automated getter/setter generation example for lua "classes"

ClassWithAutoMethods.lua

local defaults = {
	name = "",
	words = "",
	mana = 0,
	manaPercent = 0,
	soul = 0,
	spellId = 0,
	range = -1,
	level = 0,
	magLevel = 0,
	cooldown = 1000,
	groupCooldown = 1000,
	secondaryGroupCooldown = 0,
	
	group = SPELLGROUP_NONE,
	secondaryGroup = SPELLGROUP_NONE,
	spellType = SPELL_UNDEFINED,
	
	premium = false,
	enabled = true,
	learnable = false,
	pzLock = false,
	aggressive = true,
	blockingCreature = false,
	blockingSolid = false,
	needWeapon = true,
	selfTarget = false,
	needTarget = false,
	
	vocations = {}
}

-- necessary for automated getter/setter
-- do not move, else it will also generate for methods starting with "__"
local keys = {}
for key, _ in pairs (defaults) do
	table.insert(keys, key)
end

LuaSpell = setmetatable(defaults,
	{
		__call = function(luaSpell, ...)
			return luaSpell.new(...)
		end
	}
)

LuaSpell.__index = LuaSpell
LuaSpell.__call = function(self)
	return LuaSpell.new(self)
end

function LuaSpell.new(name, words)
	local self = setmetatable({ }, LuaSpell)
	
	if name then
		self.name = name
	end
	
	if words then
		self.words = words
	end
	
	return self
end

-- getter/setter generator
local function generate(key)
	local k = key
	k = k:gsub("^%l", string.upper)
	
	local getter = "function LuaSpell:get" .. k .. "() return self." .. key .. " end"
	print(getter)
	loadstring(getter)()
	
	local setter = "function LuaSpell:set" .. k .. "(value) self." .. key .. " = value end"
	print(setter)
	loadstring(setter)()
end

-- auto generate getter/setter
for i = 1, #keys do
	generate(keys[i])
end

obj_1 = LuaSpell("obj 1")
obj_2 = LuaSpell("obj 2")
obj_3 = LuaSpell()
obj_1:setName("obj 1 modified")

print(obj_1:getName(), obj_2:getName(), obj_3:getName())