【Lua实战】模块加载顺序：require 的依赖管理

-- 模块加载：依赖声明
local MODULES = {
    core = {deps = {}},
    config = {deps = {"core"}},
    battle = {deps = {"core", "config"}},
    ui = {deps = {"core", "config"}},
}
local loaded = {}
local function loadModule(name)
    if loaded[name] then return true end
    local mod = MODULES[name]
    if mod == nil then
        error("模块不存在: " .. name)
    end
    for _, dep in ipairs(mod.deps) do
        if not loaded[dep] then
            loadModule(dep)
        end
    end
    loaded[name] = true
    return true
end

-- 循环检测：递归标记
local player = class(actor)
local loading = {}
local function safeLoad(name, chain)
    if loading[name] then
        error("循环依赖: " .. table.concat(chain, " -> ") .. " -> " .. name)
    end
    loading[name] = true
    chain[#chain + 1] = name
    local mod = MODULES[name]
    if mod then
        for _, dep in ipairs(mod.deps) do
            safeLoad(dep, chain)
        end
    end
    loading[name] = nil
end