring,
__type = class.__type,
__unm = class.__unm,
}
);
if newvalue.__init then
newvalue:__init(...);
end
return newvalue;
end
end
function class(name)
local newclass = {
__add = function() end,
__concat = function() end,
__div = function() end,
__eq = function() end,
__le = function() end,
__len = function() end,
__lt = function() end,
__mod = function() end,
__mul = function() end,
__newindex = function() end,
__pow = function() end,
__sub = function() end,
__tostring = function() end,
__type = name,
__unm = function() end,
};
_G[name] = newclass;
return setmetatable(newclass, {__index = mt_class, __call = define});
end
local _type = type;
function type(vObj)
local sType = _type(vObj);
if (sType == "table") then
local tMeta = getmetatable(vObj);
if (tMeta) then
if (tMeta["__type"]) then
sType = tMeta["__type"];
end
end
end
return sType;
end