Give Me Flexibility *and* Give Me Types.

A defence of multiple inheritance (and things suspeciously close to it).

One day, you wake up with a strange impulse: "I want to make a game". So, you fire up your editor and get typing away. You decide to reach for tools you know well: Lua and LÖVE (just go with okay). This project begins with a few basic functions:

local function hurt(self, amount)
    self.health = self.health + amount
end

local function heal(self, amount)
    self.health = self.health + amount
end

local function attack(self, other)
    other:hurt(self.weapon.power)
end

local function parry(self, other)
    local power_diff = self.weapon.power - self.weapon.power

    if power_diff >= 0 then
        other:hurt(power_diff)
    else
        self:hurt(-power_diff)
    end
end